/* roulang page: index */
:root {
            --color-bg: #0B0E11;
            --color-surface: #12171D;
            --color-surface-2: #171E26;
            --color-surface-3: #1C242E;
            --color-primary: #FF6A2B;
            --color-primary-hover: #FF8145;
            --color-primary-glow: rgba(255, 106, 43, 0.35);
            --color-text: #F4F7FA;
            --color-muted: #AAB4BF;
            --color-muted-2: #8A95A1;
            --color-line: rgba(255, 255, 255, 0.10);
            --color-line-strong: rgba(255, 255, 255, 0.16);
            --color-success: #2EE59D;
            --color-warning: #FFC24B;
            --color-danger: #FF5C5C;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.28);
            --shadow-card-hover: 0 16px 50px rgba(255, 106, 43, 0.15), 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 24px rgba(0, 0, 0, 0.35);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ::selection {
            background: rgba(255, 106, 43, 0.35);
            color: #fff;
        }

        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }

        ::-webkit-scrollbar-thumb {
            background: #2A3441;
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #3A4655;
        }

        .font-mono-num {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1, 'lnum' 1;
            letter-spacing: -0.02em;
        }

        .container-wide {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        @media (max-width: 767px) {
            .container-wide {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        @media (max-width: 520px) {
            .container-wide {
                padding-left: 14px;
                padding-right: 14px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 14, 17, 0.55);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(11, 14, 17, 0.95);
            backdrop-filter: blur(24px) saturate(1.5);
            -webkit-backdrop-filter: blur(24px) saturate(1.5);
            border-bottom-color: var(--color-line-strong);
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.02em;
            color: var(--color-text);
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            opacity: 0.85;
        }

        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #D84A1A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            color: #0B0E11;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(255, 106, 43, 0.35);
            flex-shrink: 0;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .logo-text small {
            font-size: 10px;
            font-weight: 400;
            color: var(--color-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .nav-links a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.10);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 1px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-btn {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            border: 1px solid var(--color-line);
            background: rgba(255, 255, 255, 0.04);
            transition: all var(--transition-fast);
        }

        .search-btn:hover {
            color: var(--color-text);
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.08);
        }

        .search-btn svg {
            width: 17px;
            height: 17px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: 10px;
            font-size: 13.5px;
            font-weight: 600;
            background: var(--color-primary);
            color: #0B0E11;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-cta:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 6px 20px rgba(255, 106, 43, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: scale(0.97);
        }

        .nav-cta:focus-visible,
        .search-btn:focus-visible,
        .nav-links a:focus-visible {
            outline: 3px solid var(--color-primary-glow);
            outline-offset: 2px;
        }

        .hamburger {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            border: 1px solid var(--color-line);
            background: rgba(255, 255, 255, 0.04);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 4px;
            transition: all var(--transition-fast);
        }

        .hamburger:hover {
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.08);
        }

        .hamburger span {
            display: block;
            width: 16px;
            height: 1.8px;
            background: var(--color-text);
            border-radius: 1px;
            transition: all var(--transition-fast);
            transform-origin: center;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(5.8px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-5.8px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            z-index: 99;
            background: rgba(11, 14, 17, 0.98);
            backdrop-filter: blur(28px) saturate(1.5);
            -webkit-backdrop-filter: blur(28px) saturate(1.5);
            border-bottom: 1px solid var(--color-line-strong);
            padding: 16px 20px 24px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
            transition: all var(--transition-base);
        }

        .mobile-menu.open {
            display: block;
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu nav a {
            padding: 14px 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 10px;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }

        .mobile-menu nav a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--color-line);
        }

        .mobile-menu nav a.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.10);
            border-color: rgba(255, 106, 43, 0.25);
        }

        .mobile-menu .mobile-cta {
            margin-top: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 20px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 15px;
            background: var(--color-primary);
            color: #0B0E11;
            transition: all var(--transition-fast);
        }

        .mobile-menu .mobile-cta:hover {
            background: var(--color-primary-hover);
        }

        @media (max-width: 1023px) {
            .nav-links {
                display: none;
            }
            .nav-actions .search-btn {
                display: none;
            }
            .hamburger {
                display: flex;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding-top: 100px;
            padding-bottom: 72px;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            background-color: #0B0E11;
            isolation: isolate;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 17, 0.68) 0%, rgba(11, 14, 17, 0.82) 55%, rgba(11, 14, 17, 0.95) 100%);
            z-index: -2;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
            background-size: 56px 56px;
            z-index: -1;
            mask-image: radial-gradient(ellipse 75% 70% at 50% 45%, black 20%, transparent 75%);
            -webkit-mask-image: radial-gradient(ellipse 75% 70% at 50% 45%, black 20%, transparent 75%);
        }

        .hero-glow {
            position: absolute;
            top: -20%;
            right: -10%;
            width: 550px;
            height: 550px;
            background: radial-gradient(circle, rgba(255, 106, 43, 0.18) 0%, transparent 65%);
            z-index: -1;
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-glow-2 {
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 450px;
            height: 450px;
            background: radial-gradient(circle, rgba(255, 106, 43, 0.10) 0%, transparent 60%);
            z-index: -1;
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            width: 100%;
        }

        .hero-badge-row {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .explosion-badge {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px 7px 12px;
            border-radius: 999px;
            background: linear-gradient(135deg, rgba(255, 106, 43, 0.22) 0%, rgba(255, 106, 43, 0.12) 100%);
            border: 1px solid rgba(255, 106, 43, 0.40);
            font-size: 12.5px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.05em;
            box-shadow: 0 4px 16px rgba(255, 106, 43, 0.18);
        }

        .explosion-badge .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-primary);
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(255, 106, 43, 0.5); }
            50% { opacity: 0.6; box-shadow: 0 0 0 5px rgba(255, 106, 43, 0); }
        }

        .limit-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 12px;
            border-radius: 6px;
            background: rgba(255, 194, 75, 0.14);
            border: 1px solid rgba(255, 194, 75, 0.35);
            font-size: 11.5px;
            font-weight: 600;
            color: var(--color-warning);
            letter-spacing: 0.04em;
        }

        .hero-title {
            font-size: clamp(32px, 5.2vw, 56px);
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.02em;
            color: var(--color-text);
            margin-bottom: 18px;
        }

        .hero-title .highlight {
            color: var(--color-primary);
            position: relative;
            white-space: nowrap;
        }

        .hero-sub {
            font-size: clamp(15px, 1.6vw, 18px);
            font-weight: 400;
            color: var(--color-muted);
            max-width: 520px;
            line-height: 1.7;
            margin-bottom: 28px;
            letter-spacing: 0.01em;
        }

        .hero-cta-row {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 22px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            background: var(--color-primary);
            color: #0B0E11;
            letter-spacing: 0.03em;
            transition: all var(--transition-fast);
            box-shadow: 0 6px 24px rgba(255, 106, 43, 0.3);
            border: 1px solid transparent;
        }

        .btn-primary:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 8px 30px rgba(255, 106, 43, 0.45);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 4px 12px rgba(255, 106, 43, 0.25);
        }

        .btn-primary:focus-visible {
            outline: 4px solid rgba(255, 106, 43, 0.35);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            background: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-line-strong);
            letter-spacing: 0.03em;
            transition: all var(--transition-fast);
        }

        .btn-secondary:hover {
            border-color: rgba(255, 106, 43, 0.5);
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.06);
        }

        .btn-secondary:active {
            transform: scale(0.97);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid rgba(255, 106, 43, 0.3);
            outline-offset: 2px;
        }

        .hero-stats-mini {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .hero-stat-mini {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-muted);
        }

        .hero-stat-mini .num {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
        }

        .hero-stat-mini .label {
            font-size: 12px;
        }

        /* Hero 右侧数据看板预览 */
        .hero-preview-panel {
            background: rgba(18, 23, 29, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .hero-preview-panel::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -30%;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(255, 106, 43, 0.12) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .preview-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .preview-header .title {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-muted);
            letter-spacing: 0.04em;
        }

        .preview-header .live-indicator {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 11px;
            font-weight: 500;
            color: var(--color-success);
        }

        .live-indicator .pulse {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-success);
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        .preview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            position: relative;
            z-index: 1;
        }

        .preview-item {
            background: rgba(23, 30, 38, 0.75);
            border: 1px solid var(--color-line);
            border-radius: 10px;
            padding: 13px 14px;
            transition: all var(--transition-fast);
        }

        .preview-item:hover {
            border-color: rgba(255, 106, 43, 0.35);
            background: rgba(23, 30, 38, 0.9);
        }

        .preview-item .label {
            font-size: 11px;
            color: var(--color-muted-2);
            margin-bottom: 5px;
            letter-spacing: 0.03em;
        }

        .preview-item .value {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text);
        }

        .preview-item .trend {
            font-size: 11px;
            font-weight: 600;
            margin-top: 4px;
        }

        .trend.up { color: var(--color-success); }
        .trend.warn { color: var(--color-warning); }

        .preview-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 14px;
            padding-top: 12px;
            border-top: 1px solid var(--color-line);
            position: relative;
            z-index: 1;
        }

        .preview-footer span {
            font-size: 11.5px;
            color: var(--color-muted-2);
        }

        .preview-footer .click-hint {
            font-size: 11px;
            color: var(--color-primary);
            font-weight: 500;
        }

        /* ===== 通用 section ===== */
        .section {
            padding: 80px 0;
            position: relative;
        }

        @media (max-width: 1023px) {
            .section { padding: 56px 0; }
        }

        @media (max-width: 767px) {
            .section { padding: 40px 0; }
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-tag::before {
            content: '';
            width: 14px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 1px;
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.015em;
            color: var(--color-text);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-muted);
            max-width: 640px;
            margin-bottom: 36px;
        }

        /* ===== 指标看板 ===== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        @media (max-width: 1023px) {
            .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
        }

        @media (max-width: 520px) {
            .metrics-grid { grid-template-columns: 1fr; gap: 12px; }
        }

        .metric-card {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .metric-card:hover {
            border-color: rgba(255, 106, 43, 0.35);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .metric-card:hover::before { opacity: 1; }

        .metric-value {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 30px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .metric-label {
            font-size: 13px;
            color: var(--color-muted);
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        .metric-trend {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            font-weight: 600;
        }

        .metric-trend svg {
            width: 12px;
            height: 12px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2.2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .trend-up { color: var(--color-success); }
        .trend-warn { color: var(--color-warning); }

        /* ===== 服务矩阵 ===== */
        .service-matrix-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 28px;
            align-items: stretch;
        }

        @media (max-width: 1023px) {
            .service-matrix-grid { grid-template-columns: 1fr; gap: 20px; }
        }

        .service-image-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-line);
            min-height: 320px;
            background: var(--color-surface);
            box-shadow: var(--shadow-card);
        }

        .service-image-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.8;
            transition: opacity var(--transition-base), transform var(--transition-slow);
            min-height: 320px;
        }

        .service-image-card:hover img {
            opacity: 0.95;
            transform: scale(1.03);
        }

        .service-image-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,14,17,0.1) 0%, rgba(11,14,17,0.75) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 20px;
        }

        .service-image-card .overlay-tag {
            font-size: 11px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }

        .service-image-card .overlay-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
        }

        .service-image-card .overlay-desc {
            font-size: 13px;
            color: rgba(244, 247, 250, 0.8);
            line-height: 1.6;
        }

        .service-items-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        @media (max-width: 640px) {
            .service-items-grid { grid-template-columns: 1fr; gap: 12px; }
        }

        .service-item {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 20px 18px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .service-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            bottom: 0;
            width: 3px;
            background: var(--color-primary);
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .service-item:hover {
            border-color: rgba(255, 106, 43, 0.35);
            box-shadow: var(--shadow-card-hover);
        }

        .service-item:hover::before { opacity: 1; }

        .service-item-number {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }

        .service-item-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
            line-height: 1.4;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .service-item-title .arrow {
            display: inline-block;
            color: var(--color-primary);
            font-size: 14px;
            transition: transform var(--transition-fast);
        }

        .service-item:hover .arrow {
            transform: translateX(5px);
        }

        .service-item-desc {
            font-size: 13.5px;
            color: var(--color-muted);
            line-height: 1.75;
        }

        /* ===== 品牌介绍 ===== */
        .brand-intro-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
            border-bottom: 1px solid var(--color-line);
        }

        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        @media (max-width: 1023px) {
            .brand-intro-grid { grid-template-columns: 1fr; gap: 24px; }
        }

        .brand-intro-text {
            font-size: 15.5px;
            line-height: 2;
            color: var(--color-muted);
            max-width: 70ch;
        }

        .brand-intro-text strong {
            color: var(--color-text);
            font-weight: 600;
        }

        .brand-intro-text .brand-name {
            color: var(--color-primary);
            font-weight: 700;
        }

        .brand-highlight-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .brand-highlight-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            background: var(--color-surface-2);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }

        .brand-highlight-item:hover {
            border-color: rgba(255, 106, 43, 0.3);
            background: var(--color-surface-3);
        }

        .brand-highlight-item .icon-box {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: rgba(255, 106, 43, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 16px;
        }

        .brand-highlight-item span {
            font-size: 13.5px;
            color: var(--color-muted);
            line-height: 1.6;
        }

        .brand-highlight-item span strong {
            display: block;
            font-size: 14px;
            color: var(--color-text);
            font-weight: 600;
            margin-bottom: 2px;
        }

        /* ===== 结果对比 ===== */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        @media (max-width: 767px) {
            .comparison-grid { grid-template-columns: 1fr; gap: 16px; }
        }

        .compare-panel {
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-line);
            padding: 24px 20px;
            background: var(--color-surface);
            transition: all var(--transition-base);
        }

        .compare-panel:hover {
            border-color: var(--color-line-strong);
        }

        .compare-panel.negative {
            background: rgba(28, 32, 40, 0.8);
        }

        .compare-panel.positive {
            background: rgba(18, 23, 29, 0.9);
            border-color: rgba(255, 106, 43, 0.25);
        }

        .compare-panel.positive:hover {
            border-color: rgba(255, 106, 43, 0.45);
            box-shadow: var(--shadow-card-hover);
        }

        .compare-panel-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 18px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
        }

        .compare-panel-header .badge-ico {
            width: 26px;
            height: 26px;
            border-radius: 7px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
        }

        .badge-ico.negative-badge {
            background: rgba(255, 92, 92, 0.12);
            color: var(--color-danger);
        }

        .badge-ico.positive-badge {
            background: rgba(46, 229, 157, 0.12);
            color: var(--color-success);
        }

        .compare-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.7;
        }

        .compare-list li .check,
        .compare-list li .cross {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .compare-list li .check {
            background: rgba(46, 229, 157, 0.15);
            color: var(--color-success);
        }

        .compare-list li .cross {
            background: rgba(255, 92, 92, 0.12);
            color: var(--color-danger);
        }

        .compare-bar-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--color-line);
        }

        .compare-bar-label {
            font-size: 12px;
            color: var(--color-muted-2);
            min-width: 70px;
            white-space: nowrap;
        }

        .compare-bar-track {
            flex: 1;
            height: 8px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 4px;
            overflow: hidden;
        }

        .compare-bar-fill {
            height: 100%;
            border-radius: 4px;
            transition: width var(--transition-slow);
        }

        .compare-bar-fill.bar-negative {
            background: #3A4655;
            width: 46%;
        }

        .compare-bar-fill.bar-positive {
            background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
            width: 93%;
        }

        .compare-bar-pct {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-text);
            min-width: 40px;
            text-align: right;
        }

        /* ===== 内容预告 ===== */
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        @media (max-width: 1023px) {
            .timeline-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 640px) {
            .timeline-grid { grid-template-columns: 1fr; }
        }

        .timeline-card {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: all var(--transition-base);
            position: relative;
        }

        .timeline-card:hover {
            border-color: rgba(255, 106, 43, 0.35);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .timeline-card .date-tag {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }

        .timeline-card .timeline-title {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .timeline-card .timeline-desc {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.7;
        }

        .timeline-card .timeline-status {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 11px;
            font-weight: 600;
            margin-top: 10px;
            padding: 3px 10px;
            border-radius: 5px;
        }

        .status-upcoming { background: rgba(255, 194, 75, 0.12); color: var(--color-warning); }
        .status-live { background: rgba(46, 229, 157, 0.12); color: var(--color-success); }

        /* ===== 支持者墙/用户口碑 ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        @media (max-width: 1023px) {
            .testimonial-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 640px) {
            .testimonial-grid { grid-template-columns: 1fr; }
        }

        .testimonial-card {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: all var(--transition-base);
        }

        .testimonial-card:hover {
            border-color: rgba(255, 106, 43, 0.3);
            box-shadow: var(--shadow-card-hover);
        }

        .testimonial-quote {
            font-size: 13.5px;
            color: var(--color-muted);
            line-height: 1.8;
            margin-bottom: 14px;
            position: relative;
            padding-left: 14px;
        }

        .testimonial-quote::before {
            content: open-quote;
            font-size: 28px;
            font-weight: 700;
            color: var(--color-primary);
            position: absolute;
            left: -2px;
            top: -8px;
            font-family: Georgia, serif;
            line-height: 1;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .testimonial-avatar {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-surface-3), var(--color-surface-2));
            border: 1px solid var(--color-line-strong);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .testimonial-author-info span {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
        }

        .testimonial-author-info small {
            font-size: 11px;
            color: var(--color-muted-2);
        }

        /* ===== 资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 30px;
            align-items: start;
        }

        @media (max-width: 1023px) {
            .news-grid { grid-template-columns: 1fr; gap: 24px; }
        }

        .news-list-main {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .news-list-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 15px 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-line);
            background: var(--color-surface);
            transition: all var(--transition-fast);
        }

        .news-list-item:hover {
            border-color: rgba(255, 106, 43, 0.3);
            background: var(--color-surface-2);
        }

        .news-list-item .news-index {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-primary);
            min-width: 28px;
            text-align: center;
        }

        .news-list-item .news-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            line-height: 1.5;
            flex: 1;
            transition: color var(--transition-fast);
        }

        .news-list-item:hover .news-link {
            color: var(--color-primary);
        }

        .news-list-item .news-date {
            font-family: var(--font-mono);
            font-feature-settings: 'tnum' 1;
            font-size: 12px;
            color: var(--color-muted-2);
            white-space: nowrap;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-recommend-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-line);
            min-height: 180px;
            background: var(--color-surface);
        }

        .news-recommend-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 180px;
            opacity: 0.7;
            transition: opacity var(--transition-base), transform var(--transition-slow);
        }

        .news-recommend-card:hover img {
            opacity: 0.9;
            transform: scale(1.04);
        }

        .news-recommend-card .rec-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,14,17,0.2) 0%, rgba(11,14,17,0.85) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 16px;
        }

        .news-recommend-card .rec-tag {
            font-size: 10.5px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 4px;
        }

        .news-recommend-card .rec-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-top: 1px solid var(--color-line);
            transition: border-color var(--transition-fast);
        }

        .faq-item:last-child {
            border-bottom: 1px solid var(--color-line);
        }

        .faq-item:hover {
            border-top-color: rgba(255, 106, 43, 0.4);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 17px 4px;
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            transition: color var(--transition-fast);
            text-align: left;
            width: 100%;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-question .faq-icon {
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            position: relative;
            transition: transform var(--transition-base);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            background: var(--color-muted);
            border-radius: 1px;
            transition: background var(--transition-fast), transform var(--transition-base);
        }

        .faq-icon::before {
            width: 12px;
            height: 1.8px;
            transform: translate(-50%, -50%);
        }

        .faq-icon::after {
            width: 1.8px;
            height: 12px;
            transform: translate(-50%, -50%);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item.active .faq-icon::before,
        .faq-item.active .faq-icon::after {
            background: var(--color-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
            padding-left: 4px;
        }

        .faq-answer p {
            font-size: 14.5px;
            color: var(--color-muted);
            line-height: 1.85;
            padding-bottom: 16px;
            max-width: 70ch;
        }

        /* ===== 转化表单 CTA ===== */
        .cta-section {
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            background-color: #0B0E11;
            padding: 70px 0;
            isolation: isolate;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 14, 17, 0.88);
            z-index: -2;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 48px 48px;
            z-index: -1;
            opacity: 0.5;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        @media (max-width: 1023px) {
            .cta-grid { grid-template-columns: 1fr; gap: 28px; }
        }

        .cta-left .section-tag {
            color: var(--color-primary);
        }

        .cta-left .section-title {
            margin-bottom: 16px;
        }

        .cta-left p {
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.85;
            margin-bottom: 20px;
            max-width: 520px;
        }

        .trust-points {
            display: flex;
            flex-direction: column;
            gap: 10px;
            list-style: none;
        }

        .trust-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13.5px;
            color: var(--color-muted);
        }

        .trust-points li .trust-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(46, 229, 157, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 11px;
            font-weight: 700;
            color: var(--color-success);
        }

        .form-card {
            background: rgba(18, 23, 29, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--color-line-strong);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            box-shadow: var(--shadow-card);
        }

        .form-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 18px;
            letter-spacing: 0.01em;
        }

        .form-group {
            margin-bottom: 14px;
        }

        .form-label {
            display: block;
            font-size: 12.5px;
            font-weight: 500;
            color: var(--color-muted);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }

        .form-input,
        .form-select,
        .form-textarea {
            width: 100%;
            padding: 11px 14px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-line);
            color: var(--color-text);
            font-size: 14px;
            transition: all var(--transition-fast);
            -webkit-appearance: none;
            appearance: none;
        }

        .form-input::placeholder,
        .form-textarea::placeholder {
            color: var(--color-muted-2);
        }

        .form-input:hover,
        .form-select:hover,
        .form-textarea:hover {
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.07);
        }

        .form-input:focus,
        .form-select:focus,
        .form-textarea:focus {
            border-color: rgba(255, 106, 43, 0.55);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.18);
            outline: none;
        }

        .form-select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23AAB4BF' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 34px;
            cursor: pointer;
        }

        .form-select option {
            background: var(--color-surface-2);
            color: var(--color-text);
        }

        .form-textarea {
            resize: vertical;
            min-height: 72px;
            line-height: 1.6;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        @media (max-width: 640px) {
            .form-row { grid-template-columns: 1fr; }
        }

        .form-submit-btn {
            width: 100%;
            padding: 13px 20px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            background: var(--color-primary);
            color: #0B0E11;
            letter-spacing: 0.04em;
            transition: all var(--transition-fast);
            box-shadow: 0 6px 24px rgba(255, 106, 43, 0.3);
            border: 1px solid transparent;
            margin-top: 4px;
        }

        .form-submit-btn:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 8px 32px rgba(255, 106, 43, 0.45);
            transform: translateY(-1px);
        }

        .form-submit-btn:active {
            transform: scale(0.98);
        }

        .form-submit-btn:focus-visible {
            outline: 4px solid rgba(255, 106, 43, 0.35);
            outline-offset: 2px;
        }

        .form-hint {
            font-size: 11px;
            color: var(--color-muted-2);
            text-align: center;
            margin-top: 10px;
            letter-spacing: 0.02em;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #080A0D;
            border-top: 1px solid var(--color-line);
            padding: 48px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 36px;
        }

        @media (max-width: 1023px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
        }

        @media (max-width: 640px) {
            .footer-grid { grid-template-columns: 1fr; gap: 20px; }
        }

        .footer-brand .logo-link {
            margin-bottom: 12px;
            font-size: 18px;
        }

        .footer-brand .logo-mark {
            width: 30px;
            height: 30px;
            border-radius: 7px;
            font-size: 13px;
        }

        .footer-brand .logo-text strong {
            font-size: 17px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.75;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 12px;
            letter-spacing: 0.05em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-col ul a {
            font-size: 13px;
            color: var(--color-muted);
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .footer-col ul a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-line);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
        }

        .footer-copyright {
            font-size: 12px;
            color: var(--color-muted-2);
            line-height: 1.7;
        }

        .footer-copyright a {
            color: var(--color-muted);
            text-decoration: underline;
            text-underline-offset: 2px;
            transition: color var(--transition-fast);
        }

        .footer-copyright a:hover {
            color: var(--color-primary);
        }

        .footer-links-bottom {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 12px;
        }

        .footer-links-bottom a {
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }

        .footer-links-bottom a:hover {
            color: var(--color-primary);
        }

        @media (max-width: 640px) {
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        /* ===== 通知横幅 ===== */
        .notice-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            background: rgba(255, 106, 43, 0.08);
            border: 1px solid rgba(255, 106, 43, 0.22);
            border-radius: 10px;
            font-size: 12.5px;
            color: var(--color-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .notice-bar strong {
            color: var(--color-primary);
            font-weight: 600;
            white-space: nowrap;
        }

        /* ===== 响应式修正 ===== */
        @media (max-width: 1023px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-section {
                padding-top: 90px;
                padding-bottom: 48px;
                min-height: auto;
            }
            .hero-preview-panel {
                max-width: 520px;
            }
        }

        @media (max-width: 640px) {
            .hero-title {
                font-size: clamp(28px, 8vw, 38px);
            }
            .hero-sub {
                font-size: 14.5px;
            }
            .hero-cta-row {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-cta-row .btn-primary,
            .hero-cta-row .btn-secondary {
                justify-content: center;
                width: 100%;
            }
            .preview-grid {
                grid-template-columns: 1fr 1fr;
            }
            .preview-item .value {
                font-size: 20px;
            }
            .metric-value {
                font-size: 24px;
            }
        }

/* roulang page: category1 */
:root {
            --color-bg: #0B0E11;
            --color-surface: #12171D;
            --color-surface-2: #171E26;
            --color-surface-3: #1C242E;
            --color-primary: #FF6A2B;
            --color-primary-hover: #FF8145;
            --color-primary-glow: rgba(255, 106, 43, 0.35);
            --color-text: #F4F7FA;
            --color-muted: #AAB4BF;
            --color-muted-2: #8A95A1;
            --color-line: rgba(255, 255, 255, 0.10);
            --color-line-strong: rgba(255, 255, 255, 0.16);
            --color-success: #2EE59D;
            --color-warning: #FFC24B;
            --color-danger: #FF5C5C;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.28);
            --shadow-card-hover: 0 16px 50px rgba(255, 106, 43, 0.15), 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 24px rgba(0, 0, 0, 0.35);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container-wide {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 14, 17, 0.55);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(11, 14, 17, 0.95);
            backdrop-filter: blur(24px) saturate(1.5);
            -webkit-backdrop-filter: blur(24px) saturate(1.5);
            border-bottom-color: var(--color-line-strong);
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.02em;
            color: var(--color-text);
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            opacity: 0.85;
        }

        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #D84A1A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            color: #0B0E11;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(255, 106, 43, 0.35);
            flex-shrink: 0;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .logo-text small {
            font-size: 10px;
            font-weight: 400;
            color: var(--color-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .nav-links a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.12);
        }

        .nav-cta {
            padding: 10px 18px;
            font-size: 14px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 4px 16px rgba(255, 106, 43, 0.3);
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 6px 20px rgba(255, 106, 43, 0.45);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: scale(0.98);
        }

        .nav-search {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            border-radius: 8px;
            transition: color var(--transition-fast), background var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-search:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            width: 32px;
            height: 32px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            border: 1px solid var(--color-line);
            background: var(--color-surface);
            flex-shrink: 0;
        }

        .hamburger span {
            display: block;
            width: 16px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        /* ===== 低高度 Hero ===== */
        .category-hero {
            position: relative;
            padding-top: 130px;
            padding-bottom: 64px;
            background-image: linear-gradient(180deg, rgba(11, 14, 17, 0.65) 0%, rgba(11, 14, 17, 0.88) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid var(--color-line);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(255, 106, 43, 0.15) 0%, transparent 60%);
            pointer-events: none;
            z-index: 0;
        }

        .category-hero .container-wide {
            position: relative;
            z-index: 1;
        }

        .category-hero-content {
            max-width: 780px;
        }

        .category-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.12);
            border: 1px solid rgba(255, 106, 43, 0.25);
            border-radius: 20px;
            margin-bottom: 18px;
            letter-spacing: 0.06em;
        }

        .category-hero h1 {
            font-size: clamp(32px, 5.5vw, 52px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: 0.01em;
            margin-bottom: 18px;
        }

        .category-hero h1 .highlight {
            color: var(--color-primary);
        }

        .category-hero p {
            font-size: 16.5px;
            line-height: 1.9;
            color: var(--color-muted);
            max-width: 600px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 4px 20px rgba(255, 106, 43, 0.3);
        }

        .btn-primary:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 8px 28px rgba(255, 106, 43, 0.45);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            border: 1px solid var(--color-line-strong);
            border-radius: 10px;
            transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
        }

        .btn-secondary:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.08);
        }

        /* ===== 指标横条 ===== */
        .metrics-strip {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-line);
            padding: 28px 0;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .metric-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 22px;
            background: var(--color-surface-2);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        .metric-item:hover {
            border-color: rgba(255, 106, 43, 0.35);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .metric-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 106, 43, 0.12);
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .metric-info {
            flex: 1;
            min-width: 0;
        }

        .metric-value {
            font-family: var(--font-mono);
            font-size: 30px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: 0.01em;
            font-feature-settings: "tnum" 1;
        }

        .metric-label {
            font-size: 13.5px;
            color: var(--color-muted);
        }

        .metric-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
            flex-shrink: 0;
        }

        .metric-trend.up {
            color: var(--color-success);
            background: rgba(46, 229, 157, 0.1);
        }

        .metric-trend.warn {
            color: var(--color-warning);
            background: rgba(255, 194, 75, 0.1);
        }

        /* ===== 不对称卡片列表 ===== */
        .data-service-section {
            padding: 72px 0;
            background: var(--color-bg);
        }

        .section-heading {
            margin-bottom: 36px;
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: 0.01em;
            margin-bottom: 10px;
        }

        .section-heading p {
            font-size: 15px;
            color: var(--color-muted);
            max-width: 650px;
        }

        .asymmetric-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .asym-row {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 16px;
        }

        .asym-row.reverse {
            grid-template-columns: 1fr 1fr 1.4fr;
        }

        .asym-card {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            position: relative;
            overflow: hidden;
        }

        .asym-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--color-primary);
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .asym-card:hover {
            border-color: rgba(255, 106, 43, 0.35);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .asym-card:hover::before {
            opacity: 1;
        }

        .asym-card.large {
            padding: 28px 26px;
        }

        .asym-card .card-number {
            font-family: var(--font-mono);
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.08em;
            margin-bottom: 14px;
            display: block;
        }

        .asym-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .asym-card p {
            font-size: 14.5px;
            color: var(--color-muted);
            line-height: 1.8;
        }

        .asym-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 14px;
            flex-wrap: wrap;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-muted);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-line);
            border-radius: 6px;
            letter-spacing: 0.02em;
        }

        .tag.orange {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.1);
            border-color: rgba(255, 106, 43, 0.25);
        }

        /* ===== 深度内容区域 ===== */
        .deep-content {
            padding: 72px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
            border-bottom: 1px solid var(--color-line);
        }

        .deep-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .deep-text h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
        }

        .deep-text p {
            font-size: 15.5px;
            color: var(--color-muted);
            line-height: 2;
            margin-bottom: 16px;
        }

        .deep-text .highlight-text {
            color: var(--color-text);
            font-weight: 500;
        }

        .deep-image-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-line);
            box-shadow: var(--shadow-card);
        }

        .deep-image-card img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .deep-image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 17, 0.1) 0%, rgba(11, 14, 17, 0.7) 100%);
            display: flex;
            align-items: flex-end;
            padding: 22px;
        }

        .deep-image-overlay span {
            font-size: 14px;
            color: var(--color-text);
            font-weight: 500;
            letter-spacing: 0.04em;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 72px 0;
            background: var(--color-bg);
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            border-top: 1px solid var(--color-line);
        }

        .faq-item {
            border-bottom: 1px solid var(--color-line);
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-bottom-color: rgba(255, 106, 43, 0.35);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 8px;
            text-align: left;
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            transition: color var(--transition-fast);
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            transition: transform var(--transition-fast), color var(--transition-fast);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--color-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 8px;
        }

        .faq-item.open .faq-answer {
            max-height: 240px;
            padding-bottom: 18px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.9;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            background: var(--color-bg);
        }

        .cta-panel {
            background: var(--color-surface-2);
            border: 1px solid var(--color-line-strong);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(255, 106, 43, 0.12) 0%, transparent 55%);
            pointer-events: none;
        }

        .cta-panel-left {
            position: relative;
            z-index: 1;
        }

        .cta-panel-left h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
        }

        .cta-panel-left p {
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 500px;
        }

        .trust-points {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .trust-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--color-muted);
        }

        .trust-points li .check {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(46, 229, 157, 0.12);
            color: var(--color-success);
            flex-shrink: 0;
            font-size: 12px;
        }

        .cta-panel-right {
            position: relative;
            z-index: 1;
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
        }

        .cta-panel-right h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 18px;
        }

        .form-group {
            margin-bottom: 14px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-muted);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 11px 14px;
            font-size: 14.5px;
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-line);
            border-radius: 8px;
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--color-primary);
            background: rgba(255, 106, 43, 0.04);
            box-shadow: 0 0 0 3px rgba(255, 106, 43, 0.25);
        }

        .form-group textarea {
            min-height: 70px;
            resize: vertical;
        }

        .form-submit {
            width: 100%;
            padding: 13px 20px;
            font-size: 15px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 4px 20px rgba(255, 106, 43, 0.3);
            margin-top: 6px;
        }

        .form-submit:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 8px 28px rgba(255, 106, 43, 0.45);
            transform: translateY(-2px);
        }

        .form-submit:active {
            transform: scale(0.98);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .logo-link {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.8;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }

        .footer-col ul a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-line);
            padding-top: 20px;
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-copyright {
            font-size: 13px;
            color: var(--color-muted-2);
            line-height: 1.8;
        }

        .footer-copyright a {
            color: var(--color-muted);
        }

        .footer-copyright a:hover {
            color: var(--color-primary);
        }

        .footer-links-bottom {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: var(--color-muted-2);
        }

        .footer-links-bottom a {
            color: var(--color-muted-2);
            transition: color var(--transition-fast);
        }

        .footer-links-bottom a:hover {
            color: var(--color-primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .deep-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-panel {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .container-wide {
                padding-left: 18px;
                padding-right: 18px;
            }
            .header-inner {
                height: 58px;
            }
            .category-hero {
                padding-top: 110px;
                padding-bottom: 44px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .asym-row,
            .asym-row.reverse {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .asym-card.large {
                padding: 22px 20px;
            }
            .asym-card {
                padding: 20px 18px;
            }
            .section-heading h2 {
                font-size: 24px;
            }
            .deep-text h2 {
                font-size: 22px;
            }
            .cta-panel {
                padding: 28px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container-wide {
                padding-left: 14px;
                padding-right: 14px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .metric-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .metric-value {
                font-size: 26px;
            }
            .deep-image-card img {
                height: 220px;
            }
            .faq-question {
                font-size: 15.5px;
                padding: 14px 4px;
            }
        }

        /* ===== 移动端导航抽屉 ===== */
        .mobile-menu {
            position: fixed;
            top: 58px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(11, 14, 17, 0.97);
            backdrop-filter: blur(20px);
            z-index: 99;
            display: flex;
            flex-direction: column;
            padding: 20px 18px;
            gap: 6px;
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-base), transform var(--transition-base);
        }

        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }

        .mobile-menu a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--color-text);
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: 10px;
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            border-color: rgba(255, 106, 43, 0.35);
            background: rgba(255, 106, 43, 0.08);
            color: var(--color-primary);
        }

        .mobile-menu .mobile-cta {
            margin-top: 12px;
            background: var(--color-primary);
            color: #0B0E11;
            font-weight: 600;
            justify-content: center;
            border-color: var(--color-primary);
        }

        .mobile-menu .mobile-cta:hover {
            background: var(--color-primary-hover);
            color: #0B0E11;
        }

/* roulang page: category2 */
:root {
            --color-bg: #0B0E11;
            --color-surface: #12171D;
            --color-surface-2: #171E26;
            --color-surface-3: #1C242E;
            --color-primary: #FF6A2B;
            --color-primary-hover: #FF8145;
            --color-primary-glow: rgba(255, 106, 43, 0.35);
            --color-text: #F4F7FA;
            --color-muted: #AAB4BF;
            --color-muted-2: #8A95A1;
            --color-line: rgba(255, 255, 255, 0.10);
            --color-line-strong: rgba(255, 255, 255, 0.16);
            --color-success: #2EE59D;
            --color-warning: #FFC24B;
            --color-danger: #FF5C5C;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.28);
            --shadow-card-hover: 0 16px 50px rgba(255, 106, 43, 0.15), 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 24px rgba(0, 0, 0, 0.35);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-color: var(--color-bg);
        }
        body {
            font-family: var(--font-sans);
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        .container-wide {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 28px;
            padding-right: 28px;
        }
        @media (max-width: 1024px) {
            .container-wide {
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        @media (max-width: 768px) {
            .container-wide {
                padding-left: 18px;
                padding-right: 18px;
            }
        }
        @media (max-width: 520px) {
            .container-wide {
                padding-left: 14px;
                padding-right: 14px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 14, 17, 0.55);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(11, 14, 17, 0.95);
            backdrop-filter: blur(24px) saturate(1.5);
            -webkit-backdrop-filter: blur(24px) saturate(1.5);
            border-bottom-color: var(--color-line-strong);
            box-shadow: var(--shadow-nav);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.02em;
            color: var(--color-text);
            transition: opacity var(--transition-fast);
        }
        .logo-link:hover {
            opacity: 0.85;
        }
        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #D84A1A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            color: #0B0E11;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(255, 106, 43, 0.35);
            flex-shrink: 0;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .logo-text strong {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }
        .logo-text small {
            font-size: 10px;
            font-weight: 400;
            color: var(--color-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
        }
        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.10);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-search-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 8px;
            color: var(--color-muted);
            border: 1px solid var(--color-line);
            transition: all var(--transition-fast);
            background: rgba(255, 255, 255, 0.03);
        }
        .nav-search-btn:hover {
            color: var(--color-text);
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-cta {
            padding: 9px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(255, 106, 43, 0.30);
        }
        .nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(255, 106, 43, 0.40);
        }
        .nav-cta:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        .mobile-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid var(--color-line);
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
            transition: all var(--transition-fast);
        }
        .mobile-toggle:hover {
            border-color: var(--color-line-strong);
        }
        .mobile-toggle svg {
            width: 20px;
            height: 20px;
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 20px;
                background: rgba(11, 14, 17, 0.97);
                border-bottom: 1px solid var(--color-line-strong);
                box-shadow: var(--shadow-nav);
                gap: 4px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                font-size: 15px;
            }
            .mobile-toggle {
                display: flex;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                height: 60px;
            }
            .nav-links {
                top: 60px;
            }
            .logo-text strong {
                font-size: 17px;
            }
            .nav-cta {
                padding: 7px 12px;
                font-size: 12px;
            }
        }

        /* ===== 内页 Hero ===== */
        .page-hero {
            position: relative;
            padding: 140px 0 70px;
            background: linear-gradient(180deg, rgba(11, 14, 17, 0.88) 0%, var(--color-bg) 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 17, 0.65) 0%, var(--color-bg) 95%);
            pointer-events: none;
        }
        .page-hero .container-wide {
            position: relative;
            z-index: 2;
        }
        .page-hero-grid {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 48px;
            align-items: end;
        }
        .page-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.10);
            border: 1px solid rgba(255, 106, 43, 0.25);
            margin-bottom: 18px;
            letter-spacing: 0.04em;
        }
        .page-hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-success);
            box-shadow: 0 0 8px var(--color-success);
        }
        .page-hero h1 {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin: 0 0 16px;
            color: var(--color-text);
        }
        .page-hero .hero-subtitle {
            font-size: 17px;
            color: var(--color-muted);
            max-width: 560px;
            line-height: 1.8;
            margin: 0;
        }
        .page-hero-stats {
            display: flex;
            gap: 32px;
            flex-shrink: 0;
        }
        .page-hero-stat {
            text-align: right;
        }
        .page-hero-stat .stat-value {
            font-family: var(--font-mono);
            font-size: 30px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.2;
            font-feature-settings: 'tnum' 1;
        }
        .page-hero-stat .stat-label {
            font-size: 12px;
            color: var(--color-muted-2);
            letter-spacing: 0.06em;
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 110px 0 50px;
            }
            .page-hero-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-hero-stats {
                justify-content: flex-start;
            }
            .page-hero-stat {
                text-align: left;
            }
        }

        /* ===== 主体布局 ===== */
        .main-layout {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 36px;
            padding: 50px 0 90px;
            align-items: start;
        }
        @media (max-width: 1024px) {
            .main-layout {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 30px 0 60px;
            }
        }

        /* ===== 粘性筛选面板 ===== */
        .filter-panel {
            position: sticky;
            top: 88px;
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .filter-panel:hover {
            border-color: var(--color-line-strong);
        }
        .filter-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--color-line);
        }
        .filter-panel-header h2 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0;
            letter-spacing: 0.02em;
        }
        .filter-reset {
            font-size: 12px;
            color: var(--color-muted-2);
            transition: color var(--transition-fast);
            padding: 4px 8px;
            border-radius: 6px;
        }
        .filter-reset:hover {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.08);
        }
        .filter-group {
            margin-bottom: 22px;
        }
        .filter-group:last-child {
            margin-bottom: 0;
        }
        .filter-group-label {
            font-size: 11px;
            font-weight: 600;
            color: var(--color-muted-2);
            letter-spacing: 0.10em;
            text-transform: uppercase;
            margin-bottom: 10px;
            display: block;
        }
        .filter-search-input {
            width: 100%;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: var(--color-surface-2);
            border: 1px solid var(--color-line);
            color: var(--color-text);
            font-size: 13px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .filter-search-input::placeholder {
            color: var(--color-muted-2);
        }
        .filter-search-input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.25);
        }
        .filter-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .filter-tag {
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-muted);
            background: var(--color-surface-2);
            border: 1px solid var(--color-line);
            transition: all var(--transition-fast);
            cursor: pointer;
            user-select: none;
            white-space: nowrap;
        }
        .filter-tag:hover {
            color: var(--color-text);
            border-color: var(--color-line-strong);
            background: var(--color-surface-3);
        }
        .filter-tag.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.12);
            border-color: rgba(255, 106, 43, 0.30);
        }
        .filter-select {
            width: 100%;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: var(--color-surface-2);
            border: 1px solid var(--color-line);
            color: var(--color-text);
            font-size: 13px;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23AAB4BF' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            cursor: pointer;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .filter-select:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.25);
        }
        .filter-select option {
            background: var(--color-surface-2);
            color: var(--color-text);
            padding: 8px;
        }
        @media (max-width: 1024px) {
            .filter-panel {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
                padding: 20px;
            }
            .filter-panel-header {
                grid-column: 1 / -1;
                margin-bottom: 0;
            }
            .filter-group {
                margin-bottom: 0;
            }
        }
        @media (max-width: 640px) {
            .filter-panel {
                grid-template-columns: 1fr;
                gap: 14px;
                padding: 16px;
            }
        }

        /* ===== 资料列表 ===== */
        .resource-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .resource-item {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 22px;
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .resource-item:hover {
            border-color: rgba(255, 106, 43, 0.35);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .resource-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: transparent;
            border-radius: 0 2px 2px 0;
            transition: background var(--transition-base);
        }
        .resource-item:hover::before {
            background: var(--color-primary);
        }
        .resource-item-thumb {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 16/10;
            background: var(--color-surface-2);
        }
        .resource-item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }
        .resource-item:hover .resource-item-thumb img {
            transform: scale(1.04);
        }
        .resource-item-thumb .thumb-tag {
            position: absolute;
            top: 10px;
            left: 10px;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 11px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            letter-spacing: 0.03em;
            z-index: 2;
        }
        .resource-item-body {
            display: flex;
            flex-direction: column;
            gap: 8px;
            min-width: 0;
        }
        .resource-item-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .resource-item-tag {
            padding: 3px 10px;
            border-radius: 9999px;
            font-size: 11px;
            font-weight: 500;
            color: var(--color-muted);
            background: var(--color-surface-2);
            border: 1px solid var(--color-line);
            white-space: nowrap;
        }
        .resource-item-date {
            font-size: 12px;
            color: var(--color-muted-2);
            font-feature-settings: 'tnum' 1;
        }
        .resource-item-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin: 0;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
        }
        .resource-item:hover .resource-item-title {
            color: var(--color-primary);
        }
        .resource-item-excerpt {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.7;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .resource-item-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 10px;
            border-top: 1px solid var(--color-line);
            gap: 12px;
            flex-wrap: wrap;
        }
        .resource-item-stats {
            display: flex;
            gap: 16px;
            font-size: 12px;
            color: var(--color-muted-2);
            font-feature-settings: 'tnum' 1;
        }
        .resource-item-stats span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .resource-item-action {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            display: flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .resource-item-action:hover {
            color: var(--color-primary-hover);
            gap: 8px;
        }
        .resource-item-action svg {
            width: 14px;
            height: 14px;
            transition: transform var(--transition-fast);
        }
        .resource-item-action:hover svg {
            transform: translateX(2px);
        }
        @media (max-width: 768px) {
            .resource-item {
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 16px;
            }
            .resource-item-thumb {
                aspect-ratio: 16/9;
            }
        }
        @media (max-width: 520px) {
            .resource-item {
                padding: 14px;
            }
            .resource-item-title {
                font-size: 15px;
            }
            .resource-item-excerpt {
                font-size: 13px;
                -webkit-line-clamp: 2;
            }
        }
        .resource-empty {
            text-align: center;
            padding: 60px 20px;
            background: var(--color-surface);
            border: 1px dashed var(--color-line-strong);
            border-radius: var(--radius-lg);
            color: var(--color-muted);
            font-size: 15px;
        }
        .resource-empty strong {
            color: var(--color-text);
            display: block;
            font-size: 17px;
            margin-bottom: 6px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 70px 0 90px;
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
            border-bottom: 1px solid var(--color-line);
        }
        .faq-section .section-header {
            margin-bottom: 40px;
        }
        .section-header {
            max-width: 640px;
        }
        .section-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.12em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 12px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }
        .section-header p {
            font-size: 15px;
            color: var(--color-muted);
            margin: 0;
            line-height: 1.8;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 820px;
        }
        .faq-item {
            border-top: 1px solid var(--color-line);
            transition: border-color var(--transition-fast);
        }
        .faq-item:last-child {
            border-bottom: 1px solid var(--color-line);
        }
        .faq-item:hover {
            border-color: rgba(255, 106, 43, 0.35);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 4px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            text-align: left;
            transition: color var(--transition-fast);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--color-line);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-base);
            font-size: 18px;
            color: var(--color-muted);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.08);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 4px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 4px 18px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.85;
            margin: 0;
        }
        @media (max-width: 768px) {
            .faq-section {
                padding: 50px 0 60px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 2px;
            }
            .faq-answer p {
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-panel {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-xl);
            padding: 48px 56px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }
        .cta-panel::after {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 106, 43, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: center;
        }
        .cta-content h2 {
            font-size: clamp(22px, 2.5vw, 30px);
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 10px;
            letter-spacing: -0.01em;
        }
        .cta-content p {
            font-size: 15px;
            color: var(--color-muted);
            margin: 0 0 20px;
            line-height: 1.75;
            max-width: 480px;
        }
        .cta-trust-list {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .cta-trust-list li {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--color-muted);
        }
        .cta-trust-list li::before {
            content: '✓';
            color: var(--color-success);
            font-weight: 700;
            font-size: 14px;
        }
        .cta-buttons {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }
        .btn-primary {
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 6px 20px rgba(255, 106, 43, 0.30);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 106, 43, 0.42);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: 4px solid rgba(255, 106, 43, 0.35);
            outline-offset: 2px;
        }
        .btn-outline {
            padding: 12px 26px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            border: 1px solid var(--color-line-strong);
            transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: scale(0.98);
        }
        .btn-outline:focus-visible {
            outline: 4px solid rgba(255, 106, 43, 0.25);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 50px 0;
            }
            .cta-panel {
                padding: 32px 24px;
            }
            .cta-content {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cta-buttons {
                width: 100%;
            }
            .btn-primary,
            .btn-outline {
                flex: 1;
                justify-content: center;
                padding: 12px 18px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0A0C0F;
            border-top: 1px solid var(--color-line);
            padding: 56px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 42px;
        }
        .footer-brand .logo-link {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--color-muted-2);
            line-height: 1.8;
            margin: 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: 0.06em;
            margin: 0 0 16px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 13px;
            color: var(--color-muted-2);
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-line);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-copyright {
            font-size: 12px;
            color: var(--color-muted-2);
            line-height: 1.7;
        }
        .footer-copyright a {
            color: var(--color-muted);
        }
        .footer-copyright a:hover {
            color: var(--color-primary);
        }
        .footer-links-bottom {
            display: flex;
            gap: 18px;
            font-size: 12px;
        }
        .footer-links-bottom a {
            color: var(--color-muted-2);
            transition: color var(--transition-fast);
        }
        .footer-links-bottom a:hover {
            color: var(--color-primary);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 640px) {
            .site-footer {
                padding: 40px 0 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .footer-links-bottom {
                flex-wrap: wrap;
            }
        }

/* roulang page: category3 */
:root {
            --color-bg: #0B0E11;
            --color-surface: #12171D;
            --color-surface-2: #171E26;
            --color-surface-3: #1C242E;
            --color-primary: #FF6A2B;
            --color-primary-hover: #FF8145;
            --color-primary-glow: rgba(255, 106, 43, 0.35);
            --color-text: #F4F7FA;
            --color-muted: #AAB4BF;
            --color-muted-2: #8A95A1;
            --color-line: rgba(255, 255, 255, 0.10);
            --color-line-strong: rgba(255, 255, 255, 0.16);
            --color-success: #2EE59D;
            --color-warning: #FFC24B;
            --color-danger: #FF5C5C;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.28);
            --shadow-card-hover: 0 16px 50px rgba(255, 106, 43, 0.15), 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 24px rgba(0, 0, 0, 0.35);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
        }

        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .container-wide {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 28px;
            padding-right: 28px;
        }
        @media (max-width: 768px) {
            .container-wide {
                padding-left: 18px;
                padding-right: 18px;
            }
        }
        @media (max-width: 520px) {
            .container-wide {
                padding-left: 14px;
                padding-right: 14px;
            }
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 14, 17, 0.55);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(11, 14, 17, 0.95);
            backdrop-filter: blur(24px) saturate(1.5);
            -webkit-backdrop-filter: blur(24px) saturate(1.5);
            border-bottom-color: var(--color-line-strong);
            box-shadow: var(--shadow-nav);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.02em;
            color: var(--color-text);
            transition: opacity var(--transition-fast);
        }
        .logo-link:hover {
            opacity: 0.85;
        }
        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #D84A1A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            color: #0B0E11;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(255, 106, 43, 0.35);
            flex-shrink: 0;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .logo-text strong {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }
        .logo-text small {
            font-size: 10px;
            font-weight: 400;
            color: var(--color-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }
        .nav-links a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
        }
        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--color-text);
            background: rgba(255, 106, 43, 0.15);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .search-btn {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: var(--color-muted);
            font-size: 16px;
            transition: all var(--transition-fast);
            border: 1px solid var(--color-line);
            background: rgba(255, 255, 255, 0.05);
        }
        .search-btn:hover {
            color: var(--color-text);
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.1);
        }
        .btn-primary-hdr {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 10px;
            background: var(--color-primary);
            color: #0B0E11;
            transition: all var(--transition-fast);
            border: 1px solid var(--color-primary);
            white-space: nowrap;
        }
        .btn-primary-hdr:hover {
            background: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            box-shadow: 0 4px 16px rgba(255, 106, 43, 0.3);
        }
        .btn-primary-hdr:active {
            transform: scale(0.98);
        }
        .btn-primary-hdr:focus-visible {
            outline: 3px solid var(--color-primary-glow);
            outline-offset: 2px;
        }
        .hamburger-btn {
            display: none;
            width: 38px;
            height: 38px;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            border-radius: 10px;
            border: 1px solid var(--color-line);
            background: rgba(255, 255, 255, 0.05);
        }
        .hamburger-btn span {
            width: 18px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-fast);
            transform-origin: center;
        }
        .hamburger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(11, 14, 17, 0.98);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                border-bottom: 1px solid var(--color-line-strong);
                padding: 12px 20px 20px;
                gap: 4px;
                z-index: 99;
                box-shadow: var(--shadow-nav);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 14px;
                font-size: 15px;
                border-radius: 10px;
            }
            .nav-links a.active::after {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .header-actions .btn-primary-hdr {
                display: none;
            }
        }

        /* ===== 通用板块 ===== */
        .section-space {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-space {
                padding: 50px 0;
            }
        }
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 13px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.1);
            border: 1px solid rgba(255, 106, 43, 0.3);
            border-radius: 999px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: 0.01em;
            margin: 0 0 12px 0;
            color: var(--color-text);
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 22px;
            }
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--color-muted);
            line-height: 1.8;
            max-width: 70ch;
            margin: 0;
        }

        /* ===== Hero ===== */
        .hero-low {
            position: relative;
            min-height: 66vh;
            display: flex;
            align-items: center;
            padding-top: 68px;
            overflow: hidden;
            background: var(--color-bg);
        }
        .hero-low-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }
        .hero-low-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.4;
            filter: saturate(0.85);
        }
        .hero-low-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(180deg, rgba(11, 14, 17, 0.75) 0%, rgba(11, 14, 17, 0.45) 50%, rgba(11, 14, 17, 0.85) 100%);
        }
        .hero-low-overlay::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
            background-size: 42px 42px;
            opacity: 0.35;
        }
        .hero-low-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            padding: 36px 0 56px;
        }
        .hero-low-content h1 {
            font-size: clamp(32px, 4.5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.02em;
            margin: 0 0 18px 0;
            color: var(--color-text);
        }
        .hero-low-content h1 .highlight {
            color: var(--color-primary);
        }
        .hero-low-content p {
            font-size: 17px;
            line-height: 1.85;
            color: var(--color-muted);
            max-width: 600px;
            margin: 0 0 28px 0;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 700;
            border-radius: 10px;
            background: var(--color-primary);
            color: #0B0E11;
            border: 1px solid var(--color-primary);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            box-shadow: 0 8px 24px rgba(255, 106, 43, 0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--color-primary-glow);
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 10px;
            background: transparent;
            color: var(--color-text);
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }
        .btn-secondary:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.08);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid var(--color-primary-glow);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .hero-low {
                min-height: 56vh;
                padding-top: 60px;
            }
            .hero-low-content {
                padding: 20px 0 36px;
            }
            .hero-low-content p {
                font-size: 15px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 指标横条 ===== */
        .metric-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: -40px;
            position: relative;
            z-index: 5;
        }
        @media (max-width: 768px) {
            .metric-strip {
                grid-template-columns: 1fr;
                margin-top: -20px;
            }
        }
        .metric-strip-card {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .metric-strip-card:hover {
            border-color: rgba(255, 106, 43, 0.4);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .metric-strip-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            background: rgba(255, 106, 43, 0.12);
            color: var(--color-primary);
            border: 1px solid rgba(255, 106, 43, 0.25);
        }
        .metric-strip-info {
            flex: 1;
        }
        .metric-strip-value {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--color-text);
            font-feature-settings: "tnum";
        }
        .metric-strip-label {
            font-size: 13px;
            color: var(--color-muted);
            margin-top: 2px;
        }
        .metric-strip-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            font-family: var(--font-mono);
            font-feature-settings: "tnum";
        }
        .metric-strip-trend.up {
            color: var(--color-success);
        }
        .metric-strip-trend.down {
            color: var(--color-warning);
        }

        /* ===== 主体对比 ===== */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 32px;
        }
        @media (max-width: 900px) {
            .compare-grid {
                grid-template-columns: 1fr;
            }
        }
        .compare-panel {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-xl);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .compare-panel:hover {
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .compare-panel.winner {
            border-color: rgba(255, 106, 43, 0.4);
            background: linear-gradient(165deg, rgba(255, 106, 43, 0.06) 0%, var(--color-surface) 50%);
        }
        .compare-panel-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }
        .compare-panel-tag {
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 700;
            border-radius: 6px;
            letter-spacing: 0.04em;
        }
        .compare-panel-tag.before {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-muted);
            border: 1px solid var(--color-line);
        }
        .compare-panel-tag.after {
            background: rgba(255, 106, 43, 0.15);
            color: var(--color-primary);
            border: 1px solid rgba(255, 106, 43, 0.35);
        }
        .compare-panel-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
        }
        .compare-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .compare-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition-fast);
        }
        .compare-item:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.12);
        }
        .compare-item-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .compare-item-icon.cross {
            background: rgba(255, 92, 92, 0.15);
            color: var(--color-danger);
        }
        .compare-item-icon.check {
            background: rgba(46, 229, 157, 0.15);
            color: var(--color-success);
        }
        .compare-item-text {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
            flex: 1;
        }
        .compare-panel.winner .compare-item-text {
            color: var(--color-text);
        }
        .compare-item-value {
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            font-feature-settings: "tnum";
            color: var(--color-muted);
            white-space: nowrap;
        }
        .compare-panel.winner .compare-item-value {
            color: var(--color-primary);
        }
        .compare-bar {
            height: 6px;
            border-radius: 3px;
            background: rgba(255, 255, 255, 0.1);
            margin-top: 6px;
            overflow: hidden;
        }
        .compare-bar-fill {
            height: 100%;
            border-radius: 3px;
            transition: width 0.6s ease;
        }
        .compare-bar-fill.orange {
            background: var(--color-primary);
        }
        .compare-bar-fill.muted {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 信任引用 ===== */
        .quote-section {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-xl);
            padding: 60px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .quote-section::before {
            content: '"';
            position: absolute;
            top: 20px;
            left: 30px;
            font-size: 120px;
            font-weight: 800;
            font-family: var(--font-sans);
            color: rgba(255, 106, 43, 0.15);
            line-height: 1;
            pointer-events: none;
        }
        .quote-text {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.75;
            color: var(--color-text);
            max-width: 750px;
            margin: 0 auto 20px;
            letter-spacing: 0.02em;
        }
        .quote-author {
            font-size: 14px;
            color: var(--color-muted);
            letter-spacing: 0.06em;
        }
        .quote-author strong {
            color: var(--color-primary);
            font-weight: 700;
        }
        @media (max-width: 768px) {
            .quote-section {
                padding: 36px 22px;
            }
            .quote-text {
                font-size: 16px;
            }
        }

        /* ===== 深度对比区块 ===== */
        .depth-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 32px;
        }
        @media (max-width: 860px) {
            .depth-grid {
                grid-template-columns: 1fr;
            }
        }
        .depth-card {
            background: var(--color-surface-2);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .depth-card:hover {
            border-color: rgba(255, 106, 43, 0.4);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .depth-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--color-primary);
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .depth-card:hover::before {
            opacity: 1;
        }
        .depth-card-num {
            font-family: var(--font-mono);
            font-size: 12px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.1em;
            display: block;
            margin-bottom: 8px;
            font-feature-settings: "tnum";
        }
        .depth-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 8px 0;
        }
        .depth-card p {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.75;
            margin: 0;
        }
        .depth-card .depth-stat {
            display: flex;
            align-items: baseline;
            gap: 8px;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--color-line);
        }
        .depth-stat-value {
            font-family: var(--font-mono);
            font-size: 24px;
            font-weight: 700;
            color: var(--color-primary);
            font-feature-settings: "tnum";
        }
        .depth-stat-label {
            font-size: 13px;
            color: var(--color-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            margin-top: 28px;
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--color-line);
        }
        .faq-item {
            border-bottom: 1px solid var(--color-line);
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-bottom-color: rgba(255, 106, 43, 0.4);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 4px;
            cursor: pointer;
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            transition: color var(--transition-fast);
            width: 100%;
            text-align: left;
            background: none;
            border: none;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            font-size: 16px;
            color: var(--color-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 4px;
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.85;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 4px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
            background-image: linear-gradient(165deg, rgba(255, 106, 43, 0.08) 0%, rgba(11, 14, 17, 0) 60%);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 36px 36px;
            pointer-events: none;
            opacity: 0.4;
        }
        .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-content h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-text);
            margin: 0 0 12px 0;
            letter-spacing: 0.02em;
        }
        .cta-content p {
            font-size: 16px;
            color: var(--color-muted);
            max-width: 550px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-surface-2);
            border-top: 1px solid var(--color-line-strong);
            padding: 56px 0 28px;
            margin-top: 80px;
        }
        @media (max-width: 768px) {
            .site-footer {
                margin-top: 50px;
                padding: 40px 0 20px;
            }
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.8;
            margin: 14px 0 0 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 14px 0;
            letter-spacing: 0.04em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col a {
            font-size: 14px;
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-line);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        @media (max-width: 768px) {
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        .footer-copyright {
            font-size: 13px;
            color: var(--color-muted-2);
            line-height: 1.8;
        }
        .footer-copyright a {
            color: var(--color-muted);
        }
        .footer-copyright a:hover {
            color: var(--color-primary);
        }
        .footer-links-bottom {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
        }
        .footer-links-bottom a {
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }
        .footer-links-bottom a:hover {
            color: var(--color-primary);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 640px) {
            .compare-panel {
                padding: 24px 18px;
            }
            .depth-card {
                padding: 22px 18px;
            }
            .cta-section {
                padding: 40px 22px;
            }
            .hero-low-content h1 {
                font-size: 28px;
            }
            .section-badge {
                font-size: 11px;
            }
        }

/* roulang page: category4 */
:root {
            --color-bg: #0B0E11;
            --color-surface: #12171D;
            --color-surface-2: #171E26;
            --color-surface-3: #1C242E;
            --color-primary: #FF6A2B;
            --color-primary-hover: #FF8145;
            --color-primary-glow: rgba(255, 106, 43, 0.35);
            --color-text: #F4F7FA;
            --color-muted: #AAB4BF;
            --color-muted-2: #8A95A1;
            --color-line: rgba(255, 255, 255, 0.10);
            --color-line-strong: rgba(255, 255, 255, 0.16);
            --color-success: #2EE59D;
            --color-warning: #FFC24B;
            --color-danger: #FF5C5C;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.28);
            --shadow-card-hover: 0 16px 50px rgba(255, 106, 43, 0.15), 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 24px rgba(0, 0, 0, 0.35);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container-wide {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        /* 导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 14, 17, 0.55);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(11, 14, 17, 0.95);
            backdrop-filter: blur(24px) saturate(1.5);
            -webkit-backdrop-filter: blur(24px) saturate(1.5);
            border-bottom-color: var(--color-line-strong);
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.02em;
            color: var(--color-text);
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            opacity: 0.85;
        }

        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #D84A1A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            color: #0B0E11;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(255, 106, 43, 0.35);
            flex-shrink: 0;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .logo-text small {
            font-size: 10px;
            font-weight: 400;
            color: var(--color-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .nav-links a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.12);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-primary);
        }

        .nav-cta {
            padding: 9px 20px;
            background: var(--color-primary);
            color: #0B0E11;
            font-weight: 600;
            font-size: 13.5px;
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 4px 16px rgba(255, 106, 43, 0.3);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 106, 43, 0.4);
        }

        .nav-search {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            border: 1px solid var(--color-line);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-search:hover {
            color: var(--color-text);
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.05);
        }

        .hamburger-btn {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: none;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            border: 1px solid var(--color-line);
            background: rgba(255, 255, 255, 0.03);
            transition: border-color var(--transition-fast);
            flex-shrink: 0;
        }

        .hamburger-btn span {
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-text);
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }

        .hamburger-btn:hover {
            border-color: var(--color-line-strong);
        }

        /* 移动导航抽屉 */
        .mobile-nav-drawer {
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 99;
            background: rgba(11, 14, 17, 0.98);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            transform: translateY(-100%);
            transition: transform var(--transition-slow);
            padding: 24px 18px;
            border-top: 1px solid var(--color-line);
            overflow-y: auto;
        }

        .mobile-nav-drawer.open {
            transform: translateY(0);
        }

        .mobile-nav-drawer ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-nav-drawer a {
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 10px;
            display: block;
            transition: all var(--transition-fast);
        }

        .mobile-nav-drawer a:hover,
        .mobile-nav-drawer a.active {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .mobile-nav-drawer a.active {
            color: var(--color-primary);
        }

        .mobile-nav-drawer .drawer-cta {
            margin-top: 16px;
            padding: 14px;
            text-align: center;
            background: var(--color-primary);
            color: #0B0E11;
            font-weight: 600;
            border-radius: 10px;
        }

        /* Hero */
        .hero-banner {
            position: relative;
            min-height: 52vh;
            display: flex;
            align-items: center;
            padding-top: 120px;
            padding-bottom: 60px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 17, 0.78) 0%, rgba(11, 14, 17, 0.92) 55%, #0B0E11 100%);
        }

        .hero-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .hero-banner .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero-banner .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(255, 106, 43, 0.15);
            border: 1px solid rgba(255, 106, 43, 0.3);
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary-hover);
            margin-bottom: 18px;
        }

        .hero-banner .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-primary);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }

        .hero-banner h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.5rem);
            font-weight: 800;
            letter-spacing: 0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--color-text);
        }

        .hero-banner h1 .highlight {
            color: var(--color-primary);
        }

        .hero-banner .hero-subtitle {
            font-size: 1.05rem;
            color: var(--color-muted);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .hero-banner .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 10px;
            background: var(--color-primary);
            color: #0B0E11;
            font-weight: 600;
            font-size: 14.5px;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(255, 106, 43, 0.3);
        }

        .btn-primary:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(255, 106, 43, 0.4);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-primary:focus-visible {
            outline: 4px solid rgba(255, 106, 43, 0.35);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 10px;
            background: transparent;
            color: var(--color-text);
            font-weight: 500;
            font-size: 14.5px;
            border: 1px solid var(--color-line-strong);
            transition: all var(--transition-fast);
        }

        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        .btn-outline:active {
            transform: scale(0.98);
        }

        .btn-outline:focus-visible {
            outline: 4px solid rgba(255, 106, 43, 0.25);
            outline-offset: 2px;
        }

        /* 板块通用 */
        .section {
            padding: 80px 0;
        }

        .section-sm {
            padding: 56px 0;
        }

        .section-header {
            margin-bottom: 48px;
            max-width: 720px;
        }

        .section-header h2 {
            font-size: 1.85rem;
            font-weight: 700;
            letter-spacing: 0.01em;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text);
        }

        .section-header p {
            font-size: 15.5px;
            color: var(--color-muted);
            line-height: 1.9;
            max-width: 680px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .section-tag::before {
            content: '';
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-primary);
        }

        /* 图库筛选 */
        .gallery-filters {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
        }

        .filter-tag {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--color-muted);
            border: 1px solid var(--color-line);
            transition: all var(--transition-fast);
            cursor: pointer;
            background: rgba(255, 255, 255, 0.02);
        }

        .filter-tag:hover {
            color: var(--color-text);
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.06);
        }

        .filter-tag.active {
            color: var(--color-primary);
            border-color: var(--color-primary);
            background: rgba(255, 106, 43, 0.12);
            box-shadow: 0 0 16px rgba(255, 106, 43, 0.15);
        }

        /* 图片卡片 */
        .gallery-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-line);
            background: var(--color-surface);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            break-inside: avoid;
            margin-bottom: 20px;
        }

        .gallery-card:hover {
            transform: translateY(-2px);
            border-color: rgba(255, 106, 43, 0.5);
            box-shadow: var(--shadow-card-hover);
        }

        .gallery-card .gallery-image-wrap {
            overflow: hidden;
            position: relative;
        }

        .gallery-card .gallery-image-wrap img {
            width: 100%;
            object-fit: cover;
            transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
        }

        .gallery-card:hover .gallery-image-wrap img {
            transform: scale(1.05);
        }

        .gallery-card .gallery-info {
            padding: 18px 20px 20px;
        }

        .gallery-card .gallery-info h3 {
            font-size: 16.5px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .gallery-card .gallery-info p {
            font-size: 13.5px;
            color: var(--color-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .gallery-card .gallery-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--color-muted-2);
        }

        .gallery-card .gallery-meta .tag {
            padding: 3px 10px;
            border-radius: 6px;
            background: rgba(255, 106, 43, 0.1);
            color: var(--color-primary);
            font-weight: 500;
        }

        .gallery-card .gallery-overlay {
            position: absolute;
            top: 14px;
            right: 14px;
            padding: 4px 12px;
            border-radius: 8px;
            background: rgba(11, 14, 17, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-line);
            font-size: 12px;
            font-weight: 500;
            color: var(--color-text);
        }

        /* 品牌介绍块 */
        .brand-intro {
            padding: 60px 0;
            border-top: 1px solid var(--color-line);
            border-bottom: 1px solid var(--color-line);
            background: var(--color-surface);
        }

        .brand-intro .intro-content {
            max-width: 76ch;
            line-height: 2;
            color: var(--color-muted);
            font-size: 15.5px;
        }

        .brand-intro .intro-content strong {
            color: var(--color-text);
            font-weight: 600;
        }

        /* 指标横条 */
        .metrics-bar {
            padding: 48px 0;
            background: var(--color-surface-2);
            border-top: 1px solid var(--color-line);
            border-bottom: 1px solid var(--color-line);
        }

        .metrics-bar .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metrics-bar .metric-item {
            padding: 24px 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-line);
            background: var(--color-surface);
            text-align: center;
            transition: all var(--transition-fast);
        }

        .metrics-bar .metric-item:hover {
            border-color: rgba(255, 106, 43, 0.4);
            box-shadow: 0 8px 24px rgba(255, 106, 43, 0.1);
        }

        .metrics-bar .metric-value {
            font-size: 2rem;
            font-weight: 800;
            font-family: var(--font-mono);
            font-feature-settings: "tnum";
            color: var(--color-primary);
            line-height: 1.3;
        }

        .metrics-bar .metric-label {
            font-size: 13.5px;
            color: var(--color-muted);
            margin-top: 4px;
        }

        /* CTA */
        .cta-panel {
            padding: 72px 0 80px;
        }

        .cta-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            padding: 48px;
            border-radius: var(--radius-xl);
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

        .cta-inner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(255, 106, 43, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-inner .cta-text,
        .cta-inner .cta-form {
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--color-text);
        }

        .cta-inner .cta-text p {
            color: var(--color-muted);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 20px;
        }

        .cta-inner .trust-points {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .cta-inner .trust-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14.5px;
            color: var(--color-muted);
        }

        .cta-inner .trust-points li .check {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: rgba(46, 229, 157, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-success);
            font-size: 11px;
            flex-shrink: 0;
        }

        .form-card {
            background: rgba(28, 36, 46, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--color-line-strong);
            border-radius: var(--radius-lg);
            padding: 28px;
        }

        .form-card label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-muted);
            margin-bottom: 6px;
        }

        .form-card input,
        .form-card select,
        .form-card textarea {
            width: 100%;
            padding: 11px 14px;
            border-radius: 8px;
            background: rgba(11, 14, 17, 0.65);
            border: 1px solid var(--color-line);
            color: var(--color-text);
            font-size: 14px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            margin-bottom: 14px;
        }

        .form-card input:focus,
        .form-card select:focus,
        .form-card textarea:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.25);
        }

        .form-card textarea {
            min-height: 90px;
            resize: vertical;
        }

        .form-card .btn-submit {
            width: 100%;
            padding: 13px;
            border-radius: 10px;
            background: var(--color-primary);
            color: #0B0E11;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(255, 106, 43, 0.3);
        }

        .form-card .btn-submit:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 6px 24px rgba(255, 106, 43, 0.4);
        }

        /* 页脚 */
        .site-footer {
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand p {
            font-size: 13.5px;
            color: var(--color-muted);
            line-height: 1.8;
            margin-top: 14px;
            max-width: 36ch;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            font-size: 13.5px;
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-line);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 12.5px;
            color: var(--color-muted-2);
            line-height: 1.8;
        }

        .footer-bottom a {
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--color-primary);
        }

        .footer-links-bottom {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-copyright a {
            color: var(--color-text);
            font-weight: 500;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 28px;
            }
            .footer-grid .footer-col:last-child {
                grid-column: span 3;
            }
            .metrics-bar .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .nav-links {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .mobile-nav-drawer {
                top: 60px;
            }
            .hero-banner {
                min-height: 45vh;
                padding-top: 90px;
                padding-bottom: 40px;
            }
            .hero-banner h1 {
                font-size: 1.8rem;
            }
            .hero-banner .hero-subtitle {
                font-size: 0.95rem;
            }
            .section {
                padding: 48px 0;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                padding: 28px 20px;
                gap: 28px;
            }
            .cta-inner h2 {
                font-size: 1.45rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid .footer-col:last-child {
                grid-column: auto;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }
            .footer-links-bottom {
                justify-content: center;
            }
            .metrics-bar .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .metrics-bar .metric-value {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .container-wide {
                padding-left: 14px;
                padding-right: 14px;
            }
            .hero-banner h1 {
                font-size: 1.55rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .metrics-bar .metrics-grid {
                grid-template-columns: 1fr 1fr;
            }
            .gallery-filters {
                gap: 6px;
            }
            .filter-tag {
                padding: 6px 12px;
                font-size: 12px;
            }
            .btn-primary,
            .btn-outline {
                padding: 10px 20px;
                font-size: 13.5px;
                width: 100%;
            }
            .hero-banner .hero-actions {
                flex-direction: column;
            }
        }

        /* 瀑布流 columns */
        .gallery-masonry {
            columns: 3;
            column-gap: 20px;
        }

        @media (max-width: 1024px) {
            .gallery-masonry {
                columns: 2;
            }
        }

        @media (max-width: 640px) {
            .gallery-masonry {
                columns: 1;
            }
        }

/* roulang page: category5 */
:root {
            --color-bg: #0B0E11;
            --color-surface: #12171D;
            --color-surface-2: #171E26;
            --color-surface-3: #1C242E;
            --color-primary: #FF6A2B;
            --color-primary-hover: #FF8145;
            --color-primary-glow: rgba(255, 106, 43, 0.35);
            --color-text: #F4F7FA;
            --color-muted: #AAB4BF;
            --color-muted-2: #8A95A1;
            --color-line: rgba(255, 255, 255, 0.10);
            --color-line-strong: rgba(255, 255, 255, 0.16);
            --color-success: #2EE59D;
            --color-warning: #FFC24B;
            --color-danger: #FF5C5C;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.28);
            --shadow-card-hover: 0 16px 50px rgba(255, 106, 43, 0.15), 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-nav: 0 4px 24px rgba(0, 0, 0, 0.35);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container-wide {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        @media (max-width: 768px) {
            .container-wide {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        @media (max-width: 520px) {
            .container-wide {
                padding-left: 14px;
                padding-right: 14px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 14, 17, 0.55);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
            transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(11, 14, 17, 0.95);
            backdrop-filter: blur(24px) saturate(1.5);
            -webkit-backdrop-filter: blur(24px) saturate(1.5);
            border-bottom-color: var(--color-line-strong);
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.02em;
            color: var(--color-text);
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            opacity: 0.85;
        }

        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #D84A1A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            color: #0B0E11;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(255, 106, 43, 0.35);
            flex-shrink: 0;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .logo-text small {
            font-size: 10px;
            font-weight: 400;
            color: var(--color-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.12);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .search-btn {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            border: 1px solid var(--color-line);
            background: rgba(255, 255, 255, 0.04);
            transition: all var(--transition-fast);
        }

        .search-btn:hover {
            color: var(--color-text);
            border-color: var(--color-line-strong);
            background: rgba(255, 255, 255, 0.08);
        }

        .search-btn:focus-visible {
            outline: 3px solid var(--color-primary-glow);
            outline-offset: 2px;
        }

        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            font-size: 14px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            border-radius: 10px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 106, 43, 0.35);
        }

        .btn-nav-cta:active {
            transform: scale(0.98);
        }

        .btn-nav-cta:focus-visible {
            outline: 4px solid var(--color-primary-glow);
            outline-offset: 2px;
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            border: 1px solid var(--color-line);
            background: rgba(255, 255, 255, 0.04);
            transition: all var(--transition-fast);
        }

        .hamburger:hover {
            border-color: var(--color-line-strong);
        }

        .hamburger span {
            display: block;
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-text);
            transition: all var(--transition-fast);
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== 移动端导航抽屉 ===== */
        .mobile-nav {
            display: none;
            position: absolute;
            top: 68px;
            left: 0;
            right: 0;
            background: rgba(11, 14, 17, 0.98);
            border-bottom: 1px solid var(--color-line-strong);
            padding: 16px 28px 24px;
            z-index: 99;
        }

        .mobile-nav.open {
            display: block;
        }

        .mobile-nav ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-muted);
            border-radius: 10px;
            transition: all var(--transition-fast);
        }

        .mobile-nav a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .mobile-nav a.active {
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.12);
        }

        /* ===== Hero Banner（低高度） ===== */
        .support-hero {
            position: relative;
            min-height: 55vh;
            display: flex;
            align-items: center;
            padding-top: 68px;
            padding-bottom: 48px;
            overflow: hidden;
            background-color: var(--color-bg);
        }

        .support-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
            z-index: 0;
        }

        .support-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 17, 0.65) 0%, rgba(11, 14, 17, 0.88) 60%, rgba(11, 14, 17, 0.98) 100%);
            z-index: 1;
        }

        .support-hero-grid-bg {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 48px 48px;
            z-index: 1;
        }

        .support-hero-glow {
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(255, 106, 43, 0.18) 0%, transparent 68%);
            z-index: 1;
            pointer-events: none;
        }

        .support-hero-inner {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .support-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            border: 1px solid rgba(255, 106, 43, 0.35);
            background: rgba(255, 106, 43, 0.10);
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .support-hero-badge::before {
            content: '';
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-success);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.3);
            }
        }

        .support-hero h1 {
            font-size: clamp(32px, 5.6vw, 56px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            color: var(--color-text);
        }

        .support-hero h1 .highlight {
            color: var(--color-primary);
        }

        .support-hero-subtitle {
            font-size: 17px;
            color: var(--color-muted);
            line-height: 1.8;
            max-width: 640px;
            margin-bottom: 24px;
        }

        .support-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 28px;
        }

        .support-hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-muted);
        }

        .support-hero-meta-item .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-success);
            flex-shrink: 0;
        }

        .support-hero-meta-item .dot.warning {
            background: var(--color-warning);
        }

        .support-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ===== 按钮通用 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            border-radius: 10px;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 8px 28px rgba(255, 106, 43, 0.35);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-primary:focus-visible {
            outline: 4px solid var(--color-primary-glow);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            border: 1px solid var(--color-line-strong);
            border-radius: 10px;
            background: transparent;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.06);
        }

        .btn-secondary:active {
            transform: scale(0.98);
        }

        .btn-secondary:focus-visible {
            outline: 4px solid var(--color-primary-glow);
            outline-offset: 2px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }

        .section-sm {
            padding: 48px 0;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 10px;
            color: var(--color-text);
        }

        .section-subtitle {
            font-size: 15.5px;
            color: var(--color-muted);
            line-height: 1.8;
            max-width: 600px;
            margin-bottom: 40px;
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        /* ===== 快速指标横条 ===== */
        .quick-stats {
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
            border-bottom: 1px solid var(--color-line);
            padding: 20px 0;
        }

        .quick-stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .quick-stat-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 16px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 10px;
            border: 1px solid var(--color-line);
        }

        .quick-stat-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: rgba(255, 106, 43, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            flex-shrink: 0;
            font-size: 16px;
        }

        .quick-stat-info {
            display: flex;
            flex-direction: column;
            line-height: 1.3;
        }

        .quick-stat-value {
            font-family: var(--font-mono);
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            font-feature-settings: "tnum";
        }

        .quick-stat-label {
            font-size: 12px;
            color: var(--color-muted-2);
        }

        /* ===== 步骤条 ===== */
        .steps-section {
            background: var(--color-bg);
            position: relative;
        }

        .steps-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--color-line);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, rgba(255, 106, 43, 0.6), rgba(255, 106, 43, 0.15));
            z-index: 0;
        }

        .step-card {
            position: relative;
            z-index: 1;
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 28px 24px 24px;
            transition: all var(--transition-base);
        }

        .step-card:hover {
            border-color: var(--color-primary-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #D84A1A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-size: 20px;
            font-weight: 700;
            color: #0B0E11;
            margin-bottom: 16px;
            box-shadow: 0 4px 14px rgba(255, 106, 43, 0.30);
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .step-card p {
            font-size: 14.5px;
            color: var(--color-muted);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .step-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .step-tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-muted);
            background: rgba(255, 255, 255, 0.06);
            border-radius: 5px;
            border: 1px solid var(--color-line);
        }

        /* ===== FAQ手风琴 ===== */
        .faq-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--color-line);
            max-width: 800px;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-line);
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-bottom-color: var(--color-primary-glow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 8px 20px 0;
            text-align: left;
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            border: 1px solid var(--color-line);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--color-muted);
            transition: all var(--transition-base);
        }

        .faq-item.open .faq-icon {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.10);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0;
        }

        .faq-answer-inner {
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.9;
            padding-bottom: 20px;
            padding-right: 24px;
            max-width: 700px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding-top: 4px;
        }

        /* ===== 联系表单 ===== */
        .contact-section {
            background: var(--color-bg);
            position: relative;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 48px;
            align-items: start;
        }

        .contact-info {
            padding-right: 12px;
        }

        .contact-info .section-title {
            margin-bottom: 12px;
        }

        .contact-info-desc {
            font-size: 15.5px;
            color: var(--color-muted);
            line-height: 1.9;
            margin-bottom: 28px;
            max-width: 480px;
        }

        .trust-points {
            list-style: none;
            margin: 0 0 32px;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .trust-point {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--color-text);
            line-height: 1.7;
        }

        .trust-point-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(46, 229, 157, 0.15);
            color: var(--color-success);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 12px;
            font-weight: 700;
            margin-top: 3px;
        }

        .contact-extra-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .contact-extra-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }

        .contact-extra-link:hover {
            color: var(--color-primary);
        }

        .contact-extra-link .link-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--color-primary);
            flex-shrink: 0;
        }

        .contact-form-card {
            background: var(--color-surface);
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }

        .contact-form-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--color-text);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group.full {
            grid-column: 1 / -1;
        }

        .form-label {
            font-size: 13px;
            font-weight: 500;
            color: var(--color-muted);
        }

        .form-input,
        .form-select,
        .form-textarea {
            width: 100%;
            padding: 11px 14px;
            font-size: 14.5px;
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-line);
            border-radius: 8px;
            transition: all var(--transition-fast);
        }

        .form-input::placeholder,
        .form-textarea::placeholder {
            color: var(--color-muted-2);
        }

        .form-input:hover,
        .form-select:hover,
        .form-textarea:hover {
            border-color: var(--color-line-strong);
        }

        .form-input:focus,
        .form-select:focus,
        .form-textarea:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.20);
        }

        .form-textarea {
            min-height: 100px;
            resize: vertical;
        }

        .form-select {
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23AAB4BF' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            background-size: 16px;
            padding-right: 40px;
        }

        .form-select option {
            background: var(--color-surface-2);
            color: var(--color-text);
        }

        .form-submit {
            margin-top: 20px;
            width: 100%;
            padding: 14px 28px;
            font-size: 16px;
            font-weight: 600;
            color: #0B0E11;
            background: var(--color-primary);
            border-radius: 10px;
            transition: all var(--transition-base);
        }

        .form-submit:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 8px 28px rgba(255, 106, 43, 0.35);
        }

        .form-submit:active {
            transform: scale(0.98);
        }

        .form-submit:focus-visible {
            outline: 4px solid var(--color-primary-glow);
            outline-offset: 2px;
        }

        .form-note {
            margin-top: 12px;
            font-size: 12.5px;
            color: var(--color-muted-2);
            text-align: center;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-line);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 17, 0.92) 0%, rgba(11, 14, 17, 0.80) 100%);
            z-index: 1;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--color-text);
        }

        .cta-inner p {
            font-size: 15.5px;
            color: var(--color-muted);
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #07090C;
            border-top: 1px solid var(--color-line);
            padding: 48px 0 24px;
            font-size: 14px;
            color: var(--color-muted);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-brand p {
            font-size: 13.5px;
            line-height: 1.8;
            color: var(--color-muted-2);
            margin-top: 12px;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            font-size: 13.5px;
            color: var(--color-muted-2);
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid var(--color-line);
            font-size: 12.5px;
            color: var(--color-muted-2);
        }

        .footer-copyright a {
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }

        .footer-copyright a:hover {
            color: var(--color-primary);
        }

        .footer-links-bottom {
            display: flex;
            gap: 16px;
        }

        .footer-links-bottom a {
            color: var(--color-muted-2);
            transition: color var(--transition-fast);
        }

        .footer-links-bottom a:hover {
            color: var(--color-primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .steps-grid {
                gap: 16px;
            }

            .step-card {
                padding: 22px 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .header-inner {
                height: 60px;
            }

            .mobile-nav {
                top: 60px;
            }

            .btn-nav-cta {
                display: none;
            }

            .support-hero {
                min-height: 50vh;
                padding-top: 60px;
            }

            .support-hero h1 {
                font-size: clamp(28px, 7vw, 40px);
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .steps-grid::before {
                display: none;
            }

            .quick-stats-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .form-grid {
                grid-template-columns: 1fr;
            }

            .form-group.full {
                grid-column: 1;
            }

            .contact-form-card {
                padding: 24px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }

            .section {
                padding: 48px 0;
            }

            .cta-section {
                padding: 48px 0;
            }
        }

        @media (max-width: 520px) {
            .container-wide {
                padding-left: 14px;
                padding-right: 14px;
            }

            .support-hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .support-hero-actions .btn-primary,
            .support-hero-actions .btn-secondary {
                width: 100%;
                text-align: center;
                justify-content: center;
            }

            .faq-question {
                font-size: 15.5px;
                padding-right: 0;
            }

            .contact-form-card {
                padding: 20px 16px;
            }
        }

        /* ===== 图片悬停 ===== */
        .img-hover {
            overflow: hidden;
            border-radius: var(--radius-lg);
        }

        .img-hover img {
            transition: transform var(--transition-slow);
        }

        .img-hover:hover img {
            transform: scale(1.04);
        }

        /* ===== 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 500;
            border-radius: 6px;
            border: 1px solid var(--color-line);
            color: var(--color-muted);
            background: rgba(255, 255, 255, 0.04);
        }

        .badge-primary {
            border-color: rgba(255, 106, 43, 0.35);
            color: var(--color-primary);
            background: rgba(255, 106, 43, 0.10);
        }

        .badge-success {
            border-color: rgba(46, 229, 157, 0.30);
            color: var(--color-success);
            background: rgba(46, 229, 157, 0.08);
        }

        section {
            scroll-margin-top: 80px;
        }