/* roulang page: index */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #0D1322;
            --bg-card: #0F1A2E;
            --bg-panel: #111C31;
            --primary-blue-1: #0F2847;
            --primary-blue-2: #12335A;
            --primary-blue-3: #16406E;
            --accent-cyan: #00C8FF;
            --accent-cyan-2: #00E0FF;
            --accent-cyan-3: #00AED6;
            --accent-warm: #FFB84D;
            --text-primary: #F0F4FA;
            --text-secondary: #C6D3E3;
            --text-muted: #8A9BB8;
            --border-glow: rgba(0, 200, 255, 0.28);
            --border-soft: rgba(0, 200, 255, 0.12);
            --glass-bg: rgba(17, 28, 48, 0.72);
            --glass-dark: rgba(10, 16, 25, 0.55);
            --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 18px rgba(0, 200, 255, 0.35);
            --shadow-glow-hover: 0 0 26px rgba(0, 224, 255, 0.55);
            --radius-card: 12px;
            --radius-btn: 9px;
            --radius-input: 7px;
            --sidebar-width: 268px;
            --header-height: 64px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --font-display: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Inter', sans-serif;
            --section-pad: 72px;
            --card-gap: 24px;
        }

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

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-height) + 20px);
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-attachment: fixed;
        }

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

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover,
        a:focus {
            color: var(--accent-cyan-2);
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-display);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

        p {
            margin-bottom: 0.75rem;
            color: var(--text-secondary);
        }

        /* ==================== Foundation 默认样式覆盖 ==================== */
        .row {
            max-width: 100%;
        }
        .row .row {
            margin-left: 0;
            margin-right: 0;
        }
        a.button,
        button.button {
            font-family: var(--font-sans);
        }
        .accordion {
            background: transparent;
            border: none;
        }
        .accordion .accordion-title {
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            color: var(--text-primary);
            font-size: 0.98rem;
            font-weight: 600;
            padding: 16px 20px;
            transition: all var(--transition-base);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }
        .accordion .accordion-title:hover,
        .accordion .accordion-title:focus {
            background: rgba(17, 40, 71, 0.85);
            border-color: var(--border-glow);
            color: var(--accent-cyan-2);
        }
        .accordion .accordion-item.is-active .accordion-title {
            background: rgba(17, 40, 71, 0.9);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan-2);
        }
        .accordion .accordion-content {
            background: var(--glass-dark);
            border: 1px solid var(--border-soft);
            border-top: none;
            border-radius: 0 0 var(--radius-card) var(--radius-card);
            color: var(--text-secondary);
            padding: 18px 20px;
            line-height: 1.75;
        }
        input, select, textarea {
            background: rgba(15, 26, 46, 0.85) !important;
            border: 1px solid rgba(0, 200, 255, 0.2) !important;
            border-radius: var(--radius-input) !important;
            color: var(--text-primary) !important;
            box-shadow: none !important;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast) !important;
            padding: 10px 14px !important;
            font-size: 0.9rem !important;
        }
        input:focus, select:focus, textarea:focus {
            border-color: var(--accent-cyan) !important;
            box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.3), 0 0 12px rgba(0, 200, 255, 0.15) !important;
            outline: none !important;
        }

        /* ==================== 顶栏 Header ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(6, 10, 18, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 200, 255, 0.14);
            z-index: 100;
            display: flex;
            align-items: center;
            padding: 0 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.38);
        }

        .site-header .brand-logo {
            display: flex;
            align-items: center;
            flex-shrink: 0;
            font-size: 1.18rem;
            font-weight: 700;
            font-family: var(--font-display);
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .site-header .brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: var(--accent-cyan);
            color: #06121F;
            font-size: 0.9rem;
            font-weight: 800;
            margin-right: 10px;
            box-shadow: var(--shadow-glow);
        }

        .header-search {
            display: flex;
            align-items: center;
            flex: 1;
            max-width: 380px;
            margin: 0 24px;
            position: relative;
        }
        .header-search input {
            width: 100%;
            padding-left: 38px !important;
            background: rgba(15, 26, 46, 0.7) !important;
        }
        .header-search .search-icon {
            position: absolute;
            left: 12px;
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .header-controls {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
            flex-shrink: 0;
        }
        .header-controls select {
            padding: 6px 10px !important;
            font-size: 0.8rem !important;
            background: rgba(15, 26, 46, 0.8) !important;
            border-radius: 6px !important;
            min-width: auto;
            height: auto;
        }
        .header-controls .lang-group,
        .header-controls .ver-group {
            display: flex;
            align-items: center;
        }
        .header-controls .control-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-right: 6px;
            white-space: nowrap;
        }

        .mobile-nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            color: var(--text-primary);
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }
        .mobile-nav-toggle:hover,
        .mobile-nav-toggle:focus {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan-2);
        }

        /* ==================== 左侧文档侧栏 ==================== */
        .doc-sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: rgba(11, 17, 30, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-right: 1px solid rgba(0, 200, 255, 0.12);
            z-index: 90;
            padding: 24px 16px 32px;
            overflow-y: auto;
            transition: transform var(--transition-base);
            box-shadow: 4px 0 28px rgba(0, 0, 0, 0.3);
        }
        .doc-sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .doc-sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .doc-sidebar::-webkit-scrollbar-thumb {
            background: rgba(0, 200, 255, 0.25);
            border-radius: 2px;
        }

        .doc-sidebar .sidebar-section-title {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin: 20px 0 8px 12px;
        }
        .doc-sidebar .sidebar-section-title:first-of-type {
            margin-top: 0;
        }

        .doc-sidebar .nav-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 12px;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .doc-sidebar .nav-link:hover,
        .doc-sidebar .nav-link:focus {
            background: rgba(17, 40, 71, 0.6);
            color: var(--accent-cyan-2);
            border-color: var(--border-soft);
        }
        .doc-sidebar .nav-link.active {
            background: rgba(0, 200, 255, 0.1);
            color: var(--accent-cyan-2);
            border-color: var(--border-glow);
            font-weight: 600;
        }
        .doc-sidebar .nav-link .nav-icon {
            font-size: 0.85rem;
            width: 18px;
            text-align: center;
            color: var(--accent-cyan-3);
        }
        .doc-sidebar .nav-link .nav-indicator {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--accent-cyan);
            margin-left: auto;
            opacity: 0;
            transition: opacity var(--transition-fast);
        }
        .doc-sidebar .nav-link.active .nav-indicator {
            opacity: 1;
        }

        .doc-sidebar .sub-nav-link {
            display: block;
            padding: 5px 12px 5px 38px;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-left: 2px solid var(--border-soft);
            margin-left: 16px;
            transition: all var(--transition-fast);
        }
        .doc-sidebar .sub-nav-link:hover,
        .doc-sidebar .sub-nav-link:focus {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
        }

        .sidebar-divider {
            height: 1px;
            background: rgba(0, 200, 255, 0.1);
            margin: 16px 0;
        }

        /* ==================== 主内容区 ==================== */
        .main-content {
            margin-left: var(--sidebar-width);
            padding-top: var(--header-height);
            min-height: 100vh;
        }

        /* ==================== 通用布局 ==================== */
        .container-custom {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 40px;
        }
        .section {
            padding: var(--section-pad) 0;
            position: relative;
        }
        .section-alt {
            background: rgba(15, 26, 46, 0.45);
            border-top: 1px solid rgba(0, 200, 255, 0.07);
            border-bottom: 1px solid rgba(0, 200, 255, 0.07);
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.1);
            border: 1px solid rgba(0, 200, 255, 0.2);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 1.85rem;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }
        .section-header .section-desc {
            color: var(--text-secondary);
            font-size: 0.95rem;
            max-width: 780px;
            line-height: 1.8;
        }

        /* ==================== 玻璃拟态卡片 ==================== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            padding: 24px;
            transition: all var(--transition-base);
        }
        .glass-card:hover {
            border-color: rgba(0, 200, 255, 0.45);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 18px rgba(0, 200, 255, 0.12);
            transform: translateY(-2px);
        }

        /* ==================== 发光按钮 ==================== */
        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #06121F;
            font-weight: 700;
            font-size: 0.92rem;
            padding: 13px 30px;
            border-radius: var(--radius-btn);
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
            letter-spacing: 0.02em;
            border: 1px solid transparent;
        }
        .btn-glow:hover,
        .btn-glow:focus {
            background: #33D6FF;
            color: #06121F;
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 10px rgba(0, 200, 255, 0.25);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--accent-cyan);
            transition: all var(--transition-base);
            letter-spacing: 0.02em;
        }
        .btn-outline:hover,
        .btn-outline:focus {
            background: rgba(0, 200, 255, 0.1);
            color: var(--accent-cyan-2);
            border-color: var(--accent-cyan-2);
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.2);
        }

        /* ==================== Hero 首屏 ==================== */
        .hero {
            position: relative;
            min-height: calc(100vh - var(--header-height));
            display: flex;
            align-items: center;
            overflow: hidden;
            background-image: url('/assets/images/cf1eceac8e5ebf7b.webp');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(6, 10, 18, 0.72);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(0, 200, 255, 0.14) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 60%, rgba(31, 58, 107, 0.35) 0%, transparent 55%);
            z-index: 1;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 80px 40px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.12);
            border: 1px solid rgba(0, 200, 255, 0.3);
            border-radius: 24px;
            padding: 6px 18px;
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }
        .hero-badge .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-warm);
            animation: pulse-dot 1.8s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.8); }
        }
        .hero h1 {
            font-size: 2.7rem;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: 0.015em;
            line-height: 1.2;
            text-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
        }
        .hero-subtitle {
            font-size: 1.02rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 30px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 32px;
        }
        .hero-countdown {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-countdown .countdown-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 600;
            letter-spacing: 0.04em;
        }
        .hero-countdown .countdown-timer {
            display: flex;
            gap: 10px;
        }
        .hero-countdown .cd-unit {
            display: flex;
            flex-direction: column;
            align-items: center;
            background: rgba(10, 20, 35, 0.7);
            border: 1px solid rgba(0, 200, 255, 0.25);
            border-radius: 8px;
            min-width: 58px;
            padding: 8px 6px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .hero-countdown .cd-num {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-cyan-2);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .hero-countdown .cd-label {
            font-size: 0.68rem;
            color: var(--text-muted);
            letter-spacing: 0.05em;
        }

        .hero-subscribe {
            display: flex;
            align-items: center;
            gap: 10px;
            max-width: 480px;
            margin-top: 20px;
        }
        .hero-subscribe input {
            flex: 1;
            background: rgba(10, 20, 35, 0.75) !important;
            border-radius: var(--radius-btn) !important;
            padding: 12px 16px !important;
        }
        .hero-subscribe .btn-glow {
            flex-shrink: 0;
            padding: 12px 24px;
        }

        /* ==================== 叙事板块 ==================== */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: var(--card-gap);
        }
        .pain-item {
            padding: 20px;
        }
        .pain-item .pain-icon {
            font-size: 1.4rem;
            color: var(--accent-warm);
            margin-bottom: 12px;
        }
        .pain-item h3 {
            font-size: 1.02rem;
            margin-bottom: 8px;
            font-weight: 700;
        }
        .pain-item p {
            font-size: 0.87rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .solution-flex {
            display: flex;
            flex-wrap: wrap;
            gap: var(--card-gap);
        }
        .solution-card {
            flex: 1 1 calc(33.333% - 24px);
            min-width: 260px;
        }
        .solution-card .sol-number {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 0.06em;
            margin-bottom: 10px;
        }
        .solution-card h3 {
            font-size: 1.05rem;
            margin-bottom: 10px;
        }
        .solution-card p {
            font-size: 0.88rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .steps-wrapper {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .step-block {
            flex: 1 1 200px;
            max-width: 260px;
            text-align: center;
            padding: 24px 18px;
            position: relative;
        }
        .step-block:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 44px;
            right: -20px;
            width: 20px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-cyan), rgba(0, 200, 255, 0.1));
        }
        .step-block .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(0, 200, 255, 0.12);
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan-2);
            font-size: 1.15rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.2);
        }
        .step-block h3 {
            font-size: 0.95rem;
            margin-bottom: 6px;
        }
        .step-block p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--card-gap);
        }
        .metric-card {
            text-align: center;
            padding: 22px 16px;
        }
        .metric-card .metric-value {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--accent-cyan-2);
            line-height: 1.2;
            margin-bottom: 6px;
            font-variant-numeric: tabular-nums;
        }
        .metric-card .metric-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .metric-card .metric-change {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            color: #4CD985;
            margin-top: 6px;
            background: rgba(76, 217, 133, 0.1);
            padding: 2px 8px;
            border-radius: 10px;
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--card-gap);
        }
        .testimonial-card {
            padding: 22px;
            position: relative;
        }
        .testimonial-card .quote-mark {
            font-size: 2rem;
            color: var(--accent-cyan);
            opacity: 0.35;
            line-height: 1;
            margin-bottom: 10px;
            font-family: Georgia, serif;
        }
        .testimonial-card .quote-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 14px;
            font-style: italic;
        }
        .testimonial-card .quote-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .testimonial-card .author-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(0, 200, 255, 0.2);
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .testimonial-card .author-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
        }
        .testimonial-card .author-title {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .audience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: var(--card-gap);
        }
        .audience-card {
            padding: 22px;
        }
        .audience-card .aud-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.1);
            border-radius: 4px;
            padding: 2px 10px;
            margin-bottom: 10px;
        }
        .audience-card h3 {
            font-size: 1rem;
            margin-bottom: 8px;
        }
        .audience-card p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 20px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            transition: all var(--transition-base);
            flex-wrap: wrap;
        }
        .news-item:hover {
            border-color: var(--border-glow);
            background: rgba(17, 40, 71, 0.6);
        }
        .news-item .news-img {
            width: 80px;
            height: 54px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .news-item .news-content {
            flex: 1;
            min-width: 200px;
        }
        .news-item .news-title {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .news-item .news-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .news-item .news-tag {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.1);
            padding: 3px 10px;
            border-radius: 4px;
            flex-shrink: 0;
        }

        .indicator-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
            gap: var(--card-gap);
        }
        .indicator-card {
            padding: 20px;
        }
        .indicator-card .ind-label {
            font-size: 0.78rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }
        .indicator-card .ind-value {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-cyan-2);
            font-variant-numeric: tabular-nums;
            margin-bottom: 4px;
        }
        .indicator-card .ind-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .guarantee-item {
            padding: 18px;
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .guarantee-item .g-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(0, 200, 255, 0.12);
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .guarantee-item h4 {
            font-size: 0.9rem;
            margin-bottom: 4px;
        }
        .guarantee-item p {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }

        .brand-intro {
            padding: 32px 36px;
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
        }
        .brand-intro h2 {
            font-size: 1.6rem;
            margin-bottom: 16px;
        }
        .brand-intro p {
            font-size: 0.95rem;
            line-height: 1.85;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }
        .brand-intro p:last-child {
            margin-bottom: 0;
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--card-gap);
        }
        .category-entry {
            padding: 22px;
            text-align: center;
            display: block;
            color: var(--text-primary);
        }
        .category-entry:hover {
            color: var(--text-primary);
        }
        .category-entry .cat-icon {
            font-size: 1.6rem;
            color: var(--accent-cyan);
            margin-bottom: 10px;
        }
        .category-entry h3 {
            font-size: 0.98rem;
            margin-bottom: 6px;
        }
        .category-entry p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .category-entry .cat-arrow {
            display: inline-block;
            margin-top: 10px;
            font-size: 0.85rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
        }
        .category-entry:hover .cat-arrow {
            transform: translateX(4px);
        }

        .scene-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: var(--card-gap);
        }
        .scene-card {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-card);
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            transition: all var(--transition-base);
        }
        .scene-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-dark), 0 0 16px rgba(0, 200, 255, 0.1);
        }
        .scene-card img {
            height: 160px;
            width: 100%;
            object-fit: cover;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }
        .scene-card .scene-body {
            padding: 18px 20px;
        }
        .scene-card .scene-body h3 {
            font-size: 0.95rem;
            margin-bottom: 8px;
        }
        .scene-card .scene-body p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        .version-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .version-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 22px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            transition: all var(--transition-base);
            flex-wrap: wrap;
        }
        .version-item:hover {
            border-color: var(--border-glow);
            background: rgba(17, 40, 71, 0.6);
        }
        .version-item .ver-tag {
            font-weight: 800;
            font-size: 1rem;
            color: var(--accent-cyan-2);
            flex-shrink: 0;
            min-width: 70px;
        }
        .version-item .ver-info {
            flex: 1;
            min-width: 180px;
        }
        .version-item .ver-info h4 {
            font-size: 0.9rem;
            margin-bottom: 4px;
        }
        .version-item .ver-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .version-item .ver-size {
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .cta-section {
            text-align: center;
            padding: 80px 20px;
            background: radial-gradient(ellipse at center, rgba(0, 200, 255, 0.07) 0%, transparent 65%);
        }
        .cta-section h2 {
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .cta-section .cta-desc {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .partner-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 20px 36px;
        }
        .partner-item {
            font-size: 0.92rem;
            color: var(--text-muted);
            font-weight: 600;
            letter-spacing: 0.4px;
            transition: color var(--transition-fast);
            cursor: default;
        }
        .partner-item:hover {
            color: var(--text-secondary);
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: rgba(6, 10, 18, 0.95);
            border-top: 1px solid rgba(0, 200, 255, 0.12);
            padding: 40px 0 28px;
            margin-left: var(--sidebar-width);
        }
        .footer-inner {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 40px;
        }
        .footer-top {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 28px;
            margin-bottom: 28px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(0, 200, 255, 0.08);
        }
        .footer-brand .footer-logo {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            font-family: var(--font-display);
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-links a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ==================== 响应式设计 ==================== */
        @media screen and (max-width: 1024px) {
            :root {
                --section-pad: 56px;
                --sidebar-width: 240px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .container-custom {
                padding: 0 24px;
            }
            .footer-inner {
                padding: 0 24px;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-pad: 48px;
            }
            .site-header {
                padding: 0 16px;
                height: 56px;
            }
            .header-search {
                display: none;
            }
            .mobile-nav-toggle {
                display: flex;
            }
            .header-controls .control-label {
                display: none;
            }
            .header-controls {
                gap: 6px;
            }
            .header-controls select {
                font-size: 0.72rem !important;
                padding: 4px 6px !important;
                max-width: 72px;
            }

            .doc-sidebar {
                transform: translateX(-100%);
                width: 280px;
                top: 56px;
                z-index: 89;
            }
            .doc-sidebar.open {
                transform: translateX(0);
                box-shadow: 8px 0 40px rgba(0, 0, 0, 0.55);
            }
            .doc-sidebar-overlay {
                position: fixed;
                inset: 0;
                top: 56px;
                background: rgba(6, 10, 18, 0.6);
                z-index: 85;
                opacity: 0;
                pointer-events: none;
                transition: opacity var(--transition-base);
            }
            .doc-sidebar-overlay.show {
                opacity: 1;
                pointer-events: auto;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .site-footer {
                margin-left: 0;
            }

            .hero {
                min-height: auto;
                padding: 60px 0;
            }
            .hero-inner {
                padding: 60px 20px;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-countdown .cd-unit {
                min-width: 44px;
                padding: 6px 4px;
            }
            .hero-countdown .cd-num {
                font-size: 1rem;
            }
            .hero-subscribe {
                flex-wrap: wrap;
            }
            .hero-subscribe input {
                flex: 1 1 100%;
            }

            .section-header h2 {
                font-size: 1.45rem;
            }
            .step-block:not(:last-child)::after {
                display: none;
            }
            .steps-wrapper {
                flex-direction: column;
                align-items: center;
            }
            .step-block {
                max-width: 100%;
                flex: 1 1 auto;
                width: 100%;
            }
            .solution-card {
                flex: 1 1 100%;
                min-width: auto;
            }
            .version-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .news-item .news-img {
                width: 100%;
                height: 140px;
            }
            .footer-top {
                flex-direction: column;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media screen and (max-width: 520px) {
            .hero h1 {
                font-size: 1.35rem;
            }
            .hero-badge {
                font-size: 0.7rem;
                padding: 4px 12px;
            }
            .btn-glow, .btn-outline {
                padding: 11px 20px;
                font-size: 0.85rem;
                width: 100%;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-glow,
            .hero-actions .btn-outline {
                width: 100%;
            }
            .container-custom {
                padding: 0 16px;
            }
            .footer-inner {
                padding: 0 16px;
            }
            .glass-card {
                padding: 18px;
            }
            .section-header .section-tag {
                font-size: 0.65rem;
            }
            .section-header h2 {
                font-size: 1.25rem;
            }
            .brand-intro {
                padding: 22px 20px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #0D1322;
            --bg-card: #0F1A2E;
            --bg-panel: #111C31;
            --primary-blue-1: #0F2847;
            --primary-blue-2: #12335A;
            --primary-blue-3: #16406E;
            --accent-cyan: #00C8FF;
            --accent-cyan-2: #00E0FF;
            --accent-cyan-3: #00AED6;
            --accent-warm: #FFB84D;
            --text-primary: #F0F4FA;
            --text-secondary: #C6D3E3;
            --text-muted: #8A9BB8;
            --border-glow: rgba(0, 200, 255, 0.28);
            --border-soft: rgba(0, 200, 255, 0.12);
            --glass-bg: rgba(17, 28, 48, 0.72);
            --glass-dark: rgba(10, 16, 25, 0.55);
            --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 18px rgba(0, 200, 255, 0.35);
            --shadow-glow-hover: 0 0 26px rgba(0, 224, 255, 0.55);
            --radius-card: 12px;
            --radius-btn: 9px;
            --radius-input: 7px;
            --sidebar-width: 268px;
            --header-height: 64px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --font-display: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Inter', sans-serif;
            --section-pad: 72px;
            --card-gap: 24px;
        }

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-height) + 20px);
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-attachment: fixed;
            margin: 0;
            padding: 0;
        }

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

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

        a:hover,
        a:focus {
            color: var(--accent-cyan-2);
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .row {
            max-width: 100%;
        }

        .row .row {
            margin-left: 0;
            margin-right: 0;
        }

        input,
        select,
        textarea {
            background: rgba(15, 26, 46, 0.85) !important;
            border: 1px solid rgba(0, 200, 255, 0.2) !important;
            border-radius: var(--radius-input) !important;
            color: var(--text-primary) !important;
            box-shadow: none !important;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast) !important;
            padding: 10px 14px !important;
            font-size: 0.9rem !important;
            width: 100%;
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--accent-cyan) !important;
            box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.3), 0 0 12px rgba(0, 200, 255, 0.15) !important;
            outline: none !important;
        }

        /* ==================== Header ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(6, 10, 18, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 200, 255, 0.14);
            z-index: 100;
            display: flex;
            align-items: center;
            padding: 0 18px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.38);
        }

        .site-header .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: 0.01em;
            flex-shrink: 0;
            margin-right: 20px;
            transition: color var(--transition-fast);
        }

        .site-header .brand-logo:hover,
        .site-header .brand-logo:focus {
            color: var(--accent-cyan);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--primary-blue-2), var(--primary-blue-3));
            border-radius: 8px;
            color: var(--accent-cyan);
            font-size: 1rem;
            border: 1px solid var(--border-glow);
        }

        .header-search {
            flex: 1;
            max-width: 340px;
            margin: 0 16px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .search-icon {
            position: absolute;
            left: 12px;
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
            z-index: 1;
        }

        .header-search input {
            padding-left: 34px !important;
            height: 38px;
            font-size: 0.85rem !important;
        }

        .header-controls {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: auto;
            flex-shrink: 0;
        }

        .ver-group,
        .lang-group {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .control-label {
            font-size: 0.72rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

        .ver-group select,
        .lang-group select {
            max-width: 100px;
            padding: 5px 8px !important;
            font-size: 0.78rem !important;
            height: 32px;
            background: rgba(15, 26, 46, 0.8) !important;
        }

        .mobile-nav-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: rgba(15, 26, 46, 0.7);
            border: 1px solid var(--border-soft);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .mobile-nav-toggle:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.2);
        }

        /* ==================== Sidebar ==================== */
        .doc-sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: rgba(10, 18, 33, 0.82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-right: 1px solid var(--border-soft);
            overflow-y: auto;
            z-index: 90;
            padding: 18px 14px 18px 14px;
            transition: transform var(--transition-base);
        }

        .sidebar-heading {
            font-size: 0.68rem;
            font-weight: 700;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            padding-left: 10px;
        }

        .sidebar-group {
            margin-bottom: 16px;
        }

        .sidebar-group-title {
            display: flex;
            align-items: center;
            gap: 7px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 7px 10px;
            border-radius: 7px;
            transition: all var(--transition-fast);
            cursor: default;
        }

        .sidebar-group-title i {
            font-size: 0.7rem;
            color: var(--accent-cyan);
            width: 14px;
            text-align: center;
        }

        .sidebar-group-title:hover {
            background: rgba(17, 40, 71, 0.55);
            color: var(--text-primary);
        }

        .sidebar-sub-items {
            list-style: none;
            padding-left: 20px;
            margin-top: 4px;
        }

        .sidebar-sub-items li a {
            display: block;
            padding: 5px 10px;
            font-size: 0.78rem;
            color: var(--text-muted);
            border-radius: 6px;
            transition: all var(--transition-fast);
            border-left: 2px solid transparent;
        }

        .sidebar-sub-items li a:hover,
        .sidebar-sub-items li a:focus {
            color: var(--accent-cyan);
            background: rgba(17, 40, 71, 0.4);
            border-left-color: var(--accent-cyan);
        }

        .sidebar-sub-items li a.active {
            color: var(--accent-cyan);
            background: rgba(17, 40, 71, 0.55);
            border-left-color: var(--accent-cyan);
            font-weight: 600;
        }

        .sidebar-divider {
            height: 1px;
            background: var(--border-soft);
            margin: 14px 0;
        }

        .sidebar-nav-links {
            list-style: none;
        }

        .sidebar-nav-links li a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 10px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            border-radius: 7px;
            transition: all var(--transition-fast);
        }

        .sidebar-nav-links li a i {
            font-size: 0.75rem;
            color: var(--text-muted);
            width: 16px;
            text-align: center;
            transition: color var(--transition-fast);
        }

        .sidebar-nav-links li a:hover,
        .sidebar-nav-links li a:focus {
            background: rgba(17, 40, 71, 0.5);
            color: var(--text-primary);
        }

        .sidebar-nav-links li a:hover i,
        .sidebar-nav-links li a:focus i {
            color: var(--accent-cyan);
        }

        .sidebar-nav-links li a.active {
            background: rgba(17, 40, 71, 0.7);
            color: var(--accent-cyan);
            border: 1px solid var(--border-glow);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 85;
        }

        /* ==================== Main Content ==================== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            padding-top: var(--header-height);
            min-height: 100vh;
        }

        .page-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ==================== Breadcrumb ==================== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 14px 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* ==================== Section Base ==================== */
        .doc-section {
            padding: 28px 0 36px;
            border-bottom: 1px solid var(--border-soft);
        }

        .doc-section:last-child {
            border-bottom: none;
        }

        .section-heading {
            margin-bottom: 22px;
        }

        .section-heading h2 {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.01em;
            margin-bottom: 6px;
        }

        .section-heading p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ==================== Hero Title Area ==================== */
        .page-title-area {
            padding: 22px 0 10px;
        }

        .page-title-area h1 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .page-title-area .title-sub {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.75;
        }

        .title-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .title-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .title-meta i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
        }

        /* ==================== Search Filter Bar ==================== */
        .doc-filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            padding: 14px 16px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            border-radius: 10px;
            box-shadow: var(--shadow-dark);
        }

        .doc-filter-bar .filter-search {
            flex: 1;
            min-width: 220px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .filter-search .filter-icon {
            position: absolute;
            left: 12px;
            color: var(--text-muted);
            font-size: 0.8rem;
            pointer-events: none;
        }

        .filter-search input {
            padding-left: 34px !important;
        }

        .filter-select {
            min-width: 140px;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 12px;
            background: rgba(17, 40, 71, 0.6);
            border: 1px solid var(--border-soft);
            border-radius: 20px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            cursor: default;
        }

        .filter-tag:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* ==================== Doc Directory List ==================== */
        .doc-index-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--card-gap);
        }

        .doc-group-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            padding: 20px 18px;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
        }

        .doc-group-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.12), var(--shadow-dark);
            transform: translateY(-2px);
        }

        .doc-group-card .group-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-blue-2);
            border-radius: 8px;
            color: var(--accent-cyan);
            font-size: 0.95rem;
            margin-bottom: 12px;
            border: 1px solid var(--border-glow);
        }

        .doc-group-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: 0.01em;
        }

        .doc-group-card .group-desc {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .doc-group-card ul {
            list-style: none;
        }

        .doc-group-card ul li {
            padding: 5px 0;
            border-bottom: 1px solid rgba(0, 200, 255, 0.06);
        }

        .doc-group-card ul li:last-child {
            border-bottom: none;
        }

        .doc-group-card ul li a {
            font-size: 0.8rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition-fast);
        }

        .doc-group-card ul li a i {
            font-size: 0.6rem;
            color: var(--text-muted);
        }

        .doc-group-card ul li a:hover {
            color: var(--accent-cyan);
        }

        /* ==================== Quick Start Cards ==================== */
        .quickstart-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: var(--card-gap);
        }

        .quick-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
            display: flex;
            flex-direction: column;
        }

        .quick-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 20px rgba(0, 200, 255, 0.15), var(--shadow-dark);
            transform: translateY(-3px);
        }

        .quick-card .card-img {
            width: 100%;
            height: 140px;
            overflow: hidden;
        }

        .quick-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }

        .quick-card:hover .card-img img {
            transform: scale(1.05);
        }

        .quick-card .card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .quick-card .card-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            background: rgba(0, 200, 255, 0.12);
            border: 1px solid rgba(0, 200, 255, 0.3);
            border-radius: 20px;
            font-size: 0.68rem;
            color: var(--accent-cyan);
            margin-bottom: 10px;
            align-self: flex-start;
            font-weight: 600;
        }

        .quick-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .quick-card p {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 14px;
            flex: 1;
        }

        .quick-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: color var(--transition-fast);
        }

        .quick-card .card-link:hover {
            color: var(--accent-cyan-2);
        }

        /* ==================== Term Cards ==================== */
        .term-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 16px;
        }

        .term-card {
            background: rgba(15, 26, 46, 0.6);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            padding: 16px 18px;
            transition: all var(--transition-fast);
        }

        .term-card:hover {
            border-color: var(--border-glow);
            background: rgba(17, 40, 71, 0.5);
        }

        .term-card .term-name {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .term-card .term-name i {
            font-size: 0.7rem;
        }

        .term-card p {
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ==================== Data Metrics ==================== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
        }

        .metric-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            padding: 20px 18px;
            text-align: center;
            transition: all var(--transition-base);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
        }

        .metric-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.12);
        }

        .metric-card .metric-value {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: 0.02em;
            margin-bottom: 4px;
            font-family: var(--font-display);
        }

        .metric-card .metric-label {
            font-size: 0.72rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .metric-card .metric-delta {
            display: inline-flex;
            align-items: center;
            gap: 3px;
            font-size: 0.68rem;
            color: var(--accent-warm);
            margin-top: 6px;
            font-weight: 600;
        }

        /* ==================== Subscribe CTA ==================== */
        .subscribe-card {
            background: linear-gradient(135deg, rgba(15, 40, 71, 0.85), rgba(17, 28, 48, 0.85));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 0 24px rgba(0, 200, 255, 0.1), var(--shadow-dark);
        }

        .subscribe-card .sub-text {
            flex: 1;
            min-width: 260px;
        }

        .subscribe-card .sub-text h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .subscribe-card .sub-text p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .subscribe-card .sub-form {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            flex: 1;
            min-width: 260px;
        }

        .subscribe-card .sub-form input {
            flex: 1;
            min-width: 180px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--accent-cyan);
            color: #06121F;
            font-weight: 700;
            font-size: 0.85rem;
            border-radius: var(--radius-btn);
            transition: all var(--transition-base);
            box-shadow: var(--shadow-glow);
            letter-spacing: 0.01em;
            white-space: nowrap;
            border: 1px solid rgba(0, 200, 255, 0.5);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: #33D6FF;
            box-shadow: var(--shadow-glow-hover);
            color: #06121F;
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 20px;
            background: rgba(17, 40, 71, 0.7);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.82rem;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-glow);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-secondary:hover,
        .btn-secondary:focus {
            background: rgba(17, 64, 113, 0.8);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan-2);
            box-shadow: 0 0 14px rgba(0, 200, 255, 0.2);
        }

        /* ==================== Related Links ==================== */
        .related-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 14px;
        }

        .related-link-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            background: rgba(15, 26, 46, 0.55);
            border: 1px solid var(--border-soft);
            border-radius: 8px;
            transition: all var(--transition-fast);
            font-size: 0.78rem;
            color: var(--text-secondary);
        }

        .related-link-item i {
            color: var(--accent-cyan);
            font-size: 0.75rem;
            flex-shrink: 0;
        }

        .related-link-item:hover {
            border-color: var(--accent-cyan);
            color: var(--text-primary);
            background: rgba(17, 40, 71, 0.5);
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.1);
        }

        /* ==================== Footer ==================== */
        .site-footer {
            margin-left: var(--sidebar-width);
            background: rgba(6, 10, 18, 0.9);
            border-top: 1px solid var(--border-soft);
            padding: 32px 28px 24px;
        }

        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-top {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 20px;
        }

        .footer-brand .footer-logo {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .footer-brand p {
            font-size: 0.78rem;
            color: var(--text-muted);
            max-width: 300px;
            line-height: 1.6;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .footer-links a {
            font-size: 0.78rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 18px;
            font-size: 0.72rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-soft);
            padding-top: 16px;
        }

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

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

        /* ==================== Responsive ==================== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 240px;
            }

            .page-title-area h1 {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-pad: 48px;
            }

            .site-header {
                padding: 0 12px;
            }

            .site-header .brand-logo {
                font-size: 1rem;
                gap: 6px;
                margin-right: 8px;
            }

            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.8rem;
                border-radius: 6px;
            }

            .header-search {
                max-width: 140px;
                margin: 0 8px;
            }

            .header-controls .ver-group,
            .header-controls .lang-group {
                display: none;
            }

            .mobile-nav-toggle {
                display: flex;
            }

            .doc-sidebar {
                transform: translateX(-100%);
                width: 280px;
                z-index: 95;
                border-radius: 0 12px 12px 0;
            }

            .doc-sidebar.sidebar-open {
                transform: translateX(0);
                box-shadow: 8px 0 32px rgba(0, 0, 0, 0.5);
            }

            .sidebar-overlay.overlay-visible {
                display: block;
            }

            .main-wrapper,
            .site-footer {
                margin-left: 0;
            }

            .page-container {
                padding: 0 16px;
            }

            .page-title-area h1 {
                font-size: 1.4rem;
            }

            .page-title-area .title-sub {
                font-size: 0.85rem;
            }

            .section-heading h2 {
                font-size: 1.1rem;
            }

            .subscribe-card {
                padding: 22px 18px;
                flex-direction: column;
                align-items: stretch;
            }

            .doc-filter-bar {
                flex-direction: column;
                gap: 8px;
            }

            .doc-filter-bar .filter-search {
                min-width: 100%;
            }

            .filter-select {
                min-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .site-header {
                height: 54px;
            }

            .site-header .brand-logo span:not(.logo-icon) {
                font-size: 0.85rem;
            }

            .header-search input {
                font-size: 0.75rem !important;
                height: 32px;
            }

            .search-icon {
                font-size: 0.7rem;
                left: 8px;
            }

            .header-search input {
                padding-left: 28px !important;
            }

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

            .doc-index-grid {
                grid-template-columns: 1fr;
            }

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

            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .metric-card .metric-value {
                font-size: 1.4rem;
            }

            .related-links-grid {
                grid-template-columns: 1fr;
            }

            .footer-top {
                flex-direction: column;
                gap: 16px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #0D1322;
            --bg-card: #0F1A2E;
            --bg-panel: #111C31;
            --primary-blue-1: #0F2847;
            --primary-blue-2: #12335A;
            --primary-blue-3: #16406E;
            --accent-cyan: #00C8FF;
            --accent-cyan-2: #00E0FF;
            --accent-cyan-3: #00AED6;
            --accent-warm: #FFB84D;
            --text-primary: #F0F4FA;
            --text-secondary: #C6D3E3;
            --text-muted: #8A9BB8;
            --border-glow: rgba(0, 200, 255, 0.28);
            --border-soft: rgba(0, 200, 255, 0.12);
            --glass-bg: rgba(17, 28, 48, 0.72);
            --glass-dark: rgba(10, 16, 25, 0.55);
            --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 18px rgba(0, 200, 255, 0.35);
            --shadow-glow-hover: 0 0 26px rgba(0, 224, 255, 0.55);
            --radius-card: 12px;
            --radius-btn: 9px;
            --radius-input: 7px;
            --sidebar-width: 268px;
            --header-height: 64px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --font-display: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Inter', sans-serif;
            --section-pad: 72px;
            --card-gap: 24px;
        }

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

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-height) + 20px);
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-attachment: fixed;
            margin: 0;
            padding: 0;
        }

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

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

        a:hover,
        a:focus {
            color: var(--accent-cyan-2);
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .row {
            max-width: 100%;
        }
        .row .row {
            margin-left: 0;
            margin-right: 0;
        }

        a.button,
        button.button {
            font-family: var(--font-sans);
        }

        input,
        select,
        textarea {
            background: rgba(15, 26, 46, 0.85) !important;
            border: 1px solid rgba(0, 200, 255, 0.2) !important;
            border-radius: var(--radius-input) !important;
            color: var(--text-primary) !important;
            box-shadow: none !important;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast) !important;
            padding: 10px 14px !important;
            font-size: 0.9rem !important;
            height: auto !important;
            line-height: 1.5 !important;
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--accent-cyan) !important;
            box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.3), 0 0 12px rgba(0, 200, 255, 0.15) !important;
            outline: none !important;
        }

        select {
            -webkit-appearance: none;
            -moz-appearance: none;
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2300C8FF' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") !important;
            background-repeat: no-repeat !important;
            background-position: right 12px center !important;
            padding-right: 36px !important;
        }

        select option {
            background: #0F1A2E !important;
            color: #F0F4FA !important;
        }

        /* ==================== 顶栏 Header ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(6, 10, 18, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 200, 255, 0.14);
            z-index: 100;
            display: flex;
            align-items: center;
            padding: 0 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.38);
        }

        .site-header .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .site-header .brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: rgba(0, 200, 255, 0.14);
            border: 1px solid rgba(0, 200, 255, 0.3);
            color: var(--accent-cyan);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .site-header .brand-logo:hover .logo-icon {
            background: rgba(0, 200, 255, 0.22);
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.3);
        }

        .header-search {
            flex: 1;
            max-width: 420px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            gap: 8px;
            position: relative;
        }

        .header-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .header-search input {
            width: 100%;
            padding-left: 38px !important;
            padding-right: 16px !important;
            height: 38px !important;
            border-radius: 8px !important;
            background: rgba(15, 26, 46, 0.75) !important;
            border: 1px solid rgba(0, 200, 255, 0.18) !important;
            font-size: 0.85rem !important;
            color: var(--text-primary) !important;
        }

        .header-search input::placeholder {
            color: var(--text-muted) !important;
        }

        .header-controls {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
            margin-left: 16px;
        }

        .header-controls .ver-group,
        .header-controls .lang-group {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .header-controls .control-label {
            font-size: 0.72rem;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .header-controls select {
            height: 34px !important;
            padding: 4px 28px 4px 10px !important;
            font-size: 0.78rem !important;
            border-radius: 6px !important;
            background-color: rgba(15, 26, 46, 0.8) !important;
            border-color: rgba(0, 200, 255, 0.18) !important;
            color: var(--text-secondary) !important;
            min-width: 72px;
        }

        .mobile-nav-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: 8px;
            background: rgba(15, 26, 46, 0.8);
            border: 1px solid rgba(0, 200, 255, 0.18);
            color: var(--text-secondary);
            font-size: 1rem;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }

        .mobile-nav-toggle:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.2);
        }

        /* ==================== 左侧文档侧栏 ==================== */
        .doc-sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-right: 1px solid rgba(0, 200, 255, 0.1);
            padding: 20px 16px 40px;
            overflow-y: auto;
            z-index: 90;
            transition: transform 0.28s ease;
        }

        .doc-sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .doc-sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .doc-sidebar::-webkit-scrollbar-thumb {
            background: rgba(0, 200, 255, 0.2);
            border-radius: 4px;
        }

        .doc-sidebar .sidebar-label {
            font-size: 0.68rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            font-weight: 600;
            margin-bottom: 12px;
            padding-left: 4px;
        }

        .doc-sidebar .sidebar-nav {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .doc-sidebar .sidebar-nav li {
            margin-bottom: 2px;
        }

        .doc-sidebar .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 9px;
            padding: 10px 12px;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: 0.86rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border-left: 2px solid transparent;
        }

        .doc-sidebar .sidebar-nav a i {
            font-size: 0.78rem;
            width: 18px;
            text-align: center;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .doc-sidebar .sidebar-nav a:hover {
            background: rgba(15, 26, 46, 0.7);
            color: var(--text-primary);
            border-left-color: rgba(0, 200, 255, 0.4);
        }

        .doc-sidebar .sidebar-nav a:hover i {
            color: var(--accent-cyan);
        }

        .doc-sidebar .sidebar-nav a.active {
            background: rgba(0, 200, 255, 0.1);
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
        }

        .doc-sidebar .sidebar-nav a.active i {
            color: var(--accent-cyan);
        }

        .sidebar-subnav {
            list-style: none;
            margin: 4px 0 8px 26px;
            padding: 0;
            border-left: 1px solid rgba(0, 200, 255, 0.15);
        }

        .sidebar-subnav li a {
            font-size: 0.78rem;
            padding: 6px 12px;
            color: var(--text-muted);
            border-left: none !important;
        }

        .sidebar-subnav li a:hover {
            color: var(--text-secondary);
            border-left: none !important;
        }

        /* ==================== 主内容区域 ==================== */
        .main-wrapper {
            padding-top: var(--header-height);
            padding-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 32px 72px;
        }

        /* ==================== 面包屑 ==================== */
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .breadcrumb-nav a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb-nav .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb-nav .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        /* ==================== 页面标题区 ==================== */
        .page-title-section {
            margin-bottom: 32px;
        }

        .page-title-section .page-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 20px;
            background: rgba(0, 200, 255, 0.08);
            border: 1px solid rgba(0, 200, 255, 0.2);
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .page-title-section h1 {
            font-family: var(--font-display);
            font-size: clamp(1.7rem, 4vw, 2.6rem);
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.25;
            margin: 0 0 12px;
        }

        .page-title-section p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.8;
            margin: 0;
        }

        /* ==================== 玻璃拟态卡片 ==================== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            padding: 24px;
            transition: all var(--transition-base);
        }

        .glass-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 12px rgba(0, 200, 255, 0.12);
        }

        /* ==================== 筛选栏 ==================== */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            padding: 16px 20px;
            margin-bottom: 28px;
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .filter-bar .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-bar .filter-label {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .filter-bar select,
        .filter-bar input {
            height: 36px !important;
            min-width: 120px;
            font-size: 0.8rem !important;
            padding: 6px 30px 6px 10px !important;
            border-radius: 6px !important;
        }

        .filter-bar .filter-btn {
            padding: 8px 18px;
            border-radius: 7px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(15, 26, 46, 0.75);
            border: 1px solid rgba(0, 200, 255, 0.18);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-bar .filter-btn:hover,
        .filter-bar .filter-btn.active {
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.08);
            box-shadow: 0 0 10px rgba(0, 200, 255, 0.18);
        }

        /* ==================== 产品卡片网格 ==================== */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: var(--card-gap);
            margin-bottom: 40px;
        }

        .product-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all var(--transition-base);
        }

        .product-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 16px rgba(0, 200, 255, 0.15);
            transform: translateY(-2px);
        }

        .product-card .product-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: linear-gradient(135deg, #0F2847, #111C31);
        }

        .product-card .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .product-card .product-image .image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 14, 23, 0.85) 0%, rgba(10, 14, 23, 0.2) 60%, transparent 100%);
            pointer-events: none;
        }

        .product-card .product-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 10px;
            border-radius: 14px;
            font-size: 0.68rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            background: rgba(0, 200, 255, 0.18);
            border: 1px solid rgba(0, 200, 255, 0.3);
            color: var(--accent-cyan);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .product-card .product-tag.warm {
            background: rgba(255, 184, 77, 0.16);
            border-color: rgba(255, 184, 77, 0.3);
            color: var(--accent-warm);
        }

        .product-card .product-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .product-card .product-name {
            font-family: var(--font-display);
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px;
        }

        .product-card .product-version {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }

        .product-card .product-desc {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
            flex: 1;
        }

        .product-card .product-specs {
            list-style: none;
            margin: 0 0 16px;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .product-card .product-specs li {
            font-size: 0.72rem;
            color: var(--text-muted);
            background: rgba(15, 26, 46, 0.7);
            border: 1px solid rgba(0, 200, 255, 0.1);
            padding: 4px 10px;
            border-radius: 6px;
            white-space: nowrap;
        }

        .product-card .product-actions {
            display: flex;
            gap: 10px;
        }

        /* ==================== 按钮样式 ==================== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 0.84rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            white-space: nowrap;
            text-decoration: none;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent-cyan);
            color: #06121F;
            box-shadow: var(--shadow-glow);
            border-color: var(--accent-cyan);
        }

        .btn-primary:hover {
            background: #33D6FF;
            border-color: #33D6FF;
            box-shadow: var(--shadow-glow-hover);
            color: #06121F;
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-glow);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent-cyan);
            border-color: rgba(0, 200, 255, 0.4);
        }

        .btn-outline:hover {
            background: rgba(0, 200, 255, 0.08);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan-2);
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.18);
        }

        .btn-sm {
            padding: 7px 14px;
            font-size: 0.78rem;
            border-radius: 7px;
        }

        .btn-lg {
            padding: 13px 28px;
            font-size: 0.95rem;
            border-radius: 10px;
        }

        /* ==================== 规格对比表 ==================== */
        .spec-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-soft);
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            margin-bottom: 40px;
        }

        .spec-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 720px;
        }

        .spec-table th {
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: left;
            padding: 14px 16px;
            background: rgba(15, 26, 46, 0.9);
            border-bottom: 1px solid rgba(0, 200, 255, 0.2);
            letter-spacing: 0.02em;
        }

        .spec-table th:first-child {
            border-radius: var(--radius-card) 0 0 0;
        }
        .spec-table th:last-child {
            border-radius: 0 var(--radius-card) 0 0;
        }

        .spec-table td {
            font-size: 0.8rem;
            color: var(--text-secondary);
            padding: 12px 16px;
            border-bottom: 1px solid rgba(0, 200, 255, 0.06);
            text-align: left;
        }

        .spec-table tr:last-child td {
            border-bottom: none;
        }

        .spec-table tr:hover td {
            background: rgba(0, 200, 255, 0.04);
        }

        .spec-table td.spec-label {
            color: var(--text-primary);
            font-weight: 600;
            white-space: nowrap;
        }

        .spec-table td.spec-highlight {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* ==================== 版本亮点区 ==================== */
        .version-highlights {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--card-gap);
            margin-bottom: 40px;
        }

        .highlight-card {
            padding: 22px 24px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            transition: all var(--transition-base);
        }

        .highlight-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 10px 32px rgba(0, 0, 0, 0.48), 0 0 14px rgba(0, 200, 255, 0.12);
        }

        .highlight-card .highlight-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(0, 200, 255, 0.1);
            border: 1px solid rgba(0, 200, 255, 0.22);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.05rem;
            margin-bottom: 14px;
        }

        .highlight-card h3 {
            font-size: 0.96rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
        }

        .highlight-card p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ==================== 兼容性说明 ==================== */
        .compat-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--card-gap);
            margin-bottom: 40px;
        }

        .compat-panel {
            padding: 24px 26px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
        }

        .compat-panel h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compat-panel h3 i {
            color: var(--accent-cyan);
            font-size: 0.88rem;
        }

        .compat-panel ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .compat-panel ul li {
            font-size: 0.82rem;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid rgba(0, 200, 255, 0.06);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compat-panel ul li:last-child {
            border-bottom: none;
        }

        .compat-panel ul li .check-icon {
            color: var(--accent-cyan);
            font-size: 0.72rem;
            flex-shrink: 0;
        }

        .compat-panel ul li .check-icon.warn {
            color: var(--accent-warm);
        }

        /* ==================== CTA 转化区 ==================== */
        .cta-section {
            text-align: center;
            padding: 40px 32px;
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark), 0 0 30px rgba(0, 200, 255, 0.08);
            margin-bottom: 40px;
        }

        .cta-section h2 {
            font-family: var(--font-display);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px;
        }

        .cta-section p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }

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

        /* ==================== 相关评测/资讯链接区 ==================== */
        .related-links-section {
            margin-bottom: 40px;
        }

        .related-links-section .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 18px;
            flex-wrap: wrap;
            gap: 10px;
        }

        .related-links-section .section-heading h2 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }

        .related-links-section .section-heading .view-all-link {
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .related-links-section .section-heading .view-all-link:hover {
            color: var(--accent-cyan-2);
        }

        .related-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 16px;
        }

        .related-link-card {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 16px 18px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            box-shadow: var(--shadow-dark);
            transition: all var(--transition-base);
        }

        .related-link-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
        }

        .related-link-card .link-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: rgba(0, 200, 255, 0.08);
            border: 1px solid rgba(0, 200, 255, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 0.78rem;
            flex-shrink: 0;
        }

        .related-link-card .link-info h4 {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 4px;
        }

        .related-link-card .link-info p {
            font-size: 0.72rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.5;
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: rgba(6, 10, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 200, 255, 0.12);
            padding: 40px 32px 28px;
            margin-top: auto;
        }

        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-top {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 28px;
            margin-bottom: 24px;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-display);
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .footer-brand p {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
            max-width: 360px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .footer-links a {
            font-size: 0.78rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid rgba(0, 200, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 0.7rem;
            color: var(--text-muted);
        }

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

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

        /* ==================== 侧栏遮罩 ==================== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 85;
            opacity: 0;
            transition: opacity 0.28s ease;
        }

        .sidebar-overlay.active {
            opacity: 1;
        }

        /* ==================== 响应式断点 ==================== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 240px;
                --section-pad: 56px;
            }
            .main-content {
                padding: 32px 24px 56px;
            }
            .compat-section {
                grid-template-columns: 1fr;
            }
            .header-search {
                max-width: 300px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --section-pad: 48px;
            }
            .site-header {
                padding: 0 16px;
            }
            .header-search {
                display: none;
            }
            .header-controls .ver-group,
            .header-controls .lang-group {
                display: none;
            }
            .mobile-nav-toggle {
                display: flex;
            }
            .doc-sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 8px 0 32px rgba(0, 0, 0, 0.5);
            }
            .doc-sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }
            .sidebar-overlay.active {
                pointer-events: auto;
            }
            .main-wrapper {
                padding-left: 0;
            }
            .main-content {
                padding: 20px 16px 48px;
            }
            .product-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .version-highlights {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
            }
            .filter-bar .filter-group {
                flex-wrap: wrap;
            }
            .cta-section {
                padding: 28px 20px;
            }
            .footer-top {
                flex-direction: column;
                gap: 18px;
            }
            .footer-links {
                gap: 10px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
            .related-links-grid {
                grid-template-columns: 1fr;
            }
            .product-card .product-body {
                padding: 16px 18px 18px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-pad: 36px;
            }
            .site-header {
                padding: 0 12px;
                height: 56px;
            }
            :root {
                --header-height: 56px;
            }
            .site-header .brand-logo {
                font-size: 0.95rem;
            }
            .site-header .brand-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
            }
            .main-content {
                padding: 16px 12px 40px;
            }
            .page-title-section h1 {
                font-size: 1.4rem;
            }
            .page-title-section p {
                font-size: 0.82rem;
            }
            .product-card .product-actions {
                flex-direction: column;
            }
            .product-card .product-actions .btn {
                width: 100%;
            }
            .btn-lg {
                padding: 11px 20px;
                font-size: 0.88rem;
            }
            .cta-section .cta-actions {
                flex-direction: column;
            }
            .cta-section .cta-actions .btn {
                width: 100%;
            }
        }

/* roulang page: category4 */
:root {
        --bg-primary: #0A0E17;
        --bg-secondary: #0D1322;
        --bg-card: #0F1A2E;
        --bg-panel: #111C31;
        --primary-blue-1: #0F2847;
        --primary-blue-2: #12335A;
        --primary-blue-3: #16406E;
        --accent-cyan: #00C8FF;
        --accent-cyan-2: #00E0FF;
        --accent-cyan-3: #00AED6;
        --accent-warm: #FFB84D;
        --text-primary: #F0F4FA;
        --text-secondary: #C6D3E3;
        --text-muted: #8A9BB8;
        --border-glow: rgba(0, 200, 255, 0.28);
        --border-soft: rgba(0, 200, 255, 0.12);
        --glass-bg: rgba(17, 28, 48, 0.72);
        --glass-dark: rgba(10, 16, 25, 0.55);
        --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.45);
        --shadow-glow: 0 0 18px rgba(0, 200, 255, 0.35);
        --shadow-glow-hover: 0 0 26px rgba(0, 224, 255, 0.55);
        --radius-card: 12px;
        --radius-btn: 9px;
        --radius-input: 7px;
        --sidebar-width: 268px;
        --header-height: 64px;
        --transition-fast: 0.18s ease;
        --transition-base: 0.25s ease;
        --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
        --font-display: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Inter', sans-serif;
        --section-pad: 72px;
        --card-gap: 24px;
    }
    html {
        font-size: 16px;
        scroll-behavior: smooth;
        scroll-padding-top: calc(var(--header-height) + 20px);
    }
    body {
        font-family: var(--font-sans);
        background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
        background-attachment: fixed;
        color: var(--text-primary);
        line-height: 1.7;
        min-height: 100vh;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        margin: 0;
        padding: 0;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: var(--accent-cyan);
        text-decoration: none;
        transition: color var(--transition-fast);
    }
    a:hover,
    a:focus {
        color: var(--accent-cyan-2);
        outline: none;
    }
    a:focus-visible {
        outline: 2px solid var(--accent-cyan);
        outline-offset: 3px;
    }
    button,
    input,
    select,
    textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }

    /* Foundation 覆盖 */
    .row {
        max-width: 100%;
    }
    .row .row {
        margin-left: 0;
        margin-right: 0;
    }
    a.button,
    button.button {
        font-family: var(--font-sans);
    }
    .accordion .accordion-title {
        background: var(--glass-bg);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-card);
        color: var(--text-primary);
        font-size: 0.98rem;
        font-weight: 600;
        padding: 16px 20px;
        transition: all var(--transition-base);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
    }
    .accordion .accordion-title:hover,
    .accordion .accordion-title:focus {
        background: rgba(17, 40, 71, 0.85);
        border-color: var(--border-glow);
        color: var(--accent-cyan-2);
    }
    .accordion .accordion-item.is-active .accordion-title {
        background: rgba(17, 40, 71, 0.9);
        border-color: var(--accent-cyan);
        color: var(--accent-cyan-2);
    }
    input, select, textarea {
        background: rgba(15, 26, 46, 0.85) !important;
        border: 1px solid rgba(0, 200, 255, 0.2) !important;
        border-radius: var(--radius-input) !important;
        color: var(--text-primary) !important;
        box-shadow: none !important;
        transition: border-color var(--transition-fast), box-shadow var(--transition-fast) !important;
        padding: 10px 14px !important;
        font-size: 0.9rem !important;
    }
    input:focus, select:focus, textarea:focus {
        border-color: var(--accent-cyan) !important;
        box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.3), 0 0 12px rgba(0, 200, 255, 0.15) !important;
        outline: none !important;
    }

    /* ==================== 布局骨架 ==================== */
    .page-wrapper {
        display: flex;
        min-height: 100vh;
        padding-top: var(--header-height);
    }

    /* ==================== 顶栏 ==================== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-height);
        background: rgba(6, 10, 18, 0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(0, 200, 255, 0.14);
        z-index: 100;
        display: flex;
        align-items: center;
        padding: 0 24px;
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.38);
    }
    .brand-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 1.25rem;
        color: var(--text-primary);
        letter-spacing: 0.02em;
    }
    .brand-logo .logo-icon {
        color: var(--accent-cyan);
        font-size: 1.5rem;
    }
    .header-search {
        display: flex;
        align-items: center;
        flex: 0 1 380px;
        margin: 0 24px 0 48px;
        position: relative;
    }
    .header-search .search-icon {
        position: absolute;
        left: 12px;
        color: var(--text-muted);
        font-size: 0.9rem;
    }
    .header-search input {
        width: 100%;
        padding-left: 32px !important;
        background: rgba(17, 28, 48, 0.7) !important;
    }
    .header-controls {
        display: flex;
        align-items: center;
        gap: 16px;
        margin-left: auto;
    }
    .ver-group,
    .lang-group {
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text-muted);
        font-size: 0.85rem;
    }
    .ver-group select,
    .lang-group select {
        width: auto;
        padding: 8px 10px !important;
        background: rgba(17, 28, 48, 0.9) !important;
    }
    .mobile-nav-toggle {
        display: none;
        color: var(--text-primary);
        font-size: 1.4rem;
        background: transparent;
        border: 1px solid var(--border-soft);
        border-radius: 6px;
        padding: 4px 10px;
        transition: all var(--transition-fast);
    }
    .mobile-nav-toggle:hover {
        border-color: var(--accent-cyan);
        color: var(--accent-cyan);
    }

    /* ==================== 左侧侧栏 ==================== */
    .doc-sidebar {
        width: var(--sidebar-width);
        background: rgba(13, 19, 34, 0.85);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-right: 1px solid rgba(0, 200, 255, 0.1);
        position: fixed;
        top: var(--header-height);
        bottom: 0;
        left: 0;
        overflow-y: auto;
        padding: 20px 16px 40px;
        z-index: 90;
        transition: transform var(--transition-base);
    }
    .doc-sidebar .sidebar-title {
        font-size: 0.85rem;
        font-weight: 700;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        color: var(--text-muted);
        margin: 16px 8px 10px;
    }
    .sidebar-nav {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .sidebar-nav li {
        margin-bottom: 4px;
    }
    .sidebar-nav a {
        display: block;
        padding: 10px 12px;
        border-radius: 8px;
        color: var(--text-secondary);
        font-weight: 500;
        transition: all var(--transition-fast);
        position: relative;
    }
    .sidebar-nav a:hover,
    .sidebar-nav a:focus {
        background: rgba(0, 200, 255, 0.08);
        color: var(--accent-cyan-2);
    }
    .sidebar-nav a.active {
        background: rgba(0, 200, 255, 0.12);
        color: var(--accent-cyan-2);
        box-shadow: inset 0 0 0 1px rgba(0, 200, 255, 0.25);
    }
    .sidebar-nav a.active::before {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 3px;
        height: 20px;
        background: var(--accent-cyan);
        border-radius: 0 2px 2px 0;
        box-shadow: 0 0 10px rgba(0, 200, 255, 0.5);
    }
    .sidebar-subnav {
        list-style: none;
        margin: 4px 0 8px 18px;
        padding: 0;
        border-left: 1px solid rgba(0, 200, 255, 0.15);
    }
    .sidebar-subnav li a {
        font-size: 0.88rem;
        padding: 6px 10px;
        color: var(--text-muted);
    }
    .sidebar-subnav li a:hover {
        color: var(--accent-cyan);
    }

    /* ==================== 主内容区 ==================== */
    .main-content {
        flex: 1;
        margin-left: var(--sidebar-width);
        padding: 32px 40px 80px;
        width: calc(100% - var(--sidebar-width));
    }

    /* ==================== 移动端抽屉 ==================== */
    .mobile-drawer {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 14, 23, 0.98);
        z-index: 95;
        padding: 24px;
        overflow-y: auto;
        display: none;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    .mobile-drawer.is-open {
        display: block;
        transform: translateX(0);
    }
    .mobile-drawer .sidebar-nav a {
        font-size: 1.05rem;
        padding: 14px 16px;
    }
    .mobile-drawer .drawer-close {
        display: block;
        margin-bottom: 20px;
        color: var(--text-muted);
        background: transparent;
        border: 1px solid var(--border-soft);
        border-radius: 8px;
        padding: 6px 12px;
        font-size: 1rem;
    }
    .mobile-drawer .drawer-close:hover {
        color: var(--accent-cyan);
        border-color: var(--accent-cyan);
    }

    /* ==================== 面包屑 ==================== */
    .breadcrumb {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 6px;
        font-size: 0.9rem;
        color: var(--text-muted);
        margin-bottom: 16px;
    }
    .breadcrumb a {
        color: var(--text-secondary);
    }
    .breadcrumb a:hover {
        color: var(--accent-cyan);
    }
    .breadcrumb .separator {
        opacity: 0.6;
    }
    .breadcrumb .current {
        color: var(--accent-cyan);
        font-weight: 600;
    }

    /* ==================== 页面内容样式 ==================== */
    .page-title-block {
        margin-bottom: 32px;
    }
    .page-title-block h1 {
        font-family: var(--font-display);
        font-size: 2.2rem;
        font-weight: 700;
        margin: 0 0 8px 0;
        color: var(--text-primary);
        letter-spacing: 0.01em;
    }
    .page-title-block .page-summary {
        font-size: 1.05rem;
        color: var(--text-secondary);
        max-width: 800px;
        margin: 0;
    }

    .filter-bar {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-wrap: wrap;
        margin-bottom: 32px;
        padding: 16px 18px;
        background: var(--glass-bg);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-card);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
    }
    .filter-bar .filter-label {
        color: var(--text-muted);
        font-size: 0.85rem;
        font-weight: 600;
    }
    .filter-bar select {
        width: auto;
        padding: 8px 28px 8px 12px !important;
    }
    .filter-bar .filter-btn {
        background: rgba(0, 200, 255, 0.12);
        color: var(--accent-cyan);
        border: 1px solid var(--border-glow);
        border-radius: var(--radius-btn);
        padding: 8px 16px;
        font-weight: 600;
        font-size: 0.85rem;
        transition: all var(--transition-fast);
    }
    .filter-bar .filter-btn:hover {
        background: rgba(0, 200, 255, 0.22);
        box-shadow: 0 0 12px rgba(0, 200, 255, 0.25);
    }

    .news-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: var(--card-gap);
        margin-bottom: 48px;
    }
    .news-card {
        background: var(--glass-bg);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-card);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        box-shadow: var(--shadow-dark);
        transition: all var(--transition-base);
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }
    .news-card:hover {
        border-color: var(--border-glow);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.55), 0 0 18px rgba(0, 200, 255, 0.15);
        transform: translateY(-3px);
    }
    .news-card .news-image {
        width: 100%;
        height: 180px;
        object-fit: cover;
        border-bottom: 1px solid var(--border-soft);
    }
    .news-card .news-body {
        padding: 20px 22px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .news-card .news-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 0.8rem;
        color: var(--text-muted);
        margin-bottom: 10px;
    }
    .news-card .news-tag {
        background: rgba(0, 200, 255, 0.1);
        color: var(--accent-cyan-2);
        padding: 2px 8px;
        border-radius: 20px;
        font-size: 0.75rem;
        font-weight: 600;
    }
    .news-card h3 {
        font-size: 1.2rem;
        font-weight: 600;
        margin: 0 0 10px 0;
        color: var(--text-primary);
        line-height: 1.4;
    }
    .news-card .news-excerpt {
        color: var(--text-secondary);
        font-size: 0.9rem;
        margin: 0 0 16px 0;
        flex: 1;
    }
    .news-card .news-link {
        align-self: flex-start;
        font-weight: 600;
        color: var(--accent-cyan);
        font-size: 0.9rem;
    }
    .news-card .news-link:hover {
        color: var(--accent-cyan-2);
    }

    .sidebar-panel {
        background: var(--glass-bg);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-card);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        box-shadow: var(--shadow-dark);
        padding: 20px;
        margin-bottom: 24px;
    }
    .sidebar-panel h3 {
        font-size: 1.1rem;
        font-weight: 600;
        margin: 0 0 16px 0;
        color: var(--accent-cyan-2);
    }
    .hot-list {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .hot-list li {
        padding: 10px 0;
        border-bottom: 1px solid rgba(0, 200, 255, 0.08);
    }
    .hot-list li:last-child {
        border-bottom: none;
    }
    .hot-list a {
        color: var(--text-secondary);
        font-size: 0.92rem;
        display: block;
        transition: color var(--transition-fast);
    }
    .hot-list a:hover {
        color: var(--accent-cyan);
    }
    .hot-list .hot-rank {
        display: inline-block;
        width: 22px;
        height: 22px;
        background: rgba(0, 200, 255, 0.15);
        border-radius: 50%;
        text-align: center;
        line-height: 22px;
        font-size: 0.75rem;
        font-weight: 700;
        color: var(--accent-cyan);
        margin-right: 8px;
    }

    .monthly-archive {
        background: var(--glass-bg);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-card);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        box-shadow: var(--shadow-dark);
        padding: 28px;
        margin-bottom: 48px;
    }
    .monthly-archive h2 {
        font-size: 1.5rem;
        font-weight: 700;
        margin: 0 0 20px 0;
        color: var(--text-primary);
    }
    .archive-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }
    .archive-month {
        background: rgba(15, 26, 46, 0.7);
        border: 1px solid var(--border-soft);
        border-radius: 8px;
        padding: 12px 16px;
        text-align: center;
        color: var(--text-secondary);
        transition: all var(--transition-fast);
    }
    .archive-month:hover {
        border-color: var(--accent-cyan);
        color: var(--accent-cyan);
        box-shadow: 0 0 12px rgba(0, 200, 255, 0.15);
    }
    .archive-month .month-name {
        font-weight: 600;
        font-size: 1rem;
    }
    .archive-month .post-count {
        font-size: 0.8rem;
        color: var(--text-muted);
    }

    .subscribe-section {
        background: linear-gradient(135deg, rgba(0,200,255,0.08), rgba(0,174,214,0.05));
        border: 1px solid var(--border-glow);
        border-radius: var(--radius-card);
        padding: 32px 28px;
        margin-bottom: 48px;
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .subscribe-section h2 {
        font-size: 1.6rem;
        font-weight: 700;
        color: var(--text-primary);
        margin: 0 0 8px 0;
    }
    .subscribe-section p {
        color: var(--text-secondary);
        max-width: 560px;
        margin: 0 auto 20px;
    }
    .subscribe-form {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .subscribe-form input {
        width: 280px;
    }
    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: var(--accent-cyan);
        color: #06121F !important;
        border-radius: var(--radius-btn);
        padding: 11px 24px;
        font-weight: 700;
        font-size: 0.95rem;
        letter-spacing: 0.02em;
        box-shadow: var(--shadow-glow);
        transition: all var(--transition-base);
        border: 1px solid rgba(0, 224, 255, 0.3);
    }
    .btn-primary:hover {
        background: #33D6FF;
        box-shadow: var(--shadow-glow-hover);
        transform: translateY(-2px);
        color: #06121F !important;
    }

    .trending-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 16px;
    }
    .trending-tags .tag {
        background: rgba(0, 200, 255, 0.08);
        color: var(--text-secondary);
        border: 1px solid var(--border-soft);
        border-radius: 20px;
        padding: 4px 12px;
        font-size: 0.8rem;
        transition: all var(--transition-fast);
    }
    .trending-tags .tag:hover {
        background: rgba(0, 200, 255, 0.15);
        color: var(--accent-cyan);
        border-color: var(--border-glow);
    }

    /* ==================== 页脚 ==================== */
    .site-footer {
        background: rgba(6, 10, 18, 0.9);
        border-top: 1px solid rgba(0, 200, 255, 0.1);
        padding: 40px 24px 24px;
        margin-left: var(--sidebar-width);
        width: calc(100% - var(--sidebar-width));
    }
    .footer-inner {
        max-width: 1200px;
        margin: 0 auto;
    }
    .footer-top {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 32px;
        margin-bottom: 28px;
    }
    .footer-brand .footer-logo {
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 1.3rem;
        color: var(--text-primary);
        margin-bottom: 6px;
    }
    .footer-brand p {
        color: var(--text-muted);
        font-size: 0.9rem;
        margin: 0;
    }
    .footer-links {
        display: flex;
        flex-wrap: wrap;
        gap: 16px 24px;
    }
    .footer-links a {
        color: var(--text-secondary);
        font-size: 0.9rem;
    }
    .footer-links a:hover {
        color: var(--accent-cyan);
    }
    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        padding-top: 20px;
        border-top: 1px solid rgba(0, 200, 255, 0.08);
        color: var(--text-muted);
        font-size: 0.8rem;
    }
    .footer-bottom a {
        color: var(--text-muted);
    }
    .footer-bottom a:hover {
        color: var(--accent-cyan);
    }

    /* ==================== 响应式 ==================== */
    @media (max-width: 1024px) {
        :root {
            --sidebar-width: 240px;
        }
        .main-content {
            padding: 24px;
        }
        .site-footer {
            margin-left: var(--sidebar-width);
            width: calc(100% - var(--sidebar-width));
        }
    }
    @media (max-width: 768px) {
        .doc-sidebar {
            display: none;
        }
        .main-content {
            margin-left: 0;
            width: 100%;
            padding: 20px 16px 60px;
        }
        .site-footer {
            margin-left: 0;
            width: 100%;
            padding: 32px 16px 20px;
        }
        .header-search {
            display: none;
        }
        .header-controls .ver-group,
        .header-controls .lang-group {
            display: none;
        }
        .mobile-nav-toggle {
            display: block;
        }
        .page-title-block h1 {
            font-size: 1.8rem;
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .archive-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .subscribe-form {
            flex-direction: column;
            align-items: stretch;
        }
        .subscribe-form input {
            width: 100%;
        }
    }
    @media (max-width: 520px) {
        .page-title-block h1 {
            font-size: 1.6rem;
        }
        .filter-bar {
            flex-direction: column;
            align-items: flex-start;
        }
        .archive-grid {
            grid-template-columns: 1fr;
        }
        .footer-top {
            flex-direction: column;
        }
        .footer-links {
            gap: 12px 16px;
        }
    }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #0D1322;
            --bg-card: #0F1A2E;
            --bg-panel: #111C31;
            --primary-blue-1: #0F2847;
            --primary-blue-2: #12335A;
            --primary-blue-3: #16406E;
            --accent-cyan: #00C8FF;
            --accent-cyan-2: #00E0FF;
            --accent-cyan-3: #00AED6;
            --accent-warm: #FFB84D;
            --text-primary: #F0F4FA;
            --text-secondary: #C6D3E3;
            --text-muted: #8A9BB8;
            --border-glow: rgba(0, 200, 255, 0.28);
            --border-soft: rgba(0, 200, 255, 0.12);
            --glass-bg: rgba(17, 28, 48, 0.72);
            --glass-dark: rgba(10, 16, 25, 0.55);
            --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 18px rgba(0, 200, 255, 0.35);
            --shadow-glow-hover: 0 0 26px rgba(0, 224, 255, 0.55);
            --radius-card: 12px;
            --radius-btn: 9px;
            --radius-input: 7px;
            --sidebar-width: 268px;
            --header-height: 64px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --font-display: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Inter', sans-serif;
            --section-pad: 72px;
            --card-gap: 24px;
        }

        @media (max-width: 64em) {
            :root {
                --section-pad: 56px;
                --sidebar-width: 240px;
            }
        }

        @media (max-width: 40em) {
            :root {
                --sidebar-width: 0px;
                --section-pad: 48px;
            }
        }

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-height) + 20px);
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-attachment: fixed;
        }

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

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

        a:hover,
        a:focus {
            color: var(--accent-cyan-2);
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .row {
            max-width: 100%;
        }

        .row .row {
            margin-left: 0;
            margin-right: 0;
        }

        a.button,
        button.button {
            font-family: var(--font-sans);
        }

        .accordion .accordion-title {
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            color: var(--text-primary);
            font-size: 0.98rem;
            font-weight: 600;
            padding: 16px 20px;
            transition: all var(--transition-base);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .accordion .accordion-title:hover,
        .accordion .accordion-title:focus {
            background: rgba(17, 40, 71, 0.85);
            border-color: var(--border-glow);
            color: var(--accent-cyan-2);
        }

        .accordion .accordion-item.is-active .accordion-title {
            background: rgba(17, 40, 71, 0.9);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan-2);
        }

        input,
        select,
        textarea {
            background: rgba(15, 26, 46, 0.85) !important;
            border: 1px solid rgba(0, 200, 255, 0.2) !important;
            border-radius: var(--radius-input) !important;
            color: var(--text-primary) !important;
            box-shadow: none !important;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast) !important;
            padding: 10px 14px !important;
            font-size: 0.9rem !important;
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--accent-cyan) !important;
            box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.3), 0 0 12px rgba(0, 200, 255, 0.15) !important;
            outline: none !important;
        }

        /* ==================== 顶栏 Header ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(6, 10, 18, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 200, 255, 0.14);
            z-index: 100;
            display: flex;
            align-items: center;
            padding: 0 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.38);
        }

        .site-header .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-primary);
            flex-shrink: 0;
            letter-spacing: 0.01em;
        }

        .site-header .brand-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: rgba(0, 200, 255, 0.12);
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1rem;
        }

        .site-header .brand-logo:hover {
            color: var(--text-primary);
        }

        .header-search {
            flex: 1;
            max-width: 380px;
            margin-left: 32px;
            position: relative;
        }

        .header-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .header-search input {
            width: 100%;
            padding-left: 38px !important;
            background: rgba(15, 26, 46, 0.65) !important;
            border: 1px solid rgba(0, 200, 255, 0.16) !important;
            border-radius: 8px !important;
            color: var(--text-primary) !important;
            font-size: 0.88rem !important;
            padding-top: 9px !important;
            padding-bottom: 9px !important;
        }

        .header-controls {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-left: auto;
            flex-shrink: 0;
        }

        .header-controls .ver-group,
        .header-controls .lang-group {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .header-controls .control-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .header-controls select {
            background: rgba(15, 26, 46, 0.75) !important;
            border: 1px solid rgba(0, 200, 255, 0.18) !important;
            border-radius: 6px !important;
            color: var(--text-secondary) !important;
            font-size: 0.8rem !important;
            padding: 5px 8px !important;
            cursor: pointer;
        }

        .mobile-nav-toggle {
            display: none;
            color: var(--text-primary);
            font-size: 1.3rem;
            padding: 6px;
            border-radius: 6px;
            transition: background var(--transition-fast);
        }

        .mobile-nav-toggle:hover {
            background: rgba(0, 200, 255, 0.1);
        }

        /* ==================== 布局容器 ==================== */
        .page-layout {
            display: flex;
            padding-top: var(--header-height);
            min-height: calc(100vh - var(--header-height));
        }

        /* ==================== 左侧侧边栏 ==================== */
        .sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: rgba(13, 19, 34, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-right: 1px solid rgba(0, 200, 255, 0.1);
            padding: 24px 16px;
            overflow-y: auto;
            z-index: 90;
            transition: transform var(--transition-base);
        }

        .sidebar::-webkit-scrollbar {
            width: 4px;
        }

        .sidebar::-webkit-scrollbar-thumb {
            background: rgba(0, 200, 255, 0.3);
            border-radius: 2px;
        }

        .sidebar-title {
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin: 0 0 12px 8px;
        }

        .sidebar-nav {
            list-style: none;
            margin: 0 0 24px 0;
            padding: 0;
        }

        .sidebar-nav li {
            margin-bottom: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .sidebar-nav a:hover {
            background: rgba(0, 200, 255, 0.06);
            color: var(--text-primary);
        }

        .sidebar-nav a:hover i {
            color: var(--accent-cyan);
        }

        .sidebar-nav a.active {
            background: rgba(0, 200, 255, 0.1);
            border-color: var(--border-glow);
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .sidebar-nav a.active i {
            color: var(--accent-cyan);
        }

        .sidebar-subnav {
            list-style: none;
            margin: 4px 0 16px 28px;
            padding: 0;
            border-left: 1px solid rgba(0, 200, 255, 0.12);
            padding-left: 12px;
        }

        .sidebar-subnav li {
            margin-bottom: 2px;
        }

        .sidebar-subnav a {
            padding: 6px 10px;
            font-size: 0.82rem;
            color: var(--text-muted);
            border: none;
            border-radius: 6px;
        }

        .sidebar-subnav a:hover {
            color: var(--text-secondary);
            background: rgba(0, 200, 255, 0.04);
        }

        .sidebar-subnav a.active {
            color: var(--accent-cyan);
            background: transparent;
            border: none;
        }

        .sidebar-divider {
            border-top: 1px solid rgba(0, 200, 255, 0.08);
            margin: 16px 0;
        }

        /* ==================== 主内容区 ==================== */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            padding: 32px 40px 64px;
            min-width: 0;
        }

        /* ==================== 面包屑 ==================== */
        .breadcrumbs {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumbs a {
            color: var(--accent-cyan-3);
            transition: color var(--transition-fast);
        }

        .breadcrumbs a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumbs .separator {
            color: rgba(0, 200, 255, 0.3);
        }

        .breadcrumbs .current {
            color: var(--text-secondary);
        }

        /* ==================== 页头区 ==================== */
        .page-hero {
            margin-bottom: 36px;
            padding: 32px 36px;
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-dark);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 260px;
            height: 260px;
            background: radial-gradient(ellipse at top right, rgba(0, 200, 255, 0.08), transparent 70%);
            pointer-events: none;
        }

        .page-hero h1 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            margin: 0 0 12px;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .page-hero .hero-lede {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin: 0 0 16px;
            max-width: 760px;
            line-height: 1.8;
        }

        .page-hero .hero-meta {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .page-hero .hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .page-hero .hero-meta i {
            color: var(--accent-cyan);
            font-size: 0.75rem;
        }

        /* ==================== 通用板块样式 ==================== */
        .section-block {
            margin-bottom: 52px;
        }

        .section-block:last-child {
            margin-bottom: 0;
        }

        .section-head {
            margin-bottom: 24px;
        }

        .section-head h2 {
            font-family: var(--font-display);
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
            letter-spacing: -0.005em;
            line-height: 1.4;
        }

        .section-head .section-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin: 0;
            max-width: 680px;
            line-height: 1.7;
        }

        /* ==================== 场景筛选栏 ==================== */
        .scenario-filter {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            padding: 18px 22px;
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-dark);
        }

        .scenario-filter .filter-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 600;
            flex-shrink: 0;
            letter-spacing: 0.03em;
        }

        .filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            flex: 1;
        }

        .filter-tag {
            padding: 6px 14px;
            border-radius: 20px;
            background: rgba(15, 26, 46, 0.7);
            border: 1px solid rgba(0, 200, 255, 0.15);
            color: var(--text-secondary);
            font-size: 0.82rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-tag:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.06);
        }

        .filter-tag.active {
            background: rgba(0, 200, 255, 0.14);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan-2);
            font-weight: 600;
        }

        /* ==================== 场景卡片网格 ==================== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .scenario-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .scenario-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 36px rgba(0, 0, 0, 0.5), 0 0 18px rgba(0, 200, 255, 0.15);
            transform: translateY(-3px);
        }

        .scenario-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .scenario-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .scenario-card:hover .card-img img {
            transform: scale(1.05);
        }

        .scenario-card .card-img .img-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 14, 23, 0.7) 100%);
        }

        .scenario-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .scenario-card .card-badge {
            display: inline-block;
            padding: 4px 10px;
            background: rgba(0, 200, 255, 0.1);
            border: 1px solid rgba(0, 200, 255, 0.2);
            border-radius: 4px;
            color: var(--accent-cyan);
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .scenario-card h3 {
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .scenario-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin: 0 0 16px;
            line-height: 1.65;
            flex: 1;
        }

        .scenario-card .card-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-fast);
        }

        .scenario-card .card-link i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }

        .scenario-card .card-link:hover {
            color: var(--accent-cyan-2);
        }

        .scenario-card .card-link:hover i {
            transform: translateX(3px);
        }

        /* ==================== 特性匹配区 ==================== */
        .feature-match-table {
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .feature-match-row {
            display: grid;
            grid-template-columns: 1.2fr 1.5fr 2fr;
            gap: 0;
            border-bottom: 1px solid rgba(0, 200, 255, 0.06);
        }

        .feature-match-row:last-child {
            border-bottom: none;
        }

        .feature-match-row .fm-cell {
            padding: 16px 20px;
            font-size: 0.88rem;
            line-height: 1.6;
        }

        .feature-match-row .fm-cell:first-child {
            font-weight: 600;
            color: var(--text-primary);
            background: rgba(15, 26, 46, 0.5);
        }

        .feature-match-row .fm-cell:nth-child(2) {
            color: var(--accent-cyan);
            font-weight: 500;
            border-left: 1px solid rgba(0, 200, 255, 0.06);
        }

        .feature-match-row .fm-cell:nth-child(3) {
            color: var(--text-secondary);
            border-left: 1px solid rgba(0, 200, 255, 0.06);
        }

        .feature-match-row .fm-header {
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--text-muted);
            background: rgba(15, 26, 46, 0.65);
        }

        /* ==================== 适用人群区 ==================== */
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }

        .audience-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            padding: 22px 24px;
            box-shadow: var(--shadow-dark);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: all var(--transition-base);
        }

        .audience-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 6px 28px rgba(0, 0, 0, 0.45), 0 0 14px rgba(0, 200, 255, 0.12);
        }

        .audience-card .audience-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(0, 200, 255, 0.1);
            border: 1px solid rgba(0, 200, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .audience-card h3 {
            font-family: var(--font-display);
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
        }

        .audience-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.65;
        }

        /* ==================== 典型案例数据区 ==================== */
        .case-data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .case-data-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            padding: 20px 18px;
            text-align: center;
            box-shadow: var(--shadow-dark);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: all var(--transition-base);
        }

        .case-data-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4), 0 0 12px rgba(0, 200, 255, 0.12);
        }

        .case-data-card .data-number {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 0 0 4px;
            line-height: 1.2;
        }

        .case-data-card .data-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0 0 6px;
        }

        .case-data-card .data-note {
            font-size: 0.72rem;
            color: var(--text-muted);
            opacity: 0.7;
            margin: 0;
        }

        /* ==================== 场景提交CTA ==================== */
        .scenario-cta {
            background: var(--glass-bg);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-card);
            padding: 36px;
            box-shadow: var(--shadow-dark), 0 0 24px rgba(0, 200, 255, 0.08);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .scenario-cta .cta-copy h2 {
            font-family: var(--font-display);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px;
            line-height: 1.4;
        }

        .scenario-cta .cta-copy p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .scenario-cta .cta-copy .cta-highlight {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .cta-form-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        .cta-form-group input {
            flex: 1;
            min-width: 200px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--accent-cyan);
            color: #06121F;
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: var(--radius-btn);
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: #33D6FF;
            box-shadow: var(--shadow-glow-hover);
            color: #06121F;
            transform: translateY(-1px);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-cyan-2);
            outline-offset: 3px;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 22px;
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.88rem;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-glow);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: rgba(0, 200, 255, 0.1);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan-2);
        }

        /* ==================== 相关产品链接区 ==================== */
        .related-products {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .related-product-card {
            background: var(--glass-dark);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            padding: 20px 22px;
            box-shadow: var(--shadow-dark);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all var(--transition-base);
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .related-product-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 6px 28px rgba(0, 0, 0, 0.4), 0 0 14px rgba(0, 200, 255, 0.1);
            transform: translateY(-2px);
        }

        .related-product-card .rp-icon {
            width: 40px;
            height: 40px;
            border-radius: 9px;
            background: rgba(0, 200, 255, 0.08);
            border: 1px solid rgba(0, 200, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .related-product-card h3 {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 4px;
        }

        .related-product-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.5;
        }

        .related-product-card a {
            margin-left: auto;
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .related-product-card a:hover {
            color: var(--accent-cyan-2);
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: rgba(6, 10, 18, 0.9);
            border-top: 1px solid rgba(0, 200, 255, 0.1);
            padding: 40px 24px 28px;
            margin-left: var(--sidebar-width);
        }

        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-top {
            display: flex;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            max-width: 300px;
            line-height: 1.6;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            align-items: flex-start;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid rgba(0, 200, 255, 0.06);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-muted);
            align-items: center;
        }

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

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

        /* ==================== 移动端遮罩 ==================== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(4, 8, 14, 0.6);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            z-index: 85;
        }

        .sidebar-overlay.visible {
            display: block;
        }

        /* ==================== 响应式 ==================== */
        @media (max-width: 75em) {
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .case-data-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .main-content {
                padding: 28px 28px 52px;
            }
        }

        @media (max-width: 64em) {
            .header-search {
                max-width: 260px;
                margin-left: 20px;
            }

            .sidebar {
                width: var(--sidebar-width);
            }

            .main-content {
                margin-left: var(--sidebar-width);
                padding: 24px 24px 48px;
            }

            .site-footer {
                margin-left: var(--sidebar-width);
            }

            .scenario-cta {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 28px;
            }

            .related-products {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 40em) {
            .site-header {
                padding: 0 16px;
            }

            .site-header .brand-logo {
                font-size: 1.05rem;
            }

            .header-search {
                display: none;
            }

            .header-controls .ver-group,
            .header-controls .lang-group {
                display: none;
            }

            .mobile-nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 8px 0 32px rgba(0, 0, 0, 0.5);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
                padding: 20px 16px 40px;
            }

            .site-footer {
                margin-left: 0;
                padding: 32px 16px 24px;
            }

            .page-hero {
                padding: 24px 20px;
            }

            .page-hero h1 {
                font-size: 1.5rem;
            }

            .page-hero .hero-lede {
                font-size: 0.92rem;
            }

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

            .feature-match-row {
                grid-template-columns: 1fr;
            }

            .feature-match-row .fm-cell,
            .feature-match-row .fm-cell:nth-child(2),
            .feature-match-row .fm-cell:nth-child(3) {
                border-left: none;
                border-bottom: 1px solid rgba(0, 200, 255, 0.06);
                padding: 12px 16px;
            }

            .feature-match-row .fm-cell:last-child {
                border-bottom: none;
            }

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

            .case-data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .case-data-card .data-number {
                font-size: 1.5rem;
            }

            .scenario-cta {
                padding: 22px 18px;
            }

            .scenario-cta .cta-copy h2 {
                font-size: 1.25rem;
            }

            .related-products {
                grid-template-columns: 1fr;
            }

            .footer-top {
                flex-direction: column;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #0D1322;
            --bg-card: #0F1A2E;
            --bg-panel: #111C31;
            --primary-blue-1: #0F2847;
            --primary-blue-2: #12335A;
            --primary-blue-3: #16406E;
            --accent-cyan: #00C8FF;
            --accent-cyan-2: #00E0FF;
            --accent-cyan-3: #00AED6;
            --accent-warm: #FFB84D;
            --text-primary: #F0F4FA;
            --text-secondary: #C6D3E3;
            --text-muted: #8A9BB8;
            --border-glow: rgba(0, 200, 255, 0.28);
            --border-soft: rgba(0, 200, 255, 0.12);
            --glass-bg: rgba(17, 28, 48, 0.72);
            --glass-dark: rgba(10, 16, 25, 0.55);
            --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 18px rgba(0, 200, 255, 0.35);
            --shadow-glow-hover: 0 0 26px rgba(0, 224, 255, 0.55);
            --radius-card: 12px;
            --radius-btn: 9px;
            --radius-input: 7px;
            --sidebar-width: 258px;
            --header-height: 64px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --font-display: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Inter', sans-serif;
            --section-pad: 64px;
            --card-gap: 24px;
        }

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

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-height) + 24px);
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.72;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-attachment: fixed;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        a:hover,
        a:focus {
            color: var(--accent-cyan-2);
            outline: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .row {
            max-width: 100%;
            margin: 0 auto;
        }

        .row .row {
            margin-left: 0;
            margin-right: 0;
        }

        input,
        select,
        textarea {
            background: rgba(15, 26, 46, 0.85) !important;
            border: 1px solid rgba(0, 200, 255, 0.2) !important;
            border-radius: var(--radius-input) !important;
            color: var(--text-primary) !important;
            box-shadow: none !important;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast) !important;
            padding: 10px 14px !important;
            font-size: 0.9rem !important;
            -webkit-appearance: none;
            appearance: none;
        }

        input:focus,
        select:focus,
        textarea:focus {
            border-color: var(--accent-cyan) !important;
            box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.3), 0 0 12px rgba(0, 200, 255, 0.15) !important;
            outline: none !important;
        }

        /* ============ 顶栏 Header ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(6, 10, 18, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 200, 255, 0.14);
            z-index: 100;
            display: flex;
            align-items: center;
            padding: 0 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.38);
        }

        .site-header .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-display);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .site-header .brand-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, rgba(0, 200, 255, 0.22), rgba(0, 174, 214, 0.08));
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 0.95rem;
        }

        .header-search {
            flex: 1;
            max-width: 360px;
            margin: 0 auto;
            position: relative;
            display: flex;
            align-items: center;
        }

        .header-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .header-search input {
            width: 100%;
            padding-left: 38px !important;
            background: rgba(15, 26, 46, 0.7) !important;
            border: 1px solid rgba(0, 200, 255, 0.16) !important;
            border-radius: 8px !important;
            color: var(--text-primary) !important;
            font-size: 0.85rem !important;
            height: 38px;
            transition: all var(--transition-base) !important;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }

        .header-search input:focus {
            border-color: var(--accent-cyan) !important;
            box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.25), 0 0 14px rgba(0, 200, 255, 0.12) !important;
        }

        .header-controls {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
            margin-left: 20px;
        }

        .ver-group,
        .lang-group {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .ver-group .control-label,
        .lang-group .control-label {
            font-size: 0.72rem;
            color: var(--text-muted);
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        .ver-group select,
        .lang-group select {
            padding: 6px 10px !important;
            font-size: 0.78rem !important;
            height: 32px;
            border-radius: 6px !important;
            cursor: pointer;
        }

        .mobile-nav-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: 8px;
            border: 1px solid var(--border-soft);
            background: rgba(15, 26, 46, 0.7);
            color: var(--text-primary);
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .mobile-nav-toggle:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* ============ 左侧侧栏 ============ */
        .doc-sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: var(--sidebar-width);
            bottom: 0;
            background: rgba(10, 16, 25, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-right: 1px solid rgba(0, 200, 255, 0.1);
            z-index: 90;
            padding: 22px 16px 32px;
            overflow-y: auto;
            overflow-x: hidden;
            transition: transform 0.3s ease;
        }

        .doc-sidebar .sidebar-section {
            margin-bottom: 24px;
        }

        .doc-sidebar .sidebar-title {
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
            padding-left: 10px;
        }

        .doc-sidebar .sidebar-nav-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .doc-sidebar .sidebar-nav-list li {
            margin-bottom: 2px;
        }

        .doc-sidebar .sidebar-nav-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 10px;
            border-radius: 7px;
            color: var(--text-secondary);
            font-size: 0.86rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border-left: 2px solid transparent;
        }

        .doc-sidebar .sidebar-nav-list a i {
            font-size: 0.75rem;
            color: var(--text-muted);
            width: 16px;
            text-align: center;
            transition: color var(--transition-fast);
        }

        .doc-sidebar .sidebar-nav-list a:hover {
            background: rgba(17, 40, 71, 0.6);
            color: var(--text-primary);
            border-left-color: rgba(0, 200, 255, 0.4);
        }

        .doc-sidebar .sidebar-nav-list a:hover i {
            color: var(--accent-cyan);
        }

        .doc-sidebar .sidebar-nav-list a.active {
            background: rgba(17, 40, 71, 0.75);
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
        }

        .doc-sidebar .sidebar-nav-list a.active i {
            color: var(--accent-cyan);
        }

        .doc-sidebar .sidebar-nav-list a .badge-indicator {
            margin-left: auto;
            font-size: 0.65rem;
            background: rgba(0, 200, 255, 0.15);
            color: var(--accent-cyan);
            padding: 2px 7px;
            border-radius: 10px;
            font-weight: 600;
        }

        /* ============ 主内容区 ============ */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            padding-top: var(--header-height);
            min-height: calc(100vh - var(--header-height));
        }

        .page-container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 36px 32px 64px;
        }

        /* ============ 面包屑 ============ */
        .breadcrumb-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .breadcrumb-bar a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb-bar a:hover {
            color: var(--accent-cyan);
        }

        .breadcrumb-bar .sep {
            color: rgba(138, 155, 184, 0.5);
        }

        .breadcrumb-bar .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        /* ============ 页面标题区 ============ */
        .page-heading {
            margin-bottom: 28px;
        }

        .page-heading h1 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .page-heading .heading-sub {
            font-size: 0.98rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.75;
            margin: 0;
        }

        .page-heading .heading-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .page-heading .heading-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .page-heading .heading-meta i {
            color: var(--accent-cyan);
            font-size: 0.72rem;
        }

        /* ============ 筛选栏 ============ */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 30px;
            padding: 14px 16px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
        }

        .filter-bar .filter-label {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-right: 4px;
        }

        .filter-btn {
            padding: 7px 16px;
            border-radius: 7px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(15, 26, 46, 0.65);
            border: 1px solid rgba(0, 200, 255, 0.14);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .filter-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(17, 40, 71, 0.7);
        }

        .filter-btn.active {
            background: rgba(0, 200, 255, 0.14);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.18);
        }

        /* ============ 下载卡片列表 ============ */
        .download-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--card-gap);
            margin-bottom: 44px;
        }

        .download-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            padding: 22px 24px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

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

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

        .download-card .card-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 12px;
        }

        .download-card .ver-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 5px;
            letter-spacing: 0.02em;
        }

        .ver-tag.latest {
            background: rgba(0, 200, 255, 0.14);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 200, 255, 0.3);
        }

        .ver-tag.stable {
            background: rgba(0, 174, 214, 0.12);
            color: var(--accent-cyan-3);
            border: 1px solid rgba(0, 174, 214, 0.25);
        }

        .ver-tag.legacy {
            background: rgba(138, 155, 184, 0.1);
            color: var(--text-muted);
            border: 1px solid rgba(138, 155, 184, 0.2);
        }

        .download-card .ver-name {
            font-family: var(--font-display);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 4px;
        }

        .download-card .ver-date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .download-card .card-thumb {
            width: 56px;
            height: 56px;
            border-radius: 10px;
            overflow: hidden;
            border: 1px solid var(--border-soft);
            flex-shrink: 0;
            background: rgba(15, 26, 46, 0.7);
        }

        .download-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .download-card .ver-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0 0 14px;
            line-height: 1.7;
        }

        .download-card .file-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            margin-bottom: 16px;
            font-size: 0.76rem;
            color: var(--text-muted);
        }

        .download-card .file-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .download-card .file-meta i {
            color: var(--accent-cyan);
            font-size: 0.68rem;
        }

        .download-card .card-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            font-size: 0.82rem;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #06121F;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-download:hover {
            box-shadow: var(--shadow-glow-hover);
            background: #33D6FF;
            color: #06121F;
            transform: translateY(-1px);
        }

        .btn-download i {
            font-size: 0.8rem;
        }

        .btn-outline-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            font-size: 0.78rem;
            font-weight: 500;
            background: transparent;
            border: 1px solid rgba(0, 200, 255, 0.22);
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-outline-sm:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.06);
        }

        /* ============ 更新日志时间线 ============ */
        .changelog-section {
            margin-bottom: 44px;
        }

        .section-heading {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .section-heading .heading-ico {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(0, 200, 255, 0.1);
            border: 1px solid var(--border-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .section-heading h2 {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
            letter-spacing: -0.01em;
        }

        .changelog-timeline {
            position: relative;
            padding-left: 26px;
            border-left: 2px solid rgba(0, 200, 255, 0.14);
            margin-left: 8px;
        }

        .changelog-item {
            position: relative;
            margin-bottom: 24px;
            padding-left: 20px;
        }

        .changelog-item::before {
            content: '';
            position: absolute;
            left: -34px;
            top: 6px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 8px rgba(0, 200, 255, 0.5);
            border: 2px solid rgba(10, 16, 25, 0.9);
        }

        .changelog-item .log-ver {
            display: inline-block;
            font-family: var(--font-display);
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 4px;
        }

        .changelog-item .log-date {
            font-size: 0.72rem;
            color: var(--text-muted);
            margin-left: 10px;
        }

        .changelog-item ul {
            list-style: none;
            margin: 6px 0 0;
            padding: 0;
        }

        .changelog-item ul li {
            font-size: 0.84rem;
            color: var(--text-secondary);
            padding: 3px 0;
            padding-left: 16px;
            position: relative;
            line-height: 1.65;
        }

        .changelog-item ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 12px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: rgba(0, 200, 255, 0.5);
        }

        /* ============ 双栏区：安装说明 + 校验信息 ============ */
        .info-panels {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--card-gap);
            margin-bottom: 44px;
        }

        .info-panel {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            padding: 24px 26px;
            transition: all var(--transition-base);
        }

        .info-panel:hover {
            border-color: var(--border-glow);
        }

        .info-panel .panel-title {
            display: flex;
            align-items: center;
            gap: 9px;
            font-family: var(--font-display);
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px;
        }

        .info-panel .panel-title i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
        }

        .info-panel .steps-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .info-panel .steps-list li {
            display: flex;
            gap: 10px;
            font-size: 0.84rem;
            color: var(--text-secondary);
            padding: 5px 0;
            line-height: 1.65;
        }

        .info-panel .steps-list li .step-num {
            width: 22px;
            height: 22px;
            border-radius: 6px;
            background: rgba(0, 200, 255, 0.12);
            color: var(--accent-cyan);
            font-size: 0.7rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .checksum-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.78rem;
        }

        .checksum-table th {
            text-align: left;
            color: var(--text-muted);
            font-weight: 600;
            font-size: 0.72rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            padding: 6px 0;
            border-bottom: 1px solid rgba(0, 200, 255, 0.1);
        }

        .checksum-table td {
            padding: 7px 0;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(0, 200, 255, 0.05);
            font-family: 'SFMono-Regular', 'Consolas', 'Courier New', monospace;
            font-size: 0.74rem;
        }

        .checksum-table td:last-child {
            word-break: break-all;
        }

        /* ============ 数据指标 ============ */
        .stats-section {
            margin-bottom: 44px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .stat-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-card);
            padding: 20px 22px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .stat-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-dark);
        }

        .stat-card .stat-number {
            font-family: var(--font-display);
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 4px;
            line-height: 1.2;
        }

        .stat-card .stat-label {
            font-size: 0.76rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .stat-card .stat-delta {
            display: inline-block;
            margin-top: 6px;
            font-size: 0.7rem;
            font-weight: 600;
            color: #34D399;
            background: rgba(52, 211, 153, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
        }

        /* ============ 相关文档链接区 ============ */
        .related-docs {
            margin-bottom: 20px;
        }

        .doc-link-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 14px;
        }

        .doc-link-card {
            background: rgba(15, 26, 46, 0.6);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            padding: 16px 18px;
            transition: all var(--transition-base);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .doc-link-card:hover {
            border-color: var(--border-glow);
            background: rgba(17, 40, 71, 0.65);
            transform: translateY(-2px);
        }

        .doc-link-card .doc-ico {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: rgba(0, 200, 255, 0.1);
            border: 1px solid var(--border-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        .doc-link-card .doc-info {
            flex: 1;
            min-width: 0;
        }

        .doc-link-card .doc-name {
            font-size: 0.84rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .doc-link-card .doc-cat {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        /* ============ 安全提示区 ============ */
        .security-note {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 20px;
            background: rgba(255, 184, 77, 0.06);
            border: 1px solid rgba(255, 184, 77, 0.18);
            border-radius: var(--radius-card);
            margin-bottom: 20px;
        }

        .security-note .sec-ico {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: rgba(255, 184, 77, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-warm);
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .security-note p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: rgba(6, 10, 18, 0.95);
            border-top: 1px solid rgba(0, 200, 255, 0.1);
            padding: 36px 32px 24px;
            margin-top: 0;
        }

        .footer-inner {
            max-width: 1120px;
            margin: 0 auto;
        }

        .footer-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-display);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .footer-brand p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin: 0;
            max-width: 280px;
            line-height: 1.65;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 18px;
        }

        .footer-links a {
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 18px;
            font-size: 0.74rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(0, 200, 255, 0.07);
            padding-top: 18px;
        }

        .footer-bottom a {
            color: var(--text-muted);
            font-size: 0.74rem;
            transition: color var(--transition-fast);
        }

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

        /* ============ 移动端侧栏覆盖层 ============ */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 85;
            backdrop-filter: blur(3px);
            -webkit-backdrop-filter: blur(3px);
        }

        .sidebar-overlay.show {
            display: block;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 75em) {
            .doc-link-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 64em) {
            :root {
                --sidebar-width: 0px;
                --section-pad: 48px;
            }

            .doc-sidebar {
                transform: translateX(-100%);
                width: 268px;
            }

            .doc-sidebar.open {
                transform: translateX(0);
                box-shadow: 8px 0 32px rgba(0, 0, 0, 0.5);
            }

            .mobile-nav-toggle {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
            }

            .header-search {
                max-width: 260px;
                margin-left: auto;
                margin-right: 10px;
            }
        }

        @media (max-width: 40em) {
            :root {
                --section-pad: 40px;
            }

            .site-header {
                padding: 0 14px;
                height: 58px;
            }

            :root {
                --header-height: 58px;
            }

            .site-header .brand-logo {
                font-size: 1rem;
            }

            .site-header .brand-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
            }

            .header-search {
                display: none;
            }

            .header-controls .ver-group,
            .header-controls .lang-group {
                display: none;
            }

            .header-controls {
                margin-left: auto;
            }

            .page-container {
                padding: 20px 14px 40px;
            }

            .page-heading h1 {
                font-size: 1.45rem;
            }

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

            .info-panels {
                grid-template-columns: 1fr;
            }

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

            .stat-card {
                padding: 14px 12px;
            }

            .stat-card .stat-number {
                font-size: 1.3rem;
            }

            .doc-link-grid {
                grid-template-columns: 1fr;
            }

            .filter-bar {
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                gap: 6px;
                padding: 10px 10px;
            }

            .filter-btn {
                flex-shrink: 0;
                padding: 6px 12px;
                font-size: 0.72rem;
            }

            .download-card {
                padding: 16px 18px;
            }

            .download-card .card-thumb {
                width: 44px;
                height: 44px;
            }

            .download-card .ver-name {
                font-size: 1rem;
            }

            .changelog-timeline {
                padding-left: 16px;
                margin-left: 4px;
            }

            .changelog-item {
                padding-left: 12px;
            }

            .changelog-item::before {
                left: -24px;
                width: 8px;
                height: 8px;
            }

            .footer-top {
                flex-direction: column;
                gap: 18px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .footer-bottom span {
                display: block;
            }

            .security-note {
                flex-direction: column;
                gap: 10px;
                padding: 14px 16px;
            }
        }