:root {
            --bg-primary: #0b0914;
            --bg-secondary: #12101f;
            --bg-card: #16132b;
            --bg-elevated: #1d1838;
            --text-primary: #f0edf7;
            --text-secondary: #a8a0c0;
            --text-muted: #6e6590;
            --brand: #00e5b0;
            --brand-glow: rgba(0, 229, 176, 0.35);
            --brand-dim: rgba(0, 229, 176, 0.12);
            --accent: #8b5cf6;
            --accent-glow: rgba(139, 92, 246, 0.3);
            --accent-dim: rgba(139, 92, 246, 0.1);
            --gradient-main: linear-gradient(135deg, #00e5b0 0%, #7c6cf0 50%, #8b5cf6 100%);
            --gradient-hero: linear-gradient(160deg, #0b0914 0%, #12102a 40%, #0f0c20 100%);
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glow: rgba(0, 229, 176, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --font-sans: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(0, 229, 176, 0.15);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--brand); text-decoration: none; transition: color 0.25s ease; }
        a:hover { color: #5ff5cf; }
        .skip-link { position: absolute; left: -999px; top: 0; background: var(--brand); color: #0b0914; padding: 10px 20px; border-radius: 0 0 var(--radius-sm) 0; font-weight: 700; z-index: 9999; }
        .skip-link:focus { left: 0; }
        .container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

        /* Header */
        .header {
            position: sticky; top: 0; z-index: 1000;
            background: rgba(11, 9, 20, 0.88);
            backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
        }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 800; color: var(--text-primary); letter-spacing: -0.5px; white-space: nowrap; }
        .logo .logo-mark { width: 34px; height: 34px; border-radius: 10px; background: var(--gradient-main); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; font-weight: 900; color: #0b0914; box-shadow: 0 0 20px var(--brand-glow); }
        .nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
        .nav a { padding: 8px 14px; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 500; color: var(--text-secondary); transition: all 0.25s ease; white-space: nowrap; }
        .nav a:hover { color: var(--text-primary); background: var(--bg-elevated); }
        .nav a.is-active { color: var(--brand); background: var(--brand-dim); font-weight: 600; }
        .header-cta { display: flex; align-items: center; gap: 10px; }
        .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 20px; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 600; border: none; cursor: pointer; transition: all 0.3s ease; white-space: nowrap; text-align: center; }
        .btn-primary { background: var(--brand); color: #0b0914; box-shadow: 0 0 24px var(--brand-glow); }
        .btn-primary:hover { background: #5ff5cf; color: #0b0914; box-shadow: 0 0 36px var(--brand-glow); transform: translateY(-1px); }
        .btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-subtle); }
        .btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
        .btn-outline { background: transparent; color: var(--brand); border: 1.5px solid var(--brand); }
        .btn-outline:hover { background: var(--brand-dim); border-color: var(--brand); }
        .btn-lg { padding: 14px 30px; font-size: 1rem; border-radius: var(--radius-md); }
        .menu-btn { display: none; background: var(--bg-elevated); border: 1px solid var(--border-subtle); color: var(--text-primary); font-size: 1.2rem; width: 42px; height: 42px; border-radius: var(--radius-sm); cursor: pointer; align-items: center; justify-content: center; transition: all 0.25s ease; }
        .menu-btn:hover { border-color: var(--brand); color: var(--brand); }

        /* Hero Sitemap */
        .hero-sitemap {
            background: var(--gradient-hero);
            padding: 70px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .hero-sitemap::before { content: ''; position: absolute; top: -140px; right: -90px; width: 600px; height: 600px; background: radial-gradient(circle, var(--brand-glow) 0%, transparent 70%); pointer-events: none; }
        .hero-sitemap::after { content: ''; position: absolute; bottom: -110px; left: -110px; width: 500px; height: 500px; background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%); pointer-events: none; }
        .sitemap-hero-grid { display: grid; grid-template-columns: 1fr; text-align: center; position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
        .eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 50px; background: var(--brand-dim); color: var(--brand); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 18px; border: 1px solid var(--border-glow); justify-content: center; }
        .eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); animation: pulse-dot 2s infinite; }
        @keyframes pulse-dot { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.5); } }
        .sitemap-hero-grid h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; line-height: 1.2; letter-spacing: -1px; margin-bottom: 18px; }
        .sitemap-hero-grid h1 .highlight { background: var(--gradient-main); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
        .lead { font-size: 1.05rem; color: var(--text-secondary); max-width: 650px; margin: 0 auto 24px; }
        .hero-meta { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; font-size: 0.85rem; color: var(--text-muted); }
        .hero-meta span { display: flex; align-items: center; gap: 6px; }
        .hero-meta b { color: var(--brand); font-weight: 700; }

        /* Sections */
        .section { padding: 70px 0; }
        .section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
        .kicker { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--brand); background: var(--brand-dim); padding: 4px 14px; border-radius: 50px; margin-bottom: 14px; border: 1px solid var(--border-glow); }
        .section-head h2 { font-size: clamp(1.5rem, 2.8vw, 2.2rem); font-weight: 800; letter-spacing: -0.5px; margin-bottom: 12px; }
        .section-head p { color: var(--text-secondary); font-size: 0.95rem; }

        /* 分类卡片网格 */
        .category-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
        .category-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 24px 20px; transition: all 0.35s ease; }
        .category-card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-glow); transform: translateY(-3px); }
        .category-icon { font-size: 2rem; margin-bottom: 12px; }
        .category-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 12px; color: var(--text-primary); }
        .category-card ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
        .category-card li a { font-size: 0.85rem; color: var(--text-secondary); transition: color 0.25s ease; display: inline-flex; align-items: center; gap: 6px; }
        .category-card li a:hover { color: var(--brand); }
        .category-card li a::before { content: '›'; color: var(--brand); font-weight: 700; }

        /* 可视化架构图 */
        .architecture-visual {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 30px;
            margin-top: 30px;
            position: relative;
            overflow: hidden;
        }
        .architecture-visual::before { content: ''; position: absolute; inset: -1px; border-radius: var(--radius-lg); background: linear-gradient(135deg, var(--brand-glow), transparent 40%, var(--accent-glow)); z-index: -1; opacity: 0.3; }
        .arch-level { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
        .arch-node {
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 10px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .arch-node:hover { border-color: var(--brand); color: var(--brand); box-shadow: var(--shadow-glow); }
        .arch-node.root { background: var(--gradient-main); color: #0b0914; border: none; font-weight: 800; }
        .arch-connector { display: flex; justify-content: center; color: var(--brand); font-size: 1.2rem; margin: 6px 0; }

        /* 热门快捷入口 */
        .quick-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
        .quick-link {
            padding: 10px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }
        .quick-link:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-dim); transform: translateY(-2px); }

        /* 页面清单表格 */
        .page-table { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--border-subtle); background: var(--bg-card); }
        .page-table table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
        .page-table th, .page-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--border-subtle); }
        .page-table th { background: var(--bg-elevated); font-weight: 700; color: var(--text-primary); white-space: nowrap; }
        .page-table th:first-child { color: var(--brand); }
        .page-table td { color: var(--text-secondary); }
        .page-table tr:last-child td { border-bottom: none; }
        .page-table tr:hover td { background: rgba(255,255,255,0.02); }

        /* 收录指引 */
        .guide-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
        .guide-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 24px; transition: all 0.3s ease; }
        .guide-card:hover { border-color: var(--brand); box-shadow: var(--shadow-glow); transform: translateY(-3px); }
        .guide-icon { font-size: 2rem; margin-bottom: 12px; }
        .guide-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
        .guide-card p { font-size: 0.85rem; color: var(--text-secondary); }

        /* CTA */
        .cta-band { background: var(--gradient-hero); padding: 70px 0; border-top: 1px solid var(--border-subtle); position: relative; overflow: hidden; }
        .cta-band::before { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 600px; height: 600px; background: radial-gradient(circle, var(--brand-glow) 0%, transparent 70%); pointer-events: none; }
        .cta-band h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; margin-bottom: 12px; }
        .cta-band p { color: var(--text-secondary); margin-bottom: 28px; }

        /* Footer */
        .footer { background: var(--bg-secondary); border-top: 1px solid var(--border-subtle); padding: 50px 0 24px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 36px; }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.85rem; color: var(--text-muted); max-width: 300px; }
        .footer h3 { font-size: 0.85rem; font-weight: 700; margin-bottom: 14px; color: var(--text-primary); letter-spacing: 0.5px; }
        .footer a { display: block; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 8px; transition: color 0.25s ease; }
        .footer a:hover { color: var(--brand); }
        .copy { border-top: 1px solid var(--border-subtle); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 0.78rem; color: var(--text-muted); }

        @media (max-width: 1024px) {
            .category-grid { grid-template-columns: repeat(2,1fr); }
            .guide-grid { grid-template-columns: repeat(2,1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .header-inner { height: auto; padding: 12px 0; flex-wrap: wrap; }
            .nav { display: none; width: 100%; flex-direction: column; background: var(--bg-secondary); border-radius: var(--radius-sm); padding: 12px; border: 1px solid var(--border-subtle); }
            .nav.open { display: flex; }
            .nav a { padding: 10px 14px; width: 100%; text-align: center; }
            .menu-btn { display: flex; }
            .header-cta .btn-ghost { display: none; }
            .category-grid, .guide-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .hero-sitemap { padding: 40px 0; }
            .section { padding: 48px 0; }
            .page-table th, .page-table td { padding: 12px 14px; font-size: 0.78rem; }
            .hero-meta { gap: 14px; font-size: 0.78rem; }
            .architecture-visual { padding: 20px; }
        }