:root {
            --bg-deepest: #060b10;
            --bg-deep: #0a1018;
            --bg-surface: #0f1822;
            --bg-card: #141e2b;
            --bg-card-hover: #192638;
            --bg-elevated: #1b2a3a;
            --cyan-400: #22d3ee;
            --cyan-500: #06b6d4;
            --cyan-600: #0891b2;
            --cyan-700: #0e7490;
            --cyan-glow: rgba(6, 182, 212, 0.35);
            --purple-400: #a78bfa;
            --purple-500: #8b5cf6;
            --purple-600: #7c3aed;
            --purple-glow: rgba(139, 92, 246, 0.3);
            --text-primary: #e8edf3;
            --text-secondary: #bcc8d4;
            --text-muted: #7d8f9f;
            --text-dim: #5a6b7a;
            --border-subtle: rgba(56, 189, 248, 0.08);
            --border-card: rgba(56, 189, 248, 0.12);
            --border-glow: rgba(6, 182, 212, 0.25);
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --radius-full: 9999px;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-card-hover: 0 12px 36px rgba(6, 182, 212, 0.12), 0 2px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow-cyan: 0 0 40px rgba(6, 182, 212, 0.2);
            --shadow-glow-purple: 0 0 40px rgba(139, 92, 246, 0.18);
            --ease-out: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --ease-spring: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background: var(--bg-deepest);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            background-image: radial-gradient(ellipse at 20% 10%, rgba(6, 182, 212, 0.04) 0%, transparent 60%), radial-gradient(ellipse at 75% 50%, rgba(139, 92, 246, 0.03) 0%, transparent 55%), radial-gradient(ellipse at 40% 90%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
            background-attachment: fixed;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 22px;
        }

        /* 头部导航（与首页一致） */
        header {
            background: rgba(10, 16, 24, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-subtle);
            box-shadow: 0 1px 0 rgba(6, 182, 212, 0.04);
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 12px 0;
            gap: 12px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--cyan-500), var(--purple-500));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 18px var(--cyan-glow);
            transition: var(--ease-spring);
        }
        .logo-area:hover .logo-icon {
            box-shadow: 0 0 28px var(--purple-glow);
            transform: scale(1.04);
        }
        .logo-text {
            font-weight: 720;
            font-size: 1.35rem;
            letter-spacing: -0.3px;
            background: linear-gradient(135deg, #e8edf3 0%, #38bdf8 50%, #a78bfa 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .nav-links {
            display: flex;
            gap: 4px;
            align-items: center;
            flex-wrap: wrap;
            list-style: none;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--ease-out);
            font-size: 0.88rem;
            padding: 7px 13px;
            border-radius: 22px;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--cyan-400);
            background: rgba(6, 182, 212, 0.08);
        }
        .nav-links a.active {
            font-weight: 620;
            background: rgba(6, 182, 212, 0.13);
            box-shadow: inset 0 0 0 1px rgba(6, 182, 212, 0.2);
        }
        .nav-download-btn {
            background: linear-gradient(135deg, var(--cyan-600), var(--cyan-500));
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 28px;
            font-weight: 600;
            transition: var(--ease-spring);
            box-shadow: 0 0 16px var(--cyan-glow);
        }
        .nav-download-btn:hover {
            background: linear-gradient(135deg, var(--cyan-500), #22d3ee);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.5);
            transform: translateY(-2px);
        }

        /* 通用标题 */
        .section-title {
            font-size: clamp(1.6rem, 2.5vw, 2rem);
            font-weight: 720;
            margin-bottom: 10px;
            color: #e0e8f2;
            letter-spacing: -0.2px;
        }
        .section-subtitle {
            color: var(--text-muted);
            max-width: 650px;
            margin: 0 auto 36px;
            font-size: 0.9rem;
            line-height: 1.55;
            text-align: center;
        }
        .accent-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--cyan-500);
            box-shadow: 0 0 10px var(--cyan-glow);
            margin: 0 6px;
            vertical-align: middle;
        }
        .accent-dot.purple {
            background: var(--purple-500);
            box-shadow: 0 0 10px var(--purple-glow);
        }

        /* Hero */
        .hero-page {
            padding: 40px 0 30px;
            text-align: center;
        }
        .hero-page h1 {
            font-size: clamp(2.2rem, 4vw, 3rem);
            font-weight: 820;
            background: linear-gradient(150deg, #e0e8f2 0%, #38bdf8 40%, #a78bfa 75%, #c4b5fd 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }
        .hero-page p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto 20px;
            line-height: 1.6;
        }
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--cyan-600), var(--cyan-500));
            color: #fff;
            padding: 12px 28px;
            border-radius: 36px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--ease-spring);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            box-shadow: 0 0 22px var(--cyan-glow);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--cyan-500), #22d3ee);
            transform: translateY(-3px);
            box-shadow: 0 0 36px rgba(6, 182, 212, 0.5);
        }
        .btn-outline {
            background: transparent;
            border: 1.6px solid rgba(6, 182, 212, 0.5);
            color: var(--cyan-400);
            padding: 11px 26px;
            border-radius: 36px;
            text-decoration: none;
            font-weight: 580;
            transition: var(--ease-spring);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.94rem;
        }
        .btn-outline:hover {
            background: rgba(6, 182, 212, 0.07);
            border-color: var(--cyan-400);
            color: #38bdf8;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
            transform: translateY(-2px);
        }

        /* 内容卡片基础 */
        .card-base {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
        }
        .card-base:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            background: var(--bg-card-hover);
            transform: translateY(-3px);
        }

        /* 架构解析两栏 */
        .arch-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 22px;
            margin-top: 20px;
        }

        /* 功能系统列表 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 18px;
            margin-top: 24px;
        }
        .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
        }
        .feature-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .feature-item h4 {
            font-size: 1.1rem;
            font-weight: 680;
            color: #e0e8f2;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feature-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        /* 场景卡片 */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin-top: 20px;
        }
        .scene-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            border: 1px solid var(--border-card);
            transition: var(--ease-out);
            text-align: center;
        }
        .scene-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .scene-card .scene-icon {
            font-size: 2rem;
            margin-bottom: 8px;
        }
        .scene-card h4 {
            font-weight: 680;
            color: #e0e8f2;
            margin-bottom: 4px;
        }
        .scene-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* 对比表格 */
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 18px;
            font-size: 0.85rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-card);
        }
        .compare-table th,
        .compare-table td {
            padding: 12px 14px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
        }
        .compare-table th {
            background: rgba(6, 182, 212, 0.08);
            color: var(--cyan-400);
            font-weight: 600;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .compare-table td {
            color: var(--text-secondary);
        }
        .compare-table tr:hover td {
            background: rgba(6, 182, 212, 0.03);
        }

        /* 底部推荐阅读 */
        .related-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 22px;
        }
        .related-link-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: 28px;
            padding: 10px 20px;
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.88rem;
            transition: var(--ease-out);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-link-card:hover {
            border-color: var(--cyan-500);
            color: var(--cyan-400);
            background: rgba(6, 182, 212, 0.06);
            box-shadow: 0 0 16px rgba(6, 182, 212, 0.15);
        }

        /* 底部CTA */
        .bottom-cta-section {
            padding: 28px 0 44px;
        }
        .bottom-cta {
            background: linear-gradient(155deg, #0c1a26 0%, #111f2e 35%, #0f1a28 70%, #131e30 100%);
            border-radius: var(--radius-xl);
            padding: 42px 26px;
            text-align: center;
            color: #fff;
            box-shadow: 0 0 50px rgba(6, 182, 212, 0.1);
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(6, 182, 212, 0.15);
        }
        .bottom-cta::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -25%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .bottom-cta h2 {
            font-size: clamp(1.5rem, 2.5vw, 1.8rem);
            font-weight: 720;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }
        .bottom-cta p {
            font-size: 0.95rem;
            opacity: 0.85;
            max-width: 540px;
            margin: 0 auto 22px;
            position: relative;
            z-index: 1;
            color: #cbd5e1;
        }
        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--cyan-500), #22d3ee);
            color: #060b10;
            padding: 14px 34px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.02rem;
            text-decoration: none;
            transition: var(--ease-spring);
            position: relative;
            z-index: 1;
            box-shadow: 0 0 30px var(--cyan-glow);
        }
        .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 48px rgba(6, 182, 212, 0.55);
            background: linear-gradient(135deg, #22d3ee, #67e8f9);
        }

        /* 页脚 */
        .footer {
            background: #060d14;
            color: #7d8f9f;
            padding: 40px 0 18px;
            border-top: 1px solid var(--border-subtle);
            border-top-left-radius: 24px;
            border-top-right-radius: 24px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 24px;
        }
        .footer-content h4 {
            color: #cbd5e1;
            margin-bottom: 8px;
            font-size: 0.95rem;
            font-weight: 620;
        }
        .footer-content p {
            font-size: 0.8rem;
            line-height: 1.55;
        }
        .footer-content a {
            color: #7d8f9f;
            text-decoration: none;
            transition: var(--ease-out);
        }
        .footer-content a:hover {
            color: var(--cyan-400);
            text-decoration: underline;
        }
        .footer-copyright {
            text-align: center;
            padding-top: 24px;
            font-size: 0.75rem;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            margin-top: 16px;
            opacity: 0.7;
            color: #5a6b7a;
        }

        @media (max-width: 768px) {
            .nav-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .arch-grid,
            .feature-grid,
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .compare-table {
                font-size: 0.7rem;
            }
        }