:root {
            --primary: #3b82f6;
            --primary-light: #60a5fa;
            --primary-dark: #1d4ed8;
            --accent: #06b6d4;
            --accent-glow: #22d3ee;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --success: #10b981;
            --radius-sm: 10px;
            --radius: 16px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.12), 0 8px 24px rgba(59, 130, 246, 0.08);
            --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            --content-width: 1200px;
            --nav-height: 60px;
            --bg-card: #ffffff;
            --gradient-start: #3b82f6;
            --gradient-end: #06b6d4;
            --text-primary: #0f172a;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            min-height: 100vh;
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 16px;
            background: var(--primary);
            color: #fff;
            padding: 10px 20px;
            border-radius: 8px;
            z-index: 1000;
            font-weight: 600;
            text-decoration: none;
            transition: top 0.3s;
        }
        .skip-link:focus {
            top: 16px;
        }

        /* 导航栏 */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(18px) saturate(160%);
            -webkit-backdrop-filter: blur(18px) saturate(160%);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .nav-container {
            width: 100%;
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .nav-logo {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--text);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: -0.3px;
        }
        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 6px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 8px 14px;
            border-radius: 8px;
            text-decoration: none;
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
            letter-spacing: -0.2px;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            background: rgba(59, 130, 246, 0.07);
        }
        .nav-links a svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-direction: column;
            gap: 5px;
            z-index: 101;
        }
        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 56px 24px 52px;
            text-align: center;
            overflow: hidden;
            background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
            border-bottom: 1px solid var(--border-light);
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -200px;
            left: 50%;
            transform: translateX(-50%);
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 68%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }
        .hero-inner {
            position: relative;
            z-index: 1;
            max-width: 780px;
            margin: 0 auto;
        }
        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(59, 130, 246, 0.07);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 7px 18px;
            border-radius: 50px;
            margin-bottom: 22px;
            letter-spacing: -0.2px;
            border: 1px solid rgba(59, 130, 246, 0.14);
        }
        .hero-eyebrow .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent-glow);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.5);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(34, 211, 238, 0);
            }
        }
        .hero h1 {
            font-size: clamp(2rem, 4.5vw, 3rem);
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 16px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            cursor: pointer;
            transition: var(--transition);
            letter-spacing: -0.3px;
            border: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(59, 130, 246, 0.28);
        }
        .btn-outline {
            background: var(--surface);
            color: var(--text);
            border: 1.5px solid var(--border);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            background: rgba(59, 130, 246, 0.03);
        }
        .btn svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }

        /* 通用区块 */
        .section {
            padding: 52px 24px;
            max-width: var(--content-width);
            margin: 0 auto;
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            letter-spacing: -0.6px;
            margin-bottom: 10px;
            color: var(--text);
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 540px;
            margin: 0 auto;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--primary);
            margin-bottom: 10px;
        }

        /* 目录卡片 */
        .toc-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 10px;
            margin-bottom: 36px;
        }
        .toc-card {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 14px 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            transition: all var(--transition);
            color: var(--text);
        }
        .toc-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
            transform: translateY(-1px);
        }
        .toc-num {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            color: #fff;
            flex-shrink: 0;
        }
        .toc-text {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text);
        }

        /* 步骤卡片 */
        .step-card {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: grid;
            grid-template-columns: 60px 1fr;
            gap: 24px;
            margin-bottom: 24px;
            transition: var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .step-number {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            flex-shrink: 0;
            align-self: start;
        }
        .step-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .step-body p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 14px;
        }
        .step-body p strong {
            color: var(--text);
        }
        .step-guide {
            background: var(--surface-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .step-guide code {
            background: var(--border-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.85rem;
            color: var(--primary-dark);
        }
        .step-guide ul,
        .step-guide ol {
            padding-left: 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .tip-box {
            background: rgba(59, 130, 246, 0.04);
            border-left: 4px solid var(--primary);
            padding: 12px 16px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin-top: 12px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            display: flex;
            gap: 8px;
        }
        .tip-box strong {
            color: var(--primary);
            flex-shrink: 0;
        }

        /* 创意场景工坊 */
        .workshop-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 16px;
        }
        .workshop-card {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: var(--transition);
        }
        .workshop-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .workshop-card h4 {
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .workshop-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .config-snippet {
            background: #1e293b;
            color: #e2e8f0;
            font-family: var(--font-mono);
            font-size: 0.8rem;
            padding: 12px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            white-space: pre-wrap;
        }

        /* Footer */
        .site-footer {
            text-align: center;
            padding: 36px 24px;
            border-top: 1px solid var(--border-light);
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.8;
        }
        .site-footer a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        .footer-platforms {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 10px;
            font-weight: 500;
            color: var(--text-secondary);
        }

        /* 弹窗 */
        .popup-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
            backdrop-filter: blur(4px);
        }
        .popup-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }
        .popup {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            max-width: 400px;
            width: 90%;
        }
        .popup-ic {
            font-size: 2.8rem;
            margin-bottom: 12px;
        }
        .popup h3 {
            font-weight: 700;
            margin-bottom: 6px;
        }
        .popup p {
            color: var(--text-muted);
            margin-bottom: 18px;
        }
        .popup-btns {
            display: flex;
            gap: 10px;
            justify-content: center;
        }
        .btn-popup {
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            border: none;
            font-family: var(--font-sans);
            letter-spacing: -0.2px;
        }
        .btn-cancel {
            background: var(--surface-alt);
            color: var(--text-secondary);
        }
        .btn-confirm {
            background: var(--primary);
            color: #fff;
        }

        @media (max-width: 900px) {
            .step-card {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 36px 16px;
            }
        }
        @media (max-width: 600px) {
            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--surface);
                flex-direction: column;
                padding: 12px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                gap: 2px;
                z-index: 10;
            }
            .nav-links.show {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
                max-width: 300px;
            }
        }