:root {
            --primary: #4f46e5;
            --primary-light: #6366f1;
            --primary-dark: #4338ca;
            --accent: #3b82f6;
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            --bg-base: #f8fafc;
            --bg-card: rgba(255, 255, 255, 0.7);
            --bg-glass: rgba(255, 255, 255, 0.25);
            --border: rgba(148, 163, 184, 0.2);
            --border-light: rgba(148, 163, 184, 0.3);
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --code-bg: rgba(15, 23, 42, 0.04);
            --gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
            --glow: 0 8px 32px rgba(79, 70, 229, 0.12);
            --glass-blur: blur(20px);
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
            --radius: 16px;
            --radius-sm: 10px;
        }

        [data-theme="dark"] {
            --bg-base: #0f172a;
            --bg-card: rgba(30, 41, 59, 0.7);
            --bg-glass: rgba(30, 41, 59, 0.4);
            --border: rgba(148, 163, 184, 0.15);
            --border-light: rgba(148, 163, 184, 0.25);
            --text: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --code-bg: rgba(15, 23, 42, 0.5);
            --glow: 0 8px 32px rgba(79, 70, 229, 0.25);
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
        }

        body {
            font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-base);
            color: var(--text);
            line-height: 1.7;
            min-height: 100vh;
            transition: background 0.3s ease, color 0.3s ease;
        }

        [data-theme="dark"] body {
            background-image: 
                radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
                radial-gradient(ellipse 60% 40% at 100% 0%, rgba(37, 99, 235, 0.1), transparent);
        }

        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 60px 24px;
        }

        .header {
            text-align: center;
            padding: 40px 0 60px;
            position: relative;
        }

        .header::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.2) 0%, transparent 70%);
            filter: blur(80px);
            z-index: -1;
            animation: pulse 8s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
            50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
        }

        .header-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: var(--bg-glass);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border);
            border-radius: 100px;
            font-size: 0.85rem;
            color: var(--primary);
            margin-bottom: 24px;
            animation: fadeInUp 0.6s ease-out;
            box-shadow: var(--shadow-sm);
        }

        .header h1 {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 700;
            margin-bottom: 16px;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: fadeInUp 0.6s ease-out 0.1s both;
        }

        .header p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto;
            animation: fadeInUp 0.6s ease-out 0.2s both;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .nav {
            display: flex;
            justify-content: center;
            gap: 6px;
            margin-bottom: 48px;
            flex-wrap: wrap;
            animation: fadeInUp 0.6s ease-out 0.3s both;
        }

        .nav a {
            padding: 10px 20px;
            color: var(--text-secondary);
            text-decoration: none;
            border-radius: 12px;
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            font-size: 0.9rem;
            font-weight: 500;
            position: relative;
            overflow: hidden;
            background: var(--bg-glass);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border);
        }

        .nav a::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--gradient);
            opacity: 0;
            transition: opacity 0.25s;
        }

        .nav a:hover, .nav a.active {
            color: var(--text);
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }

        .nav a:hover::before, .nav a.active::before {
            opacity: 0.15;
        }

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

        .section {
            background: var(--bg-card);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 24px;
            transition: all 0.3s ease;
            animation: fadeInUp 0.6s ease-out both;
            box-shadow: var(--shadow-md);
        }

        .section:hover {
            border-color: var(--border-light);
            box-shadow: var(--glow);
        }

        .section:nth-child(2) { animation-delay: 0.1s; }
        .section:nth-child(3) { animation-delay: 0.15s; }
        .section:nth-child(4) { animation-delay: 0.2s; }
        .section:nth-child(5) { animation-delay: 0.25s; }
        .section:nth-child(6) { animation-delay: 0.3s; }

        .section h2 {
            font-size: 1.4rem;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 600;
            color: var(--text);
        }

        .section h2 i {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--gradient);
            border-radius: 10px;
            font-size: 0.95rem;
            color: #fff;
        }

        .section h3 {
            font-size: 1.1rem;
            margin: 30px 0 16px;
            color: var(--primary-light);
            font-weight: 600;
        }

        .section h4 {
            font-size: 0.95rem;
            margin: 20px 0 10px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .section p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            font-size: 0.95rem;
        }

        .step {
            display: flex;
            gap: 16px;
            margin: 20px 0;
            padding: 24px;
            background: var(--bg-glass);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border-radius: 14px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .step:hover {
            border-color: var(--border-light);
            transform: translateX(4px);
            box-shadow: var(--shadow-md);
        }

        .step-num {
            width: 32px;
            height: 32px;
            background: var(--gradient);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 0.9rem;
            flex-shrink: 0;
            box-shadow: var(--shadow-sm);
        }

        .step-content h4 {
            font-size: 1rem;
            margin-bottom: 6px;
            color: var(--text);
            font-weight: 500;
        }

        .step-content p {
            font-size: 0.9rem;
            margin: 0;
            color: var(--text-secondary);
        }

        .code-block {
            background: var(--code-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            margin: 16px 0 20px;
            overflow: hidden;
            position: relative;
            transition: all 0.3s ease;
        }

        .code-block-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            background: rgba(0, 0, 0, 0.15);
            border-bottom: 1px solid var(--border);
        }

        .code-block-title {
            font-size: 0.75rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .code-block-title::before {
            content: '';
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            opacity: 0.6;
        }

        .code-lang {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--primary-light);
            background: rgba(79, 70, 229, 0.15);
            padding: 3px 8px;
            border-radius: 4px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .copy-btn {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            padding: 5px 12px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 0.7rem;
            font-weight: 500;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .copy-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .copy-btn i {
            font-size: 0.65rem;
        }

        .code-block pre {
            margin: 0;
            padding: 20px;
            font-family: 'JetBrains Mono', 'Consolas', monospace;
            font-size: 0.85rem;
            line-height: 1.8;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--border) transparent;
        }

        .code-block pre

        .code-block pre

        .code-block pre

        .code-block code {
            font-family: inherit;
        }

        .code-block .line {
            display: block;
            padding: 0 4px;
            margin: 0 -4px;
            border-radius: 4px;
        }

        .code-block .line-number {
            display: inline-block;
            width: 32px;
            color: var(--text-muted);
            opacity: 0.5;
            text-align: right;
            padding-right: 16px;
            margin-right: 12px;
            border-right: 1px solid var(--border);
            user-select: none;
            font-size: 0.75rem;
        }

        .code-keyword { color: #c792ea; }
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 14px;
            margin: 20px 0;
        }

        .feature-item {
            background: var(--bg-glass);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            padding: 22px;
            border-radius: 14px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .feature-item:hover {
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .feature-item h4 {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            font-size: 0.95rem;
            color: var(--text);
            font-weight: 500;
        }

        .feature-item h4 i {
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-glass);
            border-radius: 8px;
            color: var(--primary);
            font-size: 0.8rem;
            border: 1px solid var(--border);
        }

        .feature-item p {
            font-size: 0.85rem;
            margin: 0;
            color: var(--text-muted);
        }

        .params-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 16px 0;
            font-size: 0.9rem;
        }

        .params-table thead,
        .params-table tbody,
        .params-table th,
        .params-table td,
        .params-table tr {
            display: table;
            width: 100%;
            table-layout: fixed;
        }

        .params-table thead {
            display: table-header-group;
        }

        .params-table tbody {
            display: table-row-group;
        }

        .params-table tr {
            display: table-row;
        }

        .params-table th,
        .params-table td {
            display: table-cell;
        }

        .params-table th, .params-table td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }

        .params-table th {
            background: var(--bg-glass);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .params-table td {
            background: var(--bg-glass);
            color: var(--text-secondary);
        }

        .params-table th:first-child {
            border-radius: 10px 0 0 0;
        }

        .params-table th:last-child {
            border-radius: 0 10px 0 0;
        }

        .params-table td {
            background: rgba(0, 0, 0, 0.15);
            color: var(--text-secondary);
        }

        .params-table tr:last-child td:first-child {
            border-radius: 0 0 0 10px;
        }

        .params-table tr:last-child td:last-child {
            border-radius: 0 0 10px 0;
        }

        .params-table code {
            background: rgba(0, 212, 170, 0.12);
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 0.82rem;
            color: var(--primary-light);
            font-family: 'JetBrains Mono', monospace;
        }

        .info-box {
            background: var(--bg-glass);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 20px 24px;
            margin: 20px 0;
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .info-box i {
            color: var(--primary);
            margin-top: 2px;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .info-box p {
            margin: 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .warning-box {
            background: var(--bg-glass);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 20px 24px;
            margin: 20px 0;
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .warning-box i {
            color: var(--warning);
            margin-top: 2px;
            flex-shrink: 0;
        }

        .warning-box p {
            margin: 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            text-decoration: none;
            margin-bottom: 32px;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

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

        .theme-toggle {
            position: fixed;
            top: 20px;
            right: 20px;
            width: 44px;
            height: 44px;
            background: var(--bg-card);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 1000;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-md);
        }

        .theme-toggle:hover {
            border-color: var(--primary-light);
            transform: scale(1.05);
            box-shadow: var(--glow);
        }

        .theme-toggle i {
            color: var(--text-secondary);
            font-size: 1.1rem;
            transition: all 0.3s ease;
        }

        .theme-toggle:hover i {
            color: var(--primary);
        }

        [data-theme="dark"] .theme-toggle .fa-sun {
            display: none;
        }

        [data-theme="dark"] .theme-toggle .fa-moon {
            display: block;
        }

        [data-theme="light"] .theme-toggle .fa-sun {
            display: block;
        }

        [data-theme="light"] .theme-toggle .fa-moon {
            display: none;
        }

        :not([data-theme]) .theme-toggle .fa-sun {
            display: block;
        }

        :not([data-theme]) .theme-toggle .fa-moon {
            display: none;
        }

        .footer {
            text-align: center;
            padding: 50px 0 30px;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .footer a {
            color: var(--primary);
            text-decoration: none;
        }

        .footer a:hover {
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px 14px;
            }

            .header {
                padding: 15px 0 30px;
            }

            .header::before {
                width: 200px;
                height: 200px;
            }

            .header-badge {
                padding: 6px 12px;
                font-size: 0.75rem;
                margin-bottom: 16px;
            }

            .header h1 {
                font-size: 1.6rem;
                margin-bottom: 10px;
            }

            .header p {
                font-size: 0.9rem;
                padding: 0 10px;
            }

            .nav {
                gap: 4px;
                margin-bottom: 28px;
                padding: 0 10px;
                overflow-x: auto;
                justify-content: flex-start;
                flex-wrap: nowrap;
                -webkit-overflow-scrolling: touch;
            }

            .nav a {
                padding: 8px 12px;
                font-size: 0.8rem;
                white-space: nowrap;
                flex-shrink: 0;
            }

            .section {
                padding: 20px 16px;
                border-radius: 14px;
                margin-bottom: 14px;
            }

            .section h2 {
                font-size: 1.15rem;
                margin-bottom: 16px;
            }

            .section h2 i {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }

            .section h3 {
                font-size: 0.95rem;
                margin: 20px 0 10px;
            }

            .section h4 {
                font-size: 0.9rem;
                margin: 16px 0 8px;
            }

            .section p {
                font-size: 0.85rem;
                margin-bottom: 12px;
            }

            .step {
                padding: 16px;
                gap: 12px;
                margin: 14px 0;
                border-radius: 12px;
            }

            .step-num {
                width: 26px;
                height: 26px;
                font-size: 0.8rem;
                flex-shrink: 0;
            }

            .step-content h4 {
                font-size: 0.9rem;
                margin-bottom: 4px;
            }

            .step-content p {
                font-size: 0.8rem;
                margin: 0;
            }

            .code-block {
                margin: 12px 0 16px;
                border-radius: 12px;
            }

            .code-block-header {
                padding: 10px 12px;
            }

            .code-block-title {
                font-size: 0.7rem;
            }

            .code-block pre {
                padding: 12px;
                font-size: 0.7rem;
                line-height: 1.6;
            }

            .code-block .line-number {
                width: 24px;
                margin-right: 8px;
                font-size: 0.65rem;
            }

            .copy-btn {
                top: 8px;
                right: 8px;
                padding: 5px 10px;
                font-size: 0.7rem;
            }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }

            .feature-item {
                padding: 16px;
                border-radius: 12px;
            }

            .feature-item h4 {
                font-size: 0.9rem;
                gap: 8px;
            }

            .feature-item h4 i {
                width: 24px;
                height: 24px;
                font-size: 0.7rem;
            }

            .feature-item p {
                font-size: 0.8rem;
            }

            .params-table {
                font-size: 0.75rem;
                display: block;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }

            .params-table th, .params-table td {
                padding: 10px 10px;
                white-space: nowrap;
            }

            .info-box, .warning-box {
                padding: 14px 16px;
                gap: 10px;
                border-radius: 12px;
            }

            .info-box i, .warning-box i {
                font-size: 0.9rem;
                flex-shrink: 0;
            }

            .info-box p, .warning-box p {
                font-size: 0.8rem;
            }

            .back-link {
                margin-bottom: 20px;
                font-size: 0.85rem;
            }

            .theme-toggle {
                top: 12px;
                right: 12px;
                width: 38px;
                height: 38px;
            }

            .footer {
                padding: 30px 0 20px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 480px) {
            .header h1 {
                font-size: 1.4rem;
            }

            .nav {
                justify-content: flex-start;
            }

            .nav a {
                padding: 7px 10px;
                font-size: 0.75rem;
            }

            .section {
                padding: 16px 14px;
            }

            .section h2 {
                font-size: 1.05rem;
                gap: 8px;
            }

            .step {
                padding: 14px;
            }

            .step-num {
                width: 24px;
                height: 24px;
                font-size: 0.75rem;
            }

            .code-block pre {
                font-size: 0.7rem;
            }

            .feature-item {
                padding: 14px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

        @supports (-webkit-touch-callout: none) {
            .nav {
                flex-wrap: nowrap;
                overflow-x: auto;
            }
        }