* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #fff;
            color: #333;
            line-height: 1.6;
        }
        
        /* 导航栏 */
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 48px;
            background: #fff;
            border-bottom: 1px solid #f0f0f0;
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .logo {
            font-size: 20px;
            font-weight: 600;
            color: #333;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .logo::before {
            content: "✉️";
            font-size: 24px;
        }
        
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
        }
        
        .nav-links a {
            color: #666;
            text-decoration: none;
            font-size: 15px;
            transition: color 0.2s;
        }
        
        .nav-links a:hover {
            color: #4a6cf7;
        }
        
        .nav-links a.active {
            color: #4a6cf7;
            font-weight: 500;
        }
        
        .nav-more {
            cursor: pointer;
            font-size: 20px;
            color: #666;
        }
        
        /* 主内容区 */
        .hero {
            max-width: 1200px;
            margin: 0 auto;
            padding: 80px 48px 60px;
        }
        
        .hero-badge {
            display: inline-block;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            padding: 8px 20px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
        }
        
        .hero-title {
            font-size: 56px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #1a1a1a;
        }
        
        .hero-title .highlight {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-subtitle {
            font-size: 24px;
            color: #666;
            margin-bottom: 32px;
            font-weight: 400;
        }
        
        .hero-desc {
            font-size: 18px;
            color: #888;
            margin-bottom: 40px;
            max-width: 600px;
        }
        
        /* 按钮组 */
        .hero-buttons {
            display: flex;
            gap: 16px;
            margin-bottom: 80px;
        }
        
        .btn {
            padding: 14px 32px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            box-shadow: 0 4px 14px rgba(102, 126, 234, 0.4);
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
        }
        
        .btn-secondary {
            background: #f5f5f5;
            color: #333;
        }
        
        .btn-secondary:hover {
            background: #e8e8e8;
        }
        
        .btn-outline {
            background: transparent;
            color: #4a6cf7;
            border: 2px solid #4a6cf7;
        }
        
        .btn-outline:hover {
            background: #4a6cf7;
            color: #fff;
        }
        
        /* 特性卡片 */
        .features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 60px;
        }
        
        .feature-card {
            background: #f8f9fa;
            border-radius: 16px;
            padding: 32px 24px;
            transition: all 0.3s;
            border: 1px solid transparent;
        }
        
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.08);
            border-color: #e8e8e8;
        }
        
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin-bottom: 20px;
        }
        
        .feature-icon.blue {
            background: #e8f0fe;
        }
        
        .feature-icon.green {
            background: #e6f4ea;
        }
        
        .feature-icon.orange {
            background: #fef3e8;
        }
        
        .feature-icon.purple {
            background: #f3e8fd;
        }
        
        .feature-title {
            font-size: 18px;
            font-weight: 600;
            color: #1a1a1a;
            margin-bottom: 12px;
        }
        
        .feature-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }
        
        /* API 预览区 */
        .api-preview {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            border-radius: 20px;
            padding: 48px;
            margin-top: 80px;
            color: #fff;
        }
        
        .api-preview-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 32px;
        }
        
        .api-preview-title {
            font-size: 28px;
            font-weight: 600;
        }
        
        .api-preview-badge {
            background: #4a6cf7;
            color: #fff;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
        }
        
        .code-block {
            background: #0d1117;
            border-radius: 12px;
            padding: 24px;
            font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
            font-size: 14px;
            overflow-x: auto;
            border: 1px solid #30363d;
        }
        
        .code-line {
            display: flex;
            gap: 16px;
            margin-bottom: 4px;
        }
        
        .code-line:last-child {
            margin-bottom: 0;
        }
        
        .line-num {
            color: #484f58;
            min-width: 24px;
            text-align: right;
            user-select: none;
        }
        
        .code-content {
            color: #c9d1d9;
        }
        
        .code-keyword {
            color: #ff7b72;
        }
        
        .code-string {
            color: #a5d6ff;
        }
        
        .code-function {
            color: #d2a8ff;
        }
        
        .code-comment {
            color: #8b949e;
        }
        
        /* 统计数据 */
        .stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 80px;
            padding: 48px;
            background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
            border-radius: 20px;
            border: 1px solid #e8e8e8;
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            font-size: 40px;
            font-weight: 700;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
        }
        
        .stat-label {
            font-size: 14px;
            color: #666;
        }
        
        /* 页脚 */
        .footer {
            margin-top: 100px;
            padding: 48px;
            background: #f8f9fa;
            border-top: 1px solid #e8e8e8;
            text-align: center;
        }
        
        .footer-text {
            color: #666;
            font-size: 14px;
        }
        
        .footer-contact {
            margin-top: 12px;
            color: #4a6cf7;
            font-size: 14px;
        }
        
        /* 响应式 */
        @media (max-width: 1024px) {
            .features {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .navbar {
                padding: 16px 24px;
            }
            
            .nav-links {
                display: none;
            }
            
            .hero {
                padding: 40px 24px;
            }
            
            .hero-title {
                font-size: 36px;
            }
            
            .hero-subtitle {
                font-size: 18px;
            }
            
            .hero-buttons {
                flex-direction: column;
            }
            
            .features {
                grid-template-columns: 1fr;
            }
            
            .stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
                padding: 32px 24px;
            }
            
            .stat-number {
                font-size: 28px;
            }
            
            .api-preview {
                padding: 24px;
            }
        }