/* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", Arial, sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
        }
        
        a {
            text-decoration: none;
            color: #0066cc;
        }
        
        a:hover {
            text-decoration: underline;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: #0066cc;
        }
        
        /* 导航栏 */
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 20px;
        }
        
        nav ul li a {
            color: #555;
            font-weight: 500;
        }
        
        /* 搜索框 */
        .search-box {
            margin: 30px 0;
            text-align: center;
        }
        
        .search-box input {
            width: 60%;
            max-width: 600px;
            padding: 12px 20px;
            border: 1px solid #ddd;
            border-radius: 24px;
            font-size: 16px;
            outline: none;
            box-shadow: 0 1px 6px rgba(32,33,36,0.1);
        }
        
        .search-box input:focus {
            border-color: #0066cc;
        }
        
        /* 主要内容 */
        .main-content {
            display: flex;
            margin: 30px 0;
        }
        
        .content-left {
            flex: 3;
            margin-right: 30px;
        }
        
        .content-right {
            flex: 1;
        }
        
        /* 特色内容卡片 */
        .feature-card {
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            padding: 20px;
            margin-bottom: 20px;
        }
        
        .feature-card h2 {
            color: #0066cc;
            margin-bottom: 15px;
            border-bottom: 1px solid #eee;
            padding-bottom: 10px;
        }
        
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .card-item {
            background-color: #f8f9fa;
            border-radius: 6px;
            padding: 15px;
            transition: transform 0.2s;
        }
        
        .card-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .card-item h3 {
            margin-bottom: 10px;
            color: #222;
        }
        
        .card-item p {
            color: #666;
            font-size: 14px;
        }
        
        /* 分类导航 */
        .categories h3 {
            margin-bottom: 15px;
            color: #444;
        }
        
        .categories ul {
            list-style: none;
        }
        
        .categories ul li {
            margin-bottom: 8px;
        }
        
        .categories ul li a {
            color: #555;
            display: block;
            padding: 8px 10px;
            border-radius: 4px;
        }
        
        .categories ul li a:hover {
            background-color: #f0f0f0;
            text-decoration: none;
        }
        
        /* 页脚 */
        footer {
            background-color: #333;
            color: #fff;
            padding: 40px 0 20px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        
        .footer-section {
            flex: 1;
            min-width: 200px;
            margin-bottom: 20px;
        }
        
        .footer-section h3 {
            margin-bottom: 15px;
            color: #fff;
        }
        
        .footer-section ul {
            list-style: none;
        }
        
        .footer-section ul li {
            margin-bottom: 8px;
        }
        
        .footer-section ul li a {
            color: #ccc;
        }
        
        .footer-section ul li a:hover {
            color: #fff;
        }
        
        .copyright {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .main-content {
                flex-direction: column;
            }
            
            .content-left {
                margin-right: 0;
                margin-bottom: 30px;
            }
            
            .header-container {
                flex-direction: column;
            }
            
            nav ul {
                margin-top: 15px;
            }
            
            .search-box input {
                width: 90%;
            }
        }