/* 产品系列区域 */
        .product-categories {
            padding: 80px 0;
            background-color: var(--light);
        }
        
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .category-card {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .category-header {
            background-color: var(--secondary);
            color: white;
            padding: 15px 20px;
            font-size: 1.2rem;
            font-weight: 600;
        }
        
        .category-content {
            padding: 20px;
        }
        
        .category-list {
            list-style: none;
        }
        
        .category-list li {
            margin-bottom: 10px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        .category-list a {
            color: var(--dark);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        
        .category-list i {
            margin-right: 10px;
            color: var(--primary);
        }