/* 页面标题样式 */
        .page-header {
            margin-top: 100px;
            padding: 60px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            text-align: center;
        }
        
        .page-header h1 {
            font-size: 42px;
            color: var(--secondary);
            margin-bottom: 20px;
            font-weight: 700;
        }
        
        .page-header p {
            font-size: 18px;
            color: var(--gray);
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 知识库文章列表样式 */
        .knowledge-section {
            padding: 80px 0;
        }
        
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }
        
        .knowledge-card {
            background-color: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .knowledge-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
        }
        
        .knowledge-image {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        
        .knowledge-image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 40%;
            background: linear-gradient(transparent, rgba(0,0,0,0.1));
        }
        
        .knowledge-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.7s ease;
        }
        
        .knowledge-card:hover .knowledge-image img {
            transform: scale(1.1);
        }
        
        .knowledge-content {
            padding: 25px;
        }
        
        .knowledge-content h2 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--secondary);
            font-weight: 600;
            line-height: 1.4;
        }
        
        .knowledge-content a {
            text-decoration: none;
            color: var(--secondary);
        }
        
        .knowledge-content p {
            color: var(--gray);
            margin-bottom: 20px;
            font-size: 14px;
            line-height: 1.6;
        }
        
        .knowledge-meta {
            display: flex;
            justify-content: space-between;
            color: #999;
            font-size: 13px;
        }
        
        /* 分页样式 */
        .pagination-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin: 60px 0;
            flex-wrap: wrap;
        }
        
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 20px auto;
        }
        
        .page-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            margin: 0 5px;
            border-radius: 8px;
            color: var(--dark);
            font-weight: 500;
            transition: var(--transition);
        }
        
        .page-num:hover {
            background-color: var(--light-gray);
            color: var(--primary);
        }
        
        .page-num-current {
            background-color: var(--primary);
            color: white;
        }
        
        .page-num-current:hover {
            background-color: var(--primary-dark);
            color: white;
        }
        
        .prev-next-links {
            display: flex;
            gap: 20px;
        }
        
        .prev-link, .next-link {
            display: flex;
            align-items: center;
            padding: 12px 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            color: var(--dark);
            font-weight: 500;
        }
        
        .prev-link:hover, .next-link:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
            color: var(--primary);
        }
        
        .prev-link i {
            margin-right: 8px;
        }
        
        .next-link i {
            margin-left: 8px;
        }
        
   
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .knowledge-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
            
            .pagination-container {
                flex-direction: column;
                gap: 30px;
            }
            
            .prev-next-links {
                width: 100%;
                justify-content: space-between;
            }
        }
        
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
            }
            
            nav ul {
                margin: 15px 0;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            nav li {
                margin: 0 10px 10px;
            }
            
            .phone-number {
                margin-top: 10px;
            }
            
            .page-header {
                margin-top: 120px;
                padding: 40px 0;
            }
            
            .page-header h1 {
                font-size: 32px;
            }
            
            .knowledge-section {
                padding: 50px 0;
            }
            
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 480px) {
            .page-header h1 {
                font-size: 28px;
            }
            
            .page-header p {
                font-size: 16px;
            }
            
            .prev-link, .next-link {
                padding: 10px 15px;
                font-size: 14px;
            }
        }