/* ===== 知识库页面独享CSS ===== */
        
        /* 页面标题区域 */
        .page-header {
            background: var(--gradient);
            color: white;
            padding: 150px 0 80px;
            text-align: center;
            margin-top: 70px;
            position: relative;
            overflow: hidden;
        }
        
        .page-header:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
            background-size: cover;
        }
        
        .page-header h1 {
            font-size: 3rem;
            margin-bottom: 20px;
            font-weight: 800;
            position: relative;
            z-index: 1;
        }
        
        .page-header p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        
        /* 知识库内容区域 */
        .knowledge-content {
            padding: 80px 0;
        }
        
        .articles-list {
            display: grid;
            gap: 30px;
        }
        
        .article-item {
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 30px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            overflow: hidden;
            transition: var(--transition);
            opacity: 0;
            transform: translateY(20px);
        }
        
        .article-item.animate {
            opacity: 1;
            transform: translateY(0);
        }
        
        .article-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.15);
        }
        
        .article-thumbnail {
            position: relative;
            overflow: hidden;
        }
        
        .article-thumbnail:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient);
            opacity: 0.1;
            z-index: 1;
            transition: var(--transition);
        }
        
        .article-item:hover .article-thumbnail:before {
            opacity: 0;
        }
        
        .article-thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .article-item:hover .article-thumbnail img {
            transform: scale(1.05);
        }
        
        .article-content {
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .article-meta {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            color: #666;
            font-size: 0.9rem;
        }
        
        .article-meta span {
            margin-right: 20px;
            display: flex;
            align-items: center;
        }
        
        .article-meta i {
            margin-right: 5px;
            color: var(--primary-color);
        }
        
        .article-item h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            font-weight: 700;
        }
        
        .article-item h3 a {
            color: var(--dark-color);
            text-decoration: none;
            transition: var(--transition);
            /* 确保没有下划线 */
            border-bottom: none;
        }
        
        .article-item h3 a:hover {
            color: var(--primary-color);
        }
        
        .article-excerpt {
            color: #666;
            margin-bottom: 20px;
            line-height: 1.7;
        }
        
        .read-more {
            display: inline-flex;
            align-items: center;
            color: var(--primary-color);
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            margin-top: auto;
        }
        
        .read-more:hover {
            color: var(--secondary-color);
            transform: translateX(5px);
        }
        
        .read-more i {
            margin-left: 5px;
            transition: var(--transition);
        }
        
        .read-more:hover i {
            transform: translateX(3px);
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 50px;
            gap: 10px;
        }
        
        .page-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: white;
            color: var(--text-color);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
        }
        
        .page-num:hover {
            background: var(--gradient);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(26, 115, 232, 0.3);
        }
        
        .page-num-current {
            background: var(--gradient);
            color: white;
            box-shadow: 0 5px 15px rgba(26, 115, 232, 0.3);
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .article-item {
                grid-template-columns: 250px 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            
            nav.active {
                max-height: 300px;
            }
            
            nav ul {
                flex-direction: column;
                padding: 20px 0;
            }
            
            nav ul li {
                margin: 10px 0;
            }
            
            .page-header h1 {
                font-size: 2.5rem;
            }
            
            .article-item {
                grid-template-columns: 1fr;
            }
            
            .article-thumbnail {
                height: 200px;
            }
            
            .article-item h3 {
                font-size: 1.3rem;
            }
            
            .pagination {
                flex-wrap: wrap;
            }
        }
        
        @media (max-width: 576px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
            
            .page-header h1 {
                font-size: 2rem;
            }
            
            .phone-number {
                font-size: 0.9rem;
                padding: 6px 12px;
            }
            
            .article-content {
                padding: 20px;
            }
        }