/* ===== 知识库页面独享CSS ===== */
        .page-header {
            background-color: var(--primary-color);
            color: white;
            padding: 150px 0 80px;
            text-align: center;
            margin-top: 70px;
        }

        .page-header h1 {
            font-size: 42px;
            margin-bottom: 20px;
            text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3);
        }

        .page-header p {
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto;
            opacity: 0.9;
        }

        .knowledge-base {
            padding: 100px 0;
        }

        .category-title {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
        }

        .category-title h2 {
            font-size: 32px;
            color: var(--primary-color);
            display: inline-block;
            padding-bottom: 15px;
        }

        .category-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--secondary-color);
        }

        .knowledge-categories {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 50px;
        }

        .category-btn {
            background-color: white;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .category-btn:hover, .category-btn.active {
            background-color: var(--primary-color);
            color: white;
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }

        .article-card {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            opacity: 0;
            transform: translateY(30px);
        }

        .article-card.animate {
            opacity: 1;
            transform: translateY(0);
        }

        .article-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }

        .article-image {
            height: 200px;
            overflow: hidden;
        }

        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .article-card:hover .article-image img {
            transform: scale(1.1);
        }

        .article-content {
            padding: 25px;
        }

        .article-content h3 {
            margin-bottom: 10px;
        }

        .article-content h3 a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
            font-size: 20px;
            line-height: 1.4;
            /* 移除下划线 */
            text-decoration: none !important;
        }

        .article-content h3 a:hover {
            color: var(--secondary-color);
        }

        .article-meta {
            color: #888;
            font-size: 14px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .article-meta i {
            margin-right: 5px;
            color: var(--secondary-color);
        }

        .article-meta span {
            margin-right: 15px;
        }

        .article-excerpt {
            color: #666;
            margin-bottom: 15px;
            line-height: 1.6;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .article-tag {
            background-color: rgba(10, 42, 90, 0.1);
            color: var(--primary-color);
            padding: 4px 10px;
            border-radius: 15px;
            font-size: 12px;
            transition: var(--transition);
        }

        .article-tag:hover {
            background-color: var(--primary-color);
            color: white;
        }

        /* 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: 5px;
            background-color: white;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border: 1px solid #e0e0e0;
        }

        .page-num:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .page-num-current {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .page-num i {
            font-size: 14px;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .articles-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .navbar {
                flex-wrap: wrap;
            }
            
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                margin-top: 20px;
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .nav-links li {
                margin: 10px 0;
            }
            
            .mobile-menu {
                display: block;
            }
            
            .page-header h1 {
                font-size: 36px;
            }
            
            .page-header p {
                font-size: 16px;
            }
            
            .articles-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .knowledge-base {
                padding: 60px 0;
            }
            
            .contact-phone {
                font-size: 16px;
            }
            
            .category-btn {
                padding: 6px 15px;
                font-size: 14px;
            }
            
            .pagination {
                flex-wrap: wrap;
            }
        }