/* 独享CSS - 知识库页面 */
        
        /* 页面头部 */
        .page-header {
            background: var(--gradient);
            color: white;
            padding: 150px 0 80px;
            margin-top: 70px;
            text-align: center;
            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 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,128L48,117.3C96,107,192,85,288,101.3C384,117,480,171,576,170.7C672,171,768,117,864,101.3C960,85,1056,107,1152,122.7C1248,139,1344,149,1392,154.7L1440,160L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
            background-size: cover;
            background-position: center;
        }
        
        .page-header-content {
            position: relative;
            z-index: 1;
        }
        
        .page-header h1 {
            font-size: 48px;
            margin-bottom: 20px;
        }
        
        .page-header p {
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto;
            opacity: 0.9;
        }
        
        /* 知识库内容 */
        .knowledge-content {
            padding: 80px 0;
            background-color: var(--light-color);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: var(--primary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: var(--gradient-accent);
        }
        
        .section-title p {
            color: #666;
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* 分类筛选 */
        .category-filter {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 40px;
        }
        
        .category-btn {
            padding: 10px 20px;
            background: white;
            border: 1px solid #ddd;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            color: var(--dark-color);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .category-btn:hover,
        .category-btn.active {
            background: var(--gradient);
            color: white;
            border-color: transparent;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        
        /* 文章列表 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            margin-bottom: 50px;
        }
        
        .article-item {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            opacity: 0;
            transform: translateY(30px);
        }
        
        .article-item.animate {
            opacity: 1;
            transform: translateY(0);
        }
        
        .article-item:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-heavy);
        }
        
        .article-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        
        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .article-item:hover .article-image img {
            transform: scale(1.1);
        }
        
        .article-category {
            position: absolute;
            top: 15px;
            left: 15px;
            background: var(--gradient-accent);
            color: white;
            padding: 5px 10px;
            border-radius: 3px;
            font-size: 12px;
            font-weight: 600;
        }
        
        .article-content {
            padding: 25px;
        }
        
        .article-content h3 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--primary-color);
        }
        
        .article-content h3 a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
            /* 确保链接无下划线 */
            text-decoration: none !important;
            border-bottom: none !important;
        }
        
        .article-content h3 a:hover {
            color: var(--secondary-color);
        }
        
        .article-content p {
            color: #666;
            margin-bottom: 15px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: #888;
            font-size: 14px;
        }
        
        .article-meta span {
            display: flex;
            align-items: center;
        }
        
        .article-meta i {
            margin-right: 5px;
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 50px;
            gap: 5px;
        }
        
        .page-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 5px;
            background: white;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: var(--shadow);
        }
        
        .page-num:hover {
            background: var(--gradient);
            color: white;
            transform: translateY(-3px);
        }
        
        .page-num-current {
            background: var(--gradient);
            color: white;
        }
        
        /* 热门文章 */
        .popular-articles {
            padding: 80px 0;
            background: white;
        }
        
        .popular-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .popular-item {
            background: var(--light-color);
            border-radius: 10px;
            padding: 25px;
            transition: all 0.3s ease;
        }
        
        .popular-item:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-heavy);
        }
        
        .popular-rank {
            display: inline-block;
            width: 30px;
            height: 30px;
            background: var(--gradient);
            color: white;
            border-radius: 50%;
            text-align: center;
            line-height: 30px;
            font-weight: 700;
            margin-bottom: 15px;
        }
        
        .popular-item h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--primary-color);
        }
        
        .popular-item h3 a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
            /* 确保链接无下划线 */
            text-decoration: none !important;
            border-bottom: none !important;
        }
        
        .popular-item h3 a:hover {
            color: var(--secondary-color);
        }
        
        .popular-meta {
            color: #888;
            font-size: 14px;
        }
        
        /* 响应式设计 - 独享部分 */
        @media (max-width: 992px) {
            .articles-list, .popular-grid {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .page-header h1 {
                font-size: 36px;
            }
            
            .category-filter {
                flex-direction: column;
                align-items: center;
            }
            
            .category-btn {
                width: 100%;
                max-width: 250px;
                text-align: center;
            }
        }