/* 独享CSS - 知识库页面主体部分 */
        main {
            margin-top: 80px;
        }

        /* 页面标题区域 */
        .page-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: var(--text-light);
            padding: 60px 0;
            text-align: center;
        }

        .page-header h1 {
            font-size: 36px;
            margin-bottom: 15px;
        }

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

        /* 知识库列表区域 */
        .section {
            padding: 80px 0;
        }

        .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;
            left: 50%;
            bottom: -10px;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--accent-color);
        }

        .section-title p {
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }

        .knowledge-list {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .knowledge-item {
            background-color: var(--light-color);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            flex-wrap: wrap;
        }

        .knowledge-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }

        .knowledge-image {
            width: 300px;
            overflow: hidden;
        }

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

        .knowledge-item:hover .knowledge-image img {
            transform: scale(1.05);
        }

        .knowledge-content {
            padding: 25px;
            flex: 1;
            min-width: 300px;
        }

        .knowledge-content h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: var(--primary-color);
        }

        .knowledge-content h3 a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .knowledge-content p {
            margin-bottom: 15px;
            color: #555;
        }

        .knowledge-meta {
            display: flex;
            justify-content: space-between;
            color: #666;
            font-size: 14px;
            margin-top: 20px;
        }

        .knowledge-tags {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }

        .tag {
            background-color: #e9ecef;
            color: var(--dark-color);
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 12px;
        }

        .tag-primary {
            background-color: var(--primary-color);
            color: var(--text-light);
        }

        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 50px;
            gap: 5px;
        }

        .page-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: var(--light-color);
            color: var(--text-color);
            text-decoration: none;
            border-radius: 5px;
            transition: var(--transition);
            font-weight: 500;
        }

        .page-num:hover {
            background-color: var(--secondary-color);
            color: var(--text-light);
        }

        .page-num-current {
            background-color: var(--accent-color);
            color: var(--text-color);
        }

        /* 分类筛选 */
        .category-filter {
            display: flex;
            justify-content: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 10px;
        }

        .category-btn {
            background-color: var(--light-color);
            color: var(--text-color);
            padding: 8px 20px;
            border-radius: 30px;
            text-decoration: none;
            transition: var(--transition);
            font-size: 14px;
            border: 1px solid #ddd;
        }

        .category-btn:hover, .category-btn.active {
            background-color: var(--secondary-color);
            color: var(--text-light);
            border-color: var(--secondary-color);
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                flex-direction: column;
                background-color: var(--primary-color);
                transition: var(--transition);
                padding: 20px 0;
                box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-item {
                margin: 10px 0;
                text-align: center;
            }
            
            .knowledge-item {
                flex-direction: column;
            }
            
            .knowledge-image {
                width: 100%;
                height: 200px;
            }
            
            .page-header h1 {
                font-size: 28px;
            }
            
            .page-header p {
                font-size: 16px;
            }
        }