/* 知识库列表页独享CSS */
        main {
            margin-top: 80px;
            padding: 40px 0;
        }
        
        .page-header {
            text-align: center;
            margin-bottom: 40px;
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
            transform: translateY(30px);
        }
        
        .page-header h1 {
            font-size: 36px;
            color: var(--primary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .page-header h1::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
        }
        
        .page-header p {
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .knowledge-container {
            background-color: white;
            border-radius: 15px;
            box-shadow: var(--shadow);
            overflow: hidden;
            margin-bottom: 40px;
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
            transform: translateY(30px);
            animation-delay: 0.2s;
        }
        
        .knowledge-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .knowledge-header h2 {
            font-size: 24px;
            font-weight: 600;
        }
        
        .category-filter {
            display: flex;
            gap: 15px;
        }
        
        .category-filter select {
            padding: 8px 15px;
            border: none;
            border-radius: 5px;
            background-color: rgba(255, 255, 255, 0.2);
            color: white;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .category-filter select:hover {
            background-color: rgba(255, 255, 255, 0.3);
        }
        
        .knowledge-list {
            padding: 0;
        }
        
        .knowledge-item {
            padding: 25px;
            border-bottom: 1px solid #eee;
            transition: var(--transition);
            display: flex;
            gap: 20px;
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
            transform: translateY(30px);
        }
        
        .knowledge-item:nth-child(1) { animation-delay: 0.3s; }
        .knowledge-item:nth-child(2) { animation-delay: 0.4s; }
        .knowledge-item:nth-child(3) { animation-delay: 0.5s; }
        .knowledge-item:nth-child(4) { animation-delay: 0.6s; }
        .knowledge-item:nth-child(5) { animation-delay: 0.7s; }
        .knowledge-item:nth-child(6) { animation-delay: 0.8s; }
        .knowledge-item:nth-child(7) { animation-delay: 0.9s; }
        .knowledge-item:nth-child(8) { animation-delay: 1.0s; }
        .knowledge-item:nth-child(9) { animation-delay: 1.1s; }
        .knowledge-item:nth-child(10) { animation-delay: 1.2s; }
        
        .knowledge-item:hover {
            background-color: rgba(52, 152, 219, 0.05);
            transform: translateX(10px);
        }
        
        .knowledge-image {
            flex: 0 0 200px;
            height: 150px;
            border-radius: 8px;
            overflow: hidden;
        }
        
        .knowledge-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .knowledge-item:hover .knowledge-image img {
            transform: scale(1.1);
        }
        
        .knowledge-content {
            flex: 1;
        }
        
        .knowledge-content h3 {
            font-size: 20px;
            margin-bottom: 10px;
            color: var(--primary-color);
        }
        
        .knowledge-content h3 a {
            color: inherit;
            transition: var(--transition);
            text-decoration: none; /* 确保没有下划线 */
            border-bottom: none; /* 确保没有边框 */
        }
        
        .knowledge-content h3 a:hover {
            color: var(--secondary-color);
            text-decoration: none; /* 确保悬停时也没有下划线 */
        }
        
        .knowledge-meta {
            display: flex;
            gap: 15px;
            color: #666;
            font-size: 14px;
            margin-bottom: 10px;
        }
        
        .knowledge-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        .knowledge-excerpt {
            color: #666;
            line-height: 1.6;
            margin-bottom: 15px;
        }
        
        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: var(--secondary-color);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
        }
        
        .read-more:hover {
            gap: 10px;
            color: var(--accent-color);
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 40px;
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
            transform: translateY(30px);
            animation-delay: 1.3s;
        }
        
        .page-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 5px;
            background-color: white;
            color: var(--text-color);
            font-weight: 600;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        
        .page-num:hover {
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
            color: white;
            transform: translateY(-3px);
        }
        
        .page-num-current {
            background: linear-gradient(135deg, var(--accent-color), #27ae60);
            color: white;
        }
        
        /* 动画关键帧 */
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes float {
            0% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-20px);
            }
            100% {
                transform: translateY(0px);
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .knowledge-item {
                flex-direction: column;
                gap: 15px;
            }
            
            .knowledge-image {
                flex: 0 0 auto;
                width: 100%;
                height: 200px;
            }
            
            .category-filter {
                flex-direction: column;
                gap: 10px;
            }
        }