/* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f7fa;
            font-size: 16px;
        }
		
		/* 去除所有a标签的下划线 */
        a {
		  color: inherit;      /* 继承父元素颜色 */
		  text-decoration: none; /* 去除下划线 */
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        /* 图标样式 - 使用Unicode字符和CSS伪元素 */
        .icon-home:before { content: "🏠"; margin-right: 5px; }
        .icon-folder:before { content: "📁"; margin-right: 5px; }
        .icon-file:before { content: "📄"; margin-right: 5px; }
        .icon-tag:before { content: "🏷️"; margin-right: 5px; }
        .icon-clock:before { content: "🕐"; margin-right: 5px; }
        .icon-hashtag:before { content: "#"; margin-right: 5px; font-weight: bold; }
        .icon-warning:before { content: "⚠️"; margin-right: 10px; }
        .icon-left:before { content: "←"; }
        .icon-right:before { content: "→"; }
        .icon-double-left:before { content: "«"; }
        .icon-double-right:before { content: "»"; }
        
        /* 面包屑导航 - 移动端优化 */
        .breadcrumb {
            background: #fff;
            padding: 12px 20px;
            margin-bottom: 20px;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            border-left: 4px solid #3498db;
            font-size: 0.9rem;
            word-wrap: break-word;
        }
        
        .breadcrumb a, .breadcrumb span {
            color: #666;
            text-decoration: none;
            display: inline-block;
            max-width: 100%;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        
        .breadcrumb a:hover {
            color: #3498db;
        }
        
        .breadcrumb .separator {
            margin: 0 5px;
            color: #999;
        }
        
        /* 页面标题 - 移动端优化 */
        .page-title {
            background: #fff;
            padding: 20px;
            margin-bottom: 20px;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }
        
        .page-title h1 {
            font-size: 1.8rem;
            color: #2c3e50;
            margin-bottom: 5px;
            word-wrap: break-word;
        }
        
        .page-title p {
            color: #7f8c8d;
            font-size: 0.95rem;
        }
        
        /* 分类导航 - 移动端优化 */
        .category-navigation {
            background: #fff;
            padding: 20px;
            margin-bottom: 20px;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }
        
        .category-navigation h2 {
            font-size: 1.6rem;
            color: #e74c3c;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        
        /* 一级分类列表样式 */
        .level1-categories {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .level1-category {
            border: 1px solid #eaeaea;
            border-radius: 6px;
            overflow: hidden;
        }
        
        .level1-title {
            background: #f8f9fa;
            padding: 15px 20px;
            border-bottom: 1px solid #eaeaea;
        }
        
        .level1-title h3 {
            font-size: 1.3rem;
            color: #2c3e50;
            font-weight: 600;
        }
        
        /* 二级分类卡片网格 - 移动端优化 */
        .level2-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            padding: 20px;
        }
        
        .level2-card {
            background: #f8f9fa;
            border: 1px solid #e0e0e0;
            border-radius: 6px;
            padding: 15px;
            transition: all 0.3s ease;
        }
        
        .level2-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            border-color: #3498db;
        }
        
        .level2-card a {
            color: #2c3e50;
            text-decoration: none;
            display: block;
        }
        
        .level2-card a:hover {
            color: #3498db;
        }
        
        .level2-card h4 {
            font-size: 1.1rem;
            margin-bottom: 5px;
            font-weight: 600;
        }
        
        .level2-card p {
            color: #7f8c8d;
            font-size: 0.9rem;
            line-height: 1.4;
        }
        
        /* 二级分类页面样式 - 三级分类网格 */
        .level3-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 15px;
        }
        
        .level3-card {
            background: #f8f9fa;
            border: 1px solid #e0e0e0;
            border-radius: 6px;
            padding: 15px;
            transition: all 0.3s ease;
        }
        
        .level3-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            border-color: #3498db;
        }
        
        .level3-card a {
            color: #2c3e50;
            text-decoration: none;
            display: block;
        }
        
        .level3-card a:hover {
            color: #3498db;
        }
        
        .level3-card h4 {
            font-size: 1.1rem;
            margin-bottom: 5px;
            font-weight: 600;
        }
        
        /* 文章列表样式 - 移动端优化 */
        .article-section {
            background: #fff;
            padding: 20px;
            border-radius: 6px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }
        
        .article-section h2 {
            font-size: 1.6rem;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        
        .article-count {
            color: #7f8c8d;
            font-size: 0.9em;
            margin-left: 10px;
        }
        
        .articles-container {
            display: grid;
            gap: 20px;
        }
        
        .article-item {
            background: #f9f9f9;
            border: 1px solid #e0e0e0;
            border-radius: 6px;
            padding: 20px;
            transition: all 0.3s ease;
        }
        
        .article-item:hover {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .article-title {
            font-size: 1.3rem;
            color: #2c3e50;
            margin-bottom: 10px;
        }
        
        .article-title a {
            color: #2c3e50;
            text-decoration: none;
        }
        
        .article-title a:hover {
            color: #3498db;
        }
        
        .article-meta {
            color: #7f8c8d;
            font-size: 0.9rem;
            margin-bottom: 15px;
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }
        
        .article-content {
            color: #555;
            line-height: 1.7;
            font-size: 1rem;
        }
        
        .no-articles {
            text-align: center;
            padding: 40px 20px;
            color: #7f8c8d;
            font-style: italic;
        }
        
        /* 分页导航样式 */
        .pagination {
            margin-top: 30px;
            text-align: center;
        }
        
        .pagination-info {
            margin-bottom: 15px;
            color: #7f8c8d;
            font-size: 0.9rem;
        }
        
        .pagination-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        
        .pagination a, .pagination span {
            display: inline-block;
            padding: 8px 15px;
            background: #fff;
            border: 1px solid #ddd;
            border-radius: 4px;
            text-decoration: none;
            color: #3498db;
            min-width: 40px;
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .pagination a:hover {
            background: #3498db;
            color: #fff;
            border-color: #3498db;
        }
        
        .pagination .current {
            background: #3498db;
            color: #fff;
            border-color: #3498db;
        }
        
        .pagination .disabled {
            color: #bbb;
            background: #f9f9f9;
            border-color: #eee;
            cursor: not-allowed;
        }
        
        .pagination-ellipsis {
            padding: 8px 5px;
            color: #999;
        }
        
        .pagination-first, .pagination-last {
            display: none;
        }
        
        .pagination-prev, .pagination-next {
            font-weight: bold;
        }
        
        /* 移动端触摸优化 */
        a, button, .level2-card, .level3-card, .article-item {
            -webkit-tap-highlight-color: transparent;
        }
        
        /* 响应式设计 - 针对平板 */
        @media (max-width: 768px) {
            .container {
                padding: 15px;
            }
            
            .breadcrumb {
                padding: 10px 15px;
                font-size: 0.85rem;
            }
            
            .page-title {
                padding: 15px;
            }
            
            .page-title h1 {
                font-size: 1.5rem;
            }
            
            .category-navigation {
                padding: 15px;
            }
            
            .category-navigation h2 {
                font-size: 1.4rem;
            }
            
            /* 移动端子分类网格优化 - 每行显示2个 */
            .level2-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
                padding: 12px;
            }
            
            .level2-card {
                padding: 12px;
            }
            
            .level2-card h4 {
                font-size: 1rem;
                margin-bottom: 3px;
            }
            
            .level2-card p {
                font-size: 0.8rem;
            }
            
            .level3-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            
            .level3-card {
                padding: 12px;
            }
            
            .level3-card h4 {
                font-size: 1rem;
            }
            
            .article-section {
                padding: 15px;
            }
            
            .article-section h2 {
                font-size: 1.4rem;
            }
            
            .article-item {
                padding: 15px;
            }
            
            .article-title {
                font-size: 1.2rem;
            }
            
            .article-meta {
                font-size: 0.85rem;
                gap: 10px;
            }
            
            .article-content {
                font-size: 0.95rem;
            }
            
            /* 移动端分页样式 */
            .pagination-links {
                gap: 5px;
            }
            
            .pagination a, .pagination span {
                padding: 6px 10px;
                min-width: 35px;
                font-size: 0.9rem;
            }
            
            .pagination-info {
                font-size: 0.85rem;
            }
        }
        
        /* 响应式设计 - 针对手机 */
        @media (max-width: 576px) {
            .container {
                padding: 10px;
            }
            
            .breadcrumb {
                padding: 8px 12px;
                font-size: 0.8rem;
                line-height: 1.4;
            }
            
            .breadcrumb a, .breadcrumb span {
                white-space: normal;
                line-height: 1.4;
            }
            
            .page-title {
                padding: 12px;
                margin-bottom: 15px;
            }
            
            .page-title h1 {
                font-size: 1.3rem;
            }
            
            .page-title p {
                font-size: 0.9rem;
            }
            
            .category-navigation {
                padding: 12px;
                margin-bottom: 15px;
            }
            
            .category-navigation h2 {
                font-size: 1.2rem;
                margin-bottom: 15px;
            }
            
            .level1-title {
                padding: 10px 12px;
            }
            
            .level1-title h3 {
                font-size: 1.1rem;
            }
            
            /* 手机端子分类网格 - 保持每行2个，但调整间距和字体 */
            .level2-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
                padding: 10px;
            }
            
            .level2-card {
                padding: 10px;
            }
            
            .level2-card h4 {
                font-size: 0.95rem;
            }
            
            .level2-card p {
                font-size: 0.75rem;
            }
            
            .level3-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            
            .level3-card {
                padding: 10px;
            }
            
            .level3-card h4 {
                font-size: 0.95rem;
            }
            
            .article-section {
                padding: 12px;
            }
            
            .article-section h2 {
                font-size: 1.2rem;
                margin-bottom: 15px;
            }
            
            .articles-container {
                gap: 12px;
            }
            
            .article-item {
                padding: 12px;
            }
            
            .article-title {
                font-size: 1.1rem;
                margin-bottom: 8px;
            }
            
            .article-meta {
                font-size: 0.8rem;
                gap: 8px;
                margin-bottom: 10px;
            }
            
            .article-content {
                font-size: 0.9rem;
                line-height: 1.6;
            }
            
            .no-articles {
                padding: 30px 15px;
            }
            
            .no-articles h3 {
                font-size: 1.1rem;
            }
            
            /* 手机端分页样式 */
            .pagination {
                margin-top: 20px;
            }
            
            .pagination-links {
                gap: 3px;
            }
            
            .pagination a, .pagination span {
                padding: 5px 8px;
                min-width: 30px;
                font-size: 0.85rem;
            }
            
            .pagination-prev, .pagination-next {
                padding: 5px 10px;
            }
            
            .pagination-info {
                font-size: 0.8rem;
                margin-bottom: 10px;
            }
        }
        
        /* 响应式设计 - 针对小手机（宽度小于400px） */
        @media (max-width: 400px) {
            .level2-grid,
            .level3-grid {
                grid-template-columns: 1fr; /* 在极小的屏幕上改为单列 */
                gap: 6px;
            }
            
            .level2-card,
            .level3-card {
                padding: 8px;
            }
            
            .level2-card h4,
            .level3-card h4 {
                font-size: 0.9rem;
            }
            
            .page-title h1 {
                font-size: 1.1rem;
            }
            
            .article-section h2 {
                font-size: 1.1rem;
            }
            
            .article-title {
                font-size: 1rem;
            }
            
            .article-meta {
                flex-direction: column;
                gap: 5px;
            }
            
            .category-navigation h2 {
                font-size: 1.1rem;
            }
            
            .level1-title h3 {
                font-size: 1rem;
            }
            
            .breadcrumb {
                font-size: 0.75rem;
            }
            
            /* 小手机分页样式 */
            .pagination-links {
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .pagination a, .pagination span {
                padding: 4px 6px;
                min-width: 28px;
                font-size: 0.8rem;
                margin-bottom: 5px;
            }
        }
        
        /* 横屏优化 */
        @media (orientation: landscape) and (max-height: 500px) {
            .container {
                padding: 10px;
            }
            
            .breadcrumb {
                padding: 8px 12px;
                margin-bottom: 10px;
            }
            
            .page-title, .category-navigation, .article-section {
                padding: 12px;
                margin-bottom: 12px;
            }
            
            .articles-container {
                gap: 10px;
            }
            
            /* 横屏时子分类可以显示更多列 */
            .level2-grid,
            .level3-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            
            /* 横屏时分页优化 */
            .pagination-links {
                gap: 6px;
            }
        }
        
        /* 大屏幕优化 */
        @media (min-width: 1200px) {
            .container {
                max-width: 1400px;
            }
            
            .level2-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
            
            .level3-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
            
            /* 大屏幕分页优化 */
            .pagination-links {
                gap: 10px;
            }
            
            .pagination a, .pagination span {
                padding: 10px 20px;
                min-width: 45px;
            }
        }