/* 基础样式 */
        body { 
            background-color: #f5f5f5; 
            margin: 0; 
            padding: 0; 
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        /* 欢迎面板 */
        .welcome-panel {
            background: white;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 25px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
        }
        
        .welcome-panel h2 {
            font-size: 1.8rem;
            color: #2c3e50;
            margin-bottom: 12px;
        }
        
        .welcome-panel h4 {
            font-size: 1.2rem;
            color: #555;
            margin-top: 0;
            font-weight: normal;
        }
        
        /* 统计区域样式 */
        .stats-section {
            margin-top: 25px;
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
            flex: 1;
        }
        
        .section-title {
            font-size: 1.4rem;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid #f0f0f0;
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 70px;
            height: 2px;
            background: #3498db;
        }
        
        /* 圆形统计卡片 */
        .stats-grid {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .stat-card {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: 
                radial-gradient(circle, #e9ecef 0%, #dee2e6 100%),
                repeating-conic-gradient(#ffffff 0% 25%, transparent 0% 50%) 50% / 15px 15px;
            border: 3px solid #2c3e50;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .stat-card:hover {
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .stat-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: #2c3e50;
            z-index: 2;
        }
        
        .stat-label {
            font-size: 0.85rem;
            color: #495057;
            z-index: 2;
            margin-top: 5px;
        }
        
        /* 最近内容 */
        .recent-contents {
            margin-top: 25px;
        }
        
        .subsection-title {
            font-size: 1.1rem;
            color: #34495e;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        
        .subsection-title i {
            margin-right: 8px;
            color: #3498db;
        }
        
        .recent-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 15px;
        }
        
        .recent-item {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 12px;
            transition: all 0.2s;
            border-left: 3px solid #3498db;
        }
        
        .recent-item:hover {
            background: #edf2f7;
            transform: translateY(-3px);
        }
        
        .recent-title {
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            font-size: 0.95rem;
        }
        
        .recent-title i {
            margin-right: 6px;
            color: #3498db;
            font-size: 0.85rem;
        }
        
        .recent-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.75rem;
            color: #7f8c8d;
        }
        
        .recent-category {
            background: #e1f0fa;
            color: #2980b9;
            padding: 2px 5px;
            border-radius: 8px;
            font-size: 0.7rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 90px;
        }
        
        .no-recent {
            text-align: center;
            padding: 15px;
            color: #95a5a6;
            font-style: italic;
            font-size: 0.9rem;
            grid-column: span 4;
        }
        
        /* 内容列表页样式 */
        .content-list-panel {
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
            flex: 1;
        }
        
        .panel-title {
            font-size: 1.4rem;
            color: #2c3e50;
            margin-bottom: 15px;
            padding-bottom: 12px;
            border-bottom: 2px solid #f0f0f0;
        }
        
        /* 内容列表 - 每行4个卡片 */
        .content-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        
        @media (max-width: 1200px) {
            .content-list {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        
        @media (max-width: 992px) {
            .content-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 576px) {
            .content-list {
                grid-template-columns: 1fr;
            }
        }
        
        /* 16:9 宽高比卡片 */
        .content-item {
            position: relative;
            width: 100%;
            padding-top: 56.25%; /* 16:9 Aspect Ratio */
            border-radius: 8px;
            overflow: hidden;
            background: #f8f9fa;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .content-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.15);
        }
        
        .content-card {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 15px;
            text-align: center;
        }
        
        /* 内容信息 */
        .content-info {
            position: relative;
            z-index: 2;
            color: #2c3e50;
            transition: all 0.3s ease;
            background: rgba(255, 255, 255, 0.85);
            padding: 10px;
            border-radius: 8px;
            width: 100%;
        }
        
        .content-info h4 {
            margin: 0 0 6px 0;
            color: #2c3e50;
            display: flex;
            align-items: center;
            font-size: 1.1rem;
        }
        
        .media-stats {
            background: #e1f0fa;
            color: #2980b9;
            font-size: 0.75rem;
            padding: 2px 6px;
            border-radius: 8px;
            margin-left: 8px;
        }
        
        .meta {
            margin: 0;
            color: #7f8c8d;
            font-size: 0.85rem;
        }
        
        .view-btn {
            display: inline-block;
            background: #3498db;
            color: white;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.85rem;
            margin-top: 8px;
        }
        
        /* 子分类列表页 */
        .subcat-list-panel {
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
            flex: 1;
        }
        
        .subcat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 15px;
        }
        
        .subcat-card {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 12px;
            transition: all 0.2s;
        }
        
        .subcat-card:hover {
            background: #edf2f7;
            transform: translateY(-3px);
        }
        
        .subcat-card h4 {
            margin: 0 0 8px 0;
            color: #2c3e50;
            font-size: 1.1rem;
        }
        
        .subcat-card p {
            margin: 0;
            color: #7f8c8d;
            font-size: 0.85rem;
        }
        
        /* 页脚样式 */
        footer {
            background: #2c3e50;
            color: white;
            padding: 20px;
            text-align: center;
            margin-top: auto;
        }
        
        /* 无媒体内容 */
        .no-media .hover-preview {
            display: none !important;
        }
        
        /* 响应式调整 */
        @media (max-width: 1200px) {
            .recent-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .no-recent {
                grid-column: span 3;
            }
        }
        
        @media (max-width: 992px) {
            .sidebar {
                width: 200px;
            }
        }
        
        @media (max-width: 768px) {
            .front-container {
                flex-direction: column;
            }
            
            .sidebar {
                width: 100%;
                height: auto;
            }
            
            .recent-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .no-recent {
                grid-column: span 2;
            }
        }
        
        @media (max-width: 480px) {
            .recent-grid {
                grid-template-columns: 1fr;
            }
            
            .no-recent {
                grid-column: span 1;
            }
        }