* { margin: 0; padding: 0; box-sizing: border-box; }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
            background: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        
        
        .top-nav {
            background: #2c3e50;
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }
        
        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }
        
        .site-title {
            font-size: 20px;
            font-weight: bold;
            padding: 15px 0;
            color: white;
        }
        
        .nav-links {
            display: flex;
            gap: 30px;
        }
        
        .nav-links a {
            color: rgba(255,255,255,0.9);
            text-decoration: none;
            padding: 15px 0;
            font-size: 14px;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: white;
        }
        
        .bookmark-tip {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            text-align: center;
            padding: 8px;
            font-size: 13px;
        }
        
        
        .category-tabs {
            background: white;
            border-bottom: 1px solid #e0e0e0;
            position: sticky;
            top: 50px;
            z-index: 999;
        }
        
        .tabs-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            overflow-x: auto;
            gap: 5px;
        }
        
        .tabs-container::-webkit-scrollbar {
            height: 3px;
        }
        
        .tabs-container::-webkit-scrollbar-thumb {
            background: #ccc;
        }
        
        .category-tab {
            padding: 12px 20px;
            color: var(--category-color, #666);
            text-decoration: none;
            white-space: nowrap;
            border-bottom: 2px solid transparent;
            transition: all 0.3s;
            font-size: 14px;
        }
        
        .category-tab:hover {
            color: var(--category-color, #333);
            background: #f8f9fa;
        }
        
        .category-tab.active {
            color: var(--category-color, #667eea);
            border-bottom-color: var(--category-color, #667eea);
            font-weight: 500;
        }
        
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 20px;
        }
        
        
        .special-section {
            background: white;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
        
        .hot-section {
            background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
            border: 2px solid #ffebee;
        }
        
        .new-section {
            background: linear-gradient(135deg, #f0f4ff 0%, #ffffff 100%);
            border: 2px solid #e3f2fd;
        }
        
        .special-header {
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 3px solid;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .hot-header {
            color: #d32f2f;
            border-bottom-color: #ff5722;
        }
        
        .new-header {
            color: #1976d2;
            border-bottom-color: #2196f3;
        }
        
        
        .category-section {
            background: white;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
        
        .category-header {
            font-size: 18px;
            font-weight: bold;
            color: #2c3e50;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid;
            border-bottom-color: currentColor;
        }
        
        
        .links-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 12px;
        }
        
        
        .link-card {
            background: #fafafa;
            border: 1px solid #e8e8e8;
            border-radius: 6px;
            padding: 12px;
            text-decoration: none;
            color: #333;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            gap: 6px;
            position: relative;
        }
        
        .link-card:hover {
            background: white;
            border-color: #667eea;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
            transform: translateY(-2px);
        }
        
        .link-header {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .link-icon {
            width: 20px;
            height: 20px;
            border-radius: 4px;
            flex-shrink: 0;
        }
        
        .link-title {
            font-weight: 600;
            font-size: 14px;
            color: #2c3e50;
            flex: 1;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        
        .link-badge {
            position: absolute;
            top: -6px;
            right: -6px;
            font-size: 10px;
            padding: 2px 6px;
            border-radius: 8px;
            font-weight: bold;
            color: white;
        }
        
        .badge-hot {
            background: linear-gradient(135deg, #ff6b6b, #ff4757);
        }
        
        .badge-new {
            background: linear-gradient(135deg, #5352ed, #3742fa);
        }
        
        .link-desc {
            font-size: 12px;
            color: #666;
            line-height: 1.4;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        
        
        .footer {
            background: #2c3e50;
            color: rgba(255,255,255,0.7);
            text-align: center;
            padding: 30px 20px;
            margin-top: 40px;
            font-size: 13px;
        }
        
        .footer-stats {
            margin-bottom: 15px;
            color: white;
        }
        
        .footer-stats strong {
            color: #667eea;
        }
        
        
        .empty-state {
            text-align: center;
            padding: 80px 20px;
            background: white;
            border-radius: 8px;
        }
        
        .empty-icon {
            font-size: 80px;
            margin-bottom: 20px;
            opacity: 0.3;
        }
        
        .empty-btn {
            display: inline-block;
            padding: 14px 30px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            text-decoration: none;
            border-radius: 25px;
            margin-top: 20px;
            transition: all 0.3s;
            font-weight: 600;
        }
        
        .empty-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
        }
        
        
        @media (max-width: 1199px) {
            .links-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        
        @media (max-width: 991px) {
            .links-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        
        @media (max-width: 767px) {
            .links-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            
            .nav-links {
                display: none;
            }
            
            .category-section {
                padding: 15px;
            }
        }