* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 640px;
            margin: 0 auto;
            background-color: #fff;
            min-height: 100vh;
        }
        
        header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            padding: 20px;
            text-align: center;
        }
        
        header h1 {
            font-size: 24px;
            font-weight: 600;
        }
        
        .nav {
            display: flex;
            justify-content: space-around;
            padding: 15px 0;
            background-color: #fff;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        .nav-item {
            text-align: center;
            flex: 1;
            padding: 15px 10px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }
        
        .nav-item:hover {
            background-color: #f0f0f0;
        }
        
        .nav-item a {
            text-decoration: none;
            color: #333;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        .nav-item img {
            width: 56px;
            height: 56px;
            background-color: #f0f4ff;
            padding: 12px;
        }
        
        .nav-item span {
            font-size: 14px;
            font-weight: 500;
            color: #333;
        }
        
        .section {
            padding: 20px;
        }
        
        .section-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
            display: flex;
            align-items: center;
        }
        
        .section-title::before {
            content: '';
            display: inline-block;
            width: 4px;
            height: 20px;
            background-color: #667eea;
            margin-right: 10px;
            border-radius: 2px;
        }
        
        .article-list {
            list-style: none;
        }
        
        .article-item {
            background-color: #fff;
            border-radius: 8px;
            padding: 15px;
            margin-bottom: 15px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
            transition: transform 0.2s ease;
        }
        
        .article-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .article-item a {
            text-decoration: none;
            color: #333;
        }
        
        .article-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        
        .article-meta {
            font-size: 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
        }
        
        .category-tag {
            background-color: #e6f0ff;
            color: #667eea;
            padding: 2px 8px;
            border-radius: 12px;
            font-size: 11px;
            font-weight: 500;
        }
        
        .publish-date {
            color: #999;
            font-size: 11px;
        }
        
        .footer {
            background-color: #f5f5f5;
            padding: 20px;
            text-align: center;
            font-size: 12px;
            color: #999;
            margin-top: 20px;
        }
        
        .more-btn {
            display: block;
            text-align: center;
            color: #667eea;
            text-decoration: none;
            font-size: 14px;
            margin-top: 10px;
            padding: 10px;
        }