* { margin: 0; padding: 0; box-sizing: border-box; }
        body { 
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6; 
            color: #333; 
            background: #f8f9fa;
        }
        
        .container { max-width: 800px; margin: 0 auto; padding: 20px; }
        
        .header {
            background: white;
            padding: 20px 0;
            border-bottom: 1px solid #e9ecef;
            margin-bottom: 30px;
        }
        
        .breadcrumb {
            color: #6c757d;
            font-size: 14px;
            margin-bottom: 10px;
        }
        
        .breadcrumb a {
            color: #007bff;
            text-decoration: none;
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        .article {
            background: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            margin-bottom: 30px;
        }
        
        .article-title {
            font-size: 2em;
            font-weight: bold;
            color: #2c3e50;
            margin-bottom: 20px;
            line-height: 1.3;
        }
        
        .article-meta {
            color: #6c757d;
            font-size: 14px;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 1px solid #e9ecef;
        }
        
        .article-meta span {
            margin-right: 15px;
        }
        
        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: #2c3e50;
        }
        
        .article-content p {
            margin-bottom: 20px;
        }
        
        .article-content h1, .article-content h2, .article-content h3 {
            margin: 30px 0 15px 0;
            color: #2c3e50;
        }
        
        .article-content h1 { font-size: 1.8em; }
        .article-content h2 { font-size: 1.5em; }
        .article-content h3 { font-size: 1.3em; }
        
        .article-content ul, .article-content ol {
            margin: 15px 0;
            padding-left: 30px;
        }
        
        .article-content li {
            margin-bottom: 8px;
        }
        
        .related-articles {
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        
        .related-articles h3 {
            font-size: 1.3em;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #007bff;
        }
        
        .related-item {
            padding: 15px 0;
            border-bottom: 1px solid #e9ecef;
        }
        
        .related-item:last-child {
            border-bottom: none;
        }
        
        .related-item a {
            color: #007bff;
            text-decoration: none;
            font-weight: 500;
        }
        
        .related-item a:hover {
            text-decoration: underline;
        }
        
        .related-item .summary {
            color: #6c757d;
            font-size: 14px;
            margin-top: 5px;
        }
        
        .footer {
            text-align: center;
            padding: 40px 20px;
            color: #6c757d;
            font-size: 14px;
        }
        
        .footer a {
            color: #007bff;
            text-decoration: none;
        }
        
        @media (max-width: 768px) {
            .container { padding: 10px; }
            .article { padding: 20px; }
            .article-title { font-size: 1.5em; }
            .related-articles { padding: 20px; }
        }