* { margin: 0; padding: 0; box-sizing: border-box; }
        body { background: #f5f7fc; font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif; color: #1a2c3e; }
        
        .header { background: linear-gradient(135deg, #1e3c5c 0%, #2a5298 100%); color: white; padding: 16px 0; position: sticky; top: 0; z-index: 100; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
        .header .container { max-width: 1280px; margin: 0 auto; padding: 0 32px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
        .logo h1 { font-size: 22px; font-weight: 700; }
        .logo h1 i { color: #f59e0b; margin-right: 6px; }
        .nav { display: flex; gap: 28px; flex-wrap: wrap; }
        .nav a { color: white; text-decoration: none; font-weight: 500; transition: opacity 0.2s; }
        .nav a:hover { opacity: 0.8; }
        .nav a.active { color: #f59e0b; border-bottom: 2px solid #f59e0b; padding-bottom: 4px; }
        
        .main { max-width: 1000px; margin: 32px auto; padding: 0 32px; }
        .breadcrumb { margin-bottom: 20px; font-size: 14px; color: #64748b; }
        .breadcrumb a { color: #2c9cd4; text-decoration: none; }
        
        .article-card { background: white; border-radius: 24px; overflow: hidden; border: 1px solid #e2e8f0; }
        .article-header { padding: 32px; border-bottom: 1px solid #eef2f6; }
        .article-title { font-size: 28px; font-weight: 700; margin-bottom: 16px; line-height: 1.3; }
        .article-meta { display: flex; gap: 24px; flex-wrap: wrap; font-size: 13px; color: #94a3b8; }
        .article-meta i { margin-right: 6px; }
        .article-content { padding: 32px; line-height: 1.8; font-size: 16px; color: #334155; }
        .article-content p { margin-bottom: 20px; }
        .article-content img { max-width: 100%; height: auto; border-radius: 12px; margin: 20px 0; }
        .article-content h2, .article-content h3 { margin: 24px 0 12px; }
        
        .article-nav { display: flex; justify-content: space-between; padding: 20px 32px 32px; border-top: 1px solid #eef2f6; }
        .article-nav a { color: #2c9cd4; text-decoration: none; }
        .article-nav a:hover { text-decoration: underline; }
        
        .related-section { margin-top: 32px; }
        .related-title { font-size: 20px; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
        .related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
        .related-card { background: white; border-radius: 16px; overflow: hidden; border: 1px solid #e2e8f0; text-decoration: none; color: inherit; transition: all 0.3s; }
        .related-card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0,0,0,0.08); }
        .related-img { height: 120px; background: linear-gradient(135deg, #2c9cd4, #1a6e9e); display: flex; align-items: center; justify-content: center; color: white; font-size: 32px; }
        .related-img img { width: 100%; height: 100%; object-fit: cover; }
        .related-info { padding: 12px; }
        .related-title-sm { font-size: 14px; font-weight: 600; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        
        .footer { background: #0f172a; color: #94a3b8; text-align: center; padding: 40px 20px; margin-top: 40px; }
        
        @media (max-width: 768px) {
            .article-title { font-size: 22px; }
            .article-header { padding: 20px; }
            .article-content { padding: 20px; }
            .header .container { flex-direction: column; text-align: center; }
            .nav { justify-content: center; }
        }