* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: #0066cc; transition: color 0.3s ease; }
        a:hover { color: #004d99; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header { background: linear-gradient(135deg, #1a3a5f 0%, #2c5282 100%); color: white; padding: 1rem 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
        .header-container { display: flex; justify-content: space-between; align-items: center; }
        .logo a { font-size: 1.8rem; font-weight: 800; color: white; display: flex; align-items: center; gap: 10px; }
        .logo i { color: #fbbf24; }
        .desktop-nav ul { display: flex; list-style: none; gap: 2rem; }
        .desktop-nav a { color: #e2e8f0; font-weight: 600; padding: 0.5rem 0; position: relative; }
        .desktop-nav a:hover { color: #fbbf24; }
        .desktop-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: #fbbf24; transition: width 0.3s; }
        .desktop-nav a:hover::after { width: 100%; }
        .breadcrumb { background: #edf2f7; padding: 0.8rem 0; font-size: 0.9rem; }
        .breadcrumb ol { display: flex; list-style: none; flex-wrap: wrap; gap: 0.5rem; }
        .breadcrumb li:not(:last-child)::after { content: '/'; margin-left: 0.5rem; color: #718096; }
        .hamburger { display: none; font-size: 1.5rem; background: none; border: none; color: white; cursor: pointer; }
        .mobile-nav { display: none; background: #2c5282; position: absolute; top: 100%; left: 0; width: 100%; padding: 1rem; box-shadow: 0 5px 10px rgba(0,0,0,0.2); }
        .mobile-nav.active { display: block; }
        .mobile-nav ul { list-style: none; }
        .mobile-nav li { margin: 1rem 0; }
        .mobile-nav a { color: #e2e8f0; font-weight: 600; display: block; padding: 0.5rem; }
        .mobile-nav a:hover { background: #4a7bb8; border-radius: 4px; }
        .search-bar { margin: 2rem auto; max-width: 600px; }
        .search-form { display: flex; }
        .search-form input { flex: 1; padding: 0.8rem 1rem; border: 2px solid #cbd5e0; border-radius: 8px 0 0 8px; font-size: 1rem; }
        .search-form button { background: #2c5282; color: white; border: none; padding: 0 1.5rem; border-radius: 0 8px 8px 0; cursor: pointer; font-size: 1rem; transition: background 0.3s; }
        .search-form button:hover { background: #1a3a5f; }
        main { padding: 2rem 0; background: white; border-radius: 8px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); margin: 2rem auto; }
        .article-header { text-align: center; margin-bottom: 3rem; padding-bottom: 2rem; border-bottom: 2px dashed #e2e8f0; }
        .article-header h1 { font-size: 2.8rem; color: #1a3a5f; margin-bottom: 1rem; line-height: 1.2; }
        .meta-info { display: flex; justify-content: center; gap: 1.5rem; color: #718096; font-size: 0.9rem; margin-top: 1rem; }
        .content { padding: 0 2rem; }
        .content section { margin-bottom: 3rem; }
        h2 { font-size: 2rem; color: #2c5282; margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid #fbbf24; }
        h3 { font-size: 1.6rem; color: #4a7bb8; margin: 2rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #5a8fd3; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .highlight { background: #fff3cd; padding: 1rem; border-left: 4px solid #ffc107; margin: 1.5rem 0; border-radius: 0 8px 8px 0; }
        .stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin: 2rem 0; }
        .stat-card { background: #e8f4fd; padding: 1.5rem; border-radius: 8px; text-align: center; box-shadow: 0 4px 6px rgba(0,0,0,0.05); transition: transform 0.3s; }
        .stat-card:hover { transform: translateY(-5px); }
        .stat-card i { font-size: 2rem; color: #2c5282; margin-bottom: 1rem; }
        .stat-card h4 { color: #1a3a5f; }
        .featured-img { margin: 2.5rem auto; text-align: center; }
        .featured-img img { border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); max-height: 500px; object-fit: cover; }
        .img-caption { font-style: italic; color: #718096; margin-top: 0.5rem; font-size: 0.9rem; }
        .interactive-section { background: #f8f9fa; padding: 2rem; border-radius: 12px; margin: 3rem 0; border: 1px solid #e2e8f0; }
        .rating-form, .comment-form { margin-top: 1.5rem; }
        .stars { display: flex; gap: 0.5rem; margin: 1rem 0; }
        .stars i { color: #cbd5e0; cursor: pointer; font-size: 1.5rem; transition: color 0.2s; }
        .stars i:hover, .stars i.active { color: #fbbf24; }
        textarea, input[type="text"], input[type="email"] { width: 100%; padding: 0.8rem; margin-bottom: 1rem; border: 1px solid #cbd5e0; border-radius: 6px; font-family: inherit; }
        .btn { background: #2c5282; color: white; border: none; padding: 0.8rem 1.8rem; border-radius: 6px; cursor: pointer; font-weight: 600; transition: background 0.3s; display: inline-block; }
        .btn:hover { background: #1a3a5f; }
        footer { background: #1a202c; color: #cbd5e0; padding: 3rem 0 1.5rem; margin-top: 4rem; }
        .footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
        .footer-section h3 { color: #fbbf24; font-size: 1.3rem; margin-bottom: 1.2rem; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #a0aec0; }
        .footer-links a:hover { color: #fbbf24; }
        friend-link { display: block; background: #2d3748; padding: 1rem; border-radius: 6px; margin: 1rem 0; }
        friend-link a { color: #fbbf24; font-weight: bold; }
        .copyright { text-align: center; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid #4a5568; font-size: 0.9rem; color: #a0aec0; }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .desktop-nav { display: none; }
            .header-container { padding: 0 1rem; }
            .article-header h1 { font-size: 2rem; }
            .content { padding: 0 1rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            .stats-grid { grid-template-columns: 1fr; }
            .search-bar { margin: 2rem 1rem; }
        }