* { 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;
            background-image: linear-gradient(to bottom, #f1f3f4 0%, #e9ecef 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { color: #1a365d; margin-bottom: 1rem; font-weight: 700; line-height: 1.2; }
        h1 { font-size: 2.8rem; margin-top: 2rem; border-bottom: 4px solid #e63946; padding-bottom: 0.5rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; color: #2d4a8a; }
        h3 { font-size: 1.8rem; margin-top: 2rem; color: #3a5f8e; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; color: #4a7090; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        a { color: #2563eb; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e63946; text-decoration: underline; }
        .lead { font-size: 1.25rem; font-weight: 300; color: #4a5568; }
        .highlight { background-color: #fff3cd; padding: 0.2rem 0.5rem; border-radius: 3px; font-weight: 600; }
        .emoji { font-size: 1.2em; margin-right: 0.3rem; }
        blockquote {
            border-left: 5px solid #e63946;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        header { background: linear-gradient(135deg, #1a365d 0%, #2d4a8a 100%); color: white; 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; padding: 1rem 20px; }
        .logo a { font-size: 2.2rem; font-weight: 900; color: white; text-decoration: none; font-family: 'Impact', 'Arial Black', sans-serif; letter-spacing: 1px; text-transform: uppercase; background: linear-gradient(to right, #f8f9fa, #e63946); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .logo a:hover { text-decoration: none; }
        .main-nav ul { display: flex; list-style: none; }
        .main-nav li { margin-left: 2rem; }
        .main-nav a { color: #e2e8f0; font-weight: 600; padding: 0.5rem 0; position: relative; }
        .main-nav a:after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background-color: #e63946; transition: width 0.3s ease; }
        .main-nav a:hover { color: white; }
        .main-nav a:hover:after { width: 100%; }
        .hamburger { display: none; font-size: 1.8rem; background: none; border: none; color: white; cursor: pointer; }
        .breadcrumb { background-color: #e9ecef; padding: 0.8rem 20px; font-size: 0.9rem; }
        .breadcrumb a { color: #4a5568; }
        .breadcrumb a:hover { color: #1a365d; }
        .breadcrumb span { color: #718096; }
        .search-container { background-color: #2d4a8a; padding: 1.5rem 20px; text-align: center; }
        .search-box { max-width: 600px; margin: 0 auto; display: flex; }
        .search-box input { flex-grow: 1; padding: 0.85rem 1rem; border: none; border-radius: 8px 0 0 8px; font-size: 1rem; }
        .search-box button { background-color: #e63946; color: white; border: none; padding: 0 1.5rem; border-radius: 0 8px 8px 0; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background-color 0.3s; }
        .search-box button:hover { background-color: #c1121f; }
        main { flex-grow: 1; padding: 2rem 0; }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        .article-content { background-color: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 6px 20px rgba(0,0,0,0.08); }
        .article-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 1px solid #e2e8f0; font-size: 0.95rem; color: #718096; }
        .article-img { margin: 2rem auto; border-radius: 10px; overflow: hidden; box-shadow: 0 8px 25px rgba(0,0,0,0.15); }
        .article-img figcaption { text-align: center; font-style: italic; padding: 0.8rem; color: #666; background-color: #f8f9fa; }
        .related-links { background-color: #edf2f7; padding: 1.5rem; border-radius: 10px; margin: 2.5rem 0; }
        .related-links h3 { margin-top: 0; }
        .related-links ul { list-style-position: inside; }
        .related-links li { margin-bottom: 0.7rem; }
        .sidebar { }
        .sidebar-widget { background-color: white; padding: 1.8rem; border-radius: 12px; margin-bottom: 2rem; box-shadow: 0 4px 12px rgba(0,0,0,0.07); }
        .sidebar-widget h3 { font-size: 1.5rem; margin-top: 0; padding-bottom: 0.7rem; border-bottom: 2px solid #e63946; }
        .toc ul { list-style: none; }
        .toc li { margin-bottom: 0.8rem; }
        .toc a { display: block; padding: 0.5rem; border-radius: 5px; }
        .toc a:hover { background-color: #edf2f7; }
        .interactive-module { background: linear-gradient(to bottom right, #1a365d, #2d4a8a); color: white; padding: 2rem; border-radius: 12px; margin: 2.5rem 0; }
        .interactive-module h3 { color: white; }
        .rating-stars { display: flex; justify-content: center; gap: 0.5rem; margin: 1.5rem 0; }
        .rating-stars input { display: none; }
        .rating-stars label { font-size: 2rem; color: #ccc; cursor: pointer; transition: color 0.2s; }
        .rating-stars label:hover,
        .rating-stars label:hover ~ label,
        .rating-stars input:checked ~ label { color: #ffc107; }
        .form-group { margin-bottom: 1.5rem; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.9rem; border: 1px solid #cbd5e0; border-radius: 8px; font-size: 1rem; font-family: inherit; }
        .form-group textarea { min-height: 150px; resize: vertical; }
        .submit-btn { background-color: #e63946; color: white; border: none; padding: 1rem 2rem; border-radius: 8px; font-size: 1.1rem; font-weight: 600; cursor: pointer; transition: background-color 0.3s; display: block; width: 100%; }
        .submit-btn:hover { background-color: #c1121f; }
        footer { background-color: #1a365d; color: #cbd5e0; padding: 3rem 0 1.5rem; margin-top: 4rem; }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2.5rem; margin-bottom: 2.5rem; }
        .footer-section h4 { color: #f8f9fa; margin-bottom: 1.2rem; font-size: 1.3rem; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #a0aec0; }
        .footer-links a:hover { color: #e63946; }
        friend-link { display: block; padding: 1rem; background-color: #2d3748; border-radius: 8px; margin-top: 1rem; }
        friend-link a { color: #63b3ed; font-weight: bold; }
        .copyright { text-align: center; padding-top: 1.5rem; border-top: 1px solid #2d4a8a; color: #a0aec0; font-size: 0.9rem; }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-container { flex-wrap: wrap; }
            .main-nav { order: 3; width: 100%; display: none; margin-top: 1rem; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; }
            .main-nav li { margin: 0; border-top: 1px solid rgba(255,255,255,0.1); }
            .main-nav a { display: block; padding: 1rem; }
            .hamburger { display: block; }
            .article-content { padding: 1.5rem; }
            .content-grid { gap: 2rem; }
        }