* { 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: #e0e0e0;
            background: linear-gradient(135deg, #0c1a2a 0%, #1a3a5f 100%);
            min-height: 100vh;
            background-attachment: fixed;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-family: Georgia, 'Times New Roman', Times, serif; color: #4fc3f7; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); text-align: center; margin: 2rem 0; border-bottom: 3px solid #ff9800; padding-bottom: 1rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); border-left: 5px solid #ff9800; padding-left: 1rem; margin-top: 2.5rem; }
        h3 { font-size: clamp(1.4rem, 3vw, 1.8rem); color: #81d4fa; margin-top: 2rem; }
        h4 { font-size: 1.3rem; color: #b3e5fc; margin-top: 1.5rem; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; text-align: justify; }
        a { color: #4fc3f7; text-decoration: none; transition: color 0.3s, transform 0.2s; }
        a:hover { color: #ff9800; transform: translateY(-2px); }
        strong { color: #ffcc80; font-weight: 700; }
        em { color: #ce93d8; font-style: italic; }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        main.container { background: rgba(13, 27, 42, 0.85); padding: 2rem; border-radius: 15px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); margin: 2rem auto; }
        header { background: linear-gradient(to right, #0d1b2a, #1b3a4b); padding: 1rem 0; border-bottom: 3px solid #ff9800; position: sticky; top: 0; z-index: 1000; }
        .header-content { display: flex; justify-content: space-between; align-items: center; }
        .my-logo { font-family: 'Impact', fantasy; font-size: 2.2rem; color: #ff9800; text-shadow: 2px 2px 4px #000; }
        .my-logo a:hover { color: #ff9800; transform: none; }
        .my-logo span { color: #4fc3f7; }
        nav ul { display: flex; list-style: none; gap: 2rem; }
        nav a { color: #bbdefb; padding: 0.5rem 1rem; border-radius: 5px; font-weight: 600; }
        nav a:hover { background: rgba(255, 152, 0, 0.2); }
        .hamburger { display: none; font-size: 1.8rem; color: #ff9800; cursor: pointer; background: none; border: none; }
        .breadcrumb { padding: 1rem 0; color: #90a4ae; font-size: 0.95rem; }
        .breadcrumb a { color: #bbdefb; }
        .breadcrumb span { color: #ff9800; }
        .search-box { margin: 2rem 0; text-align: center; }
        .search-form { display: flex; max-width: 600px; margin: 0 auto; }
        .search-input { flex: 1; padding: 0.9rem; border: 2px solid #1b5e20; border-radius: 8px 0 0 8px; background: #e8f5e9; color: #1b5e20; font-size: 1rem; }
        .search-button { padding: 0 1.5rem; background: #2e7d32; color: white; border: none; border-radius: 0 8px 8px 0; cursor: pointer; font-size: 1rem; transition: background 0.3s; }
        .search-button:hover { background: #1b5e20; }
        .article-intro { font-size: 1.3rem; color: #bbdefb; background: rgba(30, 60, 90, 0.5); padding: 1.5rem; border-radius: 10px; margin: 2rem 0; border-left: 5px solid #ff9800; }
        .highlight-box { background: linear-gradient(145deg, #1a237e, #311b92); padding: 1.5rem; border-radius: 10px; margin: 2rem 0; border: 2px solid #5c6bc0; }
        .tip { background: rgba(255, 193, 7, 0.1); border-left: 5px solid #ffc107; padding: 1rem; margin: 1.5rem 0; }
        .image-caption { text-align: center; font-style: italic; color: #b0bec5; margin-top: 0.5rem; font-size: 0.95rem; }
        .content-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin: 3rem 0; }
        .card { background: rgba(25, 40, 60, 0.8); padding: 1.5rem; border-radius: 10px; border-top: 4px solid #4fc3f7; transition: transform 0.3s, box-shadow 0.3s; }
        .card:hover { transform: translateY(-10px); box-shadow: 0 15px 25px rgba(0, 0, 0, 0.4); }
        ul, ol { padding-left: 2rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.7rem; }
        .user-module { background: rgba(40, 60, 90, 0.7); padding: 2rem; border-radius: 10px; margin: 3rem 0; border: 1px solid #546e7a; }
        .rating-stars { display: flex; gap: 0.5rem; justify-content: center; margin: 1rem 0; font-size: 1.8rem; }
        .rating-stars .star { color: #ccc; cursor: pointer; transition: color 0.3s; }
        .rating-stars .star:hover, .rating-stars .star.active { color: #ffd700; }
        .comment-form textarea, .score-form select, .comment-form input { width: 100%; padding: 0.8rem; margin-bottom: 1rem; border-radius: 8px; border: 1px solid #546e7a; background: #263238; color: #fff; }
        .form-button { background: linear-gradient(to right, #ff9800, #f57c00); color: white; padding: 0.8rem 2rem; border: none; border-radius: 8px; cursor: pointer; font-weight: bold; transition: opacity 0.3s; }
        .form-button:hover { opacity: 0.9; }
        footer { background: #0d1b2a; padding: 3rem 0 1.5rem; margin-top: 3rem; border-top: 3px solid #ff9800; }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
        friend-link { display: block; margin: 0.5rem 0; }
        .copyright { text-align: center; padding-top: 1.5rem; border-top: 1px solid #37474f; color: #90a4ae; font-size: 0.9rem; }
        @media (max-width: 768px) {
            .header-content { flex-wrap: wrap; }
            nav ul { display: none; flex-direction: column; width: 100%; background: #1b3a4b; position: absolute; top: 100%; left: 0; padding: 1rem; border-top: 2px solid #ff9800; }
            nav ul.active { display: flex; }
            .hamburger { display: block; }
            .search-form { flex-direction: column; }
            .search-input, .search-button { border-radius: 8px; width: 100%; margin-bottom: 0.5rem; }
        }