* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #2a4365; --secondary: #c53030; --accent: #38b2ac;
            --dark: #1a202c; --light: #f7fafc; --gray: #718096;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --radius: 8px; --transition: all 0.3s ease;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7; color: var(--dark); background: #edf2f7;
            display: flex; flex-direction: column; min-height: 100vh;
        }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px;
        }
        header { background: var(--primary); color: white; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 1000; }
        .header-top { padding: 15px 0; display: flex; justify-content: space-between; align-items: center; }
        .my-logo {
            font-size: 2.2rem; font-weight: 800; letter-spacing: -1px;
            background: linear-gradient(90deg, #38b2ac, #c53030); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
        }
        .my-logo:hover { text-decoration: none; }
        .search-form { display: flex; flex: 0 1 400px; }
        .search-form input {
            flex: 1; padding: 10px 15px; border: none; border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-form button {
            background: var(--accent); color: white; border: none; padding: 10px 20px;
            border-radius: 0 var(--radius) var(--radius) 0; cursor: pointer;
        }
        .search-form button:hover { background: #2c9c96; }
        nav { background: var(--dark); }
        .nav-container { position: relative; }
        .main-nav { display: flex; list-style: none; }
        .main-nav li { position: relative; }
        .main-nav a {
            display: block; padding: 15px 20px; color: white; font-weight: 500;
            border-right: 1px solid #2d3748;
        }
        .main-nav a:hover { background: var(--secondary); text-decoration: none; }
        .hamburger {
            display: none; background: none; border: none; color: white; font-size: 1.8rem;
            cursor: pointer; padding: 10px;
        }
        .breadcrumb {
            padding: 12px 0; background: #e2e8f0; font-size: 0.9rem;
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--primary); }
        main { flex: 1; padding: 30px 0; }
        .content-grid {
            display: grid; grid-template-columns: 1fr 300px; gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        article {
            background: white; padding: 40px; border-radius: var(--radius); box-shadow: var(--shadow);
        }
        h1 { font-size: 2.8rem; color: var(--primary); margin-bottom: 20px; line-height: 1.2; }
        h2 { font-size: 2rem; color: var(--primary); margin: 40px 0 20px; padding-bottom: 10px; border-bottom: 3px solid var(--accent); }
        h3 { font-size: 1.6rem; color: var(--secondary); margin: 30px 0 15px; }
        h4 { font-size: 1.3rem; color: var(--dark); margin: 25px 0 10px; }
        p { margin-bottom: 20px; font-size: 1.1rem; }
        .intro { font-size: 1.3rem; color: var(--gray); font-weight: 500; margin-bottom: 30px; }
        .highlight { background: #feebc8; padding: 20px; border-left: 5px solid var(--secondary); border-radius: var(--radius); margin: 25px 0; }
        .stats-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin: 30px 0;
        }
        .stat-card {
            background: var(--light); padding: 20px; border-radius: var(--radius); text-align: center; box-shadow: var(--shadow);
            border-top: 4px solid var(--accent);
        }
        .stat-card i { font-size: 2.5rem; color: var(--accent); margin-bottom: 15px; }
        .figure {
            margin: 30px 0; text-align: center; padding: 15px; background: #f8f9fa; border-radius: var(--radius);
        }
        .figure img { border-radius: var(--radius); margin: 0 auto 10px; box-shadow: var(--shadow); }
        .figure figcaption { font-style: italic; color: var(--gray); font-size: 0.95rem; }
        ul, ol { margin-left: 25px; margin-bottom: 20px; }
        li { margin-bottom: 10px; }
        blockquote {
            border-left: 5px solid var(--accent); padding-left: 25px; margin: 30px 0; font-style: italic; color: var(--gray);
            background: #f8f9fa; padding: 20px; border-radius: 0 var(--radius) var(--radius) 0;
        }
        aside { background: white; padding: 25px; border-radius: var(--radius); box-shadow: var(--shadow); align-self: start; }
        .sidebar-widget { margin-bottom: 35px; }
        .sidebar-widget h3 { font-size: 1.4rem; margin-bottom: 20px; color: var(--primary); }
        .related-links li { margin-bottom: 12px; list-style: none; }
        .related-links li:before { content: "▶"; color: var(--accent); margin-right: 10px; }
        .user-interaction { background: white; padding: 30px; border-radius: var(--radius); box-shadow: var(--shadow); margin-top: 40px; }
        .rating-form, .comment-form { margin-bottom: 30px; }
        .rating-stars { display: flex; gap: 10px; margin: 15px 0; }
        .rating-stars input { display: none; }
        .rating-stars label { font-size: 2rem; color: #e2e8f0; cursor: pointer; transition: var(--transition); }
        .rating-stars input:checked ~ label { color: #e2e8f0; }
        .rating-stars label:hover, .rating-stars label:hover ~ label { color: #f6e05e; }
        .rating-stars input:checked + label { color: #f6e05e; }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; margin-bottom: 8px; font-weight: 600; }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%; padding: 12px; border: 1px solid #cbd5e0; border-radius: var(--radius);
            font-family: inherit; font-size: 1rem;
        }
        .form-group textarea { min-height: 150px; resize: vertical; }
        .btn {
            background: var(--secondary); color: white; padding: 12px 30px; border: none;
            border-radius: var(--radius); cursor: pointer; font-size: 1rem; font-weight: 600; transition: var(--transition);
        }
        .btn:hover { background: #9b2c2c; text-decoration: none; }
        footer { background: var(--dark); color: white; padding: 50px 0 20px; margin-top: 50px; }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-bottom: 40px; }
        .footer-links h3 { color: white; margin-bottom: 20px; font-size: 1.3rem; }
        .footer-links ul { list-style: none; margin-left: 0; }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { color: #cbd5e0; }
        .footer-links a:hover { color: white; text-decoration: underline; }
        friend-link {
            display: inline-block; background: #2d3748; color: #cbd5e0; padding: 8px 15px;
            border-radius: 20px; margin: 5px; font-size: 0.9rem;
        }
        friend-link a { color: #90cdf4; }
        .copyright {
            text-align: center; padding-top: 20px; border-top: 1px solid #4a5568; color: #a0aec0; font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-top { flex-direction: column; gap: 20px; }
            .search-form { flex: 1; width: 100%; }
            .main-nav { flex-direction: column; display: none; }
            .main-nav.active { display: flex; }
            .main-nav a { border-right: none; border-bottom: 1px solid #2d3748; }
            .hamburger { display: block; align-self: flex-end; }
            h1 { font-size: 2.2rem; }
            article, aside { padding: 25px; }
        }
        .text-center { text-align: center; }
        .mb-30 { margin-bottom: 30px; }
        .last-updated { color: var(--gray); font-style: italic; margin-bottom: 30px; }