:root {
            --primary: #1a2a3a;
            --accent: #e74c3c;
            --secondary: #2ecc71;
            --bg: #f8f9fa;
            --card: #ffffff;
            --text: #2d3436;
            --text-light: #636e72;
            --border: #ddd;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); line-height: 1.75; }
        a { color: var(--accent); text-decoration: none; transition: all 0.3s ease; }
        a:hover { color: #c0392b; }
        .top-bar { background: var(--primary); color: #fff; padding: 8px 0; font-size: 14px; }
        .top-bar .container { display: flex; justify-content: space-between; align-items: center; }
        .header { background: var(--card); box-shadow: var(--shadow); position: sticky; top: 0; z-index: 1000; }
        .header .container { display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; }
        .my-logo { font-size: 2rem; font-weight: 900; color: var(--primary); letter-spacing: -1px; }
        .my-logo span { color: var(--accent); }
        .my-logo a { color: inherit; }
        .nav-menu { display: flex; gap: 25px; list-style: none; }
        .nav-menu a { color: var(--primary); font-weight: 600; padding: 8px 12px; border-radius: 6px; }
        .nav-menu a:hover { background: var(--accent); color: #fff; }
        .hamburger { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--primary); }
        .breadcrumb { background: #eef0f2; padding: 10px 0; font-size: 14px; border-bottom: 1px solid var(--border); }
        .breadcrumb .container { display: flex; gap: 8px; flex-wrap: wrap; }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--accent); }
        .hero { background: linear-gradient(135deg, #1a2a3a 0%, #2c3e50 50%, #e74c3c 100%); color: #fff; padding: 60px 20px; text-align: center; }
        .hero h1 { font-size: 3rem; font-weight: 900; margin-bottom: 15px; text-shadow: 2px 2px 10px rgba(0,0,0,0.3); }
        .hero p { font-size: 1.2rem; max-width: 800px; margin: 0 auto 20px; }
        .hero-badge { display: inline-block; background: rgba(255,255,255,0.2); padding: 8px 20px; border-radius: 30px; font-size: 14px; }
        .main-content { display: grid; grid-template-columns: 3fr 1fr; gap: 40px; padding: 40px 0; max-width: 1200px; margin: 0 auto; }
        .article-body { background: var(--card); padding: 40px; border-radius: 12px; box-shadow: var(--shadow); }
        .sidebar { background: var(--card); padding: 25px; border-radius: 12px; box-shadow: var(--shadow); height: fit-content; position: sticky; top: 90px; }
        .article-body h2 { font-size: 2rem; color: var(--primary); margin: 40px 0 20px; padding-bottom: 10px; border-bottom: 3px solid var(--accent); }
        .article-body h3 { font-size: 1.5rem; color: var(--primary); margin: 25px 0 15px; }
        .article-body h4 { font-size: 1.2rem; color: #555; margin: 15px 0 10px; }
        .article-body p { margin-bottom: 16px; color: var(--text-light); }
        .article-body ul, .article-body ol { margin-left: 20px; margin-bottom: 20px; color: var(--text-light); }
        .article-body li { margin-bottom: 8px; }
        .highlight-box { background: #fff5f5; border-left: 4px solid var(--accent); padding: 20px; border-radius: 8px; margin: 20px 0; }
        .info-box { background: #f0f7ff; border-left: 4px solid #2980b9; padding: 20px; border-radius: 8px; margin: 20px 0; }
        .tip-box { background: #f0fff4; border-left: 4px solid var(--secondary); padding: 20px; border-radius: 8px; margin: 20px 0; }
        .search-box { margin: 20px 0; }
        .search-box form { display: flex; gap: 10px; }
        .search-box input { flex: 1; padding: 14px 20px; border: 2px solid var(--border); border-radius: 30px; font-size: 16px; outline: none; transition: border-color 0.3s; }
        .search-box input:focus { border-color: var(--accent); }
        .search-box button { background: var(--accent); color: #fff; border: none; padding: 14px 25px; border-radius: 30px; font-size: 16px; cursor: pointer; transition: background 0.3s; }
        .search-box button:hover { background: #c0392b; }
        .rating-section { background: #fafbfc; padding: 30px; border-radius: 12px; margin: 40px 0; border: 1px solid var(--border); }
        .rating-stars { font-size: 2rem; color: #f1c40f; margin: 10px 0; display: flex; gap: 5px; cursor: pointer; }
        .rating-stars i { transition: transform 0.2s; }
        .rating-stars i:hover { transform: scale(1.2); }
        .rating-btn { background: var(--accent); color: #fff; border: none; padding: 12px 30px; border-radius: 30px; font-size: 16px; cursor: pointer; }
        .comment-section { margin: 40px 0; }
        .comment-form textarea { width: 100%; padding: 15px; border: 2px solid var(--border); border-radius: 10px; font-family: inherit; min-height: 120px; resize: vertical; }
        .comment-form input { width: 100%; padding: 12px 15px; border: 2px solid var(--border); border-radius: 10px; margin-bottom: 10px; }
        .comment-form button { background: var(--primary); color: #fff; border: none; padding: 14px 30px; border-radius: 30px; cursor: pointer; }
        .footer { background: var(--primary); color: #fff; padding: 40px 0 20px; margin-top: 60px; }
        .footer .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-bottom: 30px; }
        .footer a { color: #ccc; }
        .footer a:hover { color: var(--accent); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; text-align: center; font-size: 14px; color: #aaa; }
        .friend-link { display: block; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
        .data-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        .data-table th { background: var(--primary); color: #fff; padding: 12px; text-align: left; }
        .data-table td { padding: 12px; border-bottom: 1px solid var(--border); }
        .data-table tr:hover { background: #f5f5f5; }
        .article-image { width: 100%; border-radius: 12px; margin: 25px 0; box-shadow: var(--shadow); }
        .img-caption { text-align: center; color: var(--text-light); font-size: 14px; margin-bottom: 20px; }
        .toc { background: #f9f9f9; padding: 20px; border-radius: 10px; margin: 20px 0; border: 1px solid var(--border); }
        .toc h4 { color: var(--primary); margin-bottom: 10px; }
        .toc ul { list-style: none; margin-left: 0; }
        .toc li { padding: 5px 0; }
        .toc a { color: var(--text-light); }
        .toc a:hover { color: var(--accent); }
        @media (max-width: 768px) {
            .header .container { flex-wrap: wrap; }
            .nav-menu { display: none; width: 100%; flex-direction: column; gap: 0; padding: 10px 0; }
            .nav-menu.active { display: flex; }
            .hamburger { display: block; }
            .main-content { grid-template-columns: 1fr; padding: 20px; }
            .article-body { padding: 20px; }
            .hero h1 { font-size: 2rem; }
            .sidebar { position: static; order: 2; }
            .top-bar .container { flex-direction: column; gap: 5px; text-align: center; }
            .breadcrumb { font-size: 12px; }
        }
        @media (max-width: 480px) {
            .hero { padding: 40px 15px; }
            .hero h1 { font-size: 1.6rem; }
            .article-body h2 { font-size: 1.5rem; }
            .data-table { font-size: 14px; }
        }