:root {
            --primary: #0056b3;
            --secondary: #dc3545;
            --accent: #28a745;
            --dark: #212529;
            --light: #f8f9fa;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            font-size: 16px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--dark);
            color: var(--light);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .desktop-nav a:hover {
            color: #ffcc00;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #ffcc00;
            transition: width 0.3s;
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: var(--dark);
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav li {
            margin: 1rem 0;
        }
        .mobile-nav a {
            color: white;
            display: block;
            padding: 0.5rem;
            border-radius: var(--border-radius);
        }
        .mobile-nav a:hover {
            background: rgba(255,255,255,0.1);
        }
        .breadcrumb {
            padding: 1rem 0;
            background: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .search-container {
            padding: 2rem 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            text-align: center;
        }
        .search-box {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 10px;
        }
        .search-box input {
            flex: 1;
            padding: 15px;
            border: 2px solid var(--primary);
            border-radius: var(--border-radius);
            font-size: 1rem;
        }
        .search-box button {
            padding: 0 30px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: #003d82;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        .article-content h1 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: var(--primary);
            line-height: 1.2;
        }
        .article-content h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            color: var(--dark);
            border-bottom: 3px solid var(--accent);
            padding-bottom: 0.5rem;
        }
        .article-content h3 {
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
            color: var(--secondary);
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }
        .figure-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1rem;
            margin-bottom: 1.5rem;
        }
        .highlight-box {
            background: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .link-list {
            background: #e7f1ff;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .link-list h3 {
            color: var(--primary);
        }
        .link-list ul {
            list-style: none;
            columns: 2;
        }
        .link-list li {
            margin-bottom: 0.5rem;
        }
        @media (max-width: 768px) {
            .link-list ul {
                columns: 1;
            }
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--primary);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        .rating-form .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ffcc00;
            cursor: pointer;
        }
        .rating-form .stars i {
            transition: var(--transition);
        }
        .rating-form .stars i:hover {
            transform: scale(1.2);
        }
        .rating-form input, .rating-form textarea, .comment-form input, .comment-form textarea {
            width: 100%;
            padding: 12px;
            margin-bottom: 1rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .rating-form button, .comment-form button {
            width: 100%;
            padding: 12px;
            background: var(--accent);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .rating-form button:hover, .comment-form button:hover {
            background: #1e7e34;
        }
        .comment-list .comment {
            border-bottom: 1px solid #eee;
            padding: 1rem 0;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
            color: var(--gray);
            font-size: 0.9rem;
        }
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #ffcc00;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section li {
            margin-bottom: 0.8rem;
        }
        .footer-section a {
            color: #ccc;
        }
        .footer-section a:hover {
            color: white;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid #444;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-content h1 {
                font-size: 2rem;
            }
            .article-content h2 {
                font-size: 1.7rem;
            }
            .article-content h3 {
                font-size: 1.3rem;
            }
            .header-container, .footer-container {
                padding: 0 15px;
            }
        }
        .bold { font-weight: 700; color: var(--primary); }
        .emoji { margin-right: 5px; }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }