:root {
            --primary-color: #c62828;
            --primary-dark: #8e0000;
            --primary-light: #ff5f52;
            --secondary-color: #1a237e;
            --secondary-light: #534bae;
            --dark-color: #212121;
            --light-color: #f5f5f5;
            --gray-color: #757575;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            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: var(--dark-color);
            background-color: #fafafa;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            padding: 12px 28px;
            border-radius: var(--border-radius);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .section-title {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            color: var(--secondary-color);
            position: relative;
            padding-bottom: 10px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--secondary-color);
        }
        nav ul {
            display: flex;
            gap: 30px;
        }
        nav a {
            font-weight: 600;
            color: var(--dark-color);
            padding: 5px 0;
            position: relative;
        }
        nav a:hover {
            color: var(--primary-color);
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: var(--transition);
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark-color);
        }
        .breadcrumb {
            padding: 15px 20px;
            background: var(--light-color);
            border-bottom: 1px solid #eee;
        }
        .breadcrumb ul {
            display: flex;
            gap: 10px;
            font-size: 0.9rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: var(--gray-color);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        main {
            padding: 40px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 40px;
            border-bottom: 2px solid var(--light-color);
            padding-bottom: 30px;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--dark-color);
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            gap: 20px;
            color: var(--gray-color);
            font-size: 0.95rem;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .content-section {
            margin-bottom: 50px;
        }
        h2 {
            font-size: 1.8rem;
            margin: 30px 0 20px;
            color: var(--secondary-color);
            padding-bottom: 8px;
            border-bottom: 1px dashed #ddd;
        }
        h3 {
            font-size: 1.5rem;
            margin: 25px 0 15px;
            color: var(--dark-color);
        }
        h4 {
            font-size: 1.2rem;
            margin: 20px 0 10px;
            color: var(--gray-color);
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .highlight {
            background-color: #fff8e1;
            border-left: 4px solid #ffc107;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: var(--light-color);
            padding: 20px;
            border-radius: var(--border-radius);
            text-align: center;
            border-top: 4px solid var(--primary-color);
        }
        .stat-card .number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
            margin-bottom: 10px;
        }
        .image-container {
            margin: 30px 0;
            position: relative;
        }
        .image-container figcaption {
            text-align: center;
            font-style: italic;
            color: var(--gray-color);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .related-links {
            background: #e8f4f8;
            padding: 25px;
            border-radius: var(--border-radius);
            margin: 30px 0;
        }
        .related-links h3 {
            margin-top: 0;
            color: var(--secondary-color);
        }
        .related-links ul {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .related-links li a {
            background: white;
            padding: 10px 20px;
            border-radius: 30px;
            display: block;
            font-weight: 600;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        .related-links li a:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-color);
            color: var(--secondary-color);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
        }
        .search-form button:hover {
            background: var(--secondary-light);
        }
        .rating-widget form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .stars {
            display: flex;
            gap: 5px;
            font-size: 1.5rem;
            color: #ffd700;
            cursor: pointer;
        }
        .stars i:hover {
            transform: scale(1.1);
        }
        .rating-widget input, .rating-widget textarea {
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .rating-widget button {
            align-self: flex-start;
        }
        .comment {
            border-bottom: 1px solid #eee;
            padding-bottom: 20px;
            margin-bottom: 20px;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--gray-color);
        }
        .comment-author {
            font-weight: 600;
            color: var(--secondary-color);
        }
        footer {
            background: var(--dark-color);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 20px;
            display: block;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin-top: 10px;
            padding: 10px 15px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--border-radius);
        }
        friend-link a:hover {
            color: var(--primary-light);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            nav ul {
                position: fixed;
                top: 70px;
                left: -100%;
                flex-direction: column;
                background: white;
                width: 100%;
                text-align: center;
                padding: 20px;
                box-shadow: var(--shadow);
                transition: var(--transition);
                gap: 0;
            }
            nav ul.active {
                left: 0;
            }
            nav ul li {
                margin: 15px 0;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                padding: 15px;
            }
            article {
                padding: 25px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .related-links ul {
                flex-direction: column;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.8rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }