:root {
            --primary: #0056b3;
            --secondary: #00a8ff;
            --accent: #ff6b00;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --gray: #6c757d;
            --success: #28a745;
            --warning: #ffc107;
            --danger: #dc3545;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--secondary);
        }
        .logo i {
            font-size: 2rem;
            color: var(--accent);
        }
        nav.desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav.desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 8px 12px;
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
        }
        nav.desktop-nav a:hover,
        nav.desktop-nav a.active {
            background-color: var(--primary);
            color: white;
        }
        nav.desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background-color: var(--accent);
            transition: var(--transition);
        }
        nav.desktop-nav a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--dark);
            padding: 20px;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav li {
            margin-bottom: 15px;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-size: 1.1rem;
            display: block;
            padding: 10px;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background-color: var(--primary);
        }
        .breadcrumb {
            background-color: #f1f1f1;
            padding: 12px 0;
            font-size: 0.9rem;
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
        }
        .breadcrumb i {
            margin: 0 5px;
            font-size: 0.8rem;
            color: var(--gray);
        }
        main {
            padding: 40px 0;
            min-height: 80vh;
        }
        .article-header {
            text-align: center;
            margin-bottom: 50px;
            padding-bottom: 30px;
            border-bottom: 2px solid #eee;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 30px;
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-meta span i {
            margin-right: 8px;
            color: var(--primary);
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--radius);
            margin: 30px 0;
            box-shadow: var(--shadow);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            font-size: 1.1rem;
        }
        .article-content p {
            margin-bottom: 25px;
            text-align: justify;
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        .article-content h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin: 30px 0 15px;
        }
        .article-content h4 {
            font-size: 1.3rem;
            color: var(--gray);
            margin: 25px 0 10px;
        }
        .article-content ul, .article-content ol {
            margin-left: 30px;
            margin-bottom: 25px;
        }
        .article-content li {
            margin-bottom: 10px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding-left: 20px;
            margin: 30px 0;
            font-style: italic;
            color: var(--gray);
            background-color: #f9f9f9;
            padding: 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border-bottom: 1px dotted transparent;
        }
        .article-content a:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }
        .highlight-box {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 25px;
            border-radius: var(--radius);
            margin: 30px 0;
            border-left: 5px solid var(--accent);
        }
        .highlight-box h4 {
            color: var(--dark);
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .highlight-box i {
            color: var(--accent);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background-color: white;
            border-radius: var(--radius);
            padding: 20px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .stat-card h5 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .stat-card p {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            margin: 0;
        }
        .sidebar {
            background-color: #f8f9fa;
            padding: 25px;
            border-radius: var(--radius);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #ddd;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-widget h3 i {
            color: var(--primary);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--secondary);
        }
        .related-links ul {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #ddd;
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .related-links a {
            color: var(--dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        .related-links i {
            color: var(--gray);
            font-size: 0.9rem;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 15px 0;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .star {
            color: #ddd;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--warning);
        }
        .rating-info {
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 10px;
        }
        .interactive-section {
            background-color: white;
            border-radius: var(--radius);
            padding: 30px;
            margin: 50px 0;
            box-shadow: var(--shadow);
        }
        .interactive-section h2 {
            text-align: center;
            margin-bottom: 30px;
            color: var(--primary);
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--radius);
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 768px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }
        .btn {
            padding: 14px 30px;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            text-decoration: none;
        }
        .btn:hover {
            background-color: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .btn-accent {
            background-color: var(--accent);
        }
        .btn-accent:hover {
            background-color: #ff8533;
        }
        .btn-block {
            width: 100%;
        }
        .comments-list {
            margin-top: 40px;
        }
        .comment {
            background-color: #f8f9fa;
            border-radius: var(--radius);
            padding: 20px;
            margin-bottom: 20px;
            border-left: 4px solid var(--primary);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 15px;
            flex-wrap: wrap;
            gap: 10px;
        }
        .comment-author {
            font-weight: 700;
            color: var(--dark);
        }
        .comment-date {
            color: var(--gray);
            font-size: 0.9rem;
        }
        .comment-rating {
            color: var(--warning);
            font-size: 0.9rem;
        }
        .comment-body {
            line-height: 1.6;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
        }
        .footer-content {
            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;
            margin-bottom: 20px;
        }
        .footer-logo span {
            color: var(--secondary);
        }
        .footer-description {
            color: #ccc;
            line-height: 1.6;
            margin-bottom: 20px;
        }
        .social-links {
            display: flex;
            gap: 15px;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            border-radius: 50%;
            text-decoration: none;
            transition: var(--transition);
        }
        .social-links a:hover {
            background-color: var(--primary);
            transform: translateY(-3px);
        }
        .footer-links h4,
        friend-links h4 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: white;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-links h4::after,
        friend-links h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--accent);
        }
        .footer-links ul,
        friend-links ul {
            list-style: none;
        }
        .footer-links li,
        friend-links li {
            margin-bottom: 12px;
        }
        .footer-links a,
        friend-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover,
        friend-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .footer-links i,
        friend-links i {
            font-size: 0.8rem;
            color: var(--gray);
        }
        friend-links {
            display: block;
            margin-top: 20px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }
            h1 {
                font-size: 2.2rem;
            }
            .header-top {
                padding: 12px 0;
            }
            nav.desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
                align-items: center;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            h1 {
                font-size: 1.8rem;
            }
            .article-content h2 {
                font-size: 1.6rem;
            }
            .article-content h3 {
                font-size: 1.3rem;
            }
            .interactive-section {
                padding: 20px;
            }
            .btn {
                padding: 12px 20px;
            }
        }
        @media print {
            header, .sidebar, .interactive-section, footer, .breadcrumb {
                display: none;
            }
            body {
                font-size: 12pt;
                color: #000;
            }
            .article-content {
                width: 100%;
            }
            h1, h2, h3 {
                page-break-after: avoid;
            }
            p, li {
                page-break-inside: avoid;
            }
        }