:root {
            --primary-color: #E67E22;
            --secondary-color: #2C3E50;
            --accent-color: #3498DB;
            --light-color: #ECF0F1;
            --dark-color: #1A2530;
            --text-color: #333;
            --text-light: #7F8C8D;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            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(--text-color);
            background-color: #f9f9f9;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--secondary-color);
            color: white;
            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 {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--primary-color);
        }
        .logo:hover {
            color: var(--light-color);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            color: var(--primary-color);
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--dark-color);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            display: block;
            padding: 0.8rem 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-weight: 600;
        }
        .mobile-nav a:hover {
            color: var(--primary-color);
            padding-left: 10px;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--accent-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 2rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 2px solid var(--light-color);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--secondary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
        }
        .article-meta {
            color: var(--text-light);
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .article-content {
            font-size: 1.1rem;
            max-width: 800px;
            margin: 0 auto;
        }
        .article-content p {
            margin-bottom: 1.8rem;
            text-align: justify;
        }
        .article-content strong {
            color: var(--secondary-color);
            font-weight: 700;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fdfcfb 0%, #f5f7fa 100%);
            border-left: 5px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            box-shadow: var(--shadow);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        .comparison-table th, .comparison-table td {
            padding: 1rem;
            text-align: left;
            border: 1px solid #ddd;
        }
        .comparison-table th {
            background-color: var(--secondary-color);
            color: white;
            font-weight: 600;
        }
        .comparison-table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        .comparison-table tr:hover {
            background-color: #e9f7fe;
        }
        .interactive-section {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .interactive-section h2 {
            text-align: center;
            border: none;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--secondary-color);
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background-color: #d35400;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(230, 126, 34, 0.4);
        }
        .btn-secondary {
            background-color: var(--accent-color);
        }
        .btn-secondary:hover {
            background-color: #2980b9;
            box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #FFD700;
        }
        .search-box {
            display: flex;
            margin-bottom: 2rem;
        }
        .search-box .form-control {
            border-top-right-radius: 0;
            border-bottom-right-radius: 0;
        }
        .search-box .btn {
            border-top-left-radius: 0;
            border-bottom-left-radius: 0;
        }
        .comments-section {
            margin-top: 3rem;
        }
        .comment {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 1.5rem;
            border-left: 4px solid var(--accent-color);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .comment-author {
            font-weight: 600;
            color: var(--secondary-color);
        }
        .longtail-links {
            background-color: var(--light-color);
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .web-link {
            display: inline-block;
            margin: 0.5rem 1rem;
        }
        .web-link a {
            color: var(--secondary-color);
            text-decoration: none;
            padding: 0.5rem 1rem;
            background-color: white;
            border-radius: 50px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            font-weight: 500;
            display: inline-block;
        }
        .web-link a:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 2rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
            display: block;
        }
        .footer-logo span {
            color: var(--primary-color);
        }
        .footer-about p {
            color: #bbb;
            margin-bottom: 1.5rem;
        }
        .footer-links h3, .footer-social h3 {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: white;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        .social-icons {
            display: flex;
            gap: 1rem;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 50%;
            color: white;
            text-decoration: none;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #bbb;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-menu-btn { display: block; }
            .header-container { padding: 0 15px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .article-content { font-size: 1rem; }
            .stats-grid { grid-template-columns: 1fr; }
            .comparison-table { font-size: 0.9rem; }
            .interactive-section { padding: 1.5rem; }
            .footer-container { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 1.8rem; }
            .article-meta { flex-direction: column; gap: 0.5rem; align-items: center; }
            .web-link { margin: 0.5rem; }
            .web-link a { font-size: 0.9rem; padding: 0.4rem 0.8rem; }
        }