:root {
            --primary-color: #2c3e50;
            --secondary-color: #e74c3c;
            --accent-color: #f39c12;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --text-light: #7f8c8d;
            --border-color: #ddd;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --border-radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text-color);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--primary-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 a {
            color: white;
            text-decoration: none;
            font-size: 2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 1px;
        }
        .logo-icon {
            color: var(--accent-color);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: var(--accent-color);
            color: var(--primary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
            color: var(--secondary-color);
        }
        .search-section {
            background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
            padding: 2rem 0;
            text-align: center;
            color: white;
        }
        .search-box {
            max-width: 600px;
            margin: 0 auto;
        }
        .search-box h2 {
            margin-bottom: 1rem;
            font-size: 1.8rem;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #1a252f;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 1.5rem;
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .article-meta {
            display: flex;
            gap: 2rem;
            color: var(--text-light);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-body {
            font-size: 1.1rem;
        }
        .article-body p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-body h2 {
            color: var(--primary-color);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
            font-size: 1.8rem;
        }
        .article-body h3 {
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
            font-size: 1.5rem;
        }
        .article-body ul, .article-body ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        .article-body li {
            margin-bottom: 0.5rem;
        }
        .highlight-box {
            background-color: #f8f9fa;
            border-left: 5px solid var(--accent-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight-box h4 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
            font-size: 1.3rem;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
            display: block;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -1rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .quote {
            font-style: italic;
            font-size: 1.2rem;
            color: var(--primary-color);
            border-left: 4px solid var(--secondary-color);
            padding-left: 1.5rem;
            margin: 2.5rem 0;
            line-height: 1.6;
        }
        .term {
            font-weight: bold;
            color: var(--secondary-color);
        }
        .strategy-tip {
            background: linear-gradient(to right, #e3f2fd, #fce4ec);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            position: relative;
            border: 1px dashed var(--accent-color);
        }
        .strategy-tip::before {
            content: "💡";
            position: absolute;
            left: -15px;
            top: -15px;
            background: white;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
            font-size: 1.3rem;
        }
        .table-of-contents ul {
            list-style: none;
            margin-left: 0;
        }
        .table-of-contents li {
            margin-bottom: 0.8rem;
            border-left: 3px solid transparent;
            transition: var(--transition);
            padding-left: 0.5rem;
        }
        .table-of-contents li:hover {
            border-left-color: var(--secondary-color);
            padding-left: 1rem;
        }
        .table-of-contents a {
            color: var(--text-color);
            text-decoration: none;
            display: block;
            transition: var(--transition);
        }
        .table-of-contents a:hover {
            color: var(--secondary-color);
        }
        .popular-topics ul {
            list-style: none;
        }
        .popular-topics li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .popular-topics a {
            color: var(--text-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .popular-topics a:hover {
            color: var(--secondary-color);
        }
        .popular-topics i {
            color: var(--accent-color);
        }
        .user-interaction {
            margin-top: 3rem;
            background: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .user-interaction h2 {
            color: var(--primary-color);
            margin-bottom: 2rem;
            font-size: 1.8rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
        }
        .rating-section {
            text-align: center;
            margin-bottom: 3rem;
        }
        .stars {
            font-size: 2.5rem;
            color: #ddd;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars .star {
            transition: var(--transition);
            display: inline-block;
            padding: 0 5px;
        }
        .stars .star:hover,
        .stars .star.active {
            color: var(--accent-color);
            transform: scale(1.2);
        }
        .rating-form,
        .comment-form {
            max-width: 800px;
            margin: 0 auto;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--primary-color);
        }
        .form-control {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--border-color);
            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(243, 156, 18, 0.2);
        }
        .submit-button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            font-size: 1.1rem;
            border-radius: 50px;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .submit-button:hover {
            background-color: #c0392b;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .comments-section {
            margin-top: 3rem;
        }
        .comment {
            border-bottom: 1px solid var(--border-color);
            padding: 1.5rem 0;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary-color);
        }
        .comment-date {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .comment-rating {
            color: var(--accent-color);
            margin: 0.5rem 0;
        }
        .footer-links {
            background-color: var(--primary-color);
            padding: 3rem 0;
            color: white;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.1);
            padding: 1.2rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-5px);
        }
        .web-link a {
            color: white;
            text-decoration: none;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .web-link i {
            color: var(--accent-color);
        }
        .site-footer {
            background-color: #1a252f;
            color: white;
            text-align: center;
            padding: 2rem 0;
            font-size: 0.95rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
        }
        .footer-links-menu {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
            justify-content: center;
            margin-bottom: 1rem;
        }
        .footer-links-menu a {
            color: #bdc3c7;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links-menu a:hover {
            color: var(--accent-color);
        }
        .copyright {
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--primary-color);
                flex-direction: column;
                padding: 1rem;
                box-shadow: var(--shadow);
                border-top: 2px solid var(--accent-color);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .article-body h3 {
                font-size: 1.3rem;
            }
            .stars {
                font-size: 2rem;
            }
            .footer-links-menu {
                flex-direction: column;
                gap: 1rem;
            }
        }
        @media (max-width: 480px) {
            .article-content,
            .user-interaction {
                padding: 1.5rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: var(--border-radius);
            }
            .search-input,
            .search-button {
                width: 100%;
                border-radius: 0;
            }
            .search-input {
                border-radius: var(--border-radius) var(--border-radius) 0 0;
            }
            .search-button {
                border-radius: 0 0 var(--border-radius) var(--border-radius);
                padding: 1rem;
            }
        }
        @media print {
            .site-header,
            .search-section,
            .sidebar,
            .user-interaction,
            .footer-links,
            .site-footer,
            .breadcrumb {
                display: none;
            }
            .main-content {
                grid-template-columns: 1fr;
                padding: 0;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
            body {
                font-size: 12pt;
                line-height: 1.5;
                color: black;
                background: white;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }