:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --text-light: #7f8c8d;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--box-shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            color: var(--secondary-color);
        }
        .my-logo:hover {
            color: var(--light-color);
        }
        .desktop-nav {
            display: flex;
            gap: 30px;
        }
        .desktop-nav a {
            color: white;
            font-weight: 500;
            padding: 5px 0;
            position: relative;
        }
        .desktop-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .desktop-nav a:hover:after {
            width: 100%;
        }
        .mobile-menu-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--dark-color);
            padding: 20px;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--box-shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            font-weight: 500;
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 12px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
        }
        .breadcrumb span {
            color: var(--text-color);
            font-weight: 500;
        }
        main {
            padding: 40px 0;
            background-color: white;
        }
        .article-header {
            margin-bottom: 40px;
            border-bottom: 1px solid #eee;
            padding-bottom: 30px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .featured-image {
            width: 100%;
            border-radius: var(--border-radius);
            overflow: hidden;
            margin: 30px 0;
            box-shadow: var(--box-shadow);
        }
        .featured-image figcaption {
            padding: 10px 15px;
            background-color: #f5f5f5;
            font-style: italic;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .article-content {
            font-size: 1.1rem;
            max-width: 900px;
            margin: 0 auto;
        }
        .article-content > * {
            margin-bottom: 25px;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-top: 50px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-color);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-top: 40px;
            margin-bottom: 15px;
        }
        h4 {
            font-size: 1.5rem;
            color: var(--dark-color);
            margin-top: 30px;
            margin-bottom: 15px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        em {
            color: var(--accent-color);
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid var(--secondary-color);
            padding-left: 20px;
            margin: 30px 0;
            font-style: italic;
            color: var(--text-light);
            background-color: #f8f9fa;
            padding: 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        ul.content-list {
            list-style-type: disc;
            margin-left: 30px;
            margin-bottom: 25px;
        }
        ul.content-list li {
            margin-bottom: 10px;
        }
        .interactive-section {
            background-color: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 30px;
            margin: 50px 0;
            border: 1px solid #e9ecef;
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 20px;
        }
        .form-group {
            flex: 1 1 300px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--primary-color);
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        button, .btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }
        button:hover, .btn:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #f1c40f;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .footer-links a {
            color: #bdc3c7;
            display: block;
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 20px 0;
        }
        friend-link a {
            color: var(--secondary-color);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 12px 15px;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .article-content {
                font-size: 1rem;
            }
            .interactive-section {
                padding: 20px;
            }
            .form-group {
                flex: 1 1 100%;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .article-content > * {
            animation: fadeIn 0.6s ease forwards;
            opacity: 0;
        }
        .article-content > *:nth-child(1) { animation-delay: 0.1s; }
        .article-content > *:nth-child(2) { animation-delay: 0.2s; }
        .article-content > *:nth-child(3) { animation-delay: 0.3s; }
        .article-content > *:nth-child(4) { animation-delay: 0.4s; }
        .article-content > *:nth-child(5) { animation-delay: 0.5s; }
        .article-content > *:nth-child(6) { animation-delay: 0.6s; }
        .article-content > *:nth-child(7) { animation-delay: 0.7s; }
        .article-content > *:nth-child(8) { animation-delay: 0.8s; }
        .article-content > *:nth-child(9) { animation-delay: 0.9s; }
        .article-content > *:nth-child(10) { animation-delay: 1.0s; }