:root {
            --primary-color: #1a365d;
            --secondary-color: #c53030;
            --accent-color: #f6ad55;
            --light-color: #f7fafc;
            --dark-color: #2d3748;
            --text-color: #4a5568;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --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: 1.7;
            color: var(--text-color);
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        .header {
            background: linear-gradient(135deg, var(--primary-color), #2a4365);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .my-logo:hover {
            color: var(--accent-color);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--accent-color);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent-color);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 300px;
            height: 100vh;
            background-color: var(--primary-color);
            padding: 2rem;
            transition: var(--transition);
            z-index: 1100;
            box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
        }
        .mobile-nav.active {
            right: 0;
        }
        .mobile-nav-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
        }
        .close-menu {
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav-links {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .mobile-nav-link {
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            padding: 0.75rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .mobile-nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--accent-color);
        }
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1050;
            display: none;
        }
        .overlay.active {
            display: block;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 1.5rem;
        }
        .breadcrumb-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb-item {
            display: flex;
            align-items: center;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
        }
        .breadcrumb-link {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb-link:hover {
            text-decoration: underline;
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem 3rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 2.5rem;
            overflow: hidden;
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 1.5rem;
        }
        .article-title {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            color: #718096;
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
        }
        .last-updated {
            background-color: #e6fffa;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-img-container {
            width: 100%;
            margin: 2rem 0;
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        .article-img {
            width: 100%;
            height: auto;
            display: block;
            transition: var(--transition);
        }
        .article-img:hover {
            transform: scale(1.02);
        }
        .article-content h2 {
            color: var(--primary-color);
            font-size: 1.8rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .article-content h3 {
            color: var(--dark-color);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        .article-content h4 {
            color: var(--text-color);
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .article-content em {
            color: var(--secondary-color);
            font-style: italic;
        }
        .article-content ul, .article-content ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .highlight-box {
            background-color: #f0fff4;
            border-left: 5px solid #38a169;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .quote {
            font-style: italic;
            color: var(--dark-color);
            border-left: 4px solid var(--accent-color);
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        .internal-link {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--secondary-color);
            transition: var(--transition);
        }
        .internal-link:hover {
            color: #9b2c2c;
            border-bottom-style: solid;
        }
        .search-section {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            margin-bottom: 2rem;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #cbd5e0;
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--primary-color);
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #2c5282;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
        }
        .widget-title {
            color: var(--primary-color);
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .related-links {
            list-style: none;
        }
        .related-link-item {
            margin-bottom: 0.8rem;
        }
        .related-link {
            color: var(--text-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 0;
            transition: var(--transition);
        }
        .related-link:hover {
            color: var(--secondary-color);
            padding-left: 0.5rem;
        }
        .related-link i {
            color: var(--accent-color);
            font-size: 0.9rem;
        }
        .user-interaction {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            margin-top: 2rem;
        }
        .rating-section {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
            margin-bottom: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
        }
        .star:hover,
        .star.active {
            color: #f6ad55;
        }
        .rating-form {
            width: 100%;
            max-width: 500px;
        }
        .rating-form label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-color);
        }
        .rating-form select,
        .rating-form textarea {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #cbd5e0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        .rating-form select:focus,
        .rating-form textarea:focus {
            border-color: var(--primary-color);
            outline: none;
        }
        .rating-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            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);
        }
        .submit-button:hover {
            background-color: #2c5282;
            transform: translateY(-2px);
        }
        .comments-section {
            margin-top: 2rem;
        }
        .comment {
            background-color: #f7fafc;
            border-radius: var(--border-radius);
            padding: 1.2rem;
            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;
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary-color);
        }
        .comment-date {
            color: #718096;
        }
        .footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .footer-heading {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: var(--accent-color);
        }
        .footer-links {
            list-style: none;
        }
        .footer-link-item {
            margin-bottom: 0.8rem;
        }
        .footer-link {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: white;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            padding: 1rem;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
        }
        friend-link a {
            color: var(--accent-color);
            text-decoration: none;
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .text-center {
            text-align: center;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .py-1 {
            padding-top: 1rem;
            padding-bottom: 1rem;
        }
        .px-1 {
            padding-left: 1rem;
            padding-right: 1rem;
        }
        .highlight {
            background-color: #fffaf0;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }