:root {
            --primary-color: #2a4365;
            --secondary-color: #c53030;
            --accent-color: #d69e2e;
            --light-bg: #f7fafc;
            --dark-text: #2d3748;
            --light-text: #718096;
            --shadow: 0 4px 6px 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: 1.6;
            color: var(--dark-text);
            background-color: #fff;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .my-logo span {
            background: linear-gradient(90deg, var(--accent-color), #fff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .desktop-nav a {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--border-radius);
        }
        .desktop-nav a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--accent-color);
        }
        .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(--primary-color);
            padding: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav a {
            color: white;
            display: block;
            padding: 12px;
            border-radius: var(--border-radius);
            border-left: 3px solid transparent;
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            background-color: rgba(255, 255, 255, 0.05);
            border-left-color: var(--accent-color);
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 12px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .breadcrumb a {
            color: var(--light-text);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb span {
            color: var(--light-text);
            margin: 0 8px;
        }
        main {
            padding: 40px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #e2e8f0;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--secondary-color);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--dark-text);
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary-color);
            background-color: var(--light-bg);
            padding: 20px;
            border-left: 4px solid var(--accent-color);
            border-radius: var(--border-radius);
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fff9db;
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent-color);
            margin: 25px 0;
        }
        .highlight strong {
            color: var(--secondary-color);
        }
        .figure-container {
            margin: 30px 0;
            text-align: center;
        }
        .article-img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .article-img:hover {
            transform: scale(1.02);
        }
        .img-caption {
            font-style: italic;
            color: var(--light-text);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        ul, ol {
            margin-left: 30px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 10px;
        }
        blockquote {
            font-style: italic;
            color: var(--light-text);
            border-left: 4px solid var(--primary-color);
            padding-left: 20px;
            margin: 25px 0;
        }
        .keyword-link {
            background-color: #ebf8ff;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .keyword-link:hover {
            background-color: #bee3f8;
        }
        .interactive-section {
            background-color: var(--light-bg);
            padding: 30px;
            border-radius: var(--border-radius);
            margin: 40px 0;
            border: 1px solid #e2e8f0;
        }
        .interactive-title {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 25px;
            color: var(--primary-color);
        }
        .interactive-title i {
            color: var(--secondary-color);
        }
        .search-box, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 500px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        label {
            font-weight: 600;
            color: var(--dark-text);
        }
        input, textarea, select {
            padding: 12px 15px;
            border: 1px solid #cbd5e0;
            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(--primary-color);
            box-shadow: 0 0 0 3px rgba(42, 67, 101, 0.1);
        }
        button, .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        button:hover, .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .rating-stars i {
            color: #e2e8f0;
            cursor: pointer;
            font-size: 1.8rem;
            transition: var(--transition);
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f6ad55;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent-color);
        }
        .related-links {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px dashed #e2e8f0;
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--dark-text);
        }
        .related-links a:hover {
            color: var(--secondary-color);
        }
        .related-links i {
            color: var(--accent-color);
        }
        .update-info {
            background-color: #f0fff4;
            padding: 15px;
            border-radius: var(--border-radius);
            border-left: 4px solid #38a169;
        }
        .update-info strong {
            color: #276749;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 50px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: white;
        }
        .footer-links h4 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 20px;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #cbd5e0;
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 15px;
            border-radius: var(--border-radius);
            margin-bottom: 10px;
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #cbd5e0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-top {
                padding: 12px 0;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            .article-content {
                padding: 20px;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }