:root {
            --primary: #7B1FA2;
            --primary-dark: #4A148C;
            --secondary: #FF9800;
            --accent: #00BCD4;
            --light: #F5F5F5;
            --dark: #212121;
            --gray: #757575;
            --success: #4CAF50;
            --warning: #FFC107;
            --danger: #F44336;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 12px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #f8f9ff 0%, #f0e6ff 100%);
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 3px solid var(--secondary);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--primary-dark);
            transform: scale(1.02);
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(45deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .desktop-nav a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 16px;
            border-radius: 30px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .desktop-nav a:hover,
        .desktop-nav a.active {
            background: var(--primary);
            color: white;
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary);
            cursor: pointer;
            padding: 5px;
        }
        .mobile-nav {
            position: fixed;
            top: 80px;
            left: 0;
            width: 100%;
            background: white;
            box-shadow: var(--shadow);
            padding: 20px;
            transform: translateY(-100%);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .mobile-nav ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            padding: 15px;
            border-radius: var(--border-radius);
            display: block;
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background: #f0e6ff;
            padding-left: 25px;
        }
        .breadcrumb {
            background: #f8f4ff;
            padding: 15px 0;
            border-bottom: 1px solid #e0d6f0;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        .breadcrumb i {
            color: var(--gray);
            font-size: 0.8rem;
        }
        main {
            padding: 40px 0;
            min-height: 80vh;
        }
        .article-header {
            text-align: center;
            margin-bottom: 50px;
            padding: 30px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            font-size: 0.95rem;
            opacity: 0.9;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-content h2 {
            color: var(--primary-dark);
            margin: 40px 0 20px;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--secondary);
            font-size: 2rem;
        }
        .article-content h3 {
            color: var(--primary);
            margin: 30px 0 15px;
            font-size: 1.6rem;
        }
        .article-content p {
            margin-bottom: 25px;
            font-size: 1.1rem;
        }
        .article-content ul, .article-content ol {
            margin: 20px 0 25px 30px;
        }
        .article-content li {
            margin-bottom: 10px;
        }
        .highlight-box {
            background: #f0f7ff;
            border-left: 5px solid var(--accent);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip {
            background: #fff8e1;
            border-left: 5px solid var(--warning);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .warning {
            background: #ffebee;
            border-left: 5px solid var(--danger);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 30px 0;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.2);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }
        .stat-card {
            background: linear-gradient(135deg, #7B1FA2, #4A148C);
            color: white;
            padding: 25px;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: var(--shadow);
        }
        .stat-card i {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--secondary);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            margin: 10px 0;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 40px 0;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        .comparison-table th {
            background: var(--primary);
            color: white;
            padding: 20px;
            text-align: left;
        }
        .comparison-table td {
            padding: 18px 20px;
            border-bottom: 1px solid #eee;
        }
        .comparison-table tr:nth-child(even) {
            background: #f9f9f9;
        }
        .comparison-table tr:hover {
            background: #f0e6ff;
        }
        .rating {
            color: var(--warning);
            font-size: 1.2rem;
            margin: 5px 0;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--primary-dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
        }
        .search-box {
            display: flex;
            margin-bottom: 20px;
        }
        .search-box input {
            flex: 1;
            padding: 15px;
            border: 2px solid #e0d6f0;
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-box input:focus {
            border-color: var(--primary);
        }
        .search-box button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--primary-dark);
        }
        .toc ul {
            list-style: none;
            margin-left: 10px;
        }
        .toc li {
            margin-bottom: 12px;
        }
        .toc a {
            color: var(--dark);
            text-decoration: none;
            display: block;
            padding: 10px 15px;
            border-radius: 8px;
            transition: var(--transition);
            border-left: 3px solid transparent;
        }
        .toc a:hover {
            background: #f0e6ff;
            border-left-color: var(--primary);
            padding-left: 20px;
        }
        .toc .active {
            background: #f0e6ff;
            border-left-color: var(--primary);
            font-weight: 600;
            color: var(--primary);
        }
        .interactive-section {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-top: 50px;
        }
        .interactive-section h2 {
            color: var(--primary-dark);
            margin-bottom: 30px;
            text-align: center;
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 40px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 15px;
            border: 2px solid #e0d6f0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(123, 31, 162, 0.1);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 2rem;
            margin: 10px 0;
        }
        .star-rating i {
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: var(--warning);
        }
        .submit-btn {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
            border: none;
            padding: 18px 30px;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(123, 31, 162, 0.3);
        }
        .comments-list {
            display: flex;
            flex-direction: column;
            gap: 25px;
            margin-top: 40px;
        }
        .comment {
            background: #f9f9f9;
            padding: 25px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 15px;
            flex-wrap: wrap;
        }
        .comment-author {
            font-weight: 600;
            color: var(--primary);
        }
        .comment-date {
            color: var(--gray);
            font-size: 0.9rem;
        }
        .internal-links {
            background: #f8f4ff;
            padding: 50px 0;
            border-top: 1px solid #e0d6f0;
            border-bottom: 1px solid #e0d6f0;
        }
        .internal-links h2 {
            text-align: center;
            color: var(--primary-dark);
            margin-bottom: 30px;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .web-link {
            background: white;
            padding: 20px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .web-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--primary-dark);
            gap: 15px;
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 50px 0 30px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            margin-bottom: 20px;
            color: white;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 15px;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .content-grid {
                gap: 30px;
            }
            .article-content {
                padding: 25px;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .article-content h3 {
                font-size: 1.4rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .comparison-table {
                display: block;
                overflow-x: auto;
            }
            .interactive-section {
                padding: 25px;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .logo {
                font-size: 1.8rem;
            }
            .article-header {
                padding: 20px;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-bold {
            font-weight: 700;
            color: var(--primary-dark);
        }
        .text-highlight {
            background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%);
            padding: 2px 6px;
            border-radius: 4px;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 5px;
        }
        .divider {
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border: none;
            margin: 40px 0;
            border-radius: 3px;
        }
        .btn {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 12px 25px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(123, 31, 162, 0.3);
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #E68900;
        }