:root {
            --primary-color: #dc2626;
            --secondary-color: #1e40af;
            --accent-color: #f59e0b;
            --dark-color: #1f2937;
            --light-color: #f8fafc;
            --text-color: #334155;
            --gray-light: #e2e8f0;
            --gray-medium: #94a3b8;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            color: var(--dark-color);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
        }
        h2 {
            font-size: 2.2rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: var(--secondary-color);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .flex {
            display: flex;
        }
        .grid {
            display: grid;
        }
        .btn {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: #b91c1c;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .card {
            background: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--gray-light);
        }
        .site-header {
            background: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-color);
            letter-spacing: -1px;
        }
        .logo span {
            color: var(--secondary-color);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            font-weight: 600;
            font-size: 1.1rem;
            position: relative;
            padding: 0.5rem 0;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary-color);
            transition: width 0.3s ease;
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark-color);
        }
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: white;
            box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
            transition: right 0.4s ease;
            z-index: 1001;
            padding: 2rem;
            overflow-y: auto;
        }
        .mobile-nav.active {
            right: 0;
        }
        .mobile-nav ul {
            list-style: none;
            margin-top: 3rem;
        }
        .mobile-nav li {
            margin-bottom: 1.5rem;
        }
        .mobile-nav a {
            font-size: 1.3rem;
            font-weight: 600;
            display: block;
            padding: 0.5rem 0;
            border-bottom: 1px solid var(--gray-light);
        }
        .close-menu {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark-color);
        }
        .overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1000;
        }
        .overlay.active {
            display: block;
        }
        .breadcrumb {
            background: var(--light-color);
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--gray-light);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: var(--gray-medium);
        }
        .breadcrumb a {
            color: var(--gray-medium);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .main-content {
            padding: 2.5rem 0;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
        }
        .article-header {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--gray-light);
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--gray-medium);
            margin-top: 1rem;
            font-size: 0.95rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .featured-image {
            width: 100%;
            border-radius: var(--radius);
            overflow: hidden;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.02);
        }
        .article-section {
            margin-bottom: 3rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
            border-left: 5px solid var(--accent-color);
            padding: 1.8rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 2rem 0;
        }
        .tip {
            background: #e0f2fe;
            border-left: 5px solid var(--secondary-color);
            padding: 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 1.5rem 0;
        }
        .download-cta {
            text-align: center;
            padding: 3rem;
            background: linear-gradient(135deg, var(--secondary-color) 0%, #1e3a8a 100%);
            color: white;
            border-radius: var(--radius);
            margin: 3rem 0;
        }
        .download-cta h2 {
            color: white;
            border-bottom: none;
        }
        .download-cta .btn {
            background: white;
            color: var(--secondary-color);
            font-size: 1.2rem;
            padding: 1rem 2.5rem;
            margin-top: 1.5rem;
        }
        .download-cta .btn:hover {
            background: var(--accent-color);
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.5rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gray-light);
        }
        .popular-list {
            list-style: none;
        }
        .popular-list li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--gray-light);
        }
        .popular-list a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            font-weight: 500;
        }
        .popular-list i {
            color: var(--primary-color);
        }
        .search-form {
            display: flex;
            margin-bottom: 2rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid var(--gray-light);
            border-right: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: #b91c1c;
        }
        .interaction-section {
            margin: 4rem 0;
            padding-top: 2rem;
            border-top: 2px solid var(--gray-light);
        }
        .rating-widget {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .stars {
            display: flex;
            gap: 0.3rem;
        }
        .stars i {
            color: var(--gray-light);
            cursor: pointer;
            font-size: 1.5rem;
            transition: color 0.2s ease;
        }
        .stars i:hover,
        .stars i.active {
            color: var(--accent-color);
        }
        .comment-form, .rating-form {
            background: var(--light-color);
            padding: 2rem;
            border-radius: var(--radius);
            margin-bottom: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.9rem;
            border: 2px solid var(--gray-light);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--secondary-color);
        }
        .footer-links {
            background: var(--dark-color);
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .web-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.05);
            color: var(--gray-light);
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            transform: translateY(-3px);
        }
        .links-container {
            text-align: center;
        }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 3rem 0 2rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-nav h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
        }
        .footer-nav ul {
            list-style: none;
        }
        .footer-nav li {
            margin-bottom: 0.8rem;
        }
        .footer-nav a {
            color: #94a3b8;
        }
        .footer-nav a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .header-container {
                padding: 1rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
            .download-cta {
                padding: 2rem 1rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 1rem;
            }
            .footer-container {
                grid-template-columns: 1fr;
            }
        }