:root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1.5rem;
            color: var(--secondary);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            border-left: 6px solid var(--accent);
            padding-left: 1.5rem;
            margin-top: 2rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 3rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid #e9ecef;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-top: 2.5rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        strong {
            font-weight: 700;
            color: var(--secondary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: #fff;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 0;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
        }
        .logo i {
            color: var(--accent);
            margin-right: 10px;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 2rem;
        }
        nav ul li a {
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        nav ul li a:hover::after {
            width: 100%;
        }
        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent);
            transition: var(--transition);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary);
        }
        .breadcrumb {
            background-color: #f8f9fa;
            padding: 1.2rem 0;
            margin-bottom: 2.5rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
        }
        .breadcrumb li {
            margin-right: 0.75rem;
            font-size: 0.95rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.75rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: #fff;
            border-radius: var(--radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        .intro {
            font-size: 1.3rem;
            color: var(--secondary);
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 2rem;
            border-radius: var(--radius);
            margin-bottom: 3rem;
            border-left: 5px solid var(--primary);
        }
        .highlight-box {
            background-color: #e7f1ff;
            border: 1px solid #b6d4fe;
            border-radius: var(--radius);
            padding: 2rem;
            margin: 2.5rem 0;
        }
        .highlight-box h4 {
            color: #004085;
            margin-top: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 2rem 0;
            display: block;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1rem;
            margin-bottom: 2.5rem;
            font-size: 0.95rem;
        }
        blockquote {
            border-left: 5px solid var(--accent);
            padding-left: 2rem;
            margin: 2.5rem 0;
            font-style: italic;
            color: var(--dark);
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 2rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        aside {
            background-color: #fff;
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid #e9ecef;
        }
        .search-form {
            display: flex;
            margin-bottom: 2rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.85rem 1rem;
            border: 2px solid #dee2e6;
            border-right: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary);
            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-color: var(--secondary);
        }
        .related-links ul {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dotted #dee2e6;
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: #ffc107;
            margin: 1rem 0;
        }
        .stars i {
            cursor: pointer;
            margin: 0 2px;
        }
        .comments-section {
            margin-top: 4rem;
            padding-top: 3rem;
            border-top: 2px solid #e9ecef;
        }
        .comment-form {
            background-color: #f8f9fa;
            padding: 2.5rem;
            border-radius: var(--radius);
            margin-bottom: 3rem;
        }
        .form-group {
            margin-bottom: 1.8rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #dee2e6;
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        button[type="submit"] {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        button[type="submit"]:hover {
            background-color: var(--secondary);
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark);
            color: #f8f9fa;
            padding: 4rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1.5rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 0.75rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #adb5bd;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 2rem;
            border-radius: var(--radius);
            margin-bottom: 2rem;
        }
        friend-link h4 {
            color: white;
            margin-bottom: 1.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #495057;
            color: #adb5bd;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .header-content {
                flex-wrap: wrap;
            }
            nav {
                width: 100%;
                order: 3;
                margin-top: 1.5rem;
                display: none;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
            }
            nav ul li {
                margin: 0 0 1rem 0;
            }
            .hamburger {
                display: block;
            }
            article {
                padding: 1.8rem;
            }
            .intro {
                padding: 1.5rem;
            }
            .main-content {
                gap: 2rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article, aside {
            animation: fadeIn 0.6s ease-out;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .text-center {
            text-align: center;
        }
        .mb-4 {
            margin-bottom: 2.5rem;
        }