:root {
            --primary-color: #1a365d;
            --secondary-color: #d4af37;
            --accent-color: #c53030;
            --text-color: #2d3748;
            --light-bg: #f7fafc;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--secondary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            font-size: 2rem;
        }
        .logo:hover {
            color: white;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        nav a:hover {
            color: var(--secondary-color);
        }
        nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        nav a:hover:after {
            width: 100%;
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 20px;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child):after {
            content: '/';
            margin-left: 0.5rem;
            color: #718096;
        }
        .breadcrumb a:hover {
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2d3748 100%);
            color: white;
            padding: 4rem 20px;
            text-align: center;
            margin-bottom: 2rem;
        }
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background: white;
            border-radius: 8px;
            overflow: hidden;
        }
        .content-section {
            padding: 2.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .content-section:last-child {
            border-bottom: none;
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
            margin-top: 2.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.5rem;
            color: #4a5568;
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #fffaf0;
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 4px 4px 0;
        }
        .term {
            font-weight: bold;
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease;
        }
        img:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #718096;
            margin-top: -1rem;
            margin-bottom: 2rem;
        }
        .search-box {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
            margin-bottom: 2rem;
        }
        .search-box h3 {
            margin-top: 0;
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: #2d3748;
        }
        .rating-system {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
            margin: 2rem 0;
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--secondary-color);
        }
        .comment-section {
            background: white;
            border-radius: 8px;
            padding: 2rem;
            border: 1px solid var(--border-color);
            margin-top: 3rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            margin: 1rem 0;
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .comment-form button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background: #2d3748;
        }
        aside {
            background: var(--light-bg);
            border-radius: 8px;
            padding: 2rem;
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
        }
        .sidebar-section:last-child {
            margin-bottom: 0;
        }
        .sidebar-section h3 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        .sidebar-section ul {
            list-style: none;
        }
        .sidebar-section li {
            margin-bottom: 0.75rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .sidebar-section li:before {
            content: '▶';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
            font-size: 0.8rem;
        }
        .sidebar-section a:hover {
            color: var(--accent-color);
        }
        .footer-links {
            background: var(--primary-color);
            padding: 3rem 20px;
            margin-top: 3rem;
        }
        .web-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            padding: 0.75rem 1.5rem;
            margin: 0.5rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        footer {
            background: #1a202c;
            color: white;
            padding: 2rem 20px;
            text-align: center;
        }
        .copyright {
            margin-top: 1rem;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            aside {
                position: static;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .hamburger {
                display: block;
            }
            .hero {
                padding: 3rem 20px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .content-section {
                padding: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .web-link {
                display: block;
                margin: 0.5rem 0;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content-section {
            animation: fadeIn 0.6s ease forwards;
        }
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .bold { font-weight: 700; }
        .emoji { font-size: 1.2em; }