:root {
            --primary-color: #1a237e;
            --secondary-color: #ff6f00;
            --accent-color: #4fc3f7;
            --text-dark: #212121;
            --text-light: #757575;
            --background-light: #f5f5f5;
            --border-color: #e0e0e0;
            --wiki-blue: #3366cc;
            --success-color: #4caf50;
            --warning-color: #ff9800;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2rem;
            --spacing-xl: 3rem;
            --border-radius: 4px;
            --box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: #fff;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--wiki-blue);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        button, .btn {
            cursor: pointer;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: all 0.3s ease;
            min-height: 44px;
            min-width: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        .btn-primary:hover {
            background-color: #283593;
            transform: translateY(-2px);
            text-decoration: none;
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            color: white;
        }
        .btn-secondary:hover {
            background-color: #ff8f00;
            transform: translateY(-2px);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .lazy-img {
            opacity: 0;
            transition: opacity 0.5s ease;
        }
        .lazy-img.loaded {
            opacity: 1;
        }
        .site-header {
            background-color: white;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--box-shadow);
        }
        .header-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo a:hover {
            color: var(--secondary-color);
            text-decoration: none;
        }
        .main-nav {
            display: flex;
            gap: var(--spacing-md);
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .nav-link {
            padding: var(--spacing-sm);
            font-weight: 500;
            white-space: nowrap;
        }
        .nav-link:hover {
            background-color: var(--background-light);
            border-radius: var(--border-radius);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--primary-color);
            min-width: auto;
        }
        .search-form {
            display: flex;
            max-width: 300px;
            width: 100%;
        }
        .search-input {
            flex: 1;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-btn {
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            padding: 0.75rem 1rem;
            background-color: var(--primary-color);
            color: white;
        }
        .main-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: var(--spacing-lg) var(--spacing-md);
            flex: 1;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-xl);
        }
        .content-area {
            max-width: 100%;
            overflow-wrap: break-word;
        }
        .sidebar {
            border-left: 1px solid var(--border-color);
            padding-left: var(--spacing-lg);
        }
        h1 {
            font-size: 2.5rem;
            margin-bottom: var(--spacing-lg);
            color: var(--primary-color);
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: var(--spacing-sm);
        }
        h2 {
            font-size: 1.8rem;
            margin: var(--spacing-xl) 0 var(--spacing-md);
            color: var(--text-dark);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            margin: var(--spacing-lg) 0 var(--spacing-sm);
            color: var(--text-dark);
        }
        h4 {
            font-size: 1.2rem;
            margin: var(--spacing-md) 0 var(--spacing-xs);
            color: var(--text-light);
        }
        p, li {
            margin-bottom: var(--spacing-sm);
            line-height: 1.7;
        }
        ul, ol {
            margin-bottom: var(--spacing-md);
            padding-left: var(--spacing-lg);
        }
        blockquote {
            border-left: 4px solid var(--accent-color);
            padding-left: var(--spacing-md);
            margin: var(--spacing-md) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .highlight {
            background-color: #fff9c4;
            padding: 2px 4px;
            border-radius: 2px;
            font-weight: 500;
        }
        .info-card {
            background-color: var(--background-light);
            border-radius: var(--border-radius);
            padding: var(--spacing-md);
            margin-bottom: var(--spacing-md);
            border-left: 4px solid var(--wiki-blue);
            box-shadow: var(--box-shadow);
        }
        .table-container {
            overflow-x: auto;
            margin: var(--spacing-md) 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: var(--spacing-md);
        }
        th, td {
            padding: 0.75rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background-color: var(--background-light);
            font-weight: 600;
        }
        tr:hover {
            background-color: rgba(0,0,0,0.02);
        }
        .download-box {
            background: linear-gradient(135deg, var(--primary-color), #3949ab);
            color: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            text-align: center;
            margin: var(--spacing-lg) 0;
        }
        .download-box h3 {
            color: white;
            margin-top: 0;
        }
        .social-share {
            display: flex;
            gap: var(--spacing-sm);
            margin: var(--spacing-lg) 0;
            flex-wrap: wrap;
        }
        .social-btn {
            border-radius: 50%;
            width: 44px;
            height: 44px;
            padding: 0;
            justify-content: center;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 99;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            padding: 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            display: none;
        }
        .back-to-top.show {
            display: flex;
        }
        .comments-section, .ratings-section {
            margin-top: var(--spacing-xl);
            padding-top: var(--spacing-lg);
            border-top: 1px solid var(--border-color);
        }
        .comment-form, .rating-form {
            display: grid;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-lg);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        input, textarea, select {
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.5rem;
            color: #ffd700;
            cursor: pointer;
        }
        .site-footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: var(--spacing-xl) var(--spacing-md);
            margin-top: var(--spacing-xl);
        }
        .footer-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-xl);
        }
        .footer-section h3 {
            color: white;
            margin-bottom: var(--spacing-md);
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-lg);
            margin-top: var(--spacing-lg);
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        friend-link {
            display: block;
            margin-top: var(--spacing-sm);
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .sidebar {
                border-left: none;
                border-top: 1px solid var(--border-color);
                padding-left: 0;
                padding-top: var(--spacing-lg);
            }
            .header-container {
                padding: var(--spacing-sm);
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                order: 3;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 0;
            }
            .nav-link {
                display: block;
                padding: 0.75rem;
                border-bottom: 1px solid var(--border-color);
            }
            .search-form {
                max-width: 100%;
                order: 2;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .main-container {
                padding: var(--spacing-md) var(--spacing-sm);
            }
            .download-box {
                padding: var(--spacing-md);
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }
        }
        @media (max-width: 480px) {
            html {
                font-size: 14px;
            }
            .social-share {
                justify-content: center;
            }
            .btn {
                padding: 0.6rem 1rem;
            }
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: var(--spacing-sm); }
        .mt-2 { margin-top: var(--spacing-md); }
        .mt-3 { margin-top: var(--spacing-lg); }
        .mb-1 { margin-bottom: var(--spacing-sm); }
        .mb-2 { margin-bottom: var(--spacing-md); }
        .mb-3 { margin-bottom: var(--spacing-lg); }
        .py-1 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
        .py-2 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
        .d-flex { display: flex; }
        .flex-wrap { flex-wrap: wrap; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .gap-1 { gap: var(--spacing-sm); }
        .gap-2 { gap: var(--spacing-md); }