:root {
            --primary-color: #4a6fa5;
            --secondary-color: #166088;
            --accent-color: #4fc3a1;
            --text-color: #333333;
            --light-bg: #f8f9fa;
            --border-color: #e0e0e0;
            --wiki-blue: #3366cc;
            --wiki-light-blue: #e6f2ff;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        header {
            background-color: var(--light-bg);
            border-bottom: 1px solid var(--border-color);
            padding: 15px 0;
            margin-bottom: 25px;
        }
        .logo-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 15px;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--wiki-blue);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            color: var(--accent-color);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary-color);
            cursor: pointer;
        }
        nav {
            background-color: var(--wiki-light-blue);
            border-radius: 4px;
            padding: 10px 15px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-links li {
            margin-right: 20px;
        }
        .nav-links a {
            color: var(--wiki-blue);
            text-decoration: none;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: background-color 0.2s;
            display: inline-block;
            min-width: 44px;
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nav-links a:hover {
            background-color: rgba(51, 102, 204, 0.1);
            text-decoration: underline;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 30px;
            margin-bottom: 40px;
        }
        .content-area {
            background-color: #fff;
        }
        aside {
            background-color: var(--light-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            align-self: start;
            position: sticky;
            top: 20px;
        }
        .info-box {
            margin-bottom: 25px;
        }
        .info-box h3 {
            background-color: var(--primary-color);
            color: white;
            padding: 10px 15px;
            margin: -20px -20px 15px -20px;
            border-radius: 8px 8px 0 0;
            font-size: 1.2rem;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--text-color);
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--border-color);
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin: 30px 0 15px 0;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 25px 0 10px 0;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--text-color);
            margin: 20px 0 10px 0;
        }
        p {
            margin-bottom: 15px;
            line-height: 1.7;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 20px 0;
            border: 1px solid var(--border-color);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 5px;
            font-size: 0.9rem;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 8px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            background-color: white;
        }
        th, td {
            border: 1px solid var(--border-color);
            padding: 12px 15px;
            text-align: left;
        }
        th {
            background-color: var(--light-bg);
            font-weight: 600;
        }
        .btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 12px 24px;
            border-radius: 4px;
            text-decoration: none;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: background-color 0.2s;
            min-width: 44px;
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .btn:hover {
            background-color: var(--secondary-color);
        }
        .btn-accent {
            background-color: var(--accent-color);
        }
        .btn-accent:hover {
            background-color: #3da88a;
        }
        .search-box, .comment-form, .rating-form {
            background-color: var(--light-bg);
            padding: 20px;
            border-radius: 8px;
            margin: 25px 0;
            border: 1px solid var(--border-color);
        }
        .form-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
        }
        input, select, textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .social-sharing {
            display: flex;
            gap: 10px;
            margin: 25px 0;
        }
        .social-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
        }
        .facebook { background-color: #3b5998; }
        .twitter { background-color: #1da1f2; }
        .reddit { background-color: #ff4500; }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.5rem;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
            z-index: 1000;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        footer {
            background-color: var(--light-bg);
            border-top: 1px solid var(--border-color);
            padding: 30px 0;
            margin-top: 50px;
            text-align: center;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 20px;
            gap: 20px;
        }
        .footer-links a {
            color: var(--wiki-blue);
            text-decoration: none;
        }
        .footer-links a:hover {
            text-decoration: underline;
        }
        .copyright {
            color: #666;
            font-size: 0.9rem;
            margin-top: 20px;
        }
        friend-link {
            display: block;
            margin-top: 15px;
        }
        .update-badge {
            display: inline-block;
            background-color: #ff6b6b;
            color: white;
            padding: 5px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            margin-left: 10px;
            vertical-align: middle;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin-right: 0;
                margin-bottom: 10px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .social-sharing {
                justify-content: center;
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 10px;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            .btn {
                padding: 10px 20px;
            }
        }
        @media print {
            .social-sharing,
            .back-to-top,
            .comment-form,
            .rating-form,
            .search-box,
            .mobile-menu-btn {
                display: none !important;
            }
            body {
                max-width: 100%;
                padding: 0;
            }
            a {
                color: #000;
                text-decoration: none;
            }
        }