:root {
            --primary-color: #4CAF50;
            --secondary-color: #2196F3;
            --accent-color: #FF9800;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --border-color: #e0e0e0;
            --wiki-blue: #3366cc;
            --wiki-light-blue: #eaf3ff;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            font-size: 16px;
        }
        h1, h2, h3, h4 {
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: #202122;
        }
        h1 {
            font-size: 2.5rem;
            border-bottom: 1px solid #a2a9b1;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 1px solid #a2a9b1;
            padding-bottom: 0.3rem;
            margin-top: 2rem;
        }
        h3 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
        }
        h4 {
            font-size: 1.1rem;
            margin-top: 1.2rem;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1rem;
        }
        header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--wiki-blue);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo:hover {
            color: #2a4b8d;
        }
        .my-logo i {
            color: var(--primary-color);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        nav a {
            text-decoration: none;
            color: #202122;
            font-weight: 500;
            padding: 0.5rem;
            border-radius: 4px;
            transition: background-color 0.3s;
        }
        nav a:hover {
            background-color: var(--wiki-light-blue);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        article {
            background-color: #fff;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }
        aside {
            background-color: #f8f9fa;
            border: 1px solid #a2a9b1;
            border-radius: 8px;
            padding: 1.5rem;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .info-box {
            background-color: #f8f9fa;
            border: 1px solid #a2a9b1;
            padding: 1rem;
            margin-bottom: 1.5rem;
            border-radius: 4px;
        }
        .info-box h3 {
            background-color: #eaf3ff;
            margin: -1rem -1rem 1rem -1rem;
            padding: 0.5rem 1rem;
            border-bottom: 1px solid #a2a9b1;
            font-size: 1.2rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            background-color: #f8f9fa;
        }
        th, td {
            border: 1px solid #a2a9b1;
            padding: 0.75rem;
            text-align: left;
        }
        th {
            background-color: #eaecf0;
            font-weight: 600;
        }
        .article-img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem 0;
            border: 1px solid #ddd;
        }
        .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: #666;
            margin-top: -0.5rem;
            margin-bottom: 1.5rem;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .btn {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            background-color: var(--primary-color);
            color: white;
            text-decoration: none;
            border-radius: 4px;
            border: none;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s;
            text-align: center;
            min-height: 44px;
            min-width: 44px;
        }
        .btn:hover {
            background-color: #3d8b40;
        }
        .btn-secondary {
            background-color: var(--secondary-color);
        }
        .btn-secondary:hover {
            background-color: #0d8bf2;
        }
        .btn-accent {
            background-color: var(--accent-color);
        }
        .btn-accent:hover {
            background-color: #e68900;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .rating {
            display: flex;
            gap: 0.25rem;
            margin: 0.5rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .rating input:checked ~ label,
        .rating input:hover ~ label,
        .rating label:hover ~ label {
            color: #ffd700;
        }
        .social-share {
            display: flex;
            gap: 0.75rem;
            margin: 1.5rem 0;
        }
        .social-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: transform 0.3s;
        }
        .social-icon:hover {
            transform: translateY(-3px);
        }
        .facebook { background-color: #3b5998; }
        .twitter { background-color: #1da1f2; }
        .reddit { background-color: #ff4500; }
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            background-color: var(--wiki-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0.9;
            transition: opacity 0.3s;
            z-index: 99;
        }
        .back-to-top:hover {
            opacity: 1;
        }
        footer {
            background-color: #f8f9fa;
            border-top: 1px solid #a2a9b1;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .friend-link {
            background-color: #eaf3ff;
            padding: 1rem;
            border-radius: 4px;
            margin-bottom: 0.5rem;
        }
        .friend-link a {
            color: var(--wiki-blue);
            text-decoration: none;
        }
        .friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            color: #666;
            font-size: 0.9rem;
            padding-top: 1.5rem;
            border-top: 1px solid #ddd;
        }
        @media (max-width: 768px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .header-container {
                flex-wrap: wrap;
            }
            nav {
                width: 100%;
                order: 3;
                margin-top: 1rem;
                display: none;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            aside {
                position: static;
            }
            .back-to-top {
                bottom: 1rem;
                right: 1rem;
            }
        }
        @media print {
            .social-share, .back-to-top, form, .hamburger {
                display: none;
            }
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 600; }
        .text-muted { color: #666; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .p-2 { padding: 2rem; }
        .bg-light { background-color: var(--light-bg); }
        .border { border: 1px solid var(--border-color); }
        .rounded { border-radius: 8px; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .gap-1 { gap: 1rem; }
        .infobox {
            width: 300px;
            float: right;
            margin: 0 0 1rem 1rem;
            background-color: #f8f9fa;
            border: 1px solid #a2a9b1;
        }
        .citation {
            font-size: 0.85em;
            color: #666;
        }
        .navbox {
            background-color: #f8f9fa;
            border: 1px solid #a2a9b1;
            padding: 1rem;
            margin: 1rem 0;
        }
        .pro-tip {
            background-color: #e8f5e9;
            border-left: 4px solid var(--primary-color);
            padding: 1rem;
            margin: 1.5rem 0;
        }
        .warning {
            background-color: #ffebee;
            border-left: 4px solid #f44336;
            padding: 1rem;
            margin: 1.5rem 0;
        }
        .update-highlight {
            background-color: #e3f2fd;
            border: 2px solid var(--secondary-color);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }