* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            color: #202122;
            background-color: #f6f6f6;
            max-width: 100%;
            overflow-x: hidden;
        }
        header {
            background-color: #f8f9fa;
            border-bottom: 1px solid #a2a9b1;
            padding: 0.5em 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1em;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: #3366cc;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo:hover {
            text-decoration: underline;
        }
        .my-logo i {
            margin-right: 8px;
            color: #ff6b6b;
        }
        .desktop-nav {
            display: flex;
            gap: 1.5em;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            color: #3366cc;
            text-decoration: none;
            font-size: 0.95rem;
            padding: 0.5em;
            border-radius: 3px;
            min-height: 44px;
            min-width: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .desktop-nav a:hover {
            background-color: #eaf3ff;
            text-decoration: underline;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #3366cc;
            min-height: 44px;
            min-width: 44px;
            align-items: center;
            justify-content: center;
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: flex;
            }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: #f8f9fa;
            border-top: 1px solid #a2a9b1;
            padding: 1em;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: #3366cc;
            text-decoration: none;
            padding: 0.75em 1em;
            border-bottom: 1px solid #e0e0e0;
            min-height: 44px;
            display: flex;
            align-items: center;
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .mobile-nav a:hover {
            background-color: #eaf3ff;
        }
        .content-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1em;
            display: flex;
            gap: 2em;
        }
        @media (max-width: 1024px) {
            .content-container {
                flex-direction: column;
            }
        }
        main {
            flex: 1;
            background-color: white;
            padding: 2em;
            border-radius: 5px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }
        aside {
            width: 300px;
            background-color: #f8f9fa;
            border: 1px solid #a2a9b1;
            border-radius: 5px;
            padding: 1.5em;
            align-self: flex-start;
        }
        @media (max-width: 1024px) {
            aside {
                width: 100%;
            }
        }
        h1 {
            font-size: 1.8rem;
            border-bottom: 1px solid #a2a9b1;
            padding-bottom: 0.3em;
            margin-bottom: 1em;
            color: #000;
        }
        h2 {
            font-size: 1.5rem;
            border-bottom: 1px solid #a2a9b1;
            padding-bottom: 0.3em;
            margin: 1.5em 0 0.8em 0;
            color: #000;
        }
        h3 {
            font-size: 1.2rem;
            margin: 1.2em 0 0.5em 0;
            color: #54595d;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1em 0 0.5em 0;
            color: #54595d;
        }
        p {
            margin-bottom: 1em;
            line-height: 1.7;
        }
        ul, ol {
            margin-left: 1.5em;
            margin-bottom: 1em;
        }
        li {
            margin-bottom: 0.5em;
        }
        .toc {
            background-color: #f8f9fa;
            border: 1px solid #a2a9b1;
            padding: 1em;
            margin-bottom: 1.5em;
            border-radius: 5px;
            font-size: 0.95rem;
        }
        .toc-title {
            font-weight: bold;
            margin-bottom: 0.5em;
            text-align: center;
        }
        .toc ul {
            list-style-type: none;
            margin-left: 0;
        }
        .toc li {
            margin-bottom: 0.3em;
        }
        .toc a {
            color: #3366cc;
            text-decoration: none;
        }
        .toc a:hover {
            text-decoration: underline;
        }
        .infobox {
            background-color: #f8f9fa;
            border: 1px solid #a2a9b1;
            padding: 1em;
            margin-bottom: 1.5em;
            border-radius: 5px;
            font-size: 0.9rem;
        }
        .infobox-title {
            text-align: center;
            font-weight: bold;
            font-size: 1.1rem;
            margin-bottom: 0.8em;
            color: #000;
        }
        .infobox-row {
            display: flex;
            margin-bottom: 0.5em;
        }
        .infobox-label {
            font-weight: bold;
            min-width: 120px;
        }
        .article-image {
            max-width: 100%;
            height: auto;
            border: 1px solid #c8ccd1;
            border-radius: 5px;
            margin: 1em 0;
        }
        .image-caption {
            font-size: 0.9rem;
            text-align: center;
            color: #54595d;
            margin-top: 0.3em;
            margin-bottom: 1em;
        }
        .game-module {
            background-color: #f8f9fa;
            border-left: 4px solid #3366cc;
            padding: 1.5em;
            margin: 1.5em 0;
            border-radius: 0 5px 5px 0;
        }
        .module-title {
            font-weight: bold;
            font-size: 1.2rem;
            margin-bottom: 0.8em;
            color: #3366cc;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: #3366cc;
            color: white;
            border: none;
            padding: 0.8em 1.5em;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            text-decoration: none;
            min-height: 44px;
            min-width: 44px;
            margin: 0.3em;
            transition: background-color 0.2s;
        }
        .btn:hover {
            background-color: #2a4fa3;
            text-decoration: none;
            color: white;
        }
        .btn-secondary {
            background-color: #72777d;
        }
        .btn-secondary:hover {
            background-color: #5a5f65;
        }
        .btn-success {
            background-color: #00af89;
        }
        .btn-success:hover {
            background-color: #008c6d;
        }
        .form-group {
            margin-bottom: 1.2em;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5em;
            font-weight: bold;
        }
        .form-control {
            width: 100%;
            padding: 0.8em;
            border: 1px solid #a2a9b1;
            border-radius: 5px;
            font-size: 1rem;
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .comment {
            border-bottom: 1px solid #e0e0e0;
            padding: 1em 0;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5em;
            font-size: 0.9rem;
            color: #54595d;
        }
        .comment-author {
            font-weight: bold;
            color: #3366cc;
        }
        .rating-stars {
            color: #ffc107;
            margin-bottom: 0.5em;
        }
        .social-sharing {
            display: flex;
            gap: 0.5em;
            margin: 1.5em 0;
        }
        .social-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
        }
        .facebook {
            background-color: #3b5998;
        }
        .twitter {
            background-color: #1da1f2;
        }
        .pinterest {
            background-color: #bd081c;
        }
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: #3366cc;
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.5rem;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            z-index: 99;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .back-to-top.visible {
            opacity: 1;
        }
        footer {
            background-color: #f8f9fa;
            border-top: 1px solid #a2a9b1;
            padding: 2em 1em;
            margin-top: 3em;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5em;
            margin-bottom: 1.5em;
        }
        .footer-links a {
            color: #3366cc;
            text-decoration: none;
        }
        .footer-links a:hover {
            text-decoration: underline;
        }
        friend-link {
            display: block;
            margin: 1em 0;
        }
        .copyright {
            color: #54595d;
            font-size: 0.9rem;
            text-align: center;
            padding-top: 1em;
            border-top: 1px solid #e0e0e0;
        }
        @media (max-width: 768px) {
            .content-container {
                padding: 0.5em;
            }
            main {
                padding: 1.5em;
            }
            aside {
                padding: 1em;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .social-sharing {
                justify-content: center;
            }
        }
        .text-center {
            text-align: center;
        }
        .text-bold {
            font-weight: bold;
        }
        .text-muted {
            color: #54595d;
        }
        .mt-1 { margin-top: 0.5em; }
        .mt-2 { margin-top: 1em; }
        .mt-3 { margin-top: 1.5em; }
        .mb-1 { margin-bottom: 0.5em; }
        .mb-2 { margin-bottom: 1em; }
        .mb-3 { margin-bottom: 1.5em; }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3em;
        }
        .game-tip {
            background-color: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 1em;
            margin: 1em 0;
            border-radius: 0 5px 5px 0;
        }
        .update-log {
            background-color: #e7f4e4;
            border: 1px solid #c3e6cb;
            padding: 1em;
            margin: 1.5em 0;
            border-radius: 5px;
        }
        .update-version {
            font-weight: bold;
            color: #155724;
            margin-bottom: 0.5em;
        }
        .update-date {
            font-size: 0.9rem;
            color: #54595d;
            margin-bottom: 0.5em;
        }
        .download-section {
            background-color: #eaf3ff;
            border: 2px dashed #3366cc;
            padding: 1.5em;
            margin: 1.5em 0;
            border-radius: 5px;
            text-align: center;
        }
        .download-btn {
            display: inline-block;
            background-color: #00af89;
            color: white;
            padding: 1em 2em;
            border-radius: 5px;
            text-decoration: none;
            font-weight: bold;
            margin: 0.5em;
            font-size: 1.1rem;
        }
        .download-btn:hover {
            background-color: #008c6d;
        }