:root {
            --primary-color: #2a4365;
            --secondary-color: #90cdf4;
            --accent-color: #e53e3e;
            --text-dark: #1a202c;
            --text-light: #718096;
            --bg-light: #f7fafc;
            --bg-section: #edf2f7;
            --border-radius: 8px;
            --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--box-shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            background: linear-gradient(90deg, #2a4365, #4c8bf5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            color: #4c8bf5;
        }
        .search-form {
            display: flex;
            max-width: 400px;
            flex-grow: 1;
            margin: 0 30px;
        }
        .search-form input {
            flex-grow: 1;
            padding: 10px 15px;
            border: 2px solid var(--secondary-color);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--accent-color);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--primary-color);
            cursor: pointer;
            background: none;
            border: none;
        }
        nav ul {
            display: flex;
            list-style: none;
            background-color: var(--primary-color);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        nav ul li {
            flex: 1;
        }
        nav ul li a {
            display: block;
            padding: 15px 20px;
            color: white;
            text-align: center;
            font-weight: 600;
            border-right: 1px solid rgba(255,255,255,0.1);
        }
        nav ul li:last-child a {
            border-right: none;
        }
        nav ul li a:hover {
            background-color: var(--accent-color);
            color: white;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--accent-color);
        }
        .breadcrumb span {
            margin: 0 5px;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 30px;
            padding: 30px 0;
        }
        .content-area {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--box-shadow);
        }
        aside {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 20px;
            box-shadow: var(--box-shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .update-time {
            background-color: var(--bg-section);
            padding: 15px;
            border-radius: var(--border-radius);
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: var(--text-light);
            border-left: 4px solid var(--accent-color);
        }
        .update-time i {
            margin-right: 8px;
            color: var(--accent-color);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--text-dark);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--text-light);
            margin: 20px 0 10px;
            font-weight: 600;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .intro {
            font-size: 1.1rem;
            background-color: var(--bg-section);
            padding: 20px;
            border-radius: var(--border-radius);
            margin-bottom: 30px;
            border-left: 4px solid var(--secondary-color);
        }
        .highlight {
            background-color: #fffacd;
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 25px 0;
            border: 1px dashed var(--accent-color);
        }
        .highlight strong {
            color: var(--accent-color);
        }
        .build-summary {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .summary-card {
            background-color: var(--bg-section);
            padding: 20px;
            border-radius: var(--border-radius);
            text-align: center;
            transition: var(--transition);
        }
        .summary-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--box-shadow);
        }
        .summary-card i {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .rating {
            margin: 30px 0;
            padding: 20px;
            background-color: #f0f8ff;
            border-radius: var(--border-radius);
        }
        .stars {
            color: #ffc107;
            font-size: 1.5rem;
            margin-bottom: 10px;
        }
        .rating-form label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
        }
        .rating-form select, .comment-form textarea, .comment-form input {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .rating-form button, .comment-form button {
            background-color: var(--primary-color);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .rating-form button:hover, .comment-form button:hover {
            background-color: var(--accent-color);
        }
        .image-container {
            margin: 30px 0;
            text-align: center;
        }
        .image-container img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .image-caption {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 10px;
            font-style: italic;
        }
        .table-container {
            overflow-x: auto;
            margin: 30px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        th, td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        tr:hover {
            background-color: #f7fafc;
        }
        .related-links {
            background-color: var(--bg-section);
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 30px 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .related-links ul {
            list-style: none;
            column-count: 2;
            column-gap: 30px;
        }
        .related-links li {
            margin-bottom: 12px;
            break-inside: avoid;
        }
        .related-links a {
            display: block;
            padding: 8px 0;
            border-bottom: 1px dotted #cbd5e0;
        }
        .related-links a:hover {
            border-bottom-color: var(--accent-color);
        }
        .quick-nav {
            margin-bottom: 30px;
        }
        .quick-nav h3 {
            margin-top: 0;
            font-size: 1.2rem;
        }
        .quick-nav ul {
            list-style: none;
        }
        .quick-nav li {
            margin-bottom: 10px;
        }
        .quick-nav a {
            display: block;
            padding: 12px 15px;
            background-color: var(--bg-section);
            border-radius: var(--border-radius);
            border-left: 3px solid transparent;
        }
        .quick-nav a:hover {
            background-color: var(--secondary-color);
            color: var(--primary-color);
            border-left-color: var(--accent-color);
        }
        .author-box {
            text-align: center;
            padding: 20px;
            background-color: var(--bg-section);
            border-radius: var(--border-radius);
        }
        .author-box img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin-bottom: 15px;
            object-fit: cover;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: white;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #cbd5e0;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.1);
            padding: 15px;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            text-align: center;
        }
        friend-link a {
            color: white;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            .related-links ul {
                column-count: 1;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                width: 100%;
                margin: 15px 0 0;
            }
            .mobile-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                margin-top: 15px;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
            }
            nav ul li a {
                border-right: none;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .build-summary {
                grid-template-columns: 1fr;
            }
        }