:root {
            --primary-color: #2a4365;
            --secondary-color: #e53e3e;
            --accent-color: #38a169;
            --light-color: #f7fafc;
            --dark-color: #1a202c;
            --gray-color: #a0aec0;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --border-radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--dark-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--primary-color);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            color: var(--secondary-color);
        }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-desktop a:hover {
            color: #90cdf4;
        }
        .nav-desktop a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .nav-desktop a:hover:after {
            width: 100%;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--primary-color);
            padding: 1rem;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            z-index: 999;
        }
        .nav-mobile.active {
            display: block;
        }
        .nav-mobile ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 0.8rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .nav-mobile a:hover {
            background-color: rgba(255,255,255,0.1);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #edf2f7;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child):after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--gray-color);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 2rem 0;
        }
        .article-header {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--gray-color);
            font-size: 0.95rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .article-content {
                grid-template-columns: 1fr;
            }
        }
        .content-main {
            font-size: 1.1rem;
        }
        .content-main h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .content-main h3 {
            font-size: 1.6rem;
            color: var(--dark-color);
            margin: 2rem 0 1rem;
        }
        .content-main h4 {
            font-size: 1.3rem;
            color: #4a5568;
            margin: 1.5rem 0 0.8rem;
        }
        .content-main p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .content-main strong {
            color: var(--secondary-color);
            font-weight: 700;
        }
        .content-main em {
            color: var(--accent-color);
            font-style: italic;
        }
        .content-main blockquote {
            border-left: 4px solid var(--accent-color);
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #4a5568;
            background-color: #f0fff4;
            padding: 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight-box {
            background-color: #ebf8ff;
            border: 1px solid #90cdf4;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .inline-link {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted currentColor;
            transition: var(--transition);
        }
        .inline-link:hover {
            color: #c53030;
            border-bottom-style: solid;
        }
        .article-image {
            margin: 2.5rem auto;
            text-align: center;
        }
        .article-image img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .article-image img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            font-size: 0.9rem;
            color: var(--gray-color);
            margin-top: 0.5rem;
            font-style: italic;
        }
        .content-sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
            max-height: calc(100vh - 140px);
            overflow-y: auto;
        }
        .sidebar-widget {
            background-color: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin-bottom: 2rem;
            border: 1px solid #e2e8f0;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary-color);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid #cbd5e0;
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #c53030;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.3rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #e2e8f0;
        }
        .stars .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars .star:hover,
        .stars .star.active {
            color: #f6ad55;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #cbd5e0;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
            margin-bottom: 1rem;
        }
        .comment-form button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .comment-form button:hover {
            background-color: #2f855a;
        }
        .toc-widget ul {
            list-style: none;
        }
        .toc-widget li {
            margin-bottom: 0.8rem;
        }
        .toc-widget a {
            color: var(--dark-color);
            text-decoration: none;
            display: block;
            padding: 0.3rem 0;
            border-left: 3px solid transparent;
            padding-left: 0.8rem;
            transition: var(--transition);
        }
        .toc-widget a:hover {
            border-left-color: var(--secondary-color);
            color: var(--secondary-color);
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding: 0.8rem;
            background-color: white;
            border-radius: 6px;
            transition: var(--transition);
        }
        .related-links li:hover {
            background-color: #edf2f7;
            transform: translateX(5px);
        }
        .related-links a {
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-col h4 {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: #90cdf4;
            position: relative;
            padding-bottom: 0.5rem;
        }
        .footer-col h4:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--secondary-color);
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 0.8rem;
        }
        .footer-col a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 1rem 0;
            border-left: 4px solid var(--accent-color);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .py-1 { padding-top: 1rem; padding-bottom: 1rem; }
        .emoji { font-size: 1.2em; }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            .content-main h2 { font-size: 1.8rem; }
            .content-main h3 { font-size: 1.5rem; }
            .menu-toggle {
                display: block;
            }
            .nav-desktop {
                display: none;
            }
            .header-container {
                flex-wrap: wrap;
            }
        }