:root {
            --primary-dark: #1a365d;
            --primary: #2d5a9e;
            --primary-light: #4a7bc8;
            --accent: #e63946;
            --accent-light: #ff7b8a;
            --text-dark: #2d3748;
            --text: #4a5568;
            --text-light: #718096;
            --background: #f7fafc;
            --card-bg: #ffffff;
            --border: #e2e8f0;
            --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;
            --border-radius: 8px;
            --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: 1.7;
            color: var(--text);
            background-color: var(--background);
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 1.25rem 0;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent-light);
            transform: translateY(-2px);
        }
        .my-logo i {
            font-size: 2rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover {
            color: var(--accent-light);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent-light);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--card-bg);
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--border);
            font-size: 0.9rem;
        }
        .breadcrumb-container {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-light);
            margin: 0 0.5rem;
        }
        .main-container {
            max-width: var(--max-width);
            margin: 2rem auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: var(--card-bg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 2.5rem;
            overflow: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--primary-dark);
            line-height: 1.3;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 4px solid var(--accent);
            padding-bottom: 0.75rem;
            margin-top: 0;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--primary);
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary);
        }
        h4 {
            font-size: 1.4rem;
            color: var(--text-dark);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 500;
            margin-bottom: 2rem;
            padding: 1.5rem;
            background-color: rgba(42, 157, 143, 0.08);
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary);
        }
        strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        em {
            color: var(--accent);
            font-style: italic;
        }
        a.content-link {
            color: var(--primary);
            text-decoration: none;
            border-bottom: 1px dotted var(--primary-light);
            transition: var(--transition);
            font-weight: 600;
        }
        a.content-link:hover {
            color: var(--accent);
            border-bottom: 2px solid var(--accent);
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            background-color: rgba(230, 57, 70, 0.05);
            font-style: italic;
            color: var(--text-dark);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            color: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
        }
        .highlight-box h3 {
            color: white;
            margin-top: 0;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.75rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 2rem auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: var(--card-bg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 1.8rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--border);
            margin-bottom: 1.5rem;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1rem;
            border: 2px solid var(--border);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: var(--primary-dark);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffd700;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars span {
            margin: 0 0.15rem;
            transition: var(--transition);
        }
        .stars span:hover {
            transform: scale(1.3);
        }
        .rating-form input,
        .comment-form textarea,
        .comment-form input {
            width: 100%;
            padding: 0.9rem;
            margin-bottom: 1rem;
            border: 1px solid var(--border);
            border-radius: var(--border-radius);
            font-family: inherit;
            transition: var(--transition);
        }
        .rating-form input:focus,
        .comment-form textarea:focus,
        .comment-form input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(45, 90, 158, 0.2);
        }
        .submit-button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .submit-button:hover {
            background-color: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 0, 0, 0.15);
        }
        .toc ul {
            list-style: none;
            margin-left: 0;
        }
        .toc li {
            margin-bottom: 0.75rem;
            padding-left: 1rem;
            position: relative;
        }
        .toc li::before {
            content: '▶';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-size: 0.8rem;
        }
        .toc a {
            color: var(--text);
            text-decoration: none;
            transition: var(--transition);
            display: block;
            padding: 0.3rem 0;
        }
        .toc a:hover {
            color: var(--accent);
            padding-left: 0.5rem;
        }
        .update-info {
            background-color: rgba(45, 90, 158, 0.08);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2.5rem 0;
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.95rem;
        }
        .update-info i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .site-footer {
            background-color: var(--primary-dark);
            color: white;
            padding: 3rem 1.5rem 2rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-widget h4 {
            color: white;
            margin-top: 0;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid rgba(255, 255, 255, 0.2);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-links a:hover {
            color: var(--accent-light);
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-top: 1rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1rem;
        }
        .friend-links a {
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .friend-links a:hover {
            background-color: var(--accent);
            transform: translateY(-3px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 500px;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
                width: 100%;
                padding: 1rem 0;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 0.9rem 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            article {
                padding: 1.8rem;
            }
            .main-container {
                padding: 0 1rem;
                gap: 1.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .sidebar-widget, article {
            animation: fadeIn 0.6s ease forwards;
        }
        @media print {
            .site-header, .sidebar, .site-footer, .breadcrumb,
            .search-form, .rating-form, .comment-form, .hamburger {
                display: none;
            }
            .main-container {
                grid-template-columns: 1fr;
                max-width: 100%;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
            body {
                background-color: white;
                color: black;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }