* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #1a237e; 
            --secondary: #ffab00; 
            --accent: #4a148c; 
            --light: #f5f5f7;
            --dark: #121212;
            --gray: #757575;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --radius: 8px;
            --max-width: 1200px;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Georgia', 'Times New Roman', serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: #333;
            background-color: #fff;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: var(--primary);
        }
        h1 { font-size: 2.8rem; margin-top: 2rem; }
        h2 { font-size: 2.2rem; margin-top: 3rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--secondary); }
        h3 { font-size: 1.8rem; margin-top: 2.5rem; color: var(--accent); }
        h4 { font-size: 1.4rem; margin-top: 2rem; }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background-color: var(--primary);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary);
        }
        .my-logo:hover {
            color: var(--secondary);
            text-decoration: none;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--secondary);
            text-decoration: none;
        }
        .main-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary);
            transition: var(--transition);
        }
        .main-nav a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--light);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child):after {
            content: '/';
            margin: 0 10px;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .search-section {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            padding: 3rem 0;
            text-align: center;
            color: white;
        }
        .search-section h2 {
            color: white;
            border: none;
            margin-top: 0;
        }
        .search-form {
            max-width: 600px;
            margin: 2rem auto 0;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-form input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
        }
        .search-form button {
            background-color: var(--secondary);
            color: var(--dark);
            border: none;
            padding: 0 2rem;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #ffd740;
        }
        .main-content {
            padding: 3rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        .article-content {
            background: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .lead {
            font-size: 1.3rem;
            font-weight: bold;
            color: var(--primary);
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: #e8eaf6;
            border-left: 5px solid var(--secondary);
        }
        .highlight-box {
            background-color: #f3e5f5;
            border-left: 5px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .image-wrapper {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .image-wrapper img {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .image-wrapper img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .related-links {
            margin: 2rem 0;
            padding: 1.5rem;
            background-color: #e1f5fe;
            border-radius: var(--radius);
        }
        .related-links h4 {
            color: #01579b;
        }
        .related-links ul {
            list-style-position: inside;
            margin-top: 1rem;
        }
        .related-links li {
            margin-bottom: 0.5rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .widget h3 {
            margin-top: 0;
            font-size: 1.4rem;
        }
        .rating-widget form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars .star:hover,
        .stars .star.active {
            color: var(--secondary);
        }
        .rating-widget input, .rating-widget textarea {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: var(--radius);
            font-family: inherit;
        }
        .rating-widget button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem;
            border-radius: var(--radius);
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-widget button:hover {
            background-color: var(--accent);
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--gray);
            text-align: center;
            padding: 1rem;
            background-color: #f9f9f9;
            border-radius: var(--radius);
        }
        .comments-section {
            margin-top: 4rem;
            padding-top: 3rem;
            border-top: 2px solid #eee;
        }
        .comment-form {
            display: grid;
            gap: 1rem;
            margin-bottom: 3rem;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 1rem;
            border: 1px solid #ccc;
            border-radius: var(--radius);
            font-family: inherit;
        }
        .comment-form button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--radius);
            font-weight: bold;
            cursor: pointer;
            justify-self: start;
        }
        .comment {
            padding: 1.5rem;
            border: 1px solid #eee;
            border-radius: var(--radius);
            margin-bottom: 1.5rem;
            background-color: #fafafa;
        }
        .comment-author {
            font-weight: bold;
            color: var(--primary);
        }
        .comment-date {
            font-size: 0.9rem;
            color: var(--gray);
            margin-left: 1rem;
        }
        .site-footer {
            background-color: var(--dark);
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            border-bottom: 1px solid #444;
            padding-bottom: 0.5rem;
        }
        .footer-links ul {
            list-style: none;
            margin-top: 1rem;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .friend-links-section {
            background-color: #111;
            padding: 1.5rem;
            border-radius: var(--radius);
        }
        friend-link {
            display: inline-block;
            margin-right: 1rem;
            margin-bottom: 0.5rem;
            padding: 0.3rem 0.8rem;
            background-color: #222;
            border-radius: 4px;
        }
        friend-link a {
            color: #4fc3f7;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #999;
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
            }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-content {
                flex-wrap: wrap;
            }
            .main-nav {
                width: 100%;
                order: 3;
                margin-top: 1rem;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                flex-direction: column;
                border-radius: var(--radius);
            }
            .search-form input,
            .search-form button {
                width: 100%;
                border-radius: 0;
                padding: 1rem;
            }
            .article-content {
                padding: 1.5rem;
            }
        }
        @media print {
            .site-header, .search-section, .sidebar, .comments-section, .site-footer {
                display: none;
            }
            .main-content {
                grid-template-columns: 1fr;
                padding: 0;
            }
        }