:root {
            --primary-color: #1a237e;
            --secondary-color: #ffab00;
            --accent-color: #d32f2f;
            --light-color: #f5f5f5;
            --dark-color: #121212;
            --text-color: #333;
            --text-light: #777;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --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: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            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: 1.8rem;
            font-weight: 800;
            color: var(--secondary-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            color: white;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 0.8rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin: 0 10px;
            color: var(--text-light);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav a {
            color: white;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            font-weight: 500;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-color), #283593);
            color: white;
            padding: 4rem 0;
            text-align: center;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        .search-box {
            max-width: 600px;
            margin: 2rem auto;
            padding: 2rem;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .search-box h2 {
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--accent-color);
        }
        .article-content {
            max-width: 900px;
            margin: 0 auto 3rem;
        }
        .article-content h2 {
            color: var(--primary-color);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary-color);
            font-size: 2rem;
        }
        .article-content h3 {
            color: var(--dark-color);
            margin: 2rem 0 1rem;
            font-size: 1.5rem;
        }
        .article-content h4 {
            color: var(--text-color);
            margin: 1.5rem 0 0.8rem;
            font-size: 1.2rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.05rem;
        }
        .article-content strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .featured-image {
            float: right;
            margin: 0 0 1.5rem 2rem;
            max-width: 400px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .internal-links {
            background-color: var(--light-color);
            padding: 1.5rem;
            border-left: 4px solid var(--secondary-color);
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .internal-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.8rem;
        }
        .internal-links a {
            display: block;
            padding: 0.5rem;
            background: white;
            border-radius: 4px;
            border: 1px solid #ddd;
        }
        .internal-links a:hover {
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }
        .update-time {
            font-style: italic;
            color: var(--text-light);
            font-size: 0.9rem;
            text-align: right;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .rating-section, .comments-section {
            background-color: var(--light-color);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .rating-section h3, .comments-section h3 {
            color: var(--primary-color);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1.5rem 0;
            font-size: 2rem;
            color: #ddd;
        }
        .star-rating .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--secondary-color);
        }
        .rating-form, .comment-form {
            display: grid;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .rating-form input,
        .comment-form input,
        .comment-form textarea {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn-submit {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: bold;
            transition: var(--transition);
            justify-self: start;
        }
        .btn-submit:hover {
            background-color: var(--accent-color);
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            color: var(--secondary-color);
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            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(--secondary-color);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero h1 { font-size: 2.3rem; }
            .article-content { padding: 0 15px; }
            .featured-image { float: none; margin: 1rem auto; max-width: 100%; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                position: fixed;
                top: 70px;
                left: -100%;
                flex-direction: column;
                background-color: var(--primary-color);
                width: 100%;
                text-align: center;
                transition: 0.3s;
                box-shadow: 0 10px 10px rgba(0,0,0,0.1);
                z-index: 999;
                padding: 1rem 0;
            }
            .main-nav.active ul {
                left: 0;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-radius: 0;
            }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .search-form { flex-direction: column; }
            .search-form input { border-radius: var(--border-radius); margin-bottom: 0.5rem; }
            .search-form button { border-radius: var(--border-radius); padding: 0.8rem; }
            .internal-links ul { grid-template-columns: 1fr; }
        }