:root {
            --primary-color: #0d5ca5; 
            --secondary-color: #c9243f; 
            --accent-color: #a5acaf; 
            --dark-color: #222222;
            --light-color: #f8f9fa;
            --text-color: #333333;
            --border-radius: 8px;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .site-header {
            background-color: var(--dark-color);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
        }
        .logo i {
            color: var(--secondary-color);
            margin-right: 10px;
        }
        .logo span {
            color: var(--primary-color);
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-color);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #eee;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 10px;
            color: #aaa;
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .hero {
            background: linear-gradient(rgba(13, 92, 165, 0.85), rgba(34, 34, 34, 0.9)), url('https://images.unsplash.com/photo-1540744760572-3e4c5e5a3b0a?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 5rem 0;
            text-align: center;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.95;
        }
        .search-section {
            background-color: var(--light-color);
            padding: 2.5rem 0;
            text-align: center;
            margin-bottom: 3rem;
            border-radius: var(--border-radius);
        }
        .search-form {
            max-width: 700px;
            margin: 0 auto;
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 4rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            font-size: 1.1rem;
        }
        .article-content section {
            margin-bottom: 3.5rem;
        }
        .article-content h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent-color);
        }
        .article-content h3 {
            font-size: 1.7rem;
            color: var(--dark-color);
            margin: 2rem 0 1rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content em {
            font-style: italic;
            color: #555;
        }
        .article-content strong {
            color: var(--secondary-color);
            font-weight: 700;
        }
        .highlight-box {
            background-color: #f0f7ff;
            border-left: 5px solid var(--primary-color);
            padding: 1.8rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 10px;
            background-color: var(--light-color);
            color: #666;
        }
        .link-list {
            background-color: var(--light-color);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .link-list h4 {
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        .link-list ul {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .link-list li a {
            background-color: white;
            padding: 8px 15px;
            border-radius: 30px;
            border: 1px solid #ddd;
            font-size: 0.9rem;
            display: inline-block;
        }
        .link-list li a:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        .sidebar-widget {
            background-color: var(--light-color);
            padding: 1.8rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--primary-color);
            margin-bottom: 1.2rem;
            font-size: 1.5rem;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin-bottom: 10px;
        }
        .stars .star:hover,
        .stars .star.active {
            color: #ffc107;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
        }
        .form-control {
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(13, 92, 165, 0.2);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: var(--accent-color);
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        .footer-links ul li {
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid #444;
        }
        friend-link h5 {
            color: var(--accent-color);
            margin-bottom: 1rem;
        }
        friend-link ul {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        friend-link a {
            color: #aaa;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            html {
                font-size: 14px;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: var(--dark-color);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 2rem;
                transition: left 0.5s ease;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
                text-align: center;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                flex-direction: column;
            }
            .btn {
                width: 100%;
            }
        }