:root {
            --primary: #0066b2; 
            --secondary: #ffcc00; 
            --dark: #1a1a1a;
            --light: #f8f9fa;
            --gray: #6c757d;
            --success: #28a745;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #fff;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            background-color: var(--dark);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
        }
        .logo span {
            color: var(--secondary);
        }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-desktop a {
            color: white;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-desktop a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: width 0.3s;
        }
        .nav-desktop a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .nav-mobile {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: var(--dark);
            padding: 4rem 2rem 2rem;
            transition: right 0.4s ease;
            z-index: 999;
            overflow-y: auto;
        }
        .nav-mobile.active {
            right: 0;
        }
        .nav-mobile ul {
            list-style: none;
        }
        .nav-mobile li {
            margin-bottom: 1.5rem;
        }
        .nav-mobile a {
            color: white;
            font-size: 1.2rem;
            display: block;
            padding: 0.5rem 0;
            border-bottom: 1px solid #333;
        }
        .close-menu {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 0;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #aaa;
        }
        .search-box {
            background: var(--light);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin-bottom: 3rem;
            box-shadow: var(--shadow);
            text-align: center;
        }
        .search-box h2 {
            margin-bottom: 1rem;
            color: var(--dark);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            outline: none;
        }
        .search-input:focus {
            border-color: var(--primary);
        }
        .search-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
        }
        .search-btn:hover {
            background: #0056a0;
        }
        .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 {
            background: white;
            padding: 0;
        }
        .article-header {
            margin-bottom: 2.5rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 1rem;
        }
        .article-meta {
            color: var(--gray);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .content-section {
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #eee;
        }
        .content-section h2 {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary);
        }
        .content-section h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin: 1.8rem 0 1rem;
        }
        .content-section p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 5px solid var(--secondary);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .feature-img {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .link-list {
            list-style: none;
            background: var(--light);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
        }
        .link-list li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .link-list li:before {
            content: '➤';
            position: absolute;
            left: 0;
            color: var(--primary);
        }
        .sidebar {
            background: white;
        }
        .sidebar-widget {
            background: var(--light);
            padding: 1.8rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--dark);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffcc00;
            margin: 1rem 0;
        }
        .stars i {
            cursor: pointer;
            margin: 0 2px;
        }
        .rating-form {
            display: none;
            margin-top: 1rem;
        }
        .rating-form.active {
            display: block;
        }
        .rating-input {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
        }
        .submit-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            width: 100%;
        }
        .submit-btn:hover {
            background: #0056a0;
        }
        .comments-section {
            margin-top: 4rem;
        }
        .comment-form {
            background: var(--light);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
        }
        .comment-form h3 {
            margin-bottom: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-control {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }
        .comment-list {
            background: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
        }
        .comment {
            padding: 1.5rem 0;
            border-bottom: 1px solid #eee;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }
        @media (max-width: 768px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: var(--secondary);
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.6rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid #333;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        .btn {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 0.8rem 1.8rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background: #0056a0;
            transform: translateY(-2px);
        }
        .text-center {
            text-align: center;
        }
        .mb-3 {
            margin-bottom: 3rem;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        @media (max-width: 992px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .content-section h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 576px) {
            .search-form {
                flex-direction: column;
            }
            .search-input, .search-btn {
                border-radius: var(--border-radius);
                margin-bottom: 0.5rem;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
        }