* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
        }
        .logo a {
            color: white;
            text-decoration: none;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            transition: color 0.3s;
        }
        .nav-desktop a:hover {
            color: #ffd700;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 1rem;
            color: #333;
            text-decoration: none;
            border-bottom: 1px solid #eee;
        }
        .nav-mobile a:hover {
            background: #f8f9fa;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 0.5rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #667eea;
            text-decoration: none;
        }
        .search-container {
            background: white;
            padding: 2rem 0;
            margin: 1rem 0;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 0.75rem;
            border: 2px solid #667eea;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-button {
            background: #667eea;
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: #5a6fd8;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .article-content h1 {
            color: #333;
            margin-bottom: 1rem;
            font-size: 2.2rem;
        }
        .article-content h2 {
            color: #667eea;
            margin: 2rem 0 1rem 0;
            font-size: 1.8rem;
        }
        .article-content h3 {
            color: #555;
            margin: 1.5rem 0 1rem 0;
            font-size: 1.4rem;
        }
        .article-content p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .article-content strong {
            color: #667eea;
        }
        .feature-image {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 1rem 0;
        }
        .download-steps {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 1.5rem 0;
        }
        .download-steps ol {
            margin-left: 1.5rem;
        }
        .download-steps li {
            margin-bottom: 0.5rem;
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            color: #667eea;
            margin-bottom: 1rem;
            border-bottom: 2px solid #667eea;
            padding-bottom: 0.5rem;
        }
        .rating-system {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            margin: 2rem 0;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star:hover,
        .star.active {
            color: #ffd700;
        }
        .rating-form {
            margin-top: 1rem;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        .submit-button {
            background: #667eea;
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .submit-button:hover {
            background: #5a6fd8;
        }
        .comments-section {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            margin: 2rem 0;
        }
        .comment {
            border-bottom: 1px solid #eee;
            padding: 1rem 0;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }
        .comment-author {
            font-weight: bold;
            color: #667eea;
        }
        .comment-date {
            color: #666;
            font-size: 0.9rem;
        }
        .footer-links {
            background: #e9ecef;
            padding: 2rem 0;
            margin-top: 2rem;
        }
        .web-link {
            display: inline-block;
            margin: 0.5rem 1rem;
            padding: 0.5rem 1rem;
            background: white;
            border-radius: 5px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: #667eea;
            text-decoration: none;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background: #333;
            color: white;
            text-align: center;
            padding: 2rem 0;
        }
        .footer-content {
            max-width: 800px;
            margin: 0 auto;
        }
        .text-center {
            text-align: center;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #a8edea 0%, #fed6e3 100%);
            padding: 2rem;
            border-radius: 10px;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 1rem;
            }
            .article-content {
                padding: 1rem;
            }
            .article-content h1 {
                font-size: 1.8rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: 5px;
                margin-bottom: 0.5rem;
            }
            .search-button {
                border-radius: 5px;
            }
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-in;
        }
        .interactive-card {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            transition: transform 0.3s, box-shadow 0.3s;
            cursor: pointer;
        }
        .interactive-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 20px rgba(0,0,0,0.15);
        }