* {
            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, #1e3c72 0%, #2a5298 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;
            padding: 0 20px;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
        }
        .logo a {
            color: white;
            text-decoration: none;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            padding: 8px 12px;
            border: none;
            border-radius: 4px;
            width: 250px;
        }
        .search-form button {
            background: #ff6b35;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #e55a2b;
        }
        nav {
            background: #2a5298;
            padding: 1rem 0;
        }
        .nav-desktop {
            display: flex;
            justify-content: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: background 0.3s;
        }
        .nav-desktop a:hover {
            background: rgba(255,255,255,0.1);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            background: #2a5298;
            padding: 1rem;
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav a {
            display: block;
            color: white;
            text-decoration: none;
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #6c757d;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: #495057;
        }
        main {
            padding: 2rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding: 2rem;
            background: white;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: #1e3c72;
            margin-bottom: 1rem;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.9rem;
        }
        .content-section {
            background: white;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .content-section h2 {
            color: #1e3c72;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
            border-left: 4px solid #ff6b35;
            padding-left: 1rem;
        }
        .content-section h3 {
            color: #2a5298;
            margin: 1.5rem 0 1rem 0;
            font-size: 1.4rem;
        }
        .content-section p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .highlight {
            background: #fff3cd;
            padding: 1rem;
            border-left: 4px solid #ffc107;
            margin: 1.5rem 0;
        }
        .feature-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .download-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }
        .step-card {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px solid #dee2e6;
        }
        .step-number {
            background: #ff6b35;
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-bottom: 1rem;
        }
        .interactive-box {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2rem;
            border-radius: 8px;
            margin: 2rem 0;
            text-align: center;
        }
        .cta-button {
            display: inline-block;
            background: #ff6b35;
            color: white;
            padding: 12px 24px;
            text-decoration: none;
            border-radius: 4px;
            font-weight: bold;
            margin-top: 1rem;
            transition: transform 0.3s, background 0.3s;
        }
        .cta-button:hover {
            background: #e55a2b;
            transform: translateY(-2px);
        }
        .comments-section {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .comment-form {
            margin-bottom: 2rem;
        }
        .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: 8px 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
        }
        .rating-system {
            display: flex;
            gap: 10px;
            align-items: center;
            margin-bottom: 1rem;
        }
        .star-rating {
            display: flex;
            gap: 5px;
        }
        .star {
            color: #ddd;
            cursor: pointer;
            font-size: 1.2rem;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .footer-links {
            background: #343a40;
            color: white;
            padding: 3rem 0;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: 4px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
        }
        .web-link a {
            color: white;
            text-decoration: none;
        }
        footer {
            background: #212529;
            color: white;
            text-align: center;
            padding: 2rem 0;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 1rem;
            }
            .search-form input {
                width: 200px;
            }
            .nav-desktop {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .download-steps {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .search-form {
                flex-direction: column;
                width: 100%;
            }
            .search-form input {
                width: 100%;
            }
            .content-section {
                padding: 1rem;
            }
        }