* {
            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;
        }
        .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);
        }
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: bold;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: #ff6b6b;
        }
        .nav {
            display: flex;
            gap: 2rem;
        }
        .nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }
        .nav a:hover {
            color: #ff6b6b;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #495057;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: #1e3c72;
        }
        .search-section {
            background: white;
            padding: 2rem;
            margin: 2rem auto;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #1e3c72;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-btn {
            background: #1e3c72;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .search-btn:hover {
            background: #2a5298;
        }
        .main-content {
            background: white;
            padding: 3rem;
            margin: 2rem auto;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .article-header h1 {
            color: #1e3c72;
            font-size: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.9rem;
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .featured-image {
            width: 100%;
            max-width: 800px;
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.3s ease;
        }
        .featured-image img:hover {
            transform: scale(1.02);
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .content-section h2 {
            color: #1e3c72;
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e9ecef;
        }
        .content-section h3 {
            color: #2a5298;
            font-size: 1.4rem;
            margin: 1.5rem 0 1rem 0;
        }
        .content-section p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight {
            background: #fff3cd;
            padding: 1.5rem;
            border-left: 4px solid #ffc107;
            margin: 2rem 0;
            border-radius: 5px;
        }
        .tip-box {
            background: #d1ecf1;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border-left: 4px solid #0dcaf0;
        }
        .tip-box h4 {
            color: #055160;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .download-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .step-card {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #e9ecef;
        }
        .step-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .step-number {
            background: #1e3c72;
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem auto;
            font-size: 1.5rem;
            font-weight: bold;
        }
        .rating-section {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            text-align: center;
        }
        .rating-stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .rating-form {
            max-width: 500px;
            margin: 2rem auto 0 auto;
        }
        .form-group {
            margin-bottom: 1.5rem;
            text-align: left;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }
        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid #ced4da;
            border-radius: 5px;
            font-size: 1rem;
        }
        .btn {
            background: #1e3c72;
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s ease;
        }
        .btn:hover {
            background: #2a5298;
        }
        .comments-section {
            margin: 4rem 0;
        }
        .comment-form {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin-bottom: 3rem;
        }
        .comment {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            border-left: 4px solid #1e3c72;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 1rem;
            font-size: 0.9rem;
            color: #6c757d;
        }
        .web-links {
            background: #e9ecef;
            padding: 3rem 0;
        }
        .web-link {
            display: inline-block;
            margin: 0.5rem 1rem 0.5rem 0;
            padding: 8px 15px;
            background: white;
            border-radius: 20px;
            text-decoration: none;
            color: #495057;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .web-link:hover {
            background: #1e3c72;
            color: white;
            transform: translateY(-2px);
        }
        .footer {
            background: #343a40;
            color: white;
            padding: 3rem 0 2rem 0;
            text-align: center;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #ff6b6b;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: #ff6b6b;
        }
        .copyright {
            border-top: 1px solid #495057;
            padding-top: 2rem;
            color: #adb5bd;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #1e3c72;
                padding: 1rem;
                box-shadow: 0 5px 10px rgba(0,0,0,0.1);
            }
            .nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .main-content {
                padding: 2rem 1rem;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: 5px;
                margin-bottom: 10px;
            }
            .search-btn {
                border-radius: 5px;
            }
        }
        @media (max-width: 480px) {
            .logo {
                font-size: 1.5rem;
            }
            .article-header h1 {
                font-size: 1.7rem;
            }
            .content-section h2 {
                font-size: 1.5rem;
            }
            .step-card {
                padding: 1.5rem;
            }
        }