* {
            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-input {
            padding: 10px 15px;
            border: none;
            border-radius: 25px;
            width: 300px;
            font-size: 1rem;
        }
        .search-btn {
            background: #ff6b6b;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 25px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: #ff5252;
        }
        nav {
            background: #2a5298;
            padding: 0 20px;
        }
        .nav-desktop {
            display: flex;
            list-style: none;
        }
        .nav-desktop li {
            position: relative;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            padding: 15px 20px;
            display: block;
            transition: background 0.3s;
        }
        .nav-desktop a:hover {
            background: rgba(255,255,255,0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #2a5298;
            position: absolute;
            width: 100%;
            z-index: 1000;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            padding: 15px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            padding: 15px 20px;
            background: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #6c757d;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 40px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: #1e3c72;
            margin-bottom: 20px;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .content-section {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
        }
        .content-section h2 {
            color: #1e3c72;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e9ecef;
        }
        .content-section h3 {
            color: #2a5298;
            margin: 25px 0 15px;
        }
        .content-section p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .content-section ul, .content-section ol {
            margin-bottom: 20px;
            padding-left: 30px;
        }
        .content-section li {
            margin-bottom: 10px;
        }
        .highlight {
            background: #fff3cd;
            padding: 15px;
            border-left: 4px solid #ffc107;
            margin: 20px 0;
            border-radius: 0 5px 5px 0;
        }
        .feature-image {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 20px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .interactive-box {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 30px;
            border-radius: 10px;
            margin: 30px 0;
            text-align: center;
        }
        .interactive-box h3 {
            color: white;
            margin-bottom: 15px;
        }
        .btn {
            display: inline-block;
            background: #ff6b6b;
            color: white;
            padding: 12px 25px;
            border-radius: 25px;
            text-decoration: none;
            font-weight: bold;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .user-interaction {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-top: 40px;
        }
        .rating-section, .comment-section {
            margin-bottom: 30px;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 15px 0;
        }
        .star {
            color: #ffc107;
            font-size: 1.5rem;
            cursor: pointer;
            transition: transform 0.2s;
        }
        .star:hover {
            transform: scale(1.2);
        }
        .comment-form textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            margin-bottom: 15px;
            font-family: inherit;
            resize: vertical;
            min-height: 120px;
        }
        .comment-form button {
            background: #28a745;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 25px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .comment-form button:hover {
            background: #218838;
        }
        .footer-links {
            background: #343a40;
            padding: 40px 0;
            color: white;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
            margin-bottom: 30px;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            padding: 15px;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
        }
        .web-link a {
            color: #e9ecef;
            text-decoration: none;
        }
        .web-link a:hover {
            color: white;
            text-decoration: underline;
        }
        footer {
            background: #212529;
            color: white;
            text-align: center;
            padding: 20px 0;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 15px;
            }
            .search-input {
                width: 100%;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .content-section {
                padding: 20px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 10px;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 15px;
            }
        }