* {
            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: #ff6b35;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 25px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: #e55a2b;
        }
        nav {
            background: #2a5298;
            padding: 1rem 0;
        }
        .nav-menu {
            display: flex;
            justify-content: center;
            list-style: none;
            gap: 2rem;
        }
        .nav-menu a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-menu a:hover {
            color: #ff6b35;
        }
        .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: #6c757d;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: #495057;
        }
        main {
            padding: 2rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: #1e3c72;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .featured-image {
            width: 100%;
            max-width: 800px;
            margin: 0 auto 2rem;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .article-content {
            background: white;
            padding: 3rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .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;
            font-size: 1.4rem;
        }
        .content-section p {
            margin-bottom: 1rem;
            text-align: justify;
            line-height: 1.8;
        }
        .highlight-box {
            background: #e3f2fd;
            border-left: 4px solid #2196f3;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 5px 5px 0;
        }
        .step-guide {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .step {
            display: flex;
            align-items: flex-start;
            margin-bottom: 1.5rem;
            gap: 1rem;
        }
        .step-number {
            background: #ff6b35;
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
        }
        .interactive-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 3rem;
            border-radius: 10px;
            margin: 3rem 0;
            text-align: center;
        }
        .rating-system {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin: 2rem 0;
        }
        .rating-star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s, transform 0.2s;
        }
        .rating-star:hover {
            color: #ffd700;
            transform: scale(1.2);
        }
        .comment-form {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            margin-top: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #333;
            font-weight: 500;
        }
        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-control:focus {
            border-color: #667eea;
            outline: none;
        }
        .submit-btn {
            background: #ff6b35;
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 25px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        .submit-btn:hover {
            background: #e55a2b;
        }
        .footer-links {
            background: #343a40;
            color: white;
            padding: 3rem 0;
        }
        .web-link {
            background: #495057;
            margin: 1rem 0;
            padding: 1rem;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: #5a6268;
        }
        .web-link a {
            color: #ffd700;
            text-decoration: none;
            font-weight: 500;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background: #212529;
            color: white;
            text-align: center;
            padding: 2rem 0;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 1rem;
            }
            .search-input {
                width: 100%;
            }
            .hamburger {
                display: block;
            }
            .nav-menu {
                flex-direction: column;
                display: none;
                text-align: center;
            }
            .nav-menu.active {
                display: flex;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .interactive-section {
                padding: 2rem 1rem;
            }
            .rating-system {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 480px) {
            .step {
                flex-direction: column;
                text-align: center;
            }
            .step-number {
                align-self: center;
            }
        }