* {
            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, #1a237e 0%, #283593 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: 2rem;
            font-weight: bold;
            text-decoration: none;
            color: white;
        }
        .logo span {
            color: #ffd600;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            padding: 10px;
            border: none;
            border-radius: 5px;
            width: 300px;
        }
        .search-form button {
            background: #ffd600;
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            cursor: pointer;
            color: #1a237e;
            font-weight: bold;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        nav {
            background: rgba(255,255,255,0.1);
            margin-top: 1rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            justify-content: center;
        }
        .nav-links li {
            padding: 1rem 2rem;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            transition: color 0.3s;
        }
        .nav-links a:hover {
            color: #ffd600;
        }
        .breadcrumb {
            padding: 1rem 20px;
            background: #e8eaf6;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #1a237e;
            text-decoration: none;
        }
        main {
            padding: 2rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding: 2rem;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        h1 {
            color: #1a237e;
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        .article-meta {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .featured-image {
            width: 100%;
            max-width: 800px;
            height: 400px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
        }
        .content-section {
            background: white;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        h2 {
            color: #283593;
            margin: 2rem 0 1rem 0;
            border-left: 5px solid #ffd600;
            padding-left: 1rem;
        }
        h3 {
            color: #3949ab;
            margin: 1.5rem 0 1rem 0;
        }
        p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .highlight {
            background: #fff9c4;
            padding: 1rem;
            border-left: 4px solid #ffd600;
            margin: 1rem 0;
            border-radius: 0 5px 5px 0;
        }
        .download-section {
            background: linear-gradient(135deg, #e8eaf6 0%, #c5cae9 100%);
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            margin: 2rem 0;
        }
        .download-btn {
            display: inline-block;
            background: #1a237e;
            color: white;
            padding: 15px 30px;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            margin: 1rem;
            transition: transform 0.3s, background 0.3s;
        }
        .download-btn:hover {
            background: #283593;
            transform: translateY(-2px);
        }
        .rating-system {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star:hover,
        .star.active {
            color: #ffd600;
        }
        .comment-section {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .comment-form {
            display: grid;
            gap: 1rem;
            margin-top: 1rem;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-family: inherit;
        }
        .comment-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .submit-btn {
            background: #1a237e;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .submit-btn:hover {
            background: #283593;
        }
        .internal-links {
            background: #1a237e;
            color: white;
            padding: 2rem 0;
        }
        .web-link {
            display: inline-block;
            margin: 0.5rem 1rem;
        }
        .web-link a {
            color: #ffd600;
            text-decoration: none;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background: #0d1433;
            color: white;
            text-align: center;
            padding: 2rem 0;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 1rem;
            }
            .search-form input {
                width: 200px;
            }
            .mobile-menu-btn {
                display: block;
                position: absolute;
                top: 1rem;
                right: 1rem;
            }
            .nav-links {
                flex-direction: column;
                display: none;
            }
            .nav-links.active {
                display: flex;
            }
            h1 {
                font-size: 2rem;
            }
            .featured-image {
                height: 250px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 10px;
            }
            .content-section {
                padding: 1rem;
            }
            .download-btn {
                padding: 12px 20px;
                margin: 0.5rem;
            }
        }