* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #0066cc;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #004d99;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(135deg, #0066cc, #004d99);
            color: white;
            padding: 12px 24px;
            border-radius: 30px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }
        .btn:hover {
            background: linear-gradient(135deg, #004d99, #003366);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        header {
            background-color: #1a237e;
            color: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: #ffcc00;
        }
        .search-form {
            flex-grow: 1;
            max-width: 500px;
            margin: 0 30px;
            position: relative;
        }
        .search-form input {
            width: 100%;
            padding: 12px 20px;
            border-radius: 30px;
            border: 2px solid #3949ab;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus {
            border-color: #ffcc00;
        }
        .search-form button {
            position: absolute;
            right: 5px;
            top: 5px;
            background: #3949ab;
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #ffcc00;
            color: #1a237e;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        nav {
            background-color: #3949ab;
            padding: 10px 0;
        }
        .nav-list {
            display: flex;
            list-style: none;
            justify-content: center;
            flex-wrap: wrap;
            gap: 25px;
        }
        .nav-list a {
            color: white;
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 20px;
            transition: all 0.3s;
        }
        .nav-list a:hover,
        .nav-list a.active {
            background-color: #ffcc00;
            color: #1a237e;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #e8eaf6;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 10px;
            color: #666;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        article {
            background-color: white;
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            margin-bottom: 40px;
        }
        h1 {
            color: #1a237e;
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            color: #3949ab;
            font-size: 2rem;
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid #ffcc00;
        }
        h3 {
            color: #5c6bc0;
            font-size: 1.6rem;
            margin: 30px 0 15px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 20px;
            border-left: 5px solid #ffcc00;
            border-radius: 0 10px 10px 0;
            margin: 25px 0;
        }
        .link-list {
            background-color: #f5f5f5;
            padding: 20px;
            border-radius: 10px;
            margin: 25px 0;
        }
        .link-list ul {
            list-style-type: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .link-list li {
            padding: 8px 0;
            border-bottom: 1px dashed #ccc;
        }
        .link-list li:last-child {
            border-bottom: none;
        }
        .link-list a {
            color: #1a237e;
            font-weight: 600;
        }
        .link-list a:hover {
            text-decoration: underline;
        }
        .feature-image {
            margin: 30px 0;
            text-align: center;
        }
        .feature-image img {
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            max-height: 500px;
            object-fit: cover;
            width: 100%;
        }
        .feature-image figcaption {
            margin-top: 10px;
            font-style: italic;
            color: #666;
        }
        .user-interaction {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .comment-section, .rating-section {
            background-color: #f8f9fa;
            padding: 25px;
            border-radius: 15px;
            border: 2px solid #e0e0e0;
        }
        .comment-section h3, .rating-section h3 {
            color: #1a237e;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px;
            border: 2px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #3949ab;
            outline: none;
        }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars .star:hover,
        .stars .star.active {
            color: #ffcc00;
        }
        footer {
            background-color: #1a237e;
            color: white;
            padding: 40px 0 20px;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: #ffcc00;
        }
        .footer-links h4 {
            color: #ffcc00;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #e8eaf6;
        }
        .footer-links a:hover {
            color: #ffcc00;
            padding-left: 5px;
            transition: all 0.3s;
        }
        friend-link {
            display: block;
            background-color: #3949ab;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 30px;
        }
        friend-link h4 {
            color: #ffcc00;
            margin-bottom: 15px;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        friend-link a {
            color: white;
            background-color: #5c6bc0;
            padding: 8px 16px;
            border-radius: 20px;
            font-weight: 600;
        }
        friend-link a:hover {
            background-color: #ffcc00;
            color: #1a237e;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #b0b0b0;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin: 15px 0 0;
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            nav {
                display: none;
                padding: 0;
            }
            nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 0;
            }
            .nav-list li {
                width: 100%;
                border-bottom: 1px solid #5c6bc0;
            }
            .nav-list a {
                display: block;
                padding: 15px 20px;
                border-radius: 0;
            }
            article {
                padding: 25px;
            }
            .user-interaction {
                grid-template-columns: 1fr;
            }
            friend-link ul {
                justify-content: center;
            }
        }