* {
            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: #F9F9F9;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .header {
            background-color: #4A90E2;
            color: white;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: #FFD700;
            transition: color 0.3s ease;
        }
        .logo a:hover {
            color: #50C878;
        }
        .nav {
            display: flex;
            gap: 2rem;
        }
        .nav a {
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: background-color 0.3s ease, transform 0.2s ease;
        }
        .nav a:hover {
            background-color: #50C878;
            transform: translateY(-2px);
        }
        .breadcrumb {
            background-color: #E8F4FD;
            padding: 0.75rem 2rem;
            font-size: 0.9rem;
            color: #555;
        }
        .breadcrumb a {
            color: #4A90E2;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            flex: 1;
        }
        .content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        .article {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .article h1 {
            font-size: 2.8rem;
            color: #2C3E50;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article h2 {
            font-size: 2rem;
            color: #4A90E2;
            margin: 1.5rem 0 1rem;
            border-left: 5px solid #50C878;
            padding-left: 1rem;
        }
        .article h3 {
            font-size: 1.5rem;
            color: #333;
            margin: 1.2rem 0 0.8rem;
        }
        .article p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .article strong {
            color: #E74C3C;
            font-weight: 700;
        }
        .article em {
            color: #9B59B6;
            font-style: italic;
        }
        .article blockquote {
            border-left: 4px solid #FFD700;
            padding-left: 1.5rem;
            margin: 1.5rem 0;
            color: #555;
            font-style: italic;
            background-color: #FFFDE7;
            padding: 1rem;
            border-radius: 0 8px 8px 0;
        }
        .image-container {
            text-align: center;
            margin: 2rem 0;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease;
        }
        .image-container img:hover {
            transform: scale(1.02);
        }
        .caption {
            font-size: 0.95rem;
            color: #777;
            margin-top: 0.5rem;
        }
        .function-section {
            background-color: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            margin-bottom: 2rem;
        }
        .function-section h2 {
            color: #4A90E2;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #333;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #DDD;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #50C878;
            outline: none;
        }
        .btn {
            background-color: #4A90E2;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            font-size: 1rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background-color: #357ABD;
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.5rem;
            color: #DDD;
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: #FFD700;
        }
        .footer {
            background-color: #2C3E50;
            color: white;
            padding: 2rem;
            margin-top: auto;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background-color: #3A506B;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            transition: background-color 0.3s ease;
        }
        .web-link:hover {
            background-color: #50C878;
        }
        .web-link a {
            color: #FFD700;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4A6278;
            font-size: 0.9rem;
            color: #BDC3C7;
        }
        @media (max-width: 992px) {
            .nav {
                gap: 1rem;
            }
            .web-links {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header {
                flex-wrap: wrap;
                padding: 1rem;
            }
            .nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #4A90E2;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            }
            .nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .article h1 {
                font-size: 2.2rem;
            }
            .article h2 {
                font-size: 1.8rem;
            }
            .container {
                padding: 0 1rem;
            }
            .web-links {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .article {
                padding: 1.5rem;
            }
            .function-section {
                padding: 1.5rem;
            }
            .web-links {
                grid-template-columns: 1fr;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }