* {
            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;
            padding-top: 80px; 
        }
        a {
            text-decoration: none;
            color: #007bff;
        }
        a:hover {
            color: #0056b3;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: white;
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 700;
            color: #00d4ff;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 10px;
            color: #ff4757;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        nav ul li a {
            color: white;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: background 0.3s ease;
        }
        nav ul li a:hover {
            background: rgba(255, 255, 255, 0.2);
            text-decoration: none;
        }
        .breadcrumb {
            background: #2d3748;
            padding: 10px 20px;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #a0aec0;
        }
        .breadcrumb a:hover {
            color: white;
        }
        .breadcrumb span {
            color: #cbd5e0;
            margin: 0 5px;
        }
        main {
            background: white;
            padding: 30px;
            margin: 20px auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        article h1 {
            font-size: 2.5rem;
            color: #1a202c;
            margin-bottom: 20px;
            border-bottom: 3px solid #00d4ff;
            padding-bottom: 10px;
        }
        article h2 {
            font-size: 2rem;
            color: #2d3748;
            margin: 30px 0 15px;
            padding-left: 10px;
            border-left: 5px solid #ff4757;
        }
        article h3 {
            font-size: 1.5rem;
            color: #4a5568;
            margin: 20px 0 10px;
        }
        article p {
            margin-bottom: 1.2em;
            font-size: 1.1rem;
            text-align: justify;
        }
        article strong {
            color: #2d3748;
            font-weight: 700;
        }
        article em {
            color: #e53e3e;
            font-style: italic;
        }
        .highlight {
            background: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 5px 5px 0;
        }
        .image-container {
            margin: 25px 0;
            text-align: center;
        }
        .image-container img {
            border-radius: 8px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
        }
        .image-container figcaption {
            font-size: 0.9rem;
            color: #718096;
            margin-top: 10px;
        }
        .feature-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .feature {
            background: #f1f8ff;
            border: 1px solid #cce5ff;
            border-radius: 8px;
            padding: 20px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 123, 255, 0.15);
        }
        .feature h3 {
            color: #0056b3;
            margin-top: 0;
        }
        .feature form {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feature input, .feature textarea, .feature select {
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 1rem;
        }
        .feature button {
            background: #007bff;
            color: white;
            border: none;
            padding: 12px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .feature button:hover {
            background: #0056b3;
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 1.5rem;
            color: #ccc;
            cursor: pointer;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffc107;
        }
        .footer-links {
            background: #2d3748;
            padding: 30px 20px;
            margin-top: 40px;
        }
        .web-link {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 15px;
            background: #4a5568;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: #718096;
        }
        .web-link a {
            color: #e2e8f0;
            font-weight: 500;
        }
        .web-link a:hover {
            text-decoration: none;
            color: white;
        }
        footer {
            background: #1a202c;
            color: #a0aec0;
            text-align: center;
            padding: 20px;
            font-size: 0.9rem;
        }
        footer p {
            margin: 5px 0;
        }
        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #1a1a2e;
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.2);
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 10px 0;
            }
            article h1 {
                font-size: 2rem;
            }
            article h2 {
                font-size: 1.7rem;
            }
            .feature-box {
                grid-template-columns: 1fr;
            }
            .header-top {
                padding: 10px 15px;
            }
            .logo a {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            main {
                padding: 20px;
            }
            article h1 {
                font-size: 1.8rem;
            }
        }