* {
            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: inherit;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 10px 20px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        .btn:hover {
            background-color: #45a049;
        }
        .section {
            padding: 40px 0;
        }
        header {
            background-color: #1a237e;
            color: white;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: #ffeb3b;
        }
        .nav-menu {
            display: flex;
            gap: 30px;
        }
        .nav-menu a {
            padding: 10px;
            transition: color 0.3s;
        }
        .nav-menu a:hover {
            color: #ffeb3b;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #e8eaf6;
            padding: 10px 20px;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 10px;
            color: #666;
        }
        .main-content {
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            padding: 30px;
            margin: 20px auto;
        }
        .article-header {
            text-align: center;
            margin-bottom: 30px;
            border-bottom: 2px solid #1a237e;
            padding-bottom: 20px;
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: #1a237e;
            margin-bottom: 10px;
        }
        .article-meta {
            color: #666;
            font-size: 0.9rem;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-body {
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .article-body p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .article-body h2 {
            color: #1a237e;
            margin: 30px 0 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid #e0e0e0;
        }
        .article-body h3 {
            color: #3949ab;
            margin: 20px 0 10px;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 15px;
            border-left: 4px solid #ffeb3b;
            margin: 20px 0;
            border-radius: 5px;
        }
        .image-container {
            text-align: center;
            margin: 30px 0;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin: 0 auto;
        }
        .image-caption {
            font-size: 0.9rem;
            color: #666;
            margin-top: 10px;
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 40px 0;
        }
        .feature-box {
            background-color: #f5f5f5;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .feature-box h3 {
            color: #1a237e;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feature-box form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .feature-box input, .feature-box textarea, .feature-box select {
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            width: 100%;
        }
        .feature-box textarea {
            min-height: 100px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.5rem;
            color: #ffc107;
            cursor: pointer;
        }
        .star-rating i {
            transition: transform 0.2s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .footer-links {
            background-color: #e8eaf6;
            padding: 30px 20px;
        }
        .web-link {
            margin-bottom: 15px;
        }
        .web-link a {
            color: #1a237e;
            font-weight: 500;
            transition: color 0.3s;
        }
        .web-link a:hover {
            color: #ff5722;
            text-decoration: underline;
        }
        footer {
            background-color: #1a237e;
            color: white;
            text-align: center;
            padding: 20px;
        }
        .footer-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .copyright {
            font-size: 0.9rem;
            opacity: 0.9;
        }
        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #1a237e;
                position: absolute;
                top: 70px;
                left: 0;
                padding: 20px;
                gap: 15px;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .nav-menu.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .features {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.8rem;
            }
            .main-content {
                padding: 20px;
            }
        }