/* roulang page: index */
body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
            color: #333;
        }
        .container {
            width: 80%;
            margin: 20px auto;
            background-color: #fff;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }
        h1 {
            text-align: center;
            color: #007bff;
        }
        p {
            line-height: 1.6;
        }
        .features {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-around;
            margin-top: 20px;
        }
        .feature-card {
            width: 300px;
            margin-bottom: 20px;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            text-align: center;
            background-color: #f9f9f9;
        }
        .feature-card img {
            max-width: 100px;
            margin-bottom: 10px;
        }
        .contact-form {
            margin-top: 30px;
            padding: 20px;
            border: 1px solid #ddd;
            border-radius: 8px;
            background-color: #f9f9f9;
        }
        .contact-form label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        .contact-form input[type="text"],
        .contact-form input[type="email"],
        .contact-form textarea {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
        }
        .contact-form button {
            background-color: #007bff;
            color: white;
            padding: 12px 20px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
        }
        .contact-form button:hover {
            background-color: #0056b3;
        }