.introduction-container {
    background-image: url('/media/11d6bc35-23f8-4556-9ef3-4071b070d388.jpg');
    min-height:500px;
}

@media (min-width: 768px) {
 	 .introduction-container {
           	background-image: url('/media/90fa8c9d-816b-45b8-baca-a19f307c1afd.jpg');
       		background-position:center center;
       		min-height:550px
	}
}