.introduction-container {
    background-image: url('/media/0b9707e6-d481-4bda-9615-e733d0654c9e.jpg');
    min-height:500px;
}

@media (min-width: 768px) {
 	 .introduction-container {
           	background-image: url('/media/9fbd1b44-6340-441e-8774-54af8b2a7cb9.jpg');
       		background-position:center center;
       		min-height:550px
	}
}