.background{ background: url('https://www.demo-idfacto.plateformehuissiers.fr/uploads/dreamstime_xxl_197064631_resized-mobile.jpg'); }
@media only screen and (min-width: 601px){.background{ background: url('https://www.demo-idfacto.plateformehuissiers.fr/uploads/dreamstime_xxl_197064631_resized.jpg');}}
.background{
	background-color: transparent;
	background-size:cover;background-repeat:no-repeat;
	-webkit-background-size: cover;
	background-position: center;
	background-attachment: fixed;
}