Make slider full resopnsive on mobile with DVI theme wordpress

@media screen and (max-width:900px)
{
.et_pb_fullwidth_slider_0 .et_pb_slide {
background-size: contain!important;
height: 250px !important;
}
 
}
 
@media screen and (max-width:479px)
{
.et_pb_fullwidth_slider_0 .et_pb_slide {
background-size: contain!important;
height: 110px !important;
}
 
}