body,html{
width: 100%;
height: 100%;
margin:0;
padding:0;
}
#part-one {
background: url(//marketing-kasamba.kassrv.com/content/Kasamba/kasamba-christmas-2018-DLPID-1080.jpg
) center no-repeat;
max-width: 100%;
width: 100%;
min-height: 236px;
background-size: 100% 100%;
margin: 0 auto;
}
@media only screen and (max-width:375px) {
#part-one{
background: url((//marketing-kasamba.kassrv.com/content/Kasamba/kasamba-christmas-2018-DLPID-750.jpg
) center no-repeat;
min-height:164px;
width: 100%;
margin: 0 auto;
background-size: 100% 100%;
}
}
@media only screen and (max-width:320px) {
#part-one{
background: url((//marketing-kasamba.kassrv.com/content/Kasamba/kasamba-christmas-2018-DLPID-6401.jpg
) center no-repeat;
min-height:140px;
width: 100%;
margin: 0 auto;
background-size: 100% 100%;
}
dlpid-promo_christmas_40%_20181220
test