body{background-size:240%;}
@media (min-width:1200px) and (max-width:1499px) {
    body{background-size:350%!important;}
}
@media (min-width:992px) and (max-width:1199px) {
    body{background-size:530%!important;}
}
@media (min-width:768px) and (max-width:991px) {
    body{background-size:780%!important;}
}
@media (max-width:767px) {
    body{background-size:1240%;}
}