#mainvis {
  background-image: url("../img/gyousyu/lease/mvbg.png"), linear-gradient(#fff 74.53%, #d8f0ec 74.53%);
}

#mf1 .bgbox {
  padding-right: calc( 50% - 540px );
}

@media screen and (max-width: 850px) {
  #mainvis {
    background-image: url("../img/gyousyu/lease/mvbgs.jpg"), linear-gradient(#fff 25.5%, #d8f0ec 25.5%);
  }
}