@media screen and (min-width: 280px) {
 .img_case{
  width:98%;
 }
}

@media screen and (min-width: 320px) {
 .img_case{
  width:86%;
 }
}

@media screen and (min-width: 360px) {
 .img_case{
  width:89%;
 }
}

@media screen and (min-width: 412px) {
 .img_case{
  width:81%;
 }
}

@media screen and (min-width: 540px) {
 .img_case{
  width:64%;
 }
}

@media screen and (min-width: 717px) {
 .img_case{
  width:63%;
 }
}

@media screen and (min-width: 820px) {
 .img_case{
  width:56%;
 }
}

@media screen and (min-width: 912px) {
 .img_case{
  width:66%;
 }
}

@media screen and (min-width: 1024px) {
 .img_case{
  width:54%;
 }
}

@media screen and (min-width: 1280px) {
 .img_case{
  width:44%;
 }
}