@media screen and (min-width: 280px) {
 .img_case{
  width:97%;
 }
}

@media screen and (min-width: 320px) {
 .img_case{
  width:85%;
 }
}

@media screen and (min-width: 360px) {
 .img_case{
  width:88%;
 }
}

@media screen and (min-width: 412px) {
 .img_case{
  width:80%;
 }
}

@media screen and (min-width: 540px) {
 .img_case{
  width:63%;
 }
}

@media screen and (min-width: 717px) {
 .img_case{
  width:62%;
 }
}

@media screen and (min-width: 820px) {
 .img_case{
  width:55%;
 }
}

@media screen and (min-width: 912px) {
 .img_case{
  width:65%;
 }
}

@media screen and (min-width: 1024px) {
 .img_case{
  width:53%;
 }
}

@media screen and (min-width: 1280px) {
 .img_case{
  width:43%;
 }
}