.block-img-modal a {
  position: relative;
  display: inline-block;
}
.block-img-modal a::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 33px;
  height: 33px;
  background: url("../img/icon/zoom.svg") no-repeat top center;
  background-size: contain;
}
@media only screen and (max-width: 768px) {
  .block-img-modal a::after {
    width: 5.15625vw;
    height: 5.15625vw;
  }
}