@media (max-width: 1100px){
  .a_img_member_rainbow::after,
  .a_img_member_rainbow_bw::after {
    left: 4px;
    top: 4px;
    width: calc(100% - 8px);
    height: calc(100% - 8px);
  }
  .img_member_rainbow {
    left: 6px;
    top: 6px;
    width: calc(100% - 12px);
    height: calc(100% - 12px);
  }
}