.bnr_box {
  margin-top: 40px;
  padding-bottom: 40px;
}
.bnr_box a {
  transition: all 0.25s ease;
}
.bnr_box img {
  width: 100%;
}

@media screen and (max-width: 750px) {
  .bnr_box {
    margin-top: 20px;
    padding-bottom: 20px;
  }
  .bnr_box a {
    transition: all 0s ease;
  }
}