.banner {
  margin: 70px auto;
  width: -webkit-fit-content;
  width: -moz-fit-content;
  width: fit-content;
}
@media screen and (max-width: 767px) {
  .banner {
    margin: 10.6666666667vw auto;
  }
}
.banner a {
  display: block;
  -webkit-transition: 0.3s;
  transition: 0.3s;
}
.banner a:hover {
  opacity: 0.7;
}
.banner img {
  display: block;
  height: auto;
  max-width: 100%;
}
@media screen and (max-width: 767px) {
  .banner img {
    width: 100%;
  }
}