#geunsukBanner {
  position: relative;
}

#geunsukBanner > a {
  display: block;
  z-index: -1;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}

#geunsukBanner > a img {
  width: 100%;
  height: auto;
}

#geunsukBanner > a.show {
  z-index: 10;
  position: relative;
  opacity: 1;
}