body {
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  height: 100vh;
  height: 100svh;
}
img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.banner_landscape {
  display: block;
}
.banner_portrait {
  display: none;
}
@media screen and (orientation: portrait) {
  .banner_portrait {
    display: block;
  }
  .banner_landscape {
    display: none;
  }
}