.image-background {
  position: relative;
  display: block;
  max-width: 720px;
  margin-right: auto;
  margin-left: auto;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
}
.image-background > img {
  opacity: 0;
  width: 100%;
  height: auto;
}

#bo_v_link {
  margin: 50px auto;
  text-align: center;
}