.oc__block.oc__block__full-screen-hero {
  position: relative;

  height: 60vw;

  background-size: cover;
  background-position: 50% 50%;
}

@media (min-width: 960px) {
  .oc__block.oc__block__full-screen-hero {
    height: 100vh;
    background-attachment: fixed;
  }
}