@media screen and (min-width: 1600px) {
  body.app-body.layout-single-column {
    background-image: url(https://cdn.yamabi.co/site_uploads/files/000/000/002/original/kyoukogyate.png);
    background-repeat: no-repeat;
    background-position: left bottom;
    background-attachment: fixed;
    background-size: 10%;
  }
}