Change Header Picture on Weblog Submit for Cellular View

I want to make use of a special header picture for a particular weblog submit.
https://staging3.ryanlawn.com/weblog/ryan-lawn-tree-named-to-the-great-game-of-business-2021-all-star-team/

I’ve tried totally different CSS variations, however to no avail.

@media (max-width: 767px) {
  .post-id-41012 .page-banner bg {
    background-image: url('https://staging3.ryanlawn.com/wp-content/uploads/2021/09/ggob-blog-banner-all-star-2021-m.jpg') !necessary;
  }
}

Thanks upfront for any options.