Hide Page Section Within Index Page on Mobile

Site URL: https://www.joquilter.art

Hi All, I'm trying to hide the logo section and title Who I've Worked With on this website on mobile devices. Haven't managed it yet.

Thanks for any help!

I've tried a few block and section ids but currently using this custom css code:

@media screen and (max-width: 640px) {
  #block-yui_3_17_2_1_1597015077596_71{
  display: none;
  }
}

@media screen and (max-width:640px) {
  [data-collection-id="5db7b6228af28129ea45bb3c"],
  [data-collection-id="5f1911e5eca2744d8bdada81"] {
    display: none;
  }
}