.mobile-only {
    display: none;
  }
  
  @media screen and (max-width: 750px) {
    .desktop-only {
      display: none;
    }
  
    .mobile-only {
      display: unset;
    }

    #campaign main[data-template=multi-story] section#content div.copy-block[data-copy-block-position="0"] h2 {
      font-size: 16px;
      line-height: 24px;
    }
  }