@media (max-width: 781px) {
  .mobile-reverse-columns {
    display: flex !important;
    flex-direction: column !important;
  }
  .mobile-reverse-columns > .wp-block-column:nth-child(1) {
    order: 2 !important;
  }
  .mobile-reverse-columns > .wp-block-column:nth-child(2) {
    order: 1 !important;
  }
}