@media (max-width: 767px) {
  .mobile-only-image {
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100vw !important;
    text-align: center;
  }

  .mobile-only-image img {
    width: 100vw !important;
    height: auto;
    margin: 0 !important;
    padding: 0 !important;
    display: block;
  }
}