.wp-block-acf-imagem-adaptavel {
    display:block;
    width:100%;
    height:100%;
    position: relative;
    padding-bottom: 40%;
}

.wp-block-acf-imagem-adaptavel img {
    width:100%;
    height:100%;
    object-fit:cover;
    object-position:center;
    position: absolute;
    top:0;
    left:0;
}

@media (max-width:767px) {
  .wp-block-acf-imagem-adaptavel {
      height:auto;
      padding-bottom: 0;
  }
  .wp-block-acf-imagem-adaptavel img {
      height:auto;
      aspect-ratio: 16/9;
      position: static;
  }
}