.about-doc__items {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1fr 1fr;
  grid-template-columns: 1fr 1fr 1fr;
  grid-gap: 20px;
}
@media only screen and (max-width: 991px) {
  .about-doc__items {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }
}