.tongda_contact_map {
  width: 100%;
  aspect-ratio: 12 / 5;
  min-height: 25rem;
  line-height: 0;
  overflow: hidden;
}

.tongda_contact_map,
.tongda_contact_map * {
  box-sizing: border-box;
}

.tongda_contact_map_iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

@media screen and (max-width: 768px) {
  .tongda_contact_map {
    aspect-ratio: 4 / 3;
    min-height: 20rem;
  }
}