.br_text{
  text-align: center;
  margin-top: calc(61/1280*100vw);
  margin-bottom: calc(48/1280*100vw);
  font-family: source-han-selif-japanese, serif;
  font-size: 26px;
}

.iframe_box{
  display: flex;
  justify-content: center;
  padding-bottom: calc(160/1280*100vw);
}
.res_iframe_box{
  display: none;
}

@media (max-width:770px) {
  .iframe_box{
    display: none;
  }
  .res_iframe_box{
    display: flex;
    justify-content: center;
    padding-bottom: calc(80/360*100vw);
  }
  .br_text {
    margin-top: calc(21/360*100vw);
    margin-bottom: calc(18/360*100vw);
    font-size: 18px;
  }
}