/*-- header --*/
.top-head{
  height: 100%;
  background: url(img-c/top-image_01.jpg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  align-items: center;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  justify-content: center;
}

@media screen and (orientation: portrait){
  .top-head{
    height: 100%;
    background: url(img-c/top-image_01_.jpg);
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    align-items: center;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: center;
  }
}