.responsive {
  width: 100%;
  height: auto;
}
.mySlides {display:none;}

@media (max-width:480px){.pc{visibility:hidden;display:none;}
.mob{visibility:visible;display:block;}
}
@media (min-width:481px){.mob{visibility:hidden;display:none;}
.pc{visibility:visible;display:block;}
}