@media only screen and (min-width: 768px) {
  .mobile_only{
  	display:none;
  }
}
@media only screen and (max-width: 767px) {
  
  .pc_only{
  	display:none;
  }
  
  .contents_textarea dt{
	float:none;
	display:block;
	width:100%;
	background-color:#bfd6e4;
  }
  .contents_textarea dd{
	display:block;
	margin:0;
  }
  li.seminarList{
  	padding: 10px 0;
  }
}