@media screen and (min-width: 481px){	
	.seminar_mobile{
		display:none;
	}
}
@media screen and (max-width: 480px){
	.seminar_desktop{
		display:none;
	}
	
	.seminar_mobile{
		display:block;
	}
	
	.seminar_img{
		text-align:center;
	}
}