#explan0{
	width: 600px;
	padding: 50px;
}

#explan1{
	width: 100%;
}

#explan1 > div:nth-child(3) > a:nth-child(3){
	visibility: hidden;
}

#explan2{
	width: 100%;
}

#explan2 > div:nth-child(3) > a:nth-child(3){
	visibility: hidden;
}

#explan3{
	width: 100%;
}

#explan3 > iframe:nth-child(3){
	display: block;
	margin-top: 50px;
	margin-bottom: 50px;
	margin-right: auto;
	margin-left: auto;
}

@media screen and (max-width: 1100px){
	#explan1 > div:nth-child(3) > a:nth-child(3){
		display: none;
	}

	#explan2 > div:nth-child(3) > a:nth-child(3){
		display: none;
	}

	#explan3 > iframe:nth-child(3){
		width: 280px;
		height: 200px;
	}
}