section{
	position:absolute;
	z-index:90;
	left:350px;

}

.concept_l{
	width:250px;
	font-family: "Times New Roman" , "游明朝" , "Yu Mincho" , "游明朝体" , "YuMincho" , "ヒラギノ明朝 Pro W3" , "Hiragino Mincho Pro" , "HiraMinProN-W3" , "HGS明朝E" , "ＭＳ Ｐ明朝" , "MS PMincho" , serif;
	/*height:600px;*/
	float:left;
	font-size:24px;
}

.concept_r{
	max-width:1200px;
	float:left;
	line-height:1.8em;
	padding:20px;
	box-sizing:border-box;
	background:rgba(255,255,255,0.5)
}
.concept_r iframe{
	max-width:100%;
}