@charset "UTF-8";
.concept_img {
	padding: 40px 15px;
	background: url(../concept/img/bg-corner-tl.png) top left no-repeat,
				url(../concept/img/bg-corner-tr.png) top right no-repeat,
				url(../concept/img/bg-corner-bl.png) bottom left no-repeat,
				url(../concept/img/bg-corner-br.png) bottom right no-repeat;
}
.concept_img ul {
	overflow: hidden;
	width: 100%;
	margin: 0 auto;
	box-sizing: border-box;
	padding-left: 4%;
}
.concept_img li {
	float: left;
	width: 27%;
}
.concept_img li:nth-child(2n) {
	margin: 16% -9% 0;
}
.concept_img li img {
	vertical-align: bottom;
	max-width: 100%;
	height: auto;
}
.ltIE8 .concept_img li img {
	height: 158px;
}
.concept_img__text{
	text-align: center;
	margin-top: 25px;
	line-height: 1.8;
}

/* All SP & Tablet */
@media screen and (max-width:1000px) {
}

/* All SP */
@media screen and (max-width:640px) {
	.concept_img{
		padding: 40px 10px 60px;
	}
	.concept_img li {
		width: 36%;
	}
	.concept_img li:nth-child(2n) {
		margin: 29% -15% 0;
	}
	.concept_img li:nth-child(2n+1) {
		margin: 0px -4%;
	}
}