/*ベース*/
.toggle {
	display: none;
}
.Label {		/*タイトル*/
	display: block;
}

.Label::before{		/*タイトル横の矢印*/
	content:"";
	width: 6px;
	height: 6px;
	border-top: 2px solid #2E4FB5 ;
	border-right: 2px solid #2E4FB5 ;
	-webkit-transform: rotate(45deg);
	position: absolute;
	top:calc( 50% - 3px );
	right: 20px;
	transform: rotate(135deg);
}
.Label,
.explanation {
	-webkit-backface-visibility: hidden;
	backface-visibility: hidden;
	transform: translateZ(0);
	transition: all 0.3s;
}
.explanation {		/*本文*/
	height: 0;
	margin-bottom:10px;
	
	overflow: hidden;
}
.toggle:checked + .Label + .explanation {	/*開閉時*/
	height: auto;
	transition: all .3s;
}
.toggle:checked + .Label::before {
	transform: rotate(-45deg) !important;
}