@media only screen and (min-width: 0px) and (max-width: 1200px) {
	.box_area{
		width: calc(50% - 30px);
	}
}
@media only screen and (min-width: 0px) and (max-width: 680px) {
	.box_area{
		width: calc(100% - 30px);
	}
}