@media (max-width: 1250px) {
	.main_logo{
		margin: 27px 0 21px 3px;
	}
}
@media (max-width: 1000px){
	a.main_logo {
		background: url(../images/designlogo/art_header.png) center no-repeat;
		background-size: contain;
		width: 116px;
		height: 44px;
	}
}
@media (max-width: 700px){
	a.main_logo {
		margin-bottom: 0;
	}
}