@media all {

#ouyou div:first-child{
	width:40%;
	float:left;
}

#ouyou div:last-child{
	width:50%;
	float:right;
}

}

@media screen and (max-width:768px) {

#ouyou div{
	width:100% !important;
	float:none !important;
	margin:0 0 3em;
}

#ouyou div:first-child{
	text-align:center;
}

}