@media screen and (max-width:768px) {
	.trip_bg{
		background: url(../images/e-schoolfieldtrip/laicanjiakewai.jpg) 50% 130px no-repeat;
		height: 820px;
		margin-top: 60px;
		background-size: 1000px auto;
	}
}
@media screen and (min-width:769px) {
	.trip_bg{
		background: url(../images/e-schoolfieldtrip/laicanjiakewai.jpg) 50% 0px no-repeat;
		height: 1200px;
		margin-top: 60px;
	}
}
.xly_bt{
	margin:40px auto 20px auto;
}