/* flex布局 */
.u-f,.u-f-ac,.u-f-ajc{
	display: flex;
}
.u-f-ac,.u-f-ajc{
	align-items: center;
}
.u-f-ajc{
	justify-content: center;
}
.u-f-jsb{
	justify-content: space-between;
}
.u-f1{
	flex: 1;
}
.u-f2{
	flex: 2;
}
.u-f3{
	flex: 3;
}
.u-f-column{
	flex-direction: column;
}
.u-f-l{
	justify-content:flex-start;
}
.u-f-r{
	justify-content:flex-end;
}