/* 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-f-fc {
	flex-direction: column;
}
.u-f-ww{
	flex-wrap: wrap;
}