* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-size: 16px;
}

i, em {
  font-style: normal;
}

a {
  text-decoration: none;
  color: #000;
}

ul, li {
  list-style: none;
}

.wrapper {
  width: 1268px;
  max-width: 1268px;
  margin: 0 auto;
}

/* flex布局 */
.flex {
	display: flex;
}

.basis-xs {
	flex-basis: 20%;
}

.basis-sm {
	flex-basis: 40%;
}

.basis-df {
	flex-basis: 50%;
}

.basis-lg {
	flex-basis: 60%;
}

.basis-xl {
	flex-basis: 80%;
}

.flex-sub {
	flex: 1;
}

.flex-twice {
	flex: 2;
}

.flex-treble {
	flex: 3;
}

.flex-direction {
	flex-direction: column;
}

.flex-wrap {
	flex-wrap: wrap;
}

.align-start {
	align-items: flex-start;
}

.align-end {
	align-items: flex-end;
}

.align-center {
	align-items: center;
}

.align-stretch {
	align-items: stretch;
}

.self-start {
	align-self: flex-start;
}

.self-center {
	align-self: flex-center;
}

.self-end {
	align-self: flex-end;
}

.self-stretch {
	align-self: stretch;
}

.align-stretch {
	align-items: stretch;
}

.justify-start {
	justify-content: flex-start;
}

.justify-end {
	justify-content: flex-end;
}

.justify-center {
	justify-content: center;
}

.justify-between {
	justify-content: space-between;
}

.justify-around {
	justify-content: space-around;
}