*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color:rgba(0,0,0,0);
  -webkit-tap-highlight-color: transparent;
  outline:none;
}

body{
  font-family: PingFangSC-Regular, Helvetica, Arial, Microsoft Yahei, sans-serif;
  font-size: 14px;
}

ul,
ol {
  list-style: none;
}

a{
  text-decoration: none;
}

.flex {
  display: flex;
}

.flex1 {
  flex: 1;
}

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

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

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

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

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

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

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

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

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

.row-reverse {
  flex-direction: row-reverse;
}

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