.roll {
  position: relative;
  display: flex;
  overflow: hidden;
}
.roll span {
  display: inline-block;
  /* line-height: 20px; */
  text-align: center;
  overflow: hidden;
}
.roll span i {
  /* width: 20px; */
  /* height: 20px; */
  display: block;
  text-align: center;
  font-style: normal;
}