MiniPrograms_Activity/components/tab/tab.wxss

/* components/tab/tab.wxss */
.Tab{
  overflow-y: hidden;
  overflow-x: scroll;
  white-space: nowrap;
  font-size: 16px;
  font-weight: 400;
  background-color: #20223b;
  -webkit-overflow-scrolling: touch;
}
.Tab .tabItem{
  display: inline-block;
  padding: 10px 15px;
}
.Tab .item{
  border-bottom: 2px solid #20223b;
  padding-bottom: 2px;
}
.Tab .active .item{
  border-bottom-color:red;
  color: red;
  padding-bottom: 2px;
}