.page-introduce{
  text-align: center;
}
.page-introduce a{
  display: inline-block;
  height: 40px;
  line-height: 40px;
  width: 30%;
  font-size: 16px;
}
.page-introduce a.active{
  background-color: #7a4040;
  color: white;
}
.page-content{
  padding-top: 20px;
  font-size: 14px;
}