.fixed {
  position: fixed;
  top: 250px;
  right: 40px;
  bottom: 250px;
  z-index: 900;
  width: 50px;
  height: 200px;
  list-style: none;
  }
.fixed .lf-web {
  display: inline-block;
  width: 40px;
  height: 40px;
  margin-top: 10px;
  font-size: 25px;
  line-height: 40px;
  color: #fff;
  text-align: center;
  text-decoration: none;
  background: rgba(193, 193, 193, .5);
  border-radius: 50px;
  }
.fixed .lf-web:hover {
  text-decoration: none;
  background: #46bfdb;
  }