.nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #fff;
  border-top: 1px solid #eee;
}
.nav a {
  position: relative;
  float: left;
  width: 20%;
}
.nav a i {
  display: block;
  height: 30px;
  text-align: center;
  line-height: 30px;
}
.nav a .icon-shouye {
  font-size: 24px;
}
.nav a .icon-mendian {
  font-size: 24px;
}
.nav a .icon-qiche {
  font-size: 24px;
}
.nav a .icon-gouwuche {
  font-size: 26px;
}
.nav a .icon-wode {
  font-size: 20px;
}
.nav a span {
  display: block;
  height: 20px;
  color: #444;
  font-size: 14px;
  text-align: center;
  line-height: 15px;
}
#buy-tag {
  display: none;
  position: absolute;
  top: 3px;
  right: 23px;
  width: 11px;
  height: 11px;
  background: #fe5252;
  border-radius: 50%;
}
.global-num {
  position: absolute;
  top: 0;
  right: 20%;
  color: #fff;
  text-align: center;
  font-weight: normal;
  font-size: 12px;
  width: 18px;
  height: 18px;
  line-height: 18px;
  background: #fe5252;
  border-radius: 50%;
  -webkit-border-radius: 50%;
}