:host {
  display: block;
}
.gls-menu-demo {
  border-bottom: 1px solid #e6e6e6;
  list-style: none;
  position: relative;
  margin: 0;
  padding-left: 0;
  background-color: #fff;
  padding-left: 30px;
}

.gls-menu-demo::before {
  content: '';
  display: table;
}
.gls-menu-demo::after {
  content: '';
  display: table;
  clear: both;
}
.gls-menu-item {
  float: left;
  height: 60px;
  line-height: 60px;
  margin: 0;
  font-size: 14px;
  color: #909399;
  padding: 0 15px;
  list-style: none;
  cursor: pointer;
  position: relative;
  transition: border-color 0.3s, background-color 0.3s, color 0.3s;
  box-sizing: border-box;
  white-space: nowrap;
}

.gls-menu-item.active {
  border-bottom: 2px solid #f91;
  color: #f91;
}