/* 菜单 */
.brief-menu {
  margin: 0 auto;
  width: 12rem;
  height: 50px;
}
.brief-menu-item {
  display: block;
  width: 2rem;
  height: 50px;
  line-height: 50px;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: #5C5E91;
  border: 2px solid #AAAAAB;
  background-color: #fff;
  cursor: pointer;
}

/* 内容 */
.brief-content {
  display: none;
}
#nav-warp-item4{
	display: none;
}
#nav-warp4:hover #nav-warp-item4{
	display: block;
}