/*
 * @Author: shu binqi 
 * @Date: 2020-07-03 17:21:06 
 * @Last Modified by: shu binqi
 * @Last Modified time: 2020-07-03 17:24:48
 */
.nav>ul li {
  margin: 0 15px;
}
.nav>ul li>a {
  padding: 0 25px;
}
.nav>ul li>a:hover{
  color: #004da3;
  background: transparent;
}
.nav>ul li>a:before {
  content: "";
  position: absolute;
  z-index: -1;
  left: 50%;
  right: 50%;
  bottom: 0;
  background: #102796;
  height: 3px;
  -webkit-transition-property: left,right;
  transition-property: left,right;
  -webkit-transition-duration: .3s;
  transition-duration: .3s;
  -webkit-transition-timing-function: ease-out;
  transition-timing-function: ease-out;
}
.nav>ul li>a:hover:before {
  left: 0;
  right: 0;
}