.nav>ul>li {
    float: left;
    width: 20%;
    height: 70px;
    text-align: center;
    position: relative;}
.lilun>ul>li {
    float: left;
    width: 18%;
    line-height: 30px;
    padding: 0 2%;

    border: none;
    position: relative;}
.lilun>ul>li:hover{
    background: none;
    border:none;}.lilun>ul>li:hover a{
    color: #333;}
.lilun>ul>li::after {
    content: "";
    position: absolute;
    width: 4px;
    height: 22px;
    background: #b5282e;
    left: 5px;
    top: 50%;
    transform: translateY(-50%);
    float: left;}