.nav .menu {
    width: 90%;}
.dhx {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    align-items: center;}
.dhx ul {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;}
.nav .menu ul li.on {
    background: url("https://www.metalnegro.com/__xh__/news.swjtu.edu.cn/img/dbx.png") no-repeat bottom center;}
.nav .menu .dhx ul li.stlm {
    height: 50px;}
.nav .menu .dhx ul li {
    width: auto;
    min-width: 57px;
    height: 30px;
    max-width: 115px;
    text-align: center;
    margin-bottom: 0;}
.nav .menu {
    margin-top: 0;}
@media screen and (max-width: 1140px) {
.nav .menu .dhx ul li {
    overflow: initial;
    white-space: normal;
    max-width: 88px;
    line-height: 22px;}
}