.nav-wrap {
    display: flex;
    justify-content: space-between;
    height: 2.4rem;
    background: #222;
    color: #fff;
}

.nav-wrap li {
    width: 33.33%;
    line-height: 2.4rem;
    border-right: 1px solid #666;
    font-size: 0.7rem;
}

.nav-wrap li.act {
    background: #ff5c4a;
}