.nav{
    width: 100%;
    height: .45rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index:3000;
    margin-top:-.04rem;
    background-color: #fff;
}
.van-tabs{
    width: 100%;
    border-bottom: 1px solid #ccc;
}
.van-tabs__line{
    width: 0.55rem;
    height: 0.06rem;
    background-color: #E4412B;
    border-radius: 0.03rem;
}
.van-tab--active span {
    color: #C29338;
}