.nav1{
    display: flex;list-style: none;
    text-align: center;
    justify-content: center;
}
.nav2{
    display: flex;list-style: none;
    text-align: center;
    justify-content: center;
}
.navm{
    display: none;
    
}
@media (max-width: 900px){
    .navb{
        display: none;
    }
    .navm{
        display: block;
        
    }
}

a{
    list-style: none;
    text-decoration: none;
}
a:hover{
    list-style: none;
    
}
.nav2 li{
    display: flex;
    height: 59px;
    align-items: center;
    font-size: 18px;
    font-family: 微软雅黑;
}
.nav1 li{
    display: flex;
    height: 59px;
    align-items: center;
    font-size: 16px;
    font-family: 微软雅黑;
}
.dibu{
    padding-left: 50px;
    color: white;
    list-style: none;
    margin-top: 50px;
}
.dibu li{
    display: block;
    margin-top: 20px;
    font-size: 16px;
}