.pageul{
    justify-content: center;
}
.pageul :nth-child(n){
    width:30px;
    height:30px;
    cursor:pointer;
    margin-right:4px;
    text-align:center;
    border: 1px solid #666;
    flex:none;
    display:flex;
    align-items:center;
    justify-content:center;
    user-select:none;
}

.pageul .active_page{
    color:#fff !important;
    background-color:#999 !important;
}