.col-100{
    width: 100%;
    display: flex;
    justify-content: center;
    justify-items: center;
    align-items: center;
}
.col-50{
    width: 50%;
}
.center-flex{
    display: flex;
    justify-content: center;
    justify-items: center;
    align-items: center;
}
.cauhoi_seo_quang{
    line-height: 0.9em;
}