*{
    margin: 0;
    padding: 0;
}

.lap{
    display: block;
    width: 100%;
}
.tab{
    display: none;
}
.mob{
    display: none;
}

@media screen and (max-width: 900px) {
    .lap{
        display: none;
    }
    .tab{
        display: block;
        width: 100%;
    }
    .mob{
        display: none;
    }
}

@media screen and (max-width: 500px) {
    .lap{
        display: none;
    }
    .tab{
        display: none;
    }
    .mob{
        display: block;
        width: 100%;
    }
}