.pub-container {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}

.pub-block {
    width: 100%;
}

/* Die beiden Bereiche nebeneinander */
.pubswitch {
    flex: 0 0 70%;
}

.pubswitch2 {
    flex: 0 0 30%;
   
}

/* Responsive Verhalten wie bei dir */
@media only screen and (max-width: 1024px) {
    .pubswitch {
        flex: 0 0 100%;
    }
    .pubswitch2 {
        flex: 0 0 100%;
        padding-left: 0;
    }
}