Hey,
we put into custom CSS the following Code. We had changed it a bit because the one your sent was not correct according to wordpress. Moreover in your screenshot the padding is still not the same. The first line to not start at the same point than line second 2 and 3, maybe 1 px earlier.
@media (max-width: 768px)
{ .fbc-page .fbc-wrap .fbc-items {padding: 0px 23px;}
}
@media (max-width: 768px)
{ .fbc-page .fbc-wrap .fbc-items li:first-child{padding-left: 0px;}
}