- Acme Themes
#12906
acmethemes
Keymaster

Hello megnaude,
Please add the below css codes on Appearance > Customize > Additional CSS

@media only screen and (max-width: 640px)
.lead {
    font-size: 18px !important;
    width: 100% !important;
}

Hope, this will solve your problem.
Let us know, if you have any other confusion.

Regards
Acme Supports