.wp-block-heading.about-heading {
    text-align: center;
    font-size: 72px;
 }


@media screen and (min-width: 768px) {
    .wp-block-heading.about-heading {
        font-size: 82px;
     }
}

@media screen and (min-width: 1024px) {
    .wp-block-heading.about-heading {
        font-size: 92px;
     }
}