[Theme Parabola] Reduce space between slider and columns on front page

Hi, I would like to reduce the space between the slider and columns on the presentation page/home page of the parabola theme.

The website I am working on is http://www.huysamercapital.com/

I reduced the space between the top navigation bar and slider by using #access { position: relative; margin-bottom: -40px; } in a child theme style.css. But can’t figure out how to reduce the space after the slider.

Thanks!