layout of page is not unitary

hi,
i use the free theme wpzoom Inspiro with the setting “Homepage (Page Builder)”.
I have the following layout problem with my homepage:
first I use two blocks which are displayed centered as i want. Then follow three columns with text, but which spread to the edge of the window.

How can I bring the three columns to be as wide as the 2 blocks above?

thx & regards

The page I need help with: [log in to see the link]