You can edit the spacing here:
#s5_top_row1_area_inner, #s5_top_row2_area_inner, #s5_top_row3_area_inner, #s5_above_columns_inner, #s5_below_columns_inner, #s5_center_area1, #s5_above_columns_inner, #s5_bottom_row2_area_inner, #s5_bottom_row3_area_inner {
padding-bottom: 110px;
padding-top: 110px;
template.css line 1005
The reason you articles aren't full width is because of tables in your article content. See my attached screenshot