Hi,
Please go to file
sns_kalolia/skin/frontend/sns_kalolia/default/less/core/custommenu.less
you find code line 284
> a { // link level 1
you change font-size. you can move write font-size: %; . if font-size is % you can config in admin
font-size: 16px;
font-size 16px = font-size : 125%; (16/13)

https://monosnap.com/file/3gxZEal0qSEa8HWubg4selWughsxZc#

Thanks