How to design text linked to cms


I’m having trouble with some cms links.
I linked everything to CMS but I don’t know how to style it.
It has some predetermined colors and alignment but can’t change it.
For example Headings are aligned to the left and when I try to put them in the middle header won’t move at all. Also, borders and some texts are in a light brown color, but when styling on my design page it appears like there are no borders applied or any color.

I added some images to explain myself better.
Thank you.

Here is my site Read-Only: LINK