unable to set page layout, gaps between the blocks

Hello, We have a problem about page structure,

We do understand how to change and play with the spacer blocks but whatever we try, the outcome stays that it looks different on different types of devices. 

The layout of the project pages on our website should all look similar, but unfortunately it looks different on my laptop (MacBook) than on my colleagues computer (LG). This problem is not only limited to the brands of the computers but also to the devices: phone and tablet.

How can we arrange it in a way it looks similar everywhere?

And, if we need to code for this, which code do we need and how do we do this? …because we have never done this before.

Can you share link to page in screenshot? We can check easier