Why is the scale of the blocks in the iPhone browser different?

Question

iPhone

So, there is a layout. The page width is specified for mobile devices.
But, the browser increases some headings. Naturally, the rest of the layout goes. How to ensure that both headings and text are the correct size?

Answer 1

Figured it out myself.
one.

meta name="viewport" content="width=device-width"

2. I changed it on my computer and looked at the result on the server. We need to be more careful...