How to make a mobile version of the site correctly?

Question

css

svaya-detal.ru
Problems are as follows:
1) Different pages open differently in a mobile browser. For example, the page svaya-detal.ru/evroshtaketnik opens normally, but the page svaya-detal.ru/commodity-i-uslugi-sh opens enlarged, not correctly. Tested browser - Safari, Iphone 5.
2) Zooming is not possible through a mobile browser, it's also not clear why.
Please help me decide, I really need it.

Answer 1

1. Scaling is impossible because you have it disabled here
2. For the mobile version of the site, you will still need to add styles using media query

Answer 2

You just need to put down a meta tag like this, instead of the existing one:
where 960 is the width of the site

Answer 3

Answer 4

The question remained open, scaling does not work