How to make a website work on iPhone 4,5,6?

Question

Design

Forgive anyone who has an iPhone to view the site mechta24.com (in a standard browser), vertical and horizontal layout . And if possible, write the phone model, and attach screenshots here.
ps: otherwise there is some kind of trouble, they say on some iPhone (in a vertical format, a white scroll is visible on the right, but in a horizontal view, in general, half of the white piece sticks out)

Answer 1

Download safari, narrow the window, and look.

Answer 2

Chrome -> F12 -> Ctrl+Shift+M

Answer 3

iPhone 5, vertical, white scroll on the right.

Answer 4

chrome and safari won't always show the truth.
Only Xcode and simulator.
iphone 4s - everything is ok, except that the page width is slightly larger. (there is a horizontal scroll)