Why in mobile browsers is the font size smaller in links than in body text?

Question

HTML

On Android and Windows 7 phones, the text in links is two times smaller than the text outside links. All desktop browsers are fine. On the iPad too.
In this regard, 2 questions:
1. What could it be?
2. how to debug HTML on mobile devices?

Answer 1

1. It is necessary to look at the whole code, who knows what styles you have there.
2. How to test mobile layout?

Answer 2

@iiil thanks a lot for the advice, this advice got me to test everything.
The problem is in the following property:

a {
    display: inline-block;
}

It remains to understand why mobile browsers react inadequately to it.