Why the font size won't change with browser zoom in?

Question

In most of websites, while I change the zoom level of browsers, the font size will also increase and help user to see them. For some reasons, that just won\'t work on my new

Answer 1

Fonts using a specific pixel size are not relative (along with several others). Zooming changes that relative information.

From http://www.westciv.com/style_master/academy/css_tutorial/properties/values.html

Name        Abbrev. Explanation                             Relative?
em          em      The height of a font                    yes
ex          ex      The height of the letter x in a font    yes
pica        pc      1 pica is 12 points                     no
point       pt      1/72 of an inch                         no
pixel       px      One dot on a screen                     no
millimeter  mm      Printing unit                           no
centimeter  cm      Printing unit                           no
inch        in      Printing unit                           no