Font size and pull-to-refresh image is too small

[schua1]

I use Vue 2.5.2 and vue-scroller 2.2.4.
I have global css settings and the font size is set to 0.3733rem (about 14px).
In web browser like FF and chrome and even on android system, the scroller works fine to me.
However, on iOS (iPhone 6s) the text and image are very small and remains as it was even after I try to set the inline style as following or pixels expilicitly.
<scroller :on-refresh="refresh" style="box-sizing: border-box; padding-top: 1.2rem; font-size: 0.667rem">
Is there any way to change style to enlarge the text and pull-to-refresh image?

[schua1]

I think the root cause we used the taobao flexible + px2rem-loader solution to auto adjust the font size on different device by using dpr and rem.
This plugin is not compatible with flexibly solution.