Vue cli, Meitu T9 adaptation problem

I use px2rem loader and flexible to do the adaptation. It’s all good, but the layout collapsed on Meitu T9. I customized the same devicepixelratio value as Meitu T9 in the debugging mode of the browser, and found that it’s completely OK, but its width on the mobile phone will be dozens of PX more than that on the browser. What’s the reason? It’s on the browser

This is what I saw on my cell phone

Whether it’s data DPR value, HTML font size, or meta, it’s the same, and it’s a mixed development