How the mobile side defines the font font-family

How the mobile side defines the font font-family

Chinese font Use system default, English with Helvetica

/**/body{font-family:Helvetica;}   

Refer to "Thinking of using fonts on the mobile side"

Mobile font Unit font-size Select px or REM

For devices that only need to be adapted to a mobile device, use the PX

For devices that need to be adapted to a variety of mobile devices, use REM, such as a device that only needs to be adapted to different resolutions, such as iphone and ipad.

REM Configuration reference:

html{Font-size:10px}@media screen and (min-width:321px) and (max-width:375px) {Html{font-size:11PX}} @media screen and (min-width:376px) and (max-width:414px) {Html{font-size:12PX} @media screen and (min-width:415px) and (max-width:639px) { html{font-size:15px} } @media screen and (min-width:640px) and (max-width:719px) {html{font-size:20px} @media screen and (min-width:720px) and (max-width:749px) {html{font-size:22.5px}html{font-size:23.5px}  @media screen and (min-width:800px) {html{font-size:< Span style= "color: #0000ff;" >25px}            

How the mobile side defines the font font-family