Set the HTML in the CSS {} the font - size: 62.5% but in a different browser 1 rem is not equal to 10 px,
Such as Microsoft Edge and firefox 1 rem is equal to 10 px, but in the sogou and UC browser is 1 rem is equal to 12 px,

1, what method of forced sogou, UC browser such as 1 rem etc. 10 px? (in the case of browser do not change the default minimum font size, because it is impossible to let each user modify)
2, or HTML {} the font - size: 62.5% said applies only to set the font is better, only the width, higher or use best? Or setting this value is 62.5%, not directly use the browser's default 16 px is better?