css 全局添加box-sizing：border-box。来自 - http://www.paulirish.com/2012/box-sizing-border-box-ftw/

Posted 2021-05-13

/* apply a natural box layout model to all elements */ *, *:before, *:after {   -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box;  }