1、postcss-px2rem-exclude（推荐）||postcss-px2rem（不推荐）；2、rem.js第一步：npminstallpostcss-px2rem-exclude--save//找到：postcss.config.js//在plugins新增'postcss-px2rem-exclude':{remUnit:37.5,//1rem等于多少px，此为转换单位（不重要）exclude:/no