750设计转换rem

( function ( n, e) {

var t = n. documentElement, i = "orientationchange" in window ? "orientationchange" : "resize", d = function () {

var n = t. clientWidth;

n && ( t. style. fontSize = n / 7.5 + "px")

};

n. addEventListener && ( e. addEventListener( i, d, ! 1), n. addEventListener( "DOMContentLoaded", d, ! 1))

})( document, window);