pc高度自适应

(function(doc, win) {

      var docEl = doc.documentElement;

      function adaptScreen(){

      var deviceWidth = docEl.clientWidth;

      deviceWidth = deviceWidth < 1366 ? 1366 : deviceWidth;

      var rate = (deviceWidth / 1366) * 625;

      docEl.style.fontSize = rate + "%";

      }

      win.addEventListener("resize", adaptScreen, false);

      doc.addEventListener('DOMContentLoaded', adaptScreen, false);

      })(document, window);