text: (function (doc, win) {
    var docEl = doc.documentElement,
      // 鎵嬫満鏃嬭浆浜嬩欢,澶ч儴鍒嗘墜鏈烘祻瑙堝櫒閮芥敮鎸� onorientationchange 濡傛灉涓嶆敮鎸侊紝鍙互浣跨敤鍘熷鐨� resize
        resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
        recalc = function () {
          //clientWidth: 鑾峰彇瀵硅薄鍙鍐呭鐨勫搴︼紝涓嶅寘鎷粴鍔ㄦ潯锛屼笉鍖呮嫭杈规
          var clientWidth = docEl.clientWidth;
          if (!clientWidth) return;
          docEl.style.fontSize = 50*(clientWidth / 375) + 'px';
        };
   
    recalc();
    //鍒ゆ柇鏄惁鏀寔鐩戝惉浜嬩欢 锛屼笉鏀寔鍒欏仠姝�
    if (!doc.addEventListener) return;
    //娉ㄥ唽缈昏浆浜嬩欢
    win.addEventListener(resizeEvt, recalc, false);
   
  })(document, window);