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							- (function (doc, win) {
 
-     var docEl = doc.documentElement,
 
-         resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
 
-         recalc = function () {
 
-             var clientWidth = docEl.clientWidth;
 
-             if (!clientWidth) return;
 
-             if (clientWidth >= 750) {
 
-                 docEl.style.fontSize = '100px';
 
-             } else {
 
-                 //html根元素大小   100设计稿的html大小 
 
-                 docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';
 
-             }
 
-         };
 
-     if (!doc.addEventListener) return;
 
-     win.addEventListener(resizeEvt, recalc, false);
 
-     doc.addEventListener('DOMContentLoaded', recalc, false);
 
- })(document, window);
 
 
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