(function(win) {
			    		var tid;
			    		function refreshRem() {
			    			let designSize = 750; // 设计图尺寸
			    			let html = document.documentElement;
			    			let wW = html.clientWidth;// 窗口宽度
			    			let rem = wW * 100 / designSize; 
			    			document.documentElement.style.fontSize = rem + 'px';
			    	    }
				     
				    win.addEventListener('resize', function() {
				    	clearTimeout(tid);
				    	tid = setTimeout(refreshRem, 300);
				    }, false);
				    win.addEventListener('pageshow', function(e) {
				    	if (e.persisted) {
				    		clearTimeout(tid);
				    		tid = setTimeout(refreshRem, 300);
				    	}
				    }, false);
			
				    refreshRem();
			
				})(window);