第一：css3媒体查询实现适配，比如如下：html{font-size:20px;}@mediaonlyscreenand(min-width:401px){html{font-size:25px!important;}}@mediaonlyscreenand(min-width:428px){html{font-size:26.75px!important;}}@mediaonlyscreenand(min-width:481px){html{font-size:30px!important;}@mediaonlyscreenand(min-width:569px){html{font-size:35px!important;}}@mediaonlyscreenand(min-width:641px){html{font-size:40px!important;二、通过js动态设置html字体，例如如下vardocEl=doc.documentElement,resizeEvt='orientationchange'inwindow?'orientationchange':'resize',recalc=function(){varclientWidth=docEl.clientWidth;如果（！clientWidth）返回；//默认设计图为640时1rem=100px；修改if(clientWidth>=640){docEl.style.fontSize='100px';}else{文档样式。fontSize=100*(clientWidth/640)+'px';}};如果（！doc.addEventListener）返回；win.addEventListener(resizeEvt,recalc,false);doc.addEventListener('DOMContentLoaded',recalc,false);})(文档,窗口);
