html,body,div,span,object,h1,h2,h3,h4,h5,h6,p,a,address,cite,del,em,img,q,u,i,dl,dt,dd,ol,ul,li,form,label,table,tr,th,td,caption,tbody,tfoot,thead,article,aside,details,summary,figure,figcaption,footer,header,menu,nav,section,audio,input,select,textarea{padding:0;margin:0;border:none;}
*{font-family:"microsoft yahei",Helvetica,Arial,Tahoma,sans-serif;font-size: inherit;}
body{min-width:320px;max-width:640px;margin:0 auto;cursor:default;word-break:break-all;white-space:normal;-webkit-tap-highlight-color:rgba(255,255,255,0);}
header,footer,nav,section,menu,article,aside{display:block;}
ul,li{list-style:none;}
a{text-decoration:none;}
img{vertical-align:middle;}
.clearfix:after{content:" ";display:block;height:0;clear:both;visibility:hidden}
.boxsizing{box-sizing: border-box;-webkit-box-sizing: border-box;-moz-box-sizing: border-box;  }
/*去除苹果设备默认属性*/
input[type="button"],input[type="submit"],input[type="reset"],input[type="text"],input[type="tel"],button{-webkit-appearance: none;}
textarea{-webkit-appearance:none;border-radius:0;}
/*去除Chrome等浏览器文本框默认发光边框*/
input:focus,textarea:focus,button:focus{outline:none;}
 
/*媒体查询*/
@media screen and (max-width:321px){html{font-size:77.3px;}}
@media screen and (max-width:374px) and (min-width: 322px){html{font-size:84.1px;}}
@media screen and (max-width:413px) and (min-width: 375px){html{font-size:90.6px;}}
@media screen and (max-width:639px) and (min-width: 414px){html{font-size:100px;}}
@media screen and (min-width:640px){html{font-size:154.6px;}}