body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,button,textarea,p,blockquote,th,td,article,aside,details,figcaption,figure,footer,header,main,nav,section,summary,audio,canvas,video {
    margin:0;
    padding:0
}


html{height: 100%}
body {font-family:"Microsoft Yahei";color:#555;height:100%;}
a{text-decoration: none;}a:hover{text-decoration: none;}
li {list-style:none}