html,body { height:100%; background:#fff; }
body,textarea { font:12px "宋体",Arial,sans-serif; }
body,form,menu,dir,fieldset,blockquote,p,pre,ul,ol,dl,dd,h1,h2,h3,h4,h5,h6 { padding:0; margin:0; }
sup,sub { vertical-align:baseline; }
table { border-collapse:collapse; }
li { list-style:none; }
fieldset,a img { border:0; }
button,label,input.radio,input.checkbox { cursor:pointer; }
input[type=radio],input[type=checkbox] { cursor:pointer; }
.claer:after { content:"清除浮动"; clear:left; display:block; font-size:0; height:0; overflow:hidden; }