body,h1,h2,h3,h4,h5,h6,p,blockquote,dl,dt,dd,ul,ol,li,pre,fieldset,lengend,button,input,textarea,th,td {margin: 0;padding: 0;}
body,button,input,select,textarea {font: 12px Microsoft Yahei,Tahoma,Helvetica,Arial,"\5b8b\4f53",sans-serif;}
h1 { font-size: 18px;}
h2 { font-size: 16px;}
h3 { font-size: 14px;}
h4,h5,h6 { font-size: 100%;}
ul,ol,li{ list-style: none;}
a {color:#000;text-decoration:none;cursor: pointer;}
a:hover { text-decoration:none;}
img { border:0 none; vertical-align:middle;}
table {border-collapse: collapse;border-spacing: 0;}
td,th { border: 1px solid #ccc;}
input{vertical-align:middle;outline:none;}
input::-webkit-input-placeholder { color:#CCC;font-family:Microsoft Yahei,Tahoma,Helvetica,Arial,"\5b8b\4f53",sans-serif;}
html { overflow-y: scroll;}
em{font-style: normal;}

.cf:before, .cf:after {content:"";display:table;}/* 别在content里添加内容 */
.cf:after {clear:both;}/* 写上就能自动生成了 */
.cf {zoom:1;}

body,html{
    height: 100%;
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    position: relative;
}