html,body{font-family:'微软雅黑',Arial, Helvetica, sans-serif;padding:0;margin:0;background:#fff;}
body{min-height: 100%;}
/* dom list normal style settings */
form,ul,li,p,h1,h2,h3,h4,h5,h6,dl,dd,dt{margin:0px;padding:0px;}
ul,li,dl,dd,dt{list-style-type:none;}
a,a:link,a:visited{text-decoration:none;}
/* margin and padding settings */
.pt10{padding-top:10px;}
.pt20{padding-top:20px;}
.pt50{padding-top:50px;}
.pt100{padding-top:100px;}
.pt150{padding-top:150px;}
.mt20{margin-top:20px;}
.mt30{margin-top:30px;}
.mt40{margin-top:40px;}
.mt50{margin-top:50px;}
.mt100{margin-top:100px;}
.mb5{margin-bottom:5px;}
.mb10{margin-bottom:10px;}
.mb15{margin-bottom:15px;}
.mb20{margin-bottom:20px;}
.mb30{margin-bottom:30px;}
.mb40{margin-bottom:40px;}
.mb50{margin-bottom:50px;}
.h20{height:20px;}
.h40{height:40px;}
.clean{height:1px; clear:both;overflow:hidden;}
.display{display:block;}
.undisplay{display:none;}