*{margin: 0;padding: 0;}
a{text-decoration: none;}
ol,ul,li{list-style: none;}
b,strong{font-weight: normal;}
i,em{font-style: normal;}
img{vertical-align: top;}
.fl{float: left;}
.fr{float: right;}
.clear{clear: both;}
.clearfix::after{
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    display: block;
    clear:both;
}
body{
    font-family: 微软雅黑;
    font-size: 16px;
}