body,p,ul,ol,input,button,h1,h2,h3,h4,h5,h6,textarea,th,td,hr{
    margin:0;
    padding:0;
    color:#000;
    font-size: 14px;
    font-family:"Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}
li{
    list-style:none;
    font-family:"Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}
em,b,i,strong,h1,h2,h3,h4,h5,h6{
    font-style:normal;
    font-family:"Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif; font-weight: normal;
}
a{
    outline:none; text-decoration:none;
    font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif; cursor:pointer;
}
img{
    border:none; vertical-align:top;
}
input,button,textarea,em{
    background: none;
    border:none;
    outline:none;
    overflow: hidden;
    resize: none;
    font-family:"Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}
button{
    cursor: pointer;
}
/* 以下两句会让单元格间没有空白间隙 */
table{
    border-collapse:collapse
}
th,td{
    border:1px solid black;
}

.clear:after{
    content:""; display:block; clear:both;
}
.clear{
    zoom:1;
}