body,div,ul,ol,dl,dt,dd,li,dl,h1,h2,h3,h4,button{margin:0;padding:0;font-style:normal;
font-family: "微软雅黑","Microsoft YaHei", 'Helvetica Neue', Helvetica, 'Lucida Grande', Arial, 'Hiragino Sans GB', 'WenQuanYi Micro Hei', STHeiti, SimSun, sans-serif;}
 ol,ul,li{list-style:none;}
 img{border:0;vertical-align:middle;}
 body{color:#000000;background:#fff;min-width: 1400px;}
 .clear::after{content: ''; clear:both;height:1px;visibility:hidden;display: block;}
 .clear{zoom: 1;}
 a{color:#000000;text-decoration:none;}
 button{border: none;outline: none;}
.fl{float: left;}
.fr{float: right;}
*{font-family:  Microsoft Yahei; margin: 0;padding: 0;}
p{font-size: 12px;}

.lt-back-top {
  position: fixed;
  bottom: 150px;
  right: 50px;
  z-index: 999;
  cursor: pointer;
  display: none;
  transition: all 0.2s;
}
.lt-back-top a {
  display: block;
}