* {
  margin: 0;
  padding: 0;
  list-style: none;
}
html{
  font-size: 14px;
}
body {
  font-family: '微软雅黑';
  font-size: 14px;
  color: #3e3e3e;
  margin: 0;
}
ul,
li,
h1,
h2,
h3,
h4,
h5,
p,
img {
  list-style: none;
  border: 0;
}
input {
  font-family: '微软雅黑';
}
.fl {
  float: left;
}
.fr {
  float: right;
}
.clear {
  clear: both;
}
a {
  text-decoration: none;
}
.fixeder {
  left: 50%;
  margin: 0 0 0 -600px;
  position: fixed;
  top: 0px;
  width: 1200px;
  z-index: 9999;
}
.fixederR {
  right: 50%;
  margin: 0 -600px 0 0;
  position: fixed;
  top: 0px;
  width: 1200px;
  z-index: 9999;
}
.fixederR1 {
  right: 50%;
  margin: 0 -550px 0 0;
  position: fixed;
  top: 0px;
  width: 1100px;
  z-index: 9999;
}

:root{
  --screen-wrapper-width:1920;
  --screen-wrapper-height:1080;
}