html {
  width:100%;
  font-family: "microsoft yahei";
  font-size:62.5%;
}
body {
  margin: 0;
  padding: 0;
  position: relative;
}
p,
h1,
h2,
h3,
h4,
h5,
h6,
ul,
li,
tr,
td,
th {
  margin: 0;
  padding: 0;
}
li {
  list-style: none;
}
.lt {
  float: left;
}
.rt {
  float: right;
}
a {
  text-decoration: none;
}