* {margin:0; padding:0; box-sizing: border-box;}
body {
  margin:0;
  padding:0;
  font-family:"微软雅黑","宋体";
  font-size:15px;
  color:#333333;
  background-size: contain;
}
ul,li {list-style:none; margin:0; padding:0;}
a {
  text-decoration: none;
  color: #333333;
}
.clear{
  clear: both;
}
.left{
  float: left;
}
.right{
  float: right;
}
.block{
  display: block;
}
.none{
  display: none;
}
.margin_r0{
  margin-right: 0 !important;
}
tr,td{
  padding: 0;
  margin: 0;
}