.banner_width {
  margin: 0 auto;
  min-width: 1200px;
  width: 1200px;
}

.fl {
  float: left;
}

.fr {
  float: right;
}

.clearfix {
  zoom: 1;
}

.clearfix:before,
.clearfix:after {
  display: table;
  content: "";
  line-height: 0;
}

.clearfix:after {
  clear: both;
}

.mar-t-5 {
  margin-top: 5px;
}

.mar-b-5 {
  margin-bottom: 5px;
}

.mar-l-5 {
  margin-left: 5px;
}

.mar-r-5 {
  margin-right: 5px;
}

.mar-t-10 {
  margin-top: 10px;
}

.mar-b-10 {
  margin-bottom: 10px;
}

.mar-l-10 {
  margin-left: 10px;
}

.mar-r-10 {
  margin-right: 10px;
}