.clearfix:after {
  visibility: hidden;
  display: block;
  font-size: 0;
  content: " ";
  clear: both;
  height: 0;
}

.clearfix {
  display: inline-block;
}

* html .clearfix {
  height: 1%;
}

.clearfix {
  display: block;
}

.arable {
  margin: 0 auto;
  width: 1000px;
}

.left,
.pull-left {
  display: block;
  float: left;
}

.right,
.pull-right {
  display: block;
  float: right;
}

.hide-text {
  display: block;
  overflow: hidden;
  text-indent: 100%;
  white-space: nowrap;
}