*, *:after, *:before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  *behavior: url('../behaviors/box-sizing/boxsizing.php');
}

img, video {
  max-width: 100%;
  height: auto;
}

.clearfix {
  *zoom: 1;
}
.clearfix:before, .clearfix:after {
  display: table;
  content: "";
}
.clearfix:after {
  clear: both;
}