@circular-radius:50%;
@square-radius:0%;
.yy-rotary {
  position:relative;
  box-sizing:border-box;
  border: 1px solid #ccc;
  &.circular {
    border-radius: @circular-radius;
  }
  &.square{
    border-radius: @square-radius;
  }
  &.left{
    margin:none;
  }
  &.center{
    margin:auto;
  }
}