css3自适应圆

      width:auto;
      height:auto;
      border-radius:14px;
      padding:0 4px;
      min-width: 18px;
      background: #FF4040FF;
      text-align: center;
      color: #fff;
      font-size: 14px;
      position: absolute;
      left: 260px;
      top: -83px;