@media screen and (max-width:768px) {
      .section-a2 li>div {
          padding: 15px;
      }

      .section-a2 li>div .info-r {
          width: 63%;
          margin-left: 16px;
          float: left;
      }
  }
  .sliderimg{
    background-image: url(/static/home/image/SDK.png)
  }