.index_products{
    max-width: 1300px;
    height: 219px;
    margin: 0 auto;
  }
  .index_products ul{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    background: url(../images/fengexian.png) no-repeat;
    background-position: 284px 153px;
    background-size: 1040px;
  }
  .index_products ul li{
    width: 50%;
    height: 219px;
    position: relative;
  }
  .index_products ul li:nth-child(1) h1{
    position: absolute;
    top: 119px;
    font-size: 40px;
    color:#222;
    font-weight: 700;
  }
  .index_products ul li:nth-child(1) img{
    position: absolute;
    top: 143px;
    left: 180px;
  }
  .index_products ul li:nth-child(2) a{
    position: absolute;
    top: 141px;
    right: 0;
    color: #999999;
    font-size: 18px;
  }

  /* about_box1 */
  .about_box1{
      max-width: 1300px;
      height: 393px;
      margin: 0 auto;
      border-bottom: 1px solid #e5e5e5;
  }
  .about_box1 ul{
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
  }
  .about_box1 ul li{
      width: 50%;
      height: 393px;
  }
  .about_box1 ul li:nth-child(2) h1{
      margin-top: 29px;
      font-size: 27px;
      color: #222;
      font-weight: 700;
      margin-left: 28px;
  }
  .about_box1 ul li:nth-child(2) img{
      margin-top: 30px;
      margin-left: 28px;
  }
  .about_box1 ul li:nth-child(2) p{
      margin-top: 40px;
      margin-left: 28px;
      font-size: 14px;
      color: #949494;
      text-align: justify;
      line-height: 22px;
  }
  .about_box1 ul li:nth-child(2) p:nth-child(4){
    animation:fadeInRightBig;
    animation-duration: 2s;
  }
  /* about_box2 */
  .about_box2{
      max-width: 1300px;
      height: 237px;
      margin: 0 auto;
  }
  .about_box2 ul{
      display:flex;
      flex-wrap: wrap;
      justify-content: space-between;
  }
  .about_box2 ul li{
      width: 33%;
      height: 237px;
      text-align: center;
      position: relative;
  }
.about_box2 ul li .poi{
        width: 1px;
        height: 74px;
        background: #e5e5e5;
        position: absolute;
        right: 0;
        top: 81px;
}
.about_box3{
    max-width: 1300px;
    height: 734px;
    margin: 0 auto;
    position: relative;
}
.about_box3 .iuy{
    width: 660px;
    height: 349px;
    border-top: 11px solid #fff;
    border-left: 11px solid #fff;
    position: absolute;
    right: 0;
    bottom:120px;
}