.indexcontent {
  margin: 0 auto;
  width: 1300px;
}

.n_banner {
  background: url(https://www.choexpo.com/style/images/n_banner.jpg) center no-repeat;
  height: 560px;
}

.n_title1 {
  font-size: 30px;
  color: #444444;
  line-height: 40px;
  text-align: center;
}

.n_title2 {
  font-size: 24px;
  color: #999999;
  line-height: 40px;
  text-align: center;
  text-transform: uppercase;
}

.n_hr1 {
  width: 84px;
  height: 2px;
  background: #1f61af;
  margin: 10px auto 0 auto;
}

.ab_d1_txt {
  float: left;
  width: 630px;
  font-size: 14px;
  color: #333;
  line-height: 30px;
}

.ab_d1_img {
  float: right;
}

.ab_d2 {
  height: 680px;
}

.ab_d2 .title1 {
  font-size: 48px;
  color: #ffffff;
  line-height: 60px;
  padding-top: 115px;
  text-align: center;
}

.ab_d2 .title2 {
  font-size: 14px;
  color: #ffffff;
  line-height: 30px;
  padding-top: 40px;
  text-align: center;
  height: 210px;
}

.ab_d3 {
  background: #fdfbfb;
}

.ab_d3 img {
  float: left;
  width: 650px;
}

.ab_d3 .txt {
  float: left;
  width: 650px;
  padding: 60px 0 0 80px;
  width: 540px;
  font-size: 16px;
  color: #444444;
  line-height: 25px;
}

.ab_d3 .txt * {
  font-size: 16px;
  color: #444444;
  line-height: 25px;
}

.i_fw_list {
  width: 684px;
  margin: 0 auto;
  padding-top: 20px;
}

.i_fw_list li {
  float: left;
  width: 228px;
}

.i_fw_list li .ico_c {
  width: 74px;
  height: 74px;
  border: #ffffff 1px solid;
  /* padding: 12px; */
  border-radius: 50%;
  margin: 0 auto;
  position: relative;
}

.i_fw_list li .ico_c .ico {
  width: 74px;
  height: 74px;
  border-radius: 50%;
  position: absolute;
  left: 0;
  top: 0;
  overflow: hidden;
}

.i_fw_list li .ico_c .ico img {
  width: 100%;
  height: 100%;
  display: block;
}

.i_fw_list li .ico_c .on_ico {
  display: none;
}

.i_fw_list li .ico_c:hover .on_ico {
  display: block;
}

.i_fw_list li .txt {
  font-size: 14px;
  color: #ffffff;
  line-height: 25px;
  padding-top: 10px;
  text-align: center;
}

.i_fw_list li:hover .ico_c {
  border: #2061b0 1px solid;
}

.i_nav2_list {
  border: #f5f5f5 1px solid;
  padding: 30px 0;
}

.i_nav2_list li {
  float: left;
  width: 25%;
  box-sizing: border-box;
  border-left: #e9e9e9 1px solid;
}

.i_nav2_list li:first-child {
  border-left: 0;
}

.i_nav2_list li .ico {
  width: 60px;
  height: 60px;
  margin: 0 auto;
  transition: transform 0.6s;
}

.i_nav2_list li .txt1 {
  font-size: 16px;
  color: #000000;
  line-height: 30px;
  text-align: center;
}

.i_nav2_list li .txt2 {
  font-size: 14px;
  color: #4d4d4d;
  line-height: 25px;
  text-align: center;
}

.i_nav2_list li:hover .ico {
  transform: rotateY(360deg);
}


.gg_lx ul:before {
  width: 50%;
}

.factory_gg ul:before {
  width: 50%;
}


@media screen and (max-width: 1080px) {
  .n_title1 {
    font-size: 18px;
    line-height: 25px;
  }
  .n_title2 {
    font-size: 14px;
    line-height: 25px;
  }
  .n_hr1{
    margin:5px auto 0;
  }

  .indexcontent,
  .ab_d1_txt,
  .i_fw_list {
    width: 100%;
  }

  .i_fw_list {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .ab_d1_txt {
    padding: 20px;
  }
  .ab_d2{
    height: 100%;
    padding:70px 20px 20px;
  }
  .ab_d2 .title1 {
    font-size: 24px;
    line-height: 30px;
    padding-top: 0px;
  }
  .ab_d2 .title2 {
    font-size: 12px;
    line-height: 25px;
    padding-top: 10px;
    height: 100%;
  }
  .ab_d3{
    padding: 20px;
  }
  .ab_d3 img{
    width: 100%;
  }
  .ab_d3 .txt {
    padding: 20px 0 0;
    width: 100%;
  }
  .ab_d3 .txt *{
    font-size:13px;
    color: #333333;
    line-height: 24px;
  }

  .i_nav2_list {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .i_nav2_list li {
    width: 50%;
    float: none;
    margin-bottom: 20px;
  }

  .i_fw_list li .ico_c {
    /* width: 50px;
    height: 50px; */
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .i_fw_list li .ico_c .ico {
    width: 50px;
    height: 50px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-size: auto 20px;
  }

  .i_fw_list li .txt {
    font-size: 12px;
  }
  .pc_show{
    display: none;
  }
}