.mainbox {
  font-family: 'pingfangsc-medium,pingfang sc';
}
.mainbox .banner {
  margin-bottom: 0;
}
.mainbox .banner h3 {
  font-size: 14px;
  opacity: 0.9;
}
.mainbox .banner .btn {
  font-size: 16px;
  opacity: 0.9 !important;
}
.mainbox .banner .btn:hover {
  opacity: 1!important;
}
.mainbox .banner .btn-blue {
  background-color: #006edb;
}
.mainbox .banner .btn-yellow {
  background-color: rgba(0, 0, 0, 0);
  border: 1px solid #fff;
}
.mainbox .part {
  width: 1180px;
  margin: 0 auto;
}
.mainbox .partone {
  display: flex;
  justify-content: center;
  padding: 60px 0;
}
.mainbox .partone li {
  width: 340px;
  align-self: center;
}
.mainbox .partone li .title {
  font-size: 16px;
  font-weight: 600;
  color: #172b4d;
  line-height: 22px;
  margin-bottom: 30px;
  position: relative;
}
.mainbox .partone li .title::after {
  content: '';
  display: block;
  width: 30px;
  height: 3px;
  background-color: #106def;
  position: absolute;
  left: 0;
  bottom: -10px;
}
.mainbox .partone li .desc {
  font-size: 14px;
  color: #6b798e;
  line-height: 26px;
}
.mainbox .partone li.mid {
  width: 427px;
  height: 400px;
  margin: 0 20px;
}
.mainbox .partone li.mid img {
  width: 100%;
}
.mainbox .parttwo {
  height: 400px;
  display: flex;
  background-color: #f8f9fd;
}
.mainbox .parttwo .parttwo_left,
.mainbox .parttwo .parttwo_right {
  width: 50%;
  height: 100%;
}
.mainbox .parttwo .parttwo_left {
  position: relative;
  background:  no-repeat center / cover;
}
.mainbox .parttwo .parttwo_left .innerbox {
  width: 570px;
  height: 220px;
  background-color: #377fea;
  border-radius: 4px 0 0 4px;
  padding-top: 50px;
  padding-left: 30px;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translatey(-50%);
}
.mainbox .parttwo .parttwo_left .innerbox .innertitle {
  font-size: 30px;
  color: #fff;
  line-height: 40px;
  position: relative;
}
.mainbox .parttwo .parttwo_left .innerbox .innertitle_line::after {
  content: '';
  display: block;
  width: 70px;
  height: 3px;
  background-color: #fff;
  position: absolute;
  left: 0;
  bottom: -20px;
}
.mainbox .parttwo .parttwo_left .innerbox .inner_img {
  width: 100px;
  height: 100px;
  background:  no-repeat center / cover;
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translatey(-50%);
}
.mainbox .parttwo .parttwo_right {
  height: 100%;
  padding-top: 60px;
}
.mainbox .parttwo .parttwo_right li {
  width: 365px;
  margin-bottom: 60px;
  margin-left: 200px;
  position: relative;
}
.mainbox .parttwo .parttwo_right li .li_title {
  font-size: 16px;
  font-weight: 600;
  color: #172b4d;
  line-height: 22px;
  margin-bottom: 10px;
}
.mainbox .parttwo .parttwo_right li .li_desc {
  font-size: 14px;
  color: #6b798e;
  line-height: 26px;
}
.mainbox .parttwo .parttwo_right li.li_fst::after {
  content: '';
  display: block;
  width: 62px;
  height: 62px;
  position: absolute;
  left: -88px;
  top: 50%;
  transform: translatey(-50%);
  background:  no-repeat center / cover;
}
.mainbox .parttwo .parttwo_right li.li_scd::after {
  content: '';
  display: block;
  width: 62px;
  height: 62px;
  position: absolute;
  left: -88px;
  top: 50%;
  transform: translatey(-50%);
  background:  no-repeat center / cover;
}
.mainbox .partthree {
  height: 800px;
  padding-top: 70px;
  text-align: center;
  overflow: hidden;
}
.mainbox .partthree .part_title {
  display: inline-block;
  font-size: 32px;
  color: #172b4d;
}
.mainbox .partthree .part_title:after {
  content: '';
  display: block;
  width: 80%;
  height: 39px;
  background-color: pink;
  margin: 0 auto;
  margin-top: -30px;
  background:  no-repeat center;
  background-size: auto 39px;
}
.mainbox .partthree .partthree_list {
  position: relative;
  display: flex;
}
.mainbox .partthree .partthree_list ul {
  width: 50%;
  text-align: right;
}
.mainbox .partthree .partthree_list ul .list_li {
  width: 300px;
  text-align: left;
  display: inline-block;
  position: relative;
  top: 30px;
  right: 60px;
}
.mainbox .partthree .partthree_list ul .list_li .li_title {
  font-size: 16px;
  font-weight: 600;
  color: #172b4d;
  line-height: 22px;
  margin-bottom: 10px;
}
.mainbox .partthree .partthree_list ul .list_li .li_desc {
  font-size: 14px;
  color: #6b798e;
  line-height: 26px;
}
.mainbox .partthree .partthree_list ul .list_li::after {
  content: '';
  display: block;
  width: 67px;
  height: 67px;
  position: absolute;
  top: 0;
  left: -90px;
}
.mainbox .partthree .partthree_list ul .list_li:nth-child(1)::after {
  background:  no-repeat center / cover;
}
.mainbox .partthree .partthree_list ul .list_li:nth-child(2)::after {
  background:  no-repeat center / cover;
}
.mainbox .partthree .partthree_list ul .list_li:nth-child(3)::after {
  background:  no-repeat center / cover;
}
.mainbox .partthree .partthree_list ul .list_li:nth-child(2) {
  margin: 105px 0;
}
.mainbox .partthree .partthree_list .ul_right {
  width: 50%;
  text-align: left;
}
.mainbox .partthree .partthree_list .ul_right .list_li {
  left: 150px;
  top: 150px;
  margin-bottom: 25px;
}
.mainbox .partthree .partthree_list .ul_right .list_li::after {
  content: '';
  display: block;
  width: 67px;
  height: 67px;
  position: absolute;
  left: -90px;
  top: 0;
}
.mainbox .partthree .partthree_list .ul_right .list_li:nth-child(1)::after {
  background:  no-repeat center / cover;
}
.mainbox .partthree .partthree_list .ul_right .list_li:nth-child(2)::after {
  background:  no-repeat center / cover;
}
.mainbox .partthree .partthree_list .partthree_line {
  width: 90px;
  height: 650px;
  background:  no-repeat center / cover;
  position: absolute;
  left: 50%;
  transform: translatex(-50%);
  top: 30px;
}
.mainbox .partfour {
  width: 100%;
  height: 178px;
  background:  no-repeat center / cover;
  padding-top: 30px;
}
.mainbox .partfour .title {
  font-size: 32px;
  color: #ffffff;
  line-height: 45px;
  text-align: center;
  margin-bottom: 20px;
}
.mainbox .partfour .btn {
  display: block;
  width: 140px;
  height: 44px;
  line-height: 44px;
  text-align: center;
  background-color: #006edb;
  margin: 0 auto;
  font-size: 16px;
  color: #ffffff;
  border-radius: 2px;
  opacity: 0.9;
  cursor: pointer;
}
.mainbox .partfour .btn:hover {
  opacity: 1;
}
@media screen and (max-width: 1200px) {
  .mainbox .banner {
    text-align: center;
  }
  .mainbox .banner h1 {
    text-align: center;
  }
  .mainbox .banner h3 {
    width: 100%;
    text-align: center;
  }
  .mainbox .banner a {
    display: inline-block;
  }
  .mainbox .part {
    width: 100%;
  }
  .mainbox .partone {
    display: block;
    padding: 40px 20px;
  }
  .mainbox .partone li {
    width: 100%;
  }
  .mainbox .partone li.mid {
    width: 90%;
    height: unset;
    max-width: 427px;
    margin: 0 auto;
  }
  .mainbox .parttwo {
    display: block;
    height: unset;
    width: 100%;
  }
  .mainbox .parttwo .parttwo_left,
  .mainbox .parttwo .parttwo_right {
    width: 100%;
  }
  .mainbox .parttwo .parttwo_left li,
  .mainbox .parttwo .parttwo_right li {
    width: 100%;
    text-align: left;
  }
  .mainbox .parttwo .parttwo_left {
    height: 300px;
  }
  .mainbox .parttwo .parttwo_left .innerbox {
    width: 90%;
  }
  .mainbox .parttwo .parttwo_left .innerbox .inner_img {
    width: 60px;
    height: 60px;
    right: 20px;
  }
  .mainbox .parttwo .parttwo_right {
    height: unset;
  }
  .mainbox .parttwo .parttwo_right li {
    width: 100%;
    margin-left: 0;
    margin-bottom: 0;
    padding-bottom: 40px;
  }
  .mainbox .parttwo .parttwo_right li h3 {
    width: 100%;
    padding-left: 80px;
    padding-right: 20px;
  }
  .mainbox .parttwo .parttwo_right li.li_fst::after {
    left: 10px;
    top: 50px;
  }
  .mainbox .parttwo .parttwo_right li.li_scd::after {
    left: 10px;
    top: 50px;
  }
  .mainbox .partthree {
    height: unset;
    padding-bottom: 34px;
  }
  .mainbox .partthree .partthree_list {
    display: none;
  }
  .mainbox .partthree .partthree_list_mobile {
    display: block!important;
    position: relative;
  }
  .mainbox .partthree .partthree_list_mobile .partthree_mobile_line {
    width: 28px;
    height: 802px;
    position: absolute;
    left: 10px;
    top: 10px;
    background:  no-repeat center / cover;
  }
  .mainbox .partthree .partthree_list_mobile ul {
    width: 100%;
    padding-left: 100px;
    margin-top: 20px;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li {
    width: 100%;
    height: 195px;
    text-align: left;
    position: relative;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li .li_title {
    font-size: 16px;
    font-weight: 600;
    color: #172b4d;
    line-height: 22px;
    margin-bottom: 10px;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li .li_desc {
    font-size: 14px;
    color: #6b798e;
    line-height: 26px;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li::after {
    content: '';
    display: block;
    width: 50px;
    height: 50px;
    position: absolute;
    top: 0;
    left: -60px;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li:nth-child(1)::after {
    background:  no-repeat center / cover;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li:nth-child(2)::after {
    background:  no-repeat center / cover;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li:nth-child(3)::after {
    background:  no-repeat center / cover;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li:nth-child(4)::after {
    background:  no-repeat center / cover;
  }
  .mainbox .partthree .partthree_list_mobile ul .list_li:nth-child(5)::after {
    background:  no-repeat center / cover;
  }
}