.mb30 {
  margin-bottom: 30px;
}

.bg {
  height: 559px;
  background: #050821 url('../images/product/banner.jpg') no-repeat;
  background-size: 100% 100%;
}

.bg .title {
  padding-top: 177px;
  margin-left: 385px;
  color: rgba(255, 255, 255, 1);
  text-shadow: 4px 1px 0px rgba(0, 0, 0, 0.11);
}

.bg .title h3 {
  font-size: 60px;
  letter-spacing: 10px;
  font-weight: 400;
  margin-bottom: 15px;

  text-shadow: 4px 1px 0px rgba(0, 0, 0, 0.11);
}

.bg .title p {
  font-size: 30px;
  opacity: 0.6;
}

.tab {
  height: 100px;
  color: #1A2448;
  font-size: 34px;
  font-weight: bold;
  box-shadow: 0px 1px 8px 0px rgba(0, 0, 0, 0.19);
  box-sizing: border-box;
  text-align: center;
}

.tab .item {
  float: left;
  position: relative;
  cursor: pointer;
  line-height: 100px;
  margin-right: 376px;
  margin-left: 250px;
}

.tab .item:last-child {

  margin-right: 0;
  margin-left: 0;
}

.tab .item.active {
  color: #D72122;
}

.tab .item.active .line {
  display: block;
  margin-left: 44px;
  position: absolute;
  bottom: 0;
  width: 48px;
  height: 5px;
  background: rgba(215, 33, 34, 1);
  box-shadow: 0px 1px 8px 0px rgba(0, 0, 0, 0.19);
  border-radius: 3px;
}

.box {
  margin-top: 80px;
  display: none;
}

.box .item {
  background: rgba(241, 245, 255, 1);
  box-shadow: 0px -3px 7px 0px rgba(145, 150, 166, 0.16), 0px 4px 11px 0px rgba(228, 236, 255, 0.74), 0px -4px 7px 0px rgba(131, 141, 164, 0.54);
  border-radius: 12px;
  position: relative;
}

.box .item .link {
  margin: 0 79px;
}

.box .item .link .link-item {
  margin-top: -68px;
  width: 34px;
  height: 113px;
  z-index: 2;
  background: url('../images/product/link.png') no-repeat;
}


.box .item .big-title {
  height: 120px;
  background: rgba(241, 245, 255, 1);
  box-shadow: 1px 4px 8px 0px rgba(145, 150, 166, 0.28), 0px 2px 5px 0px rgba(202, 209, 226, 0.74), 0px -2px 3px 0px rgba(131, 141, 164, 0.41);
  border-radius: 12px 12px 0px 0px;
}

.box .item .big-title p {
  font-size: 44px;
  color: #1A2448;
  text-align: center;
  line-height: 120px;
}

.box .item .big-title .pic {
  width: 30px;
  height: 22px;
  display: inline-block;
  margin: 0 23px 5px 23px;
  background: url('../images/product/titile.png') no-repeat;
}

.box .item .content1 {
  height: 485px;
  margin: 60px 40px 30px 20px;
  background: url('../images/product/1.png') no-repeat;
}

.box .item .text {
  margin-top: 70px;
  width: 452px;
  height: 307px;
  padding: 40px;
  box-sizing: border-box;

}

.box .item .text h2 {
  margin-bottom: 13px;
  color: #1A2448;
  font-size: 24px;
  font-weight: bold;

}

.box .item .text h2 .jiao {
  width: 20px;
  height: 18px;
  display: inline-block;
  margin-right: 10px;
  background: url('../images/jiao_2.png') no-repeat;

}

.box .item .text p {
  color: #485069;
  font-size: 18px;
  line-height: 28px;

}

.box .item .content2 {
  height: 460px;
  margin: 20px 40px 37px 26px;
  background: url('../images/product/2.png') no-repeat;
}

.box .item .content3 {
  height: 647px;
  margin: -30px 12px 31px;
  background: url('../images/product/3.png') no-repeat;
}


.box .item .title {
  padding-top: 50px;
  font-size: 36px;
  color: #1A2448;
  font-weight: bold;
  text-align: center;
}

.box .item .content4 {
  height: 513px;
  margin: 30px 40px 27px 20px;
  background: url('../images/product/2_1.png') no-repeat;
}

.box .item .content5 {
  box-sizing: border-box;
  height: 420px;
  margin: 30px 40px 37px 28px;
  background: url('../images/product/2_2.png') no-repeat;
}

.box .item .content6 {
  height: 590px;
  margin: 20px 20px 58px 20px;
  background: url('../images/product/2_3.png') no-repeat;
}

.box .item .content7 {
  height: 647px;
  margin: 30px 28px 27px 20px;
  background: url('../images/product/2_4.png') no-repeat;
}

.box .item .content8 {
  height: 460px;
  margin: 30px 28px 37px 41px;
  background: url('../images/product/2_5.png') no-repeat;
}

.box .item .content9 {
  height: 647px;
  margin: 0 12px 20px 12px;
  background: url('../images/product/2_6.png') no-repeat;
}

.div_show {
  display: block;
}