.index-title {
  width: 315px;
  height: 38px;
  font-size: 38px;
  font-weight: 400;
  color: #0a1a3c;
  line-height: 38px;
  background-image: url('../../imgs/comm/titleBg.png');
  background-size: 315px 24px;
  background-repeat: no-repeat;
  margin: 0 auto;
  text-align: center;
  background-position-y: center;
  margin-top: 100px;
}
.index-sub-title {
  height: 20px;
  font-size: 20px;
  font-weight: 400;
  color: #0a1a3c;
  line-height: 20px;
  margin: 0 auto;
  text-align: center;
  margin-top: 18px;
}
.index-title-large {
  width: 525px;
  height: 38px;
  background-image: url('../../imgs/comm/titleBgLarge.png');
  background-size: 525px 24px;
}
.more-module {
  font-size: 20px;
  font-weight: 400;
  color: #2967ff;
  line-height: 20px;
  margin: 28px 0 40px 0;
  cursor: pointer;
}
.more-module img {
  height: 10px;
  margin-left: 10px;
}
.first-choice {
  width: 1202px;
  margin: 0 auto;
}
.first-choice .choice-item {
  width: 192px;
  height: 139px;
  user-select: none;
  position: relative;
  cursor: pointer;
}
.first-choice .choice-item img {
  width: 100%;
  height: 100%;
  display: block;
}
.first-choice .choice-item .title {
  position: absolute;
  bottom: 25px;
  left: 50%;
  transform: translateX(-50%);
  height: 22px;
  font-size: 18px;
  font-weight: 400;
  color: #333333;
  line-height: 22px;
}
.advantage {
  width: 1200px;
  justify-content: center;
  margin: 0 auto;
  margin-top: 50px;
}
.advantage .advantage-item {
  cursor: pointer;
  overflow: hidden;
  height: 320px;
  margin-right: 2px;
}
.advantage .advantage-item .large-card {
  width: 286px;
  height: 320px;
  background-image: url('../../imgs/index/advantage-l-1.png');
  background-size: 100% 100%;
  background-repeat: no-repeat;
  display: none;
  padding: 36px 30px 36px 36px;
}
.advantage .advantage-item .large-card .title {
  font-size: 18px;
  font-weight: 500;
  color: #ffffff;
  line-height: 28px;
}
.advantage .advantage-item .large-card .line {
  margin: 18px 0;
  width: 100px;
  height: 2px;
  background: #ffffff;
}
.advantage .advantage-item .large-card .desc {
  font-size: 14px;
  font-weight: 400;
  color: #ffffff;
  line-height: 30px;
}
.advantage .advantage-item .small-card {
  width: 150px;
  height: 320px;
  background-image: url('../../imgs/index/advantage-s-1.png');
  background-size: 100% 100%;
  background-repeat: no-repeat;
  position: relative;
  padding: 58px 56px 0 15px;
  font-size: 18px;
  font-weight: 500;
  color: #000;
  line-height: 28px;
}
.advantage .advantage-item .small-card::after {
  position: absolute;
  top: 0;
  left: 0;
  width: 150px;
  height: 320px;
  content: '';
  background: linear-gradient(180deg, rgba(205, 228, 255, 0.7) 0%, rgba(205, 228, 255, 0.1) 100%);
  border-radius: 4px;
  border: 1px solid;
  border-image: linear-gradient(180deg, #ffffff, #e1eaff) 1 1;
}
.advantage .advantage-item:nth-child(1) .large-card {
  display: block;
  background-image: url('../../imgs/index/advantage-l-1.png');
}
.advantage .advantage-item:nth-child(1) .small-card {
  display: none;
  background-image: url('../../imgs/index/advantage-s-1.png');
}
.advantage .advantage-item:nth-child(2) .large-card {
  background-image: url('../../imgs/index/advantage-l-2.png');
}
.advantage .advantage-item:nth-child(2) .small-card {
  background-image: url('../../imgs/index/advantage-s-2.png');
}
.advantage .advantage-item:nth-child(3) .large-card {
  background-image: url('../../imgs/index/advantage-l-3.png');
}
.advantage .advantage-item:nth-child(3) .small-card {
  background-image: url('../../imgs/index/advantage-s-3.png');
}
.advantage .advantage-item:nth-child(4) .large-card {
  background-image: url('../../imgs/index/advantage-l-4.png');
}
.advantage .advantage-item:nth-child(4) .small-card {
  background-image: url('../../imgs/index/advantage-s-4.png');
}
.advantage .advantage-item:nth-child(5) .large-card {
  background-image: url('../../imgs/index/advantage-l-5.png');
}
.advantage .advantage-item:nth-child(5) .small-card {
  background-image: url('../../imgs/index/advantage-s-5.png');
}
.advantage .advantage-item:nth-child(6) .large-card {
  background-image: url('../../imgs/index/advantage-l-6.png');
}
.advantage .advantage-item:nth-child(6) .small-card {
  background-image: url('../../imgs/index/advantage-s-6.png');
}
.advantage .advantage-item:nth-child(7) .large-card {
  background-image: url('../../imgs/index/advantage-l-7.png');
}
.advantage .advantage-item:nth-child(7) .small-card {
  background-image: url('../../imgs/index/advantage-s-7.png');
}
.platform-display {
  width: 980px;
  margin: 0 auto;
  margin-top: 49px;
}
.platform-display img {
  display: block;
}
.customer-case {
  width: 1478px;
  margin: 0 auto;
  margin-top: 49px;
}
.customer-case img {
  display: block;
}
.contact-us {
  width: 100%;
  margin-top: 50px;
  padding-top: 57px;
  padding-bottom: 52px;
  background-image: url('../../imgs/index/contact-us.png');
  background-size: cover;
  background-repeat: no-repeat;
  text-align: center;
  color: #ffffff;
}
.contact-us .title {
  font-size: 38px;
  line-height: 40px;
}
.contact-us .sub-title {
  margin: 0 auto;
  justify-content: center;
  margin-top: 23px;
  font-size: 20px;
  font-weight: 500;
  color: #ffffff;
  line-height: 24px;
}
.contact-us .sub-title .line {
  width: 1px;
  height: 24px;
  background: #ffffff;
  margin: 0 20px;
}
.contact-us .btn {
  width: 114px;
  height: 44px;
  border-radius: 2px;
  border: 1px solid #ffffff;
  font-size: 16px;
  font-weight: 500;
  color: #ffffff;
  line-height: 44px;
  margin: 0 auto;
  margin-top: 40px;
  cursor: pointer;
}
@media (min-width: 800px) {
  .index {
    display: flex;
    flex-direction: column;
    width: 100%;
    align-items: center;
  }
}
@media (max-width: 800px) {
  .index {
    display: flex;
    flex-direction: column;
    width: 100%;
    align-items: center;
  }
}