.science {
  margin: 0 auto;
  box-sizing: border-box;
  width: 100%;
}

.section-1 {
  width: 100%;
  height: 584px;
  padding-top: 170px;
  padding-bottom: 60px;
}

.title {
  font-family: SourceHanSansCN-Bold;
  font-size: 28px;
  color: #22437D;
  letter-spacing: 2px;
  text-align: left;
  line-height: 28px;
  font-weight: 700;
  margin-bottom: 86.67px;
}

.desc {
  font-family: MicrosoftYaHei;
  font-size: 14px;
  color: #22437D;
  letter-spacing: 0.06px;
  line-height: 14px;
  font-weight: 400;
}

.img-1 {
  width: 1024px;
  height: 410px;
  margin-top: 45px;
}

.section-2 {
  height: 532px;
  padding-top: 54px;
  padding-bottom: 56px;
}

.img-2 {
  width: 1024px;
  height: 384px;
  margin-top: 54px;
}

.comment {
  margin-top: 20px;
}

.comment div, .comment div span {
  font-family: MicrosoftYaHei;
  font-size: 12px;
  color: #22437D;
  letter-spacing: 0.06px;
  text-align: left;
  line-height: 12px;
  font-weight: 400;
  margin-bottom: 12px;
}

.section-3 {
  height: 660px;
  padding-top: 62px;
  padding-bottom: 34px;
}

.img-3 {
  margin-top: 34px;
  width: 1024px;
  height: 376px;
}

.subtitle {
  margin-top: 11px;
  font-family: MicrosoftYaHei;
  font-size: 12px;
  color: #22437D;
  letter-spacing: 0.06px;
  text-align: left;
  line-height: 12px;
  font-weight: 400;
  margin-bottom: 34px;
}

.back-top {
  margin-top: 75px;
}

.mobile-science {
  display: none;
}