.product-introduce-title {
  justify-content: center;
  align-items: center;
}
.product-introduce-title .teaching-scenarios {
  margin: 0 60px;
  text-align: center;
}
.product-introduce-title .teaching-scenarios div:nth-child(1) {
  font-weight: bold;
  font-size: 36px;
  color: #30374a;
  line-height: 50px;
}
.product-introduce-title .teaching-scenarios div:nth-child(2) {
  font-weight: 400;
  font-size: 16px;
  color: #999999;
  line-height: 22px;
  margin-top: 5px;
}
.product-introduce {
  padding: 49px 0px 60px 0px;
  background-color: #f4f9ff;
  margin-top: -2px;
}
.product-introduce .precision-teaching-system {
  font-weight: 400;
  font-size: 16px;
  color: #30374a;
  line-height: 32px;
  text-indent: 2em;
  margin: 97px 0px 53px 0px;
}
.product-introduce .precision-teaching-product {
  text-align: center;
}
.product-architecture {
  padding: 186px 0px 60px 0px;
}
.product-architecture .before-class-middle {
  justify-content: space-between;
  align-items: center;
  margin-top: 60px;
}
.product-architecture .before-class-middle .big-data-collection {
  flex-direction: column;
  row-gap: 17px;
}
.product-architecture .before-class-middle .big-data-collection li {
  position: relative;
  width: 257px;
  height: 88px;
  padding: 22px 28px;
  border: 1px solid #2e7aff;
}
.product-architecture .before-class-middle .big-data-collection li div:nth-child(1) {
  font-weight: 400;
  font-size: 24px;
  color: #30374a;
  line-height: 32px;
}
.product-architecture .before-class-middle .big-data-collection li div:nth-child(2),
.product-architecture .before-class-middle .big-data-collection li div:nth-child(3) {
  font-weight: 400;
  font-size: 16px;
  color: #555555;
  line-height: 22px;
}
.product-architecture .before-class-middle .big-data-collection li div:nth-child(2) {
  margin: 9px 0px;
}
.product-architecture .before-class-middle .big-data-collection li div:nth-child(4) {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}
.product-architecture .before-class-middle .big-data-collection li div:nth-child(4) img {
  height: 132px;
}
.product-architecture .before-class-middle .big-data-collection li:hover {
  border: 1px solid #ffffff;
}
.product-architecture .before-class-middle .big-data-collection li:hover div:nth-child(1) {
  color: #2e7aff;
}
.product-architecture .before-class-middle .big-data-collection li:hover div:nth-child(4) {
  color: #2e7aff;
  opacity: 1;
}
.product-architecture .before-class-middle .precision-teaching-arch {
  margin-left: 40px;
}
.teaching-resources {
  padding: 49px 0px 8px 0px;
  background-color: #f4f9ff;
}
.teaching-resources .product-introduce-title {
  margin-bottom: 49px;
}
.teaching-resources .facing-whole-country {
  font-weight: 400;
  font-size: 16px;
  color: #30374a;
  line-height: 32px;
  text-indent: 2em;
  margin: 0px auto;
}
.teaching-resources .real-time-updates-img {
  align-items: center;
  margin-top: 8px;
}
.teaching-resources .real-time-updates-img .precision-teaching-img {
  margin-left: -13px;
}
.teaching-resources .real-time-updates-img .real-time-updates li {
  margin-bottom: 20px;
}
.teaching-resources .real-time-updates-img .real-time-updates li p:nth-child(1) {
  font-weight: bold;
  font-size: 20px;
  color: #2e7aff;
  line-height: 28px;
  display: flex;
  align-items: center;
}
.teaching-resources .real-time-updates-img .real-time-updates li p:nth-child(1)::before {
  content: "";
  display: block;
  width: 10px;
  height: 10px;
  background-color: #2e7aff;
  border-radius: 50%;
  margin-right: 10px;
}
.teaching-resources .real-time-updates-img .real-time-updates li p:nth-child(2) {
  font-weight: 400;
  font-size: 18px;
  color: #5a5a5a;
  line-height: 32px;
  text-align: left;
  margin: 12px 0px 19px 0px;
}
.teaching-resources .real-time-updates-img .real-time-updates li .grey-line {
  position: relative;
  width: 646px;
  border: 1px solid #bed6ff;
}
.teaching-resources .real-time-updates-img .real-time-updates li .grey-line .blue-line {
  position: absolute;
  top: -2.5px;
  left: 0;
  width: 206px;
  height: 0px;
  border: 3px solid #2e7aff;
}
.product-advantages {
  padding: 54px 0px 140px 0px;
}
.product-advantages .efficient-classroom {
  margin-top: 80px;
  flex-wrap: wrap;
  justify-content: space-between;
  row-gap: 26px;
}
.product-advantages .efficient-classroom li {
  width: 515px;
  height: 101px;
  padding: 30px 36px;
  background-color: #f4f9ff;
  border-radius: 15px 15px 15px 15px;
  display: flex;
  align-items: center;
}
.product-advantages .efficient-classroom li .lesson-preparation {
  margin-left: 37px;
}
.product-advantages .efficient-classroom li .lesson-preparation p:nth-child(1) {
  font-weight: bold;
  font-size: 24px;
  color: #30374a;
  line-height: 33px;
}
.product-advantages .efficient-classroom li .lesson-preparation p:nth-child(2) {
  font-weight: 400;
  font-size: 16px;
  color: #555555;
  line-height: 28px;
  margin-top: 11px;
}