.about-content {
  width: 100%;
  background: #F9FDFF;
  height: 680px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-content .content {
  display: flex;
  width: 1200px;
  justify-content: space-between;
}

.about-content .left-info {
  width: 546px;
  font-family: PingFangSC-Regular;
  font-weight: 400;
  font-size: 20px;
  color: #666666;
  text-align: justify;
  line-height: 32px;
}

.about-content .left-info .title {
  width: 486px;
  font-family: PingFangSC-Medium;
  font-weight: 500;
  font-size: 54px;
  color: #222222;
  line-height: 76px;
  margin-bottom: 20px;
}

.about-content .right-info {
  width: 580px;
}

.about-content .right-info iframe {
  width: 100%;
  height: 326px;
}

.lock-overflow {}

.develop {
  width: 100%;
  background-color: #fff;
  height: 600px;
  min-height: 600px;
  padding: 60px 0 100px;
  box-sizing: border-box;
  overflow: hidden;
}

.develop-title {
  text-align: center;
  font-family: PingFangSC-Medium;
  font-weight: 500;
  font-size: 36px;
  color: #000000;
  text-align: center;
  line-height: 36px;
  margin-bottom: 80px;
}

.develop-content {
  display: flex;
  overflow: auto;
}

.develop-content::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.develop-content::-webkit-scrollbar-thumb {
  border: none;
}

.develop-item {
  display: flex;
  padding-right: 80px;
  flex-direction: column;
  position: relative;
}

.develop-year {
  font-family: D-DIN-Bold;
  font-weight: 700;
  font-size: 52px;
  color: #000000;
  margin-bottom: 24px;
  line-height: 52px;
  height: 52px;
  width: 105px;
  display: inline-block;
}

.develop-line {
  margin-bottom: 24px;
  width: 12px;
  height: 12px;
  background: #2672FF;
  border: 4px solid #2672ff33;
  margin-left: 50px;
  border-radius: 12px;
  background-clip: padding-box;
}

.develop-line::before {
  content: " ";
  height: 4px;
  background: #2672ff1a;
  display: inline-block;
  width: 56px;
  position: absolute;
  top: 84px;
  left: 0;
}

.develop-line::after {
  content: " ";
  height: 4px;
  background: #2672ff1a;
  display: inline-block;
  width: calc(100% - 64px);
  position: absolute;
  top: 84px;
  left: 64px;
}

.develop-list {
  font-family: PingFangSC-Regular;
  font-weight: 400;
  font-size: 18px;
  color: #666666;
  letter-spacing: 0;
  line-height: 34px;
  max-width: 480px;
  min-width: 480px;
}

.develop-list li {
  position: relative;
  padding-left: 20px;
}

.develop-list li::before {
  content: " ";
  width: 8px;
  height: 8px;
  background: #DBDBDB;
  border-radius: 4px;
  margin-right: 16px;
  display: inline-block;
  position: absolute;
  top: 13px;
  left: 0;
}
.develop-content .develop-item:first-child{
  margin-left: 300px;
}
.develop-content .develop-item:first-child .develop-line::before {
  display: none;
}

.develop-content .develop-item:last-child .develop-line::after {
  display: none;
}

@media (max-width: 768px) {
  .about-content {
    height: 572px;
    padding: 40px 16px 73px;
    box-sizing: border-box;
  }

  .about-content .content {
    flex-direction: column;
    width: 100%;
  }

  .about-content .left-info {
    width: 100%;
    font-size: 12px;
    line-height: 22px;
  }

  .about-content .left-info .title {
    font-size: 27px;
    line-height: 38px;
    text-align: center;
    width: 100%;
    padding: 40px 0 27px;
  }

  .about-content .right-info {
    margin-top: 40px;
    height: calc((100vw - 32px) * 193 / 343);
    width: 100%;
  }

  .about-content .right-info iframe {
    height: calc((100vw - 32px) * 193 / 343);
  }

  .develop {
    padding: 30px 0 50px;
    height: 509px;
    min-height: 509px;
  }

  .develop-content {
    padding: 0;
    overflow: visible;
  }

  .develop-title {
    font-size: 20px;
    line-height: 26px;
    margin-bottom: 30px;
  }

  .develop-item {
    display: flex !important;
    min-width: 100%;
    padding: 0 16px;
    align-items: center;
    box-sizing: border-box;
    position: relative;
  }
  .develop-content .develop-item:first-child{
    margin-left: 0;
  }

  .develop-year {
    font-size: 51px;
    margin-bottom: 9px;
    line-height: 51px;
    height: auto;
    width: auto;
  }

  .develop-line {
    margin-bottom: 14px;
    width: 10px;
    height: 10px;
    background: #2672FF;
    border: 3px solid #2672ff33;
    margin: 0;
    border-radius: 10px;
    background-clip: padding-box;
  }

  .develop-line::before {
    height: 3px;
    width: 50%;
    top: 66px;
    left: 0;
  }

  .develop-line::after {
    height: 3px;
    width: 50%;
    position: absolute;
    top: 66px;
    left: 50%;
  }

  .develop-list {
    font-size: 13px;
    line-height: 28px;
    max-width: 100%;
    min-width: 100%;
    margin: 14px;
  }

  .develop-list li {
    padding-left: 14px;
  }

  .develop-list li::before {
    margin-right: 6px;
    top: 10px;
  }
}