h2 {
  font-size: 30px;
  text-align: center;
  color: #000;
  line-height: 30px;
}
.banner {
  background-image: url(../pic/about/banner_about_us.jpg);
  background-position: center;
  background-size: cover;
  height: 400px;
}
.about-us {
  padding: 100px 0 0;
}
.about-us p {
  font-size: 16px;
  line-height: 32px;
  color: #666;
  margin-top: 50px;
  text-align: center;
}
.technology {
  padding: 100px 0 0;
}
.technology .row {
  display: flex;
  justify-content: space-between;
  padding-top: 60px;
}
.technology .row .technology-item {
  flex: 1;
  height: 240px;
  border: 1px solid #e5e5e5;
  margin-left: -1px;
  text-align: center;
}
.technology .row .technology-item i {
  display: inline-block;
  height: 48px;
  width: 48px;
  background: no-repeat;
  background-position: center;
  background-size: contain;
  margin-top: 64px;
}
.technology .row .technology-item .line {
  width: 20px;
  height: 4px;
  border-radius: 2px;
  background-image: linear-gradient(to right, #3d42ff, #17ecff);
  margin: 16px auto 20px;
}
.technology .row .technology-item p {
  font-size: 20px;
  color: #666;
  line-height: 20px;
}
.advantage {
  padding: 100px 0 100px;
}
.advantage .advantage-wrapper {
  padding-top: 60px;
  display: flex;
  justify-content: space-between;
}
.advantage .advantage-wrapper .advantage-item {
  width: 360px;
  height: 120px;
  border: 1px solid #e5e5e5;
  padding: 30px 34px;
}
.advantage .advantage-wrapper .advantage-item img {
  width: 50px;
  height: 50px;
  vertical-align: -6%;
}
.advantage .advantage-wrapper .advantage-item p {
  display: inline-block;
  color: #666;
  margin-left: 30px;
  line-height: 34px;
  font-size: 18px;
}
@media screen and (max-width: 767px) {
  .about-us {
    padding: 70px 0 0;
  }
  .about-us p {
    margin-top: 40px;
  }
  .technology {
    padding: 70px 0 0;
  }
  .technology .row {
    flex-wrap: wrap;
    padding-top: 40px;
  }
  .technology .row .technology-item i {
    height: 36px;
    margin-top: 50px;
  }
  .technology .row .technology-item p {
    line-height: 30px;
  }
  .advantage {
    padding: 70px 0 70px;
  }
  .advantage .advantage-wrapper {
    padding-top: 20px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .advantage .advantage-wrapper .advantage-item {
    margin-top: 20px;
  }
}
@media screen and (max-width: 1199px) {
  .advantage .advantage-wrapper .advantage-item {
    padding: 30px 15px;
  }
  .advantage .advantage-wrapper .advantage-item p {
    margin-left: 15px;
  }
}