.section-head {
  position: relative;
  height: 0;
  padding-top: 34.9%;
}

.section-head > img {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

.yulu-box {
  overflow: hidden;
  padding-top: 70px;
  padding-bottom: 80px;
}

.yulu-content {
  font-size: 20px;
  line-height: 1.9;
  text-align: justify;
  text-indent: 2em;
}

.yulu-list {
  display: flex;
  margin: 50px -20px 0 -20px;
}

.yulu-item {
  width: 33.333333%;
  margin: 0 20px;
}

.yulu-item > img {
  width: 100%;
  height: 100%;
}

.case-box {
  background-color: #fbfbfb;
  padding: 80px 0 100px;
  overflow: hidden;
}

.case-head {
  text-align: center;
}

.section-title {
  position: relative;
  display: inline-block;
  height: 58px;
  line-height: 22px;
}

.section-title::after {
  content: '';
  position: absolute;
  left: calc(50% - 25px);
  bottom: 0;
  width: 50px;
  height: 4px;
  background-color: #057fff;
}

.case-list {
  display: flex;
  flex-wrap: wrap;
  margin: 50px -26px 0;
}

.case-item {
  position: relative;
  width: calc(33.333333% - 52px);
  /*margin: 0 26px 52px;*/
  margin: 0 26px 26px;
}

.case-item > a {
  display: block;
  background-color: #fff;
}

.case-item > a:hover .case-title {
  color: #057fff;
}

.case-fig {
  position: relative;
  width: 100%;
  height: 0 !important;
  padding-top: 70.6%;
  box-sizing: border-box;
  background-color: #a2a2a2;
}

.case-img {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}

.case-title {
  /*font-size: 24px;*/
  font-size: 18px;
  line-height: 1.6;
  /*height: 76px;*/
  height: 24px;
  padding: 9px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

.case-more-wrap {
  margin-top: -50px;
  height: 0;
  overflow: hidden;
  transition: height ease .3s;
}

.case-more {
  text-align: center;
  margin-top: 50px;
}

.case-more-link {
  display: inline-block;
  width: 168px;
  height: 34px;
  line-height: 34px;
  background-color: #057fff;
  border-radius: 20px;
  font-size: 14px;
  color: #fff;
  text-align: center;
  cursor: pointer;
}

.case-more-link:hover {
  opacity: .9;
}

.case-more-link:active {
  opacity: 1;
}

.cooperate-box {
    background-color: white;
}
.cooperate-container {
    margin-top: 10px;
}
.cooperate-container .cooperate-list {
    margin-top: 0;
}
.cooperate-list {
    display: grid;
    justify-content: space-around;
    grid-template-columns: repeat(auto-fill, 13.4%);
    grid-gap: 12px;
    margin-top: 80px;
}
.cooperate-list .cooperate-item {
    border: 1px solid #d5d5d5;
    flex: 0 0 11%;
    height: 121px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.cooperate-list .cooperate-item img {
    max-width: 80%;
}

@media only screen and (max-width: 1440px) {
  .section-title {
    height: 52px;
  }
}

@media only screen and (max-width: 1200px) {
  .yulu-box {
    padding-top: 36px;
    padding-bottom: 60px;
  }
  .yulu-list {
    margin: 36px -10px 0 -10px;
  }
  .yulu-item {
    margin: 0 10px;
  }
  .case-box {
    padding: 36px 0 60px;
  }
  .section-title {
    height: 45px;
  }
  .case-list {
    margin: 30px -10px 30px;
  }
  .case-item {
    width: calc(33.333333% - 20px);
    margin: 0 10px 20px;
  }
}