.sutong-cases {
  padding: 65px 0;
  position: relative
}

.sutong-cases .more1 {
  padding: 0 40px;
  height: 64px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  border: 1px solid #dbe0e3;
  font-size: 15px;
  color: #212121;
  font-weight: 700
}

.sutong-cases .more1 span {
  width: 13px;
  height: 12px;
  background: #67a7b3;
  margin-right: 10px
}

.sutong-cases .more1 span:last-child {
  margin-right: 27px
}

.sutong-cases .more1:hover {
  background: #67a7b3;
  border-color: #67a7b3;
  color: #fff
}

.sutong-cases .more1:hover span {
  background: #fff
}

.sutong-cases .tit {
  text-align: center;
  height: 75px;
  overflow: hidden;
  border-bottom: 1px solid #eaedef
}

.sutong-cases .tit h4 {
  color: #fff;
  font-size: 98px;
  font-weight: 700;
  line-height: 1;
  text-shadow: rgba(210, 217, 221, .75) 1px 0 0, rgba(210, 217, 221, .75) 0 1px 0, rgba(210, 217, 221, .75) -1px 0 0, rgba(210, 217, 221, .75) 0 -1px 0
}

.sutong-cases .top {
  margin: 65px 0 0;
  display: flex;
  justify-content: space-between
}

.sutong-cases .t {
  width: 685px
}

.sutong-cases .t h3 {
  font-size: 40px;
  color: #212121;
  font-weight: 700;
  line-height: 1;
  position: relative;
  z-index: 20
}

.sutong-cases .t h3::after {
  display: block;
  content: '';
  width: 80px;
  height: 2px;
  background: #67a7b3;
  margin: 10px auto 0 0
}

.sutong-cases .t .more1 {
  margin: 34px 0 0
}

.sutong-cases .top .txt {
  flex: 1;
  margin-left: 15px;
  font-size: 17px;
  color: #666;
  line-height: 36px
}

.sutong-cases ul {
  margin: 75px -20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap
}

.sutong-cases ul li {
  width: 33.3333%;
  padding: 15px 20px
}

.sutong-cases ul li>a {
  position: relative;
  overflow: hidden;
  display: block
}

.sutong-cases ul li img {
  display: block;
  width: 100%
}

.sutong-cases ul li .txt {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  z-index: 105;
  padding: 0 34px 29px;
  transition: opacity .2s, transform .35s;
  display: flex;
  justify-content: flex-end;
  -webkit-flex-direction: column;
  flex-direction: column
}

.sutong-cases ul li .txt::after {
  content: "";
  background: rgba(80, 169, 181, .85);
  height: 0;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  transition: all .3s ease 0s
}

.sutong-cases ul li .txt>* {
  position: relative;
  z-index: 10
}

.sutong-cases ul li .txt h6 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  text-shadow: 2px 2px 4px #666;
}

.sutong-cases ul li .txt p {
  font-size: 15px;
  color: #fff;
  line-height: 28px;
  height: 0;
  overflow: hidden;
  transition: all .5s ease 0s;
  margin: 15px 0 0
}

.sutong-cases ul li .txt .more {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  margin: 25px 0 0;
  text-shadow: 2px 2px 4px #666;
}

.sutong-cases ul li .txt .more i {
  color: #fff;
  font-size: 12px;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  border: 1px solid #fff;
  line-height: 24px;
  display: inline-block;
  text-align: center;
  margin-right: 20px
}

.sutong-cases ul li:hover .txt::after {
  height: 100%
}

.sutong-cases ul li:hover .txt p {
  height: 112px
}

.sutong-cases ul li:hover .more i {
  background: #fafbfb;
  color: #4fa8b4;
  border-color: #fafbfb
}


@media screen and (max-width: 1600px) {

  .sutong-cases .t,
  .indexF .t {
    width: 635px
  }
}

@media screen and (max-width: 1500px) {

  .sutong-cases .t {
    width: 560px
  }
}

@media screen and (max-width: 1441px) {

  .sutong-cases .tit h4 {
    font-size: 90px
  }

  .sutong-cases .t h3 {
    font-size: 38px
  }


  .sutong-cases .more1 {
    padding: 0 35px
  }

  .sutong-cases .t {
    width: 540px
  }
}

@media screen and (max-width: 1367px) {
  .sutong-cases .tit h4 {
    font-size: 80px
  }

  .sutong-cases .t h3 {
    font-size: 36px
  }

  .sutong-cases .t {
    width: 520px
  }

  .sutong-cases .tit {
    height: 65px
  }

  .sutong-cases ul {
    margin: 50px -20px 0
  }

  .sutong-cases ul li .txt h6 {
    font-size: 19px
  }

  .sutong-cases ul li .txt p {
    line-height: 26px
  }
}

@media screen and (max-width: 1281px) {

  .sutong-cases .tit h4 {
    font-size: 70px
  }

  .sutong-cases .t h3 {
    font-size: 34px
  }

  .sutong-cases .tit {
    height: 60px
  }

  .sutong-cases .top .txt {
    line-height: 32px
  }

  .sutong-cases .t,
  .indexF .t {
    width: 500px
  }


  .sutong-cases ul {
    margin: 48px -15px 0
  }

  .sutong-cases ul li {
    padding: 12px 15px
  }

  .sutong-cases ul li .txt {
    padding: 0 25px 20px
  }

  .sutong-cases ul li .txt p {
    line-height: 23px
  }

  .sutong-cases ul li .txt .more {
    margin: 20px 0 0
  }
}

@media screen and (max-width: 1171px) {

  .sutong-cases .tit h4 {
    font-size: 60px
  }

  .sutong-cases .t h3 {
    font-size: 32px
  }

  .sutong-cases .tit {
    height: 50px
  }

  .sutong-cases .t {
    width: 480px
  }

  .sutong-cases .top .txt {
    line-height: 30px
  }


  .sutong-cases ul li .txt p {
    margin: 0
  }
}

@media screen and (max-width: 992px) {

  .sutong-cases .top .txt {
    line-height: 30px
  }


  .sutong-cases .t {
    width: 100%
  }

  .sutong-cases .t {
    text-align: center
  }

  .sutong-cases .t h3::after {
    margin: 10px auto 0
  }

  .sutong-cases .top .txt {
    margin: 15px 0 0;
    line-height: 28px
  }

  .sutong-cases ul {
    margin: 25px -15px 0
  }

  .sutong-cases ul li .txt {
    padding: 0 20px 18px
  }

  .sutong-cases ul li .txt .more {
    display: none
  }

  .sutong-cases .top {
    margin: 45px 0 0;
    display: block
  }
}

@media screen and (max-width: 768px) {
  .sutong-cases .more1 {
    padding: 0 30px;
    height: 50px
  }

  .sutong-cases .tit h4 {
    font-size: 50px
  }

  .sutong-cases .t h3 {
    font-size: 28px
  }

  .sutong-cases .tit {
    height: 45px
  }

  .sutong-cases .top .txt {
    line-height: 28px
  }


  .sutong-cases {
    padding: 40px 0 30px
  }

  .sutong-cases .top {
    margin: 30px 0 0
  }

  .sutong-cases .t h3::after {
    margin: 15px auto 0
  }

  .sutong-cases .t .more1 {
    margin: 25px 0 0
  }

  .sutong-cases .top .txt {
    margin: 15px 0 0;
    font-size: 16px
  }

  .sutong-cases ul {
    margin: 20px -10px 0
  }

  .sutong-cases ul li {
    width: 50%;
    padding: 10px
  }

  .sutong-cases ul li .txt {
    padding: 0 15px 15px
  }

  .sutong-cases ul li .txt h6 {
    font-size: 18px
  }
}

@media screen and (max-width: 768px) {

  .sutong-cases ul li .txt h6 {
    font-size: 18px
  }
}

@media screen and (max-width: 576px) {

  .sutong-cases .t h3 {
    font-size: 26px
  }

  .sutong-cases .tit h4 {
    font-size: 40px
  }

  .sutong-cases .tit {
    height: 35px
  }


  .sutong-cases ul li .txt .more {
    display: none
  }

  .sutong-cases ul li .txt h6 {
    font-size: 17px
  }
}

@media screen and (max-width: 480px) {

  .sutong-cases .more1 {
    padding: 0 25px
  }

  .sutong-cases .t h3 {
    font-size: 24px
  }

  .sutong-cases .tit h4 {
    font-size: 30px
  }

  .sutong-cases .tit {
    height: 25px
  }

  .sutong-cases ul {
    margin: 14px 0 0
  }

  .sutong-cases ul li {
    width: 100%;
    padding: 6px 0
  }
  
  .sutong-cases .top .txt {
        margin: 15px 0 0;
        font-size: 12px;
        line-height: 24px;
    }
}