.case {
  background: #f2f2f2;
  padding: 100px 0;
  color: #666;
}
.case .container h4 {
  font-size: 34px;
  color: #4c4a49;
  font-weight: normal;
}
.case .container h4:before {
  content: '';
  display: inline-block;
  margin-left: -60px;
  margin-right: 10px;
  width: 50px;
  height: 1px;
  background: #4c4a49;
  vertical-align: super;
}
.case_fl {
  margin-top: 100px;
  padding-bottom: 100px;
}
.case_fl li.cur b {
  background-color: #ff6b00;
}
.case_fl li.cur span {
  transform: scale(1) translateZ(0);
}
.case_fl li.cur i {
  display: none;
}
.case_fl li.cur a div p {
  color: #ff6b00;
}
.case_fl li {
  float: left;
  width: 13%;
  margin-right: 4.4%;
}
.case_fl li:last-child {
  margin-right: 0;
}
.case_fl li:hover > div {
  display: block;
}
.case_fl li:hover b {
  background-color: #ff6b00;
}
.case_fl li:hover span {
  transform: scale(1) translateZ(0);
}
.case_fl li:hover i {
  display: none;
}
.case_fl li:hover a div p {
  color: #ff6b00;
}
.case_fl li a {
  display: block;
  height: 100%;
}
.case_fl li a div {
  position: relative;
  width: 49%;
  height: 75px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.case_fl li a div i {
  position: absolute;
  width: 100%;
  height: 1px;
  left: 0;
  background: #4c4a49;
}
.case_fl li a div i:first-child {
  top: 0;
}
.case_fl li a div i:last-child {
  bottom: 0;
}
.case_fl li a div p {
  font-size: 14px;
  color: #414141;
  text-align: right;
}
.case_fl li a div span {
  position: absolute;
  width: 100%;
  height: 1px;
  left: 0;
  background: #ff6b00;
  transform: scale(0) translateZ(0);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.case_fl li a div span:nth-child(2) {
  top: 0;
  transform-origin: 0 100%;
}
.case_fl li a div span:nth-child(4) {
  bottom: 0;
  transform-origin: 100% 0;
}
.case_fl li a b {
  width: 49%;
  height: 75px;
  background-color: #4c4a49;
}
.case_fl li a b.cur {
  background-color: #ff6b00;
}
.c_search form {
  position: relative;
}
.c_search form input {
  float: left;
  border: 1px solid #817f7f;
  height: 30px;
  border-right: 0;
  margin-right: 30px;
  background: transparent;
}
.c_search form button {
  position: absolute;
  right: 0;
  top: 0;
  height: 30px;
  width: 30px;
  border: 1px solid #817f7f;
  background: url(../images/search2.png) no-repeat center center;
}
.list li {
  float: left;
  width: 48%;
  margin-bottom: 50px;
}
.list li:hover a:nth-child(1) p {
  display: flex;
}
.list li img {
  width: 100%;
}
.list li:nth-child(2n-1) {
  margin-right: 4%;
}
.list li a:nth-child(1) {
  position: relative;
  display: block;
  height: 100%;
  margin-bottom: 15px;
}
.list li a:nth-child(1) p {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
}
.list li a:nth-child(1) p b {
  display: inline-block;
  width: 75px;
  height: 75px;
}
.list li a:nth-child(2) {
  font-size: 15px;
  color: #282828;
}
.list li a:nth-child(2):hover {
  color: #ff6b00;
}
.list li a:nth-child(2):before {
  content: '';
  display: inline-block;
  margin-right: 10px;
  width: 10px;
  height: 1px;
  background: #282828;
  vertical-align: middle;
}
.list li span {
  display: block;
  margin-bottom: 5px;
  color: #282828;
}
.list li span:nth-child(2) {
  font-size: 15px;
}
.list li span:before {
  content: '';
  display: inline-block;
  margin-right: 10px;
  width: 10px;
  height: 1px;
  background: #282828;
  vertical-align: middle;
}
.page {
  margin-top: 30px;
  text-align: center;
}
.page a {
  display: inline-block;
  padding: 5px 10px;
  background: linear-gradient(to bottom, #fff 0%, #f0f0f0 100%);
  border: 1px solid #ddd;
  margin: 0 5px;
  color: #4c4a49;
  font-size: 14px;
  border-radius: 2px;
}
.page a:hover {
  color: #ff6b00;
}
.page .cur {
  color: #ff6b00;
}
.case_detail {
  text-align: center;
}
.case_detail > img {
  width: 100%;
}
.content {
  color: #282828;
  text-align: left;
  margin: 60px 0;
}
.content h5 {
  font-size: 22px;
  font-weight: normal;
  color: #ff6b00;
  margin-bottom: 15px;
}
.content b {
  font-style: normal;
  font-size: 14px;
  margin-right: 20px;
  font-weight: normal;
  display: inline-block;
  margin-bottom: 20px;
}
.content b:before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 5px;
  background: #ff6b00;
}
.content p {
  width: 60%;
}
.content div > img {
  width: 100%;
  margin-bottom: 40px;
}
@media screen and (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  .case {
    padding: 40px 0;
  }
  .case .container h4 {
    font-size: 18px;
    margin-left: 15px;
  }
  .case .container h4:before {
    margin-left: -14px;
    width: 18px;
  }
  .case_fl {
    margin-top: 35px;
    padding-bottom: 35px;
  }
  .case_fl li {
    width: 45%;
    margin-right: 10%;
    margin-bottom: 20px;
  }
  .case_fl li:last-child {
    margin-right: 10%;
  }
  .case_fl li:nth-child(2n) {
    margin-right: 0;
  }
  .list li {
    margin-bottom: 25px;
  }
  .list li span:nth-child(2) {
    font-size: 14px;
  }
  .c_search {
    margin-bottom: 35px;
  }
  .content p {
    width: auto;
  }
  .content div > img {
    margin-bottom: 20px;
  height:auto;}
  .goback i {
    margin-right: -10%;
  }
  .content {
    margin: 40px 0;
  }
  .case_fl li a div i {
    left: 0;
  }
  .case_fl li a div span {
    left: 0;
  }
  .list li a:nth-child(2) {
    font-size: 14px;
  }
}