* {
  margin: 0;
  padding: 0;
  font-family: 'Microsoft Yahei', 'simsun', 'arial', 'tahoma';
}
li {
  list-style: none;
}
a {
  text-decoration: none;
}
.container {
  width: 1200px;
  margin: 0 auto;
}
.container .casetop {
  /*padding-top: 190px;*/
  height: 60px;
  text-align: center;
}
.container .casetop .title {
  font-weight: 700;
  color: #4b4a5c;
  font-size: 29px;
}
.container .casetop .f_title {
  margin-top: 20px;
  color: #4b4a5c;
  font-size: 16px;
}
.container .casemain {
  width: 100%;
  margin-bottom: 130px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
.container .casemain li {
  width: calc(25% - 33px);
  height: 488px;
  float: left;
  border: 1px solid #e5e5e5;
  cursor: pointer;
  margin-bottom: 30px;
}
.container .casemain li .show {
  height: 418px;
  text-align: center;
  padding: 70px 45px 0px 45px;
  position: relative;
}
.container .casemain li .show .title {
  margin-top: 55px;
  font-size: 22px;
  font-weight: 700;
}
.container .casemain li .show .title i {
  display: block;
  width: 25px;
  height: 5px;
  background-color: #000;
  margin: 15px auto;
}
.container .casemain li .show p {
  margin-top: 10px;
  font-size: 14px;
  color: #888;
  line-height: 24px;
}
.container .casemain li .show .btn {
  position: absolute;
  bottom: 15px;
  left: 65px;
  width: 100%;
}
.container .casemain li .show .btn .btn1 {
  margin: 0 13px;
  color: #888;
  font-size: 12px;
  line-height: 23px;
  float: left;
  width: 73px;
  height: 23px;
  border: 1px solid #888;
}
.container .casemain li .noneimg {
  display: none;
  height: 488px;
}
.container .casemain li .noneimg img {
  height: 488px;
  width: auto;
}
.container .casemain li:hover .show {
  display: none;
}
.container .casemain li:hover .noneimg {
  display: block;
}