html {
  background-color: #f7f7f7;
}
.case_aa {
  margin-bottom: 4.166%;
  background: #fff;
  padding: 6.25% 0 4.1666% 0;
}
.case_aa .top {
  margin-bottom: 3.15%;
}
.case_aa .top .title_box {
  float: left;
}
.case_aa .top .title_box .title {
  color: #333333;
  font-size: 24px;
  padding-bottom: 25px;
  margin-bottom: 25px;
  position: relative;
}
.case_aa .top .title_box .title::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background-color: #999999;
  position: absolute;
  left: 0;
  bottom: 0;
}
.case_aa .top .title_box .text {
  color: #888888;
  font-size: 14px;
}
.case_aa .top .btn {
  display: block;
  float: right;
  width: 190px;
  height: 70px;
  line-height: 70px;
  text-align: center;
  font-size: 14px;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: bold;
  position: relative;
  background: url(../images/sekuai_06.png) no-repeat;
  color: #fff;
  -webkit-box-shadow: 6px 6px 6px rgba(47, 112, 174, 0.36);
     -moz-box-shadow: 6px 6px 6px rgba(47, 112, 174, 0.36);
          box-shadow: 6px 6px 6px rgba(47, 112, 174, 0.36);
  -webkit-transition: all 0.5s;
  -o-transition: all 0.5s;
  -moz-transition: all 0.5s;
  transition: all 0.5s;
  cursor: pointer;
}
.case_aa .top .btn .jt {
  position: absolute;
  right: 25%;
  top: 50%;
  -webkit-transform: translateY(-50%);
     -moz-transform: translateY(-50%);
      -ms-transform: translateY(-50%);
          transform: translateY(-50%);
  z-index: 10;
}
.case_aa .top .btn:hover {
  background: url(../images/sekuai_07.png) no-repeat;
  -webkit-box-shadow: 0px 0px 6px rgba(47, 112, 174, 0.36);
     -moz-box-shadow: 0px 0px 6px rgba(47, 112, 174, 0.36);
          box-shadow: 0px 0px 6px rgba(47, 112, 174, 0.36);
}
.case_bb {
  margin-bottom: 3.125%;
}
.case_bb .case_ul li {
  width: 22.5%;
  margin: 3.3333% 3.3333% 0 0;
  -webkit-box-shadow: 0px 5px 15px 0px rgba(0, 0, 0, 0.1);
     -moz-box-shadow: 0px 5px 15px 0px rgba(0, 0, 0, 0.1);
          box-shadow: 0px 5px 15px 0px rgba(0, 0, 0, 0.1);
  float: left;
}
.case_bb .case_ul li a {
  display: block;
  overflow: hidden;
}
.case_bb .case_ul li a img {
  display: block;
  width: 100%;
  -webkit-transition: all 0.5s;
  -o-transition: all 0.5s;
  -moz-transition: all 0.5s;
  transition: all 0.5s;
}
.case_bb .case_ul li .text_box {
  padding: 30px 30px 38px 30px;
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
  position: relative;
  overflow: hidden;
}
.case_bb .case_ul li .text_box span {
  display: block;
  margin-bottom: 20px;
}
.case_bb .case_ul li .text_box .title {
  color: #2f70ae;
  font-size: 18px;
  -webkit-transition: all 0.5s;
  -o-transition: all 0.5s;
  -moz-transition: all 0.5s;
  transition: all 0.5s;
  overflow: hidden;
  -o-text-overflow: ellipsis;
     text-overflow: ellipsis;
  white-space: nowrap;
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
  padding-left: 10px;
  border-left: 3px solid #2f70ae;
  font-weight: bold;
}
.case_bb .case_ul li .text_box .te {
  color: #333333;
  opacity: 0.6;
  font-size: 14px;
  line-height: 28px;
  height: 56px;
  margin-bottom: 0;
  overflow: hidden;
}
.case_bb .case_ul li .text_box::after {
  content: "";
  display: block;
  -webkit-transition: all 0.3s;
  -o-transition: all 0.3s;
  -moz-transition: all 0.3s;
  transition: all 0.3s;
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 100%;
  background: url(../images/sekuai_08.png) no-repeat;
  -webkit-background-size: 100% 100%;
     -moz-background-size: 100% 100%;
          background-size: 100% 100%;
  z-index: -1;
}
.case_bb .case_ul li:nth-child(4n) {
  margin-right: 0;
}
.case_bb .case_ul li:nth-child(1),
.case_bb .case_ul li:nth-child(2),
.case_bb .case_ul li:nth-child(3),
.case_bb .case_ul li:nth-child(4) {
  margin-top: 0;
}
.case_bb .case_ul li:hover .text_box .title {
  color: #fff;
  border-left: 3px solid #fff;
}
.case_bb .case_ul li:hover .text_box .te {
  color: #fff;
}
.case_bb .case_ul li:hover .text_box::after {
  top: 0;
}
@media screen and (max-width: 1024px) {
  .case_bb .case_ul li {
    width: 31.1111%;
  }
  .case_bb .case_ul li:nth-child(4n) {
    margin-right: 3.3333%;
  }
  .case_bb .case_ul li:nth-child(4) {
    margin-top: 3.3333%;
  }
  .case_bb .case_ul li:nth-child(3n) {
    margin-right: 0;
  }
}
@media screen and (max-width: 768px) {
  .case_aa {
    padding: 8% 0;
  }
  .case_aa .top {
    margin-bottom: 20px;
  }
  .case_aa .top .title_box {
    float: none;
    margin-bottom: 20px;
  }
  .case_aa .top .btn {
    float: none;
    width: 100%;
    height: 44px;
    line-height: 44px;
    -webkit-background-size: 100% 100%!important;
       -moz-background-size: 100% 100%!important;
            background-size: 100% 100%!important;
  }
  .case_aa .top .btn .jt {
    right: 50%;
    margin-right: -40px;
  }
  .case_bb .case_ul li {
    width: 48.33335%;
  }
  .case_bb .case_ul li .text_box {
    padding: 10px;
  }
  .case_bb .case_ul li .text_box .title {
    margin-bottom: 3px;
  }
  .case_bb .case_ul li .text_box .te{
    height:50px;
  }
  .case_bb .case_ul li:nth-child(4n) {
    margin-right: 0%;
  }
  .case_bb .case_ul li:nth-child(3) {
    margin-top: 3.3333%;
  }
  .case_bb .case_ul li:nth-child(3n) {
    margin-right: 3.3333%;
  }
  .case_bb .case_ul li:nth-child(2n) {
    margin-right: 0;
  }
}
@media screen and (max-width: 640px) {
  .case_bb .case_ul li {
    width: 100%;
  }
  .case_bb .case_ul li:nth-child(2) {
    margin-top: 3.3333%;
  }
  .case_bb .case_ul li {
    margin-right: 0!important;
  }
}
.erj{position: fixed;width: 100%;height: 100%;right:-100%;top: 0;z-index: 1050;transition: all 0.3s;}
.erj .erj_le{width: 30%;z-index: 1051;background: rgba(0, 0, 0, 0.3);height: 100%;position: absolute;left: 0;top: 0;}
.erj_txt{width: 70%;height: 100%; background: #000;top: 0;right: 0px;padding:20px 3%;z-index: 1051;position: absolute;}
.erj_txt .txt1{line-height: 35px ;font-size: 16px;color: #fff;margin-bottom: 5px;}
.erj_txt .txt1 .txt_con{display: none;}
.erj_txt .txt1 a{display: block; font-size: 14px; color: #fff;line-height: 30px;}
.erj_txt .txt1 .txt_top{width: 80%;cursor: pointer;position: relative;}

.erj_txt .txt1 .txt_top::after{content: "";width: 35px;height: 35px;background: url(../images/erj.png) center no-repeat;position: absolute;right: 0;top: 0px;background-size: 15px ;}
.erj_txt .txt1 .txt_top.as::after{transform: rotate(90deg);}
.erj.act{right: 0;}