.case_detail_box {
  width: 100%;
  min-width: 1200px;
  overflow: hidden;
}

.case {
  width: 1200px;
  margin: 0 auto;
  margin-top: 40px;
  overflow: hidden;
  margin-bottom: 100px;
}

.case_l {
  float: left;
}

.case_l_top {
  width: 240px;
  height: 310px;
  background: url('../image/case-detail-l.jpg') no-repeat;
  background-size: cover;
  position: relative;
  margin-top: 21px;
}

.case_l_text {
  text-align: center;
  font-size: 20px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #FFFFFF;
  line-height: 40px;
}

.case_detail {
  width: 130px;
  height: 40px;
  background: linear-gradient(0deg, #00467F, #003967);
  border-radius: 19px;
  margin: 0 auto;
  margin-top: 100px;
  text-align: center;
  line-height: 40px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #FFFFFF;
}

.case_l_back {
  width: 240px;
  height: 310px;
  background: rgba(0, 70, 127, 0.6);
  position: absolute;
  top: 0;
  padding-top: 20px;
}

.case_l_bottom {
  width: 240px;
  height: 96px;
  background: #00467F;
  margin-top: 20px;
  padding-top: 25px;
}

.case_l_bottom span {
  display: block;
}

.case_l_bottom span:first-child {
  width: 193px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #FFFFFF;
  margin: 0 auto;
}

.tel_btn img {
  width: 20px;
  height: 20px;
  display: inline-block;
  float: left;
}

.tel {
  float: left;
  padding-left: 12px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  color: #FFFFFF;
}

.tel_btn {
  width: 160px;
  overflow: hidden;
  margin: 0 auto;
  margin-top: 15px;
}

.case_nav {}

.case_nav_title {
  width: 240px;
  height: 103px;
  background: #00467F;
  box-shadow: 0px 1px 5px 0px rgba(0, 0, 0, 0.12);
  font-size: 22px;
  font-family: PingFang;
  font-weight: 500;
  color: #FFFFFF;
  padding: 23px 0px 0px 25px;
  position: relative;
}

.case_nav_title span {
  display: block;
}

.case_nav_title span:first-child::after {
  content: '';
  width: 40px;
  height: 2px;
  background: #FFFFFF;
  display: block;
  margin-top: 7px;
}

.case_nav_back {
  width: 240px;
  font-size: 40px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  color: #FEFEFE;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate(0, -50%);
  margin-left: -3px;
  opacity: 0.03;
}

.case_nav_container {
  width: 240px;
  background: #FFFFFF;
  box-shadow: 0px 1px 5px 0px rgba(0, 0, 0, 0.12);
}

.casenav {
  line-height: 50px;
  padding-left: 30px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #333333;
  cursor: pointer;
}

.casenav a{
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #333333;
}

.case_nav_main li::before {
  content: '';
  width: 4px;
  height: 4px;
  background: #69DCE0;
  border-radius: 50%;
  display: inline-block;
  margin-right: 15px;
  line-height: 50px;
  margin-bottom: 4px;
}

.case_nav_main li:hover {
  background: #00467F;
  color: #FEFEFE;
}
/* 选择样式 */
.case_nav_active{
  background: #00467F;
}
.case_nav_active a{
  color: #fff;
}



.case_nav_main li:hover  a{
  color: #FEFEFE;
}

.case_down {
  width: 240px;
  height: 0;
  overflow: hidden;
  margin-left: -30px;
}

.case_down li {
  width: 240px;
  height: 40px;
  background: #F8F8F8;
  font-size: 14px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #666666;
  line-height: 40px;
  padding-left: 39px;
}

.case_down li::before {
  content: "";
  width: 0;
  height: 0;
}

.case_r {
  width: 930px;
  float: right;
}

.product_main{
  width: 450px;
  height: 450px;
  background: #F8F8F8;
border: 1px solid #DDDDDD;
  padding-top: 72px;
  float: left;
  margin-right: 29px;
  margin-bottom: 29px;
}

.product_main:nth-child(2n){
  margin-right: 0;
}

.product_main:hover{

  box-shadow: 0px 8px 9px 0px rgba(0, 0, 0, 0.12);
}

.product_img{
  width: 336px;
height: 198px;
margin: 0 auto;
}

.product_img img{
  width: 100%;
height: 100%;
display: block;
}

.product_text{
  font-size: 20px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  color: #333333;
  text-align: center;
  margin-top: 37px;
  }

  .product_detail{
    width: 160px;
height: 40px;
background: #F8F8F8;
border: 1px solid #00467F;
font-size: 16px;
font-family: Microsoft YaHei;
font-weight: 400;
color: #00467F;
line-height: 40px;
text-align: center;
margin: 0 auto;
margin-top: 22px;

  }

  .product_detail:hover{
    width: 160px;
    height: 40px;
    background: linear-gradient(0deg, #00467F, #003967);
    border-radius: 20px;
    color: #fff;
  }



.banner_kuang_box{
  left: 58.22%;
}