.cases_nav{
  position: fixed;
  top: calc((100% + 0.9rem) /2);
  transform: translateY(-50%);
  left: -3.9rem;
  width: 3.9rem;
  height: auto;
  background: #FFFFFF;
  box-shadow: 0rem 0rem 0.1rem 0.01rem rgba(0,0,0,0.16);
  border-radius: 0.1rem 0.1rem 0.1rem 0.1rem;
  z-index: 3;
  padding: 0.45rem 0.3rem 0.38rem 0;

  transition: all 0.5s;
}
.cases_nav.show{
  left: 0;
}
.cases_nav .cases_class{
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    padding-left: 0.48rem;
}
.cases_nav .cases_class::-webkit-scrollbar {
	width: 4px;    
	/*height: 4px;*/
}
.cases_nav .cases_class::-webkit-scrollbar-thumb {
	border-radius: 10px;
	-webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
	background: rgba(0,0,0,0.2);
}
.cases_nav .cases_class::-webkit-scrollbar-track {
	-webkit-box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
	border-radius: 0;
	background: rgba(0,0,0,0.1);
}
.cases_nav .class_nav{
  margin-bottom: 0.4rem;
}
.cases_nav .class_nav:last-child{
  margin-bottom: 0;
}
.cases_nav .class_nav h3{
  font-family: Open Sans, Open Sans;
  font-weight: bold;
  font-size: 0.24rem;
  color: #393939;
}
.cases_nav .class_nav a{
  margin-top: 0.16rem;
  font-family: Open Sans, Open Sans;
  font-weight: 400;
  font-size: 0.2rem;
  color: #393939;
  position: relative;
}
.cases_nav .class_nav a::before{
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: -0.46rem;
  width: 0.04rem;
  height: 0.22rem;
  background: #CE0010;
  display: none;
}
.cases_nav .class_nav a.active,
.cases_nav .class_nav a:hover{
  font-weight: bold;
  color: #CE0010;
}
.cases_nav .class_nav a.active::before,
.cases_nav .class_nav a:hover::before{
  display: block;
}
.cases_nav .cases_btn{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  right: -0.47rem;
  width: 0.47rem;
  height: 1.8rem;
  background: #CE0010;
  border-radius: 0rem 0.15rem 0.15rem 0rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.cases_nav .cases_btn i{
  display: block;
  width: 0.18rem;
  height: 0.17rem;
  background: url(../images/foldup.png) center center no-repeat;
  background-size: contain;
  transform: rotate(180deg);
}
.cases_nav.show .cases_btn i{
  transform: rotate(0deg);
}




.cases_view {
  padding: 1.8rem 0 0.95rem;
  background: #FFFFFF;
  overflow: hidden;
  position: relative;
}
.cases_view .main{
  position: relative;
}
.cases_view .cases_title {
  font-family: Poppins, Poppins;
  font-weight: 500;
  font-size: 0.5rem;
  color: #393939;
  text-align: center;
  position: relative;
  text-transform: uppercase;
  margin-bottom: 0.66rem;
}
.cases_view .cases_title::after {
  content: '';
  position: absolute;
  bottom: -0.2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 0.72rem;
  height: 0.05rem;
  background: #CE0010;
}
.cases_view .cases_litpic {
  width: 100%;
  position: relative;
  margin-bottom: 0.86rem;
}
.cases_view .cases_litpic .litpic_pic {
  width: 100%;
  height: 7.34rem;
  position: relative;
}
.cases_view .cases_litpic .litpic_pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.cases_view .cases_litpic .litpic_txt {
  width: 100%;
  height: auto;
  background: #F5F5F5;
  padding: 0.28rem 0.43rem 0.7rem 0.49rem;
}
.cases_view .cases_litpic .litpic_txt .litpic_title {
  display: flex;
  align-items: center;
  column-gap: 0.6rem;
}
.cases_view .cases_litpic .litpic_txt .litpic_title h4 {
  font-family: Open Sans, Open Sans;
  font-weight: bold;
  font-size: 0.24rem;
  color: #393939;
}
.cases_view .cases_litpic .litpic_txt .litpic_title div {
  display: flex;
  align-items: center;
  column-gap: 0.17rem;
}
.cases_view .cases_litpic .litpic_txt .litpic_title div img {
  width: 0.21rem;
  height: 0.21rem;
  filter: brightness(0);
}
.cases_view .cases_litpic .litpic_txt .litpic_title div span {
  font-family: Open Sans, Open Sans;
  font-weight: 400;
  font-size: 0.16rem;
  color: #393939;
  white-space: nowrap;
}
.cases_view .cases_litpic .litpic_txt .litpic_info {
  margin-top: 0.26rem;
  font-family: Open Sans, Open Sans;
  font-weight: 400;
  font-size: 0.16rem;
  color: #393939;
  line-height: 1.875;
}




.cases_view .cases_img {
  width: fit-content;
  max-width: 8.6rem;
  /* max-height: 4.6rem; */
  margin: 0 auto;
  position: relative;
}
.cases_view .cases_img img{
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.cases_view .cases_img a {
  position: absolute;
  width: 0.23rem;
  height: 0.23rem;
  background: #CE0010;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Open Sans, Open Sans;
  font-weight: bold;
  font-size: 0.14rem;
  color: #FFFFFF;
}










.cases_ul {
  width: 100%;
  overflow: hidden;
}
.cases_ul .cases_li {
  padding: 0.64rem 0;
  width: 100%;
  position: relative;
  margin-top: 0.7rem;
  display: flex;
  justify-content: space-between;
}
.cases_ul .cases_li .cases_img {
  width: 7.44rem;
  height: 5.3rem;
  overflow: hidden;
}
.cases_ul .cases_li .cases_img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.3s ease-in-out;
}
.cases_ul .cases_li .cases_img:hover img {
  transform: scale(1.1);
}
.cases_ul .cases_li .cases_txt {
  width: 6.88rem;
  padding-top: 0.32rem;
}
.cases_ul .cases_li .cases_txt .cases_num {
  font-family: Poppins-Bold;
  font-weight: bold;
  font-size: 0.5rem;
  color: #CE0010;
}
.cases_ul .cases_li .cases_txt .cases_title {
  font-family: OpenSans-Bold;
  font-weight: bold;
  font-size: 0.36rem;
  color: #393939;
}
.cases_ul .cases_li .cases_txt .cases_title:hover {
  color: #CE0010;
}
.cases_ul .cases_li .cases_txt .cases_info {
  margin-top: 0.35rem;
  font-family: OpenSans-Regular;
  font-weight: 400;
  font-size: 0.18rem;
  color: #393939;
  line-height: 1.666;
}
.cases_ul .cases_li:first-child {
  margin-top: 0;
}
.cases_ul .cases_li:after {
  content: '';
  position: absolute;
  top: 0;
  left: 1.6rem;
  width: 100%;
  height: 100%;
  background: #F8F8F8;
  z-index: -1;
}
.cases_ul .cases_li:nth-child(2n) {
  flex-direction: row-reverse;
}
.cases_ul .cases_li:nth-child(2n):after {
  left: -1.6rem;
}
.products {
  margin: 1.06rem 0 1.38rem;
}
.products h2 {
  text-align: center;
  text-transform: uppercase;
  font-family: Poppins-Medium;
  font-weight: 500;
  font-size: 0.5rem;
  color: #393939;
}
.products .products_list {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  column-gap: 0.3rem;
  row-gap: 0.3rem;
}
.products .products_list .products_item {
  width: calc((100% - 0.9rem) / 4);
  background: #FFFFFF;
  box-shadow: 0rem 0rem 0.1rem 0.01rem rgba(0, 0, 0, 0.1);
  border-radius: 0.1rem;
  padding: 0.22rem;
}
.products .products_list .products_item .products_img {
  width: 100%;
  height: 0;
  padding-bottom: 100%;
  overflow: hidden;
  position: relative;
}
.products .products_list .products_item .products_img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s ease-in-out;
}
.products .products_list .products_item .products_img:hover img {
  transform: translate(-50%, -50%) scale(1.1);
}
.products .products_list .products_item .products_title {
  display: flex;
  align-items: center;
  height: 0.5rem;
  justify-content: center;
  column-gap: 0.3rem;
  margin-top: 0.2rem;
  text-align: center;
  font-family: OpenSans-Medium;
  font-weight: 500;
  font-size: 0.2rem;
  color: #393939;
}
.products .products_list .products_item .products_title i {
  flex: 0 0 0.16rem;
  height: 0.16rem;
  background: url('../images/jiantou.png') no-repeat center center;
  background-size: contain;
  filter: brightness(0);
}
.products .products_list .products_item .products_title:hover {
  color: #CE0010;
}
.products .products_list .products_item .products_title:hover i {
  filter: brightness(1) invert(0);
}









@media screen and (max-width: 1042px), screen and (max-device-width: 1042px) {
  .cases_nav {
    width: 260px;
    left: -260px;
    padding: 20px;
  }
  .cases_nav .cases_class{
    max-height: 80vh;
    overflow-y: auto;
  }
  .cases_nav .class_nav{
    margin-bottom: 30px;
  }
  .cases_nav .class_nav h3 {
    font-size: 18px;
  }
  .cases_nav .class_nav a {
    font-size: 16px;
    margin-top: 8px;
  }
  .cases_nav .cases_btn{width: auto;right: auto;left: 100%;height: 120px;padding: 8px;}
  .cases_nav .cases_btn i{
    width: 12px;
    height: 12px;
  }




  .cases_view {
    padding: 170px 0 80px;
  }
  .cases_view .cases_title {
    font-size: 36px;
    margin-bottom: 50px;
  }
  .cases_view .cases_title::after{
      width: 60px;
      height: 3px;
      bottom: -10px;
  }
  .cases_view .cases_litpic{
    margin-bottom: 50px;
  }
  .cases_view .cases_litpic .litpic_pic {
    height: auto;
    aspect-ratio: 16 / 9;
  }
  .cases_view .cases_litpic .litpic_txt {
    padding: 20px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title{
    column-gap: 30px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title h4{
    font-size: 20px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title div{
    column-gap: 8px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title div img{
    width: 16px;
    height: 16px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title div span{
    font-size: 16px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_info{
    font-size: 14px;
    margin-top: 6px;
  }





  .cases_ul .cases_li,
  .cases_ul .cases_li:nth-child(2n) {
    display: block;
    padding: 20px;
    margin-top: 30px;
    background: #F8F8F8;
  }
  .cases_ul .cases_li:after {
    display: none;
  }
  .cases_ul .cases_li .cases_img,
  .cases_ul .cases_li .cases_txt {
    width: 100%;
  }
  .cases_ul .cases_li .cases_img {
    height: auto;
    aspect-ratio: 16 / 10;
  }
  .cases_ul .cases_li .cases_txt {
    padding-top: 20px;
  }
  .cases_ul .cases_li .cases_txt .cases_num {
    font-size: 24px;
  }
  .cases_ul .cases_li .cases_txt .cases_title{
    text-align: left;
    margin-bottom: 0;
    font-size: 20px;
  }
  .cases_ul .cases_li .cases_txt .cases_info{
    font-size: 14px;
    margin-top: 6px;
  }


  .products {
    margin: 80px 0;
  }
  .products h2{
    font-size: 36px;
  }
  .products .products_list{
    margin-top: 40px;
    gap: 16px;
  }
  .products .products_list .products_item {
    width: calc(50% - 8px);
  }
}

@media screen and (max-width: 768px), screen and (max-device-width: 768px) {
  .cases_nav {
      width: 180px;
      left: -180px;
  }
  .cases_nav .class_nav {
    margin-bottom: 20px;
  }
  .cases_nav .class_nav h3{
    font-size: 14px;
  }
  .cases_nav .class_nav a{
    font-size: 12px;
  }
  .cases_nav .cases_btn i{
    width: 10px;
    height: 10px;
  }





  .cases_view {
      padding: 100px 0 50px;
  }
  .cases_view .cases_title,
  .products h2 {
    font-size: 22px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title {
    display: block;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title h4{
    font-size: 18px;
  }
  .cases_view .cases_litpic .litpic_txt .litpic_title div {
      margin-top: 4px;
      margin-bottom: 10px;
  }
  .products .products_list .products_item .products_title{
    font-size: 14px;
    height: auto;
  }
}