.case-ban::before {
    position: absolute;
    content: '';
    width: 100%;
    height: 70px;
    bottom: 0;
    left: 0;
    mask: url(/static/images/banner_ceng.svg) center no-repeat;
    mask-size: 100% 70px;
    background-color: #ffffff;
    
}

.case_main {
    padding: 8rem 0;
}
.case_main_box_tit{
    text-align: center;
    margin-bottom: 30px;
}
.case_main_box_tit h2{
    font-size: 40px;
    font-weight: bold;
    color: #333333;
}
.case_main_box_tit h3{
    margin-top: 10px;
    font-size: 20px;
    color: #999999;
}
.case_main_box_con{
    padding: 50px 30px;
}
.box_list{
    display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  width: 100%;
}
.box_item{
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 10px;
}
.box_item_img{
    width: 358px;
    height: 115px;
    border: #ccc 1px solid;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 5px 5px 10px rgba(50, 50, 50, .3);
}
.box_item_img img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case_main_tit {
    padding: 0 100px;
}

.case_main_tit .tit-tab {
    background-color: #fafafa;
    padding: 5px;
    border-radius: 40px;
    box-shadow: 0 5px 10px 0 #dfdfdf;
}

.case_main_tit .tit-tab li {
    -webkit-box-flex: 0;
    max-width: 48%;
    position: relative;
    flex: 0 0 48%;
}

.case_main_tit .tit-tab li::after {
    content: "";
    width: 20px;
    height: 20px;
    position: absolute;
    left: 50%;
    bottom: -10px;
    transform: rotate(45deg) translate(-50%, 10px);
    opacity: 0;
    visibility: hidden;
    background: linear-gradient(295deg, #A3DDFF 18%, #D8ECF5 90%);
}

.case_main_tit .tit-tab li:hover::after,
.case_main_tit .tit-tab li.active::after {
    opacity: 1;
    visibility: visible;
}

.case_main_tit .tit-tab li h3 {
    position: relative;
    z-index: 10;
    padding: 15px 80px;
    font-size: 24px;
    color: #666666;
    text-align: center;
    cursor: pointer;
}

.case_main_tit .tit-tab li:hover h3,
.case_main_tit .tit-tab li.active h3 {
    color: #333333;
    background: linear-gradient(160deg, #A3DDFF 18%, #D8ECF5 90%);
    border-radius: 30px;
}

.case_main_con {
    padding: 30px 100px 0;
}

.case_main_con .wrap-s {
    animation: o-FadeUp-top 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.list {
    display: flex;
    justify-content: space-between;
    background: linear-gradient(#A3DDFF 0%, #D8ECF5 100%);
    margin: 50px 0;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 10px 15px 2px #c6c6c6;
}

.list-l {
    flex-basis: 50%;
    padding: 50px;

}

.list-l .list-l-tit h3 {
    color: #333;
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 10px;
}

.list-l .list-l-tit p {
    margin-bottom: 18px;
    font-size: 20px;
    line-height: 30px;
    text-align: justify;
    color: #666666;
    height: 60px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.list-l .list-l-con {
    max-height: 375px;
    overflow: hidden;
}

.list-l .list-l-con dt {
    font-size: 20px;
    font-weight: bold;
    color: #333333;
}

.list-l .list-l-con dd {
    font-size: 16px;
    color: #666666;
}