.principle_title{
    text-align: center;
}
.principle_title img{
    width: 20%;
    margin: 40px auto;
}
.principle_contrainer{
    max-width: 1500px;
    width: 95%;
    margin: 0 auto;
    overflow: hidden;
}
.principle_contrainer ul.left{
   width: 37%;
   float: left;
}
.principle_contrainer ul.left li{
    overflow: hidden;
    line-height: 28px;
    padding: 20px 0;
}
.principle_contrainer ul.left img{
    float: left;
    width: 40px;
    margin-top: 20px;
    margin-right: 30px;
}
.principle_contrainer ul.left .title{
    color: #04589f;
}
.principle_contrainer ul li .title{
    font-size: 16px;
}
.principle_contrainer ul li .text{
    font-size: 13px;
}
.principle_contrainer .middle{
    float: left;
    margin-top: 100px;
    width: 26%;
    text-align: center;
}
.principle_contrainer .middle img{
    width: 60%;
    margin: 0 auto;
}
.principle_contrainer ul.right{
    width: 37%;
    float: right;
 }
 .principle_contrainer ul.right li{
     overflow: hidden;
     line-height: 28px;
     padding: 20px 0;
 }
 .principle_contrainer ul.right img{
     float: left;
     width: 40px;
     margin-top: 20px;
     margin-right: 30px;
 }
 .principle_contrainer ul.right .title{
     color: #6e6f70;
 }
 .case {
    max-width: 1500px;
    width: 95%;
    margin: 40px auto 0;
    line-height: 1;
}
.case .case-lists {
    margin-top: 55px;
    display: flex;
    flex-wrap: wrap;
}

.case .case-lists li {
    width: 33.3333333333%;
}
.case .case-lists li a {
    display: block;
    margin: 12px 15px;
}
.case .case-lists .pic {
    position: relative;
}
.case .case-lists li .pic .pic-content {
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.case .case-lists .pic img {
    width: 100%;
    display: block;
    transition: all 0.8s;
}
.case .case-lists .pic .all-fix {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: all 1s;
}
.case .case-lists .pic .all-fix .all-fix-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 16px;
}
.case .case-lists .pic .all-fix .before {
    top: 1px;
}
.case .case-lists .pic .all-fix .after, .case .case-lists .pic .all-fix .before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    height: 1px;
    width: 0;
    background-color: #fff;
    transition: all 1s;
    opacity: 0;
    width: 100%;
}
.case .case-lists .pic .all-fix p {
    position: relative;
    padding: 6px 0;
}
.case .case-lists .pic .all-fix .after {
    bottom: -1px;
}
.case .case-lists .pic .all-fix .after, .case .case-lists .pic .all-fix .before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    height: 1px;
    width: 0;
    background-color: #fff;
    transition: all 1s;
    opacity: 0;
    width: 100%;
}
.case .case-lists .li-bottom {
    box-shadow: 0px 0px 57px 0px rgb(52 52 52 / 9%);
    padding: 0px 32px 0 24px;
    box-sizing: border-box;
}
.case .case-lists .li-bottom .left {
    width: 82%;
    display: inline-block;
    border-right: 1px solid #e5e5e5;
}
.case .case-lists .li-bottom .text {
    padding-top: 1px;
    color: #343434;
    font-size: 16px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: bold;
}
.case .case-lists .li-bottom .description {
    font-size: 14px;
    color: #666;
    margin-top: 9px;
    padding-bottom: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.case .case-lists .li-bottom .right {
    float: right;
}
.case .case-lists .li-bottom .icon.iconfont {
    display: inline-block;
    margin-top: 22px;
    height: auto;
    font-size: 26px;
    color: #dddddc;
}
.case .case-lists li .icon {
    position: relative;
    width: 100%;
    height: 286px;
    overflow: hidden;
}
.title_en {
    font-size: 14px;
    color: #b5bec7;
    text-align: center;
}
.seo-title {
    font-size: 30px;
    color: #3680c7;
    font-weight: bold;
    text-align: center;
}
@media (max-width: 720px){
    .principle_title img {
        width: 10rem;
        margin: 1rem auto;
    }
    .principle_contrainer ul.left img{
        width: 2rem;
        margin-top: 0;
        margin-right: 1rem;
    }
    .principle_contrainer ul.right img{
        width: 2rem;
        margin-top: 0;
        margin-right: 1rem;
    }
    .principle_contrainer ul li .title{
        font-size: 0.4rem;
    }
    .principle_contrainer ul li .text{
        font-size: 12px;
    }
    .principle_contrainer ul.left li{
        line-height: 1.2rem;
    }
    .principle_contrainer .middle{
        display: none;
    }
    .principle_contrainer ul.left{
        width: 100%;
    }
    .principle_contrainer ul.right{
        width: 100%;
    }
    .case {
        width: 100%;
        padding: 0 15px;
        box-sizing: border-box;
        margin-top: 30px;
    }
    .case .case-lists {
        margin-top: 30px;
    }
    .case .case-lists li {
        margin-right: 0 !important;
        width: 100%;
        margin-bottom: 15px;
    }
    .case .case-lists .pic {
        position: relative;
        width: 100%;
        height: auto;
    }
}