.sec5_bottom .fr{
        width: 100%;
        float: right;
        margin-bottom: 0.3rem;
}
.sec5_bottom  li {
    width: 23.76%;
    float: left;
    height: 10.6vw;
    margin-bottom: 0.8vw;
}
.sec5_bottom li:nth-child(1) {
    width: 48.3%;
    height: 22vw;
    margin-right: 0.5%;
}
.sec5_bottom li:nth-child(2), .sec5_bottom li:nth-child(4) {
    margin: 0 1.2%;
}

.sec5_bottom li a {
    border-radius: 0.09rem;
    display: block;
    position: relative;
    overflow: hidden;
    height: 100%;
    width: 100%;
}
.sec5_bottom li img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    -ms-transform: translate(-50%,-50%);
    -webkit-transform: translate(-50%,-50%);
    transition: .3s all ease;
    -ms-transition: .3s all ease;
    -webkit-transition: .3s all ease;
}
.sec5_bottom  li a:hover h4 {
    opacity: 1;
}
.sec5_bottom li:nth-child(1) h4 {
    line-height: 22vw;
}
.sec5_bottom li h4 {
    color: #fff;
    font-size: 0.16rem;
    display: block;
    width: 100%;
    height: 100%;
    line-height: 10.4vw;
    background: rgba(0,55,110,0.5);
    z-index: 3;
    position: absolute;
    left: 0;
    top: 0;
    text-align: center;
    opacity: 0;
    transition: .3s all ease;
    -ms-transition: .3s all ease;
    -webkit-transition: .3s all ease;
}
.PhotoList_i1 span {
    display: none;
}
.clearfix:after {
    content: "";
    display: block;
    clear: both;
}
.sec5_bottom li img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    -ms-transform: translate(-50%,-50%);
    -webkit-transform: translate(-50%,-50%);
    transition: .3s all ease;
    -ms-transition: .3s all ease;
    -webkit-transition: .3s all ease;
}
.sec5_bottom li a:hover img {
    transform: scale(1.1) translate(-45%,-45%);
    -ms-transform: scale(1.1) translate(-45%,-45%);
    -webkit-transform: scale(1.1) translate(-45%,-45%);
}