.c_nav_options>li:nth-child(3) {
    background-color: rgb(29, 108, 191);
}

.c_nav_options>li:nth-child(3) a {
    font-weight: 700;
}

.top_img {
    position: relative;
    width: 100%;
    height: 5.2rem;
}

.top_img img,
.top_img_1 img {
    width: 100%;
    height: 100%;
}


.top_img_1 {
    position: absolute;
    top: 1.35rem;
    left: 2.85rem;
    width: 6.32rem;
    height: 2.25rem;
}

.case_nav {
    float: left;
    position: relative;
    top: -0.48rem;
    left: 0;
    padding-left: 3rem;
    width: 10.2rem;
    height: 0.96rem;
    background-color: rgb(29, 108, 191);
    border-radius: 0px 80px 80px 0px;
    z-index: 2;
}

.case_nav_item {
    position: relative;
    float: left;
    margin: 0.26rem 0.04rem 0;
    padding-top: 0.28rem;
    width: 1.2rem;
    font-size: 0.18rem;
    text-align: center;
    line-height: 1;
    color: rgb(255, 255, 255) !important;
    cursor: pointer;
    display: block;
}

.case_nav_item span {
    display: none;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0.12rem;
    height: 0.12rem;
    background-color: rgb(255, 255, 255);
    border-radius: 50%;
}

.case_nav_item__active {
    font-weight: 700;
}

.case_list {
}

.case_nav_item__active span {
    display: block;
}

.case_list_1 {
    padding-top: 1.04rem;
}

.case_list_1 li {
    position: relative;
    float: left;
    overflow: hidden;
    margin: 0 0.16rem 0.24rem 0;
    width: 3.18rem;
    height: 3.2rem;
}

.case_list_1 li:nth-child(4n) {
    margin-right: 0;
}

.case_list_1 li img {
    width: 100%;
    height: 100%;
    transition: all .2s;
    object-fit: cover;
}
.case_list_1 li h2{
    background-color: rgba(0, 0, 0, 0.6);
    width: 100%;
    position: absolute;
    bottom: 0;
    left: 0;
    height: 0.4rem;
    line-height: .4rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #fff;
    font-size: 0.14rem;
    text-align: center;
    transition-duration: .3s;
    padding: 0 0.1rem;
}
.case_list_1 li:hover img {
    margin: -0.3rem 0 0 -0.3rem;
    width: 120%;
    height: 120%;
}
.case_list_1 li:hover h2{
    height: 0;
}
.case_list_1 li a {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    padding-top: 1.115rem;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    color: rgb(255, 255, 255);
    text-align: center;
    transition: all .1s;
}

.case_list_1 li:hover a {
    opacity: 1;
}

.case_list_1 li a h6 {
    font-size: 0.18rem;
}

.case_list_1 li a span {
    display: block;
    margin: 0.245rem auto 0.165rem;
    width: 0.32rem;
    height: 0.02rem;
    background-color: rgb(255, 255, 255);
}

.case_list_1 li a p {
    font-size: 0.14rem;
}