.banner {
    width: 100%;
}

.banner img {
    display: block;
    width: 100%;
    object-fit: cover;
    min-height: 21.875rem;

}

.about_list {
    background: #ffff;
    width: 100%;
    padding: .75rem 0 0;
    border-bottom: 1px solid #E5E5E5;
}

.about_list .center {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: auto;
}

.about_list .center a {
    display: block;
    white-space: nowrap;
    padding-bottom: .75rem;
    position: relative;
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: 1rem;
    color: #333333;
    line-height: 1.25rem;
    text-align: center;
    font-style: normal;
    text-transform: none;
    transition: all 0.2s ease-in-out;
    margin: 0 1.125rem;
}

.about_list .center a:hover {
    color: #0154A4;
}

.about_list .center a::after {
    content: '';
    display: block;
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0%;
    height: 1px;
    background: #0154A4;
    transition: all 0.3s ease-in-out;
}

.about_list .center a:hover::after {
    left: 0;
    width: 100%;
}

.about_list .center a.act {
    color: #0154A4;
}

.about_list .center a.act::after {
    left: 0;
    width: 100%;
}


.case{
    padding: 3.125rem 0;
}
.case ul{
    display: flex;
    flex-wrap: wrap;
}
.case ul li{
    width: 32.2222%;
    margin: 0 1.6666% 1.6666% 0;
}
.case ul li:nth-child(3n){
    margin: 0 0 1.6666%;
}
.case ul li div{
    aspect-ratio: 464/286;
    overflow: hidden;
}
.case ul li div img{
    width: 100%;
    object-fit: cover;
    transition: 0.5s;
}
.case ul li h3{
    font-size: 1.25rem;
    line-height: 1.625rem;
    font-weight: normal;
    padding: 1.875rem;
    border: 1px solid #E5E5E5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.case ul li:hover div img{
    transform: scale(1.1);
}
.case ul li:hover h3{
    color: #0154A4;
}


@media (max-width: 768px) {
    .banner img{
        min-height: 12.5rem;
    }

    .about_list .center{
        justify-content: flex-start;
    }

    .case{
        padding: 1.875rem 0;
    }
    .case ul li h3{
        height: 3.25rem;
        overflow: hidden;
        font-size: .875rem;
        line-height: 1.5;
        padding: .3125rem;
    }
}