.footer {
    background: #e9eef9;
}

.header {
    background: linear-gradient(90deg, #def1fe, #f1f1f8);
}

.bodyer-main {
    padding: 30px 0 120px 0;
}

.aboutus-container {
    display: flex;
}

.aboutus-left {
    width: 187px;
    margin-right: 50px;
}

.aboutus-right {
    flex: 1;
}

.aboutus-nav {
    text-align: center;
    position: sticky;
    left: 0;
    top: 105px;
}

.aboutus-nav-item .nav-item-title {
    font-size: 24px;
    color: #666;
    background: #def1fe;
    line-height: 84px;
    cursor: pointer;
}

.aboutus-nav-item.on .nav-item-title {
    background: #689cd2;
    color: #fff;
}

.aboutus-nav-item .subnav-list {
    display: none;
    background: #689cd2;
    color: #fff;
}

.aboutus-nav-item.on .subnav-list {
    display: block;
}

.subnav-item {
    font-size: 16px;
    line-height: 35px;
    cursor: pointer;
}

.subnav-item.on {
    background: #306fb0;
}

.aboutus-content-item {
    margin-bottom: 60px;
}

.aboutus-title {
    padding-bottom: 16px;
    margin-bottom: 20px;
    color: #666;
    font-size: 30px;
    border-bottom: 1px solid #999999;
}

.aboutus-title span {
    font-size: 18px;
}

.aboutus-desc {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 50px;
    font-size: 16px;
    color: #666;
}

.aboutus-content p {
    margin-bottom: 10px;
    font-size: 18px;
    color: #666;
    line-height: 1.5;
    text-align: justify;
}

.aboutus-content img {
    width: 100%;
}

.news-list {
    display: flex;
    flex-wrap: wrap;
    margin-top: 40px;
}

.news-item {
    width: 48%;
    margin-left: 4%;
    margin-bottom: 30px;
    padding-left: 12px;
    color: #1680ed;
    font-size: 16px;
    box-sizing: border-box;
    cursor: pointer;
    position: relative;
}
.news-item:nth-child(2n+1){
    margin-left: 0;
}

.news-item::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #999;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
}
.news-title{
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.video-list {
    margin-top: 40px;
}

.video-item {
    display: inline-block;
    width: 31%;
    margin-left: 3%;
    margin-bottom: 30px;
    color: #1680ed;
    font-size: 16px;
    cursor: pointer;
}

.video-item:nth-child(3n+1) {
    margin-left: 0;
}

.video-cover {
    width: 100%;
    margin-bottom: 20px;
}

.video-cover .video-pic {
    width: 100%;
    height: 168px;
    object-fit: cover;
}

.video-title {
    color: #333;
    font-size: 16px;
    text-align: center;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.qanda-list {
    display: flex;
    flex-wrap: wrap;
    margin-top: 40px;
}

.qanda-item {
    width: 45%;
    margin-left: 10%;
    margin-bottom: 60px;
    cursor: pointer;
}
.qanda-item:nth-child(2n+1){
    margin-left: 0%;
}

.qanda-title {
    padding-left: 12px;
    margin-bottom: 20px;
    color: #689cd2;
    font-size: 18px;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    position: relative;
}

.qanda-title::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #689cd2;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
}

.qanda-anwser {
    color: #666;
    font-size: 16px;
    line-height: 1.5;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.service{
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #666;
    font-size: 18px;
}
.service-item{
    display: flex;
    align-items: center;
}
.service-pic{
    margin-right: 50px;
}
.service-pic div{
    margin-top: 20px;
    text-align: center;
}
.service-info div{
    margin-bottom: 20px;
}
.service-info img{
    width: 120px;
}
.service-phone{
    margin-top: 60px;
    color: #666;
    font-size: 18px;
}
.service-phone .phone{
    margin-top: 20px;
    font-size: 30px;
}