.about {
    background-color: RGBA(250, 250, 250, 1);

}

.aboutTitle .zh {
    font-family: Microsoft YaHei;
    font-weight: 300;
    color: #222222;
    line-height: 1;
}

.aboutTitle .en {
    font-family: Rany-Bold;
    color: #222222;
    line-height: 1;
    margin-top: 1em;
    text-transform: uppercase;
}

.about .box1 {
    position: relative;
    padding-top: 100px;
    z-index: 2;
}

.about .box1 .box-c {
    width: 66.66%;
    margin: 0 0 0 auto;
}

.about .box1 .box-c .text-title {
    font-weight: bold;
    color: #222222;
    line-height: 1;
}

.about .box1 .box-c .text-box {
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
    margin-top: 39px;
}

.about .box1 .box-b {
    margin-top: 83px;
}

.about .box1 .box-b .video {
    position: relative;
}

.about .box1 .box-b video {
    display: block;
    width: 100%;
    border-radius: 20px;
}

.about .box1 .box-b .videoBox {
    position: absolute;
    width: 100%;
    top: 50%;
    transform: translateY(-50%);
    text-align: center;
    z-index: 3;
}

.about .box1 .box-b .videoBox .text-title {
    font-weight: bold;
    /* font-size: 48px; */
    color: #FFFFFF;
    line-height: 1.2;
    margin-bottom: .75em;
}

.about .box1 .box-b .videoBox .playerBtn {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    opacity: 0.7;
    margin: 0 auto;
    cursor: pointer;
}

.about .box1 .box-b .videoBox .playerBtn img {
    display: block;
    width: 100%;
}

.about .box2 {
    position: relative;
    min-height: 100vh;
}

.about .box2 .box-c {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 100px 0 172px;
}

.about .box2 .box-c .l {
    position: sticky;
    top: 140px;
}

.about .box2 .box-c .r {
    width: 66.66%;
}

.about .box2 .box-c .r .list li {
    display: flex;
}

.about .box2 .box-c .r .list li:not(:last-child) {
    margin-bottom: 29px;
}

.about .box2 .box-c .r .list li:nth-child(even) {
    justify-content: flex-end;
}

.about .box2 .box-c .r .list li .text-box {
    position: relative;
    width: 50%;
    padding: 0 30px;
    color: #222222;
    transition: all .6s;
}

.about .box2 .box-c .r .list li:hover .text-box {
    color: rgba(31, 100, 176, 1);
}

.about .box2 .box-c .r .list li .text-box::before {
    position: absolute;
    content: "";
    left: 0;
    top: 0;
    width: 3px;
    height: 40px;
    background: #222222;
    transition: all .6s;
}

.about .box2 .box-c .r .list li:hover .text-box::before {
    background: rgba(31, 100, 176, 1);
}

.about .box2 .box-c .r .list li .year {
    font-family: Rany-Bold;
    line-height: 1;
}

.about .box2 .box-c .r .list li .text {
    font-family: Microsoft YaHei;
    font-weight: 300;
    font-size: 24px;
    line-height: 2;
    margin-top: 25px;
}

.about .box3 {
    position: relative;
    background-color: #fff;
    padding: 140px 0;
}

.about .box3 .container {
    position: relative;
    z-index: 3;
}

.about .box3 .box-t {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.about .box3 .btns {
    display: flex;
}

.about .box3 .btns .btn {
    position: relative;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #FFFFFF;
    border-radius: 50%;
    color: rgba(31, 100, 176, 1);
    cursor: pointer;
    transition: all .6s;
}

.about .box3 .btns .btn .iconfont {
    font-size: 18px;
    font-weight: bold;
}

.about .box3 .btns .btn:last-child {
    margin-left: -10px;
    background-color: rgba(31, 100, 176, 1);
    color: #fff;
}

.about .box3 .btns .btn:hover {
    background-color: rgba(31, 100, 176, 1);
    color: #fff;
    z-index: 3;
}

.about .box3 .btns .btn:hover+.btn {
    background: #fff;
    color: rgba(31, 100, 176, 1);
}

.about .box3 .box-c {
    margin-top: 66px;
}

.about .box3 .box-c .swiper {
    overflow: visible;
}

.about .box3 .box-c .swiper-slide {
    width: 66.66%;
    display: flex;
    align-items: flex-start;
}

.about .box3 .box-c .swiper-slide .pic {
    width: 42.87%;
    border-radius: 10px;
}

.about .box3 .box-c .swiper-slide .text-box {
    flex: 1;
    margin: 0 7.13%;
}

.about .box3 .box-c .swiper-slide .text-title {
    font-size: 18px;
    color: #999999;
    line-height: 1;
}

.about .box3 .box-c .swiper-slide .text-title span {
    font-family: Microsoft YaHei;
    font-weight: 300;
    color: rgba(34, 34, 34, 1);
    padding-right: .73em;
}

.about .box3 .box-c .swiper-slide .text {
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
    margin-top: 50px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
    text-overflow: ellipsis;
}

.about .box3 .box-c .swiper-slide .more {
    margin-top: 79px;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 80px;
    height: 80px;
    background: #ECECEC;
    border-radius: 50%;
    border: 1px solid #DEDEDE;
    color: rgba(31, 100, 176, 1);
    transition: all .6s;
}

.about .box3 .box-c .swiper-slide .more .iconfont {
    font-size: 22px;
}

.about .box3 .box-c .swiper-slide .more:hover {
    background: rgba(31, 100, 176, 1);
    border-color: rgba(31, 100, 176, 1);
    color: #fff;
}

.about .box4 {
    background-color: #FAFAFA;
    padding: 140px 0;
}

.about .box4 .content1400 {
    position: relative;
}

.about .box4 .box-t {
    margin-top: 70px;
}

.about .box4 .box-t .pic {
    border-radius: 10px;
}

.about .box4 .box-c {
    margin-top: 56px;
}

.about .box4 .box-c .list li {
    padding: 40px 50px;
    background: #F4F4F4;
    border-radius: 5px;
    display: flex;
    color: #222;
    transition: all .6s;
    cursor: pointer;
}

.about .box4 .box-c .list li:hover {
    color: #fff;
    background: #1F64B0;
}

.about .box4 .box-c .list li:not(:last-child) {
    margin-bottom: 10px;
}

.about .box4 .box-c .list li .icon {
    width: 80px;
    height: 80px;
    background: #FAFAFA;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1F64B0;
}

.about .box4 .box-c .list li .icon .iconfont {
    font-size: 26px;
}

.about .box4 .box-c .list li .text-des,
.about .box4 .box-c .list li .text-title {
    padding-top: 16px;
}

.about .box4 .box-c .list li .text-des {
    font-weight: 300;
}

.about .box4 .box-c .list li .text-title {
    margin: 0 250px;
    width: 200px;
    font-weight: bold;
}

.introduction-details {
    padding: 100px 0 153px;
    background: #FAFAFA;
}

.introduction-details .box1 {
    position: relative;
    z-index: 3;
}

.introduction-details .box1 .box-c,
.introduction-details .box1 .box-t {
    display: flex;
    justify-content: space-between;
}

.introduction-details .box1 .box-c-l,
.introduction-details .box1 .box-t-l {
    width: 66.66%;
}

.introduction-details .box1 .box-c-r,
.introduction-details .box1 .box-t-r {
    width: 33.33%;
}

.introduction-details .box1 .box-t-l {
    display: flex;
}

.introduction-details .box1 .box-t-l .pic {
    width: 50%;
}

.introduction-details .box1 .box-t-l .pic img {
    display: block;
    width: 100%;
    border-radius: 10px;
}

.introduction-details .box1 .box-t-l .text-box {
    padding: 66px;
    width: 50%;
}

.introduction-details .box1 .box-t-l .text-title {
    color: #222222;
    font-weight: 300;
}

.introduction-details .box1 .box-t-l .text-des {
    font-weight: 400;
    font-size: 24px;
    color: #222222;
    line-height: 30px;
    margin-top: 5px;
}

.introduction-details .box1 .box-t-r {
    font-weight: bold;
    font-size: 18px;
    color: #222222;
    line-height: 30px;
    padding-top: 60px;
}

.introduction-details .box1 .box-t-r p:not(:last-child) {
    margin-bottom: 30px;
}
.introduction-details .box1 .box-c{
    margin-top: 90px;
}
.introduction-details .box1 .box-c-l{
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
    padding-right: 50px;
}
.introduction-details .box1 .box-c-r img{
    width: 100%;
    display: block;
    border-radius: 10px;
}
.introduction-details .box1 .box-c-r img:not(:last-child){
    margin-bottom: 20px;
}
@media (max-width: 1440px) {
    .about .box2 .box-c .r .list li .text {
        font-size: 20px;
    }
    .about .box4 .box-c .list li .text-title{
        margin: 0 180px;
    }
}

@media (max-width: 1199px) {
    .introduction-details .box1 .box-t-l .text-box{
        padding: 30px;
    }
    .introduction-details .box1 .box-t-l .text-des{
        font-size: 20px;
    }
    .introduction-details .box1 .box-t-r{
        padding-top: 30px;
    }
    .introduction-details .box1 .box-t-r p:not(:last-child){
        margin-bottom: 20px;
    }
    .about .box4 .box-c .list li .text-des, .about .box4 .box-c .list li .text-title{
        padding-top: 11px;
    }
    .about .box4 .box-c .list li .icon{
        width: 60px;
        height: 60px;
    }
    .about .box4 .box-c .list li .text-title{
        margin: 0 100px;
    }
    .about .box4 .box-c .list li{
        padding: 20px 40px;
    }
    .about .box4,
    .introduction-details{
        padding: 80px 0;
    }
    .introduction-details .box1 .box-c,
    .about .box4 .box-c,
    .about .box4 .box-t{
        margin-top: 45px;
    }
    .about .box1 {
        padding-top: 80px;
    }

    .about .box3,
    .about .box2 .box-c {
        padding: 80px 0;
    }

    .about .box3 .box-c,
    .about .box1 .box-b {
        margin-top: 45px;
    }

    .about .box3 .btns .btn {
        width: 48px;
        height: 48px;
    }

    .about .box3 .btns .btn .iconfont {
        font-size: 16px;
    }

    .aboutTitle .en {
        margin-top: .5em;
    }

    .about .box1 .box-c {
        width: 100%;
        margin-top: 40px;
    }

    .about .box1 .box-c .text-box {
        margin-top: 20px;
    }

    .about .box1 .box-b .videoBox .playerBtn {
        width: 80px;
        height: 80px;
    }

    .about .box2 {
        min-height: 0;
    }

    .about .box2 .box-c .l {
        position: relative;
        top: 0;
    }

    .about .box2 .box-c {
        flex-direction: column;
    }

    .about .box2 .box-c .r {
        width: 100%;
        margin-top: 40px;
    }

    .about .box2 .box-c .r .list li .text-box {
        padding: 0 20px;
    }

    .about .box2 .box-c .r .list li .text-box::before {
        height: 30px;
    }

    .about .box2 .box-c .r .list li .text {
        margin-top: 20px;
        font-size: 18px;
        line-height: 30px;
    }

    .about .box3 .box-c .swiper-slide .more {
        width: 60px;
        height: 60px;
        margin-top: 40px;
    }

    .about .box3 .box-c .swiper-slide .text {
        margin-top: 20px;
    }

}

@media (max-width: 1024px) {
    .introduction-details .box1 .box-t-r p:not(:last-child){
        margin-bottom: 5px;
    }
    .introduction-details .box1 .box-t-r{
        font-size: 16px;
    }
    .about .box4 .box-c .list li .text-des, .about .box4 .box-c .list li .text-title{
        padding-top: 4px;
    }
    .about .box4 .box-c .list li{
        padding: 20px;
    }
    .about .box4 .box-c .list li .icon{
        width: 40px;
        height: 40px;
    }
    .about .box4 .box-c .list li .text-title{
        margin: 0 40px;
    }
     .about .box4,
    .introduction-details{
        padding: 70px 0;
    }
    .introduction-details .box1 .box-c,
    .about .box4 .box-c,
    .about .box4 .box-t{
        margin-top: 40px;
    }
    .about .box3 .box-c .swiper {
        overflow: hidden;
    }

    .about .box3 .box-c .swiper-slide {
        width: 100%;
    }

    .about .box1 {
        padding-top: 70px;
    }

    .about .box3,
    .about .box2 .box-c {
        padding: 70px 0;
    }

    .about .box3 .box-c,
    .about .box1 .box-b {
        margin-top: 40px;
    }

    .about .box3 .box-c .swiper-slide .pic {
        width: 33%;
    }

    .about .box3 .box-c .swiper-slide .text-box {
        margin: 0;
        padding-left: 30px;
    }
    .introduction-details .box1 .box-c-l{
        padding-right: 30px;
    }
}

@media (max-width: 768px) {
    .introduction-details .box1 .box-c-r{
        margin-top: 30px;
    }
     .introduction-details .box1 .box-c, .introduction-details .box1 .box-t{
        flex-direction: column;
     }
     .introduction-details .box1 .box-c-l, .introduction-details .box1 .box-t-l{
        width: 100%;
     }
     .introduction-details .box1 .box-c-r, .introduction-details .box1 .box-t-r{
        width: 100%;
     }
    .about .box4 .box-c .list li{
        flex-wrap: wrap;
    }
    .about .box4 .box-c .list li .text-des{
        flex: none;
        width: 100%;
        padding-left: 60px;
    }
    .about .box4 .box-c .list li .text-title{
        margin: 0 20px;
        width: 130px;
    }
    .about .box4,
    .introduction-details{
        padding: 60px 0;
    }
    .introduction-details .box1 .box-c,
    .about .box4 .box-c,
    .about .box4 .box-t{
        margin-top: 30px;
    }
    .about .box3 .box-c .swiper-slide .text {
        margin-top: 10px;
    }

    .about .box3 .box-c .swiper-slide .more {
        margin-top: 20px;
        width: 40px;
        height: 40px;
    }

    .about .box2 .box-c .r {
        margin-top: 30px;
    }

    .about .box2 .box-c .r .list li .text {
        font-size: 16px;
        margin-top: 10px;
    }

    .about .box2 .box-c .r .list li .text-box {
        width: 60%;
    }

    .about .box1 .box-c {
        margin-top: 30px;
    }

    .about .box1 {
        padding-top: 60px;
    }

    .about .box3,
    .about .box2 .box-c {
        padding: 60px 0;
    }

    .about .box3 .box-c,
    .about .box1 .box-b {
        margin-top: 30px;
    }

    .about .box1 .box-c .text-box {
        margin-top: 10px;
    }

    .about .box1 .box-b .videoBox .playerBtn {
        width: 60px;
        height: 60px;
    }
}

@media (max-width: 500px) {
    .introduction-details .box1 .box-c-l{
        padding-right: 0;
    }
    .introduction-details .box1 .box-c-r{
        margin-top: 20px;
    }
    .introduction-details .box1 .box-t-l .text-des{
        font-size: 16px;
    }
    .introduction-details .box1 .box-t-r{
        padding-top: 20px;
    }
    .introduction-details .box1 .box-t-l .text-box{
        padding: 20px;
    }
    .about .box4 .box-c .list li .text-title,
    .about .box4 .box-c .list li .text-des{
        font-size: 18px;
        line-height: 26px;
    }
    .about .box4 .box-c .list li .text-des{
        padding-left: 46px;
    }
    .about .box4 .box-c .list li{
        padding: 15px;
    }
    .about .box4 .box-c .list li .text-title{
        margin: 0 0 0 10px;
    }
    .about .box4 .box-c .list li .icon{
        width: 36px;
        height: 36px;
    }
    .about .box4 .box-c .list li .icon .iconfont{
        font-size: 20px;
    }
    .about .box4,
    .introduction-details{
        padding: 50px 0;
    }
    .introduction-details .box1 .box-c{
        margin-top: 20px;
    }
    .about .box4 .box-c,
    .about .box4 .box-t{
        margin-top: 25px;
    }
    .about .box1 .box-b .videoBox .text-title,
    .aboutTitle .zh {
        font-size: 20px;
    }

    .aboutTitle .en {
        font-size: 18px;
    }

    .about .box3 .box-c .swiper-slide .text {
        -webkit-line-clamp: 3;
    }

    .about .box3 .box-c .swiper-slide .more {
        margin-top: 10px;
        width: 32px;
        height: 32px;
    }

    .about .box3 .box-c .swiper-slide .more .iconfont {
        font-size: 16px;
    }

    .about .box3 .box-c .swiper-slide .text-title span {
        font-size: 18px;
        padding-right: .5em;
    }

    .about .box3 .box-c .swiper-slide .text {
        font-size: 14px;
        line-height: 24px;
    }

    .about .box3 .box-c .swiper-slide .text-title {
        font-size: 14px;
    }

    .about .box3 .box-c .swiper-slide .text-box {
        padding-left: 18px;
    }

    .about .box2 .box-c .r .list li .text-box::before {
        height: 20px;
        width: 2px;
    }

    .about .box2 .box-c .r .list li .text {
        font-size: 14px;
        line-height: 24px;
    }

    .about .box2 .box-c .r .list li .text-box {
        padding: 0 0 0 15px;
        width: 66.66%;
    }

    .about .box2 .box-c .r {
        margin-top: 25px;
    }

    .about .box1 .box-b .videoBox .playerBtn {
        width: 40px;
        height: 40px;
    }

    .about .box1 .box-c .text-box {
        font-size: 14px;
        line-height: 24px;
    }

    .about .box1 .box-c {
        margin-top: 25px;
    }

    .about .box1 {
        padding-top: 50px;
    }

    .about .box3,
    .about .box2 .box-c {
        padding: 50px 0;
    }

    .about .box3 .box-c,
    .about .box1 .box-b {
        margin-top: 25px;
    }

    .about .box3 .btns .btn {
        width: 36px;
        height: 36px;
    }

    .about .box3 .btns .btn:last-child {
        margin-left: -5px;
    }
}