.about {
    background-color: #FAFAFA;
}

.about .box1 {
    padding: 94px 0 119px;
}

.aboutTitle .en {
    font-family: MiSans-Light;
    color: #222222;
    line-height: 1;
}

.aboutTitle .zh {
    font-family: MiSans-Bold;
    color: #222222;
    line-height: 1;
    margin-top: 20px;
}

.about .box4 .box-c,
.about .box1 .box-c {
    width: 1016px;
    max-width: 100%;
    margin: 0 0 0 auto;
    font-family: MiSans;
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
}

.about .box1 .box-c .text-title {
    font-family: MiSans;
    font-weight: 400;
    color: #222222;
    line-height: 1.6;
}

.about .box1 .box-b {
    margin-top: 56px;
}

.about .box4 .box-b .pic,
.about .box1 .box-b .pic {
    border-radius: 5px;
}

.about .box2 {
    position: relative;
    min-height: 100vh;
    padding-bottom: 89px;
}

.about .box2 .box-c {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.about .box2 .l {
    position: sticky;
    top: 119px;
}

.about .box2 .r {
    flex: 1;
    margin-left: 231px;
}

.about .box2 .r .list li {
    padding: 44px 0 37px;
    border-bottom: 1px solid #DEDEDE;
}

.about .box2 .r .list li:first-child {
    padding-top: 0;
}

.about .box2 .r .list li .date {
    font-family: MiSans-Bold;
    font-size: 24px;
    color: #222222;
    line-height: 1;
    transition: all .6s;
}

.about .box2 .r .list li:hover .date {
    color: #E00011;
}

.about .box2 .r .list li .text-title {
    font-family: MiSans;
    font-weight: 400;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
    margin-top: 14px;
}

.about .box3 {
    padding: 120px 0 168px;
    background-color: #fff;
}

.about .box3 .box-c {
    margin-top: 44px;
}

.about .box3 .box-c .swiper-slide {
    width: 23.21%;
}

.about .box3 .box-c .swiper-slide:not(:last-child) {
    margin-right: 2.38%;
}

.about .box3 .box-c .swiper-slide .picCover {
    padding-top: 69.84%;
}

.about .box3 .box-c .swiper-slide .picCover img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
}

.about .box3 .btns {
    margin-top: 50px;
    display: flex;
    gap: 20px;
}

.about .box3 .btns .btn {
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    color: #999;
    border: 1px solid rgba(222, 222, 222, 0.8);
    transition: all .6s;
    cursor: pointer;
}

.about .box3 .btns .btn:not(.swiper-button-disabled):hover {
    background-color: #E00011;
    color: #fff;
    border-color: #E00011;
}

.about .box3 .btns .btn.swiper-button-disabled {
    opacity: .5;
    cursor: not-allowed;
}

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

.about .box4 {
    padding: 119px 0 140px;
}

.about .box4 .box-c {
    font-size: 18px;
    line-height: 36px;
}

.about .box4 .box-b {
    margin-top: 82px;
}

@media (max-width:1400px) {
    .about .box2 .r {
        margin-left: 131px;
    }
}

@media (max-width: 1280px) {

    .about .box4 .box-c,
    .about .box1 .box-c {
        margin-top: 10px;
    }
}

@media (max-width: 1199px) {
    .about .box2 .r {
        margin-left: 68px;
    }

    .about .box4,
    .about .box3,
    .about .box1 {
        padding: 80px 0;
    }

    .about .box2 {
        padding-bottom: 80px;
    }

    .about .box4 .box-b,
    .about .box3 .btns,
    .about .box1 .box-b {
        margin-top: 45px;
    }
}

@media (max-width: 1024px) {
    .about .box3 .btns .btn{
        width: 40px;
        height: 40px;
    }
    .about .box3 .btns .btn .iconfont{
        font-size: 14px;
    }
    .aboutTitle .zh{
        margin-top: 10px;
    }
    .about .box2 .l{
        position: relative;
        top: 0;
    }
    .about .box2 .r .list li .date{
        font-size: 20px;
    }
    .about .box2 .box-c{
        flex-direction: column;
    }
    .about .box2 .r{
        margin-left: 0;
        width: 100%;
        margin-top: 40px;
    }
    .about .box2 .r .list li{
        padding: 35px 0 28px;
    }
    .about .box4,
    .about .box3,
    .about .box1 {
        padding: 70px 0;
    }

    .about .box2 {
        padding-bottom: 70px;
    }

    .about .box4 .box-b,
    .about .box3 .box-c,
    .about .box3 .btns,
    .about .box1 .box-b {
        margin-top: 40px;
    }
    .about .box2{
        min-height: 0;
    }
    .about .box4 .box-c{
        font-size: 16px;
        line-height: 30px;
    }
}

@media (max-width: 768px) {
    .about .box3 .box-c .swiper-slide{
        width: 32%;
    }
    .about .box3 .box-c .swiper-slide:not(:last-child){
        margin-right: 2%;
    }
    .about .box2 .r{
        margin-top: 30px;
    }
    .about .box2 .r .list li{
        padding: 28px 0 21px;
    }
    .about .box4,
    .about .box3,
    .about .box1 {
        padding: 60px 0;
    }

    .about .box2 {
        padding-bottom: 60px;
    }

    .about .box4 .box-b,
    .about .box3 .box-c,
    .about .box3 .btns,
    .about .box1 .box-b {
        margin-top: 30px;
    }
}

@media (max-width: 500px) {
    .about .box3 .box-c .swiper-slide{
        width: 48.5%;
    }
    .about .box3 .box-c .swiper-slide:not(:last-child){
        margin-right: 3%;
    }
    .about .box2 .r .list li{
        padding: 22px 0 15px;
    }
    .about .box2 .r .list li .date{
        font-size: 18px;
    }
    .about .box2 .r{
        margin-top: 25px;
    }
    .about .box2 .r .list li .text-title{
        margin-top: 6px;
    }
    .about .box4,
    .about .box3,
    .about .box1 {
        padding: 50px 0;
    }

    .about .box2 {
        padding-bottom: 50px;
    }

    .about .box4 .box-b,
    .about .box3 .box-c,
    .about .box3 .btns,
    .about .box1 .box-b {
        margin-top: 25px;
    }
}