.page_about_us {
    background: #fff;
    padding: 4.7% var(--all-pd) 6.25%
}

.page_about_us .box1 {
    align-items: unset;
    flex-wrap: wrap;
    height: 710px;
    --txt-w: 44%;
    --mp: 40px
}

.page_about_us .box1 .txt {
    width: var(--txt-w)
}

.page_about_us .box1 .txt p {
    font-weight: 400;
    font-size: 16px;
    color: #777;
    line-height: 28px;
    margin-top: 90px;
}

.page_about_us .box1 .txt p:first-child {
    margin-top: 0
}

.page_about_us .box1 .imgs {
    width: calc(100% - var(--txt-w) - var(--mp));
    position: relative
}

.page_about_us .box1 .imgs .cont {
    width: 184px;
    height: 184px;
    padding: 20px;
    border: 24px solid #ffffff;
    border-radius: 36px;
    background: var(--color-bg);
    position: absolute;
    left: 30%;
    top: 37%
}

.page_about_us .box1 .imgs .cont span {
    font-weight: bold;
    font-size: 24px
}

.page_about_us .box1 .imgs .cont span:last-child {
    font-size: 16px;
    margin-top: 10px
}

.page_about_us .box1 .imgs>div {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%
}

.page_about_us .box1 .imgs>div .img:nth-child(1) {
    width: 264px;
    height: 312px;
    left: 44px;
    top: 0
}

.page_about_us .box1 .imgs>div .img:nth-child(2) {
    width: 311px;
    height: 368px;
    left: 0;
    bottom: 0
}

.page_about_us .box1 .imgs>.img {
    width: 57.1%;
    height: 642px;
    top: 10px;
    right: 0
}

.page_about_us>.desc {
    margin-top: 45px;
    font-weight: 400;
    font-size: 16px;
    color: #777;
    line-height: 28px
}

.page_about_us>.desc * {
    font-weight: 400;
    font-size: 16px;
    color: #777;
    line-height: 28px
}

.page_about_us .history {
    /* margin-top: 8.1% */
}

.page_about_us .history .tit {
    text-transform: uppercase
}

.page_about_us .history .his_swiper {
    margin-top: 32px
}

.page_about_us .history .his_swiper .swiper-slide-active .line::after {
    background-image: url(../images/aboutus/icon5.png)
}

.page_about_us .history .his_swiper .time {
    font-weight: bold;
    font-size: 48px;
    color: #000000;
    line-height: 1;
    text-align: center
}

.page_about_us .history .his_swiper .line {
    width: 100%;
    height: 2px;
    background: #000;
    margin: 30px 0;
    position: relative
}

.page_about_us .history .his_swiper .line::after {
    content: "";
    display: block;
    width: 30px;
    height: 30px;
    background-image: url(../images/aboutus/icon4.png);
    background-repeat: no-repeat;
    background-size: cover;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: -15px
}

.page_about_us .history .his_swiper .desc {
    font-weight: 400;
    font-size: 16px;
    color: #777;
    line-height: 28px;
    padding: 0 20px
}

.cer {
    padding: 6.25% var(--all-pd);
    background: #fff
}

.cer .cer_swiper .swiper-slide .img {
    padding-bottom: 139.88%
}

.mou4 {
    padding: 0 var(--all-pd) 6.25%;
    background: #fff
}

.mou4 .mou4_swiper .swiper-slide .img {
    padding-bottom: 60%
}

.mou4_swiper{
    margin-top: 3%;
}

@media screen and (max-width:1660px) {
    .page_about_us {
        padding: 3% var(--all-pd) 5%
    }

    .page_about_us>.desc {
        margin-top: 35px
    }

    .page_about_us .history {
        margin-top: 5%
    }

    .page_about_us .history .his_swiper .time {
        font-size: 38px
    }

    .cer {
        padding: 4% var(--all-pd)
    }

    .mou4 {
        padding: 0 var(--all-pd) 4%
    }

    .page_about_us .box1 .txt p {
        margin-top: 60px
    }
}

@media screen and (max-width:1366px) {
    .page_about_us {
        padding: 3% var(--all-pd) 3%
    }

    .page_about_us .box1 .txt p {
        margin-top: 30px
    }

    .page_about_us .history {
        margin-top: 3%
    }

    .page_about_us .history .his_swiper .time {
        font-size: 30px
    }

    .cer {
        padding: 3% var(--all-pd)
    }

     .mou4 {
        padding: 0 var(--all-pd) 3%
    }

    .page_about_us .box1 {
        --txt-w: 34%;
        --mp: 20px
    }
}

@media screen and (max-width:1100px) {
    .page_about_us .box1 {
        height: auto;
    }

    .page_about_us .box1 .txt {
        width: 100%;
        order: 2;
    }

    .page_about_us .box1 .imgs {
        width: 100%;
        margin-bottom: 20px;
    }

    .page_about_us .box1 .imgs>div {
        width: 39%;
    }

    .page_about_us .box1 .imgs>div .img:nth-child(1) {
        width: calc(100% - 44px);
        height: 252px;
    }

    .page_about_us .box1 .imgs>div .img:nth-child(2) {
        width: 100%;
    }
}

@media screen and (max-width:950px) {
    .page_about_us .box1 {
        height: unset
    }

    .page_about_us .box1 .txt {
        width: 100%;
        margin: 0
    }

    .page_about_us .box1 .imgs {
        display: none
    }

    .page_about_us .box1 .txt p {
        max-height: unset
    }

    .page_about_us .history {
        margin-top: 30px
    }

    .page_about_us .box1 .txt p,
    .page_about_us>.desc {
        margin-top: 20px
    }

    .page_about_us .history .his_swiper .time {
        font-size: 24px
    }

    .cer {
        padding: 30px var(--all-pd)
    }

     .mou4 {
        padding: 0 var(--all-pd) 30px
    }
}