body {
        overflow-y: scroll;
    }
    /* nav */
    
    .navbar {
        background-color: rgba(41, 41, 41, 1);
        padding: 0!important;
    }
    /* item1 */
    
    .item1 {
        margin-top: 49px;
    }
    
    .item1 img {
        width: 100%;
    }
    /* item2 */
    
    .item4 .contain,
    .item3 .contain,
    .item2 .contain {
        width: 1280px;
        margin: 0 auto;
        padding: 300px 0;
    }
    
    .item2 .contain {
        padding-top: 12vw;
    }
    
    .item4 .title,
    .item3 .title,
    .item2 .title {
        font-size: 45px;
        max-height: 80px;
        min-height: 30px;
        font-weight: bold;
        text-align: center;
        position: relative;
    }
    
    .item2 .title::after {
        content: 'Enterprise Profile';
        position: absolute;
        color: rgba(0, 0, 0, .1);
        font-size: 110px;
        width: 100%;
        top: -180%;
        left: 50%;
        transform: translate(-50%, 0);
    }
    
    .item2 .text {
        font-size: 22px;
        margin-top: 30px;
        color: #000000;
    }
    
    .item2 .contain .text:nth-child(3) {
        margin-top: 60px;
    }
    /* item3 */
    
    .item3 .contain {
        padding: 0;
    }
    
    .item3 .title::after {
        content: 'Core value';
        position: absolute;
        color: rgba(0, 0, 0, .1);
        font-size: 110px;
        width: 800px;
        top: -180%;
        left: 50%;
        transform: translate(-50%, 0);
    }
    
    .valuebox {
        display: flex;
        margin: 0 30px;
        justify-content: space-between;
    }
    
    .valuebox .one {
        box-shadow: 3px 3px 10px 5px rgb(112 161 204 / 10%);
        width: 350px;
        height: 350px;
        margin-top: 60px;
        padding: 85px 0;
        box-sizing: border-box;
        text-align: center;
        cursor: default;
    }
    
    .valuebox .one:hover {
        box-shadow: 3px 3px 30px 26px rgb(112 161 204 / 10%);
    }
    
    .valuebox .one .img {
        margin: 0 auto;
        width: 80px;
        height: 80px;
        background: url('../../static/img/about/aim.png') no-repeat;
        background-size: contain;
    }
    
    .valuebox .one:nth-child(2) .img {
        background: url('../../static/img/about/mission.png') no-repeat;
        background-size: contain;
    }
    
    .valuebox .one:nth-child(3) .img {
        background: url('../../static/img/about/value.png') no-repeat;
        background-size: contain;
    }
    
    .valuebox .one .head {
        font-size: 30px;
        color: #70A1CC;
        margin: 20px 0 10px;
    }
    
    .valuebox .one .content {
        font-size: 18px;
        color: #272727;
    }
    /* item4 */
    
    .item4 {
        position: relative;
        overflow-x: hidden;
    }
    
    .item4 .contain {
        padding: 300px 0 50px;
    }
    
    .item4 .title::after {
        content: 'Development course';
        position: absolute;
        color: rgba(0, 0, 0, .1);
        font-size: 100px;
        width: 100%;
        top: -180%;
        left: 50%;
        transform: translate(-50%, 0);
    }
    
    .item4 .enpShow {
        margin-top: 60px;
    }
    
    .item4 .enpShow .show {
        display: inline-block;
        font-size: 0;
        width: 420px;
        margin: 0 5px 5px 0;
        height: 175px;
        background-color: #787878;
    }
    
    .swiper-slide {
        background-color: #787878!important;
    }
    
    .swiper .swiper-slide:nth-child(1),
    .item4 .enpShow .show:nth-child(1) {
        background: url('../../static/img/about/enp1.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(2),
    .item4 .enpShow .show:nth-child(2) {
        background: url('../../static/img/about/enp2.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(3),
    .item4 .enpShow .show:nth-child(3) {
        background: url('../../static/img/about/enp3.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(4),
    .item4 .enpShow .show:nth-child(4) {
        background: url('../../static/img/about/enp4.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(5),
    .item4 .enpShow .show:nth-child(5) {
        background: url('../../static/img/about/enp5.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(6),
    .item4 .enpShow .show:nth-child(6) {
        background: url('../../static/img/about/enp6.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(7),
    .item4 .enpShow .show:nth-child(7) {
        background: url('../../static/img/about/enp7.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(8),
    .item4 .enpShow .show:nth-child(8) {
        background: url('../../static/img/about/enp8.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper .swiper-slide:nth-child(9),
    .item4 .enpShow .show:nth-child(9) {
        background: url('../../static/img/about/enp9.jpg') no-repeat;
        background-size: contain;
    }
    
    .swiper {
        display: none;
    }
    /* 主体 */
    /* 最大屏幕 */
    
    @media screen and (min-width: 992px) {}
    
    @media screen and (min-width: 1280px) {
        .item4 .enpShow .show:nth-child(9),
        .item4 .enpShow .show:nth-child(6),
        .item4 .enpShow .show:nth-child(3) {
            margin-right: -5px;
        }
    }
    /* ipad 横向屏幕 */
    
    @media screen and (max-width: 1280px) {
        .item4 .contain,
        .item3 .contain,
        .item2 .contain {
            width: 100%;
        }
        .item2 .contain {
            padding-top: 12vw;
        }
        .item2 .text {
            margin: 2vw 3vw;
        }
        .item2 .contain .text:nth-child(3) {
            margin-top: 3vw;
        }
        .valuebox {
            margin: 0 3vw;
        }
        .valuebox .one {
            margin-top: 3vw;
        }
        .item4 .enpShow {
            width: 100vw;
            margin-top: 3vw;
        }
        .item4 .enpShow .show {
            margin: 0;
            display: block;
            float: left;
            width: 46vw;
            height: 21vw;
        }
        .item4 .enpShow .show:nth-child(odd) {
            margin-left: 3vw;
            margin-right: 1vw;
        }
        .item4 .enpShow .show:nth-child(even) {
            margin-right: 3vw;
            margin-left: 1vw;
        }
        /* 公司历程 */
        .item4 .contain {
            overflow: hidden;
        }
        .item4 .timeBigBox {
            width: 96vw;
            margin: 5vw 2vw 0;
        }
        .item4 .timeboxOut {
            height: 35vw;
        }
        .item4 .timeboxIn {
            width: 17vw;
            height: 17vw;
            left: -2%;
        }
        .item4 .time-text {
            font-size: 1vw;
            width: 13vw;
            height: 13vw;
        }
        .item4 .time-text .year {
            font-size: 1.5vw;
        }
        .item4 .down {
            top: 28%;
        }
        .marginLine2,
        .marginLine {
            display: none;
        }
        /*清除浮动*/
        .clearfix:after {
            content: "";
            height: 0;
            line-height: 0;
            display: block;
            visibility: hidden;
            clear: both;
        }
        .clearfix {
            /*兼容IE*/
            zoom: 1;
        }
    }
    /* ipad 纵向屏幕 */
    
    @media screen and (max-width: 992px) {
        /* item1 */
        .item1 img {
            content: url('../../static/img/about/about-bg1.jpg');
        }
        .item2 .text {
            font-size: 3vw;
            margin: 4vw 3vw;
        }
        .item2 .contain .text:nth-child(3) {
            margin-top: 9vw;
        }
        .contain,
        .item2 .contain {
            width: 100vw!important;
            padding: 33vw 0;
        }
        .item2 .contain {
            padding-top: 20vw;
        }
        .item2 .title,
        .item3 .title,
        .item4 .title,
        .item5 .title {
            font-size: 5vw;
        }
        .item2 .title::after,
        .item3 .title::after,
        .item4 .title::after,
        .item5 .title::after {
            font-size: 9vw;
            width: 100vw;
            top: -13vw;
            left: 0;
            transform: translate(0, 0);
        }
        .valuebox .one {
            display: flex;
            align-items: center;
            flex-direction: column;
            justify-content: center;
            width: 30vw;
            height: 30vw;
            padding: 0;
            margin-top: 9vw;
            box-shadow: 2px 2px 7px 2px rgb(112 161 204 / 10%);
        }
        .valuebox .one:hover {
            box-shadow: 2px 2px 20px 10px rgb(112 161 204 / 10%);
        }
        .valuebox .one .img {
            width: 7vw;
            height: 7vw;
            margin: 0;
        }
        .valuebox .one .head {
            font-size: 3vw;
            margin: 1vw 0 0.5vw;
        }
        .valuebox .one .content {
            font-size: 2vw;
        }
        .item4 .contain {
            padding: 33vw 0 10vw;
        }
        /* 历程 */
        .item4 .timeBigBox {
            height: 260vw;
            margin: 13vw 2vw 20vw;
            flex-direction: column;
        }
        .item4 .timeboxIn {
            width: 50vw;
            height: 50vw;
            left: 42.5%;
            top: 15%;
        }
        .item4 .time-text {
            font-size: 3vw;
            width: 24vw;
            height: 24vw;
            top: 25%;
            left: 25%;
        }
        .item4 .time-text .year {
            font-size: 4.5vw;
        }
        .item4 .down {
            top: 15%;
            left: 9%;
        }
        .item4 .time-text4 {
            top: 21%;
            left: 21%;
        }
        /* 两边的横条 */
        .item4 .marginLine992 {
            width: 50vw;
            position: absolute;
            top: 61%;
            height: 11vw;
            background-color: #70A1CC;
            display: block;
            transform: translateX(-4vw);
        }
        .item4 .marginLine993 {
            width: 50vw;
            position: absolute;
            top: 62%;
            right: 0;
            height: 11vw;
            background-color: #333;
            display: block;
            transform: translateX(4vw);
        }
    }
    /*  phone屏幕 */
    
    @media screen and (max-width: 450px) {
        /* item1 */
        .item1 img {
            content: url('../../static/img/about/about-bg2.jpg');
        }
        .item2 .text {
            font-size: 4vw;
        }
        .item2 .title,
        .item3 .title,
        .item4 .title,
        .item5 .title {
            font-size: 7vw;
        }
        .valuebox .one {
            width: 31vw;
            height: 55vw;
            box-shadow: 2px 1px 2px 2px rgb(112 161 204 / 10%);
        }
        .valuebox .one:hover {
            box-shadow: 0px 0px 12px 6px rgb(112 161 204 / 10%);
        }
        .valuebox .one .img {
            width: 12vw;
            height: 12vw;
            margin: 0;
        }
        .valuebox .one .head {
            font-size: 6vw;
            margin: 2vw 0 0.5vw;
        }
        .valuebox .one .content {
            font-size: 3.5vw;
            margin: 0 5vw;
        }
        .item4 .contain {
            padding: 33vw 0 25vw;
        }
        .swiper-button-next:after,
        .swiper-button-prev:after {
            font-size: 8vw;
        }
        /* 历程 */
        .item4 .time-text {
            font-size: 3vw;
            width: 30vw;
            height: 30vw;
            top: 27%;
            left: 27%;
        }
        .item4 .time-text4 {
            top: 21%;
            left: 21%;
        }
        .item4 .time-text .year {
            font-size: 4vw;
        }
    }
    
    .timeBigBox {
        position: relative;
        z-index: 2;
        margin-top: 100px;
        width: 1280px;
        background-color: #fff;
        display: flex;
    }
    
    .timeboxOut {
        flex: 1;
        /* background-color: #e5e5e5; */
        border: 1px solid #fff;
        height: 500px;
        position: relative;
    }
    
    .timeboxIn {
        width: 250px;
        height: 250px;
        /* opacity: 0.5; */
        background-color: #70A1CC;
        position: absolute;
        top: 0;
        transform: rotate(45deg);
        left: -8%;
        z-index: 99;
    }
    
    .down {
        top: 35%;
        background-color: #333;
    }
    
    .time-text {
        position: absolute;
        top: 20%;
        left: 20%;
        font-size: 14px;
        transform: rotate(-45deg);
        width: 150px;
        height: 150px;
        color: #fff;
    }
    
    .time-text .year {
        font-weight: 700;
        font-size: 30px;
    }
    
    .down .time-text {
        color: #ffffff;
    }
    
    .marginLine993,
    .marginLine992 {
        display: none;
    }
    
    .marginLine2,
    .marginLine {
        width: 50vw;
        height: 45px;
        position: absolute;
    }
    
    .marginLine {
        background-color: #70A1CC;
        top: 57%;
        left: 0;
    }
    
    .marginLine2 {
        background-color: #333;
        top: 74%;
        right: 0;
    }