@media (min-width:650px){
    .business{
        max-width: 1920px;
        margin: 0 auto;
        margin-top: 70px;
    }
    .bg{
        max-width: 1920px;
        height: 350px;
        margin: 0 auto;
        text-align: center;
    }
    .guanyu{
        padding-top: 130px;
        color: #fff;
        font-size: 28px;
    }
    .guanyu1{
        text-align: left;
        padding-left: 200px;
        padding-top: 195px;
        color: #fff;
        font-size: 16px;
    }
    .guanyu1 a{
        color: #fff;
        font-size: 16px;
    }
    .back{
        max-width: 1920px;
        height: 50px;
        background-color: #666;
        color: #fff;
        text-align: center;
        line-height: 50px;
    }
    .cen{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
        /* padding-bottom: 100px; */
    }
    .cen1{
        color: #002fa7;
        font-size: 16px;
        font-weight: 600;
        margin-top: 80px;
    }
    .cen2{
        font-size: 46px;
        color: #222;
        font-weight: 600;
        margin-top: 15px;
    }
    .par{
        margin-top: 50px;
        display: inline-block;
        vertical-align: middle;
        text-align: left;
        font-size: 16px;
        color: #444;
        line-height: 30px;
    }
    .about{
        width: 100%;
        min-height: 3.5417rem;
        /* background: url("/static/images/index/about.png") no-repeat; */
        background-size: cover;
        position: relative;
    }
    .about-main{
        max-width: 1200;
        margin: 0 auto;
        padding: 60px 0 164px;
        box-sizing: border-box;
    }
    .about-nav{
        display: flex;
        justify-content: center;
    }
    .about-nav-title{
        box-sizing: border-box;
        text-align: center;
        font-size: 17px;
        font-weight: bold;
        color: #444444;
        width: 154px;
        height: 44px;
        background-image: url("/static/images/icon/shape4.png");
        background-repeat: no-repeat;
        background-position: bottom center;
        margin-right: 20px;
        cursor: pointer;
    }
    .about-nav-active {
        background-image: url("/static/images/icon/shape-3.png");
    }
    .about-text {
        display: flex;
        flex-wrap: wrap;
    }
    .disman{
        display: flex;
        margin-left: 50px;
        margin-top: 110px;
    }
    .dismain{
        margin-left: 30px;
        text-align: left;
    }
    .disman img{
        width: 75px;
        height: 75px;
        margin-top: 15px;
    }
    .dismain-t{
        font-size: 18px;
        color: #444;
    }
    .dismain-c{
        width: 212px;
        margin-top: 20px;
        color: #666;
        line-height: 30px;
    }

    .center{
        max-width: 1920px;
        background-color: #f4f4f4;
        margin: 0 auto;
    }
    .center1{
        max-width: 1200px;
        margin: 0 auto;
    }

    .btm{
        max-width: 1920px;
        margin: 0 auto;
        height: 750px;
    }
    .btm1{
        max-width: 1200px;
        margin:  0 auto;
        text-align: center;
        position: relative;
    }
    .btm-t{
        font-size: 30px;
        color: #fff;
        padding-top: 75px;
        margin-bottom: 75px;
    }
    .btm-x{
        width: 1200px;
        height: 2px;
        background-color: #fff;
        position: absolute;
        top: 250px;
    }
    .btm-x1{
        width: 12px;
        height: 12px;
        background-color: #fff;
        border-radius: 8px;
        position: absolute;
        top: 246px;
        left: 205px;
    }
    .btm-x2{
        width: 2px;
        height: 44px;
        background-color: #fff;
        position: absolute;
        top: 250px;
        left: 210px;
    }
    .btm-x1a{
        width: 12px;
        height: 12px;
        background-color: #fff;
        border-radius: 8px;
        position: absolute;
        top: 246px;
        left: 605px;
    }
    .btm-x2a{
        width: 2px;
        height: 44px;
        background-color: #fff;
        position: absolute;
        top: 250px;
        left: 610px;
    }
    .btm-x1b{
        width: 12px;
        height: 12px;
        background-color: #fff;
        border-radius: 8px;
        position: absolute;
        top: 246px;
        right: 205px;
    }
    .btm-x2b{
        width: 2px;
        height: 44px;
        background-color: #fff;
        position: absolute;
        top: 250px;
        right: 210px;
    }
    .btm-c{
        display: flex;
    }
    .btm-c1{
        margin-left: 45px;
    }
    .btm-c-t{
        font-size: 18px;
        color: #fff;
    }
    .btm-c-c:hover{
        background-color: #002fa7;
    }
    .btm-c-c:hover .btm-c-cp{
        color: #fff;
    }
    .btm-c-c{
        margin-top: 76px;
        width: 340px;
        height: 280px;
        background-color: #fff;
        border-radius: 10px;
        padding-top: 10px;
    }
    .btm-c-cp{
        color: #676767;
    }
    .btm-c-cp{
        width: 90%;
        margin: 0 auto;
        line-height: 35px;
        text-align: left;
    }

    .un{
        max-width: 1920px;
        margin: 0 auto;
        background-color: #f4f4f4;
        padding-bottom: 70px;
    }
    .un1{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
    }
    .un-t{
        font-size: 30px;
        color: #444;
        padding-top: 65px;
        padding-bottom: 50px;
    }
    .un-c{
        display: flex;
        flex-wrap: wrap;
    }
    .un-c1{
        width: 280px;
        height: 380px;
        background-color: #fff;
        border-radius: 10px;
        text-align: left;
        margin-top: 20px;
        margin-left: 20px;
    }
    .un-c1 img{
        width: 100%;
    }
    .un-c1t{
        margin-left: 25px;
        margin-top: 25px;
        font-size: 18px;
        color: #444;
    }
    .un-c1c{
        margin-left: 25px;
        margin-top: 20px;
        color: #666;
        width: 80%;
        line-height: 30px;
    }
}

@media (max-width:450px){
    .business{
        max-width: 450px;
        margin: 0 auto;
        margin-top: 70px;
    }
    .bg{
        max-width: 450px;
        height: 200px;
        margin: 0 auto;
    }
    .guanyu{
        width: 100%;
        text-align: center;
        padding-top: 90px;
        color: #fff;
        font-size: 28px;
    }
    .guanyu1{
        margin-left: 10px;
        margin-top: 85px;
        color: #aaaaaa;
        font-size: 16px;
    }
    .guanyu1 a{
        color: #fff;
        font-size: 16px;
    }
    .back{
        max-width: 450px;
        height: 50px;
        background-color: #666;
        color: #fff;
        text-align: center;
        line-height: 50px;
    }
    .cen{
        max-width: 450px;
        margin: 0 auto;
        text-align: center;
        padding-bottom: 20px;
    }
    .cen1{
        color: #002fa7;
        font-size: 16px;
        font-weight: 600;
        margin-top: 80px;
    }
    .cen2{
        font-size: 46px;
        color: #222;
        font-weight: 600;
        margin-top: 15px;
    }
    .par{
        width: 90%;
        margin-top: 50px;
        display: inline-block;
        vertical-align: middle;
        text-align: left;
        font-size: 16px;
        color: #444;
        line-height: 30px;
    }
    .about{
        width: 100%;
        min-height: 3.5417rem;
        /* background: url("/static/images/index/about.png") no-repeat; */
        background-size: cover;
        position: relative;
    }
    .about-main{
        max-width: 1200;
        margin: 0 auto;
        padding: 60px 0 164px;
        box-sizing: border-box;
    }
    .about-nav{
        display: flex;
        justify-content: center;
    }
    .about-nav-title{
        box-sizing: border-box;
        text-align: center;
        font-size: 17px;
        font-weight: bold;
        color: #444444;
        width: 154px;
        height: 44px;
        background-image: url("/static/images/icon/shape4.png");
        background-repeat: no-repeat;
        background-position: bottom center;
        margin-right: 20px;
        cursor: pointer;
    }
    .about-nav-active {
        background-image: url("/static/images/icon/shape-3.png");
    }
    .about-text {
        display: flex;
        flex-wrap: wrap;
    }
    .disman{
        display: flex;
        margin-left: 20px;
        margin-top: 50px;
    }
    .dismain{
        margin-left: 30px;
        text-align: left;
    }
    .disman img{
        width: 75px;
        height: 75px;
        margin-top: 15px;
    }
    .dismain-t{
        font-size: 18px;
        color: #444;
    }
    .dismain-c{
        width: 212px;
        margin-top: 20px;
        font-size: 16px;
        color: #666;
        line-height: 30px;
    }

    .center{
        max-width: 450px;
        background-color: #f4f4f4;
        margin: 0 auto;
    }
    .center1{
        max-width: 450px;
        margin: 0 auto;
    }
    .center1 img{
        width: 100%;
    }

    .btm{
        max-width: 450px;
        margin: 0 auto;
        padding-bottom: 50px;
        /* height: 750px; */
    }
    .btm1{
        max-width: 450px;
        margin:  0 auto;
        text-align: center;
        position: relative;
    }
    .btm-t{
        font-size: 30px;
        color: #fff;
        margin-bottom: 75px;
    }

    .btm-c-t{
        margin-top: 30px;
        margin-bottom: 10px;
        font-size: 18px;
        color: #fff;
    }
    .btm-c-c:hover{
        background-color: #002fa7;
    }
    .btm-c-c:hover .btm-c-cp{
        color: #fff;
    }
    .btm-c-c{
        margin-top: 76px;
        width: 340px;
        /* height: 280px; */
        margin:  0 auto;
        background-color: #fff;
        border-radius: 10px;
        padding-top: 10px;
        padding-bottom: 20px;
    }
    .btm-c-cp{
        color: #676767;
        font-size: 16px;
    }
    .btm-c-cp{
        width: 90%;
        margin: 0 auto;
        line-height: 35px;
        text-align: left;
    }

    .un{
        max-width: 1920px;
        margin: 0 auto;
        background-color: #f4f4f4;
        padding-bottom: 70px;
    }
    .un1{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
    }
    .un-t{
        font-size: 30px;
        color: #444;
        padding-top: 65px;
        padding-bottom: 50px;
    }
    .un-c{
        display: flex;
        flex-wrap: wrap;
    }
    .un-c1{
        width: 280px;
        /* height: 380px; */
        padding-bottom: 30px;
        background-color: #fff;
        border-radius: 10px;
        text-align: left;
        margin: 0 auto;
        margin-top: 20px;
    }
    .un-c1t{
        margin-left: 25px;
        margin-top: 25px;
        font-size: 18px;
        color: #444;
    }
    .un-c1c{
        margin-left: 25px;
        margin-top: 20px;
        font-size: 16px;
        color: #666;
        width: 80%;
        line-height: 30px;
    }
}