@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;
    }
    .top{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
        padding-bottom: 100px;
    }
    .top1{
        color: #002fa7;
        font-size: 16px;
        font-weight: 600;
        margin-top: 80px;
    }
    .top2{
        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;
    }
    .cen{
        max-width: 1920px;
        margin: 0 auto;
        background-color: #f4f4f4;
    }
    .cens{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
        padding-bottom: 70px;
    }
    .cens-t{
        font-size: 30px;
        color: #444444;
        padding-top: 65px;
        margin-bottom: 70px;
    }
    .cens-c{
        display: flex;
        flex-wrap: wrap;
    }
    .cens-c1{
        margin-top: 15px;
        margin-left: 15px;
        cursor: pointer;
        position: relative;
    }
    .cens-c1 img{
        width: 220px;
        height: 227px;
    }
    .cens-c1:hover .tou{
        display: block;
    }
    .cens-c1:hover .tou1{
        display: block;
    }
    .tou{
        position: absolute;
        top: 0;
        width: 220px;
        height: 227px;
        background-color: #000;
        opacity: 0.7;
        display: none;
    }
    .tou1{
        position: absolute;
        top: 65px;
        width: 220px;
        display: none;
    }
    .tou-t{
        font-size: 18px;
        color: #fff;
        opacity: 1;
    }
    .tou-x{
        width: 140px;
        height: 1px;
        background-color: #fff;
        margin: 0 auto;
        margin-top: 20px;
        margin-bottom: 20px;
    }
    .tou-u{ 
        color: #fff;
    }

    .center{
        max-width: 1920px;
        margin: 0 auto;
        height: 860px;
        text-align: center;
    }
    .center-t{
        font-size: 30px;
        color: #fff;
        padding-top: 75px;
    }
    .center-c{
        font-size: 16px;
        color: #fff;
        margin-top: 35px;
    }
    .center-u{
        margin-top: 70px;
    }

    .un{
        max-width: 1920px;
        margin: 0 auto;
        background-color: #f4f4f4;
    }
    .un1{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
        padding-bottom: 80px;
    }
    .un1-t{
        font-size: 30px;
        color: #444;
        padding-top: 70px;
        margin-bottom: 70px;
    }
    .un1-c{
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
    }
    .un1-c1{
        width: 380px;
        height: 200px;
        background-color: #fff;
        border-radius: 10px;
        margin-top: 15px;
        margin-left: 15px;
    }
    .un1-c1-t{
        display: flex;
        padding-top: 32px;
        margin-left: 26px;
    }
    .rec{
        width: 4px;
        height: 17px;
        background-color: #002fa7;
        margin-top: 2px;
    }
    .rec1{
        font-size: 18px;
        color: #444;
        margin-left: 11px;
    }
    .un1-c1-x{
        width: 340px;
        height: 1px;
        background-color: #dadada;
        margin: 0 auto;
        margin-top: 27px;
        margin-bottom: 27px;
    }
    .un1-c1-u{
        width: 340px;
        margin: 0 auto;
        text-align: left
    }
}

@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;
    }
    .top{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
        padding-bottom: 100px;
    }
    .top1{
        color: #002fa7;
        font-size: 16px;
        font-weight: 600;
        margin-top: 80px;
    }
    .top2{
        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;
    }
    .cen{
        max-width: 450px;
        margin: 0 auto;
        background-color: #f4f4f4;
    }
    .cens{
        max-width: 450px;
        margin: 0 auto;
        text-align: center;
        padding-bottom: 70px;
    }
    .cens-t{
        font-size: 30px;
        color: #444444;
        padding-top: 65px;
        margin-bottom: 70px;
    }
    .cens-c{
        display: flex;
        flex-wrap: wrap;
    }
    .cens-c1{
        margin: 0 auto;
        margin-top: 15px;
        cursor: pointer;
        position: relative;
    }
    .cens-c1 img{
        width: 220px;
        height: 227px;
    }
    .cens-c1:hover .tou{
        display: block;
    }
    .cens-c1:hover .tou1{
        display: block;
    }
    .tou{
        position: absolute;
        top: 0;
        width: 220px;
        height: 227px;
        background-color: #000;
        opacity: 0.7;
        display: none;
    }
    .tou1{
        position: absolute;
        top: 65px;
        width: 220px;
        display: none;
    }
    .tou-t{
        font-size: 18px;
        color: #fff;
        opacity: 1;
    }
    .tou-x{
        width: 140px;
        height: 1px;
        background-color: #fff;
        margin: 0 auto;
        margin-top: 20px;
        margin-bottom: 20px;
    }
    .tou-u{ 
        color: #fff;
    }

    .center{
        max-width: 1920px;
        margin: 0 auto;
        height: 460px;
        text-align: center;
    }
    .center-t{
        font-size: 30px;
        color: #fff;
        padding-top: 75px;
    }
    .center-c{
        font-size: 16px;
        color: #fff;
        margin-top: 35px;
    }
    .center-u{
        margin-top: 70px;
        width: 90%;
    }

    .un{
        max-width: 1920px;
        margin: 0 auto;
        background-color: #f4f4f4;
    }
    .un1{
        max-width: 1200px;
        margin: 0 auto;
        text-align: center;
        padding-bottom: 80px;
    }
    .un1-t{
        font-size: 30px;
        color: #444;
        padding-top: 70px;
        margin-bottom: 70px;
    }
    .un1-c{
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
    }
    .un1-c1{
        width: 380px;
        /* height: 200px; */
        padding-bottom: 20px;
        background-color: #fff;
        border-radius: 10px;
        margin-top: 15px;
        /* margin-left: 15px; */
    }
    .un1-c1-t{
        display: flex;
        padding-top: 32px;
        margin-left: 26px;
    }
    .rec{
        width: 4px;
        height: 17px;
        background-color: #002fa7;
        margin-top: 2px;
    }
    .rec1{
        font-size: 18px;
        color: #444;
        margin-left: 11px;
    }
    .un1-c1-x{
        width: 340px;
        height: 1px;
        background-color: #dadada;
        margin: 0 auto;
        margin-top: 27px;
        margin-bottom: 27px;
    }
    .un1-c1-u{
        width: 340px;
        font-size: 16px;
        margin: 0 auto;
        text-align: left
    }
}