@media screen and (max-width:1220px) {
    .head, .i_ma, .f_nav, .bq, .pro dl {
        width: 100%;
    }

    .scd {
        width: 95%;
    }

    .scd_a .title {
        font-size: 16px;
        margin-bottom: 10px;
    }
    
    .scd_a .content {
        line-height: 30px;
    }
    
    .scd_a .textPic {
        display: flex;
        justify-content: flex-start;
        width: 95%;
    }

    #main_box .right_box {
        display: inline-block;
        width: 55%;
    }
    
    .scd_a .textPic .img {
        width: 45%;
        height: 45%;
        object-fit: contain;
        text-align: left;
    }

    .head .logo img, .head .logo {
        margin-left: 10px;
        width: 200px;
        height: 54px;
    }

    .head .nav_m {
        width: 700px;
    }

    .nav li {
        margin-left: 18px;
    }

    .i_ma li {
        margin: 0 3px;
    }

    .i_ma li {
        width: 230px;
    }

    .i_ma li img {
        width: 230px;
        height: 115px;
    }

    .f_nav li {
        width: 160px;
    }

    .f_nav li.f_ct {
        width: 200px;
    }

    .f_nav li.f_ct_mail {
        width: 240px;
    }

    .pro dl dt {
        margin-right: 25px;
    }

    .pro dl dd {
        margin-left: 25px;
        width: 480px;
    }

    .scd .scd_r {
        width: 740px;
    }

    .case dl dd {
        width: 555px;
    }

    .contact dt img, .contact dt {
        width: 436px;
        height: 265px;
    }

    .contact dt {
        margin-right: 0;
    }

    .contact dd {
        margin-left: 10%;
        width: 40%;
        float: left;
    }

    .scd .companyInfo .text .content {
        line-height: 25px;
    }
}

@media screen and (max-width:990px) {
    .head, .f_nav, .scd, .pro dl {
        width: 95%;
    }

    .i_ma{
        width: 100%;
    }
    
    .bq{
        width: 100%;
    }

    .head .logo img, .head .logo {
        margin-left: 5px;
    }
    
    /*头部*/
    .header {
        width: 100%;
        background: rgb(0, 140, 214);
        height: 80px;
    }

    .head {
        position: relative;
        margin: auto;
    }

    .nav_m .n_icon {
        display: block;
        top: 30px;
    }

    .head .nav_m {
        margin-top: 0;
    }

    .head .nav_m .nav {
        position: absolute;
        right: 0;
        top: 100px;
        background: #fff;
        z-index: 9999;
        display: none;
    }

    .nav li {
        margin-left: 40px;
    }

    .nav li a {
        font-size: 14px;
        color: #000000;
    }

    .i_line em {
        width: 91px;
        height: 26px;
        margin-left: -13px;
        background-size: 100%;
    }

    .i_ma li {
        margin-bottom: 25px;
        width: 360px;
    }

    .i_ma li img {
        width: 360px;
        height: 180px;
    }

    .f_nav li.f_ct {
        padding-right: 0;
        margin-right: 0;
        background: none;
    }

    .f_nav li {
        min-height: 160px;
        width: 190px;
    }

    .pro dl dt img, .pro dl dt {
        width: 328px;
        height: 230px;
    }

    .pro dl dd {
        width: 310px;
    }

    .scd .scd_r {
        margin-left: 0;
        float: right;
        width: 540px;
    }

    .case dl dd {
        width: 355px;
    }

    .case dl dd .title a {
        font-size: 16px;
    }

    .contact dt img, .contact dt {
        width: 387px;
        height: 235px;
    }

    .contact dd {
        width: 320px;
    }

    .contact dd .c_m span {
        width: 280px;
    }
}

@media screen and (max-width:770px) {

    .pro dl {
        width: 100%;
    }

    .nav li a {
        font-size: 14px;
        color: #000000;
    }

    .nav li {
        margin-left: 0;
    }

    .i_ma li {
        width: 230px;
    }

    .i_ma li img {
        width: 230px;
        height: 115px;
    }

    .f_nav li {
        width: 100px;
    }

    .bq .bq_r {
        width: 60%;
    }

    .scd {
        width: 95%;
        margin: 0px auto;
        text-align: left;
        font-size: 14px;
        color: #000;
        padding: 2px;
        min-width: 100px;
    }

    .scd .companyInfo {
        display:inline;
    }
    
    .scd .companyInfo .text {
        width: 95%;
        margin-left: 2%;
        margin-right: 2%;
    }

    .scd .companyInfo .image {
        height: 40%;
        width: 95%;
        margin-left: 2%;
        margin-right: 2%;
    }

    .scd .about img {
        width: 100%;
        height: auto;
        margin-bottom: 15px;
    }

    .pro dl dt {
        margin-left: 2%;
        width: 96%;
        position: relative;
        display: flex;
        justify-content: center;
        float: left;
        margin-right: 0px;
    }

    .pro dl dt img{
        width: 100%;
        height: 260px;
        object-fit: contain; 
        display: block;
        margin: 0 auto;
    }

    .pro dl dd {
        margin-top: 10px;
        margin-left: 10%;
        width: 100%;
    }

    .scd .scd_l, .scd .scd_r {
        width: 100%;
    }

    .scd_l .s_nav {
        width: 478px;
    }

    .scd .scd_l {
        margin-bottom: 25px;
    }

    .case dl dd {
        width: 295px;
    }

    .pages a {
        margin-bottom: 8px;
    }

    .join img {
        width: 90% !important;
    }

    .contact dt img, .contact dt {
        width: 480px;
        height: 291px;
    }

    .contact dd {
        width: 100%;
    }

    .contact dd .c_m span {
        width: 450px;
    }

    .contact dd .c_logo, .contact dd h6 {
        width: 100%;
        text-align: center;
    }
}

@media screen and (max-width:550px) {

    .head {
        position: relative;
    }

    .head .logo img, .head .logo {
        width: 134px;
        height: 36px;
    }
    
    .bq .bq_l {
        width: 100%;
        height: 20px;
        line-height: 20px;
        text-align: center;
        font-size: 14px;
        color: #FFF;
        display:inline;
        text-align: center;
    }
    
    .bq .bq_l a {
        color: #FFF;
        width: 60px;
        display: inline-block;
    }

    .bq .bq_l, .bq .bq_r {
        width: 100%;
        text-align: left;
    }
    
    .bq .bq_l .firsta {
        margin-left: 0%;
    }

    .bq .bq_l .lasta {
        width:100%;
        display: inline-block;
        text-align: center;
    }

    .head .nav_m .nav li {
        width: 100%;
        text-align: right;
    }
    
    .f_nav {
        width: 95%;
        margin: 0px auto;
        padding: 10px 0 30px;
        display: inline;
        text-align: center;
    }

    .f_nav li {
        width: 95%;
        padding: 0;
        margin-right: 0;
        background: none;
        display: inline-block;
    }

    .f_nav li.f_ct_mail {
        width: 95%;
        padding: 0;
        margin-right: 0;
        background: none;
        display: inline-block;
    }

    .f_nav .firstDiv {
        margin-left: 0%;
    }

    .f_nav li.f_ct {
        width: 90%;
    }

    .f_nav li.f_ct {
        margin-top: 15px;
    }

    .f_nav li .share {
        text-align: left;
    }

    .i_line em {
        margin-left: -50px;
    }

    .i_ma li {
        width: 300px;
    }

    .i_ma li img {
        width: 300px;
        height: 150px;
    }

    .nav_m .n_icon {
        top: 30px;
    }

    .head .nav_m .nav {
        top: 94px;
    }

    .pro dl dd .more {
        margin-bottom: 10px;
    }

    .scd_l .s_nav {
        width: 318px;
    }

    .case dl dt, .case dl dt img {
        width: 320px;
        height: 244px;
    }

    .case dl dt {
        margin-left: 0;
    }

    .case dl dd {
        width: 320px;
        margin-right: 0;
    }

    .join img {
        width: 98% !important;
    }

    .contact dt img, .contact dt {
        width: 320px;
        height: 194px;
    }

    .contact dd .c_m span {
        width: 290px;
    }

    .contact dd .c_logo, .contact dd h6 {
        text-align: left;
        font-size: 14px;
    }
}