@media (min-width: 1200px) {
    /* banner */
    .banner_wrap{
        height: 324px;
        position: relative;
    }
    .banner_wrap img{
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: revert;
        z-index: 1;
    }
    .banner_box{
        position: absolute;
        z-index: 2;
        width: 100%;
    }
    .banner_con{
        margin: 0 auto;
    }
    .banner_con p{
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .banner_con span{
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        color: #7C8A82;
    }
    .banner_con span:nth-child(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 20px;
        color: #FFFFFF;
        display: inline-block;
        border-bottom: 1px solid #FFFFFF;
    }
    .banner_con h2{
        font-size: 60px;
        font-family: Avenir;
        font-weight: 500;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .about{
        padding-bottom: 200px;
        background: url(../img/about_bg@2x.png) no-repeat;
        background-size: 100% 100%;
        margin-top: 90px;
    }
    .about_title{
        font-size: 56px;
        font-family: Avenir;
        font-weight: 500;
        color: #404040;
        text-align: center;
        padding-top: 27px;
        padding-bottom: 40px;
    }
    .about_l{
        position: relative;
        width: 530px;
        height: 361px;
        background: #FFFFFF;
        box-shadow: 0px 3px 18px rgba(0, 0, 0, 0.06);
        border-radius: 4px;
        border-bottom: 5px solid #92D050 ;
    }
    .about_l > p,.about_r > p{
        width: 463px;
        height: 273px;
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
        margin: 46px auto 0;
    }
    .about_r{
        position: relative;
        width: 530px;
        height: 361px;
        background: #F8F8F8;
        border-radius: 4px;
        margin-left: 70px;
    }
    .about_dingwei{
        position: absolute;
        left: 0;
        width: 100%;
        top: 320px;
        text-align: center;
    }
    .about_dingwei img{
        width: 86px;
        height: 86px;
    }
    .about_dingwei p:nth-of-type(1){
        font-size: 20px;
        font-family: Arial;
        font-weight: bold;
        line-height: 23px;
        color: #404040;
        margin-top: 20px;
    }
    .about_dingwei p:nth-of-type(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
    }
    .about_dingwei{
        position: absolute;
        left: 0;
        width: 100%;
        top: 320px;
        text-align: center;
    }
    .about_dingwei img{
        width: 86px;
        height: 86px;
    }
    .about_dingwei p:nth-of-type(1){
        font-size: 20px;
        font-family: Arial;
        font-weight: bold;
        line-height: 23px;
        color: #404040;
        margin-top: 20px;
    }
    .about_dingwei p:nth-of-type(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
    }
 }
 @media (min-width: 980px) and (max-width: 1199px){
     /* banner */
    .banner_wrap{
        height: 324px;
        position: relative;
    }
    .banner_wrap img{
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: revert;
        z-index: 1;
    }
    .banner_box{
        position: absolute;
        z-index: 2;
        width: 100%;
    }
    .banner_con{
        margin: 0 auto;
    }
    .banner_con p{
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .banner_con span{
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        color: #7C8A82;
    }
    .banner_con span:nth-child(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 20px;
        color: #FFFFFF;
        display: inline-block;
        border-bottom: 1px solid #FFFFFF;
    }
    .banner_con h2{
        font-size: 60px;
        font-family: Avenir;
        font-weight: 500;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .about{
        padding-bottom: 200px;
        background: url(../img/about_bg@2x.png) no-repeat;
        background-size: 100% 100%;
        margin-top: 90px;
    }
    .about_title{
        font-size: 56px;
        font-family: Avenir;
        font-weight: 500;
        color: #404040;
        text-align: center;
        padding-top: 27px;
        padding-bottom: 40px;
    }
    .about_l{
        position: relative;
        width: 400px;
        height: 361px;
        background: #FFFFFF;
        box-shadow: 0px 3px 18px rgba(0, 0, 0, 0.06);
        border-radius: 4px;
        border-bottom: 5px solid #92D050 ;
    }
    .about_l > p,.about_r > p{
        width: 380px;
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
        margin: 15px auto 0;
        padding-bottom: 20px;
    }
    .about_r{
        position: relative;
        width: 400px;
        height: 361px;
        background: #F8F8F8;
        border-radius: 4px;
        margin-left: 70px;
    }
    .about_dingwei{
        position: absolute;
        left: 0;
        width: 100%;
        top: 320px;
        text-align: center;
    }
    .about_dingwei img{
        width: 86px;
        height: 86px;
    }
    .about_dingwei p:nth-of-type(1){
        font-size: 20px;
        font-family: Arial;
        font-weight: bold;
        line-height: 23px;
        color: #404040;
        margin-top: 20px;
    }
    .about_dingwei p:nth-of-type(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
    }
    .about_dingwei{
        position: absolute;
        left: 0;
        width: 100%;
        top: 320px;
        text-align: center;
    }
    .about_dingwei img{
        width: 86px;
        height: 86px;
    }
    .about_dingwei p:nth-of-type(1){
        font-size: 20px;
        font-family: Arial;
        font-weight: bold;
        line-height: 23px;
        color: #404040;
        margin-top: 20px;
    }
    .about_dingwei p:nth-of-type(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
    }
 }
 @media (min-width: 768px) and (max-width: 980px){
    /* banner */
    .banner_wrap{
        height: 200px;
        position: relative;
    }
    .banner_wrap img{
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: revert;
        z-index: 1;
    }
    .banner_box{
        position: absolute;
        z-index: 2;
        width: 100%;
    }
    .banner_con{
        margin: 0 auto;
    }
    .banner_con p{
        font-size: 14px;
        font-family: Arial;
        font-weight: 400;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .banner_con span{
        font-size: 14px;
        font-family: Arial;
        font-weight: 400;
        color: #7C8A82;
    }
    .banner_con span:nth-child(2){
        font-size: 14px;
        font-family: Arial;
        font-weight: 400;
        line-height: 20px;
        color: #FFFFFF;
        display: inline-block;
        border-bottom: 1px solid #FFFFFF;
    }
    .banner_con h2{
        font-size: 30px;
        font-family: Avenir;
        font-weight: 500;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .about{
        background: url(../img/about_bg@2x.png) no-repeat;
        background-size: 100% 100%;
        margin-top: 40px;
        padding-bottom: 200px;
    }
    .about_title{
        font-size: 24px;
        font-family: Avenir;
        font-weight: 500;
        color: #404040;
        text-align: center;
        padding-top: 27px;
        padding-bottom: 40px;
    }
    .about_l{
        position: relative;
        background: #FFFFFF;
        box-shadow: 0px 3px 18px rgba(0, 0, 0, 0.06);
        border-radius: 4px;
        border-bottom: 5px solid #92D050 ;
    }
    .about_l > p,.about_r > p{
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
        margin: 46px auto 46px;
    }
    .about_r{
        position: relative;
        background: #F8F8F8;
        border-radius: 4px;
        margin-top: 100px;
    }
    .about_dingwei{
        position: absolute;
        left: 0;
        width: 100%;
        bottom: -90px;
        text-align: center;
    }
    .about_dingwei img{
        width: 40px;
        height: 40px;
        border-radius: 50%;
        box-shadow: 5px 5px 5px #eee;
    }
    .about_dingwei p:nth-of-type(1){
        font-size: 20px;
        font-family: Arial;
        font-weight: bold;
        line-height: 23px;
        color: #404040;
        margin: 0;
    }
    .about_dingwei p:nth-of-type(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
    }
 }
 @media screen and (max-width:769px) {
   /* banner */
    .banner_wrap{
        height: 200px;
        position: relative;
    }
    .banner_wrap img{
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: revert;
        z-index: 1;
    }
    .banner_box{
        position: absolute;
        z-index: 2;
        width: 100%;
    }
    .banner_con{
        margin: 0 auto;
    }
    .banner_con p{
        font-size: 14px;
        font-family: Arial;
        font-weight: 400;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .banner_con span{
        font-size: 14px;
        font-family: Arial;
        font-weight: 400;
        color: #7C8A82;
    }
    .banner_con span:nth-child(2){
        font-size: 14px;
        font-family: Arial;
        font-weight: 400;
        line-height: 20px;
        color: #FFFFFF;
        display: inline-block;
        border-bottom: 1px solid #FFFFFF;
    }
    .banner_con h2{
        font-size: 30px;
        font-family: Avenir;
        font-weight: 500;
        color: #FFFFFF;
        margin: 110px 0 0 0;
    }
    .about{
        padding-bottom: 200px;
        background: url(../img/about_bg@2x.png) no-repeat;
        background-size: 100% 100%;
        margin-top: 40px;
    }
    .about_title{
        font-size: 24px;
        font-family: Avenir;
        font-weight: 500;
        color: #404040;
        text-align: center;
        padding-top: 27px;
        padding-bottom: 40px;
    }
    .about_l{
        position: relative;
        background: #FFFFFF;
        box-shadow: 0px 3px 18px rgba(0, 0, 0, 0.06);
        border-radius: 4px;
        border-bottom: 5px solid #92D050 ;
    }
    .about_l > p,.about_r > p{
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
        margin: 46px auto 46px;
    }
    .about_r{
        position: relative;
        background: #F8F8F8;
        border-radius: 4px;
        margin-top: 100px;
    }
    .about_dingwei{
        position: absolute;
        left: 0;
        width: 100%;
        bottom: -90px;
        text-align: center;
    }
    .about_dingwei img{
        width: 40px;
        height: 40px;
        border-radius: 50%;
        box-shadow: 5px 5px 5px #eee;
    }
    .about_dingwei p:nth-of-type(1){
        font-size: 20px;
        font-family: Arial;
        font-weight: bold;
        line-height: 23px;
        color: #404040;
        margin: 0;
    }
    .about_dingwei p:nth-of-type(2){
        font-size: 17px;
        font-family: Arial;
        font-weight: 400;
        line-height: 35px;
        color: #7C8A82;
    }
 }