.about_top .about_top_dec {
    text-align: center;
}

@media (min-width: 768px) {
    .about_top {
        background: url("../images/p_about1.jpg") no-repeat center/cover;
    }

    /*中部上半部*/
    .about_middle1 {
        background: url("../images/p_about2.png") no-repeat center/cover;
    }

    .about_middle1 .about_middle1_dec ul {
        float: right;
    }

    .about_middle1 .about_middle1_dec li span {
        color: #c8c8c8;
    }

    /*中部中间部分*/
    .about_middle2 {
        background-color: rgb(31, 31, 31);
    }

    .about_middle2 .about_middle2_dec1 {
        overflow: hidden;
        width: 100%;
    }

    .about_middle2 .about_middle2_dec2 {
        overflow: hidden;
        width: 100%;
    }

    .about_middle2 .about_middle2_dec ul li {
        width: 50%;
        float: left;
        position: relative;
    }

    .about_middle2 .about_middle2_dec ul li > img {
        width: 100%;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {
        color: #c8c8c8;
        position: relative;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        position: absolute;
        left: 50%;
        top: 50%;
        -webkit-transform: translate(-50%, -50%);
        -moz-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
        -o-transform: translate(-50%, -50%);
        transform: translate(-50%, -50%);
    }

    /*中部下半部*/
    .about_middle3 {
        background: url("../images/p_about10.jpg") no-repeat center/cover;
    }

    .about_middle3_dec {
        color: #c8c8c8;

    }

    .about_middle3_dec1 {
        position: relative;
    }

    .about_middle3_dec1 span {
        color: #b38549;
    }

    .about_middle3_dec2 {
        position: relative;
    }
}

@media (min-width: 1200px) {
    .about_top {
        height: 750px;
    }

    .about_top .about_top_dec .about_top_dec1 {
        font-size: 62px;
        line-height: 62px;
        margin: 130px 0 18px;
    }

    .about_top .about_top_dec .about_top_dec2 {
        font-size: 38px;
        line-height: 38px;
    }

    /*中部上半部*/
    .about_middle1 {
        height: 542px;
    }

    .about_middle1 .about_middle1_dec ul {
        margin-top: 60px;
        width: 580px;
    }

    .about_middle1 .about_middle1_dec li {
        margin-bottom: 75px;
    }

    .about_middle1 .about_middle1_dec li i {
        display: block;
        float: left;
    }

    .about_middle1 .about_middle1_dec li span {
        font-size: 18px;
        line-height: 27px;
        float: left;
        width: 430px;
        margin-top: 2px;
        margin-left: 35px;
    }

    .about_middle1 .about_middle1_dec li:nth-child(2) span {
        margin-top: 30px;
    }

    .about_middle1 .about_middle1_dec li:nth-child(3) span {
        margin-top: 15px;
    }

    /*中部中间部分*/
    .about_middle2 {
        background-color: rgb(31, 31, 31);
    }

    .about_middle2 .about_middle2_dec1 {
        margin: 50px 0;
    }

    .about_middle2 .about_middle2_dec2 {
        margin-top: 100px;
    }

    .about_middle2 .about_middle2_dec ul li {
        width: 50%;
        height: 300px;
    }

    .about_middle2 .about_middle2_dec ul li > img {
        height: 300px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {
        font-size: 18px;
        line-height: 27px;
        width: 550px;
        height: 270px;
        top: 50%;
        left: 50%;
        margin-left: -275px;
        margin-top: -135px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        width: 465px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text img {
        margin-top: 25px;
        width: 130px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_tborder {
        border: 2px solid #b38549;
    }

    /*中部下半部*/
    .about_middle3 {
        height: 576px;
    }

    .about_middle3_dec {
        font-size: 18px;
        line-height: 27px;
    }

    .about_middle3_dec1 {
        margin-top: 135px;
        width: 506px;
        left: 50%;
        margin-left: -253px;
    }

    .about_middle3_dec2 {
        margin: 125px 0 156px;
        width: 506px;
        left: 50%;
        margin-left: -253px;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .about_top {
        height: 675px;
    }

    .about_top .about_top_dec .about_top_dec1 {
        font-size: 56px;
        line-height: 56px;
        margin: 115px 0 16px;
    }

    .about_top .about_top_dec .about_top_dec2 {
        font-size: 34px;
        line-height: 34px;
    }

    /*中部上半部*/
    .about_middle1 {
        height: 490px;
    }

    .about_middle1 .about_middle1_dec ul {
        margin-top: 54px;
        width: 510px;
    }

    .about_middle1 .about_middle1_dec li {
        margin-bottom: 65px;
    }

    .about_middle1 .about_middle1_dec li img {
        width: 80px;
    }

    .about_middle1 .about_middle1_dec li i {
        display: block;
        float: left;
    }

    .about_middle1 .about_middle1_dec li span {
        font-size: 16px;
        line-height: 24px;
        float: left;
        width: 385px;
        margin-top: 6px;
        margin-left: 25px;
    }

    .about_middle1 .about_middle1_dec li:nth-child(2) span {
        margin-top: 28px;
    }

    .about_middle1 .about_middle1_dec li:nth-child(3) span {
        margin-top: 18px;
    }

    /*中部中间部分*/
    .about_middle2 .about_middle2_dec1 {
        margin: 45px 0;
    }

    .about_middle2 .about_middle2_dec2 {
        margin-top: 90px;
    }

    .about_middle2 .about_middle2_dec ul li {
        width: 50%;
        height: 270px;
    }

    .about_middle2 .about_middle2_dec ul li > img {
        height: 270px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {
        font-size: 16px;
        line-height: 26px;
        width: 450px;
        height: 250px;
        top: 50%;
        left: 50%;
        margin-left: -225px;
        margin-top: -125px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        width: 408px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text img {
        margin-top: 22px;
        width: 120px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_tborder {
        border: 2px solid #b38549;
    }

    /*中部下半部*/
    .about_middle3 {
        height: 518px;
    }

    .about_middle3_dec {
        font-size: 16px;
        line-height: 26px;
    }

    .about_middle3_dec1 {
        margin-top: 120px;
        width: 456px;
        left: 50%;
        margin-left: -228px;
    }

    .about_middle3_dec2 {
        margin: 100px 0 140px;
        width: 456px;
        left: 50%;
        margin-left: -228px;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .about_top {
        height: 600px;
    }

    .about_top .about_top_dec .about_top_dec1 {
        font-size: 50px;
        line-height: 50px;
        margin: 100px 0 14px;
    }

    .about_top .about_top_dec .about_top_dec2 {
        font-size: 30px;
        line-height: 30px;
    }

    /*中部上半部*/
    .about_middle1 {
        height: 435px;
    }

    .about_middle1 .about_middle1_dec ul {
        margin-top: 48px;
        width: 443px;
    }

    .about_middle1 .about_middle1_dec li {
        margin-bottom: 60px;
    }

    .about_middle1 .about_middle1_dec li img {
        width: 70px;
    }

    .about_middle1 .about_middle1_dec li i {
        display: block;
        float: left;
    }

    .about_middle1 .about_middle1_dec li span {
        font-size: 14px;
        line-height: 21px;
        float: left;
        width: 345px;
        margin-top: 3px;
        margin-left: 20px;
    }

    .about_middle1 .about_middle1_dec li:nth-child(2) span {
        margin-top: 25px;
    }

    .about_middle1 .about_middle1_dec li:nth-child(3) span {
        margin-top: 15px;
    }

    /*中部中间部分*/
    .about_middle2 .about_middle2_dec1 {
        margin: 40px 0;
    }

    .about_middle2 .about_middle2_dec2 {
        margin-top: 80px;
    }

    .about_middle2 .about_middle2_dec ul li {
        width: 50%;
        height: 220px;
    }

    .about_middle2 .about_middle2_dec ul li > img {
        height: 220px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {

        font-size: 14px;
        line-height: 24px;
        width: 345px;
        height: 200px;
        top: 50%;
        left: 50%;
        margin-left: -170px;
        margin-top: -100px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        width: 330px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text img {
        margin-top: 15px;
        width: 100px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_tborder {
        border: 2px solid #b38549;
    }

    /*中部下半部*/
    .about_middle3 {
        height: 450px;
    }

    .about_middle3_dec {
        font-size: 14px;
        line-height: 24px;
    }

    .about_middle3_dec1 {
        margin-top: 100px;
        width: 410px;
        left: 50%;
        margin-left: -205px;
    }

    .about_middle3_dec2 {
        margin: 90px 0 120px;
        width: 410px;
        left: 50%;
        margin-left: -205px;
    }
}

@media (max-width: 767px) {
    .about_top {
        background: url("../images/m_about1.jpg") no-repeat center/cover;
    }

    /*中部上半部*/
    .about_middle1 {
        background: url("../images/m_about2.png") no-repeat center/cover;
        text-align: center;
    }

    .about_middle1 .about_middle1_dec li span {
        display: block;
        color: #c8c8c8;
    }

    /*中部中间部分*/
    .about_middle2 {
        background-color: rgb(31, 31, 31);
        text-align: center;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {
        position: relative;
        text-align: left;
        color: #c8c8c8;
        overflow: hidden;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text1 {
        text-align: center;

    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        position: absolute;
        left: 50%;
        top: 50%;
        -webkit-transform: translate(-50%, -50%);
        -moz-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
        -o-transform: translate(-50%, -50%);
        transform: translate(-50%, -50%);
    }

    /*中部下半部*/
    .about_middle3 {
        background: url("../images/m_about10.jpg") no-repeat center/cover;
    }

    .about_middle3_dec {
        color: #c8c8c8;
    }

    .about_middle3_dec1 span {
        color: #b38549;
    }
}

@media (min-width: 480px) and (max-width: 767px ) {
    .about_top {
        height: 630px;
    }

    .about_top .about_top_dec .about_top_dec1 {
        font-size: 46px;
        line-height: 46px;
        margin: 140px 0 18px;
    }

    .about_top .about_top_dec .about_top_dec2 {
        font-size: 24px;
        line-height: 24px;
    }

    /*中部上半部*/
    .about_middle1 .about_middle1_dec ul {
        margin-top: 70px;
    }

    .about_middle1 .about_middle1_dec li img {
        margin-bottom: 40px;
    }

    .about_middle1 .about_middle1_dec li span {
        font-size: 16px;
        line-height: 24px;
        display: block;
        width: 325px;
        margin: 0 auto 60px;
    }

    /*中部中间部分*/
    .about_middle2 .about_middle2_dec1 {
        padding-bottom: 35px;
    }

    .about_middle2 .about_middle2_dec2 {
        margin-bottom: 45px;
    }

    .about_middle2 .about_middle2_dec ul li {
        margin-top: 35px;
    }

    .about_middle2 .about_middle2_dec ul li > img {
        width: 370px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {
        width: 380px;
        height: 190px;
        left: 50%;
        margin-left: -190px;
        font-size: 16px;
        line-height: 24px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text1 {
        height: 230px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        width: 350px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text a img {
        width: 120px;
        margin-top: 25px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_tborder {
        border: 2px solid #b38549;
    }

    /*中部下半部*/
    .about_middle3_dec {
        font-size: 16px;
        line-height: 24px;
    }

    .about_middle3_dec1 {
        margin-top: 80px;
        width: 380px;
        position: relative;
        left: 50%;
        margin-left: -185px;
    }

    .about_middle3_dec2 {
        margin: 80px 0 90px;
        width: 370px;
        position: relative;
        left: 50%;
        margin-left: -185px;
    }

}

@media (min-width: 360px) and (max-width: 479px ) {
    .about_top {
        height: 575px;
    }

    .about_top .about_top_dec .about_top_dec1 {
        font-size: 42px;
        line-height: 42px;
        margin: 130px 0 16px;
    }

    .about_top .about_top_dec .about_top_dec2 {
        font-size: 22px;
        line-height: 22px;

    }

    /*中部上半部*/
    .about_middle1 .about_middle1_dec ul {
        margin-top: 60px;
    }

    .about_middle1 .about_middle1_dec li img {
        margin-bottom: 35px;
    }

    .about_middle1 .about_middle1_dec li span {
        font-size: 14px;
        line-height: 21px;
        display: block;
        width: 290px;
        margin: 0 auto 55px;
    }

    /*中部中间部分*/
    .about_middle2 .about_middle2_dec1 {
        padding-bottom: 30px;
    }

    .about_middle2 .about_middle2_dec2 {
        margin-bottom: 40px;
    }

    .about_middle2 .about_middle2_dec ul li {
        margin-top: 30px;
    }

    .about_middle2 .about_middle2_dec ul li > img {
        width: 330px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {
        width: 340px;
        height: 160px;
        left: 50%;
        margin-left: -170px;
        font-size: 14px;
        line-height: 21px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text1 {
        height: 210px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        width: 315px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text a img {
        width: 100px;
        margin-top: 25px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_tborder {
        border: 2px solid #b38549;
    }

    /*中部下半部*/
    .about_middle3_dec {
        font-size: 14px;
        line-height: 21px;
    }

    .about_middle3_dec1 {
        margin-top: 75px;
        width: 340px;
        position: relative;
        left: 50%;
        margin-left: -165px;
    }

    .about_middle3_dec2 {
        margin: 70px 0 80px;
        width: 328px;
        position: relative;
        left: 50%;
        margin-left: -165px;
    }
}

@media (max-width: 359px ) {
    .about_top {
        height: 515px;
    }

    .about_top .about_top_dec .about_top_dec1 {
        font-size: 38px;
        line-height: 38px;
        margin: 120px 0 14px;
    }

    .about_top .about_top_dec .about_top_dec2 {
        font-size: 20px;
        line-height: 20px;
    }

    /*中部上半部*/
    .about_middle1 .about_middle1_dec ul {
        margin-top: 55px;
    }

    .about_middle1 .about_middle1_dec li img {
        margin-bottom: 30px;
        width: 80px;
    }

    .about_middle1 .about_middle1_dec li span {
        font-size: 12px;
        line-height: 18px;
        display: block;
        width: 250px;
        margin: 0 auto 50px;
    }

    /*中部中间部分*/
    .about_middle2 .about_middle2_dec1 {
        padding-bottom: 25px;
    }

    .about_middle2 .about_middle2_dec2 {
        margin-bottom: 35px;
    }

    .about_middle2 .about_middle2_dec ul li {
        margin-top: 26px;
    }

    .about_middle2 .about_middle2_dec ul li > img {
        width: 280px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text {
        width: 290px;
        height: 150px;
        left: 50%;
        margin-left: -145px;
        font-size: 12px;
        line-height: 18px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text1 {
        height: 180px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text > span {
        width: 270px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_text a img {
        width: 90px;
        margin-top: 20px;
    }

    .about_middle2 .about_middle2_dec ul li .about_middle2_dec1_tborder {
        border: 2px solid #b38549;
    }

    /*中部下半部*/
    .about_middle3_dec {
        font-size: 12px;
        line-height: 18px;
    }

    .about_middle3_dec1 {
        margin-top: 68px;
        width: 271px;
        position: relative;
        left: 50%;
        margin-left: -135px;
    }

    .about_middle3_dec1 span {
        color: #b38549;
    }

    .about_middle3_dec2 {
        margin: 65px 0 72px;
        width: 271px;
        position: relative;
        left: 50%;
        margin-left: -135px;
    }
}