@media (min-width:1921px) and (max-width: 2560px) {


    .index_banner .index_lunbo .flex-control-nav {
        position: absolute;
        width: 100%;
        height: 15px;
        text-align: center;
        z-index: 6;
        bottom: 5% !important;
    }

    .index-text,
    .case-detail-text {
        padding: 195px 0 80px !important;
        font-size: 32px !important;
    }

    .about-text {
        padding: 195px 0 0px !important;
        font-size: 32px !important;
    }

    .head-nav {
        width: 600px !important;
        top: 30px !important;
        position: absolute;
        right: 115px;
        height: 70px;
        line-height: 70px;
        display: none;
    }

    .head-nav li {
        float: left;
        font-size: 24px !important;
        margin-left: 65px;
    }

    .header-small {
        height: 130px !important;
    }

    .header .meun-off {
        float: right;
        /* margin-right: 10px; */
        margin-top: 5px;
    }

    .main-content .title,
    .slides .title {
        font-size: 30px !important;

    }

    .main-content .text,
    .slides .text {
        font-size: 16px !important;

    }

    .main-content .width2 {
        width: 49% !important;
    }

    .main-content .width3 {
        width: 32% !important;
    }


    .case-content ul li {
        height: 600px !important;
    }

    .nav {
        position: fixed;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        background: rgba(0, 0, 0, 0.9);
        display: none;
    }
}

@media screen and (max-width: 1920px) {
    .nav .close img {
        width: 42px;
    }

    .header-in .logo img {
        width: 185px;
        height: 60px;
    }

    .index-text,
    .case-detail-text {
        padding: 195px 0 80px;
    }

    .about-text {
        padding: 195px 0 0px;
    }

    .index-text p,
    .case-detail-text p {
        font-size: 24px;
    }

    .header-in .logo img .header-small {
        height: 40px;
    }

    .header-small .header-in {
        margin: 5px auto;
    }

    .main-content .width1 {
        width: 100%;
    }

    .main-content .width2 {
        width: 49%;
    }

    .main-content .width3 {
        width: 32%;
    }

    .head-nav {
        position: absolute;
        right: 115px;
        width: 455px;
        height: 70px;
        line-height: 70px;
        top: 0;
        display: none;
    }

    .head-nav li {
        float: left;
        margin-left: 54px;
    }

    .head-nav a {
        font-size: 16px;
        color: #000;
        /* font-family: "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif; */
        line-height: 30px;
    }

}


@media screen and (max-width: 1620px) {
    .head-nav {
        right: 120px;
        width: 350px;
    }

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

    .head-nav a {
        font-size: 14px;
    }

    .head-nav {
        right: 120px;
        width: 350px;
    }

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

    .head-nav a {
        font-size: 14px;
    }

    .index-text,
    .case-detail-text {
        padding: 120px 0 80px;
    }

    .about-text {
        padding: 195px 0 0px;
    }

    .index-text p,
    .case-detail-text p {
        font-size: 20px;
    }

    .main-content .width1 {
        width: 100%;
    }

    /* .main-content .width1 .img_content {
        height: 650px !important;
    } */

    .main-content .width2 {
        width: 49%;
    }

    /* .main-content .width2 .img_content {
        height: 450px !important;
    } */

    .main-content .width3 {
        width: 32%;
    }

    /* .main-content .width3 .img_content {
        height: 345px !important;
    } */

    .main-content .title,
    .slides .title {
        font-size: 20px !important;
        margin-top: 25px !important;
    }

    .main-content .text,
    .slides .text {
        margin-bottom: 40px !important;
        font-size: 14px !important;
    }

    .header .logo img {
        height: 45px;
        margin-top: 5px;
        width: 138px;
    }


    .case-list {
        margin-top: 120px !important;
    }

    .case-list ul li {
        width: 50% !important;
    }

    /* .case-content .case-summary .sy1 {
        font-size: 18px !important;
    } */
}

@media screen and (max-width:1440px) {

    /* .index_banner .index_lunbo .flex-control-nav {
        top: 73% !important;
    } */
}

@media screen and (max-width: 1390px) {
    .head-nav {
        right: 100px;
        width: 330px;
    }

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

    .head-nav a {
        font-size: 12px;
    }
}

@media screen and (max-width: 1280px) {

    .contract-content .left .top,
    .contract-content .left .middle {
        margin-bottom: 20px !important;
    }

    .contract-content .left .bottom {
        padding-bottom: 20px !important;
    }

    /* .index_banner .index_lunbo .flex-control-nav {
        top: 70% !important;
    } */
}

@media screen and (max-width: 1200px) {
    .head-nav {
        display: none !important;
    }
}

@media screen and (max-width: 1200px) {
    /* .index_banner .index_lunbo .flex-control-nav {
        top: 65% !important;
    } */
}

@media screen and (max-width: 750px) {
    .header .logo img {
        height: 30px;
        margin-top: 5px;
        width: 92px;
    }

    .index-text {
        width: 94%;
        margin: 0 auto;
        padding: 100px 0 40px;
    }

    .index-text p {
        font-size: 16px;
    }

    .case-list {
        margin-top: 90px !important;
    }

    .case-list ul li {
        width: 100% !important;
    }

    .header-in {
        height: 40px !important;
        line-height: 40px;
    }

    .header-small {
        height: 50px !important;
    }

    .head-nav {
        display: none !important;
    }

    /* .header .meun-off {
        margin-top: 5px !important;
    } */

    .contract-content {
        padding-top: 90px !important;
    }

    .contract-content .left {
        width: 100% !important;
    }

    .contract-content .left .top,
    .contract-content .left .middle {
        margin-bottom: 80px !important;
    }

    .contract-content .left .bottom {
        padding-bottom: 40px !important;
    }

    .contract-content .right {
        display: none;
    }

    .main-content .width1,
    .main-content .width2,
    .main-content .width3 {
        width: 100%;
    }

    .main-content .title,
    .slides .title {
        font-size: 16px !important;
        margin-top: 15px !important;
    }

    .main-content .text,
    .slides .text {
        margin-bottom: 30px !important;
        font-size: 12px !important;
    }

    .case-detail-text {
        padding: 100px 0 40px !important;
    }

    .case-detail-text .p1 {
        margin-bottom: 30px !important;
        font-size: 18px !important;
    }

    /* .index_banner .index_lunbo .flex-control-nav {
        bottom: 5% !important;
    } */

    .main-content .width1 .img_content,
    .main-content .width2 .img_content,
    .main-content .width3 .img_content,
    .index_banner .index_lunbo .slides li img {
        height: auto !important;
        width: 100% !important;
    }

    .more {
        margin: 40px auto 60px !important;
    }

}



.header .logo {
    float: left;
    /* margin-left: 10px; */
}


.header-in .logo img {
    transition: all .3s ease;
}

.head-block {
    display: block;
}

.header {
    height: 100px;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99;
    transition: all .3s ease;
}

.header-small {
    height: 70px;
    background: #fff;
    box-shadow: rgba(0, 0, 0, .1) 0 1px 5px;
    transition: all .3s ease;
}

.header-in {
    width: 90%;
    margin: 35px auto;
    height: 70px;
    transition: all .3s ease;
}


.head-in .logo img {
    transition: all .3s ease;
}


.header .meun-off {
    float: right;
    /* margin-right: 10px; */
    /* margin-top: 15px; */
    margin-top: 5px;
}

.header .meun-off span {
    width: 41px;
    height: 2px;
    background-color: #666;
    display: block;
    margin: 12px auto;
    -webkit-transition: all .3s ease-in-out;
    -o-transition: all .3s ease-in-out;
    transition: all .3s ease-in-out;
}

.nav {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.9);
    display: none;
}

.nav ul {
    margin: 0 auto;
    width: 50%;
    text-align: center;
    height: 500px;
    position: absolute;
    top: 50%;
    margin-top: -250px;
    left: 50%;
    margin-left: -25%;
}

.nav ul li {
    -webkit-animation: fadeIn .8s .3s ease both;
    -ms-animation: fadeIn .8s .3s ease both;
    -moz-animation: fadeIn .8s .3s ease both;
    animation: fadeIn .8s .3s ease both;
}

.nav ul a {
    display: block;
    height: 80px;
    overflow: hidden;
    margin: 10px 0;
}

.nav ul span {
    display: block;
    font-size: 48px;
    line-height: 80px;
    text-transform: uppercase;
    color: #e9e7e8;
    transition: all .3s;
}

.nav .nav-tel {
    position: absolute;
    left: 2%;
    bottom: 2%;
}

.nav .close {
    display: block;
    position: absolute;
    top: 4%;
    right: 4%;
}

.nav .close img {
    transition: all .5s ease;
}

.nav .close:hover img {
    transform: rotate(90deg)
}


.index-text {
    margin: 0 auto;
    position: relative;
    z-index: 9;
    background-color: #fff;
    box-sizing: border-box;
    width: 84.5%;
    font-weight: 350;
}

.case-detail-text {
    margin: 0 auto;
    position: relative;
    z-index: 9;
    background-color: #fff;
    box-sizing: border-box;
    width: 70%;
    font-weight: 350;
}

.index-text p {
    margin-bottom: 20px;
    color: #777;
    /* font-weight: lighter; */
}

.case-detail-text .p1 {
    font-weight: normal;
    font-size: 20px;
    margin-bottom: 60px;
}

.case-detail-text .p2,
.case-detail-text .p3,
.case-detail-text .p4,
.case-detail-text .p5 {
    font-size: 14px;
    margin-bottom: 17px;
    color: #777;
    /* font-weight: lighter; */
}

.case-detail-text .small-text p {
    font-size: 14px;
    margin-bottom: 17px;
    color: #777;
    line-height: 2;
}

.small-text {
    width: 100%;
}

.small-text img {
    width: 100%;
    vertical-align: top;
}

/* .index-text .p1{
    animation: bounceInLeft .5s .3s ease both;
}

.index-text .p2,
.case-detail-text .p2 {
    animation: bounceInLeft .8s .3s ease both;
}

.index-text .p3,
.case-detail-text .p3 {
    animation: bounceInLeft 1s .3s ease both;
}

.index-text .p4,
.case-detail-text .p4 {
    animation: bounceInLeft 1.2s .3s ease both;
}

.case-detail-text .p5 {
    animation: bounceInLeft 1.4s .3s ease both;
} */

.clear:after {
    visibility: hidden;
    display: block;
    font-size: 0;
    content: " ";
    clear: both;
    height: 0;
}

.footer {
    background: #333;
    padding: 75px 0;
    position: relative;
    z-index: 10;
}

.footer-in {
    width: 1180px;
    margin: 0 auto;
    color: #b2b2b2;
    font-weight: 300;
    font-family: "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif;
}


.footer-in .one {
    margin-right: 95px;
    margin-top: 4px;
}

.footer-in .two,
.footer-in .three {
    margin-right: 64px;
    width: 256px;
}

.footer-in .four {
    width: 300px;
}

.footer-in .one .img1 {
    width: 60px;
    /* height: 60px; */
    margin-right: 15px;
}

.footer-in .one .img2 {
    /* width: 42px; */
}

.footer-in .text {
    font-size: 14px;
    margin-bottom: 4px;
    width: 100%;
    line-height: 1.5;
    opacity: 0.8;
    /* font-weight: bold; */
}

.bottom_img {
    height: 706px;
    width: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-image: url(../images/images10.png);
    background-attachment: fixed;
}

.index_bottom_img {
    height: 706px;
    width: 100%;
    vertical-align: bottom;
    object-fit: cover;
}



.about_bottom_img {
    height: 796px;
    width: 95%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-image: url(../images/about.png);
    background-attachment: fixed;
    margin: 100px auto 72px;
}

.about_bottom_img2 {
    height: 796px;
    width: 90%;
    margin: 100px auto 72px;
}

.about_bottom_img2 img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text {}

.wrap2 {
    width: 90%;
    margin: 0 auto;
    position: relative;
    background-color: #fff;
    z-index: 10;
}

.main-content {}

.main-content li {
    display: flex;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.main-content li .width1 .img_content {
    height: 722px;
    overflow: hidden;
    text-align: center;
}

.main-content li .width2 .img_content {
    height: 617px;
    overflow: hidden;
    text-align: center;
}

.main-content li .width3 .img_content {
    height: 414px;
    overflow: hidden;
    text-align: center;
}

.tran {
    transition: all .3s ease;
}

.main-content img {
    width: 100%;
    height: 100%;
    transition: all .3s;
}

.main-content img:hover {
    transform: scale(1.1);
}


.main-content .title,
.slides .title {
    font-size: 24px;
    /* font-weight: lighter; */
    /* color: #777; */
    margin-top: 30px;
}

.main-content .text,
.slides .text {
    margin-bottom: 67px;
    /*color: #666;*/
    font-size: 14px;
    color: #777;
    /* font-weight: lighter; */
    margin-top: 13px;
    height: 48px;
    line-height: 24px;
    overflow: hidden;
}

.more {
    border: 1px solid #666;
    text-align: center;
    width: 180px;
    height: 45px;
    line-height: 45px;
    color: #666;
    font-size: 14px;
    margin: 60px auto 165px;
    cursor: pointer;
}

/* .index_bottom_content {
    position: relative;
}

.gray_bj {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
} */

.more:hover {
    color: #333;
}

.more {
    text-align: center;
    transition: all .5s ease-in;
}

.more a {
    width: 100%;
    height: 100%;
    display: inline-block;
}

.more:hover i {
    color: #333;
    text-indent: 10px;
    display: inline-block;
}

.more i {
    width: 8px;
    height: 8px;
    border-left: 1px solid #333;
    border-top: 1px solid #333;
    transform: rotate(135deg);
    text-indent: -10px;
    line-height: 50px;
    transition: all ease-out .5s;
    color: #fff;
    display: none;
}

.more a {
    width: 100%;
    height: 100%;
    display: inline-block;
}

.case-list {
    width: 90%;
    margin: 150px auto 0;
}

.case-content {
    /* padding-bottom: 150px; */
}

.case-content ul li {
    width: 33.333333%;
    float: left;
    position: relative;
    overflow: hidden;
    display: block;
    height: 428px;
}

/* .case-list ul li:nth-child(2n+1),
.main-content li a:nth-child(2n+1) {
    -webkit-animation: bounceInLeft .8s .3s ease both;
    -ms-animation: bounceInLeft .8s .3s ease both;
    -moz-animation: bounceInLeft .8s .3s ease both;
    animation: bounceInLeft .8s .3s ease both;
}

.case-list ul li:nth-child(2n),
.main-content li a:nth-child(2n) {
    -webkit-animation: bounceInRight .8s .3s ease both;
    -ms-animation: bounceInRight .8s .3s ease both;
    -moz-animation: bounceInRight .8s .3s ease both;
    animation: bounceInRight .8s .3s ease both;
} */

.case-content ul li img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.case-content .case-summary {
    display: none;
    width: 90%;
    height: 90%;
    background: rgba(0, 0, 0, .5);
    top: 0;
    left: 0;
    position: absolute;
    padding: 5%;
}

.case-content .case-summary p {
    color: #f9f9f9;
    position: absolute;
    left: 0;
    font-size: 20px;
}

.case-content .case-summary .p2 {
    bottom: 0;
    font-size: 14px;
    width: 100%;
}

/*.case-content .case-summary .p2 span{*/
/*font-size: 18px;*/
/*}*/

.case-content .case-summary .sy1 {
    font-size: 20px;
    display: block;
    width: 100%;
}

.case-content .case-summary .sy2 {
    width: 100%;
    /*display: block;*/
    display: block;
    height: 48px;
    line-height: 24px;
    overflow: hidden;
    font-size: 14px;
}

.case-detail-img {
    width: 76.5%;
    margin: 0 auto;
}

.case-detail-img img {
    width: 100%;
    margin-bottom: 10px;
}

.contract-content {
    padding-top: 195px;
    width: 90%;
    margin: 0 auto;
    position: relative;
    overflow: visible;
}

.contract-content .left {
    width: 32%;
    margin-left: 4%;
}

.contract-content .left .top {
    font-size: 16px;
    /* font-weight: lighter; */
    /*font-weight: #777;*/
    margin-bottom: 133px;
    line-height: 32px;
    /* -webkit-animation: lightSpeedIn .8s .3s ease both;
    -ms-animation: lightSpeedIn .8s .3s ease both;
    -moz-animation: lightSpeedIn .8s .3s ease both;
    animation: lightSpeedIn .8s .3s ease both; */
}

.contract-content .left .middle {
    margin-bottom: 129px;
    /* -webkit-animation: lightSpeedIn .8s .6s ease both;
    -ms-animation: lightSpeedIn .8s .6s ease both;
    -moz-animation: lightSpeedIn .8s .6s ease both;
    animation: lightSpeedIn .8s .6s ease both; */
}

.contract-content .left .middle h3 {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 25px;
}

.contract-content .left .middle p {
    font-size: 14px;
    font-weight: normal;
    margin-bottom: 15px;
}

.contract-content .left .bottom {
    padding-bottom: 180px;
    /* -webkit-animation: lightSpeedIn .8s .9s ease both;
    -ms-animation: lightSpeedIn .8s .9s ease both;
    -moz-animation: lightSpeedIn .8s .9s ease both;
    animation: lightSpeedIn .8s .9s ease both; */
}

.contract-content .left .bottom p {
    margin-bottom: 10px;
}

.contract-content .right {
    position: absolute;
    right: -6%;
    top: 25%;
}


.contract-content .right img {
    height: 740px;
    width: 1240px;
}

/*首页banner*/
.index_banner {
    width: 100%;
    position: relative;
    overflow: hidden;
    margin-bottom: 100px;
}

.index_banner .index_lunbo {
    width: 90%;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
}

.index_banner .index_lunbo .slides {
    width: 100%;
    /* text-align-last: center; */
}

/*.index_banner .index_lunbo .slides li {*/
/*text-align: center;*/
/*}*/

.index_banner .slides_img_content {
    text-align: center;
}

.index_banner .index_lunbo .slides li img {
    width: 100%;
    height: 780px;
}

.index_banner .index_lunbo .flex-control-nav {
    position: absolute;
    width: 100%;
    height: 15px;
    text-align: center;
    z-index: 6;
    bottom: 5%;
}

.index_banner .index_lunbo .flex-control-nav li {
    display: inline-block;
    margin: 0 10px;
}

.index_banner .index_lunbo .flex-control-nav li a {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fff;
    transition: all .3s;
    text-indent: -9999px;
}

.index_banner .index_lunbo .flex-control-nav li:hover {
    cursor: pointer;
}

.index_banner .index_lunbo .flex-control-nav li .flex-active {
    /* width: 30px; */
    background: #ff0;
}

/* .index_banner .index_lunbo .slides li .lunboTwrap {
    width: 1200px;
    height: 150px;
    position: absolute;
    left: 50%;
    bottom: 362px;
    margin-left: -600px;
    z-index: 9;
} */

/* .index_banner .index_lunbo .flex-direction-nav .flex-prev::before {
    left: 0;
    bottom: 0;
    -webkit-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    transform: rotate(-45deg);
    -webkit-transform-origin: left;
    -ms-transform-origin: left;
    transform-origin: left;
}

.index_banner .index_lunbo .flex-direction-nav .flex-next:before {
    left: 0;
    bottom: 0;
    -webkit-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    transform: rotate(-45deg);
    -webkit-transform-origin: left;
    -ms-transform-origin: left;
    transform-origin: left;
}

.index_banner .index_lunbo .flex-direction-nav a {
    left: 50%;
    margin-left: -10px;
}


.index_banner .index_lunbo .flex-direction-nav .flex-next {
    right: 2.1%;
}

.index_banner .index_lunbo .flex-direction-nav .flex-prev {
    position: absolute;
    top: 25%;
    margin-top: 0;
    width: 100px;
    height: 50%;
    padding: 0;
    cursor: pointer;
}

.index_banner .index_lunbo .flex-direction-nav a,
.index_banner .index_lunbo .flex-direction-nav a::after,
.index_banner .index_lunbo .flex-direction-nav a::before {
    position: absolute;
    top: 50%;
    height: 2px;
    background: #fff;
    border-radius: 1px;
    backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transition: all .4s ease;
} */

.arrow {
    width: 100%;
    margin: 16px auto 165px;
    text-align: center;
}

.arrow img {
    width: 31px;
    height: 17px;
}

.case-more {
    margin-bottom: 0 !important;
    margin-top: 105px;
}

.index {
    position: relative;
    /*padding-bottom: 255px;*/
}


.main-content li:nth-child(2) {
    display: block;
    /*text-align: center;*/
}

.go-up {
    position: fixed;
    right: 5%;
    bottom: 5%;
    z-index: 999;
    margin-right: 46px;
}

.go-up img {
    width: 45px;
    height: 45px;
}