.head{
    position: fixed;
    top:0;
    width:100%;
    height: 90px;
    background-color: #fff;
    z-index: 99;
}
.nav{
    width:1200px;
    padding-top:20px;
    margin: auto;
}
.nav_logo{
    width:251px;
    height:50px;
}
.nav_logo img{
    width:100%;
}
.nav_ul li{
    float: left;
    margin-top:5px;
}
.nav_ul li a{
    display: block;
    font-size:22px;
    font-family: "SimSun";
    padding:10px 20px;
    color: #333;
    line-height: 1;
    margin: 0 5px;
}
.nav_ul li a:hover{
    border-bottom: 1px solid #bd2a2f;
    color:#bd2a2f;
}
.nav_ul li a.on{
    border-bottom: 1px solid #bd2a2f;
    color:#bd2a2f;
}
.nav_menu{
    position: absolute;
    top:0;
    left:0;
    width:100%;
    height:75px;
    display: none;
}
.nav_menu_btn{
    width: 100%;
    height:100%;
    background: url("../images/nav.png") no-repeat;
    background-position: right center;
    -webkit-background-size:65px auto;
    background-size:65px auto;
}
.nav_menu_ul{
    width:100%;
    display: none;
}
.nav_menu_ul li{
    width:100%;
    margin-bottom: 2px;
    background-color: rgba(0,0,0,.7);
}
.nav_menu_ul li a{
    color: #fff;
    font-size:18px;
    font-family: "SimSun";
    line-height: 44px;
    text-indent: 30px;
}
@media screen and (max-width: 1200px){
    .nav{
        width:94%;
    }
}
@media screen and (max-width: 1024px){
    .head{
        height: 80px;
    }
    .nav{
        padding-top:15px;
    }
    .nav_ul{
        display: none;
    }
    .nav_menu{
        display: block;
    }
    .nav_logo{
        width:180px;
        margin-top: 6px;
    }
}
@media screen and (max-width: 768px){
    .head{
        height: 60px;
    }
    .nav{
        padding-top:8px;
    }
    .nav_menu{
        height:60px;
        -webkit-background-size:55px auto;
        background-size:55px auto;
    }
    .nav_logo{
        width:120px;
        height:auto;
        margin-top: 11px;
    }
}

.main{
    width: 100%;
    padding-top:90px;
}
.main_banner{
    overflow: hidden;
    position: relative;
    width:100%;
}
.main_banner_ul{
    width:500%;
}
.main_banner_ul li{
    overflow: hidden;
    float:left;
    width:20%;
    background-color: #000;
}
.main_banner_ul li img{
    width:100%;
    height: auto;
}
.main_banner_tab{
    position: absolute;
    left:50%;
    bottom:20px;
    width:280px;
    margin-left:-105px;
}
.main_banner_tab li{
    float: left;
    width:60px;
    height: 6px;
    margin:0 5px;
    background-color: #fff;
}
.main_banner_tab li.on{
    background-color: #7c1214;
}
.main_banner_btn{
    position: absolute;
    left:50%;
    top:50%;
    width:90%;
    height: 76px;
    margin-top:-38px;
    margin-left: -45%;
    display: none;
}
.main_banner_btn img{
    height:100%;
}
.main_banner:hover .main_banner_btn{
    display: block;
}
.main_cont{
    width:1200px;
    margin:30px auto;
}
.main_cont_ul{
    overflow: hidden;
    width:100%;
}
.main_cont_ul li{
    float: left;
    width:270px;
    height:305px;
}
.main_cont_ul_li1{
    background: url("../images/index_1.png") no-repeat;
    background-position: center 45px;
    -webkit-background-size:auto;
    background-size:auto;
    background-color: #ed7122;
}
.main_cont_ul_li2{
    background: url("../images/index_2.png") no-repeat;
    background-position: center 45px;
    -webkit-background-size:auto;
    background-size:auto;
    background-color: #62c1b5;
    margin-left: 40px;
}
.main_cont_ul_li3{
    background: url("../images/index_3.png") no-repeat;
    background-position: center 45px;
    -webkit-background-size:auto;
    background-size:auto;
    background-color: #8b74ce;
    margin-left: 40px;
}
.main_cont_ul_li4{
    background: url("../images/index_4.png") no-repeat;
    background-position: center 45px;
    -webkit-background-size:auto;
    background-size:auto;
    background-color: #03a6d4;
    margin-left: 40px;
}
.main_cont_ul_li_text{
    margin: 190px auto 0;
    text-align: center;
    font-size: 14px;
    color: #fff;
    line-height: 15px;
    width: 90%;
}
.main_cont_ul_li_text span{
    font-size:24px;
    line-height: 2;
}
.foot{
    width:100%;
    line-height:70px;
    color: #aaa;
    text-align: center;
    background-color: #f2f2f2;
}
@media screen and (max-width: 1200px){
   .main{
        padding-top:80px;
    }
    /*.main_banner_ul li{
        height: 460px;
    }*/
    /*.main_banner_ul li img{*/
        /*!*position: absolute;*/
        /*top:0;*/
        /*left: 50%;*/
        /*display: block;*/
        /*width: auto;*/
        /*height: 100%;*/
        /*margin-left: -70%;*!*/
    /*}*/
    .main_cont{
        width:100%;
        margin: 30px auto 10px;
    }
    .main_cont_ul{
        width:620px;
        margin: auto;
    }
    .main_cont_ul li{
        margin: 0 20px 20px;
    }
}
@media screen and (max-width: 1024px){
    /*.main_banner_ul li{
        height: 400px;
    }*/
}
@media screen and (max-width: 768px){
    /*.main_banner_ul li{
        height: 300px;
    }*/
    .main{
        padding-top:60px;
    }
    .main_banner_tab{
        width:160px;
        margin-left:-60px;
    }
    .main_banner_tab li{
        width:30px;
        height: 3px;
    }
    .foot{
        line-height:60px;
        font-size:12px;
    }
}
@media screen and (max-width: 620px){
    /*.main_banner_ul li{
        height: 220px;
    }*/
    .main_cont_ul{
        width:440px;
    }
    .main_cont_ul li{
        width:200px;
        height:230px;
        margin: 0 10px 20px;
    }
    .main_cont_ul_li1{
        -webkit-background-size:auto 70px;
        background-size:auto 70px;
    }
    .main_cont_ul_li2{
        -webkit-background-size:auto 70px;
        background-size:auto 70px;
    }
    .main_cont_ul_li3{
        -webkit-background-size:auto 70px;
        background-size:auto 70px;
    }
    .main_cont_ul_li4{
        -webkit-background-size:auto 60px;
        background-size:auto 60px;
    }
    /*.main_banner_ul li img{
        margin-left: -50%;
    }*/
    .main_cont_ul_li_text{
        margin-top:160px;
        font-size: 12px;
    }
    .main_cont_ul_li_text span{
        font-size:20px;
        line-height: 1;
    }
}
@media screen and (max-width: 440px){
    /*.main_banner_ul li{
        height: 190px;
    }*/
    .foot{
        line-height:50px;
    }
    .main_cont_ul{
        width:320px;
    }
    .main_cont_ul li{
        width:150px;
        height:180px;
        margin: 0 5px 10px;
        background-position: center 30px;
    }
    .main_cont_ul_li1{
        -webkit-background-size:auto 50px;
        background-size:auto 50px;
    }
    .main_cont_ul_li2{
        -webkit-background-size:auto 50px;
        background-size:auto 50px;
    }
    .main_cont_ul_li3{
        -webkit-background-size:auto 50px;
        background-size:auto 50px;
    }
    .main_cont_ul_li4{
        -webkit-background-size:auto 40px;
        background-size:auto 40px;
    }
    .main_cont_ul_li_text{
        margin-top:105px;
    }

}
@media screen and (max-width: 360px){
    /*.main_banner_ul li img{
        margin-left: -70%;
    }*/
}



.rendering_banner_ul{
    width:100%;
    height: 600px;
    border-bottom:4px solid #03a6d4;
}
.rendering_banner_ul_img{
    overflow: hidden;
    position: relative;
    width: 100%;
    height: 100%;
    background-color: #000;
}
.rendering_banner_ul_img img{
    margin: auto;
}
.banner_suo{
    position: fixed;
    bottom: 70px;
    left:0;
    width:100%;
    height:130px;
    margin: 35px auto;
}
.sanjiao{
    position: absolute;
    left:195px;
    top: -35px;
    width:26px;
    height:15px;
    display:none;
}
.banner_suo_btn{
    position: absolute;
    top:0;
    left:0;
    width:auto;
    height:100%;
}
.banner_suo_btn1{
    left:auto;
    right: 0;
}
.banner_suo_btn img{
    height:100%;
    cursor: pointer;
}


.banner_suo_div{
    position: absolute;
    left:50%;
    top:0;
    overflow: hidden;
    width: 1750px;
    height:100%;
    margin-left:-882px;
}
.banner_suo_ul{
    overflow: hidden;
    width:5000%;
    height:100%;
}
.banner_suo_ul li{
    overflow: hidden;
    float: left;
    width:220px;
    height: 100%;
    padding: 0 15px;

}
.suo_div_img{
    width:100%;
    height:100%;
    background-color: #fafafa;
}
.banner_suo_ul li img{
    height:100%;
    width:auto;
    margin: auto;
}
.render_foot{
    position: fixed;
    left:0;
    bottom: 0;
}

@media screen and (max-width: 1750px){
    .banner_suo_div{
        width: 1500px;
        margin-left:-750px;
    }
}
@media screen and (max-width: 1600px){
    .banner_suo_div{
        width: 1250px;
        margin-left:-625px;
    }
}
@media screen and (max-width: 1400px){
    .sanjiao{
        left:13%;
    }
}
@media screen and (max-width: 1350px){
    .banner_suo_div{
        width: 1050px;
        margin-left:-525px;
    }
    .banner_suo_ul li{
        width:200px;
        padding: 0 5px;
    }
}
@media screen and (max-width: 1170px){
    .banner_suo_div{
        width: 900px;
        margin-left:-450px;
    }
    .banner_suo_ul li{
        width:170px;
    }
}
@media screen and (max-width: 1025px){
    .banner_suo_div{
        width:720px;
        margin-left:-360px;
    }
}

/*@media screen and (max-width: 1200px){
    .sanjiao{
        top:-51px;
        left:15%;
    }
}
@media screen and (max-width: 1200px){
    .sanjiao{
        top:-35px;
        left:16%;
    }
}*/
@media screen and (max-width: 768px){
    .banner_suo_ul{
        width:8000%;
    }
    .banner_suo_div{
        width:540px;
        margin-left:-270px;
    }
    .banner_suo{
        bottom: 50px;
        height:100px;
    }
    .sanjiao{
        top:-45px;
        left:18%;
    }
}
@media screen and (max-width: 620px){
    .banner_suo_div{
        width:416px;
        margin-left:-208px;
    }
    .banner_suo_ul li{
        width:100px;
        padding:0 2px;
    }
}
@media screen and (max-width: 530px){
    .banner_suo_div{
        width:300px;
        margin-left:-150px;
    }
}
@media screen and (max-width: 420px){
    .banner_suo{
        height:80px;
    }
    .sanjiao{
        top:-35px;
        left:24%;
    }
}
@media screen and (max-width: 375px){
    .sanjiao{
        left:18%;
    }
    .banner_suo_div{
        width:208px;
        margin-left:-111px;
    }
}



.about,.contact{
    width: 100%;
    background: url("../images/about_bg.jpg") no-repeat;
    background-position:left top;
    -webkit-background-size:100% 100%;
    background-size:100% 100%;
}
.about_cont,.contact_cont{
    width:1200px;
    margin:auto;
    font-family: "Arial Narrow";
}
.about_cont_div{
    width:100%;
    padding:50px 0;
}
.about_bg{
    width:100%;
    background-color: rgba(255,255,255,.3);
}
.about_text{
    width:1023px;
    padding:60px 0 40px;
    margin-left:70px;
}
.about_text h3{
    font-size:30px;
    color:#fff;
    text-transform: uppercase;
}
.about_text3{
    position: relative;
    width:100%;
    padding-top:20px;
}
.about_text h4{
    font-size:22px;
    color:#fff;
    text-transform: uppercase;
    margin-top:20px;
}
.about_text p{
    font-size:16px;
    color:#fff;
    line-height:30px;
    margin-top:15px;
}
.h3_1{
    margin-top:60px;
}
.about_img{
    position: absolute;
    bottom:0;
    right: -40px;
    width:448px;
    height:300px;
}
.about_img img{
    width:100%;
}

.contact_cont_div{
    width:1080px;
    margin: auto;padding: 60px 0 40px;
}
.contact_left{
    width:530px;
}
.contact_left_text h3{
    font-size: 36px;
    color:#fff;
    font-weight: 400;
    text-transform: uppercase;
}
.contact_left_text p{
    font-size: 14px;
    color:#fff;
    line-height:30px;
    margin-top: 15px;
}

.contact_left_img{
    width:400px;
    margin-top: 15px;
}
.contact_left_img img{
    width:100%;
}
.contact_right{
    width:530px;
    height:510px;
    margin-top: 35px;
}
.contact_map{
    width:100%;
    height:100%;
}
#dituContent{
    width:100%;
    height:100%;
}
@media screen and (max-width: 1200px){
    .about_cont,.contact_cont{
        width:100%;
    }
    .about_bg{
        width:96%;
        margin: auto;
    }
    .contact_left{
        overflow: hidden;
        float: none;
        width: 96%;
        margin: auto;
    }
    .about_text{

        width:90%;
        margin: auto;
    }
    .about_img{
        right: 0;
        bottom: -20px;
    }
    .contact_left_text{
        float: left;
        width:48%;
    }
    .contact_left_img{
        overflow: hidden;
        float:right;
        width:48%;
        height:200px;
        margin-top: 0;
    }
    .contact_right{
        float: none;
        width:96%;
        height:300px;
        margin: 35px auto 0;
    }
}
@media screen and (max-width: 1080px){
    .contact_cont_div{
        width:100%;
        padding:40px 0 40px;
    }
}
@media screen and (max-width: 1024px){
    .about_img{
        width:350px;
        height:auto;
    }
}
@media screen and (max-width: 768px){
    .about_text{
        padding-top:40px;
    }
    .about_img{
        position: static;
        width:100%;
    }
    .h3_1{
        margin-top:40px;
    }
    .contact_cont{
        padding-top:40px;
    }
    .about,.contact{
        padding-bottom: 80px;
    }
}
@media screen and (max-width: 500px){
    .about_text{
        padding-top:30px;
    }
    .h3_1{
        margin-top:30px;
    }
    .about_text h3{
        font-size:22px;
    }
    .about_text p{
        font-size:14px;
        line-height:20px;
        margin-top:10px;
    }
    .about_text h4{
        font-size:18px;
        margin-top:10px;
    }
    .about_text3{
        padding-top:0;
    }
    .contact_left_text h3{
        font-size: 24px;
    }
    .contact_left_text p{
        font-size: 14px;
        line-height:24px;
    }
    .contact_left_text{
        float: none;
        width:100%;
    }
    .contact_left_img{
        float: none;
        width:100%;
        height:150px;
        margin: 15px auto 0;
    }
    .contact_right{
        float: none;
        width:96%;
        height:200px;
        margin: 20px auto 0;
        padding-bottom: 100px;
    }
}

.main_video{
    position: relative;
    width:100%;
}
.a_video_ul{
    position: relative;
    width:100%;
    height:100%;
}
.a_video_ul_div{
    overflow: hidden;
    position: absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background-color: #000;
}
#video{
    width:100%;
    height: 100%;
    margin: auto;
}
.main_video_cb{

    width:100%;
    height: 130px;
    padding:20px 0;
}
.main_video_cb_cent{
    position: relative;
    width:100%;
    height:100%;
}
.main_video_cb_div{
    position: relative;
    overflow: hidden;
    width:1680px;
    margin: auto;
    z-index: 2;
}
.main_video_cb_ul{
    width:200%;
}
.main_video_cb_btn{
    position: absolute;
    top:50%;
    width:100%;
    height:130px;
    margin-top: -65px;
    z-index: 1;
}
.main_video_cb_btn img{
    height: 100%;
    width: auto;
}
.main_video_cb_ul li{
    float: left;
    overflow: hidden;
    position: relative;
    width:242px;
    height:122px;
    margin:0 15px;
    border:4px solid transparent;
}
.main_video_cb_ul li.on{
    border:4px solid #7c1214;
}
.video_img{
    position: absolute;
    top:0;
    left:0;
    width:100%;
    height: 100%;
}

@media screen and (max-width: 1750px){
    .main_video_cb_div{
        width:1320px;
    }
    .main_video_cb_ul li{
        width:192px;
        margin:0 10px;
    }
}
@media screen and (max-width: 1450px){
    .main_video_cb_div{
        width:1140px;
    }
    .main_video_cb_ul li{
        width:172px;
        margin:0 5px;
    }
}
@media screen and (max-width: 1260px){
    .main_video_cb{
        height: 100px;
    }
    .main_video_cb_btn{
        height:100px;
        margin-top: -50px;
    }
    .main_video_cb_div{
        width: 900px;
    }
    .main_video_cb_ul li{
        width:132px;
        height:92px;
    }
}
@media screen and (max-width: 990px){
    .main_video_cb{
        height: 70px;
    }
    .main_video_cb_btn{
        height:70px;
        margin-top: -35px;
    }
    .main_video_cb_div{
        width:720px;
    }
    .main_video_cb_ul li{
        width:110px;
        margin: 0 3px;
        height:66px;
        border:2px solid transparent;
    }
    .main_video_cb_ul li.on{
        border:2px solid #7c1214;
    }
}
@media screen and (max-width: 780px){
    .main_video_cb_div{
        width:600px;
    }

}
@media screen and (max-width: 660px){
    .main_video_cb_div{
        width:480px;
    }
}
@media screen and (max-width: 550px){
    .main_video_cb{
        height: 50px;
    }
    .main_video_cb_btn{
        height:50px;
        margin-top: -25px;
    }
    .main_video_cb_div{
        width:360px;
    }
    .main_video_cb_ul li{
        width:80px;
        height:46px;
    }
}
@media screen and (max-width: 420px){
    .main_video_cb_div{
        width:270px;
    }
    .main_video_cb_ul{
        width:300%;
    }
}


.arvr_top{
    width:100%;
    /*max-width: 1920px;*/
    height:400px;
    background-color: #000;
    position: relative;
    margin: auto;

}
.arvr_top_banner{
    width:100%;
    position: absolute;
    top:50%;
    left:0;
}
.arvr_btn{
    position: absolute;
    top:50%;
    width:60px;
    height:130px;
    cursor: pointer;
    margin-top: -65px;
    z-index: 9;
}
.arvr_btn1{
    left:0;
}
.arvr_btn2{
    right:0;
}
.arvr_btn img{
    width:100%;
}
.arvr_top_cont{
    width:1800px;
    margin: auto;
    overflow: hidden;
}
.arvr_top_ul{
    width:1000%;
    overflow: hidden;
}
.arvr_top_ul_li{
    position: relative;
    float: left;
    width:344px;
    height:170px;
    -webkit-transition: all 1s;
    -moz-transition: all 1s;
    -ms-transition: all 1s;
    -o-transition: all 1s;
    transition: all 1s;
    padding: 0 8px;
}
/*.arvr_top_ul_li img{
    width: 100%;
}*/
.arvr_top_ul_li_video{
    width: 100%;
    height: auto;
}
.arvr_img_div{
    width:100%;
    height:100%;
}

.arvr_top_img_bg{
    display: block;
    position: absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background-color: rgba(0,0,0,.5);
    cursor: pointer;
}
.arvr_top_txt{
    position: absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    color:#fff;
    text-align: center;
    font-size: 1.4em;
    font-weight: bold;
    color: #fff;
    /*letter-spacing: 0.3em;*/
}
.arvr_video_btn{
    position: absolute;
    display: none;
    -webkit-transition: all 1s;
    -moz-transition: all 1s;
    -ms-transition: all 1s;
    -o-transition: all 1s;
    transition: all 1s;
    z-index: 99;
    cursor: pointer;
}
.arvr_video_btn1{
    top:50%;
    left:50%;
    width:60px;
    height:60px;
    margin-top: -30px;
    margin-left: -30px;
}
.arvr_video_btn img{
    width: 100%;
}
.arvr_video_btn2{
    bottom:10px;
    right:20px;
}

/*.arvr_top_ul_li:hover .arvr_video_btn{
    display: block;
}*/
/*.arvr_top_ul_li:hover .arvr_top_txt{
    display: none;
}*/
/*.arvr_top_ul_li:hover .arvr_top_ul_li_video{opacity: 0;}
!*.arvr_top_ul_li:hover #arvr_video{opacity:1;}*!*/

.qp_video{
    position: fixed;
    top:0;
    left:0;
    width: 100%;
    height:100%;
    z-index: 9999;
    display: none;
    overflow: hidden;
    background: #000;
}
.qp_video video{
    width: 100%;
    height: 100%;
}
.qp_video_fh{
    position: absolute;
    top:50%;
    left:50%;
    width: 80px;
    height: 80px;
    margin: -40px 0 0 -40px;
    cursor: pointer;
    opacity: 0;
    -webkit-transition: all 1s;
    -moz-transition: all 1s;
    -ms-transition: all 1s;
    -o-transition: all 1s;
    transition: all 1s;
}
.qp_video:hover .qp_video_fh{
    opacity: 1;
}

/*面包屑导航*/
.dcrumbs{
    width: 100%;
    background-color: #fff;
    margin-top: 10px;
}
.dcrumbs_div{
    width: 100%;
    max-width: 1800px;
    margin: 0 auto;
    box-sizing: border-box;
}
.dcrumbs_div_h2{
    font-size: 16px;
    color:#333;
    line-height: 40px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
}
.dcrumbs_div_h2_span{
    color:#bd2a2f;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    padding-left: 5px;
}


/*新闻详情页*/
.dnewsbox{
    width: 100%;
    max-width: 1800px;
    margin: 20px auto;
    background-color: #fff;
    padding: 0 20px 60px;
    box-sizing: border-box;
}
.dnewsbox_title{
    width: 100%;
    padding: 20px 0;
    border-bottom: 1px solid #ccc;
    text-align: center;
}
.dnewsbox_title_h2{
    font-size: 18px;
    color:#333;
    line-height: 30px;
}
.dnewsbox_title_p{
    font-size: 12px;
    color:#999;
    line-height: 30px;
}
.dnewsbox_div{
    width: 100%;
    padding: 20px 0;
}
.dnewsbox_div img{
    width: auto;
    max-width: 100%;
    margin: 10px auto;
}
.dnewsbox_div p{
    font-size: 14px;
    color:#333;
    line-height: 28px;
}
.dnewsbox_fy{
    width: 100%;
    border-top: 1px solid #ccc;
    padding: 15px 0;
}
.dnewsbox_fy a{
    font-size: 16px;
    color:#999;
    line-height: 30px;
    width: 50%;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
    -ms-transition: all 0.5s;
    -o-transition: all 0.5s;
    transition: all 0.5s;
}
.dnewsbox_fy a.left{
    float: left;
    text-align: left;
}
.dnewsbox_fy a.right{
    float: right;
    text-align: right;
}
.dnewsbox_fy a:hover{
    color:#bd2a2f
}


/*产品详情页*/
.cptitle{
    width: 100%;
    padding: 15px 0;
}
.cptitle_h2{
    font-size: 16px;
    color:#333;
    line-height: 40px;
}
.cptitle_div{
    width: 100%;
    height: 1px;
    background-color: #ccc;
    position: relative;
}
.cptitle_div_div{
    width: 60px;
    height: 3px;
    background-color: #bd2a2f;
    position: absolute;
    left: 0;
    top:-1px;
}
.cptitle_content{
    width: 100%;
    position: relative;
}
.cptitle_content p{
    font-size: 14px;
    color:#333;
    line-height: 28px;
    text-align: justify;
}
.cptitle_content img{
    width: auto;
    margin: 10px auto;
    max-width: 100%;
}
.cptitle_content video{
    width: auto;
    margin: 10px auto;
    max-width: 70%;
    display: block;
    cursor: pointer;
}
.kong{
    width: 100%;
    height: 20px;
}

/*建筑一级*/
.darbox{
    width: 100%;
    margin: 20px auto;
    max-width: 1800px;
}
.darbox_div{
    width: 100%;
}
.darbox_div_left{
    position: relative;
    width:84.5%;
}
.darbox_div_ul{
    width: 100%;
}
.darbox_div_ul_li{
    width: 18.5%;
    margin-right: 1.5%;
    position: relative;
}
.darbox_div_right{
    width: 15.5%;
}
.darbox_div_ul_li_news{
    width: 100%;
    overflow: hidden;
    position: relative;
}
.darbox_div_ul_li_img{
    width: 100%;
}
.darbox_div_ul_li_img img{
    width: 100%;
}
.darbox_div_ul_li_text{
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 40px;
    background: rgba(0,0,0,0.7);
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
    -ms-transition: all 0.5s;
    -o-transition: all 0.5s;
    transition: all 0.5s;
}
.darbox_div_ul_li_text_h2{
    width: 100%;
    color:#fff;
    line-height: 40px;
    text-align: center;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
    -ms-transition: all 0.5s;
    -o-transition: all 0.5s;
    transition: all 0.5s;
}
.darbox_div_ul_li:hover .darbox_div_ul_li_text{
    height: 100%;
}
.darbox_div_ul_li_text_h2{
    height: 40px;
    position: absolute;
    left: 0;
    top:50%;
    margin-top: -20px;
}

.darbox_div_ul_li_news_text{
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: absolute;
    left: 0;
    top:0;
    padding: 5px 10px;
    box-sizing: border-box;
}
.darbox_div_ul_li_news_text_ul{
    width: 100%;
}
.darbox_div_ul_li_news_text_ul_li{
    margin-top: 10px;
    overflow: hidden;
}
.darbox_div_ul_li_news_text_ul_li a{
    font-size: 16px;
    color:#333;
    line-height: 30px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}

@media screen and (max-width: 1500px){
    .dcrumbs_div{
        padding: 0 10px;
    }
    .darbox_div_left{
        width:79%;
        margin-left: 10px;
    }
    .darbox_div_right{
        width:19%;
    }
    .darbox_div_ul_li{
        width: 24%;
        margin-right: 1%;
        margin-bottom: 1%;
    }
}

@media screen and (max-width: 1280px){
    .darbox_div_left{
        width:74%;
    }
    .darbox_div_right{
        width:24%;
    }
    .darbox_div_ul_li{
        width: 32.3%;
    }
}
@media screen and (max-width: 768px){
    .darbox_div_left{
        width:100%;
    }
    .darbox_div_right{
        width:100%;
        margin: 20px 0;
    }
    .darbox_div_right .darbox_div_ul_li_img{
        height: 160px;
    }
    .darbox_div_ul_li{
        width: 49%;
        overflow: hidden;
    }
    .darbox_div_ul_li_news{
        width: 98%;
        margin: 1% auto;
    }
    .cptitle_content video{width: 100%}
}

@media screen and (max-width: 440px){
    .darbox_div_ul_li{
        width: 98%;
        margin: 1% auto;
        float: none;
    }

}

/*建筑二级页面*/
.dar_01_ul{
    width: 100%;
    overflow: hidden;
}
.dar_01_ul_li.arvr_top_ul_li{
    width: 19%;
    margin-right: 1%;
    position: relative;
    overflow: hidden;
    height: auto;
    padding: 0;
    margin-bottom: 15px;
}
.dar_01_ul_li_video{
    width: 100%;
}
.dar_01_ul_li_title{
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    position: absolute;
    left: 0;
    top:0;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
    -ms-transition: all 0.5s;
    -o-transition: all 0.5s;
    transition: all 0.5s;
    cursor: pointer;
}
.dar_01_ul_li_title_h2{
    width: 100%;
    font-size: 16px;
    line-height: 28px;
    color:#fff;
    text-align: center;
    position: absolute;
    left: 0;
    top:50%;
    margin-top: -14px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}
.dar_01_ul_li_bg_videobut{
    width: 62px;
    height: 62px;
    background: url("../images/dsp.png") center no-repeat;
    position: absolute;
    left: 50%;
    margin-left: -31px;
    top:50%;
    margin-top: -31px;
}
.dar_01_ul_li_bg_qpbut{
    width: 20px;
    height: 20px;
    background: url("../images/dqp.png") center no-repeat;
    position: absolute;
    right: 4%;
    bottom:4%;
}
.dar_01_ul_li:hover .dar_01_ul_li_title_h2{
    display: none;
}
.dar_01_ul_li:hover .dar_01_ul_li_bg_qpbut,.dar_01_ul_li:hover .dar_01_ul_li_bg_videobut{
    display: block;
}


@media screen and (max-width: 1920px){
    .arvr_top_cont{
        width: 1580px;
    }
    .arvr_top_ul_li{
        width:300px;
    }
}
@media screen and (max-width: 1680px){
    .arvr_top_cont{
        width: 1430px;
    }
    .arvr_top_ul_li{
        width:270px;
        height: auto;
    }
}
@media screen and (max-width: 1525px){
    .arvr_top_cont{
        width: 1250px;
    }
    .arvr_top_ul_li{
        width:240px;
        padding: 0 5px;
    }
    .dar_01_ul_li.arvr_top_ul_li{margin: 0 0.5% 15px;}
}
@media screen and (max-width: 1336px){
    .arvr_top_cont{
        width: 1000px;
    }
    .arvr_btn{width: 35px;height:76px;margin-top: -38px;}
    .dar_01_ul_li.arvr_top_ul_li{width: 24%;}
}
@media screen and (max-width: 1080px){
    .arvr_top_cont{
        width: 840px;
    }
    .arvr_top_ul_li{
         width:200px;
     }
    .nav_ul li a{
        padding:10px 10px;
    }
    .arvr_video_btn1{
        width: 40px;
        width: 40px;
    }


}
@media screen and (max-width: 912px){
    .arvr_top_cont{
        width: 630px;
    }
    .dar_01_ul_li.arvr_top_ul_li{width: 32.3%;}
}
@media screen and (max-width: 700px){
    .arvr_top_cont{
        width:420px;
    }
    .dar_01_ul_li.arvr_top_ul_li{width: 48%;margin-left: 1%;}
}
@media screen and (max-width: 490px){
    .arvr_top_cont{
        width:100%;
    }
    .arvr_top_ul_li{
        width: auto;
        height:210px;
        padding: 0 0;
    }
    .arvr_top_ul_li_video{
        height:auto;
    }
    .dar_01_ul_li.arvr_top_ul_li{width: 98%;}
    .arvr_video_btn1{
        width: 60px;
        width: 60px;
    }
}