.banner {
    position: relative;
    height: 1648px;
}

.banner-bg {
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    overflow: hidden;
}

.banner-bg .bg {
    transition-duration: .6s;
    -webkit-transition-duration: .6s;
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    background: no-repeat center center;
    background-size: cover;
}

.banner-titles {
    position: relative;
    padding: 140px 0 52px 0;
    height: 34px;
    line-height: 34px;
    z-index: 3;
    text-align: center;
    overflow: hidden;
}

.banner-titles .child {
    text-align: center;
    color: #fff;
    font-size: 26px;
    font-family: 'avantgardeitcbybt';
}

.banner-imgs {
    position: relative;
    height: 544px;
    z-index: 3;
    -webkit-perspective: 1200px;
    perspective: 1200px;
}

.banner-imgs .cards {
    position: absolute;
    top: -92px;
    height: 100%;
    width: 100%;
    -webkit-perspective: 1200px;
    perspective: 1200px;
}

.banner-imgs .card {
    position: absolute;
    top: -28em;
    left: 50%;
    display: block;
    overflow: hidden;
    width: 709px;
    height: 1261px;
    background-repeat: no-repeat;
}

.banner-imgs .card-1 {
    z-index: 3;
}

.banner-imgs .card-2 {
    z-index: 2;
}

.banner-imgs .card-3 {
    z-index: 1;
}

.banner-imgs .pointers {
    position: absolute;
    top: -186px;
    bottom: 0px;
    right: 0px;
    left: 0px;
    margin: auto;
    width: 150px;
    height: 150px;
    z-index: 4;
}

.banner-imgs .pointers .bg {
    border-radius: 150px;
    -webkit-border-radius: 150px;
    transition-duration: .3s;
    -webkit-transition-duration: .3s;
    position: absolute;
    top: 0px;
    bottom: 0px;
    right: 0px;
    left: 0px;
    margin: auto;
    z-index: 4;
}

.banner-imgs .pointers .icon {
    transition-duration: .3s;
    -webkit-transition-duration: .3s;
    position: absolute;
    top: 0px;
    bottom: 0px;
    right: 0px;
    left: 0px;
    margin: auto;
    z-index: 4;
}

.banner-imgs .pointers:hover .bg {
    background: #000;
    opacity: 0.8;
}

.banner-titles2 {
    position: relative;
    z-index: 3;
    height: 120px;
    text-align: center;
    color: #fff;
    overflow: hidden;
}

.banner-titles2 .content {
    transition-duration: .6s;
    -webkit-transition-duration: .6s;
    position: absolute;
    bottom: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    text-align: center;
}

.banner-titles2 .title {
    line-height: 30px;
    font-size: 16px;
}

.banner-titles2 .title-en {
    line-height: 66px;
    font-size: 72px;
    font-family: 'avantgardeitcbybt';
}

.banner-muns {
    position: relative;
    z-index: 3;
    height: 188px;
    width: 1200px;
    padding: 100px 0px 50px 0px;
    margin: 0 auto;
}

.banner-muns .mun {
    position: absolute;
    top: 100px;
    height: 188px;
    width: 256px;
    text-align: center;
    color: #fff;
}

.banner-muns .mun1 {
    left: 0px;
}

.banner-muns .mun2 {
    left: 0px;
    right: 0px;
    margin: 0 auto;
}

.banner-muns .mun3 {
    cursor: pointer;
    right: 0px;
}

.banner-muns .mun .mun-img {
    height: 66px;
    line-height: 66px;
}

.banner-muns .mun .mun-img img {
    vertical-align: middle;
}

.banner-muns .mun .mun-title {
    position: relative;
    height: 86px;
    line-height: 86px;
    margin: 6px 0 3px 0;
    font-family: 'avantgardeitcbybt';
    font-size: 90px;
}

.banner-muns .mun .mun-title .add {
    display: block;
    position: absolute;
    bottom: 12px;
    right: 28px;
    height: 30px;
    line-height: 30px;
    font-size: 30px;
}

.banner-muns .mun .mun-titleen {
    line-height: 18px;
    font-size: 14px;
    font-family: Arial, Helvetica, sans-serif;
}

.banner-muns .sub {
    position: absolute;
    bottom: 66px;
}

.banner-muns .sub1 {
    left: 335px;
}

.banner-muns .sub2 {
    right: 335px;
}

.banner-imgs2 {
    position: relative;
    z-index: 3;
    width: 100%;
    height: 590px;
    line-height: 590px;
    margin: 0 auto;
    overflow: hidden;
}

.banner-imgs2 .content {
    transition-delay: .2s;
    -webkit-transition-delay: .2s;
    transition-duration: .6s;
    -webkit-transition-duration: .6s;
    position: absolute;
    bottom: 0px;
    left: 0px;
    right: 0px;
    width: 100%;
    height: 100%;
    text-align: center;
    margin: 0 auto;
}

.banner-imgs2 .content img {
    vertical-align: middle;
    max-width: 100%;
    max-height: 100%;
}

.banner-imgs2 .content2 {
    width: 1235px;
    height: 568px;
}

.banner-imgs2 .content2 .img {
    position: absolute;
}

.banner-imgs2 .content2 .img-kuang {
    top: 0px;
    left: 0px;
    right: 0px;
    width: 789px;
    height: 491px;
    margin: 0 auto;
    overflow: hidden;
}

.banner-imgs2 .content2 .img-kuang .k {
    position: absolute;
    top: 0px;
    bottom: 0px;
    right: 0px;
    left: 0px;
}

.banner-imgs2 .content2 .img-kuang .p {
    transition-delay: .4s;
    -webkit-transition-delay: .4s;
    transition-duration: .8s;
    -webkit-transition-duration: .8s;
    position: absolute;
    top: 0px;
    bottom: 0px;
    right: 0px;
    left: -2px;
    margin: auto;
}

.banner-imgs2 .content2 .img-foot {
    top: 491px;
    left: 0px;
    right: 0px;
    width: 966px;
    height: 20px;
    margin: 0 auto;
    background: url('../images/case/bb2_3.png') no-repeat center center;
}

.banner-imgs2 .content2 .img-shadow {
    bottom: 0px;
    left: 0px;
    right: 0px;
    width: 1235px;
    height: 114px;
    margin: 0 auto;
    background: url('../images/case/bb2_2.png') no-repeat center center;
}

.banner-imgs2 .btns {
    position: absolute;
    height: 60px;
    width: 1100px;
    margin: auto;
    top: 0px;
    bottom: 0px;
    left: 0px;
    right: 0px;
}

.banner-imgs2 .btn {
    transition-duration: .3s;
    -webkit-transition-duration: .3s;
    cursor: pointer;
    position: absolute;
    top: 0px;
    bottom: 0px;
    width: 60px;
    height: 60px;
    line-height: 60px;
    text-align: center;
    background: no-repeat center center;
    background-image: url('../images/case/btn_bg.png');
    border-radius: 60px;
    -webkit-border-radius: 60px;
}

.banner-imgs2 .btn:hover {
    background: #ff5b5b;
}

.banner-imgs2 .btn img {
    vertical-align: middle;
}

.banner-imgs2 .btn.left-btn {
    left: 0px;
}

.banner-imgs2 .btn.right-btn {
    right: 0px;
}

.main {
    margin: 230px auto 0 auto;
}

.main .main-nav{padding-bottom:16px;position:relative;height:34px;line-height:34px;margin:0 12px;}
.main .main-nav:after{content: "020"; display: block; height: 0; clear: both;visibility:hidden;}
.main .main-nav li{transition-duration: .3s;-webkit-transition-duration:.3s;cursor:pointer;position:relative;float:left;height:34px;text-align:center;width:146px;color:#767676;font-size:13px;font-family:Arial, Helvetica, sans-serif;}
.main .main-nav li.on{color:#fff;}
.main .main-nav li:hover{color:#ff5d5d;}
.main .main-nav li.on:hover{color:#fff;}
.main .main-nav .nav-bg{transition-duration: .3s;-webkit-transition-duration:.3s;position:absolute;left:0px;top:0px;width:146px;height:34px;background:#ff5d5d;border-radius:34px;-webkit-border-radius:34px;}

.main .main-content {
    width: 2020px;
    margin: 0 auto;
    position: relative;
    padding: 0 0 40px 0;
    text-align: left;
}

.main .main-content:after {
    content: "020";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}

.main .main-content .child-line:after {
    content: "020";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}

.main .main-content .child {
    margin: 24px 12px;
    display: inline-block;
    *display: inline;
    *zoom: 1;
    position: relative;
    width: 380px;
    height: 248px;
    background: #fff;
    border-radius: 4px;
    -webkit-border-radius: 4px;
    box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.1);
    -webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.1);
}

.main .main-content .child.no {
    margin-right: 0px;
}

.main .main-content .child .child-image {
    position: absolute;
    top: 21px;
    bottom: 21px;
    left: 21px;
    right: 21px;
    overflow: hidden;
}

.main .main-content .child .child-image .img {
    transition-duration: .6s;
    -webkit-transition-duration: .6s;
    width: 100%;
    height: 100%;
}

.main .main-content .child .child-image-bg {
    transition-duration: .3s;
    -webkit-transition-duration: .3s;
    opacity: 0;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    background: #000;
}

.main .main-content .child .child-image-icon {
    transform: scale(0);
    -webkit-transform: scale(0);
    transition-duration: .3s;
    -webkit-transition-duration: .3s;
    opacity: 0;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    margin: auto;
    background: url('../images/case/case-bg.png') no-repeat center center;
}

.main .main-content .child .child-image-icon img {
    transform: scale(0);
    -webkit-transform: scale(0);
    transition-duration: .3s;
    -webkit-transition-duration: .3s;
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    margin: auto;
    opacity: 0;
}

.main .main-content .child .shadow {
    transition-duration: .3s;
    -webkit-transition-duration: .3s;
    position: absolute;
    bottom: -19px;
    width: 386px;
    height: 19px;
    left: 50%;
    margin-left: -193px;
    display: block;
    opacity: 0;
}

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

.main .main-content .child:hover .child-image-bg {
    opacity: 0.2;
}

.main .main-content .child:hover .child-image-icon {
    transition-delay: .1s;
    -webkit-transition-delay: .1s;
    opacity: 1;
    transform: scale(1);
    -webkit-transform: scale(1);
}

.main .main-content .child:hover .child-image-icon img {
    transition-delay: .2s;
    -webkit-transition-delay: .2s;
    opacity: 1;
    transform: scale(1);
    -webkit-transform: scale(1);
}

.main .main-content .child:hover .shadow {
    opacity: 1;
}

@media (max-width: 1211px) {
    .main .main-content {
        width: 816px;
    }
}

@media (min-width: 1212px) and (max-width: 1616px) {
    .main .main-content {
        width: 1221px;
    }
}

@media (min-width: 1615px) and (max-width: 2020px) {
    .main .main-content {
        width: 1632px;
    }
}