body{
    -webkit-user-select:none;
    -moz-user-select:none;
    -ms-user-select:none;
    user-select:none;
}
.container{
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}
.bb-custom-wrapper{
    position: relative;
}
.bb-gif4{
    width: 50%;
    margin-top: auto;
    margin-bottom: auto;
    margin-left: 50%;
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 100;
}
.bb-a8{
    width: 322px;
    height: 42px;
    background: transparent;
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    margin-left: auto;
    margin-right: auto;
    top: 417px;
}
.next_btn{
    position: fixed;
    width: 37px;
    height: 75px;
    top: 0;
    right: 0;
    bottom: 0;
    margin-top: auto;
    margin-bottom: auto;
    z-index: 100;
    transition: top 0.1s;
    -moz-transition: top 0.1s; 
    -webkit-transition: top 0.1s; 
    -o-transition: top 0.1s; 
}
.next_btn:hover{
    top: -10px;
}
.prev_btn{
    position: fixed;
    width: 37px;
    height: 75px;
    top: 0;
    left: 0;
    bottom: 0;
    margin-top: auto;
    margin-bottom: auto;
    z-index: 100;
    transition: top 0.1s;
    -moz-transition: top 0.1s; 
    -webkit-transition: top 0.1s; 
    -o-transition: top 0.1s; 
}
.prev_btn:hover{
    top: -10px;
}
.nav{
    position: absolute;
    height: 214.75px;
    top: 200px;;
    left: 102px;
    z-index: 100;
}
.nav .nav_bar{
    position: absolute;
    top: 6px;
    left: -10.57px;
    height: 214.75px;
    width: 1px;
    background: #888888;
    opacity: 0.3;
}
.nav > .nav_group{
    height: 214.75px;
}
.nav > .nav_group > .nav_item{
    margin-bottom: 13%;
    position: relative;
}
.nav > .nav_group > .nav_item > span{
    font-family: '微软雅黑';
    font-size: 14px;
    color: #888888;
    cursor: pointer;
    padding-left: 8px;
    padding-right: 8px;
    border-radius: 9px;
    border: 2px solid transparent;
}
.nav > .nav_group > .nav_item > span:hover{
    border: 2px solid #f8d64e;
}
.nav > .nav_group > .nav_item > span:after{
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid #888888;
    position: absolute;
    top: 4px;
    left: -14.8px;
    opacity: 0.7;
}
.nav > .nav_group > .nav_item > span:before{
    content: '';
    width: 1px;
    height: 20px;
    background: #888888;
    position: absolute;
    top: 14px;
    left: -11px;
    opacity: 0.7;
}
.nav > .nav_group > .nav_item:last-of-type > span:before{
    height: 0;
}
.nav > .nav_group > .nav_item > span.active{
    background: #f8d64e; 
    color: #333333;
    border: 2px solid #f8d64e;
}
.nav > .nav_group > .nav_item > span.active:after{
    content: '';
    width: 11px;
    height: 11px;
    background: #f8d64e;
    border: 1px solid #f8d64e;
    border-radius: 50%;
    position: absolute;
    top: 3px;
    left: -16px;
    opacity: 1;
}

.item3-contain{
    width: 1200px;
    height: 584px;
    background: transparent;
    position: absolute;
    bottom: 0;
    left: 360px;
}
.item3-contain .item3-it1{
    position: absolute;
    bottom: 0;
    left: 43.16%;
    z-index: 2;
    width: 14.42%;
}
.item3-contain .item3-it1 img{
    opacity: 0;
    width: 100%;
}
.item3-contain .item3-it2{
    position: absolute;
    bottom: 14%;
    right: 15.58%;
    width: 10.92%;
}
.item3-contain .item3-it2 img{
    opacity: 0;
    width: 100%;
}
.item3-contain .item3-it3{
    position: absolute;
    bottom: 21.06%;
    left: 21.83%;
    width: 10.5%;
}
.item3-contain .item3-it3 img{
    opacity: 0;
    width: 100%;
}
.item3-contain .item3-it4{
    position: absolute;
    bottom: 42.29%;
    right: 5.67%;
    width: 8.67%;
}
.item3-contain .item3-it4 img{
    opacity: 0;
    width: 100%;
}
.item3-contain .item3-it5{
    position: absolute;
    bottom: 47.6%;
    left: 4.16%;
    width: 11.16%;
}
.item3-contain .item3-it5 img{
    opacity: 0;
    width: 100%;
}

.item3-contain .item3-it6{
    position: absolute;
    bottom: 57.02%;
    left: 40.16%;
    width: 7.75%;
}
.item3-contain .item3-it6 img{
    opacity: 0;
    width: 100%;
}
.item3-contain .item3-it7{
    position: absolute;
    bottom: 64.38%;
    right: 27.67%;
    z-index: 1;
    width: 6.75%;
}
.item3-contain .item3-it7 img{
    opacity: 0;
    width: 100%;
}

.item5-contain{
    width: 1200px;
    height: 630px;
    background: transparent;
    position: absolute;
    bottom: 120px;
    left: 360px;
}
.item5-contain .item5-left{
    width: 11.75%;
    height: 100%;
}
.item5-contain .item5-it{
    width: 100%;
    margin-bottom: 15.8%;
    position: relative;
}
.item5-contain .item5-it img:first-of-type{
    width: 100%;
}
.item5-contain .item5-it img:nth-of-type(2){
    position: absolute;
    width: 48.93%;
    left: 90.07%;
    top: 0;
    bottom: 0;
    margin-top: auto;
    margin-bottom: auto;
    z-index: 6;
    display: none;
}
.item5-contain .item5-it img:last-of-type{
    position: absolute;
    display: none;
    width: 239%;
    left: 130.49%;
    top: 0;
    z-index: 5;
}
.item5-contain .item5-it:nth-of-type(3) img:last-of-type{
    top: -19.6%;
}
.item5-contain .item5-it:nth-of-type(4) img:last-of-type{
    top: auto;
    bottom: 0;
}
.item5-contain .item5-right{
    width: 886px;
}
.item5-contain .item5-right img{
    width: 886px;
}

.item6-contain{
    width: 1200px;
    height: 749px;
    background: transparent;
    position: absolute;
    bottom: 0;
    left: 360px;
}
.item6-contain .item6-it{
    position: absolute;
}
.item6-contain .item6-it img{
    width: 100%;
}
.item6-contain .item6-it1{
    width: 238px;
    height: 238px;
    left: 481px;
    top: 245px;
    opacity: 1;
    background: url(../images/item6-img1B.png) center center no-repeat;
    background-size: 100% 100%;

}
.item6-contain .item6-it2{
    width: 110px;
    height: 110px;
    left: 850px;
    top: 292px;
    opacity: 0.8;
    background: url(../images/item6-img2A.png) center center no-repeat;
    background-size: 100% 100%;
}
.item6-contain .item6-it3{
    width: 110px;
    height: 110px;
    left: 1000px;
    top: 145px;
    opacity: 0.5;
    background: url(../images/item6-img3A.png) center center no-repeat;
    background-size: 100% 100%;
}
.item6-contain .item6-it4{
    width: 110px;
    height: 110px;
    left: 709px;
    top: 86px;
    opacity: 0.3;
    background: url(../images/item6-img4A.png) center center no-repeat;
    background-size: 100% 100%;
}
.item6-contain .item6-it5{
    width: 110px;
    height: 110px;
    left: 363px;
    top: 90px;
    opacity: 0.3;
    background: url(../images/item6-img5A.png) center center no-repeat;
    background-size: 100% 100%;
}
.item6-contain .item6-it6{
    width: 110px;
    height: 110px;
    left: 102px;
    top: 138px;
    opacity: 0.5;
    background: url(../images/item6-img6A.png) center center no-repeat;
    background-size: 100% 100%;
}
.item6-contain .item6-it7{
    width: 110px;
    height: 110px;
    left: 238px;
    top: 284px;
    opacity: 0.8;
    background: url(../images/item6-img7A.png) center center no-repeat;
    background-size: 100% 100%;
}


.item7-contain{
    width: 1200px;
    height: 330px;
    background: transparent;
    position: absolute;
    bottom: 0;
    top: 0;
    left: 0;
    right: 0;
    margin: auto;
}
.item7-contain .item7-it{
    width: 25%;
    margin-right: 10%;
    opacity: 0;
}
.item7-contain .item7-it3{
    margin-right: 0;
}