.nav{
    width: 100%;
    height: 120px;
    background: #F7F7F7;
    padding-top: 35px;
}
.nav .content{
    text-align: center;
    width: auto;
}
.nav .content a{
    display: inline-block;
    margin-right: 20px;
    width: 160px;
    height: 50px;
    border: 1px solid #CCCCCC;
    box-sizing: border-box;
    text-align: center;
    line-height: 50px;
    font-size:18px;
    font-family:Microsoft YaHei;
    font-weight:400;
    color:rgba(38,38,38,1);
    transition-duration: .3s;
    border-radius: 50px;
}
.nav .content a:last-of-type{
    margin-right: 0;
}
.nav .content a.on,.nav .content a:hover{
    background: #C7A05D;
    border-color: #C7A05D;
    color: #fff;
}
.item{
    width: 1200px;
    margin: 0 auto;
    height: 500px;
    padding-top: 50px;
}
.item .left{
    width: 600px;
    height: 380px;
    float: left;
    position: relative;
}
.item .left div{
    width: 570px;
    height: 350px;
    border: 3px solid #FFF;
    position: absolute;
    top: 15px;
    left: 15px;
}
.item .right{
    width: 570px;
    float: right;
}
.item .right h2{
    font-size: 40px;
    font-family: Source Han Sans CN;
    font-weight: bold;
    color: #262626;
    margin-top: 15px;
}
.item .right h2 span{
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #999999;
}
.item .right>span{
    display: block;
    width: 50px;
    height: 4px;
    background: #C7A05D;
    margin-top: 15px;
    margin-bottom: 20px;
}
.item .right p{
    font-size: 14px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    line-height: 26px;
    color: #666666;
    text-align: justify;
    text-indent: 28px;
    margin-bottom: 20px;
}

.item2{
    width: 1200px;
    height: 540px;
    margin: 0 auto;
    padding-top: 70px;
}

.item2 .left{
    width: 630px;
    height: 400px;
    float: left;
}
.item2 .right{
    width: 530px;
    float: right;
}
.item2 .right h2{
    font-size: 40px;
    font-family: Source Han Sans CN;
    font-weight: bold;
    margin-top: 20px;
    color: #C7A05D;
}
.item2 .right h3{
    font-size: 32px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #262626;
}
.item2 .right span{
    display: block;
    width: 70px;
    height: 4px;
    background: #C7A05D;
    margin-top: 20px;
    margin-bottom: 30px;
}
.item2 .right p{
    font-size: 14px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    line-height: 26px;
    color: #666666;
    text-align: justify;
}
.item2 .right a{
    display: block;
    width: 280px;
    height: 55px;
    text-align: center;
    line-height: 55px;
    border-radius: 5px;
    background: #C7A05D;
    font-size: 18px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #FFFFFF;
    margin-top: 50px;
}

.item3 .top{
    width: 100%;
    height: 408px;
    background: url("../images/acb.png") repeat-x center top;
    overflow: hidden;
}
.item3 .top .content h2{
    font-size: 40px;
    font-family: Source Han Sans CN;
    font-weight: bold;
    color: #FFFFFF;
    margin-top: 70px;
    text-align: center;
}
.item3 .top .content p{
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #FFFFFF;
    text-align: center;
}
.item3 .top .content .imgBox{
    margin-top: 50px;
}
.item3 .top .content .imgBox img{
    display: block;
    float: left;
}
.item3 .bottom{
    width: 100%;
    overflow: hidden;
    background: #F5F5F5;
    padding-bottom: 100px;
}
.item3 .bottom .content{
    background: #FFF;
    padding: 20px;
    padding-bottom: 0;
}
.item3 .bottom .content .sub-item{
    float: left;
    margin-right: 20px;
    margin-bottom: 20px;
    width: 216px;
    height: 130px;
    cursor: pointer;
    transition-duration: .3s;
}
.item3 .bottom .content .sub-item img{
    width: 100%;
    height: auto;
}
.item3 .bottom .content .sub-item:nth-of-type(5n){
    margin-right: 0;
}
.item3 .bottom .content .sub-item:hover{
    box-shadow: 0px 0px 20px 0px rgba(0,0,0,0.2);
}