body{
    background: #efefef;
    font-family: "PingFang SC","HiraginoSansGB-W3", "STHeitiSC-Light", "微软雅黑", SimHei,"Helvetica Neue",Helvetica,Arial,sans-serif;
    transition: all 1s linear;
}
.header{
    background: rgba(251,251,251,0);
}
.cont{
    padding-left: 10%;
    padding-right: 10%;
}
.air-nav{
    position: absolute;
    margin: 20px auto;
    left: 50%;
    margin-left: -600px;
    z-index: 5;
}
.air-nav img{
    /* width: 100%; */
}
.banner{
    padding-left: 0;
    padding-right: 0;
    width: 100%;
    height: 1160px;
    overflow: hidden;
    position: relative;
}
.banner ul{
    position: relative;
}
.banner ul li{
    padding-left: 0;
    padding-right: 0;
    width: 100%;
    height: 1160px;
    display: block; 
    transform: scale(1);
    transition: transform 5s linear; 
    opacity: 0;
    position: absolute;
    z-index: 1;
}
.banner ul li.active{
    z-index: 5;
}
.banner ul li a{
    display: block;
    width: 100%;
    height: 100%;
}
.link{
    /* display: block;
    width: 100%;
    height: 100%; */
}
.banner ul li .text{
    position: absolute;
    
}
.banner ul li .text h4{
    font-size: 36px;
    font-weight: 300;
    margin-bottom: 10px;
    color: #464646;
}
.banner ul li .text p{
    color: #333;
    font-size: 14px;
     margin-bottom: 10px;
}
.banner ul li.active{
    /* display: inline-block; */
    opacity: 1;

}
.banner ul li:nth-child(1){
    background: url('/img/20190607/05.jpg')no-repeat center;
    background-size: 2000px;
}
.banner ul li:nth-child(1) .text{
    top: 150px;
    left: 50%;
    margin-left: -355px;
}

.banner ul li:nth-child(1) .text p{
    text-align: right;
}
.banner ul li:nth-child(2) .text{
    top: 180px;
    left: 50%;
    margin-left: -250px;
}

.banner ul li:nth-child(2) .text p{
    text-align: right;
}
.banner ul li:nth-child(3) .text{
    top: 120px;
    left: 50%;
    margin-left: -300px;
}
.banner ul li:nth-child(4) .text{
    top: 600px;
    left: 50%;
    margin-left: -420px;
}

.banner ul li:nth-child(2){
/*    background: url('//airproce.oss-cn-beijing.aliyuncs.com/20171116/03.jpg')no-repeat center;*/
    background: url('/img/20190607/03.jpg')no-repeat center;
    background-size: 2000px;
}
.banner ul li:nth-child(3){
/*    background: url('//airproce.oss-cn-beijing.aliyuncs.com/20190124/banner-humidifier.png')no-repeat center;*/
    background: url('http://airproce.oss-cn-beijing.aliyuncs.com/20171116/01.jpg')no-repeat center;
    background-size: 2000px;
}
.banner ul li:nth-child(4){
/*    background: url('//airproce.oss-cn-beijing.aliyuncs.com/20171116/04.jpg')no-repeat center;*/
    background: url('/img/20190607/02.jpg')no-repeat center;
    background-size: 2000px;
}

.banner img{
    width: 100%;
    height: 900px;
}
.bannerBtn {
    width: 100%;
    position: absolute;
    bottom: 320px;
    left: 0;
    text-align: center;
    z-index: 6;
}
.bannerBtn > span  {
    /* float: left; */
    display: inline-block;
    width: 30px;
    height: 3px;
    border-radius: 5px;
    margin: 0 2px;
    background: rgba(1, 1, 1, .15);
    cursor: pointer;
}

.bannerBtn > span.current {
    background: rgba(1, 1, 1, .3);
}

.card{
    margin-bottom: 80px;
    margin-top: -268px;
    z-index: 6;
    position: relative;
}
.card img{
    width: 100%;
}
.card .col-sm-3{
    /* padding-left: 5px;
    padding-right: 5px; */
    padding-left: 0;
    padding-right: 0;
    width: calc(100%/5);
}
.card .col-sm-3 a div{
    background: #fff;
    box-shadow: 0 10px 40px rgba(100,100,100,.3);
}
.card .col-sm-3 a div p{
    text-align: center;
    font-size: 12px;
    color: #999;
    letter-spacing: 1px;
    height: 40px;
    line-height: 40px;
}

.callboard{
    display: none;
    position: absolute;
    width: 800px;
    background: #fff;
    left: 50%;
    margin-left: -400px;
    z-index: 999;
    top: 100px;
    padding: 40px;
    box-shadow: 2px 5px 40px rgba(100, 100, 100, .4);
    opacity: .9;
}
.callboard h3{
    font-family: PingFangSC-Medium,Microsoft YaHei;
    font-size: 22px;
    color: #50d2f9;
    text-align: center;
    margin-bottom: 40px;
    margin-top: 20px;
}
.callboard p{
    font-family: PingFangSC-Regular,Microsoft YaHei;
    font-size: 14px;
    color: rgba(0,0,0,0.40);
    line-height: 25px;
    margin-bottom: 10px;
}
.callboard span{
    float: right;
    color: rgba(0,0,0,.3);
    font-size: 22px;
    margin-top: -15px;
    margin-right: -10px;
    font-family: "HiraginoSansGB-W3";
    cursor: pointer;
    padding: 0 5px;
    display: block;
    z-index: 999;
}