#intro{margin: 0 auto;padding: 0;background-size: cover;}
#intro .bg1{height: 800px;padding: 0 auto;position: absolute;width:100%; z-index: 50;}
#intro .bg2{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 40;}
#intro .bg3{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 30;}
#intro .bg4{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 20;}

#intro .bg5{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 10;}
#intro .bg6{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 9;}

#intro .bg7{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 8;}
#intro .bg8{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 7;}
#intro .bg9{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 6;}
#intro .bg10{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 0;}

#intro .bg11{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 5;}
#intro .bg12{height: 800px;margin: 0 auto;padding: 0;position: absolute;width: 100%;z-index: 40;}