.active_animation {
 opacity:0;
 visibility:visible;
 -webkit-animation:fadeinup 1s .2s ease both;
 -moz-animation:fadeinup 1s .2s ease both;
 -ms-animation:fadeinup 1s .2s ease both;
 animation:fadeinup 1s .2s ease both
}
.active_animation:nth-child(1) {
 animation-delay:0s
}
.active_animation:nth-child(2) {
 animation-delay:.2s
}
.active_animation:nth-child(3) {
 animation-delay:.3s
}
.active_animation:nth-child(4) {
 animation-delay:.4s
}
.active_animation:nth-child(5) {
 animation-delay:.5s
}
.active_animation:nth-child(6) {
 animation-delay:.6s
}
.active_animation:nth-child(7) {
 animation-delay:.7s
}
.active_animation:nth-child(8) {
 animation-delay:.8s
}
.active_animation:nth-child(9) {
 animation-delay:.9s
}
.active_animation:nth-child(10) {
 animation-delay:1s
}
.active_animation:nth-child(11) {
 animation-delay:1.1s
}
.active_animation:nth-child(12) {
 animation-delay:1.2s
}
.active_animation:nth-child(13) {
 animation-delay:1.4s
}
.active_animation:nth-child(14) {
 animation-delay:1.4s
}
.active_animation:nth-child(15) {
 animation-delay:1.5s
}
.active_animation:nth-child(16) {
 animation-delay:1.6s
}
.active_animation:nth-child(17) {
 animation-delay:1.7s
}
.active_animation:nth-child(18) {
 animation-delay:1.8s
}
.active_animation:nth-child(19) {
 animation-delay:1.9s
}
.active_animation:nth-child(20) {
 animation-delay:2.0s
}




ovg_scroll放在你需要动作的上一个类
/***如果需要其他的方向自己改写
.active_animation {
 opacity:0;
 visibility:visible;
 -webkit-animation:fadeinup 1s .2s ease both;
 -moz-animation:fadeinup 1s .2s ease both;
 -ms-animation:fadeinup 1s .2s ease both;
 animation:fadeinup 1s .2s ease both
}
fadeinup这个动作;放在实力级
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