为什么我的CSS3加载动画无法在移动设备上运行？

Question

它在台式机上运行良好，但在移动设备上却获得了静态状态，而不是淡入淡出。

我将代码放在这里...

https://codepen.io/anon/pen/jvKZGW

@keyframes flickerAnimation {
0%   { opacity:1; }
50%  { opacity:0; }
100% { opacity:1; }
}
@-o-keyframes flickerAnimation{
0%   { opacity:1; }
50%  { opacity:0; }
100% { opacity:1; }
}
@-moz-keyframes flickerAnimation{
0%   { opacity:1; }
50%  { opacity:0; }
100% { opacity:1; }
}
@-webkit-keyframes flickerAnimation{
0%   { opacity:1; }
50%  { opacity:0; }
100% { opacity:1; }
}

.loading  {
-webkit-animation: flickerAnimation 1s infinite;
-moz-animation: flickerAnimation 1s infinite;
-o-animation: flickerAnimation 1s infinite;
animation: flickerAnimation 1s infinite;
background: #215c87;
display: block;
width: 10px;
height: 10px;
border-radius: 50%;
position: absolute;
top: 10px;
right: 10px;
}