windows 7，chrome 31.0.1650.57 m很好！但在：
window XP，chrome 31.0.1650.57 m或chrome 21.0.1180.89奇怪的动画发生
这主要是代码
.cl-effect-2 a span {
-webkit-transition: -webkit-transform 0.3s;
-moz-transition: -moz-transform 0.3s;
transition: transform 0.3s;
-webkit-transform-origin: 50% 0;
-moz-transform-origin: 50% 0;
transform-origin: 50% 0;
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
transform-style: preserve-3d;
}
.cl-effect-2 a span::before {
-webkit-transition: background 0.3s;
-moz-transition: background 0.3s;
transition: background 0.3s;
-webkit-transform: rotateX(-90deg);
-moz-transform: rotateX(-90deg);
transform: rotateX(-90deg);
-webkit-transform-origin: 50% 0;
-moz-transform-origin: 50% 0;
transform-origin: 50% 0;
}
.cl-effect-2 a:hover span,
.cl-effect-2 a:focus span {
-webkit-transform: rotateX(90deg) translateY(-22px);
-moz-transform: rotateX(90deg) translateY(-22px);
transform: rotateX(90deg) translateY(-22px);
}