手机浏览器兼容问题：es6、-webkit-

@keyframes boom {
	0% {transform: rotate(0deg)}
	40% {transform: rotate(0deg)}
	60% {transform: rotate(65deg)}
	80% {transform: rotate(-45deg)}
	100% {transform: rotate(-45deg)}
}
@-webkit-keyframes boom {
	0% {-webkit-transform: rotate(0deg)}
	40% {-webkit-transform: rotate(0deg)}
	60% {-webkit-transform: rotate(65deg)}
	80% {-webkit-transform: rotate(-45deg)}
	100% {-webkit-transform: rotate(-45deg)}
}