#loading {
	background-color:#000000;
	height:100%;
	width:100%;
	position:fixed;
	z-index:1;
	margin-top:0px;
	top:0px;
}
#loading-center {
	position:absolute;
	left:35%;
	top:35%;
	height:200px;
	width:200px;
}
.round {
	border-radius:50% 50% 50% 50%;
	/*从半角到圆弧*/
		position:absolute;
	border-top:3px solid #ffff00;
	border-left:5px solid #ffffff;
	border-bottom:5px solid transparent;
	border-right:5px solid transparent;
	animation:animate 3s infinite;
}
#round_one {
	left:75px;
	top:75px;
	width:50px;
	height:50px;
}
#round_two {
	left:65px;
	top:65px;
	width:70px;
	height:70px;
	animation-delay:0.2s;
}
#round_three {
	left:55px;
	top:55px;
	width:90px;
	height:90px;
	animation-delay:0.4s;
}
#round_four {
	left:45px;
	top:45px;
	width:110px;
	height:110px;
	animation-delay:0.6s;
}
@keyframes animate {
	50% {
	transform:rotate(360deg) scale(0.8);
}
}