纯css3打造的一款非常炫的加载图。用在需要一定时间加载的地方非常合适。先上效果图：

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代码非常简单。没有用任何javascript代码。纯css3实现。

html代码：

 <div class="content">
        <div style="width: 970px; margin: auto">
        </div>
        <div class="rotate">
            <span class="triangle base"></span><span class="triangle no1"></span><span class="triangle no2">
            </span><span class="triangle no3"></span>
        </div>
    </div>

css代码：

    body {
	padding:0;
	margin:0;	
	background-color: #2a4e66;
  overflow: hidden;
}

.content {
	width:100%;
	height:100%;
	top:0;
	right:0;
	bottom:0;
	left:0;
	position:absolute;
}

.rotate {
	position: absolute;
	top: 50%;
	left: 50%;
	margin: -93px 0 0 -93px;
	background: transparent;
	width: 186px;
	height: 186px;
	border-radius: 50%;
	z-index: 20;
}

.rotate:after {
	content: '';	
	position: absolute;
	box-shadow: 0 0 30px #ffffff, 0 0 10px #ffffff, 0 0 2px #ffffff, inset 0 0 2px #ffffff, inset 0 0 4px #ffffff;
	width: 186px;
	height: 186px;
	border-radius: 50%;
	z-index: 10;
}

span.triangle.base {
	position: absolute;
	width: 0; 
	height: 0;
	margin: 46px 0 0 13px;
	border-left: 80px solid transparent;
	border-right: 80px solid transparent;				
	border-top: 140px solid #eeeeee;
	transform-origin: 50% 50%;
	z-index: 20;
}

span.triangle.no1 {
	position: absolute;
	margin: 46px 0 0 13px;
	width: 0; 
	height: 0; 
	border-left: 80px solid transparent;
	border-right: 80px solid transparent;				
	border-bottom: 140px solid #eeeeee;
	transform-origin: 0 100%;
	z-index: 20;
}

span.triangle.no2 {
	position: absolute;
	margin: 46px 0 0 13px;
	width: 0; 
	height: 0; 
	border-left: 80px solid transparent;
	border-right: 80px solid transparent;				
	border-bottom: 140px solid #eeeeee;
	transform-origin: 100% 100%;
	z-index: 20;
}

span.triangle.no3 {
	position: absolute;
	margin: 46px 0 0 13px;
	width: 0; 
	height: 0; 
	border-left: 80px solid transparent;
	border-right: 80px solid transparent;				
	border-bottom: 140px solid #eeeeee;
	transform-origin: 50% 100%;
	z-index: 20;
}

/* Animation */

.rotate {
	-webkit-animation: rotateTriangle 3s linear infinite;
	animation: rotateTriangle 3s linear infinite;
}

@-webkit-keyframes rotateTriangle {
	from { -webkit-transform: rotate(0deg); }
	to { -webkit-transform: rotate(60deg); }
}
@keyframes rotateTriangle {
	from { transform: rotate(0deg); }
	to { transform: rotate(60deg); }
}

.rotate:after {
	-webkit-animation: glowAnimation 3s ease infinite;
	animation: glowAnimation 3s ease infinite;
}

@-webkit-keyframes glowAnimation {		
	0% { box-shadow: 0 0 30px #ffffff, 0 0 10px #ffffff, 0 0 2px #ffffff, inset 0 0 2px #ffffff, inset 0 0 4px #ffffff; }
	10% { box-shadow: 0 0 80px #ffffff, 0 0 20px #ffffff, 0 0 2px #ffffff, inset 0 0 4px #ffffff, inset 0 0 8px #ffffff; }
	100% { box-shadow: 0 0 30px #ffffff, 0 0 10px #ffffff, 0 0 2px #ffffff, inset 0 0 2px #ffffff, inset 0 0 4px #ffffff; }
}
@keyframes glowAnimation {
	0% { box-shadow: 0 0 30px #ffffff, 0 0 10px #ffffff, 0 0 2px #ffffff, inset 0 0 2px #ffffff, inset 0 0 4px #ffffff; }
	10% { box-shadow: 0 0 80px #ffffff, 0 0 20px #ffffff, 0 0 2px #ffffff, inset 0 0 4px #ffffff, inset 0 0 8px #ffffff; }
	100% { box-shadow: 0 0 30px #ffffff, 0 0 10px #ffffff, 0 0 2px #ffffff, inset 0 0 2px #ffffff, inset 0 0 4px #ffffff; }
}

span.triangle.base {
	-webkit-animation: scaleTriangleBase 3s linear infinite;
	animation: scaleTriangleBase 3s linear infinite;
}

@-webkit-keyframes scaleTriangleBase {
	from { -webkit-transform: translate(0px,-11px) scale(0.5); }
	to { -webkit-transform: translate(0px,0px) scale(1); }
	}
@keyframes scaleTriangleBase {
	from { transform: translate(0px,-11px) scale(0.5); }
	to { transform: translate(0px,0px) scale(1); }
}

span.triangle.no1 {
	-webkit-animation: scaleTriangleOne 3s linear infinite;
	animation: scaleTriangleOne 3s linear infinite;
}

@-webkit-keyframes scaleTriangleOne {
	from { -webkit-transform: translate(0px,-46px) scale(0.5); }
	to { -webkit-transform: translate(-80px,0px) scale(0); }
}
@keyframes scaleTriangleOne {
	from { transform: translate(0px,-46px) scale(0.5); }
	to { transform: translate(-80px,0px) scale(0); }
}

span.triangle.no2 {
	-webkit-animation: scaleTriangleTwo 3s linear infinite;
	animation: scaleTriangleTwo 3s linear infinite;
}

@-webkit-keyframes scaleTriangleTwo {
	from { -webkit-transform: translate(0px,-46px) scale(0.5); }
	to { -webkit-transform: translate(80px,0px) scale(0); }
}
@keyframes scaleTriangleTwo {
	from { transform: translate(0px,-46px) scale(0.5); }
	to { transform: translate(80px,0px) scale(0); }
}

span.triangle.no3 {
	-webkit-animation: scaleTriangleThree 3s linear infinite;
	animation: scaleTriangleThree 3s linear infinite;
}

@-webkit-keyframes scaleTriangleThree {
	from { -webkit-transform: translate(0px,-116px) scale(0.5); }
	to { -webkit-transform: translate(0px,-280px) scale(0); }
}
@keyframes scaleTriangleThree {
	from { transform: translate(0px,-116px) scale(0.5); }
	to { transform: translate(0px,-280px) scale(0); }
}

在线预览    源码下载