纯CSS3打造非常炫的加载动画

 <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>

 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); }
}