css3漏斗型Loading加载动画

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以下是 css3漏斗型Loading加载动画的示例演示效果:

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部分效果截图:

HTML代码(index.html):

<!DOCTYPE html>
<html>

<head>
  <meta charset="gb2312">
  <title>css3©����Loading���ض���</title>
    <style>
* {
  margin: 0px;
  padding: 0px;
  border: 0px;
}

html, body {
  min-height: 100%;
}

body {
  background: radial-gradient(#eeeeee, #444444);
}

.loader {
  position: absolute;
  top: 0px;
  bottom: 0px;
  left: 0px;
  right: 0px;
  margin: auto;
  width: 175px;
  height: 100px;
}
.loader span {
  display: block;
  background: #ccc;
  width: 7px;
  height: 10%;
  border-radius: 14px;
  margin-right: 5px;
  float: left;
  margin-top: 25%;
}
.loader span:last-child {
  margin-right: 0px;
}
.loader span:nth-child(1) {
  animation: load 2.5s 1.4s infinite linear;
}
.loader span:nth-child(2) {
  animation: load 2.5s 1.2s infinite linear;
}
.loader span:nth-child(3) {
  animation: load 2.5s 1s infinite linear;
}
.loader span:nth-child(4) {
  animation: load 2.5s 0.8s infinite linear;
}
.loader span:nth-child(5) {
  animation: load 2.5s 0.6s infinite linear;
}
.loader span:nth-child(6) {
  animation: load 2.5s 0.4s infinite linear;
}
.loader span:nth-child(7) {
  animation: load 2.5s 0.2s infinite linear;
}
.loader span:nth-child(8) {
  animation: load 2.5s 0s infinite linear;
}
.loader span:nth-child(9) {
  animation: load 2.5s 0.2s infinite linear;
}
.loader span:nth-child(10) {
  animation: load 2.5s 0.4s infinite linear;
}
.loader span:nth-child(11) {
  animation: load 2.5s 0.6s infinite linear;
}
.loader span:nth-child(12) {
  animation: load 2.5s 0.8s infinite linear;
}
.loader span:nth-child(13) {
  animation: load 2.5s 1s infinite linear;
}
.loader span:nth-child(14) {
  animation: load 2.5s 1.2s infinite linear;
}
.loader span:nth-child(15) {
  animation: load 2.5s 1.4s infinite linear;
}

@keyframes load {
  0% {
    background: #ccc;
    margin-top: 25%;
    height: 10%;
  }

  50% {
    background: #444;
    height: 100%;
    margin-top: 0%;
  }

  100% {
    background: #ccc;
    height: 10%;
    margin-top: 25%;
  }
}

</style>

  <script src="js/prefixfree.min.js"></script>

</head>

<body>

  <div class="loader">
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
</div>
</body>
</html>

CSS代码(style.css):

*{margin:0px;padding:0px;border:0px;}
html,body{min-height:100%;}
body{background:radial-gradient(#eeeeee,#444444);}
.loader{position:absolute;top:0px;bottom:0px;left:0px;right:0px;margin:auto;width:175px;height:100px;}
.loader span{display:block;background:#ccc;width:7px;height:10%;border-radius:14px;margin-right:5px;float:left;margin-top:25%;}
.loader span:last-child{margin-right:0px;}
.loader span:nth-child(1){animation:load 2.5s 1.4s infinite linear;}
.loader span:nth-child(2){animation:load 2.5s 1.2s infinite linear;}
.loader span:nth-child(3){animation:load 2.5s 1s infinite linear;}
.loader span:nth-child(4){animation:load 2.5s 0.8s infinite linear;}
.loader span:nth-child(5){animation:load 2.5s 0.6s infinite linear;}
.loader span:nth-child(6){animation:load 2.5s 0.4s infinite linear;}
.loader span:nth-child(7){animation:load 2.5s 0.2s infinite linear;}
.loader span:nth-child(8){animation:load 2.5s 0s infinite linear;}
.loader span:nth-child(9){animation:load 2.5s 0.2s infinite linear;}
.loader span:nth-child(10){animation:load 2.5s 0.4s infinite linear;}
.loader span:nth-child(11){animation:load 2.5s 0.6s infinite linear;}
.loader span:nth-child(12){animation:load 2.5s 0.8s infinite linear;}
.loader span:nth-child(13){animation:load 2.5s 1s infinite linear;}
.loader span:nth-child(14){animation:load 2.5s 1.2s infinite linear;}
.loader span:nth-child(15){animation:load 2.5s 1.4s infinite linear;}
@keyframes load{0%{background:#ccc;margin-top:25%;height:10%;}
50%{background:#444;height:100%;margin-top:0%;}
100%{background:#ccc;height:10%;margin-top:25%;}
}

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