css3加载中

.loader {
  margin: 6em auto;
  font-size: 10px;
  position: relative;
  text-indent: -9999em;
  border-top: 1.1em solid rgba(255, 255, 255, 0.2);
  border-right: 1.1em solid rgba(255, 255, 255, 0.2);
  border-bottom: 1.1em solid rgba(255, 255, 255, 0.2);
  border-left: 1.1em solid #ffffff;
  -webkit-animation: load8 1.1s infinite linear;
  animation: load8 1.1s infinite linear;
}
.loader,
.loader:after {
  border-radius: 50%;
   10em;
  height: 10em;
}
@-webkit-keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

 html：

<div class="load-container load8">
      <div class="loader">加载中...</div>
      <a href="#load8">< 源代码 ></a>
</div>