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mb5fe94bcc59f7e 2016-03-30 17:00:00

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.wrap { width: 64px; height: 64px; position: relative; }
.outer { position: absolute; width: 100%; height: 100%; background: url(icon-spin-s.png) no-repeat; animation: spin 800ms infinite linear; }
.inner, .inner2 { position: absolute; width: 38px; height: 38px; border-radius: 40px; overflow: hidden; left: 13px; top: 13px; }
.inner { opacity: 1; background-color: #89abdd; animation: second-half-hide 1.6s steps(1, end) infinite; }
.inner2 { opacity: 0; background-color: #4b86db; animation: second-half-show 1.6s steps(1, end) infinite; }
.spiner, .filler, .masker { position: absolute; width: 50%; height: 100%; }
.spiner { border-radius: 40px 0 0 40px; background-color: #4b86db; transform-origin: right center; animation: spin 800ms infinite linear; left: 0; top: 0; }
.filler { border-radius: 0 40px 40px 0; background-color: #4b86db; animation: second-half-hide 800ms steps(1, end) infinite; left: 50%; top: 0; opacity: 1; }
.masker { border-radius: 40px 0 0 40px; background-color: #89abdd; animation: second-half-show 800ms steps(1, end) infinite; left: 0; top: 0; opacity: 0; }

.inner2 .spiner, .inner2 .filler { background-color: #89abdd; }
.inner2 .masker { background-color: #4b86db; }

@keyframes spin {
  0%   { transform: rotate(360deg); }
  100% { transform: rotate(0deg); }
}
@keyframes second-half-hide {
  0%        { opacity: 1; }
  50%, 100% { opacity: 0; }
}
@keyframes second-half-show {
  0%        { opacity: 0; }
  50%,