css3-呼吸灯

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<div class="breathe-btn"></div>
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.breathe-btn {
position: relative;
width: 100px;
height: 10px;
margin-top: 20px;
line-height: 40px;
border: 1px solid #2b92d4;
border-radius: 5px;
color: #fff;
font-size: 20px;
text-align: center;
cursor: pointer;
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
overflow: hidden;
background-image: -webkit-gradient(
linear,
left top,
left bottom,
from(#6cc3fe),
to(#21a1d0)
);
-webkit-animation-timing-function: ease-in-out;
-webkit-animation-name: breathe;
-webkit-animation-duration: 2700ms;
-webkit-animation-iteration-count: infinite;
-webkit-animation-direction: alternate;
}
@-webkit-keyframes breathe {
0% {
opacity: 0.2;
box-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);
}
100% {
opacity: 1;
border: 1px solid rgba(59, 235, 235, 1);
box-shadow: 0 1px 30px rgba(59, 255, 255, 1);
}
}