<style>
div{
width:100px;
height:100px;
border:1px solid red;
border-radius:100px;
position:absolute;
}
#df{
background-color:red;
animation:mymove 1s infinite;
-webkit-animation:mymove 2s infinite;
}
@keyframes mymove
{
from {opacity:0;}
to {opacity:1;}
}
@-webkit-keyframes mymove /*Safari and Chrome*/
{
from {opacity:none;}
to {opacity:block;}
}
</style>
</head>
<body>
<div id="df"></div>
</body>
如何给span标签画一个圆
.content-box .ac{
cursor: pointer;
padding:0px 9px;
border-radius:50%;
/* width:100px;
height:100px;*/
border:1px solid red;
/*position:absolute;*/
background-color:red;
animation:mymove 1s infinite;
-webkit-animation:mymove 1s infinite;
}
原文：https://www.cnblogs.com/psxiao/p/11401283.html