html源码：
<div><div></div></div><div><div></div></div><div><div></div></div><div><div></div></div>
css源码：
<style type="text/css">*{margin:0;padding:0;}html,body{height:100%;}body{background:radial-gradient(ellipse at center,#34679a 0%, #214163 50%, #0d1926 100%);/*径向渐变 椭圆*/}body > div{width:200px;/*宽度 px像素 cm*/height:200px;/*高度*/border:1px #fff solid;/*边框 宽度 风格 颜色*/border-radius:50%;/*圆角*/position:absolute;top:15%;left:50%;margin-left:-101px;transform:rotateX(80deg) rotateY(20deg);transform-style:preserve-3d;}body > div:nth-of-type(2){transform:rotateX(-80deg) rotateY(20deg);}body > div:nth-of-type(3){transform:rotateX(-70deg) rotateY(60deg);}body > div:nth-of-type(4){transform:rotateX(70deg) rotateY(60deg);}body > div:first-of-type:after{width:40px;height:40px;content:"";background:#fff;position:absolute;top:50%;left:50%;margin-top:-20px;margin-left:-20px;transform:rotateX(80deg);border-radius:50%;animation:nucleus 2s infinite linear;}body > div > div{width:200px;height:200px;position:relative;transform-style:preserve-3d;animation:trail 1s infinite linear; /*自定义动画 动画名称 时间 播放次数 速度*/}body > div > div:after{content:"";width:5px;height:5px;background:#fff;position:absolute;top:-5px;left:50%;margin-left:-5px;border-radius:50%;box-shadow:0 0 12px #fff;/*阴影 x y 模糊度 颜色*/animation:particle 1s infinite linear;}/*自定义动画执行*/@keyframes trail{from{transform:rotateZ(0deg);}to{transform:rotateZ(360deg);}}@keyframes particle{from{transform:rotateX(90deg) rotateY(0deg);}to{transform:rotateX(90deg) rotateY(-360deg);}}@keyframes nucleus{0%{box-shadow:0 0 0 transparent;}50%{box-shadow:0 0 25px #fff;}100%{box-shadow:0 0 0 transparent;}}body > div:nth-of-type(2) > div,body > div:nth-of-type(2) > div:after{animation-delay:-0.5s;}body > div:nth-of-type(3) > div,body > div:nth-of-type(3) > div:after{animation-delay:-1s;}body > div:nth-of-type(4) > div,body > div:nth-of-type(4) > div:after{animation-delay:-1.5s;}</style>
