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废话不多说，上代码！
下面是两段CSS代码
lib.css
@charset ’utf-8’;
html {
width: 100%;
height: 100%;
}
body {
width: 100%;
height: 100%;
overflow: hidden;
background-image: -webkit-linear-gradient(90deg, #395ecb 0%, #3657be 35%, #242161 75%, #1a0531 100%);
background-image: -moz-linear-gradient(90deg, #395ecb 0%, #3657be 35%, #242161 75%, #1a0531 100%);
background-image: -ms-linear-gradient(90deg, #395ecb 0%, #3657be 35%, #242161 75%, #1a0531 100%);
background-image: linear-gradient(0deg, #395ecb 0%, #3657be 35%, #242161 75%, #1a0531 100%);
perspective: 1000px;
}
.bg0 {
width: 500px;
height: 500px;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: url(../images/bg0.png) no-repeat center center;
background-size: 150%;
}
.bg1 {
width: 100%;
height: 100%;
background: url(../images/bg1.png) no-repeat center center;
}
.hx-box {
top: 50%;
left: 50%;
width: 500px;
height: 500px;
transform-style: preserve-3d;
transform: translate(-50%, -50%) rotateY(75deg);
}
.hx-box ul {
width: 500px;
height: 500px;
transform-style: preserve-3d;
animation: hxz 20s linear infinite;
}
@keyframes hxz {
0% {
transform: rotateX(0deg);
}
100% {
transform: rotateX(-360deg);
}
}
.hx-box ul li {
width: 500px;
height: 500px;
border: 4px solid #5ec0ff;
border-radius: 1000px;
}
.hx-box ul li span {
display: block;
width: 100%;
height: 100%;
background: url(../images/hx.png) no-repeat center center;
background-size: 100% 100%;
animation: hx 4s linear infinite;
}
@keyframes hx {
to {
transform: rotate(360deg);
}
}
.hx-k2 {
transform: rotateX(60deg) rotateZ(60deg)
}
.hx-k3 {
transform: rotateX(-60deg) rotateZ(-60deg)
}
tabris.css
@charset ’utf-8’;article,aside,details,figcaption,figure,footer,header,hgroup,hr,main,menu,nav,section,summary{display:block}hr,img{border:0}pre,textarea{overflow:auto}hr,legend,td,th{padding:0}html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{color:#333;font-size:1em;line-height:1.42857143;font-family:Helvetica,’Hiragino Sans GB’,’Microsoft Yahei’,’微软雅黑’,Arial,sans-serif}body,form,h1,h2,h3,h4,h5,h6,ol,p,ul{margin:0}ol,ul{padding-left:0;list-style-type:none}h1,h2,h3,h4,h5,h6{font-size:1em;font-weight:400}a{text-decoration:none;background-color:transparent;color:inherit}a:active,a:hover{outline:0}li{list-style:none}audio,canvas,progress,video{display:inline-block;vertical-align:baseline}.vm,audio,canvas,iframe,img,svg,video{vertical-align:middle}audio:not([controls]){display:none;height:0}[hidden],template{display:none}abbr[title]{border-bottom:1px dotted}b,optgroup,strong{font-weight:700}dfn{font-style:italic}mark{background:#ff0;color:#000}small{font-size:80%}sup{top:-.5em}sub{bottom:-.25em}svg:not(:root){overflow:hidden}figure{margin:1em 40px}hr{height:1px;border-top:1px solid #ccc;margin:1em 0}code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}button,input,optgroup,select,textarea{color:inherit;font:inherit;margin:0}button{overflow:visible}button,select{text-transform:none}button,html input[type=button],input[type=reset],input[type=submit]{-webkit-appearance:button;cursor:pointer;}button[disabled],html input[disabled]{cursor:default}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}input{line-height:normal}input[type=checkbox],input[type=radio]{box-sizing:border-box;padding:0}input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{height:auto}input[type=search]{-webkit-appearance:textfield;box-sizing:content-box}input[type=search]::-webkit-search-cancel-button,input[type=search]::-webkit-search-decoration{-webkit-appearance:none}fieldset{border:1px solid silver;margin:0 2px;padding:.35em .625em .75em}legend{border:0}textarea{resize:vertical}table{border-collapse:collapse;border-spacing:0}::-moz-selection{background:#b3d4fc;text-shadow:none}::selection{background:#b3d4fc;text-shadow:none}.browserupgrade{margin:.2em 0;background:#ccc;color:#000;padding:.2em 0}.dv{border:0;clip:rect(0 0 0 0);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}.dv.dvv:active,.dv.dvv:focus{clip:auto;height:auto;margin:0;overflow:visible;position:static;width:auto}.dn{display:none}.db{display:block}.fix:after,.fix:before{content:" ";display:table}.fix:after{clear:both}.fl{float:left}.fr{float:right}.pr{position:relative}.pa,.pa0{position:absolute}.pa0{left:0;top:0}.oh{overflow:hidden}.wh{width:100%;height:100%}.bo{border:1px solid red}.mg{margin-left:auto;margin-right:auto}.tc{text-align: center;}.wp{margin:0 auto}*,:after,:before{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}
网站格式代码
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge,chrome=1">
<title>CSS3仿QQ浏览器官网彗星动画背景特效</title>
<meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />
<link rel="stylesheet" href="css/tabris.css">
<link rel="stylesheet" href="css/lib.css">
</head>
<body><script src="/demos/googlegg.js"></script>
<div class="bg0 pa">
<div></div>
</div>
<div class="hx-box pa">
<ul>
<li class="hx-k1 pa0">
<span></span>
</li>
<li class="hx-k2 pa0">
<span></span>
</li>
<li class="hx-k3 pa0">
<span></span>
</li>
</ul>
</div>
<div style="text-align:center;margin:50px 0; font:normal 14px/24px ’MicroSoft YaHei’;color:#ffffff">
<p>适用浏览器：360、FireFox、Chrome、Opera、傲游、搜狗、世界之窗. 不支持Safari、IE8及以下浏览器。</p>
<p>来源：<a href="http://www.aaa-cg.com.cn/xue/?lcc" target="_blank">素材</a></p>
</div>
</body>
</html>