<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<meta name="Keywords" content="关键字,关键词">
<meta name="Description" content="描述和简介">
<title>Title</title>
<style type="text/css">
*{margin:0;padding:0;}
body,ul,li,ol,dl,dd,p,h1,h2,h3,h4,h5,h6{ margin:0;}
a{text-decoration:none;color: inherit;}
img{display: block;border:none;}
ol,ul{list-style:none;}
.clearfix:after {content: "";display: block;clear: both;}
.fl{ float: left;}
.fr{ float: right;}
html{
height: 100%;
background: -webkit-radial-gradient(center,#153170,#000);
}
.heart{ position: relative; width: 300px; height: 300px; margin: 200px auto;transform: rotate(45deg);
animation: move 2s infinite alternate ;}
.heart div{ position: absolute; width: 200px; height: 200px; background: red;}
.heart .middle{ right: 0; bottom: 0; width: 200px; height: 200px;}
.heart .left{ left: 0; bottom: 0; border-radius: 50%;}
.heart .right{ top: 0; right: 0;border-radius: 50%;}
.heart p{ width: 200px; height: 30px; font: bold 25px/30px "";text-align:center; color: #fff;}
.heart p{ position: absolute; right: 0; bottom: 85px; transform: rotate(-45deg);}
@-webkit-keyframes move{
10%{ transform: rotate(45deg) scale(1.1); text-shadow: 0 0 5px #fff; }
20%{ transform: rotate(45deg) scale(1.2); text-shadow: 0 0 5px #fff; }
30%{ transform: rotate(45deg) scale(1.3); text-shadow: 0 0 5px #fff; }
40%{ transform: rotate(45deg) scale(1.2); text-shadow: 0 0 5px #fff; }
50%{ transform: rotate(45deg) scale(1.3); text-shadow: 0 0 5px #fff; }
60%{ transform: rotate(45deg) scale(1.2); text-shadow: 0 0 5px #fff; }
70%{ transform: rotate(45deg) scale(1.3); text-shadow: 0 0 5px #fff; }
80%{ transform: rotate(45deg) scale(1.2); text-shadow: 0 0 10px #fff;}
90%{ transform: rotate(45deg) scale(1.1); text-shadow: 0 0 5px #fff; }
}
</style>
</head>
<body>
<div class="heart">
<div class="left"></div>
<div class="middle"></div>
<div class="right"></div>
<p>I Love You</p>
</div>
</body>
</html>
效果图: