怎样用最简单的html+css代码制作一颗跳动的心？

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>心</title>

<style>

* {
margin:0;
padding: 0;
}
body {
background-color: #000;
}
h2 {
width: 220px;
margin: 20px auto;
color: #f00;
}
.heart {
width: 200px;
height: 200px;
position: relative;
margin:0 auto;
top:30px;
animation: heart 0.5s 0s infinite;
}
.left, .right {
width: 200px;
height: 200px;
background: #FA8383;
border-radius: 100px 100px 0 0;
position: absolute;
box-shadow: 0px 0px 50px #FA8383;
}
.bottom {
width: 200px;
height: 200px;
background: #FA8383;
position: absolute;
box-shadow:0px 0px 50px #FA8383;
transform: translate(0,64px) rotate(45deg) scale(0.9,0.9);
}
.left {
transform: translate(-50px,0) rotate(-45deg);
}
.right {
transform: translate(50px,0) rotate(45deg);
}
/*定义动画*/
@keyframes heart {
from {
transform:scale(1,1);
}
to {
transform:scale(1.5,1.5);
}
}

</style>

</head>
<body>
<h2>扑通扑通的小心心</h2>
<div class="heart">
<div class="left"></div>
<div class="right"></div>
<div class="bottom"></div>
</div>
</body>
</html>

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