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<!DOCTYPE html>
<html>
<head>
<style> 
#myDIV
{
text-decoration:underline;
animation:mymove 5s infinite;
}
@keyframes mymove
{
50% {-moz-text-decoration-color:red;}
}
</style>
</head>
<body>
<p>逐渐地把下划线的颜色从黑色变为红色，再从红色变回黑色：<p>
<div id="myDIV">
<p>这是一个段落。</p>
</div>
<p>在 CSS 中，text-decoration-color 属性是 <em>可动画化（animatable）</em> 的。</p>
<p><b>注意：</b>几乎所有的主流浏览器都不支持 text-decoration-color 属性。</p>
<p><b>注意：</b>Firefox 支持另一个可替代该属性的属性，即 -moz-text-decoration-color 属性。</p>
<p>Internet Explorer 10、Firefox 和 Opera 支持 CSS 动画。</p>
<p>Safari 和 Chrome 通过带有前缀 -webkit-，支持 CSS 动画。</p>
</body>
</html>
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