【list_style_image】
<html>
<head>
<style>
ul {list-style-image: url("http://placehold.it/20x20");}
li {marker-offset:20px;}
</style>
</head>
<body>
<ul>
<li>This example illustrates using an image for a bullet point.</li>
<li>This example illustrates using an image for a bullet point.</li>
<li>This example illustrates using an image for a bullet point.</li>
</ul>
</body>
</html>
