《css揭秘》书中，滚动提示的实现
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Title</title>
<style>
ul {
display: inline-block;
overflow: auto;
7.2em;
height: 7em;
border: 1px solid silver;
padding: .3em .5em;
list-style: none;
margin-top: 2em;
font: 100 200%/1.6 'Frutiger LT Std', sans-serif;
background: linear-gradient(white 15px, hsla(0,0%,100%,0)) 0 0 / 100% 50px,
radial-gradient(at top, rgba(0,0,0,.2), transparent 70%) 0 0 / 100% 15px,
linear-gradient(to top, white 15px, hsla(0,0%,100%,0)) bottom / 100% 50px,
radial-gradient(at bottom, rgba(0,0,0,.2), transparent 70%) bottom / 100% 15px;
background-repeat: no-repeat;
background-attachment: local, scroll, local, scroll;
margin-top: 30px;
}
</style>
</head>
<body>
<ul>
<li>Ada Catlace</li>
<li>Alan Purring</li>
<li>Schrödingcat</li>
<li>Tim Purrners-Lee</li>
<li>WebKitty</li>
<li>Json</li>
<li>Void</li>
<li>Neko</li>
<li>NaN</li>
<li>Cat5</li>
<li>Vector</li>
</ul>
</body>
</html>