<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
ul1{list-style-type:disc;}
ul2{list-style-image:url(图片/红毛怪.jpg);
.li1{list-style-image:url(浮动演示\初始状态.jpg);}
.li2{list-style-image:url(浮动演示/红色到顶.jpg);}
.li3{list-style-image:url(浮动演示/蓝色到顶.jpg);}
</style>
</head>
<body>
<ul1>
<li>11</li>
<li>11</li>
<li>11</li>
</ul1>
<ul2>
<li>22</li>
<li>22</li>
<li>22</li>
</ul2>
<ul3>
<li class="l1">33</li>
<li class="l2">33</li>
<li class="l3">33</li>
</ul3>
</body>
</html>
class中类名和style中类名不匹配
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
ul1{list-style-type:disc;}
ul2{list-style-image:url(图片/红毛怪.jpg);
.li1{list-style-image:url(浮动演示\初始状态.jpg);}
.li2{list-style-image:url(浮动演示/红色到顶.jpg);}
.li3{list-style-image:url(浮动演示/蓝色到顶.jpg);}
</style>
</head>
<body>
<ul1>
<li>11</li>
<li>11</li>
<li>11</li>
</ul1>
<ul2>
<li>22</li>
<li>22</li>
<li>22</li>
</ul2>
<ul3>
<li class="li1">33</li>
<li class="li2">33</li>
<li class="li3">33</li>
</ul3>
</body>
</html>
请把项目目录发出来，还有/与\是我看错了？
li的class名改成 style中对应的类名就行了