极客观点
项目管理
HarmonyOS
源代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>简单展示特效</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
list-style: none;
}
.demo{
margin: 0 auto;
width: 930px;
}
.demo ul li{
float: left;
position: relative;
width: 300px;
margin-right: 6px;
}
.demo ul li img {
position: relative;
border: none;
z-index: 22;
}
.demo ul li a{
display: block;
width: 300px;
border: 2px solid #ccc;
}
.demo ul li a:hover{
border: 2px solid #c03;
}
.demo ul li a span{
position: absolute;
z-index: 33;
bottom: 2px;
left: 2px;
width: 300px;
height: 40px;
opacity: 0.5;
background: #000;
color: #fff;
line-height: 40px;
text-align: left;
display: none;
}
.demo ul li a:hover span{
display: block;
}
</style></head>
<body>
<div class="demo">
<ul>
<li>
<a href="http://mooc.com">
<img src="images/1.jpg">
<span>学会html5 绝对屌丝逆袭</span>
</a>
</li>
<li>
<a href="http://mooc.com">
<img src="images/2.jpg">
<span>圆角水晶按钮制作</span>
</a>
</li>
<li>
<a href="http://mooc.com">
<img src="images/3.jpg">
<span>8小时助你攻下html与css样式代码</span>
</a>
</li>
</ul>
</div>
</body>
</html>
为什么底部有留白？
可以设置 img的 border属性 或者设置img 的display:block