1.用CSS3实现带小三角形的div框(代码如下：)
2.截图：
3、代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>CSS制作小三角形</title>
<style>
.row-k{
width: 300px;
height: 250px;
border:1px solid #eee;
box-shadow:0px 1px 3px 1px #eee;
border-radius: 4px;
margin: 50px;
text-align: center;
border: 1px solid #eee;
position: relative;
}
.row-k::before{
content: "";
position: absolute;
left: 95px;
top: -56px;
width: 10px;
height: 10px;
margin: 50px;
transform: rotate(45deg);
background: #fff;
z-index: 0;
border-top: 2px solid #eee;
border-left: 2px solid #eee;
}
</style>
</head>
<body>
<div class="row-k">
<p><h3>静夜思</h3></p>`
<p style="font-size:14px;">(唐)李白</p>
<p>床前明月光</p>
<p>疑是地上霜</p>
<p>举头望明月</p>
<p>低头思故乡</p>
</div>
</body>
</html>
