这节的代码我打出来怎么不见效果呢？
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>title</title>
<style type="text/css">
line-tri{
width: 150px; height: 30px;
padding: 15px 0;
border-top: 30px solid;
border-bottom: 30px solid;
background-color: currentColor;
background-clip: content-box;
}
</style>
</head>
<body>
<div class="line-tri"></div>
</body>
</html>
