div折角~~~

代码：

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>折角效果</title>

<style type="text/css">

    div {

        width: 300px;

        height: 200px;

        background: #333;

        position: relative;

    }

    div:before {

        content: '';

        width: 0px;

        height: 0px;

        position: absolute;

        top: 0px;

        right: 0px;

        border-right: 0px solid #333;

        border-bottom: 0px solid #768;

        border-bottom-width: 30px;

        border-right-width: 30px;

    }

</style>

</head>

<body>

<div></div>

</body>

</html>

巴特西

div折角~~~

代码：

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