认真读一下题目可以慢慢获取到信息，它说“虽然类名为‘inner’的盒子里设置了“left: 10px”属性，所以呢，先给inner设置一个left: 10px;的属性，在慢慢根据题目要求完成就OKK啦

<html>
    <head>
        <meta charset=utf-8>
        <style type="text/css">
            * {
                margin: 0;
                padding: 0;
            }
            .outer {
                width: 100px;
                height: 100px;
                background-color: black;
                position: relative;
            }
            .inner {
                width: 80px;
                height: 80px;
                left: 10px;
                background-color: red;
                position: inherit;
            }
        </style>
    </head>
    <body>
    	<section class="outer">
            <section class="inner">
                
            </section>
        </section>
    </body>
</html>