pc页面改为响应式布局宽度问题

    <meta name="viewport" content="width=device-width, initial-scale=1">

        .content {
            box-sizing: content-box;
            margin: 0 auto;
            width: 800px;
            padding: 40px 0;
            text-align: center;
            font-size: 16px;
        }