<nav class="nav-container d-md-none" id="nav">
        <ul class="container">
            <li><a href="###" class="nav-link">手机&amp;平板</a></li>
            <li><a href="###" class="nav-link">电视&amp;影音</a></li>
            <li><a href="###" class="nav-link">生活家电</a></li>
            <li><a href="###" class="nav-link">电脑/办公/存储</a></li>
            <li><a href="###" class="nav-link">网上商城</a></li>
        </ul>
    </nav>