<ul class="nav-menu">
    <li class="lis" data-key="home">
        <a href="/" target="_self" class="mbsub1s">홈 </a>
    <ul class="nav-menu">
        <li class="lis" data-key="news">
            <a href="/news" target="_self" class="mbsub1s">뉴스 </a>
        <ul class="nav-menu">
            <li class="lis" data-key="latest">
                <a href="/news/latest" target="_self" class="mbsub1s">최신 뉴스 </a>
            </li>
        </ul>
        </li>
    </ul>
    </li>
    <li class="lis" data-key="about">
        <a href="/about" target="_self" class="mbsub1s">회사 소개 </a>
    </li>
</ul>