<first-menu>
    <menu-item href="/clusters/anti-ddos" code="index">高防产品</menu-item>
    <menu-item href="/clusters/anti-ddos/instances" code="instance">高防实例</menu-item>
    <span class="item disabled">|</span>
    <menu-item href="/clusters/anti-ddos/networks" code="network">线路选项</menu-item>
    <menu-item href="/clusters/anti-ddos/periods" code="period">有效期选项</menu-item>
    <span class="item disabled">|</span>
    <menu-item href="/clusters/anti-ddos/user-instances" code="userPackage">用户实例</menu-item>
</first-menu>