在移动设备中查看时，引导菜单完全显示

Question

提前非常感谢！我是一名平面设计师，使用SIMA引导模板。我没有成功联系模板的作者。除了在移动设备上查看网站时，导航菜单完全显示外，一切都是犹太洁食。用户必须手动单击导航选项卡才能隐藏菜单(可用性差(。我搜索了类似的问题，发现我有正确的元视图标签，我的导航类和 id 似乎都在那里。指向我的网站的链接位于 www.thesunkenweb.com/loteksystems 指向作者网站的链接(具有相同的结果(https://readytheme.net/item/sima-one-page-multipage-template/网页摘要：

<!-- Start Header Section -->
<header class="main_menu_sec navbar navbar-default navbar-fixed-top">
<div class="container">
<div class="row">
<div class="col-lg-3 col-md-3 col-sm-12">
<div class="lft_hd">
<a href="index.html"><img src="http://www.thesunkenweb.com/loteksystems/img/LotekSystemsLogo_1.png" alt="Lotek Systems"/></a>
</div>
</div>          
<div class="col-lg-9 col-md-9 col-sm-12">
<div class="rgt_hd">                    
<div class="main_menu">
<nav id="nav_menu">
<button aria-controls="navbar" aria-expanded="false" data-target="#navbar" data-toggle="collapse" class="navbar-toggle collapsed" type="button">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>   
<div id="navbar">
<ul>
<li><a class="page-scroll" href="index.html">Home</a></li> 
<li><a class="page-scroll" href="#abt_sec">About Us<i class="fa fa-angle-down"></i></a>
<ul>
<li><a class="page-scroll" href="#tm_sec">Meet Andy</a></li>
<li><a class="page-scroll" href="#tstm_sec">Testimonials</a></li>
<li><a class="page-scroll" href="#clt_sec">Experience</a></li>
</ul>
</li>                       
<li><a class="page-scroll" href="#pr_sec">Services<i class="fa fa-angle-down"></i></a>
<ul>
<li><a class="page-scroll" href="CustomCloudManagement.html">Custom Managed Cloud Hosting</a></li>
<li><a class="page-scroll" href="CloudMigration.html">Cloud Migration</a></li>
<li><a class="page-scroll" href="ApplicationManagement.html">Application Management</a></li>
<li><a class="page-scroll" href="ComputerRepairs.html">Computer Repairs</a></li>
</ul>
</li>
<li><a class="page-scroll" href="#ctn_sec">Contact Us</a></li>
</ul>
</div>      
</nav>          
</div>                          
</div>
</div>  
</div>  
</div>  
</header>
<!-- End Header Section -->

Answer 1

@media (max-width:767px){
#navbar{display:none}
}

添加这个，一切都将是犹太洁食 ☺