有pull-right和pull-left类来对齐块元素。我想知道导航栏是否有相应的下拉式和下拉式?
<header id="navbar" role="banner" class="navbar navbar-fixed-top">
  <div class="navbar-inner">
    <div class="container">
      <!-- .btn-navbar is used as the toggle for collapsed navbar content -->
      <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </a>
      <a class="logo pull-left" href="/" title="Home">
        <img src="logo.png" alt="Home">
      </a>
      <div class="nav-collapse collapse">
        <nav role="navigation">
          <ul class="menu nav">
            <li>...</li>
          </ul>
        </nav>
      </div>
    </div>
  </div>
</header>
目标是将菜单 ( ul.nav) 与导航栏的底部对齐。
