twitter-bootstrap - 什么元素负责垂直居中菜单项

Question

我去了 twitter bootstrap 主页并复制粘贴了下面的菜单：

.navbar.navbar-inverse.navbar-fixed-top
  .navbar-inner
    .container / I tried 'margin: 0 auto;' since nav is a display block item but with no luck 
      %button.btn.btn-navbar{"data-target" => ".nav-collapse", "data-toggle" => "collapse", :type => "button"}
        %span.icon-bar
        %span.icon-bar
        %span.icon-bar
      %a.brand{:href => "./index.html"} Bootstrap
      .nav-collapse.collapse
        %ul.nav
          %li.active
            %a{:href => "./index.html"} Home
          %li
            %a{:href => "./getting-started.html"} Get started
          %li
            %a{:href => "./scaffolding.html"} Scaffolding
          %li
            %a{:href => "./base-css.html"} Base CSS
          %li
            %a{:href => "./components.html"} Components
          %li
            %a{:href => "./javascript.html"} JavaScript
          %li
            %a{:href => "./customize.html"} Customize

但！我的项目没有像他们的那样居中，我尝试使用 safari 开发人员工具，但没有任何运气！

哪个元素负责垂直居中项目？

在此处输入图像描述