那些看起来像引导类，因此我想您可能需要从navbar-nav中删除填充和/或边距.

Those look like bootstrap classes, so I would say you likely need to remove padding and/or margins from navbar-nav.

您可以通过向其添加自己的类并使用该类来添加替代样式来实现.例如:

You can do this by adding your own class to it and using that to add overriding styles. For example:

CSS :

.navbar-nav.navbar-nospace {
  margin: 0px;
  padding: 0px;
}

HTML :

<ul class="nav navbar-nav navbar-nospace">