nav?class="navbar-default"?role="navigation"> ???????<div?class="container-fluid"> ?????????<div?class="navbar-header?navbar-rights"> ???????????<a?class="navbar-brand"?href="#home">首頁</a> ?????????</div> ???????<div> ?????????????<!--向右對(duì)齊--> ???????????<ul?class="nav?navbar-nav?navbar-right"> ?????????????<li?class="dropdown"> ?????????????????<a?href="#life"?class="dropdown-toggle"?data-toggle="dropdown"> ?????????????????????生活 ?????????????????????<b?class="caret"></b> ?????????????????</a> ?????????????????<ul?class="dropdown-menu"> ?????????????????????<li><a?href="#volunteer">公益</a></li> ?????????????????????<li><a?href="#art">美術(shù)</a></li> ?????????????????????<li><a?href="#reading">讀書</a></li> ?????????????????????<li><a?href="#music">音樂</a></li> ?????????????????????<li><a?href="#skating">花滑</a></li> ?????????????????</ul> ?????????????</li> ?????????????<li><a?href="#study"><span></span>學(xué)習(xí)</a></li> ?????????????<li><a?href="#work"><span></span>工作</a></li> ?????????????<li><a?href="#more"><span></span>更多</a></li> ???????????</ul>.icon-bar{border:?1px?solid?#fff;} .navbar{background:?#d9534f;} .navbar?.navbar-brand?.navbar?.navbar-brand:hover{color:?#fff;} #navbar?li?a{color:?#fff;} #navbar?li.active?a{background:#fff;color:?#d9534f;font-weight:?bold} #navbar?li.dropdown?.dropdown-toggle{background:?#d9534f;} #navbar?li.dropdown?.dropdown-menu{background:?#d9534f;} #navbar?li.dropdown?.dropdown-menu?li?a:hover{background:?#900;}我向上面這樣寫了，而且css文件放在了bootstrap引入文件之后引入，還是無法覆蓋bootstrap的導(dǎo)航欄，不知道為什么會(huì)這樣？