呼如林
添加以下 CSS:.nav > li > a:focus, .nav > li > a:hover{ background: transparent !important;}var Deb = [];$.noConflict();jQuery(document).ready(function($) { Deb.push(document.location);});/*add*/.nav>li>a:focus,.nav>li>a:hover { background: transparent!important;}body { margin: 0; padding: 0; font: 400 14px/24px 'Open Sans', sans-serif;}#header { float: left; width: 100%; position: relative;}.head-top { float: left; width: 100%; position: fixed; background: red; z-index: 999;}#nav { padding: 0; margin: 16px 0 0 0; list-style: none;}#nav li { display: inline-block; float: none; position: relative; padding: 0 0 20px 0;}#nav .active { background: transparent;}#nav li a { font: 400 14px/14px 'Lato', sans-serif; color: #000; text-transform: uppercase; text-decoration: none; padding: 0 20px; display: block; position: relative; z-index: 20;}#nav li:hover>a { background: none;}#nav li ul li a:hover,#nav li ul li:hover>a { text-decoration: none;}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script><link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" /><link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap-theme.min.css" rel="stylesheet" /><header id="header"> <section class="head-top"> <div class="container"> <div class="row"> <div class="col-md-6"> <div class="left-side"> <h1>sandeep</h1> </div> </div> <div class="col-md-6"> <div class="right-side"> <nav class="navbar "> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> </div> <div id="navbar" class="collapse navbar-collapse"> <ul class="nav navbar-nav" id="nav"> <li class="active"><a href="#" data-tab='main'>Home</a></li> <li><a href="#aboutus" data-tab="aboutus">About</a></li> <li><a href="#gallery" data-tab="gallery">Gallery </a></li> <li><a href="#career" data-tab="career">career</a></li> </ul> </div> </nav> </div> </div> </div> </div> </section></header>