当悬停到子菜单时，下拉边框底部消失
当我将鼠标悬停在我的下拉菜单的子菜单上时，样式边框底部消失了，当我将鼠标悬停在子菜单上时，我希望边框底部颜色保持在dropmenu。我会覆盖哪个元素？有人可以给我一些关于如何做的线索吗？
这是我将鼠标悬停在下拉菜单中的图片。
这是当我将鼠标悬停在子菜单时下拉菜单中的边框底部消失的图片。
这是我的HTML代码。
<!DOCTYPE html>
<html>
<head>
<title>Student Portal</title>
<link rel="stylesheet" href ="css/bootstrap.min.css">
<link rel="stylesheet" href="font-awesome/css/font-awesome.min.css">
<link href="style.css" rel ="stylesheet">
<link rel="shortcut icon" type="img/png" href="img/asd.png"/>
</head>
<body>
<div class ="top-bar-dark">
<div class="container">
<div class="row">
<div class="col-sm-4 col-xs-7">
<div class="top-bar-socials">
<a href="https://www.facebook.com/pages/Governor-Andres-Pascual-CollegeNavotas-City/344134628983014?fref=ts">
<i class="fa fa-facebook"></i>
</a>
<a href="https://twitter.com/official_gapc">
<i class="fa fa-twitter"></i>
</a>
<a href="https://www.linkedin.com/company/governor-andres-pascual-college-in-navotas-city">
<i class="fa fa-linkedin"></i>
</a>
</div>
</div>
<div class="col-sm-8 col-xs-5 text-right">
<ul class="list-inline top-dark-right">
<li class="hidden-sm hidden-xs"><i class="fa fa-envelope"></i> gapc_school@yahoo.com.ph</li>
<li class="hidden-sm hidden-xs"><i class="fa fa-phone"></i> (02) 282-9036</li>
<li><a href="#" class="login"><i class="fa fa-lock"></i> Login</a></li>
</ul>
</div>
</div>
</div>
</div>
<nav class="navbar navbar-default navbar-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#nav-collapse">
<span class="icon-bar" ></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<img class="img-responsive"src="images/brandz.png">
</div>
<div class="collapse navbar-collapse" id="nav-collapse">
<ul class="nav navbar-nav navbar-right">
<li class="active"><a href="#">Home</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">About us</a>
<ul class="dropdown-menu">
<li><a href="#">History</a></li>
<li><a href="#">Mission and Vision</a></li>
</ul>
<li><a href="#">Admissions</a></li>
<li><a href="#">Contact us</a></li>
<li><a href="#">Faculty Portal</a></li>
<!-- Modal -->
<div id="myModal" class="modal fade" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<img class ="modal-logo center-block" src="images/asd.png" >
</div>
<div class="modal-body">
<form role="form">
<div class="form-group">
<div class="input-group">
<div class="input-group-addon"><i class="glyphicon glyphicon-user"></i></div>
<input type="username" class="form-control" placeholder="Student No.">
</div>
</div>
<div class="form-group">
<div class="input-group">
<div class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></div>
<input type="password" class="form-control" placeholder="Password">
</div>
</div>
<div class="form-group">
<button type="button" class="btn btn-danger btn-sm btn-block">Log in</button>
</div>
</form>
</div>
</div>
</div>
</div>
</ul>
</div>
</div>
</nav>
<script src="js/jquery-1.12.4.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>
这是我的css。
.top-bar-dark {
background-color: #a92419;
}
.top-bar-light {
background-color: #f3f3f3;
}
.top-bar-light .top-dark-right li {
border-color: #ddd;
}
.top-bar-light .top-dark-right li a:hover {
color: #32c5d2;
}
.top-bar-socials {
line-height: 30px;
padding-top: 5px;
}
.top-bar-socials:after {
display: table;
clear: both;
content: "";
}
.top-bar-socials a {
margin: 0px 8px;
text-decoration: none;
font-size:18px;
color: #fff;
}
.top-dark-right {
margin: 0px;
padding: 0px;
}
.top-dark-right li {
line-height: 40px;
border-left: 1px solid #932015;
padding: 0px 10px;
}
.top-dark-right li, .top-dark-right li a {
color: #d7d7d7;
font-size: 12px;
}
.top-dark-right li i {
margin-right: 5px;
}
.top-dark-right li a:hover {
color: #fff;
}
a.login{
text-decoration: none;
}
.fa-facebook:hover{
color:#3b5998;
}
.fa-twitter:hover{
color:#1dcaff;
}
.fa-linkedin:hover{
color:#007bb5;
}
.navbar-default .navbar-nav > li > a {
font-weight: 590;
color: #949494;
display: block;
padding: 5px 35px 2px 45px;
border-bottom: 3px solid transparent;
line-height: 80px;
text-decoration: none;
transition: border-bottom-color 0.5s ease-in-out;
-webkit-transition: border-bottom-color 0.5s ease-in-out;
}
.nav.navbar-nav > li > a:hover, .nav.navbar-nav > li.active a{
color:#a92419;
border-bottom-color: #a92419;
}
.navbar-default .navbar-nav>.active>a, .navbar-default .navbar-nav>.active>a:focus, .navbar-default .navbar-nav>.active>a:hover {
color: #a92419;
background-color: white;
}
.navbar-default{
background-color:#fff;
margin: 0;
}
.nav>li>a {
position: relative;
}
.navbar-default .navbar-right > li > a {
padding: 0 30px;
margin-right:6px;
}
.navbar-default .navbar-toggle .icon-bar {
background-color: #000000;
margin:0 0 4px;
width: 25px;
height: 5px;
}
.nav.navbar-nav > li{
display: :inline-block;
}
.nav.navbar-nav{
list-style-type:none;
}
.nav.navbar-nav > li > a:hover{
color:#a92419;
border-bottom-color: #a92419;
}
.navbar-default .navbar-toggle .icon-bar {
background-color:#a92419 ;
margin:0 0 4px;
width: 25px;
height: 5px;
}
.navbar-default .navbar-toggle:focus, .navbar-default .navbar-toggle:hover{
background: none;
}
button.navbar-toggle{
background:none;
border:none;
color:#000;
margin: 0px;
}
.dropdown:hover .dropdown-menu {
display: block;
}
.dropdown-menu>li>a:hover {
color:#a92419;
border-bottom-color: #a92419;
}
.dropdown-menu>li>a {
display: block;
padding: 3px 20px;
clear: both;
font-weight: 400;
line-height: 3em;
color: #333;
white-space: nowrap;
}
2 个答案:
答案 0 :(得分：1)
问题是你在悬停时为标签添加了边框，所以当你将鼠标从标签上移开时（即当你将鼠标移到下拉框架上）时，a标签会丢失其悬停状态，因此边框会消失。
为下拉元素添加边框
.dropdown:hover .dropdown-menu {
display: block;
border-top: 3px solid #A92419;
top:80px
}
这是demo
答案 1 :(得分：1)
将以下代码添加到CSS中。请查看下面的代码段。
RedirectToAction("Index", "Home");<强>解释
.dropdown:hover a.dropdown-toggle {
border-bottom-color: #a92419;
}
包含所有链接（即 关于我们，历史，使命和愿景）。因此，将鼠标悬停在其中的任何链接上都会触发.dropdown事件。
我正在使用它突出显示相应的父链接。
<强>段：
.dropdown:hover.top-bar-dark {
background-color: #a92419;
}
.top-bar-light {
background-color: #f3f3f3;
}
.top-bar-light .top-dark-right li {
border-color: #ddd;
}
.top-bar-light .top-dark-right li a:hover {
color: #32c5d2;
}
.top-bar-socials {
line-height: 30px;
padding-top: 5px;
}
.top-bar-socials:after {
display: table;
clear: both;
content: "";
}
.top-bar-socials a {
margin: 0px 8px;
text-decoration: none;
font-size: 18px;
color: #fff;
}
.top-dark-right {
margin: 0px;
padding: 0px;
}
.top-dark-right li {
line-height: 40px;
border-left: 1px solid #932015;
padding: 0px 10px;
}
.top-dark-right li,
.top-dark-right li a {
color: #d7d7d7;
font-size: 12px;
}
.top-dark-right li i {
margin-right: 5px;
}
.top-dark-right li a:hover {
color: #fff;
}
a.login {
text-decoration: none;
}
.fa-facebook:hover {
color: #3b5998;
}
.fa-twitter:hover {
color: #1dcaff;
}
.fa-linkedin:hover {
color: #007bb5;
}
.navbar-default .navbar-nav > li > a {
font-weight: 590;
color: #949494;
display: block;
padding: 5px 35px 2px 45px;
border-bottom: 3px solid transparent;
line-height: 80px;
text-decoration: none;
transition: border-bottom-color 0.5s ease-in-out;
-webkit-transition: border-bottom-color 0.5s ease-in-out;
}
.nav.navbar-nav > li > a:hover,
.nav.navbar-nav > li.active a {
color: #a92419;
border-bottom-color: #a92419;
}
.navbar-default .navbar-nav>.active>a,
.navbar-default .navbar-nav>.active>a:focus,
.navbar-default .navbar-nav>.active>a:hover {
color: #a92419;
background-color: white;
}
.navbar-default {
background-color: #fff;
margin: 0;
}
.nav>li>a {
position: relative;
}
.navbar-default .navbar-right > li > a {
padding: 0 30px;
margin-right: 6px;
}
.navbar-default .navbar-toggle .icon-bar {
background-color: #000000;
margin: 0 0 4px;
width: 25px;
height: 5px;
}
.nav.navbar-nav > li {
display: : inline-block;
}
.nav.navbar-nav {
list-style-type: none;
}
.nav.navbar-nav > li > a:hover {
color: #a92419;
border-bottom-color: #a92419;
}
.navbar-default .navbar-toggle .icon-bar {
background-color: #a92419;
margin: 0 0 4px;
width: 25px;
height: 5px;
}
.navbar-default .navbar-toggle:focus,
.navbar-default .navbar-toggle:hover {
background: none;
}
button.navbar-toggle {
background: none;
border: none;
color: #000;
margin: 0px;
}
.dropdown:hover .dropdown-menu {
display: block;
}
.dropdown-menu>li>a:hover {
color: #a92419;
border-bottom-color: #a92419;
}
.dropdown-menu>li>a {
display: block;
padding: 3px 20px;
clear: both;
font-weight: 400;
line-height: 3em;
color: #333;
white-space: nowrap;
}
.dropdown:hover a.dropdown-toggle {
border-bottom-color: #a92419;
}
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