Html 如何更改导航栏文本后面背景的颜色和高度?
我想知道如何更改导航栏文本后面背景的颜色和高度?我知道我必须使用CSS。然而,我不确定我必须从html中选择什么类。这是我的名片 此外,我在下面列出了导航栏的HTML代码Html 如何更改导航栏文本后面背景的颜色和高度?,html,css,Html,Css,我想知道如何更改导航栏文本后面背景的颜色和高度?我知道我必须使用CSS。然而,我不确定我必须从html中选择什么类。这是我的名片 此外,我在下面列出了导航栏的HTML代码 <body> <nav class="navbar navbar-default"> <div class="container-fluid"> <!-- Brand and toggle get grouped
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#"><img src="http://placehold.it/60x60" alt="Your Brand Name"></a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li><a href="#">Home</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="true">About Me <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a>
</li>
<li><a href="#">Another action</a>
</li>
<li><a href="#">Something else here</a>
</li>
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a>
</li>
<li role="separator" class="divider"></li>
<li><a href="#">One more separated link</a>
</li>
</ul>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Units <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a>
</li>
<li><a href="#">Another action</a>
</li>
<li><a href="#">Something else here</a>
</li>
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a>
</li>
<li role="separator" class="divider"></li>
<li><a href="#">One more separated link</a>
</li>
</ul>
</li>
<li><a href="#">Clients</a>
</li>
<li><a href="#contact-me">Contact Me</a>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
下面是CSS代码。问题可能是样式表的引导方法吗
<style>
body {
margin: 0;
padding: 0;
}
navbar-header {
height: 15vh;
background-color: #4D5061;
}
nav ul {
list-style-type: none;
text-align: center;
}
nav ul li {
display: inline-block;
}
nav ul li a {
display: inline-block;
padding: 3.5vh 8px 4px;
color: white;
text-decoration: none;
font-size: 14pt;
font-family: 'Roboto', sans-serif;
}
nav ul li:after {
content: '';
position: absolute;
right: 50%;
bottom: 0;
left: 50%;
height: 3px;
background-color: red;
border-radius: 9px;
transition:all .2s;
}
nav ul li:hover:after {
right: 0;
left: 0;
}
a:hover {
color:red;
text-decoration:none;
}
#logo {
padding-top: 2vh;
padding-left: 20px;
float: left;
}
section {
position: relative;
}
.section1 {
height: 93vh;
background-color: #FFFFFF;
text-align: center;
}
.section2 {
height: 93vh;
background-color: #A59E8C;
text-align: center;
color: white;
}
.contact_section {
height: 93vh;
background-color: grey;
}
.logo {
color: #000000;
font-size: 200px;
}
.fa-angle-down {
color: #4D5061;
position: absolute;
bottom: 0px;
}
footer {
height: 10vh;
}
</style>
亲切问候,,
Liam.您可以使用“.navbar span”选择器,它应该应用于导航栏内的所有span标记 如果您只想选择一个特定的span标记,那么可以在我上面为您要修改的span标记的类名编写的选择器中更改“span” 让我知道它是否有效。navbar.navbar-default将使用您现有的标记和足够的特殊性来覆盖引导的默认样式
.navbar.navbar-default {
background: red;
min-height: 200px;
}
我们需要你的css和一个代码片段或小提琴,如果你可以更新后。我会使用“.navbar.navbar默认”当我改变导航栏文本的颜色?