【发布时间】：2018-04-16 16:53:09
【问题描述】：
当导航栏在 Chrome 上处于正常无响应模式（我不确定这是否是正确的术语）并且您向下滚动时，当您向下滚动时，徽标图像仍会保留在菜单后面。但是，当屏幕宽度缩小并且菜单折叠并单击图标以展开菜单时，它会将徽标图像向下推。在移动设备上查看时，我希望该徽标图像保留在菜单后面。
我想我以后会有一些我确实想被推倒的内容，但是这个标志我不想被推倒。我可以让它成为我正在使用的背景的一部分，但我认为如果我可以将它保留为单独的图像来显示它会更好。
https://jsfiddle.net/martonian/Ljd5v3ty/
CSS
#logo {
width: 50%;
margin: 80px auto;
}
.topnav {
background-image: url(http://www.buffettworld.com/images/navmenubg.png);
background-size: 100%;
font-family: 'Pathway Gothic One', sans-serif;
margin-top: 10px;
position: fixed;
top: 0;
width: 100%;
}
.topnav a {
float: left;
display: block;
color: white;
text-align: center;
padding: 14px 25px;
text-decoration: none;
font-size: 21px;
}
.topnav .icon {
display: none;
}
.dropdown {
float: left;
overflow: hidden;
}
.dropdown .dropbtn {
font-size: 21px;
border: none;
outline: none;
color: white;
padding: 14px 25px;
background-color: inherit;
font-family: inherit;
margin: 0;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}
.dropdown-content a {
float: none;
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
text-align: left;
}
.topnav a:hover, .dropdown:hover .dropbtn {
background-color: #b1d235;
color: white;
}
.dropdown-content a:hover {
background-color: #ddd;
color: black;
}
.dropdown:hover .dropdown-content {
display: block;
}
@media screen and (max-width: 600px) {
.topnav a:not(:first-child), .dropdown .dropbtn {
display: none;
}
.topnav a.icon {
float: right;
display: block;
}
}
@media screen and (max-width: 600px) {
.topnav.responsive {position: relative;}
.topnav.responsive .icon {
position: absolute;
right: 0;
top: 0;
}
.topnav.responsive a {
float: none;
display: block;
text-align: left;
}
.topnav.responsive .dropdown {float: none;}
.topnav.responsive .dropdown-content {position: relative;}
.topnav.responsive .dropdown .dropbtn {
display: block;
width: 100%;
text-align: left;
}
}
.sticky {
position: fixed;
top: 10px;
width: 100%
}
HTML
<div class="topnav" id="myTopnav">
<a href="#home">HOME</a>
<a href="#news">NEWS</a>
<a href="#news">TOUR</a>
<div class="dropdown">
<button class="dropbtn">JIMMY
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<a href="#">BIOGRAPHY</a>
<a href="#">AVIATION</a>
<a href="#">INCIDENTS</a>
<a href="#">BUSINESS EMPIRE</a>
<a href="#">CONTACT JIMMY</a>
</div>
</div>
<div class="dropdown">
<button class="dropbtn">MUSIC
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<a href="#">ALBUMS</a>
<a href="#">SONGS</a>
<a href="#">CHART HISTORY</a>
<a href="#">TRIBUTE BANDS</a>
</div>
</div>
<a href="#about">SET LISTS</a>
<a href="#about">ABOUT</a>
<a href="#about">ADVERTISE</a>
<a href="#about">CONTACT</a>
<a href="javascript:void(0);" style="font-size:15px;" class="icon" onclick="myFunction()">☰</a>
</div>
<script>
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}
</script>
<div id="logo">
<img src="http://www.buffettworld.com/images/logo.png">
</div>
【问题讨论】：