请查看以下代码并告诉我它是否有错误。即使我从＃menu-icon中删除“隐藏”，它也不会显示navicon的图像。很抱歉发布了整个但我只是想确保我没有写出我不应该写的东西。
@import 'https://fonts.googleapis.com/css?family=Alegreya+Sans';
*{
margin: 0;
padding: 0;
border: 0;
}
body {
background-color: #F5F5F5;
color: #67727A;
font-family: 'Alegreya', sans-serif;
margin: 0;
}
h2 {
font-size: 250%;
font-weight: 700;
text-align: center;
padding-top: 2%;
color: #F5F5F5;
}
h3 {
font-size: 175%;
line-height: 155%;
padding: 5% 0;
font-weight: 400;
color: #F5F5F5;
}
p {
font-family: 'Alegreya sans', sans-serif;
color: #F5F5F5;
font-size: 160%;
line-height: 150%;
padding: 3%;
text-indent: 2%;
text-align: justify;
}
img {
max-width: 100%;
height: auto;
width: auto;
margin: -4px;
}
header {
background-color: #6991AC;
width: 100%;
height: 86px;
}
#header-inner {
max-width: 1200px;
margin: 0 auto;
}
#logo {
margin: 20px;
float: left;
width: 200px;
height: 60px;
background: url(img/RD.png) no-repeat center;
}
/*-- Start Navigation --*/
nav {
float: right;
padding: 25px 20px 0 0;
}
#menu-icon {
display: hidden;
width: 40px;
weight: 40px;
background: url(img/nav.png) center;
}
a:hover#menu-icon {
border-radius: 4px 4px 0 0;
}
ul {
list-style-type: none;
}
nav ul li {
font-family: 'Alegreya Sans', sans-serif;
font-size: 150%;
display: inline-block;
float: left;
padding: 10px;
}
nav ul li a {
color: #f5f5f5;
text-decoration: none;
}
nav ul li a:hover {
color: #C3D7DF;
}
.current {
color:#C3D7DF;
}
/*-- End Navigation --*/
.banner {
width: 100%;
background-color: #6991AC;
}
.banner-inner {
max-width: 1100px;
margin: 0 auto;
}
.one-fourth {
width: 25%;
float: left;
text-align: center;
}
#html {
background-color: #F1AA90;
}
#css{
background-color: #BEB9AD;
}
#seo {
background-color: #AADCD2;
}
#social {
background-color: #A2B2C1;
}
.one-fourth i {
color: #F0F0F0;
font-size: 500%;
padding: 13% 0 4% 0;
}
.inner-wrapper {
float: left;
width: 100%;
background-color: #C3D7DF;
}
article {
float: left;
margin: 0 auto;
width: 50%;
height: auto;
}
#tablet {
background-color: #C3D7DF;
}
aside {
float: right;
margin: 0 auto;
width: 50%;
height: auto;
}
#tablet2 {
background-color: #A2B1C1;
}
#mobile {
background-color: #BEB9AD;
}
#desktop {
background-color: #F1AA90;
}
.inner-wrapper-2 {
float: left;
width: 100%;
background-color: #C3D7DF;
}
.inner-wrapper-3 {
float: left;
width: 100%;
background-color: #AADCD2;
}
.one-third {
width: 33.333333%;
float: left;
text-align: center;
}
#google {
background-color: #A2B1C1;
}
#marketing {
background-color: #BEB9AD;
}
#customers {
background-color: #AADCD2;
}
#smiley {
background-color: #AADCD2;
padding: 0 0 1%;
clear: both;
}
/*-- Start Footer ---*/
footer {
background-color: #6991AC;
width: 100%;
}
.social {
list-style-type: none;
text-align: center;
}
.social li {
display: inline;
}
.social i {
font-size: 460%;
margin: 1%;
padding: 5% 5% 5% 4%;
color: #C3D7DF;
}
.social i:hover {
color: #F5F5F5;
}
footer.second {
border-top: 1px solid #AADCD2;
background-color: #544B59;
max-height: 55px;
text-align: center;
margin: 0;
}
footer.second p {
padding: 5px 0 9px 0;
text-align: center;
}
/*====== MEDIA ========*/
@media screen and (max-width: 760px) {
h2 {
font-size: 150%;
}
h3 {
font-size: 125%;
}
p {
font-size: 120%;
}
header {
position: absolute;
}
#logo {
margine: 15px 0 20px -25px;
background: url(img/RD_mobile.png) no-repeat center;
}
#menu-icon {
display: inline-block;
}
nav ul, nav:active ul {
display: none;
z-index: 1000;
position: absolute;
padding: 20px;
background: #6991AC;
right: 20px;
top: 60px;
border: 1px solid #FFF;
border-radius: 2px 0 2px 2px;
width: 50%;
}
nav:hover ul {
display: block;
}
nav li {
text-align: center;
width: 100%;
padding: 10px 0;
}
.banner {
padding-top: 86px;
}
.one-fourth {
float: left;
width: 100%;
}
.one-fourth i {
font-size: 350%;
padding: 4% 0 1% 0;
}
article {
width: 100%;
}
aside {
width: 100%;
}
.hand-mobile {
display: none;
}
.one-third {
width: 100%;
}
.social i {
font-size: 180%;
}
} <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Rocket Design - Mobile Web Design Services</title>
<link rel="stylesheet" type="text/css" href="style.css" />
<link href="css/font-awesome.min.css" rel="stylesheet"/>
<link rel="shortcut icon" type="image/png" href="img/favicon.png"/>
</head>
<body>
<header>
<div id="header-inner">
<a href="index.html" id="logo"></a>
<nav>
<a href="#" id="menu-icon"></a>
<ul>
<li><a href="index.html" class="current">Home</a></li>
<li><a href="#">Skills</a></li>
<li><a href="#">Portofolio</a></li>
<li><a href="#">Our Team</a></li>
<li><a href="#">Contact</a></li>
</ul>
</nav>
</div>
</header>
<!--End Header-->
<section class="banner">
<div class="banner-inner">
<img src="img/rocket_design.png">
</div>
</section>
<!--End Banner-->
<section class="one-fourth" id="html">
<td><i class="fa fa-html5"></i></td>
<h3>HTML</h3>
</section>
<section class="one-fourth" id="css">
<td><i class="fa fa-css3"></i></td>
<h3>CSS</h3>
</section>
<section class="one-fourth" id="seo">
<td><i class="fa fa-search"></i></td>
<h3>SEO</h3>
</section>
<section class="one-fourth" id="social">
<td><i class="fa fa-users"></i></td>
<h3>SOCIAL</h3>
</section>
<!--End Four Column Section-->
<section class="inner-wrapper">
<article id="tablet">
<img src="img/hand_ipad.png">
</article>
<aside id="tablet2">
<h2>MOBILE. TABLET. DESKTOP.</h2>
<p>A tablet computer, commonly shortened to tablet, is a thin, flat mobile computer with a touchscreen display, which is usually in color, processing circuitry, and a rechargeable battery in a single device. Tablets often come equipped with sensors, including digital cameras, a microphone, and an accelerometer, so that images on screens are always displayed upright.</p>
</aside>
</section>
<section class="inner-wrapper-2">
<article id="mobile">
<h2>ACROSS EACH DEVICE</h2>
<p>A tablet computer, commonly shortened to tablet, is a thin, flat mobile computer with a touchscreen display, which is usually in color, processing circuitry, and a rechargeable battery in a single device. Tablets often come equipped with sensors, including digital cameras, a microphone, and an accelerometer, so that images on screens are always displayed upright.</p>
</article>
<aside class="hand-mobile">
<img src="img/hand_mobile.png">
</aside>
</section>
<section class="inner-wrapper">
<article>
<img src="img/desktop.png">
</article>
<aside id="desktop">
<p>A tablet computer, commonly shortened to tablet, is a thin, flat mobile computer with a touchscreen display, which is usually in color, processing circuitry, and a rechargeable battery in a single device. Tablets often come equipped with sensors, including digital cameras, a microphone, and an accelerometer, so that images on screens are always displayed upright.</p>
</aside>
</section>
<!--End Main Two Column Section-->
<section class="inner-wrapper-3">
<section class="one-third" id="google">
<h3>GOOGLE SEARCH</h3>
<p>A tablet computer, commonly shortened to tablet, is a thin, flat mobile computer with a touchscreen display, which is usually in color, processing circuitry, and a rechargeable battery in a single device.</p>
</section>
<section class="one-third" id="marketing">
<h3>MARKETING</h3>
<p>A tablet computer, commonly shortened to tablet, is a thin, flat mobile computer with a touchscreen display, which is usually in color, processing circuitry, and a rechargeable battery in a single device.</p>
</section>
<section class="one-third" id="customers">
<h3>HAPPY CUSTOMOERS</h3>
<p>A tablet computer, commonly shortened to tablet, is a thin, flat mobile computer with a touchscreen display, which is usually in color, processing circuitry, and a rechargeable battery in a single device.</p>
</section>
</section>
<!--End Three Column Section-->
<section id="smiley">
<h2>: )</h2>
</section>
<!--End Smiley Face-->
<footer>
<ul class="social">
<li><a href="#" target="_blank"><i class="fa fa-facebook"></i></a></li>
<li><a href="#" target="_blank"><i class="fa fa-google-plus"></i></a></li>
<li><a href="#" target="_blank"><i class="fa fa-twitter"></i></a></li>
<li><a href="#" target="_blank"><i class="fa fa-youtube"></i></a></li>
<li><a href="#" target="_blank"><i class="fa fa-instagram"></i></a></li>
</ul>
</footer>
<!--End Footer-->
<footer class="second">
<p>© Rocket Design</p>
</footer>
<!--End Second Footer-->
</body>
</html>
答案 0 :(得分：0)
首先，display: hidden不存在。
如果没有可用的代码示例或链接到网站，我只能猜测您想要实现的目标，但这可能会有效：
#menu-icon:hover {
border-radius: 4px 4px 0 0;
}
答案 1 :(得分：0)
这里有几个问题。
您的菜单图标是锚标记。由于锚标记为空，因此默认情况下无需呈现任何内容。您需要设置宽度和高度，以便有一个用于渲染背景的区域。
在你的CSS中，你设置了'weight'而不是'height'。
此外，您需要使用display:none代替display:hidden
更改的css看起来像：
#menu-icon {
display:none;
height: 60px;
width: 60px;
}
答案 2 :(得分：0)
你的CSS中的一个简单错误。而不是<!DOCTYPE html>
<html>
<body>
<script>
if (!user) {
<h1> there is no user </h1>
} </script>
if (user) {
<button type="button">Click Me!</button>
} </script>
</body>
</html>
，它必须是weight: 40px;
height: 40px答案 3 :(得分：0)
您不需要background-image来创建菜单。使您的<nav>成为灵活容器＆amp;将您的#menu-icon修改为三个<div>。请查看更新的 Codepen 。
<a href="#" class="ham-menu"></a>
<a href="#" class="ham-menu"></a>
<a href="#" class="ham-menu"></a>
并给他们CSS规则（在SASS中）：
nav {
display: flex;
flex-direction: column;
&:hover {
border-radius: 0;
cursor: pointer;
}
.ham-menu {
height: 5px;
margin-top: 5px;
background: #fff !important;
@media screen and (min-width: 760px) {
display: none;
}
&:hover {
border-radius: 0 !important;
}
}
}