美好的一天！每当我盘旋时，上方都有一个空间。如果你看看jsfiddle，你会发现并非所有人都在盘旋。它看起来不太好。我试图将margin-top:0放入.show-menu，但它不起作用。必须在我的代码中添加什么或更改？所有帮助将不胜感激。
https://jsfiddle.net/view02/jfcboyw3/1/
a:hover, a:visited, a:link, a:active {
text-decoration: none;
color: white;
}
#wrap {
max-width: 100%; /* Spans the width of the page */
height: 40px;
/* margin-left:50px;
margin-right: 50px;*/
margin: 0 auto; /* Ensures there is no space between sides of the screen and the menu */
z-index: 99; /* Makes sure that your menu remains on top of other page elements */
position: relative;
background-color: #D00000;
text-align: center;
display: flex;
justify-content: center;
padding-top: 14px;
}
/*#wrap ul li:hover a:hover { background-color:black; height: 40px;
}*/
ul {
list-style-type: none;
margin: 0;
padding: 0;
position: absolute;
}
/*Create a horizontal list with spacing*/
ul li {
display: inline-block;
/* margin-left: 90px;*/
margin-top: -5px;
margin-right: 1px;
height: 100%;
}
/*Style for menu links*/
li a {
display: block;
min-width: 140px;
height: 40px;
text-align: center;
line-height: 50px;
font: bold 2.00vw Helvetica, Sans-Serif;
color: #fff;
background: #d00000;
text-decoration: none;
line-height: 20px;
}
/*Hover state for top level links*/
ul li:hover a {
background-color: black;
height: 40px;
bottom: 10px;
top: -105%;
display: block;
}
/*Style for dropdown links*/
li:hover ul a {
background: #d00000;
color: white;
height: 40px;
line-height: 40px;
}
/*Hover state for dropdown links*/
li:hover ul a:hover {
background: black;
color: #fff;
}
/*Hide dropdown links until they are needed*/
li ul {
display: none;
}
/*Make dropdown links vertical*/
li ul li {
display: block;
float: none;
}
/*Prevent text wrapping*/
li ul li a {
width: auto;
min-width: 100px;
padding: 0 20px;
}
/*Display the dropdown on hover*/
ul li a:hover + .hidden, .hidden:hover {
display: block;
}
/*Style 'show menu' label button and hide it by default*/
.show-menu {
font: bold 2.00vw Helvetica, Sans-Serif;
text-decoration: none;
color: #fff;
background: #d00000;
text-align: center;
padding-top: 10 px;
margin-top: 0;
display: none;
}
/*Hide checkbox*/
input[type=checkbox] {
display: none;
}
/*Show menu when invisible checkbox is checked*/
input[type=checkbox]:checked ~ #menu {
display: block;
}
/*Responsive Styles*/
@media screen and (max-width : 760px) {
/*Make dropdown links appear inline*/
ul {
position: static;
display: none;
}
/*Create vertical spacing*/
li {
margin-bottom: 1px;
}
/*Make all menu links full width*/
ul li, li a {
width: 100%;
}
/*Display 'show menu' link*/
.show-menu {
display: block;
}
}
ul li { margin-top:-1px;}<div id="wrap">
<label for="show-menu" class="show-menu">Show Menu</label>
<input type="checkbox" id="show-menu" role="button">
<ul id="menu">
<li class="selected"><a href="home.html">Home</a></li>
<li>
<a href="#">Cars</a>
<ul class="hidden">
<li><a href="cars.html">Categories</a></li>
<li><a href="faqs.html">FAQs</a></li>
</ul>
</li>
<li><a href="about.html">About</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</div>
答案 0 :(得分：0)
与您的ul类相关：
ul {
list-style-type: none;
margin: 0;
padding: 0;
position: absolute;
top: 0;
}
添加top：0，它将修复
#wrap还有padding-top：14px;如果你不想要任何空间，可以是0。
答案 1 :(得分：0)
从#wrap移除顶部填充并调整line-height代码的a
a:hover, a:visited, a:link, a:active {
text-decoration: none;
color: white;
}
#wrap {
max-width: 100%; /* Spans the width of the page */
height: 40px;
/* margin-left:50px;
margin-right: 50px;*/
margin: 0 auto; /* Ensures there is no space between sides of the screen and the menu */
z-index: 99; /* Makes sure that your menu remains on top of other page elements */
position: relative;
background-color: #D00000;
text-align: center;
display:flex;
justify-content: center;
/*padding-top:14px;*/
}
/*#wrap ul li:hover a:hover { background-color:black; height: 40px;
}*/
ul {
list-style-type:none;
margin:0;
padding:0;
position: absolute;
}
/*Create a horizontal list with spacing*/
ul li {
display:inline-block;
margin:0px !important;
height:100%;
}
/*Style for menu links*/
li a {
display:block;
min-width:140px;
height: 40px;
text-align: center;
font: bold 2.00vw Helvetica, Sans-Serif;
color: #fff;
background: #d00000;
text-decoration: none;
line-height: 38px;
}
/*Hover state for top level links*/
ul li:hover a{
background-color: black;
height: 40px;
bottom:10px;
top:-105%;
display: block;
}
/*Style for dropdown links*/
li:hover ul a {
background: #d00000;
color: white;
height: 40px;
line-height: 40px;
}
/*Hover state for dropdown links*/
li:hover ul a:hover {
background: black;
color: #fff;
}
/*Hide dropdown links until they are needed*/
li ul {
display: none;
}
/*Make dropdown links vertical*/
li ul li {
display: block;
float: none;
}
/*Prevent text wrapping*/
li ul li a {
width: auto;
min-width: 100px;
padding: 0 20px;
}
/*Display the dropdown on hover*/
ul li a:hover + .hidden, .hidden:hover {
display: block;
}
/*Style 'show menu' label button and hide it by default*/
.show-menu {
font: bold 2.00vw Helvetica, Sans-Serif;
text-decoration: none;
color: #fff;
background: #d00000;
text-align: center;
padding-top: 10 px;
margin-top: 0;
display: none;
}
/*Hide checkbox*/
input[type=checkbox]{
display: none;
}
/*Show menu when invisible checkbox is checked*/
input[type=checkbox]:checked ~ #menu{
display: block;
}
/*Responsive Styles*/
@media screen and (max-width : 760px){
/*Make dropdown links appear inline*/
ul {
position: static;
display: none;
}
/*Create vertical spacing*/
li {
margin-bottom: 1px;
}
/*Make all menu links full width*/
ul li, li a {
width: 100%;
}
/*Display 'show menu' link*/
.show-menu {
display:block;
}
}<div id="wrap">
<label for="show-menu" class="show-menu">Show Menu</label>
<input type="checkbox" id="show-menu" role="button">
<ul id="menu">
<li class="selected"><a href="home.html">Home</a></li>
<li>
<a href="#">Cars</a>
<ul class="hidden">
<li><a href="cars.html">Categories</a></li>
<li><a href="faqs.html">FAQs</a></li>
</ul>
</li>
<li><a href="about.html">About</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</div>