我现在正在用html和css（没有js）制作汉堡菜单，并且：checked + .something无法正常工作。我正在寻找约3个小时的解决方案，但找不到任何解决方案。如果您能帮助我，那将是很好。
也许我在某个地方弄乱了，因为我从视频中观看了它，但是我做了和他完全一样的事情，但是我没有用:(
这是代码：
* {
margin: 0;
padding: 0;
}
body {
background-color: teal;
}
.navigations {
right: 0;
z-index: 10;
display: block;
position: fixed;
top: 15px;
padding-bottom: 20px;
padding-left: 25px;
padding-right: 150px;
border-radius: 50px 10px 10px 50px;
background: rgba(0, 0, 0, 0.5);
}
.navigations div {
display: inline-block;
font-size: 25px;
}
.navigations a {
text-decoration: none;
color: white;
}
.burger {
z-index: 100;
position: fixed;
right: 25px;
display: block;
top: 25px;
cursor: pointer;
}
.burger div {
width: 45px;
height: 5px;
background-color: white;
margin: 12px;
border-radius: 10px;
}
#toggle {
display: none;
position: fixed;
}
#toggle:checked+.navigations {
display: none;
}<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale = 1.0">
<link rel="stylesheet" type="text/css" href="something.css">
</head>
<body>
<div class="navigations">
<div class="nav">
<a href="">About us</a>
</div>
<div class="nav">
<a href="">Tours</a>
</div>
<div class="nav">
<a href="">Contacts</a>
</div>
</div>
<label for="toggle">
<div class="burger">
<div class="burgerelem"></div>
<div class="burgerelem"></div>
<div class="burgerelem"></div>
</div>
</label>
</body>
</html>最佳答案
看来您实际上缺少了checkbox元素。由于使用的是adjacent sibling selector（+中的#toggle:checked + .navigations），因此应将带有.navigations div的复选框放在#toggle输入之前。
* {
margin: 0;
padding: 0;
}
body {
background-color: teal;
}
.navigations {
right: 0;
z-index: 10;
display: block;
position: fixed;
top: 15px;
padding-bottom: 20px;
padding-left: 25px;
padding-right: 150px;
border-radius: 50px 10px 10px 50px;
background: rgba(0, 0, 0, 0.5);
}
.navigations div {
display: inline-block;
font-size: 25px;
}
.navigations a {
text-decoration: none;
color: white;
}
.burger {
z-index: 100;
position: fixed;
right: 25px;
display: block;
top: 25px;
cursor: pointer;
}
.burger div {
width: 45px;
height: 5px;
background-color: white;
margin: 12px;
border-radius: 10px;
}
#toggle {
display: none;
position: fixed;
}
/*
Since the .navigations is the next sibling element after #toggle,
the + selector works here
*/
#toggle:checked+.navigations {
display: none;
}<input type="checkbox" id="toggle" /> <!-- Add this! -->
<div class="navigations">
<div class="nav">
<a href="">About us</a>
</div>
<div class="nav">
<a href="">Tours</a>
</div>
<div class="nav">
<a href="">Contacts</a>
</div>
</div>
<label for="toggle">
<div class="burger">
<div class="burgerelem"></div>
<div class="burgerelem"></div>
<div class="burgerelem"></div>
</div>
</label>