我想将鼠标悬停在 Logo 上时将 Logo 设为下拉图像，但没有成功，请您帮忙吗？
dropdown {
position: relative;
display: inline-block;
}
dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
}
desc {
padding: 15px;
text-align: center;
}
dropdown:hover dropdown-content {
display: block;
}<!DOCTYPE html>
<html lang="ro">
<head>
<title>Evolutia sistemelor de operare Windows</title>
<meta charset="utf-8">
</head>
<body>
<div class="dropdown">
<img src="winlogo.png" alt="Windows Logo" width="100" height="50">
<div class="dropdown-content">
<img src="winlogo.png" alt="Windows Logo" width="300" height="200">
<div class="desc">Microsoft's OS Logo since Windows 8</div>
</div>
</div>
</body>
</html>我是 CSS 的新手，我的第一个元素必须包含图像上的悬停，我提到我需要使用 mystyle.css 中的 css，而不是使用 <style>在索引页内。
最佳答案
您在 CSS 中错过了类规则的点，应该是 .classname
.dropdown {
position: relative;
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
}
.desc {
padding: 15px;
text-align: center;
}
.dropdown:hover .dropdown-content {
display: block;
}<!DOCTYPE html>
<html lang="ro">
<head>
<title>Evolutia sistemelor de operare Windows</title>
<meta charset="utf-8">
</head>
<body>
<div class="dropdown">
<img src="winlogo.png" alt="Windows Logo" width="100" height="50">
<div class="dropdown-content">
<img src="winlogo.png" alt="Windows Logo" width="300" height="200">
<div class="desc">Microsoft's OS Logo since Windows 8</div>
</div>
</div>
</body>
</html>关于html - 图片悬停时的 CSS 下拉菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39981992/