css制作响应式侧边栏效果

<div class="sidebar">
  <ul>
    <li><a href="#">首页</a></li>
    <li><a href="#">关于</a></li>
    <li><a href="#">服务</a></li>
    <li><a href="#">联系</a></li>
  </ul>
</div>
<p><div class="main-content">
<h1>欢迎来到网站</h1>
<p>这里是主要内容区域。</p>
</div></p>

.sidebar {
  width: 250px;
  height: 100vh;
  background-color: #333;
  color: white;
  position: fixed;
  top: 0;
  left: 0;
  padding-top: 20px;
}
<p>.sidebar ul {
list-style: none;
padding: 0;
}</p><p>.sidebar a {
display: block;
color: white;
text-decoration: none;
padding: 15px 20px;
font-family: Arial, sans-serif;
}</p><p>.sidebar a:hover {
background-color: #555;
}</p><p>.main-content {
margin-left: 250px;
padding: 20px;
min-height: 100vh;
}</p>

.menu-toggle {
  display: none;
}
<p>.menu-btn {
display: none;
font-size: 24px;
cursor: pointer;
position: fixed;
top: 10px;
left: 10px;
z-index: 999;
background: #333;
color: white;
width: 40px;
height: 40px;
text-align: center;
line-height: 40px;
border-radius: 5px;
}</p><p>@media (max-width: 768px) {
.menu-toggle {
display: none;
}</p><p>.menu-btn {
display: block;
}</p><p>.sidebar {
transform: translateX(-100%);
transition: transform 0.3s ease;
z-index: 998;
}</p><p>.main-content {
margin-left: 0;
}</p><p>/<em> 当复选框被勾选时显示侧边栏 </em>/
.menu-toggle:checked + .menu-btn + .sidebar {
transform: translateX(0);
}
}</p>