HTML - CSS |同时具有固定的垂直菜单和固定的水平菜单

<div class="vertical-menu">
  <a href="#">菜单项1</a>
  <a href="#">菜单项2</a>
  <a href="#">菜单项3</a>
</div>

.vertical-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 200px;
  background-color: #f1f1f1;
}

.vertical-menu a {
  display: block;
  padding: 12px;
  text-decoration: none;
  color: #000;
}

.vertical-menu a:hover {
  background-color: #ccc;
}

<div class="horizontal-menu">
  <a href="#">菜单项1</a>
  <a href="#">菜单项2</a>
  <a href="#">菜单项3</a>
</div>

.horizontal-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: #f1f1f1;
}

.horizontal-menu a {
  display: inline-block;
  padding: 12px;
  text-decoration: none;
  color: #000;
}

.horizontal-menu a:hover {
  background-color: #ccc;
}