html - 粘性导航显示在叠加层上方

Question

我的页面左侧有一个垂直的粘性导航，还有一个带有下拉菜单的顶部标题，当其中一个项目被下拉时，当我有时，棒式导航显示在下拉列表的顶部z-index: 0，当我更改z-index: -1然后导航显示在下拉列表下，但链接不再可点击。

我尝试将z-indexof更改.sub-content为非常高的值，但它仍然显示在顶部。

我该怎么做才能使粘性导航显示在叠加层下方，但仍然可以点击项目？

这是相关的CSS：

nav.right>ul {
  overflow: auto;
  list-style: none;
  margin-left: 0;
  padding-left: 0;
  height: calc(100vh - 80px);
  position: sticky;
  z-index: 0;
  top: 60px;
}

可点击，但显示在叠加层上方z-index: 0：

nav.right>ul {
  overflow: auto;
  list-style: none;
  margin-left: 0;
  padding-left: 0;
  height: calc(100vh - 80px);
  position: sticky;
  z-index: 0;
  top: 60px;
}

a { color: skyblue; }

main {
  display: flex;
  margin: auto;
}

main>nav {
  width: 20%;
}

main {
  width: 80%;
  padding-left: 20px;
}

.sub-content>div>ul {
  list-style-type: none;
}

.sub-content {
  position: absolute;
  left: 0;
  right: 0;
  padding: 0;
  display: none;
  background: #292929;
  padding: 5vh 0;
}

.sub-content>div:first-child {
  width: 25vw;
  position: relative;
  left: 0;
  right: 0;
  margin: auto;
}

nav.top>ul>li:hover>.sub-content {
  display: block;
}

.sub-content>div>ul>li>a {
  color: #ffffff;
  padding: 5px 10px;
  font-size: 0.9rem;
  text-decoration: none;
  display: block;
}

.sub-content>div>ul>li>a:hover {
  /* background: #ee2012; */
  text-decoration: underline;
}

nav.top {
  background: #f44336;
  display: flex;
  flex-direction: row;
  justify-content: center;
  position: sticky;
  top: 0;
}

nav.top>ul {
  margin: 0;
  display: flex;
  flex-direction: row;
  list-style-type: none;
}

nav.top>ul>li>a {
  display: inline-block;
  padding: 1rem 1.5rem;
  color: #ffffff;
  text-decoration: none;
}

nav.top>ul>li>a:hover,
nav.top>ul>li>a.router-link-exact-active {
  background: #ee2012;
}

<nav class="top">
  <ul>
    <li>
      <a href="">Item</a>
      <div class="sub-content">
        <div>
          <ul>
            <li><a href="">Sub Item</a></li>
            <li><a href="">Sub Item</a></li>
          </ul>
        </div>
      </div>
    </li>
  </ul>
</nav>

<main>
  <nav class="right">
    <ul>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
    </ul>
  </nav>
  <div class="content">
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
  </div>
</main>

不可点击，但显示在叠加层下z-index: -1：

nav.right>ul {
  overflow: auto;
  list-style: none;
  margin-left: 0;
  padding-left: 0;
  height: calc(100vh - 80px);
  position: sticky;
  z-index: -1;
  top: 60px;
}

a { color: skyblue; }

main {
  display: flex;
  margin: auto;
}

main>nav {
  width: 20%;
}

main {
  width: 80%;
  padding-left: 20px;
}

.sub-content>div>ul {
  list-style-type: none;
}

.sub-content {
  position: absolute;
  left: 0;
  right: 0;
  padding: 0;
  display: none;
  background: #292929;
  padding: 5vh 0;
}

.sub-content>div:first-child {
  width: 25vw;
  position: relative;
  left: 0;
  right: 0;
  margin: auto;
}

nav.top>ul>li:hover>.sub-content {
  display: block;
}

.sub-content>div>ul>li>a {
  color: #ffffff;
  padding: 5px 10px;
  font-size: 0.9rem;
  text-decoration: none;
  display: block;
}

.sub-content>div>ul>li>a:hover {
  /* background: #ee2012; */
  text-decoration: underline;
}

nav.top {
  background: #f44336;
  display: flex;
  flex-direction: row;
  justify-content: center;
  position: sticky;
  top: 0;
}

nav.top>ul {
  margin: 0;
  display: flex;
  flex-direction: row;
  list-style-type: none;
}

nav.top>ul>li>a {
  display: inline-block;
  padding: 1rem 1.5rem;
  color: #ffffff;
  text-decoration: none;
}

nav.top>ul>li>a:hover,
nav.top>ul>li>a.router-link-exact-active {
  background: #ee2012;
}

<nav class="top">
  <ul>
    <li>
      <a href="">Item</a>
      <div class="sub-content">
        <div>
          <ul>
            <li><a href="">Sub Item</a></li>
            <li><a href="">Sub Item</a></li>
          </ul>
        </div>
      </div>
    </li>
  </ul>
</nav>

<main>
  <nav class="right">
    <ul>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
      <li><a href="">Abc</a></li>
    </ul>
  </nav>
  <div class="content">
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
    <p>Dummy Text</p>
  </div>
</main>

标签： htmlcss