如何解决全屏后视频被导航条覆盖的问题

.video-container {
  position: relative;
  z-index: 9999;
}

// 进入全屏播放时隐藏导航条
function enterFullscreen() {
  document.getElementById('navigation').style.display = 'none';
}

// 退出全屏播放时显示导航条
function exitFullscreen() {
  document.getElementById('navigation').style.display = 'block';
}

.navigation {
  position: sticky;
  top: 0;
}

<div class="container">
  <div class="video-container">
    <!-- 视频内容 -->
  </div>
  <div class="navigation">
    <!-- 导航条内容 -->
  </div>
</div>

<style>
.container {
  display: flex;
  flex-direction: column;
}

.video-container {
  flex: 1;
}

.navigation {
  flex: 0;
}
</style>