小编K. *_*ith的帖子

#top {
  position: sticky;
  top: 0;
  border: 1px solid red;
  width: 100%;
}

.container {
  display: grid;
  grid-gap: 50px;
  grid-template-columns: max-content 1fr;
  margin-top: 50px;
  margin-left: auto;
  margin-right: auto;
  max-width: 900px;
}

.sidebar {
  border: 1px solid blue;
  position: sticky;
  top: 0;
}

.content {
  border: 1px solid green;
}

<div id="top">
  sticky header
</div>
<div class="container">
  <div class="sidebar">
    sticky sidebar
  </div>
  <div class="content">
    <p>
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