如何在网格中设置我的显示器宽度的50%？

<div class="grid-container">
  <!-- 网格项 -->
  <div class="grid-item">内容1</div>
  <div class="grid-item">内容2</div>
</div>

.grid-container {
  display: grid;
}

.grid-container {
  display: grid;
  grid-template-columns: 50% 50%;
}

<style>
.grid-container {
  display: grid;
  grid-template-columns: 50% 50%;
}

.grid-item {
  border: 1px solid black;
  padding: 10px;
}
</style>

<div class="grid-container">
  <div class="grid-item">内容1</div>
  <div class="grid-item">内容2</div>
</div>