网格间距

* {
  box-sizing: border-box;
}

.wrapper {
  border: 2px solid #f76707;
  border-radius: 5px;
  background-color: #fff4e6;
}

.wrapper > div {
  border: 2px solid #ffa94d;
  border-radius: 5px;
  background-color: #fff8f8;
  padding: 1em;
  color: #d9480f;
}

.wrapper {
  display: grid;
  grid-template-columns: repeat(3, 1.2fr);
  grid-auto-rows: 45%;
  grid-column-gap: 20px;
  grid-row-gap: 20px;
}

<div class="wrapper">
  <div>一</div>
  <div>二</div>
  <div>三</div>
  <div>四</div>
  <div>五</div>
</div>