如何使用 CSS 网格获得 5 个元素的 3 列 2 行对称布局?

How can I get a 3 columns by 2 rows symmetrical layout with 5 elements using CSS grid?

我使用 CSS flexbox:

获得了下面的布局

* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}

.my-grid {
  list-style-type: none;
  padding: 0;
  margin: 0 auto;
  display: flex;
  width: 162px;
  flex-wrap: wrap;
}


.my-grid li {
  border: 1px solid rgba(0, 0, 0 , 0.125);
  background:#c00;
  color: #fff;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 2px;
} 

.my-grid li:nth-child(4),
.my-grid li:nth-child(5) {
  width: 77px;
}
<ul class="my-grid">
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
  <li>5</li>
</ul>

但是,我尝试使用 CSS 网格 获得相同结果的尝试失败了。我得到的是:

* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}

.my-grid {
  width: 160px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: repeat(2, 50px);
  grid-gap: 5px;
  list-style-type: none;
  margin: 0 auto;
  padding: 0;
}


.my-grid li {
  border: 1px solid rgba(0, 0, 0 , 0.125);
  background:#c00;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
} 
<ul class="my-grid">
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
  <li>5</li>
</ul>

我希望能够通过使用 CSS 网格来实现您在第一个代码段中看到的结果,并使用尽可能少的行。 (我发现 CSS 网格通常非常灵活和优雅)。

这可能吗?我错过了什么?

一种方式(多行然后 flex):

* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}

.my-grid {
  width: 160px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(2, 50px);
  grid-gap: 5px;
  list-style-type: none;
  margin: 0 auto;
  padding: 0;
}


.my-grid li {
  border: 1px solid rgba(0, 0, 0 , 0.125);
  background:#c00;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}
.my-grid li:first-child {
  grid-column: 1/3;
}
.my-grid li:nth-child(2) {
  grid-column: 3/5;
}
.my-grid li:nth-child(3) {
  grid-column: 5/7;
}
.my-grid li:nth-child(4) {
  grid-row: 2;
  grid-column: 1/4;
}
.my-grid li:last-child {
  grid-row: 2;
  grid-column: 4/7;
}
<ul class="my-grid">
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
  <li>5</li>
</ul>

只需告诉 children 默认跨越 6 列网格 中的 2 列,而较宽的跨越 3 列..

* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}

.my-grid {
  width: 160px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(2, 50px);
  grid-gap: 5px;
  list-style-type: none;
  margin: 0 auto;
  padding: 0;
}

.my-grid li {
  border: 1px solid rgba(0, 0, 0, 0.125);
  background: #c00;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  grid-column: span 2;
}

.my-grid li:nth-last-child(2),
.my-grid li:nth-last-child(1) {
  grid-column: span 3
}
<ul class="my-grid">
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
  <li>5</li>
</ul>