如何在CSS网格中的行之间具有不同的列宽？

Question

我需要创建如图所示的网格项目。第一项必须为45％，第二项和第三项必须为52.5％，其余各项分别为50％。我不能更改HTML，因为所有的网格子对象都来自循环。因此，我无法通过编写的CSS来实现此功能，请检查代码段，由我的CSS只能将所有项目的左侧宽度设为50％或45％，但是如何将项目的宽度从4更改为其余的项目。

是否可以不更改HTML？

.atul {
  display: grid;
  grid-template-columns: 45% 52.5%;
  grid-template-rows: auto;
  grid-gap: 2.5%;
  grid-template-areas: "card1 card2" 
                       "card1 card3";
}

.card:nth-child(1) {
  grid-area: card1;
}

.card:nth-child(2) {
  grid-area: card2;
}

.card:nth-child(3) {
  grid-area: card3;
}

<div class="atul">
  <div class="card" style="background-color: red;">Card 1</div>
  <div class="card" style="background-color: green;">Card 2</div>
  <div class="card" style="background-color: yellow;">Card 3</div>
  <div class="card" style="background-color: skyblue;">Card 4</div>
  <div class="card" style="background-color: skyblue;">Card 5</div>
  <div class="card" style="background-color: skyblue;">Card 6</div>
  <div class="card" style="background-color: skyblue;">Card 7</div>
  <div class="card" style="background-color: skyblue;">Card 8</div>
  <div class="card" style="background-color: skyblue;">Card 9</div>
  <div class="card" style="background-color: skyblue;">Card 10</div>
  <div class="card" style="background-color: skyblue;">Card 11</div>
  <div class="card" style="background-color: skyblue;">Card 12</div>
  <div class="card" style="background-color: skyblue;">Card 13</div>
</div>

Answer 1

要进行此工作，您需要为所有三个长度（42.5％，48.75％和52.5％）找到一个commondivider]。使用公共分隔线，您可以创建合适的列数以容纳每个网格区域。

在下面的示例中，我创建了400列，每列的宽度为.25％（400 * .25 = 100％）。

然后它将网格区域跨越正确的列数：

45.00 / .25 = 180

48.75 / .25 = 195

52.50 / .25 = 210
可能不完全是您想要的，但是希望这个概念可以帮助您前进。

HTML不变。

.atul {
  display: grid;
  grid-template-columns: repeat(400, .25%);
  grid-auto-rows: 50px; /* for demo only */
  grid-row-gap: 30px;   /* note that you need to create column gaps through
                           the proper distribution of columns, because if you
                           use `grid-column-gap`, it will add a gap between
                           all 400 columns */
}

.card:nth-child(1) {
  grid-column: 1 / 180;
  grid-row: 1 / 3;
}

.card:nth-child(2) {
  grid-column: -1 / -210; /* starting at the end line of the grid
                             (works only in explicit grids) */
  grid-row: 1 / 2;
}

.card:nth-child(3) {
  grid-column: -1 / -210;
  grid-row: 2 / 3;
}

/* starting at the 4th item, target even items only */
.card:nth-child(n + 4):nth-child(even) {
  grid-column: 1 / 195;
}

.card:nth-child(n + 4):nth-child(odd) {
  grid-column: -1 / -195;
}

.card:nth-child(4),
.card:nth-child(5) {
  grid-row: 3;
}

.card:nth-child(6),
.card:nth-child(7) {
  grid-row: 4;
}

.card:nth-child(8),
.card:nth-child(9) {
  grid-row: 5;
}

.card:nth-child(10),
.card:nth-child(11) {
  grid-row: 6;
}

.card:nth-child(12),
.card:nth-child(13) {
  grid-row: 7;
}
<div class="atul">
  <div class="card" style="background-color: red;">Card 1</div>
  <div class="card" style="background-color: green;">Card 2</div>
  <div class="card" style="background-color: yellow;">Card 3</div>
  <div class="card" style="background-color: skyblue;">Card 4</div>
  <div class="card" style="background-color: skyblue;">Card 5</div>
  <div class="card" style="background-color: skyblue;">Card 6</div>
  <div class="card" style="background-color: skyblue;">Card 7</div>
  <div class="card" style="background-color: skyblue;">Card 8</div>
  <div class="card" style="background-color: skyblue;">Card 9</div>
  <div class="card" style="background-color: skyblue;">Card 10</div>
  <div class="card" style="background-color: skyblue;">Card 11</div>
  <div class="card" style="background-color: skyblue;">Card 12</div>
  <div class="card" style="background-color: skyblue;">Card 13</div>
</div>

jsFiddle demo