<section class="example">
      <div class="number">奇数</div>
      <div class="number">偶数</div>
      <div class="number">奇数</div>
      <div class="number">偶数</div>
      <div class="number">奇数</div>
      <div class="number">偶数</div>
      <div class="number">奇数</div>
      <div class="number">偶数</div>
      <div class="number">奇数</div>
      <div class="number">偶数</div>
    </section>


.example {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  padding: 20px;
}
.example .number {
  background-color: #f4f4f4;
  border: 1px solid #ccc;
  padding: 20px;
  text-align: center;
  font-size: 1.2em;
  color: #333;
}


.example .number:nth-child(odd) {
  background-color: #f0f0f0;
}

.example .number:nth-child(even) {
  background-color: #e0e0e0;
}

External CSS

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External JavaScript

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