纯css写网格

  background-image: linear-gradient(90deg, #dfdfdf 2px, transparent 0), linear-gradient(#dfdfdf 2px, transparent 0), linear-gradient(90deg, #dfdfdf 1px, transparent 0), linear-gradient(#dfdfdf 1px, transparent 0)
  background-size: 100px 100px, 100px 100px, 40px 40px, 40px 40px
  background-color: #f3f3f3
   100%
  height: 100%
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原文地址：https://www.cnblogs.com/smart-girl/p/13392516.html