<div class="model-plat-content"><div class="mode-card" v-for="i in 30"></div></div>

  .model-plat-content {display: grid;// 解释： repeat(auto-fit, minmax(250px, 1fr)) 自动填充，每行最大250px，最小1frgrid-template-columns: repeat(auto-fit, minmax(250px, 1fr));grid-gap: 20px;.mode-card {width: 250px;height: 250px;border-radius: 20px;background-color: #252525;}}