css 瀑布流布局

.demand_card {

margin-top: 24rpx;

// flex-wrap: wrap;

display: grid;

grid-template-columns: repeat(3, 1fr);

grid-gap: 16px;

.demand_icon {
  width: 27rpx;
  height: 30rpx;
}

}

.demand_item {

box-sizing: border-box;

}