css元素竖着排列，超出一定高度，另起一列

.container {
  width: 300px;
  height: 90vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-content: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px;
  border: solid 1px teal;
}
.item {
  width: 80px;
  height: 80px;
  background: teal;
  border-radius: 8px;
}