.parent {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between; /* 或 space-evenly */
}

.child {
  flex-grow: 1;
  flex-shrink: 1;
  flex-basis: 30%; /* 或設(shè)置寬度 */
  box-sizing: border-box;
  padding: 10px; /* 內(nèi)邊距 */
  min-width: 200px; /* 最小寬度 */
}