.chat-mine {
  margin: 6px 12px;
  padding: 8px 16px;
  border-radius: 15px;

  display: flex;
  flex-direction: column;
  min-width: 100px;
  max-width: 100%; // ✅ 限制最大宽度
  overflow-x: hidden; // ✅ 防止横向撑开
}