.help-icon { opacity: .7; cursor: help; }
  .edit-btn {
    border: none; background: transparent; cursor: pointer;
    padding: 4px; border-radius: 6px;
  }
  .edit-btn:focus-visible { outline: 2px solid #4c9ffe; }
  .edit-btn svg { width: 16px; height: 16px; display: block; }

  /* title_change_modal */
  .title_change_modal-backdrop {
    position: fixed; inset: 0; background: rgba(0,0,0,.35);
    display: flex; align-items: center; justify-content: center; z-index: 9999;
  }
  .title_change_modal {
    width: min(520px, 92vw); background: #fff; border-radius: 12px; padding: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,.25);
  }
  .title_change_modal h3 { margin: 0 0 10px; font-size: 16px; }
  .title_change_modal .field { display: flex; flex-direction: column; gap: 6px; }
  .title_change_modal input[type="text"] {
    padding: 8px 10px; border: 1px solid #ccc; border-radius: 8px; font-size: 14px;
  }
  .title_change_modal .error {
    color: #c62828; font-size: 12px; min-height: 1.2em; /* 占位避免跳动 */
  }
  .title_change_modal .actions {
    margin-top: 12px; display: flex; gap: 8px; justify-content: flex-end;
  }
  .btn {
    padding: 6px 12px; border-radius: 8px; border: 1px solid #d0d0d0; background: #f6f6f6; cursor: pointer;
  }
  .btn.primary { background: #2563eb; color: #fff; border-color: #2563eb; }
  .btn:focus-visible { outline: 2px solid #4c9ffe; }
  .sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }