diff --git a/src/main.ts b/src/main.ts
index b430de7..f0a3d23 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -942,7 +942,8 @@ function setMemberFck(member: FckMember, raw: string): void {
 /** fck row on a ② card for a member that has its own fck: value, the 공통 value beside it, and a revert when set. */
 function renderMemberFck(box: HTMLDivElement, member: FckMember): void {
   const own = state.fckByMember[member];
-  const row = el('div', undefined, own === undefined ? 'edit-row' : 'edit-row changed');
+  // Not the orange "changed" style: fck changes only the rebar, so it is not a pending shape change (변경 n건).
+  const row = el('div', undefined, 'edit-row');
   const id = `member-fck-${member}`;
   const label = el('label', 'fck (MPa)');
   label.htmlFor = id;
@@ -952,7 +953,8 @@ function renderMemberFck(box: HTMLDivElement, member: FckMember): void {
   input.step = 'any';
   input.value = String(own ?? state.material.fck);
   input.addEventListener('change', () => setMemberFck(member, input.value));
-  row.append(label, input, el('span', `공통 ${state.material.fck}`, 'muted small'));
+  const note = own === undefined ? `공통 ${state.material.fck}` : `공통 ${state.material.fck} · 배근에만 반영`;
+  row.append(label, input, el('span', note, 'muted small'));
   if (own !== undefined) {
     const revert = el('button', '되돌리기', 'btn small');
     revert.type = 'button';