diff --git a/src/app/chat/components/chat-area.tsx b/src/app/chat/components/chat-area.tsx
index 59feb36d..fc9d1f7b 100644
--- a/src/app/chat/components/chat-area.tsx
+++ b/src/app/chat/components/chat-area.tsx
@@ -96,6 +96,8 @@ function renderMessagesWithDateHeaders(
         imagePaywalled={item.message.imagePaywalled}
         audioUrl={item.message.audioUrl}
         isFromAI={item.message.isFromAI}
+        locked={item.message.locked}
+        lockReason={item.message.lockReason}
         lockedPrivate={item.message.lockedPrivate}
         privateMessageHint={item.message.privateMessageHint}
         isUnlockingPrivate={
diff --git a/src/app/chat/components/message-bubble.tsx b/src/app/chat/components/message-bubble.tsx
index 554e34a5..1f3d29fe 100644
--- a/src/app/chat/components/message-bubble.tsx
+++ b/src/app/chat/components/message-bubble.tsx
@@ -21,6 +21,8 @@ export interface MessageBubbleProps {
   imagePaywalled?: boolean;
   audioUrl?: string | null;
   isFromAI: boolean;
+  locked?: boolean | null;
+  lockReason?: string | null;
   lockedPrivate?: boolean | null;
   privateMessageHint?: string | null;
   isUnlockingPrivate?: boolean;
@@ -35,6 +37,8 @@ export function MessageBubble({
   imagePaywalled,
   audioUrl,
   isFromAI,
+  locked,
+  lockReason,
   lockedPrivate,
   privateMessageHint,
   isUnlockingPrivate,
@@ -55,6 +59,8 @@ export function MessageBubble({
           imagePaywalled={imagePaywalled}
           audioUrl={audioUrl}
           isFromAI={true}
+          locked={locked}
+          lockReason={lockReason}
           lockedPrivate={lockedPrivate}
           privateMessageHint={privateMessageHint}
           isUnlockingPrivate={isUnlockingPrivate}
@@ -76,6 +82,8 @@ export function MessageBubble({
         imagePaywalled={imagePaywalled}
         audioUrl={audioUrl}
         isFromAI={false}
+        locked={locked}
+        lockReason={lockReason}
         lockedPrivate={lockedPrivate}
         privateMessageHint={privateMessageHint}
         isUnlockingPrivate={isUnlockingPrivate}
diff --git a/src/app/chat/components/message-content.tsx b/src/app/chat/components/message-content.tsx
index f4778ecf..d3fecb49 100644
--- a/src/app/chat/components/message-content.tsx
+++ b/src/app/chat/components/message-content.tsx
@@ -1,12 +1,4 @@
 "use client";
-/**
- * MessageContent 消息内容容器
- *
- * 决定渲染 ImageBubble 还是 TextBubble：
- *   - 有 imageUrl：渲染 ImageBubble（图片）
- *   - 有 content 且非 "[图片]" 占位符：渲染 TextBubble（文字）
- *   - 两者都有：图片在上，文字在下
- */
 import { ImageBubble } from "./image-bubble";
 import { PrivateMessageCard } from "./private-message-card";
 import { TextBubble } from "./text-bubble";
@@ -19,6 +11,8 @@ export interface MessageContentProps {
   imagePaywalled?: boolean;
   audioUrl?: string | null;
   isFromAI: boolean;
+  locked?: boolean | null;
+  lockReason?: string | null;
   lockedPrivate?: boolean | null;
   privateMessageHint?: string | null;
   isUnlockingPrivate?: boolean;
@@ -35,6 +29,8 @@ export function MessageContent({
   imagePaywalled,
   audioUrl,
   isFromAI,
+  locked,
+  lockReason,
   lockedPrivate,
   privateMessageHint,
   isUnlockingPrivate = false,
@@ -44,7 +40,10 @@ export function MessageContent({
   const hasImage = imageUrl != null && imageUrl.length > 0;
   const hasAudio = audioUrl != null && audioUrl.length > 0;
   const hasText = content.length > 0 && content !== IMAGE_PLACEHOLDER;
-  const isLockedPrivateMessage = lockedPrivate === true;
+  const isLockedPrivateMessage =
+    lockedPrivate === true ||
+    (locked === true && lockReason === "private_message");
+  const isLockedVoiceMessage = locked === true && lockReason === "voice_message";
 
   return (
     <div
@@ -82,6 +81,14 @@ export function MessageContent({
             <VoiceBubble
               audioUrl={audioUrl}
               isFromAI={isFromAI}
+              locked={isLockedVoiceMessage}
+              hint={privateMessageHint}
+              isUnlocking={isUnlockingPrivate}
+              onUnlock={
+                isLockedVoiceMessage && messageId
+                  ? () => onUnlockPrivateMessage?.(messageId)
+                  : undefined
+              }
             />
           ) : null}
           {hasText && !hasAudio ? (
diff --git a/src/app/chat/components/voice-bubble.module.css b/src/app/chat/components/voice-bubble.module.css
index 590c8061..c2415cb2 100644
--- a/src/app/chat/components/voice-bubble.module.css
+++ b/src/app/chat/components/voice-bubble.module.css
@@ -24,6 +24,14 @@
   color: #ffffff;
 }
 
+.locked {
+  border: 1px solid rgba(246, 87, 160, 0.2);
+  background:
+    linear-gradient(180deg, rgba(255, 244, 248, 0.95), rgba(255, 255, 255, 0.95)),
+    #ffffff;
+  color: #3c3b3b;
+}
+
 .playButton {
   display: inline-flex;
   flex: 0 0 auto;
@@ -43,6 +51,11 @@
   color: #ffffff;
 }
 
+.locked .playButton {
+  background: linear-gradient(135deg, #ff8fc7 0%, #f657a0 100%);
+  color: #ffffff;
+}
+
 .playButton:disabled {
   cursor: not-allowed;
   opacity: 0.6;
@@ -106,3 +119,33 @@
 .bubbleUser .error {
   color: #ffffff;
 }
+
+.hint {
+  margin: 0;
+  color: #3c3b3b;
+  font-size: 14px;
+  line-height: 1.4;
+}
+
+.unlockButton {
+  align-self: flex-start;
+  margin-top: 2px;
+  padding: 9px 14px;
+  border: 0;
+  border-radius: 999px;
+  background: linear-gradient(90deg, #ff67e0, #ff52a2);
+  color: #ffffff;
+  cursor: pointer;
+  font-size: 14px;
+  font-weight: 700;
+}
+
+.unlockButton:disabled {
+  cursor: not-allowed;
+  opacity: 0.65;
+}
+
+.unlockButton:focus-visible {
+  outline: 2px solid #f657a0;
+  outline-offset: 3px;
+}
diff --git a/src/app/chat/components/voice-bubble.tsx b/src/app/chat/components/voice-bubble.tsx
index 0b4133f3..fa71a0d0 100644
--- a/src/app/chat/components/voice-bubble.tsx
+++ b/src/app/chat/components/voice-bubble.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { Pause, Play } from "lucide-react";
+import { LockKeyhole, Pause, Play } from "lucide-react";
 import { useEffect, useRef, useState } from "react";
 
 import styles from "./voice-bubble.module.css";
@@ -8,11 +8,19 @@ import styles from "./voice-bubble.module.css";
 export interface VoiceBubbleProps {
   audioUrl: string;
   isFromAI: boolean;
+  locked?: boolean;
+  hint?: string | null;
+  isUnlocking?: boolean;
+  onUnlock?: () => void;
 }
 
 export function VoiceBubble({
   audioUrl,
   isFromAI,
+  locked = false,
+  hint,
+  isUnlocking = false,
+  onUnlock,
 }: VoiceBubbleProps) {
   const audioRef = useRef<HTMLAudioElement>(null);
   const [isPlaying, setIsPlaying] = useState(false);
@@ -43,6 +51,8 @@ export function VoiceBubble({
   }, []);
 
   const handleToggle = () => {
+    if (locked) return;
+
     const audio = audioRef.current;
     if (!audio || hasError) return;
 
@@ -61,16 +71,22 @@ export function VoiceBubble({
     <div
       className={`${styles.bubble} ${
         isFromAI ? styles.bubbleAi : styles.bubbleUser
-      }`}
+      } ${locked ? styles.locked : ""}`}
     >
       <button
         type="button"
         className={styles.playButton}
         onClick={handleToggle}
-        disabled={hasError}
+        disabled={locked || hasError}
         aria-label={isPlaying ? "Pause voice message" : "Play voice message"}
       >
-        {isPlaying ? <Pause size={18} /> : <Play size={18} />}
+        {locked ? (
+          <LockKeyhole size={18} />
+        ) : isPlaying ? (
+          <Pause size={18} />
+        ) : (
+          <Play size={18} />
+        )}
       </button>
       <div className={styles.body}>
         <div className={styles.wave} aria-hidden="true">
@@ -83,8 +99,25 @@ export function VoiceBubble({
         {hasError ? (
           <p className={styles.error}>Voice message failed to load.</p>
         ) : null}
+        {locked ? (
+          <>
+            <p className={styles.hint}>
+              {hint && hint.length > 0
+                ? hint
+                : "Elio has a locked voice message for you."}
+            </p>
+            <button
+              type="button"
+              className={styles.unlockButton}
+              disabled={isUnlocking || !onUnlock}
+              onClick={onUnlock}
+            >
+              {isUnlocking ? "Unlocking..." : "Unlock voice message"}
+            </button>
+          </>
+        ) : null}
       </div>
-      <audio ref={audioRef} src={audioUrl} preload="metadata" />
+      {!locked ? <audio ref={audioRef} src={audioUrl} preload="metadata" /> : null}
     </div>
   );
 }
diff --git a/src/data/dto/chat/ui_message.ts b/src/data/dto/chat/ui_message.ts
index 9820ba11..e9670ff5 100644
--- a/src/data/dto/chat/ui_message.ts
+++ b/src/data/dto/chat/ui_message.ts
@@ -19,6 +19,8 @@ export const UiMessageSchema = z.object({
   imagePaywalled: z.boolean().optional(),
   /** 语音 URL */
   audioUrl: z.string().optional(),
+  locked: z.boolean().nullable().optional(),
+  lockReason: z.string().nullable().optional(),
   isPrivate: z.boolean().nullable().optional(),
   lockedPrivate: z.boolean().nullable().optional(),
   privateMessageHint: z.string().nullable().optional(),
diff --git a/src/stores/chat/chat-machine.helpers.ts b/src/stores/chat/chat-machine.helpers.ts
index 2ec44609..4250e532 100644
--- a/src/stores/chat/chat-machine.helpers.ts
+++ b/src/stores/chat/chat-machine.helpers.ts
@@ -114,17 +114,18 @@ function deriveUiLockFields(
     | undefined,
   imageUrl?: string | null,
 ): Partial<UiMessage> {
-  const isPrivateMessage =
-    lockDetail?.reason === "private_message" ||
-    lockDetail?.reason === "voice_message";
+  const lockReason = lockDetail?.reason ?? null;
+  const isPrivateMessage = lockReason === "private_message";
+  const isVoiceMessage = lockReason === "voice_message";
   return {
     ...(imageUrl ? { imageUrl } : {}),
     ...(imageUrl && lockDetail?.showUpgrade ? { imagePaywalled: true } : {}),
+    ...(lockDetail ? { locked: lockDetail.locked, lockReason } : {}),
     ...(isPrivateMessage ? { isPrivate: true } : {}),
     ...(isPrivateMessage && lockDetail?.locked
       ? { lockedPrivate: true }
       : {}),
-    ...(isPrivateMessage && lockDetail?.hint
+    ...((isPrivateMessage || isVoiceMessage) && lockDetail?.hint
       ? { privateMessageHint: lockDetail.hint }
       : {}),
   };
diff --git a/src/stores/chat/chat-machine.ts b/src/stores/chat/chat-machine.ts
index 0467dbd0..a9a08a23 100644
--- a/src/stores/chat/chat-machine.ts
+++ b/src/stores/chat/chat-machine.ts
@@ -323,6 +323,7 @@ export const chatMachine = setup({
               ? {
                   ...message,
                   content: response.content ?? message.content,
+                  locked: false,
                   lockedPrivate: false,
                   privateMessageHint: null,
                   isPrivate: message.isPrivate ?? true,