diff --git a/packages/backend/src/lib/adapters/bilibili.ts b/packages/backend/src/lib/adapters/bilibili.ts
index 749ab54..2ea0a41 100644
--- a/packages/backend/src/lib/adapters/bilibili.ts
+++ b/packages/backend/src/lib/adapters/bilibili.ts
@@ -1,6 +1,13 @@
 import type { ContentItem, PlatformAdapter } from "@muse/shared";
 import { tikhubFetch } from "../tikhub";
 
+/** Ensure Bilibili URLs use https:// (API may return protocol-relative "//..." or http) */
+function normalizeUrl(url: string): string {
+  if (url.startsWith("//")) return `https:${url}`;
+  if (url.startsWith("http://")) return url.replace("http://", "https://");
+  return url;
+}
+
 export class BilibiliAdapter implements PlatformAdapter {
   async fetchTrending(count: number): Promise<ContentItem[]> {
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -44,10 +51,10 @@ export class BilibiliAdapter implements PlatformAdapter {
     return {
       id: String(aid || bvid),
       title: raw?.title || "无标题",
-      cover_url: raw?.pic || undefined,
+      cover_url: raw?.pic ? normalizeUrl(raw.pic) : undefined,
       video_url: undefined,
       author_name: owner?.name || raw?.author || "未知作者",
-      author_avatar: owner?.face || undefined,
+      author_avatar: owner?.face ? normalizeUrl(owner.face) : undefined,
       play_count: stat?.view ?? undefined,
       like_count: stat?.like ?? undefined,
       collect_count: stat?.favorite ?? undefined,
diff --git a/packages/frontend/src/components/card/ContentCard.tsx b/packages/frontend/src/components/card/ContentCard.tsx
index 3ff62fa..e91f4c5 100644
--- a/packages/frontend/src/components/card/ContentCard.tsx
+++ b/packages/frontend/src/components/card/ContentCard.tsx
@@ -35,6 +35,7 @@ export function ContentCard({ item }: ContentCardProps) {
             alt={item.title}
             fill
             unoptimized
+            referrerPolicy="no-referrer"
             className="object-cover"
             loading="lazy"
             sizes="(max-width: 640px) 100vw, (max-width: 960px) 50vw, (max-width: 1240px) 33vw, 25vw"
@@ -84,6 +85,7 @@ export function ContentCard({ item }: ContentCardProps) {
               width={20}
               height={20}
               unoptimized
+              referrerPolicy="no-referrer"
               className="rounded-full object-cover"
               onError={(e) => {
                 (e.target as HTMLImageElement).style.display = "none";
diff --git a/packages/frontend/src/components/detail/DetailPanel.tsx b/packages/frontend/src/components/detail/DetailPanel.tsx
index b58f8ba..6bbf0d7 100644
--- a/packages/frontend/src/components/detail/DetailPanel.tsx
+++ b/packages/frontend/src/components/detail/DetailPanel.tsx
@@ -46,6 +46,7 @@ export function DetailPanel({ item }: DetailPanelProps) {
             alt={item.title}
             fill
             unoptimized
+            referrerPolicy="no-referrer"
             className="object-cover"
             priority
             sizes="(max-width: 768px) 100vw, 768px"
@@ -87,6 +88,7 @@ export function DetailPanel({ item }: DetailPanelProps) {
               width={40}
               height={40}
               unoptimized
+              referrerPolicy="no-referrer"
               className="rounded-full object-cover"
               onError={(e) => {
                 (e.target as HTMLImageElement).style.display = "none";