diff --git a/admin/src/lib/types.ts b/admin/src/lib/types.ts
index 397ab81..8db3c3f 100644
--- a/admin/src/lib/types.ts
+++ b/admin/src/lib/types.ts
@@ -412,6 +412,7 @@ export interface AdminSiteSettingsResponse {
   media_r2_public_base_url: string | null
   media_r2_access_key_id: string | null
   media_r2_secret_access_key: string | null
+  seo_favicon_url: string | null
   seo_default_og_image: string | null
   seo_default_twitter_handle: string | null
   seo_wechat_share_qr_enabled: boolean
@@ -489,6 +490,7 @@ export interface SiteSettingsPayload {
   mediaR2PublicBaseUrl?: string | null
   mediaR2AccessKeyId?: string | null
   mediaR2SecretAccessKey?: string | null
+  seoFaviconUrl?: string | null
   seoDefaultOgImage?: string | null
   seoDefaultTwitterHandle?: string | null
   seoWechatShareQrEnabled?: boolean
diff --git a/admin/src/pages/site-settings-page.tsx b/admin/src/pages/site-settings-page.tsx
index 54d7efc..a100da9 100644
--- a/admin/src/pages/site-settings-page.tsx
+++ b/admin/src/pages/site-settings-page.tsx
@@ -216,6 +216,7 @@ function toPayload(form: AdminSiteSettingsResponse): SiteSettingsPayload {
     mediaR2PublicBaseUrl: form.media_r2_public_base_url,
     mediaR2AccessKeyId: form.media_r2_access_key_id,
     mediaR2SecretAccessKey: form.media_r2_secret_access_key,
+    seoFaviconUrl: form.seo_favicon_url,
     seoDefaultOgImage: form.seo_default_og_image,
     seoDefaultTwitterHandle: form.seo_default_twitter_handle,
     seoWechatShareQrEnabled: form.seo_wechat_share_qr_enabled,
@@ -915,6 +916,22 @@ export function SiteSettingsPage() {
               </CardDescription>
             </CardHeader>
             <CardContent className="grid gap-6 lg:grid-cols-2">
+              <Field label="Favicon URL" hint="浏览器标签页图标；支持外链，也支持上传 / 抓取 / 选择媒体库。">
+                <div className="space-y-3">
+                  <Input
+                    value={form.seo_favicon_url ?? ''}
+                    onChange={(event) => updateField('seo_favicon_url', event.target.value)}
+                  />
+                  <MediaUrlControls
+                    value={form.seo_favicon_url ?? ''}
+                    onChange={(seoFaviconUrl) => updateField('seo_favicon_url', seoFaviconUrl)}
+                    prefix="seo-assets/"
+                    contextLabel="站点 favicon 上传"
+                    remoteTitle={form.site_name || form.site_title || '站点 favicon'}
+                    dataTestIdPrefix="site-favicon"
+                  />
+                </div>
+              </Field>
               <Field label="默认 OG 图 URL" hint="文章未单独设置时作为分享图回退，也支持上传 / 抓取 / 选择媒体库。">
                 <div className="space-y-3">
                   <Input
diff --git a/backend/assets/seeds/site_settings.yaml b/backend/assets/seeds/site_settings.yaml
index 6bd3d4b..1e736cc 100644
--- a/backend/assets/seeds/site_settings.yaml
+++ b/backend/assets/seeds/site_settings.yaml
@@ -60,3 +60,4 @@
   ai_system_prompt: "你是这个博客的站内 AI 助手。请优先依据检索到的站内内容回答问题，回答保持准确、简洁、清晰；如果上下文不足，请明确说明，不要编造。"
   ai_top_k: 4
   ai_chunk_size: 1200
+  seo_favicon_url: null
diff --git a/backend/migration/src/lib.rs b/backend/migration/src/lib.rs
index ff2038c..e89d9e8 100644
--- a/backend/migration/src/lib.rs
+++ b/backend/migration/src/lib.rs
@@ -47,6 +47,7 @@ mod m20260402_000036_create_worker_jobs;
 mod m20260402_000037_add_wechat_share_qr_setting_to_site_settings;
 mod m20260402_000038_add_music_enabled_to_site_settings;
 mod m20260402_000039_add_maintenance_mode_to_site_settings;
+mod m20260403_000040_add_favicon_url_to_site_settings;
 pub struct Migrator;
 
 #[async_trait::async_trait]
@@ -98,6 +99,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260402_000037_add_wechat_share_qr_setting_to_site_settings::Migration),
             Box::new(m20260402_000038_add_music_enabled_to_site_settings::Migration),
             Box::new(m20260402_000039_add_maintenance_mode_to_site_settings::Migration),
+            Box::new(m20260403_000040_add_favicon_url_to_site_settings::Migration),
             // inject-above (do not remove this comment)
         ]
     }
diff --git a/backend/migration/src/m20260403_000040_add_favicon_url_to_site_settings.rs b/backend/migration/src/m20260403_000040_add_favicon_url_to_site_settings.rs
new file mode 100644
index 0000000..d1055be
--- /dev/null
+++ b/backend/migration/src/m20260403_000040_add_favicon_url_to_site_settings.rs
@@ -0,0 +1,45 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let table = Alias::new("site_settings");
+
+        if !manager.has_column("site_settings", "seo_favicon_url").await? {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(
+                            ColumnDef::new(Alias::new("seo_favicon_url"))
+                                .string()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let table = Alias::new("site_settings");
+
+        if manager.has_column("site_settings", "seo_favicon_url").await? {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table)
+                        .drop_column(Alias::new("seo_favicon_url"))
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        Ok(())
+    }
+}
diff --git a/backend/src/app.rs b/backend/src/app.rs
index af39277..6e10757 100644
--- a/backend/src/app.rs
+++ b/backend/src/app.rs
@@ -397,6 +397,14 @@ impl Hooks for App {
                                 Some(trimmed.to_string())
                             }
                         });
+                    let seo_favicon_url = settings["seo_favicon_url"].as_str().and_then(|value| {
+                        let trimmed = value.trim();
+                        if trimmed.is_empty() {
+                            None
+                        } else {
+                            Some(trimmed.to_string())
+                        }
+                    });
 
                     let item = site_settings::ActiveModel {
                         id: Set(settings["id"].as_i64().unwrap_or(1) as i32),
@@ -441,6 +449,7 @@ impl Hooks for App {
                         music_enabled: Set(music_enabled),
                         maintenance_mode_enabled: Set(maintenance_mode_enabled),
                         maintenance_access_code: Set(maintenance_access_code),
+                        seo_favicon_url: Set(seo_favicon_url),
                         ai_enabled: Set(settings["ai_enabled"].as_bool()),
                         paragraph_comments_enabled: Set(settings["paragraph_comments_enabled"]
                             .as_bool()
diff --git a/backend/src/controllers/admin_api.rs b/backend/src/controllers/admin_api.rs
index 6f85ec8..eb92522 100644
--- a/backend/src/controllers/admin_api.rs
+++ b/backend/src/controllers/admin_api.rs
@@ -213,6 +213,7 @@ pub struct AdminSiteSettingsResponse {
     pub media_r2_public_base_url: Option<String>,
     pub media_r2_access_key_id: Option<String>,
     pub media_r2_secret_access_key: Option<String>,
+    pub seo_favicon_url: Option<String>,
     pub seo_default_og_image: Option<String>,
     pub seo_default_twitter_handle: Option<String>,
     pub seo_wechat_share_qr_enabled: bool,
@@ -1068,6 +1069,7 @@ fn build_settings_response(
         media_r2_public_base_url: item.media_r2_public_base_url,
         media_r2_access_key_id: item.media_r2_access_key_id,
         media_r2_secret_access_key: item.media_r2_secret_access_key,
+        seo_favicon_url: item.seo_favicon_url,
         seo_default_og_image: item.seo_default_og_image,
         seo_default_twitter_handle: item.seo_default_twitter_handle,
         seo_wechat_share_qr_enabled: item.seo_wechat_share_qr_enabled.unwrap_or(false),
diff --git a/backend/src/controllers/site_settings.rs b/backend/src/controllers/site_settings.rs
index 709c048..f40c5d3 100644
--- a/backend/src/controllers/site_settings.rs
+++ b/backend/src/controllers/site_settings.rs
@@ -160,6 +160,8 @@ pub struct SiteSettingsPayload {
     pub media_r2_access_key_id: Option<String>,
     #[serde(default, alias = "mediaR2SecretAccessKey")]
     pub media_r2_secret_access_key: Option<String>,
+    #[serde(default, alias = "seoFaviconUrl")]
+    pub seo_favicon_url: Option<String>,
     #[serde(default, alias = "seoDefaultOgImage")]
     pub seo_default_og_image: Option<String>,
     #[serde(default, alias = "seoDefaultTwitterHandle")]
@@ -220,6 +222,7 @@ pub struct PublicSiteSettingsResponse {
     pub subscription_popup_title: String,
     pub subscription_popup_description: String,
     pub subscription_popup_delay_seconds: i32,
+    pub seo_favicon_url: Option<String>,
     pub seo_default_og_image: Option<String>,
     pub seo_default_twitter_handle: Option<String>,
     pub seo_wechat_share_qr_enabled: bool,
@@ -776,6 +779,9 @@ impl SiteSettingsPayload {
             item.media_r2_secret_access_key =
                 normalize_optional_string(Some(media_r2_secret_access_key));
         }
+        if let Some(seo_favicon_url) = self.seo_favicon_url {
+            item.seo_favicon_url = normalize_optional_string(Some(seo_favicon_url));
+        }
         if let Some(seo_default_og_image) = self.seo_default_og_image {
             item.seo_default_og_image = normalize_optional_string(Some(seo_default_og_image));
         }
@@ -942,6 +948,7 @@ fn default_payload() -> SiteSettingsPayload {
         media_r2_public_base_url: None,
         media_r2_access_key_id: None,
         media_r2_secret_access_key: None,
+        seo_favicon_url: None,
         seo_default_og_image: None,
         seo_default_twitter_handle: None,
         seo_wechat_share_qr_enabled: Some(false),
@@ -1041,6 +1048,7 @@ fn public_response(model: Model) -> PublicSiteSettingsResponse {
         subscription_popup_delay_seconds: model
             .subscription_popup_delay_seconds
             .unwrap_or_else(default_subscription_popup_delay_seconds),
+        seo_favicon_url: model.seo_favicon_url,
         seo_default_og_image: model.seo_default_og_image,
         seo_default_twitter_handle: model.seo_default_twitter_handle,
         seo_wechat_share_qr_enabled: model.seo_wechat_share_qr_enabled.unwrap_or(false),
diff --git a/backend/src/fixtures/site_settings.yaml b/backend/src/fixtures/site_settings.yaml
index 6bd3d4b..1e736cc 100644
--- a/backend/src/fixtures/site_settings.yaml
+++ b/backend/src/fixtures/site_settings.yaml
@@ -60,3 +60,4 @@
   ai_system_prompt: "你是这个博客的站内 AI 助手。请优先依据检索到的站内内容回答问题，回答保持准确、简洁、清晰；如果上下文不足，请明确说明，不要编造。"
   ai_top_k: 4
   ai_chunk_size: 1200
+  seo_favicon_url: null
diff --git a/backend/src/initializers/content_sync.rs b/backend/src/initializers/content_sync.rs
index cf9b945..b3d1de5 100644
--- a/backend/src/initializers/content_sync.rs
+++ b/backend/src/initializers/content_sync.rs
@@ -111,6 +111,7 @@ async fn sync_site_settings(ctx: &AppContext, base: &Path) -> Result<()> {
     let music_enabled = seed["music_enabled"].as_bool().or(Some(true));
     let maintenance_mode_enabled = seed["maintenance_mode_enabled"].as_bool().or(Some(false));
     let maintenance_access_code = as_optional_string(&seed["maintenance_access_code"]);
+    let seo_favicon_url = as_optional_string(&seed["seo_favicon_url"]);
     let comment_verification_mode = as_optional_string(&seed["comment_verification_mode"]);
     let subscription_verification_mode =
         as_optional_string(&seed["subscription_verification_mode"]);
@@ -196,6 +197,9 @@ async fn sync_site_settings(ctx: &AppContext, base: &Path) -> Result<()> {
         if is_blank(&existing.maintenance_access_code) {
             model.maintenance_access_code = Set(maintenance_access_code.clone());
         }
+        if is_blank(&existing.seo_favicon_url) {
+            model.seo_favicon_url = Set(seo_favicon_url.clone());
+        }
         if existing.ai_enabled.is_none() {
             model.ai_enabled = Set(seed["ai_enabled"].as_bool());
         }
@@ -278,6 +282,7 @@ async fn sync_site_settings(ctx: &AppContext, base: &Path) -> Result<()> {
         music_enabled: Set(music_enabled),
         maintenance_mode_enabled: Set(maintenance_mode_enabled),
         maintenance_access_code: Set(maintenance_access_code),
+        seo_favicon_url: Set(seo_favicon_url),
         ai_enabled: Set(seed["ai_enabled"].as_bool()),
         paragraph_comments_enabled: Set(seed["paragraph_comments_enabled"]
             .as_bool()
diff --git a/backend/src/models/_entities/site_settings.rs b/backend/src/models/_entities/site_settings.rs
index 15a0627..f0a766b 100644
--- a/backend/src/models/_entities/site_settings.rs
+++ b/backend/src/models/_entities/site_settings.rs
@@ -78,6 +78,8 @@ pub struct Model {
     #[sea_orm(column_type = "Text", nullable)]
     pub media_r2_secret_access_key: Option<String>,
     #[sea_orm(column_type = "Text", nullable)]
+    pub seo_favicon_url: Option<String>,
+    #[sea_orm(column_type = "Text", nullable)]
     pub seo_default_og_image: Option<String>,
     pub seo_default_twitter_handle: Option<String>,
     pub seo_wechat_share_qr_enabled: Option<bool>,
diff --git a/frontend/public/favicon.ico b/frontend/public/favicon.ico
deleted file mode 100644
index 7f48a94..0000000
Binary files a/frontend/public/favicon.ico and /dev/null differ
diff --git a/frontend/src/layouts/BaseLayout.astro b/frontend/src/layouts/BaseLayout.astro
index 80c7079..10f874f 100644
--- a/frontend/src/layouts/BaseLayout.astro
+++ b/frontend/src/layouts/BaseLayout.astro
@@ -148,7 +148,7 @@ const i18nPayload = JSON.stringify({ locale, messages });
       title={`${siteSettings.siteName} llms-full.txt`}
       href={`${siteUrl}/llms-full.txt`}
     />
-    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <link rel="icon" href="/favicon.ico" />
     <title>{title}</title>
     {jsonLd && <script type="application/ld+json" set:html={jsonLd}></script>}
     <slot name="head" />
diff --git a/frontend/src/lib/api/client.ts b/frontend/src/lib/api/client.ts
index 0eb8fbc..9030526 100644
--- a/frontend/src/lib/api/client.ts
+++ b/frontend/src/lib/api/client.ts
@@ -293,6 +293,7 @@ export interface ApiSiteSettings {
   subscription_popup_title: string | null;
   subscription_popup_description: string | null;
   subscription_popup_delay_seconds: number | null;
+  seo_favicon_url: string | null;
   seo_default_og_image: string | null;
   seo_default_twitter_handle: string | null;
   seo_wechat_share_qr_enabled: boolean;
@@ -492,6 +493,7 @@ export const DEFAULT_SITE_SETTINGS: SiteSettings = {
     webPushVapidPublicKey: undefined,
   },
   seo: {
+    faviconUrl: undefined,
     defaultOgImage: undefined,
     defaultTwitterHandle: undefined,
     wechatShareQrEnabled: false,
@@ -669,6 +671,7 @@ const normalizeSiteSettings = (settings: ApiSiteSettings): SiteSettings => {
         undefined,
     },
     seo: {
+      faviconUrl: settings.seo_favicon_url ?? undefined,
       defaultOgImage: settings.seo_default_og_image ?? undefined,
       defaultTwitterHandle: settings.seo_default_twitter_handle ?? undefined,
       wechatShareQrEnabled: Boolean(settings.seo_wechat_share_qr_enabled),
diff --git a/frontend/src/lib/maintenance.ts b/frontend/src/lib/maintenance.ts
index 554c55f..099d4ac 100644
--- a/frontend/src/lib/maintenance.ts
+++ b/frontend/src/lib/maintenance.ts
@@ -33,7 +33,9 @@ export function shouldBypassMaintenance(pathname: string): boolean {
     pathname === '/maintenance' ||
     pathname.startsWith('/api/maintenance') ||
     pathname === '/healthz' ||
-    pathname === '/favicon.svg' ||
+    pathname === '/favicon.ico' ||
+    pathname.startsWith('/favicon.') ||
+    pathname.startsWith('/apple-touch-icon') ||
     pathname.startsWith('/_astro/') ||
     pathname.startsWith('/_image') ||
     pathname.startsWith('/_img')
diff --git a/frontend/src/lib/types/index.ts b/frontend/src/lib/types/index.ts
index 8cfc5e0..49cf37a 100644
--- a/frontend/src/lib/types/index.ts
+++ b/frontend/src/lib/types/index.ts
@@ -106,6 +106,7 @@ export interface SiteSettings {
     webPushVapidPublicKey?: string;
   };
   seo: {
+    faviconUrl?: string;
     defaultOgImage?: string;
     defaultTwitterHandle?: string;
     wechatShareQrEnabled: boolean;
diff --git a/frontend/src/pages/favicon.ico.ts b/frontend/src/pages/favicon.ico.ts
new file mode 100644
index 0000000..fba62f8
--- /dev/null
+++ b/frontend/src/pages/favicon.ico.ts
@@ -0,0 +1,35 @@
+import type { APIRoute } from 'astro'
+
+import { createApiClient, DEFAULT_SITE_SETTINGS } from '../lib/api/client'
+
+function resolveFaviconTarget(requestUrl: URL, configured: string | undefined) {
+  const fallbackTarget = '/favicon.svg'
+  const candidate = configured?.trim()
+
+  if (!candidate) {
+    return fallbackTarget
+  }
+
+  try {
+    const resolved = new URL(candidate, requestUrl)
+    if (resolved.pathname === '/favicon.ico' && resolved.origin === requestUrl.origin) {
+      return fallbackTarget
+    }
+
+    return resolved.toString()
+  } catch {
+    return fallbackTarget
+  }
+}
+
+export const GET: APIRoute = async ({ url, redirect }) => {
+  let siteSettings = DEFAULT_SITE_SETTINGS
+
+  try {
+    siteSettings = await createApiClient({ requestUrl: url }).getSiteSettings()
+  } catch (error) {
+    console.error('Failed to load site settings for favicon:', error)
+  }
+
+  return redirect(resolveFaviconTarget(url, siteSettings.seo.faviconUrl), 302)
+}
diff --git a/frontend/src/pages/maintenance.astro b/frontend/src/pages/maintenance.astro
index 250db42..1de2d48 100644
--- a/frontend/src/pages/maintenance.astro
+++ b/frontend/src/pages/maintenance.astro
@@ -20,9 +20,9 @@ const errorMessage =
     ? '请先输入访问口令。'
     : errorCode === 'invalid'
       ? '口令不正确，请重新输入。'
-      : errorCode === 'unavailable'
-        ? '当前无法校验访问口令，请稍后再试。'
-        : ''
+        : errorCode === 'unavailable'
+          ? '当前无法校验访问口令，请稍后再试。'
+          : ''
 ---
 
 <!DOCTYPE html>
@@ -31,6 +31,7 @@ const errorMessage =
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="robots" content="noindex, nofollow" />
+    <link rel="icon" href="/favicon.ico" />
     <title>{siteSettings.siteName} · 维护模式</title>
   </head>
   <body class="min-h-screen bg-[var(--bg)] text-[var(--text)]">
diff --git a/playwright-smoke/mock-server.mjs b/playwright-smoke/mock-server.mjs
index eb89cce..b4a87a0 100644
--- a/playwright-smoke/mock-server.mjs
+++ b/playwright-smoke/mock-server.mjs
@@ -824,6 +824,7 @@ function createSiteSettings() {
     media_r2_public_base_url: `${MOCK_ORIGIN}/media`,
     media_r2_access_key_id: 'mock-access-key',
     media_r2_secret_access_key: 'mock-secret',
+    seo_favicon_url: `${MOCK_ORIGIN}/favicon.svg`,
     seo_default_og_image: `${MOCK_ORIGIN}/media-files/default-og.svg`,
     seo_default_twitter_handle: '@initcool',
     seo_wechat_share_qr_enabled: false,
@@ -2768,6 +2769,7 @@ const server = createServer(async (req, res) => {
         mediaR2PublicBaseUrl: 'media_r2_public_base_url',
         mediaR2AccessKeyId: 'media_r2_access_key_id',
         mediaR2SecretAccessKey: 'media_r2_secret_access_key',
+        seoFaviconUrl: 'seo_favicon_url',
         seoDefaultOgImage: 'seo_default_og_image',
         seoDefaultTwitterHandle: 'seo_default_twitter_handle',
         seoWechatShareQrEnabled: 'seo_wechat_share_qr_enabled',