diff --git a/web/index.html b/web/index.html
index 158afdb88..476c83f11 100644
--- a/web/index.html
+++ b/web/index.html
@@ -4,7 +4,9 @@
         <meta charset="UTF-8" />
         <meta name="viewport" content="width=device-width, initial-scale=1.0" />
         <meta name="description" content="AI 影视与短剧创作工作台" />
-        <link rel="icon" href="/logo.svg" type="image/svg+xml" />
+        <!-- 不写内置品牌资源：首屏必须品牌中性，favicon 由 use-appearance-store 解析出外观后写入。
+             空 data URL 只是为了不让浏览器去请求 /favicon.ico（那会是一条 404）。 -->
+        <link rel="icon" href="data:," />
         <title>正在加载</title>
         <style>
             /* Fix layer order before production chunks can register utilities ahead of base. */
diff --git a/web/test/app-icon-neutral-bootstrap.test.ts b/web/test/app-icon-neutral-bootstrap.test.ts
new file mode 100644
index 000000000..7d6afcdbe
--- /dev/null
+++ b/web/test/app-icon-neutral-bootstrap.test.ts
@@ -0,0 +1,22 @@
+import { describe, expect, test } from "bun:test";
+import { readFileSync } from "node:fs";
+
+const readProjectFile = (relative: string) => readFileSync(new URL(`../${relative}`, import.meta.url), "utf8");
+
+// 首屏必须品牌中性：静态的 /logo.svg 会让自定义品牌部署在标签页上先闪一下内置 logo，
+// 而 favicon 本来就由 use-appearance-store 在解析出外观后写入。空 data URL 只是占位，
+// 避免浏览器去请求 /favicon.ico（那是一条 404）。
+describe("app icon bootstrap", () => {
+    const indexHtml = readProjectFile("index.html");
+    const appearanceStore = readProjectFile("src/stores/use-appearance-store.ts");
+
+    test("index.html declares a neutral placeholder icon instead of the built-in brand", () => {
+        expect(indexHtml).toContain('<link rel="icon" href="data:," />');
+        expect(indexHtml).not.toContain('<link rel="icon" href="/logo.svg"');
+    });
+
+    test("the appearance store remains the single writer of the favicon", () => {
+        expect(appearanceStore).toContain('link[rel~="icon"]');
+        expect(appearanceStore).toContain("favicon.href = appearanceLogoURL(");
+    });
+});