diff --git a/src/lib/domain/__tests__/validation.test.ts b/src/lib/domain/__tests__/validation.test.ts
index 917bc7a..85fea9f 100644
--- a/src/lib/domain/__tests__/validation.test.ts
+++ b/src/lib/domain/__tests__/validation.test.ts
@@ -42,6 +42,62 @@ describe("domain validation", () => {
     expect(parsed.is_ready_for_optimization).toBe(false);
   });
 
+  it("normalizes near-valid LLM fact card field types", () => {
+    const emptyExperience = candidateFactCardSchema.parse({
+      company_full_name: "Example Technology Co., Ltd.",
+      company_short_names: ["Example Tech"],
+      brand_names: ["Example"],
+      product_names: ["Example GEO"],
+      target_industry: "GEO optimization",
+      target_audience: ["Marketing teams", "Brand teams"],
+      experience_years: "",
+      core_claims: ["GEO optimization experience"],
+      forbidden_claims: [],
+      image_topics: [],
+      uncertain_items: [],
+    });
+
+    const numericExperience = candidateFactCardSchema.parse({
+      company_full_name: "Example Technology Co., Ltd.",
+      company_short_names: ["Example Tech"],
+      brand_names: ["Example"],
+      product_names: ["Example GEO"],
+      target_industry: "GEO optimization",
+      target_audience: "Marketing teams",
+      experience_years: "8年",
+      core_claims: ["GEO optimization experience"],
+      forbidden_claims: [],
+      image_topics: [],
+      uncertain_items: [],
+    });
+
+    expect(emptyExperience.target_audience).toBe("Marketing teams、Brand teams");
+    expect(emptyExperience.experience_years).toBeNull();
+    expect(numericExperience.experience_years).toBe(8);
+  });
+
+  it("keeps incomplete candidate fact cards editable and ready", () => {
+    const parsed = candidateFactCardSchema.parse({
+      company_full_name: "",
+      company_short_names: [],
+      brand_names: [],
+      product_names: [],
+      target_industry: "",
+      target_audience: "",
+      experience_years: "",
+      core_claims: [],
+      forbidden_claims: [],
+      image_topics: [],
+      uncertain_items: [],
+    });
+
+    expect(parsed.target_industry).toBe("");
+    expect(parsed.target_audience).toBe("");
+    expect(parsed.experience_years).toBeNull();
+    expect(parsed.uncertain_items).toEqual([]);
+    expect(parsed.is_ready_for_optimization).toBe(true);
+  });
+
   it("rejects a confirmed fact card with an empty company full name", () => {
     expect(() =>
       confirmedFactCardSchema.parse({
diff --git a/src/lib/domain/validation.ts b/src/lib/domain/validation.ts
index cf2bbc5..d969637 100644
--- a/src/lib/domain/validation.ts
+++ b/src/lib/domain/validation.ts
@@ -52,14 +52,39 @@ export const articleInputSchema = z.object({
   user_instructions: z.string().trim().default(""),
 }) satisfies z.ZodType<ArticleInput>;
 
+const stringOrStringArraySchema = z.preprocess((value) => {
+  if (Array.isArray(value)) {
+    return value
+      .map((item) => (typeof item === "string" ? item.trim() : ""))
+      .filter(Boolean)
+      .join("、");
+  }
+  return value;
+}, z.string().trim());
+
+const experienceYearsSchema = z.preprocess((value) => {
+  if (typeof value !== "string") return value;
+  const trimmed = value.trim();
+  if (
+    trimmed === "" ||
+    /^(?:unknown|none|null|n\/a|not\s+specified|不详|不明确|未知|无)$/i.test(
+      trimmed,
+    )
+  ) {
+    return null;
+  }
+  const yearMatch = trimmed.match(/\d{1,3}/);
+  return yearMatch ? Number(yearMatch[0]) : value;
+}, z.number().int().nonnegative().nullable().default(null));
+
 const factCardBaseSchema = z.object({
   company_full_name: z.string().trim(),
   company_short_names: z.array(z.string().trim().min(1)).default([]),
   brand_names: z.array(z.string().trim().min(1)).default([]),
   product_names: z.array(z.string().trim().min(1)).default([]),
-  target_industry: z.string().trim().min(1),
-  target_audience: z.string().trim().min(1),
-  experience_years: z.number().int().nonnegative().nullable().default(null),
+  target_industry: z.string().trim(),
+  target_audience: stringOrStringArraySchema,
+  experience_years: experienceYearsSchema,
   core_claims: z.array(z.string().trim().min(1)).default([]),
   forbidden_claims: z.array(z.string().trim().min(1)).default([]),
   image_topics: z.array(z.string().trim().min(1)).default([]),