diff --git a/backend-java/src/test/java/com/nanri/aiimage/modules/appearancepatent/service/support/AppearancePatentResultFormatTest.java b/backend-java/src/test/java/com/nanri/aiimage/modules/appearancepatent/service/support/AppearancePatentResultFormatTest.java
new file mode 100644
index 00000000..ecca3e17
--- /dev/null
+++ b/backend-java/src/test/java/com/nanri/aiimage/modules/appearancepatent/service/support/AppearancePatentResultFormatTest.java
@@ -0,0 +1,110 @@
+package com.nanri.aiimage.modules.appearancepatent.service.support;
+
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * task-218（离线可收部分）：结果文件格式契约（真实 Sheet builder 纯调用）。
+ *
+ * 调 AppearancePatentSheetBuilder 在内存 Workbook 生成 Sheet，断言 Sheet 名、主表列序、
+ * 原因表列名冻结、空行也能产出（空结果文件）；文件名 `<stem>-result.xlsx` 与 ZIP 结构
+ * 由运行时组装/上传环节生成，依赖真实流水线（env-gated 部分另行验证）。
+ */
+class AppearancePatentResultFormatTest {
+
+    private static Workbook build() {
+        Workbook wb = new XSSFWorkbook();
+        AppearancePatentSheetBuilder.buildResultSheet(wb, List.of(), Map.of());
+        return wb;
+    }
+
+    private static List<String> expectedMainHeaders() {
+        List<String> headers = new ArrayList<>(AppearancePatentSheetBuilder.RESULT_HEADERS);
+        headers.add(6, "标题");
+        headers.add(7, "图片链接");
+        headers.add(8, "sku");
+        return headers;
+    }
+
+    @Test
+    void mainSheetNameFrozen() throws Exception {
+        try (Workbook wb = build()) {
+            assertNotNull(wb.getSheet("外观专利检测结果"), "主 Sheet 名应冻结为 外观专利检测结果");
+        }
+    }
+
+    @Test
+    void reasonSheetNameFrozen() throws Exception {
+        try (Workbook wb = build()) {
+            assertNotNull(wb.getSheet("原因"), "原因 Sheet 名应冻结为 原因");
+        }
+    }
+
+    @Test
+    void mainHeaderColumnOrderMatchesContract() throws Exception {
+        try (Workbook wb = build()) {
+            Sheet sheet = wb.getSheet("外观专利检测结果");
+            Row header = sheet.getRow(0);
+            List<String> actual = new ArrayList<>();
+            for (int i = 0; i < header.getLastCellNum(); i++) {
+                actual.add(header.getCell(i).getStringCellValue());
+            }
+            assertEquals(expectedMainHeaders(), actual, "主表列序应与 RESULT_HEADERS + 标题/图片链接/sku 一致");
+        }
+    }
+
+    @Test
+    void reasonHeaderColumnsFrozen() throws Exception {
+        try (Workbook wb = build()) {
+            Sheet reason = wb.getSheet("原因");
+            Row header = reason.getRow(0);
+            assertEquals("ASIN", header.getCell(0).getStringCellValue());
+            assertEquals("外观原因", header.getCell(1).getStringCellValue());
+            assertEquals("专利原因", header.getCell(2).getStringCellValue());
+            assertEquals("标题原因", header.getCell(3).getStringCellValue());
+        }
+    }
+
+    @Test
+    void emptyRowsStillGenerateSheets() throws Exception {
+        try (Workbook wb = build()) {
+            assertNotNull(wb.getSheet("外观专利检测结果"));
+            assertNotNull(wb.getSheet("原因"));
+            assertEquals(0, wb.getSheet("外观专利检测结果").getPhysicalNumberOfRows() - 1,
+                    "空行时应仅表头，无数据行抛错");
+        }
+    }
+
+    @Test
+    void resultHeadersConstantDefinesBrandColumns() throws Exception {
+        List<String> headers = AppearancePatentSheetBuilder.RESULT_HEADERS;
+        assertTrue(headers.contains("品牌") && headers.contains("价格") && headers.contains("结论")
+                && headers.contains("状态"), "RESULT_HEADERS 应含 品牌/价格/结论/状态");
+    }
+
+    @Test
+    void firstColumnIsRowId() throws Exception {
+        List<String> headers = expectedMainHeaders();
+        assertEquals("id", headers.get(0), "首列应为 id");
+        assertEquals("asin", headers.get(1));
+    }
+
+    @Test
+    void columnCountMatchesContract() throws Exception {
+        try (Workbook wb = build()) {
+            int headerCount = wb.getSheet("外观专利检测结果").getRow(0).getLastCellNum();
+            assertEquals(expectedMainHeaders().size(), headerCount, "列数应与契约表头一致");
+        }
+    }
+}