diff --git a/backend-java/src/main/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataService.java b/backend-java/src/main/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataService.java
index 92ab9138..36a05a66 100644
--- a/backend-java/src/main/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataService.java
+++ b/backend-java/src/main/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataService.java
@@ -1131,8 +1131,8 @@ public class DedupeTotalDataService {
     }
 
     private static final List<String> COUNTRY_CODE_MAP = List.of(
-            "DE", "UK", "FR", "IT", "ES", "US",
-            "美国", "德国", "英国", "法国", "意大利", "西班牙");
+            "DE", "UK", "FR", "IT", "ES",
+            "德国", "英国", "法国", "意大利", "西班牙");
 
     private String normalizeCountryCode(String raw) {
         String upper = normalizeExcelText(raw).toUpperCase(Locale.ROOT);
@@ -1144,16 +1144,11 @@ public class DedupeTotalDataService {
                 .replace("FRANCE", "FR")
                 .replace("ITALY", "IT")
                 .replace("SPAIN", "ES")
-                .replace("USA", "US")
-                .replace("UNITED STATES", "US")
-                .replace("UNITEDSTATES", "US")
-                .replace("AMERICA", "US")
                 .replace("德国", "DE")
                 .replace("英国", "UK")
                 .replace("法国", "FR")
                 .replace("意大利", "IT")
-                .replace("西班牙", "ES")
-                .replace("美国", "US");
+                .replace("西班牙", "ES");
     }
 
     /** 将国家列单元格内容解析为标准国家代码（去重后按出现顺序），无有效国家返回 null。 */
diff --git a/backend-java/src/main/resources/db/V90__add_variant_collection_app_menu.sql b/backend-java/src/main/resources/db/V90__add_variant_collection_app_menu.sql
new file mode 100644
index 00000000..4725ed32
--- /dev/null
+++ b/backend-java/src/main/resources/db/V90__add_variant_collection_app_menu.sql
@@ -0,0 +1,17 @@
+-- Register the existing legacy static page in the APP permission menu.
+-- The route_path is the menu slug; the page URL is /web_source/variant-collection.html.
+INSERT INTO `columns` (`name`, `column_key`, `menu_type`, `route_path`, `sort_order`, `parent_id`)
+SELECT 'ASIN变体采集', 'variant-collection', 'app', 'variant-collection', 118,
+       (SELECT id FROM `columns` WHERE `column_key` = 'brand_front_tools' LIMIT 1)
+WHERE NOT EXISTS (
+    SELECT 1 FROM `columns` WHERE `column_key` = 'variant-collection'
+);
+
+UPDATE `columns` AS child
+JOIN `columns` AS parent ON parent.`column_key` = 'brand_front_tools'
+SET child.`name` = 'ASIN变体采集',
+    child.`menu_type` = 'app',
+    child.`route_path` = 'variant-collection',
+    child.`sort_order` = 118,
+    child.`parent_id` = parent.`id`
+WHERE child.`column_key` = 'variant-collection';
diff --git a/backend-java/src/main/resources/db/V91__dedupe_total_data_country.sql b/backend-java/src/main/resources/db/V91__dedupe_total_data_country.sql
new file mode 100644
index 00000000..2d43deed
--- /dev/null
+++ b/backend-java/src/main/resources/db/V91__dedupe_total_data_country.sql
@@ -0,0 +1,33 @@
+SET @country_col_exists := (
+    SELECT COUNT(*)
+    FROM information_schema.COLUMNS
+    WHERE TABLE_SCHEMA = DATABASE()
+      AND TABLE_NAME = 'biz_dedupe_total_data'
+      AND COLUMN_NAME = 'country'
+);
+
+SET @sql_add_country := IF(
+    @country_col_exists = 0,
+    'ALTER TABLE biz_dedupe_total_data ADD COLUMN country VARCHAR(64) DEFAULT NULL COMMENT ''国家代码，逗号分隔，如 DE,UK'' AFTER data_value',
+    'SELECT 1'
+);
+PREPARE stmt_add_country FROM @sql_add_country;
+EXECUTE stmt_add_country;
+DEALLOCATE PREPARE stmt_add_country;
+
+SET @country_idx_exists := (
+    SELECT COUNT(*)
+    FROM information_schema.STATISTICS
+    WHERE TABLE_SCHEMA = DATABASE()
+      AND TABLE_NAME = 'biz_dedupe_total_data'
+      AND INDEX_NAME = 'idx_country'
+);
+
+SET @sql_add_country_idx := IF(
+    @country_idx_exists = 0,
+    'ALTER TABLE biz_dedupe_total_data ADD INDEX idx_country (country)',
+    'SELECT 1'
+);
+PREPARE stmt_add_country_idx FROM @sql_add_country_idx;
+EXECUTE stmt_add_country_idx;
+DEALLOCATE PREPARE stmt_add_country_idx;
diff --git a/backend-java/src/test/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataServiceTest.java b/backend-java/src/test/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataServiceTest.java
index db693eb2..56c77e5e 100644
--- a/backend-java/src/test/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataServiceTest.java
+++ b/backend-java/src/test/java/com/nanri/aiimage/modules/dedupe/service/DedupeTotalDataServiceTest.java
@@ -202,7 +202,8 @@ class DedupeTotalDataServiceTest {
         assertEquals(1, result.getInsertedCount());
         ArgumentCaptor<List<DedupeTotalDataEntity>> captor = ArgumentCaptor.forClass(List.class);
         verify(dedupeTotalDataMapper).insertBatchIgnore(captor.capture());
-        assertEquals("DE,US,UK", captor.getValue().getFirst().getCountry());
+        // US 不在五国范围内，应被过滤掉
+        assertEquals("DE,UK", captor.getValue().getFirst().getCountry());
     }
 
     @Test
diff --git a/backend/static/admin.js b/backend/static/admin.js
index 729d4a80..55498f9e 100644
--- a/backend/static/admin.js
+++ b/backend/static/admin.js
@@ -2192,7 +2192,7 @@
             }
             function getDedupeTotalDataCountryLabel(countryCodes) {
                 var countryLabels = {
-                    DE: '德国', UK: '英国', FR: '法国', IT: '意大利', ES: '西班牙', US: '美国'
+                    DE: '德国', UK: '英国', FR: '法国', IT: '意大利', ES: '西班牙'
                 };
                 if (Array.isArray(countryCodes)) {
                     return countryCodes.map(function (code) { return countryLabels[code] || code; }).join('、');
diff --git a/backend/web_source/admin.html b/backend/web_source/admin.html
index d415f59b..f2ef9acf 100644
--- a/backend/web_source/admin.html
+++ b/backend/web_source/admin.html
@@ -182,6 +182,24 @@
             white-space: nowrap;
         }
 
+        .dedupe-filter-date-row {
+            display: flex;
+            gap: 12px;
+            align-items: flex-end;
+            flex-wrap: wrap;
+            margin-bottom: 16px;
+        }
+
+        .dedupe-filter-date-row .form-group {
+            flex: 0 0 200px;
+            min-width: 0;
+            margin-bottom: 0;
+        }
+
+        .dedupe-filter-date-row .dedupe-filter-actions {
+            margin-left: auto;
+        }
+
         .btn {
             padding: 10px 20px;
             background: #667eea;
@@ -2100,9 +2118,13 @@
                         <option value="FR">法国</option>
                         <option value="IT">意大利</option>
                         <option value="ES">西班牙</option>
-                        <option value="US">美国</option>
                     </select>
                 </div>
+                <div class="dedupe-filter-actions">
+                    <button class="btn" id="btnSearchDedupeTotalData">查询</button>
+                </div>
+            </div>
+            <div class="dedupe-filter-date-row">
                 <div class="form-group">
                     <label>开始日期</label>
                     <input type="date" id="exportDedupeTotalDataStartDate">
@@ -2112,7 +2134,6 @@
                     <input type="date" id="exportDedupeTotalDataEndDate">
                 </div>
                 <div class="dedupe-filter-actions">
-                    <button class="btn" id="btnSearchDedupeTotalData">查询</button>
                     <button class="btn btn-secondary" id="btnExportDedupeTotalData" type="button">导出 XLSX</button>
                 </div>
             </div>
@@ -3188,7 +3209,7 @@
             </div>
         </div>
     </div>
-    <script src="/static/admin.js?v=dedupe-country-1"></script>
+    <script src="/static/admin.js?v=dedupe-country-2"></script>
 </body>
 
 </html>