diff --git a/service/src/main/java/cn/qihangerp/service/external/pdd/PddCatRuleSpecAutoResolver.java b/service/src/main/java/cn/qihangerp/service/external/pdd/PddCatRuleSpecAutoResolver.java
index 2c6553bd..b738dd89 100644
--- a/service/src/main/java/cn/qihangerp/service/external/pdd/PddCatRuleSpecAutoResolver.java
+++ b/service/src/main/java/cn/qihangerp/service/external/pdd/PddCatRuleSpecAutoResolver.java
@@ -51,7 +51,8 @@ public class PddCatRuleSpecAutoResolver {
             }
             Long parentSpecId = PddOpenApiSupport.findFirstSaleParentSpecId(raw);
             if (parentSpecId == null || parentSpecId <= 0) {
-                r.setDetail("类目规则中未解析到销售 parent_spec_id");
+                r.setDetail("类目规则中未解析到销售 parent_spec_id"
+                        + PddOpenApiSupport.suffixHintForMissingSaleParentSpec(raw));
                 return r;
             }
             List<ExternalPddProperties.PddSkuOverride> ovs = buildSkuOverridesBySpecName(
diff --git a/service/src/main/java/cn/qihangerp/service/external/pdd/PddOpenApiSupport.java b/service/src/main/java/cn/qihangerp/service/external/pdd/PddOpenApiSupport.java
index a7d5080d..ae0f9314 100644
--- a/service/src/main/java/cn/qihangerp/service/external/pdd/PddOpenApiSupport.java
+++ b/service/src/main/java/cn/qihangerp/service/external/pdd/PddOpenApiSupport.java
@@ -8,7 +8,9 @@ import org.springframework.util.StringUtils;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * 解析拼多多 POP 返回 JSON 的通用工具。
@@ -139,7 +141,10 @@ public final class PddOpenApiSupport {
     }
 
     /**
-     * 在类目规则 JSON 中递归查找 is_sale 为 true 的节点上的 parent_spec_id（取第一个）。
+     * 在类目规则 JSON 中解析「销售规格」对应的 {@code parent_spec_id}（取第一个）。
+     * <p>兼容：{@code is_sale}/{@code isSale}、{@code parent_spec_id}/{@code parentSpecId}/字符串数值；
+     * 若整树未命中，再尝试 {@code goods_properties_rule.properties}、常见 {@code goods_spec_rule} 等数组；
+     * 若全树仅出现<strong>一个</strong>不同的 {@code parent_spec_id}，则采用（单规格维度类目）。</p>
      */
     public static Long findFirstSaleParentSpecId(String catRuleBody) {
         if (!StringUtils.hasText(catRuleBody)) {
@@ -150,30 +155,182 @@ public final class PddOpenApiSupport {
             if (root == null) {
                 return null;
             }
-            JSONObject inner = root.getJSONObject("goods_cat_rule_get_response");
+            JSONObject inner = unwrapCatRulePayload(root);
             if (inner == null) {
-                inner = root;
+                return null;
             }
             long[] holder = new long[]{0L};
             walkForSaleParent(inner, holder);
-            return holder[0] > 0 ? holder[0] : null;
+            if (holder[0] > 0) {
+                return holder[0];
+            }
+            Long fromProps = extractParentSpecFromGoodsPropertiesRule(inner);
+            if (fromProps != null && fromProps > 0) {
+                return fromProps;
+            }
+            Long fb = fallbackParentSpecFromSpecRuleArrays(inner);
+            if (fb != null && fb > 0) {
+                return fb;
+            }
+            return uniqueParentSpecIdIfSingle(inner);
         } catch (Exception e) {
             return null;
         }
     }
 
+    /**
+     * 当 {@link #findFirstSaleParentSpecId} 为空时，根据类目规则返回体补充说明与处置建议（例如 {@code input_max_spec_num=0} 的图书属性类目）。
+     */
+    public static String suffixHintForMissingSaleParentSpec(String catRuleBody) {
+        if (!StringUtils.hasText(catRuleBody)) {
+            return "";
+        }
+        try {
+            JSONObject root = JSON.parseObject(catRuleBody);
+            if (root == null) {
+                return "";
+            }
+            JSONObject inner = unwrapCatRulePayload(root);
+            if (inner == null) {
+                return "";
+            }
+            JSONObject gpr = inner.getJSONObject("goods_properties_rule");
+            if (gpr == null) {
+                return "。返回体中无 goods_properties_rule，无法自动解析销售规格；请配置 external.pdd.sku-overrides 或核对类目。";
+            }
+            int maxSpec = gpr.getIntValue("input_max_spec_num");
+            JSONArray props = gpr.getJSONArray("properties");
+            boolean anySale = false;
+            if (props != null) {
+                for (int i = 0; i < props.size(); i++) {
+                    Object el = props.get(i);
+                    if (el instanceof JSONObject p) {
+                        if (isTruthySale(p.get("is_sale")) || isTruthySale(p.get("isSale"))) {
+                            anySale = true;
+                            break;
+                        }
+                    }
+                }
+            }
+            StringBuilder sb = new StringBuilder("。");
+            if (maxSpec == 0) {
+                sb.append(" 拼多多返回 goods_properties_rule.input_max_spec_num=0（不允许商家再增自定义规格维），");
+            }
+            if (!anySale && props != null && !props.isEmpty()) {
+                sb.append(" properties 中无 is_sale=true 的销售规格行（多为书名、ISBN 等普通属性），");
+            }
+            sb.append("无法通过 pdd.goods.spec.id.get 自动生成 SKU 的 spec_id_list。");
+            sb.append(" 请在 external.pdd.sku-overrides 中为每条 SKU 配置 spec-id-list，或改用拼多多侧支持「销售规格」的叶子类目并同步调整 category-map。");
+            return sb.toString();
+        } catch (Exception e) {
+            return "。解析类目规则失败；请配置 external.pdd.sku-overrides 或开启全量日志核对 cat_rule 返回结构。";
+        }
+    }
+
+    /**
+     * POP 成功体多为 {@code goods_cat_rule_get_response}；部分环境为 {@code cat_rule_get_response}（与日志一致）。
+     */
+    private static JSONObject unwrapCatRulePayload(JSONObject root) {
+        if (root == null) {
+            return null;
+        }
+        JSONObject a = root.getJSONObject("goods_cat_rule_get_response");
+        if (a != null) {
+            return a;
+        }
+        JSONObject b = root.getJSONObject("cat_rule_get_response");
+        if (b != null) {
+            return b;
+        }
+        return root;
+    }
+
+    /**
+     * 从 {@code goods_properties_rule.properties} 里找销售属性行上的 {@code parent_spec_id}。
+     */
+    private static Long extractParentSpecFromGoodsPropertiesRule(JSONObject inner) {
+        if (inner == null) {
+            return null;
+        }
+        JSONObject gpr = inner.getJSONObject("goods_properties_rule");
+        if (gpr == null) {
+            return null;
+        }
+        JSONArray props = gpr.getJSONArray("properties");
+        if (props == null || props.isEmpty()) {
+            return null;
+        }
+        for (int i = 0; i < props.size(); i++) {
+            Object el = props.get(i);
+            if (!(el instanceof JSONObject p)) {
+                continue;
+            }
+            boolean sale = isTruthySale(p.get("is_sale")) || isTruthySale(p.get("isSale"));
+            boolean skuRow = p.getBooleanValue("is_sku") || p.getBooleanValue("isSku");
+            if (!sale && !skuRow) {
+                continue;
+            }
+            Long pid = readParentSpecId(p);
+            if (pid != null && pid > 0) {
+                return pid;
+            }
+            JSONObject spec = p.getJSONObject("spec");
+            if (spec != null) {
+                pid = readParentSpecId(spec);
+                if (pid != null && pid > 0) {
+                    return pid;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * 全树收集 {@code parent_spec_id}，仅当恰好一个不同取值时返回（避免多规格维度误选）。
+     */
+    private static Long uniqueParentSpecIdIfSingle(JSONObject inner) {
+        Set<Long> ids = new LinkedHashSet<>();
+        collectAllParentSpecIds(inner, ids);
+        if (ids.size() == 1) {
+            return ids.iterator().next();
+        }
+        return null;
+    }
+
+    private static void collectAllParentSpecIds(Object node, Set<Long> out) {
+        if (node instanceof JSONObject jo) {
+            Long p = readParentSpecId(jo);
+            if (p != null && p > 0) {
+                out.add(p);
+            }
+            for (String k : jo.keySet()) {
+                collectAllParentSpecIds(jo.get(k), out);
+            }
+        } else if (node instanceof JSONArray ja) {
+            for (int i = 0; i < ja.size(); i++) {
+                collectAllParentSpecIds(ja.get(i), out);
+            }
+        }
+    }
+
     private static void walkForSaleParent(Object node, long[] holder) {
         if (holder[0] > 0) {
             return;
         }
         if (node instanceof JSONObject jo) {
-            if (isTruthySale(jo.get("is_sale"))) {
-                Long p = jo.getLong("parent_spec_id");
+            boolean sale = isTruthySale(jo.get("is_sale")) || isTruthySale(jo.get("isSale"));
+            if (sale) {
+                Long p = readParentSpecId(jo);
                 if (p != null && p > 0) {
                     holder[0] = p;
                     return;
                 }
             }
+            Long pid = readParentSpecId(jo);
+            if (pid != null && pid > 0 && (isTruthySale(jo.get("sale")) || isOne(jo.get("spec_type")))) {
+                holder[0] = pid;
+                return;
+            }
             for (String k : jo.keySet()) {
                 walkForSaleParent(jo.get(k), holder);
                 if (holder[0] > 0) {
@@ -190,6 +347,106 @@ public final class PddOpenApiSupport {
         }
     }
 
+    /**
+     * 部分类目返回的销售规格列表在固定 key 下，且字段名与递归路径不一致时在此补解析。
+     */
+    private static Long fallbackParentSpecFromSpecRuleArrays(JSONObject inner) {
+        if (inner == null) {
+            return null;
+        }
+        String[] arrayKeys = {
+                "goods_spec_rule",
+                "goods_spec_rules",
+                "spec_rule_list",
+                "spec_rules",
+                "cat_rule",
+        };
+        for (String key : arrayKeys) {
+            JSONArray arr = findFirstArrayByKey(inner, key);
+            if (arr == null || arr.isEmpty()) {
+                continue;
+            }
+            for (int i = 0; i < arr.size(); i++) {
+                Object el = arr.get(i);
+                if (!(el instanceof JSONObject row)) {
+                    continue;
+                }
+                Long p = readParentSpecId(row);
+                if (p == null || p <= 0) {
+                    continue;
+                }
+                if (isTruthySale(row.get("is_sale")) || isTruthySale(row.get("isSale"))) {
+                    return p;
+                }
+            }
+            JSONObject first = arr.getJSONObject(0);
+            if (first != null) {
+                Long p = readParentSpecId(first);
+                if (p != null && p > 0 && arr.size() == 1) {
+                    return p;
+                }
+            }
+        }
+        return null;
+    }
+
+    private static JSONArray findFirstArrayByKey(JSONObject root, String key) {
+        if (root == null || !StringUtils.hasText(key)) {
+            return null;
+        }
+        JSONArray direct = root.getJSONArray(key);
+        if (direct != null && !direct.isEmpty()) {
+            return direct;
+        }
+        for (String k : root.keySet()) {
+            Object v = root.get(k);
+            if (v instanceof JSONObject child) {
+                JSONArray nested = findFirstArrayByKey(child, key);
+                if (nested != null && !nested.isEmpty()) {
+                    return nested;
+                }
+            }
+        }
+        return null;
+    }
+
+    private static Long readParentSpecId(JSONObject jo) {
+        if (jo == null) {
+            return null;
+        }
+        Long p = jo.getLong("parent_spec_id");
+        if (p != null && p > 0) {
+            return p;
+        }
+        p = jo.getLong("parentSpecId");
+        if (p != null && p > 0) {
+            return p;
+        }
+        String s = jo.getString("parent_spec_id");
+        if (!StringUtils.hasText(s)) {
+            s = jo.getString("parentSpecId");
+        }
+        if (StringUtils.hasText(s)) {
+            try {
+                long v = Long.parseLong(s.trim());
+                return v > 0 ? v : null;
+            } catch (NumberFormatException ignored) {
+                return null;
+            }
+        }
+        return null;
+    }
+
+    private static boolean isOne(Object v) {
+        if (v == null) {
+            return false;
+        }
+        if (v instanceof Number n) {
+            return n.intValue() == 1;
+        }
+        return "1".equals(String.valueOf(v).trim());
+    }
+
     private static boolean isTruthySale(Object v) {
         if (v == null) {
             return false;