diff --git a/server/src/main/java/com/emotion/service/impl/ShortNovelServiceImpl.java b/server/src/main/java/com/emotion/service/impl/ShortNovelServiceImpl.java
index 38f3cc9..ee90e46 100644
--- a/server/src/main/java/com/emotion/service/impl/ShortNovelServiceImpl.java
+++ b/server/src/main/java/com/emotion/service/impl/ShortNovelServiceImpl.java
@@ -307,6 +307,15 @@ public class ShortNovelServiceImpl implements ShortNovelService {
                                 long eventTimestamp = System.currentTimeMillis();
                                 log.info("[ShortNovel SSE] 处理事件: type={}, timestamp={}", type, eventTimestamp);
 
+                                // 从事件顶层取 session_id 同步 sessionId
+                                // 上游事件结构与前端对齐：session_id 与 type 同级，不在 payload 内
+                                // 修复：首次 stream 里 status 处理从 payload 取不到 session_id，导致 currentSessionId 保持 null，
+                                // 第一个 clarification_card 因 sessionId 为 null 不累积，详情页少显示第一个选项卡
+                                String topSessionId = event.getString("session_id");
+                                if (topSessionId != null && !topSessionId.isEmpty()) {
+                                    currentSessionId[0] = topSessionId;
+                                }
+
                                 // 拦截 status 事件，缓存 sessionId → originalQuery 映射（供 followup 兜底）
                                 if ("status".equals(type)) {
                                     JSONObject payload = event.getJSONObject("payload");