diff --git a/laf-cloud/functions/SignInActivity.ts b/laf-cloud/functions/SignInActivity.ts
index e93d591..bcb1ef7 100644
--- a/laf-cloud/functions/SignInActivity.ts
+++ b/laf-cloud/functions/SignInActivity.ts
@@ -45,6 +45,17 @@ export function getChinaDateKey(now = Date.now()) {
   return String(Math.floor((now + UTC_8_OFFSET_MS) / DAY_MS));
 }
 
+export function getUserSignInTriggerLevel(user: any, config: SignInActivityConfig): number {
+  let assignments = user?.abTests;
+  if (typeof assignments === "string") {
+    try { assignments = JSON.parse(assignments); } catch { assignments = null; }
+  }
+  const assignment = assignments?.layer_1;
+  const isNewPlayerB = !!assignment && assignment.name === "new1_50" && assignment.enabled !== false
+    && ["B", "2"].includes(String(assignment.group).toUpperCase());
+  return isNewPlayerB ? 15 : Number(config.triggerLevel);
+}
+
 export function getUserSignInLevel(user: any) {
   const level = Number(user?.levelAmount);
   return Number.isFinite(level) && level > 0 ? level : 0;
@@ -133,7 +144,7 @@ export async function activateSignInActivity(user: any, now = Date.now()) {
     return { activated: false, state: normalizeSignInState(user?.signInActivity), config: null };
   }
   const config = await getActiveSignInConfig();
-  if (!config || getUserSignInLevel(user) < Number(config.triggerLevel)) {
+  if (!config || getUserSignInLevel(user) < getUserSignInTriggerLevel(user, config)) {
     return { activated: false, state: null, config };
   }
   const startAt = getChinaDayStart(now);
diff --git a/laf-cloud/functions/userLevel.ts b/laf-cloud/functions/userLevel.ts
index 65dad2f..67a8b06 100644
--- a/laf-cloud/functions/userLevel.ts
+++ b/laf-cloud/functions/userLevel.ts
@@ -52,7 +52,18 @@ export default async function (ctx: FunctionContext) {
         count = 1;
         return;
       }
-      let add = oldAdd + count;
+      // B组前15关只推进主线；补报跨过15关时也只计算门槛之后的胜利。
+      let assignments = res1.data?.abTests;
+      if (typeof assignments === "string") {
+        try { assignments = JSON.parse(assignments); } catch { assignments = null; }
+      }
+      const assignment = assignments?.layer_1;
+      const isNewPlayerB = !!assignment && assignment.name === "new1_50" && assignment.enabled !== false
+        && ["B", "2"].includes(String(assignment.group).toUpperCase());
+      const careerCount = isNewPlayerB
+        ? Math.max(levelAmount - 15, 0) - Math.max(oldlevelAmount - 15, 0)
+        : count;
+      let add = oldAdd + careerCount;
       let isWhite = res1.data?.isWhite;
       let careerAmount = res1.data?.careerAmount || 0;
       if (isWuXian == "true") {