diff --git a/stress/serp-dualpath-optimize.ts b/stress/serp-dualpath-optimize.ts
index 0f17073..5d83435 100644
--- a/stress/serp-dualpath-optimize.ts
+++ b/stress/serp-dualpath-optimize.ts
@@ -191,15 +191,20 @@ function controlTick(): Record<string, unknown> | null {
   const successS = wS.sent > 0 ? wS.ok / wS.sent : 1;
   const infraFails = wH.httpErr + wH.netErr + (from < 60 ? wH.poolEmpty : 0);
   const googleNoiseS = wS.captcha + wS.gate;
+  // v5.5:入段/续砍用 10min 短窗「现役」我方故障证据 —— dp7f 实测:30min 窗里 6 个
+  // 零星 httpErr 在 420/时 captcha 灾难波次下持续解锁硬规则,级联到 8/min;现役证据
+  // 才配得上「正在发生的我方故障」。混合证据(联合噪声 >8)时地板抬到 SOFT_FLOOR,
+  // 杜绝 dp7d 式「2 个伴生池空解锁硬地板 8」
+  const infraFailsS = wS.httpErr + wS.netErr + (from < 60 ? wS.poolEmpty : 0);
   const trickle = infraFails === 0 && googleNoiseS <= 6;
   if (success >= 0.99 || (trickle && successS >= 0.96)) degraded = false;
-  const entry = !degraded && !trickle && infraFails >= 3 && ((success < 0.99 && fails >= 8 && tot >= 200) || (success < 0.96 && fails >= 4));
-  const ongoing = degraded && wS.sent >= 30 && successS < 0.96 && infraFails >= 3 && allFails - failsAtLastCut >= 2;
+  const entry = !degraded && !trickle && infraFailsS >= 2 && ((success < 0.99 && fails >= 8 && tot >= 200) || (success < 0.96 && fails >= 4));
+  const ongoing = degraded && wS.sent >= 30 && successS < 0.96 && infraFailsS >= 2 && allFails - failsAtLastCut >= 2;
   if (entry || ongoing) {
     degraded = true;
     failsAtLastCut = allFails;
     to = success < 0.96 ? from * 0.5 : from * 0.7;
-    to = Math.max(HARD_FLOOR, to);
+    to = Math.max(googleNoiseS > 8 ? SOFT_FLOOR : HARD_FLOOR, to);
     reason = `success=${(success * 100).toFixed(1)}%<${success < 0.96 ? 96 : 99}%(失败 ${fails}${entry ? "" : ";短窗<96%+新失败≥2"}) ×${success < 0.96 ? 0.5 : 0.7}`;
   } else {
     // 软信号(v5.4:仅剩池空,且仅低速期 —— 高速期池空是需求伴生现象,温池自补,