v0.1.29: 续命——第四轮全量审计歼灭（2014 全绿）

【P0-A 续代断链（3seed×183年实测：170 年零出生老人院）——本轮最重】
- 生育窗随境界延长（化神 300+ 可育）；天年=min(span,200)（850 寿元永不达的死亡回归）
- 族外婚注入（媒人枯竭引外姓——0.1.1 至今缺失的最后一环）
- 全局年胎 cap（≤18 人年 3 胎/18-24 1 胎/>24 停）→ 稳态 ~25 人、gens 3、2200 月 420ms
- 确定性回归：inlaw 判定长度化+单一 chance（修复过程中的真 bug——det 二分锁定）

【P1 七件】legacypass 年锚（同一年 12 连发 224 次实测）/敌强度相对化（0.35+rel×0.55，
cap 2.6——5000+ 战力零风险碾压的定锚）/eventRoll 插件权重防垄断（>核心 50% 压缩）/
allEvents 按 enabled 过滤（禁用 MOD 事件双闸全面兑现）/bundle 全量导入（modParseAll 导出 2 回 2）/
chronicle 表治理（write-only→no-op）/Stash 并发（open in-flight 去重+save try）
+ PluginManager catch 全回滚 + about 版本统一

【P2 群】decline 150 激活生灭/化神月俸 20 石泄灵石死水/灾因 brief+descOf 接线/
worldGenMods 落空/EventModal 文案对齐/LegacyPanel 恒等清理

【测试】70 套件 2014 全绿（audit-0.1.29 六例：人口曲线/传薪年锚/强度公式/bundle 全量/异常回滚/灾因 brief）；
【金钟罩】0.1.29 基线重算（续代/战斗/事件数值受控变更）；build 通过

src/renderer/game/engine/runtime/Systems/marriage.ts

@@ -4,6 +4,7 @@ import { produceOffspring } from './cultivation'
 import { yearGrowth } from './diplomacy'
 import { MALE_GIVEN, FEMALE_GIVEN } from '../../kernel/names'
 import { aspirationById } from '../../../data/aspirations'
+import { lifespanOf } from './lifecycle'
 
 export function yearStartMarriage(w: World): void {
   yearGrowth(w)
@@ -15,18 +16,30 @@ export function yearStartMarriage(w: World): void {
   const couples = buildCouples(w)
 
   // 族内夫妇
+  let yearBirths = 0
+  const pop = Object.values(s.members).filter((m) => m.alive).length
   for (const couple of couples.internal) {
     const [a, b] = couple
     const father = a.gender === 'male' ? a : b
     const mother = a.gender === 'male' ? b : a
     const fatherAge = w.ageOf(father)
     const motherAge = w.ageOf(mother)
-    if (fatherAge < 18 || fatherAge > 52 || motherAge < 16 || motherAge > 46) continue
+    // P0-A 续代：生育窗随境界延长（高境界者容颜常驻、生育期延）
+    const fatherLife = lifespanOf(w, father)
+    const motherLife = lifespanOf(w, mother)
+    const fatherMax = Math.min(520, 52 + (fatherLife - 75) * 0.35)
+    const motherMax = Math.min(520, 46 + (motherLife - 75) * 0.35)
+    if (fatherAge < 18 || fatherAge > fatherMax || motherAge < 16 || motherAge > motherMax) continue
     const offspringBonus = Object.values(s.members)
       .filter((m) => m.alive && aspirationById(m.aspiration)?.effect.type === 'offspring')
       .length * 0.05
-    const p = birthBase * (0.75 + mother.physique * 0.05) + offspringBonus
+    // P0-A 人口卫生：生育率稳定在 0.2~0.35/对/年；家族进入大龄期再衰减（防指数爆炸）
+    // P0-A 人口卫生（终版）：全局年胎 cap 按人口档——小族多生、大族停育（稳态 ~20 人防爆炸）
+    if (yearBirths >= 3 || pop > 24) continue
+    if (pop > 18 && yearBirths >= 1) continue
+    const p = Math.min(0.6, birthBase * 0.35 * (0.75 + mother.physique * 0.05)) + offspringBonus
     if (!w.rng.chance(p)) continue
+    yearBirths++
     const gen = Math.max(father.generation, mother.generation) + 1
     const first = produceOffspring(w, { father, mother, generation: gen, bornYear: s.year, surname: fam.surname })
     w.addMember(first, father, mother)
@@ -42,11 +55,12 @@ export function yearStartMarriage(w: World): void {
     w.log('good', `${fam.surname}家诞下新丁：${first.name}。`)
   }
 
-  // 联姻外孙来投（男方娶亲：妻室携子来归；或女儿携子回门）
+  // 联姻外孙来投（男方娶亲：妻室携子来归；或女儿携子回门）——与族内育共用人口 cap
   for (const member of Object.values(s.members)) {
     if (!member.alive || !member.spouseHouse) continue
     const age = w.ageOf(member)
     if (age < 18 || age > 44) continue
+    if (yearBirths >= 2 || pop > 24) continue
     if (!w.rng.chance(0.15)) continue
     const gen = member.generation + 1
     const house = member.spouseHouse
@@ -78,6 +92,29 @@ export function yearStartMarriage(w: World): void {
       const age = w.ageOf(c)
       return age >= 16 && age <= 42
     })
+  // P0-A 族外婚注入：仅当真实缺口（适龄异性为 0）+ 人口上限（确定性判定=长度）
+  const aliveM = w.aliveMembers().length
+  const inlawNeeded =
+    aliveM < 24 &&
+    men.length > 0 && women.length === 0 && w.rng.chance(0.8)
+  const inlawFemaleNeeded =
+    aliveM < 24 &&
+    women.length > 0 && men.length === 0 && w.rng.chance(0.8)
+  if (inlawNeeded || inlawFemaleNeeded) {
+    const gender = inlawNeeded ? 'female' : 'male'
+    const inlaw = produceOffspring(w, {
+      father: null,
+      mother: null,
+      generation: 1,
+      bornYear: s.year - (18 + w.rng.int(0, 10)),
+      surname: '远' as never
+    })
+    inlaw.spouseHouse = '外姓'
+    w.addMember(inlaw)
+    if (gender === 'male') men.push(inlaw)
+    else women.push(inlaw)
+    w.log('info', `媒人引介一位${gender === 'male' ? '外姓男' : '外姓女'}士入族相亲。`)
+  }
   for (const m of men) {
     if (w.rng.chance(0.55) && women.length > 0) {
       const candidate = women.filter(