5 files changed, 86 insertions, 0 deletions
diff --git a/docs/evidence/p79-analysis.txt b/docs/evidence/p79-analysis.txt
new file mode 100644
index 0000000..17bd159
--- /dev/null
+++ b/docs/evidence/p79-analysis.txt
@@ -0,0 +1,14 @@
+P78（夜晚氛围与场景细节）证据分析 — 真实 Desktop xvfb 1280x720，同日同机位 正午 vs 22 时
+近黑阈值 24；实心块 = 24x24 全近黑。
+
+day lantern=0.00（须 0.00）
+night glint stripe=141.2 ctl_mean=77.6 ctl_std=4.4 delta=63.5
+water bbox std: day=24.0 night=32.3
+night near-black frac=0.007 max24blk=184
+smoke region mean: day=100.6 night=146.8 delta=46.2 smoke_alpha=182
+bridge ring diff: day=-5.7 night=24.5
+day vs night differing_pixels=921599
+
+verdict=PASS
+  夜帧光斑对比/非光斑平整、水面层次不低于白天、无铁板一块；
+  炊烟夜帧更醒目、桥头窄光晕仅夜帧出现；白天 lantern=0 且两帧有差异。
diff --git a/docs/evidence/p79-day-noon.png b/docs/evidence/p79-day-noon.png
new file mode 100644
index 0000000..f0f9126
--- /dev/null
+++ b/docs/evidence/p79-day-noon.png
diff --git a/docs/evidence/p79-log.txt b/docs/evidence/p79-log.txt
new file mode 100644
index 0000000..9a91c46
--- /dev/null
+++ b/docs/evidence/p79-log.txt
@@ -0,0 +1,51 @@
+world-mode=riverscape bounds=256x192
+mode=keyboard seed=42
+controls=WASD move E interact 1-6 choose Q observe Tab needs C chronicle L relations P pause F1/F2/F3 speed F6 save F7 load Esc close/exit
+fps=61.0 tick=0 pos=(4112,3088)
+fps=60.0 tick=0 pos=(4112,3088)
+splash=done frame=150
+menu=occupation-select
+new-game=ok seed=42 npcs=30 occupation=农夫 tick=0
+p78-shot=day hour=12.0 tick=2592000 lantern=0.00 water=-16,280,1312,96 glints=252 smoke=4 bridge_halo=16
+p78-regions day glint_src=-1,-1 glint_ctl=-1,-1 bridge_src=-1,-1
+p78-shot=day hour=12.0 tick=2592000 lantern=0.00 water=-16,280,1312,96 glints=252 smoke=4 bridge_halo=16
+p78-regions day glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=day hour=12.0 tick=2592000 lantern=0.00 water=-16,280,1312,96 glints=252 smoke=4 bridge_halo=16
+p78-regions day glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=day hour=12.0 tick=2592000 lantern=0.00 water=-16,280,1312,96 glints=252 smoke=4 bridge_halo=16
+p78-regions day glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-frame=p78-day tick=2592000 camera=(6352,4328)
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-shot=night hour=22.0 tick=4752000 lantern=1.00 water=-16,280,1312,96 smoke_src=656,344 smoke_alpha=182 smoke_cell=32 glint_alpha=124
+p78-regions night glint_src=176,280 glint_ctl=208,280 bridge_src=592,280
+p78-frame=p78-night tick=4752000 camera=(6352,4328)
+p78-shot=done
diff --git a/docs/evidence/p79-metrics.txt b/docs/evidence/p79-metrics.txt
new file mode 100644
index 0000000..5d059ba
--- /dev/null
+++ b/docs/evidence/p79-metrics.txt
@@ -0,0 +1,21 @@
+P79 夜帧整改量化对比（真实 Desktop xvfb 1280x720，同机位正午 vs 22 时）
+
+对照基准：P78 帧（docs/evidence/p78-*.png）与 P78 分析（docs/evidence/p78-analysis.txt）。
+白天帧一致性：p79 正午帧与 p78 正午帧逐像素完全相同（day frames identical=True）→ 白天零回归。
+
+1) 夜帧炊烟可见度（烟囱烟柱区 x648..696, y300..380 的「夜-昼」亮度贡献；对照列 x848..896 不变）
+   - 强光像素数（贡献 ≥ 80）：181（P78）→ 1171（P79），约 ×6.5
+   - 峰值贡献：112（P78）→ 173（P79）
+   - 烟柱区净贡献均值（plume-ctrl）：76.0（P78）→ 86.5（P79）
+   - analyze-p78.py「炊烟区均值 夜-昼」：43.2（P78）→ 46.2（P79）
+   做法：夜帧烟柱 4 段向上堆叠（每段抬升 10px、整格 32px、alpha 180+75）+ 中性柔光团外发光
+   （半径 12）+ 暖色外发光（半径 30）；全部只在夜帧叠加层，白天不改。
+
+2) 光晕重叠面积（「夜-昼」亮度贡献 ≥ 60 的像素数，近似多光源叠在一起的一团面积）
+   - 全屏：15477（P78）→ 9926（P79），−35.9%
+   - 中央区（x320..960, y200..520）：15184（P78）→ 9633（P79），−36.6%
+   做法：每光源光晕改为最多 2 层视觉层（内芯 2 圈 + 空心外环），芯/环之间留一圈确定暗隙
+   （同排 dy=0 不被任何图元覆盖），半径 4→3 tile，峰值 150→118；旧的多圈填充叠一团已移除。
+
+3) analyze-p78.py 复跑：verdict=PASS（光斑对比 63.5、非光斑水面 std 4.4、水面 bbox std 夜 32.3 ≥ 昼 24.0、
+   近黑 0.007 无实心 24×24 块、桥头环带差 夜 24.5 / 昼 -5.7、day lantern=0.00）。
diff --git a/docs/evidence/p79-night.png b/docs/evidence/p79-night.png
new file mode 100644
index 0000000..d4dac39
--- /dev/null
+++ b/docs/evidence/p79-night.png