diff --git a/assets/img/nursery-day.jpg b/assets/img/nursery-day.jpg
new file mode 100644
index 0000000..a311f14
Binary files /dev/null and b/assets/img/nursery-day.jpg differ
diff --git a/assets/img/nursery-night.jpg b/assets/img/nursery-night.jpg
new file mode 100644
index 0000000..1585b5a
Binary files /dev/null and b/assets/img/nursery-night.jpg differ
diff --git a/assets/img/nursery-peek.jpg b/assets/img/nursery-peek.jpg
deleted file mode 100644
index e4b3d65..0000000
Binary files a/assets/img/nursery-peek.jpg and /dev/null differ
diff --git a/index.html b/index.html
index 4da1345..8b629e8 100644
--- a/index.html
+++ b/index.html
@@ -7,7 +7,7 @@
 <meta name="mobile-web-app-capable" content="yes">
 <meta name="apple-mobile-web-app-capable" content="yes">
 <title>兜爸心选 · 孕育陪伴</title>
-<!-- V:26100112 缓存版本标记：改 css/js 时同步 bump 该值（与 js/app.js 的 VER 同源），静态资源按 mtime 走 ETag 自动刷新 -->
+<!-- V:26100113 缓存版本标记：改 css/js 时同步 bump 该值（与 js/app.js 的 VER 同源），静态资源按 mtime 走 ETag 自动刷新 -->
 <link rel="stylesheet" href="mama-box.css">
 <script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
 <!-- 共享助手：授权/跳商城/位置上报（分享卡片同步，见 docs/h5-auth-standard.md 第四节） -->
@@ -462,11 +462,12 @@
              做法：这一块没有底色，是页面上开的一道「空隙」；房间图层（#nypLayer）由 JS 每次滚动都对齐到 .screen 的可视区，
              所以页面往上滚时房间不跟着走，看起来就是铺在整页背后、从缝里露出来（视差）。上下两条内阴影 = 上下模块压在房间上面。
              只有「进去布置」按钮能点（整块不点，免得滚动时误触）。
-             图：assets/img/nursery-peek.jpg 是从 yef/cover-full.png 裁的临时图（390 宽、抹掉了「调试」按钮），
-             已找「3D 婴儿房」会话（33d6c837）要无 UI 的 1125×1500 日/夜两版高清渲染，到了换掉。
-             位置：今天的动线 → 这道空隙 → 书架（首页后半段）。北京时间 19:00–6:00 叠一层夜色。JS 在 app.js nurseryRender()。 -->
+             图：assets/img/nursery-day.jpg / nursery-night.jpg，由「3D 婴儿房」会话（33d6c837）导出的无 UI 渲染
+             （原图 yef/cover-day.png、cover-night.png，1125×1500，这里缩到 750×1000）；里面摆的是演示布置，不是用户自己的房间。
+             底色必须和图边一致：白天 #FFECD8、夜间 #5A5890，否则缝里会露出图片边框。
+             位置：今天的动线 → 这道空隙 → 书架（首页后半段）。北京时间 19:00–6:00 换夜间图（开灯版）。JS 在 app.js nurseryRender()。 -->
         <section class="ny-peek" id="nursery">
-          <div class="nyp-layer" id="nypLayer" aria-hidden="true"><img src="assets/img/nursery-peek.jpg" alt="" decoding="async"></div>
+          <div class="nyp-layer" id="nypLayer" aria-hidden="true"><img id="nypImg" src="assets/img/nursery-day.jpg" alt="" decoding="async"></div>
           <span class="nyp-chip">往里看看 · 3D 婴儿房</span>
           <div class="nyp-bar">
             <div class="nyp-txt"><b id="nyTitle">宝宝的房间</b><span id="nySub">做孕期任务攒兜豆，一件件布置好</span></div>
diff --git a/js/app.js b/js/app.js
index e390097..883721b 100644
--- a/js/app.js
+++ b/js/app.js
@@ -3,7 +3,7 @@
 (function () {
   'use strict';
   /* 页面版本号（YYMMDD+序号）：显示在「关于兜爸心选」页底部；bump 时同步 head 注释与 ?v= */
-  var VER = '26100112';
+  var VER = '26100113';
   const $ = (s, c) => (c || document).querySelector(s);
   const $$ = (s, c) => Array.from((c || document).querySelectorAll(s));
 
@@ -3140,7 +3140,10 @@
     place();
     const tick = () => {
       const h = new Date(Date.now() + 8 * 3600e3).getUTCHours();   // 北京时间
-      sec.classList.toggle('is-night', h >= 19 || h < 6);
+      const night = h >= 19 || h < 6;
+      sec.classList.toggle('is-night', night);
+      const img = $('#nypImg'), src = 'assets/img/nursery-' + (night ? 'night' : 'day') + '.jpg';
+      if (img.getAttribute('src') !== src) img.setAttribute('src', src);
     };
     tick(); setInterval(tick, 600e3);
     nurseryRender();
diff --git a/mama-box.css b/mama-box.css
index bc2dd03..fae12aa 100644
--- a/mama-box.css
+++ b/mama-box.css
@@ -566,9 +566,8 @@ a.skip:focus{left:16px;top:16px}
    ::after = 上下模块压在房间上的阴影，要盖在图层之上、按钮之下。 */
 .ny-peek{position:relative;margin:16px -26px 0;height:300px;overflow:hidden;background:#FFECD8}
 .nyp-layer{position:absolute;left:0;top:0;width:100%;height:812px;will-change:transform;
-  display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at 50% 48%,#FFFDFB 0%,#FFF3E8 40%,#FFECD8 72%)}
-.nyp-layer img{display:block;width:100%;max-width:440px;height:auto;
-  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 14%,#000 86%,transparent 100%);mask-image:linear-gradient(180deg,transparent 0,#000 14%,#000 86%,transparent 100%)}
+  display:flex;align-items:center;justify-content:center;background:#FFECD8}
+.nyp-layer img{display:block;width:100%;max-width:480px;height:auto;margin-top:-64px}
 .ny-peek::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:1;
   box-shadow:inset 0 16px 18px -14px rgba(120,70,50,.28),inset 0 -16px 18px -14px rgba(120,70,50,.28)}
 .nyp-chip{position:absolute;left:26px;top:16px;z-index:2;font-size:11px;font-weight:800;color:#E0708A;letter-spacing:.3px;
@@ -585,9 +584,8 @@ a.skip:focus{left:16px;top:16px}
   animation:nypNudge 2.8s ease-in-out infinite}
 .nyp-btn:active{transform:scale(.96)}
 @keyframes nypNudge{0%,80%,100%{transform:translateX(0)}86%{transform:translateX(3px)}92%{transform:translateX(0)}}
-/* 夜间：房间整体压暗，中间留一团暖灯 */
-.ny-peek.is-night .nyp-layer::after{content:"";position:absolute;inset:0;
-  background:radial-gradient(ellipse at 50% 46%,rgba(255,200,120,.18) 0%,rgba(46,32,70,.32) 45%,rgba(30,22,52,.62) 100%)}
+/* 夜间：JS 换成开灯版图，底色跟着换成图边的 #5A5890 */
+.ny-peek.is-night,.ny-peek.is-night .nyp-layer{background:#5A5890}
 .ny-peek.is-night .nyp-bar{background:rgba(58,47,79,.78)}
 .ny-peek.is-night .nyp-txt b{color:#FFF3F5}
 .ny-peek.is-night .nyp-txt span{color:#D9C5D0}