diff --git a/app/src/main/assets/h5/css/app.css b/app/src/main/assets/h5/css/app.css
index 48fddb7..bc604bc 100644
--- a/app/src/main/assets/h5/css/app.css
+++ b/app/src/main/assets/h5/css/app.css
@@ -120,25 +120,22 @@ body {
   to { opacity: 1; transform: none; }
 }
 
-/* 首页三栏布局：三等分纵向列，卡片向下堆叠 */
-/* Home three-column layout: three equal vertical columns, cards stack downward */
+/* 首页卡片 Grid：三等分列，卡片可跨栏（span-2/3），行均分高度 */
+/* Home card grid: three equal columns, cards can span (span-2/3), rows split evenly */
 .tri-col {
   flex: 1;
   min-height: 0;
-  display: flex;
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  grid-auto-rows: 1fr;
   gap: 16px;
   padding: 16px;
-}
-
-.col {
-  flex: 1;
-  min-width: 0;
-  display: flex;
-  flex-direction: column;
-  gap: 16px;
   overflow-y: auto;
 }
 
+.card.span-2 { grid-column: span 2; }
+.card.span-3 { grid-column: span 3; }
+
 /* 卡片：柔光玻璃拟态（复用 Task 4 token，非纯色背景） */
 /* Card: soft-glass morphism (reuse Task 4 tokens, not a solid color) */
 .card {
@@ -161,7 +158,9 @@ body {
 /* 时钟卡缩放权重小：占栏高比例小于其他卡片 */
 /* Time card grows less: takes a smaller share of column height than other cards */
 .time-card {
-  flex-grow: 0.5;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
 }
 
 .time-card .big {
@@ -185,6 +184,13 @@ body {
   color: var(--text-dim);
 }
 
+/* 媒体卡：flex column，标题靠上、进度/控制靠下 */
+/* Media card: flex column, title top, progress/controls bottom */
+.media-card {
+  display: flex;
+  flex-direction: column;
+}
+
 /* 媒体卡：正在播放标签 + 标题/艺术家 + 进度条 */
 /* Media card: playing caption + title/artist + progress bar */
 .media-card .cap {
@@ -212,7 +218,8 @@ body {
 }
 
 .media-card .prog {
-  margin-top: 12px;
+  margin-top: auto;
+  padding-top: 12px;
   height: 4px;
   border-radius: 999px;
   background: var(--glass-border);
@@ -225,6 +232,32 @@ body {
   background: var(--accent);
 }
 
+/* 媒体控制按钮：上一首/暂停/下一首 */
+/* Media controls: previous / play-pause / next */
+.media-card .controls {
+  margin-top: 12px;
+  display: flex;
+  gap: 10px;
+}
+
+.media-card .controls button {
+  width: 36px;
+  height: 36px;
+  border: none;
+  border-radius: 999px;
+  background: var(--glass-border);
+  color: var(--text);
+  font-size: 15px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.media-card .controls button:active {
+  opacity: 0.6;
+}
+
 /* 安卓 APP 列表页：搜索框 + 网格 */
 /* Android app list page: search box + grid */
 .search { padding: 16px; }
diff --git a/app/src/main/assets/h5/index.html b/app/src/main/assets/h5/index.html
index e70c516..12a0c12 100644
--- a/app/src/main/assets/h5/index.html
+++ b/app/src/main/assets/h5/index.html
@@ -25,6 +25,7 @@
   </main>
 </div>
 <script src="js/bridge.js"></script>
+<script src="js/preload.js"></script>
 <script src="js/mask.js"></script>
 <script src="js/cards/cards.js"></script>
 <script src="js/router.js"></script>
@@ -55,6 +56,19 @@
   // 初始化背景遮罩（夜间主题 + 已启用时生效）
   // Apply wallpaper dim on startup (active under dark theme when enabled)
   window.mask.apply();
+  // 加载壁纸为 body 背景：玻璃效果 backdrop-filter 需要 WebView 内部有背景可模糊
+  // Load the wallpaper as the body background: the glass backdrop-filter needs
+  // in-WebView content behind cards to blur
+  bridge.call('getWallpaper').then(wp => {
+    if (wp) {
+      document.body.style.backgroundImage = 'url(' + wp + ')';
+      document.body.style.backgroundSize = 'cover';
+      document.body.style.backgroundPosition = 'center';
+    }
+  }).catch(() => {});
+  // 首屏渲染后延迟预加载其他页面数据，减少切页等待
+  // Preload other pages' data after first paint to reduce switch latency
+  setTimeout(() => window.preload.loadAll(), 800);
 </script>
 </body>
 </html>
diff --git a/app/src/main/assets/h5/js/pages/applist.js b/app/src/main/assets/h5/js/pages/applist.js
index f44e966..2ae3b06 100644
--- a/app/src/main/assets/h5/js/pages/applist.js
+++ b/app/src/main/assets/h5/js/pages/applist.js
@@ -6,7 +6,9 @@ window.loadAppList = async function () {
   page.innerHTML = `
     <div class="search"><input id="app-search" placeholder="搜索应用…"></div>
     <div class="grid" id="app-grid"></div>`;
-  const apps = JSON.parse(await bridge.call('listApps'));
+  // 优先用预加载缓存，未就绪则实时加载
+  // Prefer the preloaded cache; fetch live when not ready yet
+  const apps = window.preload.apps || JSON.parse(await bridge.call('listApps'));
   const grid = document.getElementById('app-grid');
   const render = (list) => {
     grid.textContent = '';
diff --git a/app/src/main/assets/h5/js/pages/home.js b/app/src/main/assets/h5/js/pages/home.js
index 4a47b52..99d07a5 100644
--- a/app/src/main/assets/h5/js/pages/home.js
+++ b/app/src/main/assets/h5/js/pages/home.js
@@ -3,12 +3,12 @@
 // (big time card + generic placeholders for the rest)
 window.updateHomeCards = async function () {
   const page = document.querySelector('[data-page="home"]');
-  page.innerHTML = `<div class="tri-col" id="tri-col">
-    <div class="col" id="col-0"></div><div class="col" id="col-1"></div><div class="col" id="col-2"></div>
-  </div>`;
+  page.innerHTML = `<div class="tri-col" id="tri-col"></div>`;
   let catalog = [];
   try {
-    catalog = JSON.parse(await bridge.call('fetchCards'));
+    // 优先用预加载缓存，未就绪则实时加载
+    // Prefer the preloaded cache; fetch live when not ready yet
+    catalog = window.preload.cards || JSON.parse(await bridge.call('fetchCards'));
   } catch (e) {
     // 桥接不可用（如未接线）时按空目录处理
     // Treat bridge failure as an empty catalog
@@ -20,27 +20,33 @@ window.updateHomeCards = async function () {
   if (!catalog.some((c) => c.id === 'time')) {
     catalog.push({ id: 'time', name: '大字时间', priority: 0 });
   }
-  const cols = cards.layout(catalog);
-  cols.forEach((ids, i) => {
-    const col = document.getElementById(`col-${i}`);
-    ids.forEach((id) => {
-      if (id === 'time') col.appendChild(renderTimeCard());
-      else col.appendChild(renderGenericCard(id));
-    });
-  });
-  // 若有当前媒体，覆盖中间栏为媒体卡（切页回来后恢复媒体卡）
-  // If there is active media, replace the middle column with the media card
-  // (restores the media card when navigating back to home)
-  if (currentMedia) {
-    const mediaCol = document.getElementById('col-1');
-    if (mediaCol) {
-      mediaCol.innerHTML = '';
-      mediaCol.appendChild(renderMediaCard(currentMedia));
-    }
-  }
+  renderCards(catalog);
   startTimeCardTicker();
 };
 
+// 卡片 Grid 渲染：media 卡 span 2（跨栏），time/其他卡 span 1
+// Card grid render: media card spans 2 columns, time/other cards span 1
+function renderCards(catalog) {
+  const grid = document.getElementById('tri-col');
+  grid.textContent = '';
+  const items = [];
+  // 按 priority 排序（数字小者优先）
+  // Sort by priority (smaller first)
+  const sorted = [...catalog].sort((a, b) => (a.priority || 0) - (b.priority || 0));
+  // time 卡（内置，span 1）
+  if (sorted.some(c => c.id === 'time')) items.push({ span: 1, el: renderTimeCard() });
+  // media 卡（有媒体时 span 2，跨栏更美观）
+  if (currentMedia) items.push({ span: 2, el: renderMediaCard(currentMedia) });
+  // 其他卡（排除 time）span 1
+  sorted.filter(c => c.id !== 'time').forEach(c => {
+    items.push({ span: 1, el: renderGenericCard(c.id) });
+  });
+  items.forEach(item => {
+    item.el.classList.add('span-' + item.span);
+    grid.appendChild(item.el);
+  });
+}
+
 // 内置大字时间卡：当前时间（时:分 + 小号秒）+ 日期
 // Builtin big time card: current time (HH:MM + small seconds) + date
 function renderTimeCard() {
@@ -100,16 +106,11 @@ let currentMedia = null;
 window.HearthEvents = window.HearthEvents || {};
 window.HearthEvents.mediaSessionChanged = function (info) {
   currentMedia = info;
-  const mediaCol = document.getElementById('col-1');
-  if (!mediaCol) return;
-  if (info) {
-    mediaCol.innerHTML = '';
-    mediaCol.appendChild(renderMediaCard(info));
-  } else {
-    // 无媒体：降级到日历/天气（由 cards.layout 重新计算）
-    // No media: fall back to calendar/weather (recomputed by cards.layout)
-    window.updateHomeCards();
-  }
+  const grid = document.getElementById('tri-col');
+  if (!grid) return;
+  // 重新渲染：有媒体时 media 卡 span 2，无媒体时其他卡填满
+  // Re-render: media card spans 2 when present, others fill otherwise
+  window.updateHomeCards();
 };
 
 // 媒体卡：正在播放标签 + 标题/艺术家 + 进度条
diff --git a/app/src/main/assets/h5/js/pages/webapplist.js b/app/src/main/assets/h5/js/pages/webapplist.js
index a66fac2..0d413ed 100644
--- a/app/src/main/assets/h5/js/pages/webapplist.js
+++ b/app/src/main/assets/h5/js/pages/webapplist.js
@@ -6,7 +6,9 @@ window.loadWebAppList = async function () {
   page.innerHTML = `
     <div class="search"><input id="web-search" placeholder="搜索 webAPP…"></div>
     <div class="grid" id="web-grid"></div>`;
-  const apps = JSON.parse(await bridge.call('fetchWebApps'));
+  // 优先用预加载缓存，未就绪则实时加载
+  // Prefer the preloaded cache; fetch live when not ready yet
+  const apps = window.preload.webApps || JSON.parse(await bridge.call('fetchWebApps'));
   const grid = document.getElementById('web-grid');
   const render = (list) => {
     grid.textContent = '';
diff --git a/app/src/main/assets/h5/js/preload.js b/app/src/main/assets/h5/js/preload.js
new file mode 100644
index 0000000..2b80030
--- /dev/null
+++ b/app/src/main/assets/h5/js/preload.js
@@ -0,0 +1,24 @@
+// 页面数据预加载：启动后后台拉取各页面数据缓存，切页时直接渲染减少延迟
+// Page data preload: fetch and cache page data in the background after startup,
+// so page switches render immediately without a fetch delay
+window.preload = {
+  apps: null,
+  webApps: null,
+  cards: null,
+
+  async loadAll() {
+    try {
+      const [apps, webApps, cards] = await Promise.all([
+        bridge.call('listApps').catch(() => null),
+        bridge.call('fetchWebApps').catch(() => null),
+        bridge.call('fetchCards').catch(() => null),
+      ]);
+      this.apps = apps ? JSON.parse(apps) : null;
+      this.webApps = webApps ? JSON.parse(webApps) : null;
+      this.cards = cards ? JSON.parse(cards) : null;
+    } catch (e) {
+      // 预加载失败不阻塞：切页时仍会实时加载
+      // Preload failure is non-blocking: page switches still fetch live
+    }
+  },
+};
diff --git a/app/src/main/java/top/yeij/hearth/MainActivity.kt b/app/src/main/java/top/yeij/hearth/MainActivity.kt
index 33b55a5..6527446 100644
--- a/app/src/main/java/top/yeij/hearth/MainActivity.kt
+++ b/app/src/main/java/top/yeij/hearth/MainActivity.kt
@@ -1,12 +1,16 @@
 package top.yeij.hearth
 
 import android.app.Activity
+import android.app.WallpaperManager
 import android.content.Intent
 import android.content.res.Configuration
+import android.graphics.Bitmap
+import android.graphics.Canvas
 import android.net.Uri
 import android.os.Bundle
 import android.provider.Settings
 import android.text.TextUtils
+import android.util.Base64
 import android.util.Log
 import android.view.View
 import android.view.ViewGroup
@@ -30,8 +34,10 @@ import top.yeij.hearth.webview.BrightnessProvider
 import top.yeij.hearth.webview.JsBridge
 import top.yeij.hearth.webview.NotificationAccessProvider
 import top.yeij.hearth.webview.ServerUrlProvider
+import top.yeij.hearth.webview.WallpaperProvider
 import top.yeij.hearth.webview.WebAppHost
 import top.yeij.hearth.webview.WebViewManager
+import java.io.ByteArrayOutputStream
 import java.io.File
 
 // HOME 桌面 activity，接线各能力层：Repository、媒体监听、多 WebView webAPP 管理
@@ -106,6 +112,35 @@ class MainActivity : Activity() {
         }
     }
 
+    // 壁纸提供实现：WallpaperManager 取当前壁纸转 base64，供 H5 body 背景使用
+    // Wallpaper implementation: WallpaperManager -> base64 for the H5 body background
+    private val wallpaperProvider = object : WallpaperProvider {
+        override fun getWallpaperBase64(): String {
+            return try {
+                val wm = WallpaperManager.getInstance(this@MainActivity)
+                // 动态壁纸（Live Wallpaper）是实时渲染、无静态 Drawable，返回空让 H5 保持
+                // 透明透出动态壁纸；此时玻璃模糊降级为普通半透明（backdrop-filter 无内容可模糊）
+                // Live wallpapers render in real time with no static drawable; return empty
+                // so H5 stays transparent and shows the live wallpaper, with the glass blur
+                // degrading to plain translucency (backdrop-filter has nothing to blur)
+                if (wm.wallpaperInfo != null) return ""
+                val d = wm.drawable ?: return ""
+                val dm = resources.displayMetrics
+                val bmp = Bitmap.createBitmap(dm.widthPixels, dm.heightPixels, Bitmap.Config.ARGB_8888)
+                val canvas = Canvas(bmp)
+                d.setBounds(0, 0, dm.widthPixels, dm.heightPixels)
+                d.draw(canvas)
+                val out = ByteArrayOutputStream()
+                bmp.compress(Bitmap.CompressFormat.JPEG, 80, out)
+                bmp.recycle()
+                "data:image/jpeg;base64," + Base64.encodeToString(out.toByteArray(), Base64.NO_WRAP)
+            } catch (e: Exception) {
+                Log.w(TAG, "getWallpaper: ${e.message}")
+                ""
+            }
+        }
+    }
+
     private lateinit var webAppRepository: WebAppRepository
     private lateinit var mediaSource: MediaSessionSource
     private lateinit var root: FrameLayout
@@ -155,6 +190,7 @@ class MainActivity : Activity() {
             notificationAccess = notificationAccess,
             brightness = brightnessProvider,
             serverUrl = serverUrlProvider,
+            wallpaper = wallpaperProvider,
         )
         root = FrameLayout(this)
         setContentView(root)
diff --git a/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt b/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt
index 4bfbd6f..e5158e3 100644
--- a/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt
+++ b/app/src/main/java/top/yeij/hearth/webview/JsBridge.kt
@@ -36,6 +36,14 @@ interface ServerUrlProvider {
     fun setServerUrl(url: String)
 }
 
+// 壁纸提供接口：由 MainActivity 实现（WallpaperManager 转 base64），
+// 让壁纸进入 WebView 内部，backdrop-filter 玻璃才能模糊到壁纸
+// Wallpaper provider implemented by MainActivity (WallpaperManager -> base64), so the
+// wallpaper lives inside the WebView and the glass backdrop-filter can blur it
+interface WallpaperProvider {
+    fun getWallpaperBase64(): String
+}
+
 class JsBridge(
     private val deviceWidthPx: Int,
     private val deviceHeightPx: Int,
@@ -58,6 +66,9 @@ class JsBridge(
     // 服务器地址存储接口
     // Server URL storage provider
     private val serverUrl: ServerUrlProvider? = null,
+    // 壁纸提供接口（base64）
+    // Wallpaper provider (base64)
+    private val wallpaper: WallpaperProvider? = null,
 ) {
     private val gson = com.google.gson.Gson()
 
@@ -270,6 +281,11 @@ class JsBridge(
         serverUrl?.setServerUrl(url)
     }
 
+    // 返回壁纸 base64（data URI，未接入返回空字符串）
+    // Return the wallpaper base64 (data URI; empty string when not wired)
+    @android.webkit.JavascriptInterface
+    fun getWallpaper(): String = wallpaper?.getWallpaperBase64() ?: ""
+
     // 重新拉取 webAPP 清单 + 卡片目录，返回 { count }
     // Re-fetch the webAPP manifest + card catalog, return { count }
     @android.webkit.JavascriptInterface