diff --git a/web/display/src/AppearancePanel.tsx b/web/display/src/AppearancePanel.tsx
index d944bb1..dbdc8a0 100644
--- a/web/display/src/AppearancePanel.tsx
+++ b/web/display/src/AppearancePanel.tsx
@@ -1,5 +1,6 @@
 import { useEffect, useRef, useState } from 'react'
 import { APPEARANCE_DEFAULTS, APPEARANCE_RANGES, resetAppearance, setAppearance, useAppearance, type AppearanceSettings } from './appearance'
+import { PHOTO_GROUPS, PHOTOS } from './backgrounds'
 
 type Tab = 'weather' | 'background'
 
@@ -8,6 +9,8 @@ type SliderName = keyof typeof APPEARANCE_RANGES
 interface Slider {
   name: SliderName
   label: string
+  /** 悬停提示。 */
+  hint?: string
   /** 数值怎么显示：默认是百分比。 */
   format?: (value: number) => string
 }
@@ -29,17 +32,18 @@ const WEATHER_SWITCHES: { name: 'mouse' | 'bullet'; label: string; hint: string
 ]
 
 const BACKGROUND_SLIDERS: Slider[] = [
-  { name: 'bgBlur', label: '模糊', format: (value) => `${value}px` },
+  { name: 'bgBlur', label: '再模糊', format: (value) => `${value}px` },
   { name: 'parallax', label: '晃动' },
+  { name: 'bgVeil', label: '遮罩', hint: '盖在背景图上的那层灰色（暗色）/ 白色（亮色），0% 就是不盖' },
 ]
 
 const WEATHER_KEYS: (keyof AppearanceSettings)[] = ['enabled', 'density', 'speed', 'wind', 'size', 'blur', 'opacity', 'bullet', 'mouse']
-const BACKGROUND_KEYS: (keyof AppearanceSettings)[] = ['bgBlur', 'parallax']
+const BACKGROUND_KEYS: (keyof AppearanceSettings)[] = ['photo', 'bgBlurred', 'bgBlur', 'bgOriginal', 'sway', 'parallax', 'bgVeil']
 
 function SliderRow({ slider, settings, disabled }: { slider: Slider; settings: AppearanceSettings; disabled?: boolean }) {
-  const { name, label, format = percent } = slider
+  const { name, label, hint, format = percent } = slider
   return (
-    <label className="appearance-row">
+    <label className="appearance-row" title={hint}>
       <span>{label}</span>
       <input type="range" {...APPEARANCE_RANGES[name]} value={settings[name]} disabled={disabled} onChange={(event) => setAppearance({ [name]: Number(event.target.value) })} />
       <output>{format(settings[name])}</output>
@@ -111,9 +115,31 @@ export function AppearancePanel() {
           </div>
         ) : (
           <div className="appearance-body" key="background">
-            {BACKGROUND_SLIDERS.map((slider) => (
-              <SliderRow key={slider.name} slider={slider} settings={settings} />
+            {PHOTO_GROUPS.map((group) => (
+              <div key={group} role="group" aria-label={group}>
+                <div className="appearance-group-title">{group}</div>
+                <div className="appearance-choices">
+                  {PHOTOS.filter((photo) => photo.group === group).map(({ id, label, light }) => (
+                    <button key={id} type="button" className="appearance-choice" aria-pressed={settings.photo === id} onClick={() => setAppearance({ photo: id })}>
+                      <img src={light.blur} alt="" loading="lazy" />
+                      {label}
+                    </button>
+                  ))}
+                </div>
+              </div>
             ))}
+            <SwitchRow label="背景模糊" hint="关掉就换成不模糊的图" checked={settings.bgBlurred} onChange={(bgBlurred) => setAppearance({ bgBlurred })} />
+            <SliderRow slider={BACKGROUND_SLIDERS[0]} settings={settings} disabled={!settings.bgBlurred} />
+            <SwitchRow
+              label="不压缩"
+              hint="背景模糊关着时：开是加载没压缩的原图（每张约 2MB），关是压缩过的（不到 300KB）"
+              checked={settings.bgOriginal}
+              disabled={settings.bgBlurred}
+              onChange={(bgOriginal) => setAppearance({ bgOriginal })}
+            />
+            <SwitchRow label="背景晃动" hint="关掉就不跟着鼠标晃" checked={settings.sway} onChange={(sway) => setAppearance({ sway })} />
+            <SliderRow slider={BACKGROUND_SLIDERS[1]} settings={settings} disabled={!settings.sway} />
+            <SliderRow slider={BACKGROUND_SLIDERS[2]} settings={settings} />
           </div>
         )}
         <button type="button" className="appearance-reset" disabled={!changed} tabIndex={open ? 0 : -1} onClick={() => resetAppearance(keys)}>
diff --git a/web/display/src/appearance.ts b/web/display/src/appearance.ts
index a557c32..8f5ec45 100644
--- a/web/display/src/appearance.ts
+++ b/web/display/src/appearance.ts
@@ -1,4 +1,5 @@
 import { useEffect, useSyncExternalStore } from 'react'
+import { backgroundUrl, DEFAULT_PHOTO, PHOTOS } from './backgrounds'
 
 /**
  * 展示页右下角「外观」里能调的参数：都是相对默认值的倍数（1 = 原样），存在浏览器里。
@@ -23,10 +24,20 @@ export interface AppearanceSettings {
   bullet: boolean
   /** 鼠标拨动雪。 */
   mouse: boolean
-  /** 背景在预先模糊的基础上再模糊多少（像素，0 是不再模糊）。 */
+  /** 用哪张照片（id，见 backgrounds.ts）。 */
+  photo: string
+  /** 背景模糊：开是随主题的两张预先模糊过的图，关是不模糊的图（两张，也是随主题）。 */
+  bgBlurred: boolean
+  /** 背景模糊关着的时候：开是加载没压缩的原图（PNG，近 2MB 一张），关是压缩过的（JPG，不到 300KB）。 */
+  bgOriginal: boolean
+  /** 背景模糊开着的时候，在预先模糊的基础上再模糊多少（像素，0 是不再模糊）。 */
   bgBlur: number
-  /** 背景跟着鼠标晃动的幅度（0 是不动，1 是默认）。 */
+  /** 背景跟着鼠标晃动：总开关，关了背景就完全不动。 */
+  sway: boolean
+  /** 背景跟着鼠标晃动的幅度（1 是默认）。 */
   parallax: number
+  /** 盖在背景图上的那层遮罩（亮色是白、暗色是灰）的浓度：0 是不盖，1 是默认（亮色 50%、暗色 62%）。 */
+  bgVeil: number
 }
 
 export const APPEARANCE_DEFAULTS: AppearanceSettings = {
@@ -39,8 +50,13 @@ export const APPEARANCE_DEFAULTS: AppearanceSettings = {
   opacity: 1,
   bullet: true,
   mouse: true,
+  photo: DEFAULT_PHOTO,
+  bgBlurred: true,
+  bgOriginal: false,
   bgBlur: 0,
+  sway: true,
   parallax: 1,
+  bgVeil: 1,
 }
 
 /** 每个滑块的范围（和 AppearanceSettings 里同名的数值项对应）。 */
@@ -53,6 +69,7 @@ export const APPEARANCE_RANGES = {
   opacity: { min: 0.2, max: 2.5, step: 0.05 },
   bgBlur: { min: 0, max: 30, step: 1 },
   parallax: { min: 0, max: 1.5, step: 0.05 },
+  bgVeil: { min: 0, max: 1.6, step: 0.05 },
 } as const
 
 const KEY = 'moshiro.appearance'
@@ -64,7 +81,10 @@ function load(): AppearanceSettings {
     const merged: Record<string, unknown> = { ...APPEARANCE_DEFAULTS }
     for (const name of Object.keys(APPEARANCE_DEFAULTS) as (keyof AppearanceSettings)[]) {
       const value = saved[name]
-      if (typeof value === typeof APPEARANCE_DEFAULTS[name]) merged[name] = value
+      if (typeof value !== typeof APPEARANCE_DEFAULTS[name]) continue
+      // 照片只认列表里有的，图删了、改名了就回到默认
+      if (name === 'photo' && !PHOTOS.some((photo) => photo.id === value)) continue
+      merged[name] = value
     }
     return merged as unknown as AppearanceSettings
   } catch {
@@ -96,14 +116,28 @@ export function subscribeAppearance(listener: () => void): () => void {
 
 export const useAppearance = () => useSyncExternalStore(subscribeAppearance, getAppearance)
 
-/** 把背景的额外模糊写进 <html> 的 --bg-filter（display.css 里 .bg-layer 用它；不模糊的时候是 none，不给浏览器多一层滤镜）。 */
+/**
+ * 把当前该用的背景图写进 <html> 的 --bg-image（照片、主题、背景模糊、不压缩一起决定用哪个版本；display.css 里 .bg-layer 用它），
+ * 把遮罩的浓度写进 --bg-veil-scale，把背景的额外模糊写进 --bg-filter（不模糊的时候是 none，不给浏览器多一层滤镜），
+ * 把晃动的开关写进 data-sway（关了就按窗口的原始比例铺满，display.css 里 data-sway='off'）。切换主题时也重新算。
+ */
 export function useAppearanceVars() {
   useEffect(() => {
+    const root = document.documentElement
     const apply = () => {
-      const blur = getAppearance().bgBlur
-      document.documentElement.style.setProperty('--bg-filter', blur > 0 ? `blur(${blur}px)` : 'none')
+      const { bgBlur, bgBlurred, bgOriginal, photo, bgVeil, sway } = getAppearance()
+      root.style.setProperty('--bg-veil-scale', String(bgVeil))
+      root.style.setProperty('--bg-filter', bgBlurred && bgBlur > 0 ? `blur(${bgBlur}px)` : 'none')
+      root.style.setProperty('--bg-image', `url("${backgroundUrl(photo, root.dataset.theme === 'dark', bgBlurred, bgOriginal)}")`)
+      root.dataset.sway = sway ? 'on' : 'off'
     }
     apply()
-    return subscribeAppearance(apply)
+    const observer = new MutationObserver(apply)
+    observer.observe(root, { attributes: true, attributeFilter: ['data-theme'] })
+    const unsubscribe = subscribeAppearance(apply)
+    return () => {
+      observer.disconnect()
+      unsubscribe()
+    }
   }, [])
 }
diff --git a/web/display/src/assets/bg-bana-sharp.jpg b/web/display/src/assets/bg-bana-sharp.jpg
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index 0000000..2bccac3
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diff --git a/web/display/src/assets/photo86-8-original.jpg b/web/display/src/assets/photo86-8-original.jpg
new file mode 100644
index 0000000..90fe77b
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diff --git a/web/display/src/assets/photo86-8.jpg b/web/display/src/assets/photo86-8.jpg
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diff --git a/web/display/src/backgroundTint.ts b/web/display/src/backgroundTint.ts
index af034b7..6e0ae98 100644
--- a/web/display/src/backgroundTint.ts
+++ b/web/display/src/backgroundTint.ts
@@ -1,6 +1,6 @@
 import { useEffect } from 'react'
-import bgLight from './assets/bg.jpg'
-import bgDark from './assets/bg-dark.jpg'
+import { getAppearance, subscribeAppearance } from './appearance'
+import { backgroundUrl } from './backgrounds'
 
 /** 取样的缩略图大小：背景本来就是预先模糊过的，缩得很小就够算平均色。 */
 const SAMPLE_WIDTH = 32
@@ -46,8 +46,8 @@ function toHsl(r: number, g: number, b: number): [number, number, number] {
 }
 
 /**
- * 暗色下玻璃的颜色，和盖在背景图上的底色，都从当前背景图自己的平均色算出来：
- * 色相照搬图里的，饱和度打个折（免得发艳、发蓝），亮度压到很暗。写进 <html> 的 --bg-tint（玻璃）和 --bg-veil-tint（底色），
+ * 暗色下玻璃的颜色，和盖在背景图上的底色，都从当前背景图（选了哪组照片、哪个主题）自己的平均色算出来：
+ * 色相照搬图里的，饱和度保留大半，亮度跟着图本身的亮度走但压得很暗。写进 <html> 的 --bg-tint（玻璃）和 --bg-veil-tint（底色），
  * tokens.css 里暗色的 --glass-tint / --glass-veil 用它们；切换主题时重新取。亮色不用这个。
  */
 export function useBackgroundTint() {
@@ -58,12 +58,18 @@ export function useBackgroundTint() {
       const image = images.get(url)
       const average = image && averageColor(image)
       if (!average) return
-      const [h, s] = toHsl(...average)
-      root.style.setProperty('--bg-tint', `hsl(${h.toFixed(0)} ${(s * 55).toFixed(0)}% 13%)`)
-      root.style.setProperty('--bg-veil-tint', `hsl(${h.toFixed(0)} ${(s * 45).toFixed(0)}% 8%)`)
+      const [h, s, l] = toHsl(...average)
+      // 玻璃：色相照搬，饱和度保留大半（上限 45%），亮度跟着图本身的亮度走（图越亮，玻璃越亮，10%–22%）；
+      // 底色（盖在背景图上的遮罩）同理，但更暗（6%–14%）。所以换一张照片，暗色玻璃的颜色和深浅都会跟着变
+      const clamp = (value: number, low: number, high: number) => Math.max(low, Math.min(high, value))
+      const glass = clamp(9 + l * 26, 10, 22)
+      const veil = clamp(5 + l * 14, 6, 14)
+      root.style.setProperty('--bg-tint', `hsl(${h.toFixed(0)} ${clamp(s * 90, 0, 45).toFixed(0)}% ${glass.toFixed(1)}%)`)
+      root.style.setProperty('--bg-veil-tint', `hsl(${h.toFixed(0)} ${clamp(s * 75, 0, 38).toFixed(0)}% ${veil.toFixed(1)}%)`)
     }
     const update = () => {
-      const url = root.dataset.theme === 'dark' ? bgDark : bgLight
+      // 取样用预先模糊的那个版本：和不模糊的原图平均色一样，图小、取得快
+      const url = backgroundUrl(getAppearance().photo, root.dataset.theme === 'dark', true, false)
       if (images.has(url)) {
         apply(url)
         return
@@ -76,6 +82,10 @@ export function useBackgroundTint() {
     update()
     const observer = new MutationObserver(update)
     observer.observe(root, { attributes: true, attributeFilter: ['data-theme'] })
-    return () => observer.disconnect()
+    const unsubscribe = subscribeAppearance(update)
+    return () => {
+      observer.disconnect()
+      unsubscribe()
+    }
   }, [])
 }
diff --git a/web/display/src/backgrounds.ts b/web/display/src/backgrounds.ts
new file mode 100644
index 0000000..9770f94
--- /dev/null
+++ b/web/display/src/backgrounds.ts
@@ -0,0 +1,81 @@
+import bgBlurLight from './assets/bg.jpg'
+import bgBlurDark from './assets/bg-dark.jpg'
+import bgSharpLight from './assets/bg-sharp.jpg'
+import bgSharpDark from './assets/bg-sharp-dark.jpg'
+import bgOriginalLight from './assets/bg-sharp.png'
+import bgOriginalDark from './assets/bg-sharp-dark.png'
+import banaBlur from './assets/bg-bana.jpg'
+import banaSharp from './assets/bg-bana-sharp.jpg'
+import banaOriginal from './assets/bg-bana-sharp.png'
+import bana2Blur from './assets/bg-bana2.jpg'
+import bana2Sharp from './assets/bg-bana2-sharp.jpg'
+import bana2Original from './assets/bg-bana2-sharp.png'
+import photo86_3Blur from './assets/photo86-3-blur.jpg'
+import photo86_3 from './assets/photo86-3.jpg'
+import photo86_3Original from './assets/photo86-3-original.png'
+import photo86_7Blur from './assets/photo86-7-blur.jpg'
+import photo86_7 from './assets/photo86-7.jpg'
+import photo86_7Original from './assets/photo86-7-original.jpg'
+import photo86_2Blur from './assets/photo86-2-blur.jpg'
+import photo86_2 from './assets/photo86-2.jpg'
+import photo86_2Original from './assets/photo86-2-original.jpg'
+import photo86_8Blur from './assets/photo86-8-blur.jpg'
+import photo86_8 from './assets/photo86-8.jpg'
+import photo86_8Original from './assets/photo86-8-original.jpg'
+import photo86_5Blur from './assets/photo86-5-blur.jpg'
+import photo86_5 from './assets/photo86-5.jpg'
+import photo86_5Original from './assets/photo86-5-original.jpg'
+import photo86_6Blur from './assets/photo86-6-blur.jpg'
+import photo86_6 from './assets/photo86-6.jpg'
+import photo86_6Original from './assets/photo86-6-original.jpg'
+
+/** 一张照片的三个版本：blur 是预先模糊过的，sharp 是不模糊但压缩过的，original 是没压缩的原图。 */
+export interface Variants {
+  blur: string
+  sharp: string
+  original: string
+}
+
+/** 可选的背景照片：group 是分组（面板里一组一行），亮色和暗色可以是不同的两张，也可以是同一张。 */
+export interface Photo {
+  id: string
+  group: string
+  label: string
+  light: Variants
+  dark: Variants
+}
+
+const same = (variants: Variants) => ({ light: variants, dark: variants })
+
+/** 加一张照片：把它的三个版本放进 assets/，在这里加一项。第一项是默认的。 */
+export const PHOTOS: Photo[] = [
+  {
+    id: 'sleep',
+    group: 'shirobana',
+    label: '睡颜',
+    // 亮色睁眼、暗色闭眼
+    light: { blur: bgBlurLight, sharp: bgSharpLight, original: bgOriginalLight },
+    dark: { blur: bgBlurDark, sharp: bgSharpDark, original: bgOriginalDark },
+  },
+  { id: 'bana', group: 'shirobana', label: '伸手', ...same({ blur: banaBlur, sharp: banaSharp, original: banaOriginal }) },
+  { id: 'bana2', group: 'shirobana', label: '海边', ...same({ blur: bana2Blur, sharp: bana2Sharp, original: bana2Original }) },
+  { id: '86-3', group: '86', label: '小憩', ...same({ blur: photo86_3Blur, sharp: photo86_3, original: photo86_3Original }) },
+  { id: '86-7', group: '86', label: '窗边', ...same({ blur: photo86_7Blur, sharp: photo86_7, original: photo86_7Original }) },
+  { id: '86-2', group: '86', label: '伞下', ...same({ blur: photo86_2Blur, sharp: photo86_2, original: photo86_2Original }) },
+  { id: '86-8', group: '86', label: '驾驶', ...same({ blur: photo86_8Blur, sharp: photo86_8, original: photo86_8Original }) },
+  { id: '86-5', group: '86', label: '怀中', ...same({ blur: photo86_5Blur, sharp: photo86_5, original: photo86_5Original }) },
+  { id: '86-6', group: '86', label: '倚靠', ...same({ blur: photo86_6Blur, sharp: photo86_6, original: photo86_6Original }) },
+]
+
+export const DEFAULT_PHOTO = PHOTOS[0].id
+
+/** 照片所在的分组，按出现的顺序。 */
+export const PHOTO_GROUPS = [...new Set(PHOTOS.map((photo) => photo.group))]
+
+export const findPhoto = (id: string): Photo => PHOTOS.find((photo) => photo.id === id) ?? PHOTOS[0]
+
+/** 当前该用哪张图：哪张照片、哪个主题，再按「背景模糊」「不压缩」选版本。 */
+export function backgroundUrl(id: string, dark: boolean, blurred: boolean, original: boolean): string {
+  const variants = dark ? findPhoto(id).dark : findPhoto(id).light
+  return blurred ? variants.blur : original ? variants.original : variants.sharp
+}
diff --git a/web/display/src/display.css b/web/display/src/display.css
index 6aa954d..563f9cf 100644
--- a/web/display/src/display.css
+++ b/web/display/src/display.css
@@ -1008,7 +1008,7 @@
   z-index: -1;
   background-image:
     linear-gradient(color-mix(in srgb, var(--glass-veil) var(--bg-veil), transparent), color-mix(in srgb, var(--glass-veil) var(--bg-veil), transparent)),
-    url('./assets/bg.jpg');
+    var(--bg-image, url('./assets/bg.jpg'));
   background-size: cover;
   background-position: center;
   pointer-events: none;
@@ -1017,18 +1017,24 @@
 }
 
 :root {
-  --bg-veil: 50%;
+  /* 盖在背景图上的遮罩的浓度：默认亮色 50%、暗色 62%；右下角「外观」里按倍数调（--bg-veil-scale，0 是不盖） */
+  --bg-veil: min(100%, calc(50% * var(--bg-veil-scale, 1)));
 }
 
 :root[data-theme="dark"] {
-  --bg-veil: 62%;
+  --bg-veil: min(100%, calc(62% * var(--bg-veil-scale, 1)));
 }
 
-/* 暗色模式换一张背景图 */
+/* 用哪张图由「外观」里的选择决定（backgrounds.ts，JS 把它写进 --bg-image）；这里的回退只管 JS 还没跑的第一帧：暗色先用暗色那张 */
 :root[data-theme="dark"] .bg-layer {
   background-image:
     linear-gradient(color-mix(in srgb, var(--glass-veil) var(--bg-veil), transparent), color-mix(in srgb, var(--glass-veil) var(--bg-veil), transparent)),
-    url('./assets/bg-dark.jpg');
+    var(--bg-image, url('./assets/bg-dark.jpg'));
+}
+
+/* 关了背景晃动：背景不会再移动，就不用向外多留一圈边距了，按窗口的原始比例铺满（不会被放大裁掉四周） */
+:root[data-sway='off'] .bg-layer {
+  inset: 0;
 }
 
 /* ── 亚克力（毛玻璃）规范：所有玻璃面（卡片、线路面板、顶部栏、时间轴）只用下面这组变量；颜色来自 tokens.css 的 --glass-*，换风格改那里 ──
@@ -1313,8 +1319,8 @@ input {
   white-space: nowrap;
 }
 
-/* 悬浮提示弹在卡片右边，会盖到下一张卡片上：每张卡片都有自己的层叠上下文（毛玻璃），所以悬停（提示打开）的那张要整张抬到兄弟卡片之上 */
-.agent-card:hover,
+/* 悬浮提示弹在卡片右边，会盖到下一张卡片上：每张卡片都有自己的层叠上下文（毛玻璃），所以提示打开的那张要整张抬到兄弟卡片之上。
+   只在提示真的打开时才抬，不要鼠标一碰到卡片就抬：z-index 一变，带 backdrop-filter 的整张卡片要重新分层，那一帧底部会闪黑 */
 .agent-card:has(.pop.open) {
   z-index: 30;
 }
@@ -1393,8 +1399,7 @@ input {
   height: 100%;
   z-index: -1;
   pointer-events: none;
-  /* 滤色：粒子只会把背后的图提亮，边缘羽化的地方自然融进图里 */
-  mix-blend-mode: screen;
+  /* 不要用 mix-blend-mode（滤色等）：画布在带 backdrop-filter 的卡片后面每帧都在变，再叠一层混合，Chrome 给卡片取背景的时候会整块重新分层，卡片底部就闪黑；边缘的羽化用颜色和透明度做，已经是浅色半透明的，效果和滤色差不多 */
 }
 
 @media (max-width: 640px), ((pointer: coarse) and (max-width: 900px)) {
@@ -1657,3 +1662,55 @@ input {
     display: none;
   }
 }
+
+/* 照片的选择：按组分行，每组一个小标题，下面是缩略图，选中的描一圈 */
+.appearance-group-title {
+  margin-bottom: 4px;
+  color: var(--app-ink-faint);
+  font-size: 11px;
+  letter-spacing: 0.04em;
+}
+
+.appearance-choices {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 8px;
+}
+
+.appearance-choice {
+  display: grid;
+  gap: 4px;
+  padding: 0;
+  border: 0;
+  color: var(--app-ink-muted);
+  background: none;
+  cursor: pointer;
+  text-align: center;
+  font-size: 12px;
+}
+
+.appearance-choice img {
+  width: 100%;
+  aspect-ratio: 16 / 9;
+  object-fit: cover;
+  border-radius: var(--r-control);
+  box-shadow: inset 0 0 0 1px var(--glass-ring);
+  transition:
+    box-shadow 0.2s,
+    transform 0.2s;
+}
+
+.appearance-choice:hover img {
+  transform: translateY(-1px);
+}
+
+.appearance-choice[aria-pressed='true'] {
+  color: var(--app-ink);
+  font-weight: 600;
+}
+
+.appearance-choice[aria-pressed='true'] img {
+  box-shadow:
+    0 0 0 2px var(--app-primary),
+    0 0 0 4px color-mix(in srgb, var(--app-primary) 25%, transparent);
+}
diff --git a/web/display/src/parallax.ts b/web/display/src/parallax.ts
index 8c32442..dd31c27 100644
--- a/web/display/src/parallax.ts
+++ b/web/display/src/parallax.ts
@@ -1,5 +1,5 @@
 import { useEffect, type RefObject } from 'react'
-import { getAppearance } from './appearance'
+import { getAppearance, subscribeAppearance } from './appearance'
 
 /** 指针在窗口里的位置带来的偏移上限（像素）：鼠标停在窗口边缘时背景偏这么多。 */
 const POSITION_SHIFT = 30
@@ -53,7 +53,7 @@ export function useBackgroundParallax(layer: RefObject<HTMLElement | null>) {
     const clamp = (value: number) => Math.max(-SWAY_MAX, Math.min(SWAY_MAX, value))
     const move = (event: PointerEvent) => {
       // 位置：指针在窗口里的位置换成 -1 到 1（背景朝同一个方向偏移，想要反方向就把符号取反）
-      const amount = getAppearance().parallax
+      const amount = swayAmount()
       baseX = ((event.clientX / window.innerWidth) * 2 - 1) * POSITION_SHIFT * amount
       baseY = ((event.clientY / window.innerHeight) * 2 - 1) * POSITION_SHIFT * amount
       // 晃动：这一次移动了多远，就再推背景一把
@@ -65,6 +65,11 @@ export function useBackgroundParallax(layer: RefObject<HTMLElement | null>) {
       lastY = event.clientY
       schedule()
     }
+    // 晃动的幅度：总开关关了就是 0
+    const swayAmount = () => {
+      const { sway, parallax } = getAppearance()
+      return sway ? parallax : 0
+    }
     const leave = () => {
       baseX = 0
       baseY = 0
@@ -75,7 +80,16 @@ export function useBackgroundParallax(layer: RefObject<HTMLElement | null>) {
 
     window.addEventListener('pointermove', move, { passive: true })
     document.documentElement.addEventListener('mouseleave', leave)
+    // 设置里把晃动关了：背景慢慢回到中间，不用等下一次鼠标移动
+    const unsubscribe = subscribeAppearance(() => {
+      if (swayAmount() === 0) {
+        swayX = 0
+        swayY = 0
+        leave()
+      }
+    })
     return () => {
+      unsubscribe()
       window.removeEventListener('pointermove', move)
       document.documentElement.removeEventListener('mouseleave', leave)
       cancelAnimationFrame(frame)