diff --git a/src/components/theme/GlassFixedShellBackplate.vue b/src/components/theme/GlassFixedShellBackplate.vue
index 433a3b7f..488fe53b 100644
--- a/src/components/theme/GlassFixedShellBackplate.vue
+++ b/src/components/theme/GlassFixedShellBackplate.vue
@@ -1,4 +1,5 @@
 <script lang="ts" setup>
+import { computed, nextTick, onBeforeUnmount, onMounted, ref, useId, watch } from 'vue'
 import type { GlassFixedShellBackplateLayer } from '@/composables/useGlassFixedShellBackplate'
 
 interface Props {
@@ -12,17 +13,292 @@ interface Props {
   transitionDurationMs: number
 }
 
+/** 共用稳定壁纸背板、但拥有独立外轮廓的导航表面。 */
+type GeometrySurface = 'sidebar' | 'navbar'
+
+/** SVG objectBoundingBox 坐标，分别以背板的实际宽和高归一化。 */
+interface NormalizedClipRect {
+  /** 可见高度占背板高度的比例。 */
+  height: number
+  /** 水平方向圆角半径占背板宽度的比例。 */
+  rx: number
+  /** 垂直方向圆角半径占背板高度的比例。 */
+  ry: number
+  /** 可见宽度占背板宽度的比例。 */
+  width: number
+  /** 相对背板左边缘的位置。 */
+  x: number
+  /** 相对背板上边缘的位置。 */
+  y: number
+}
+
+/** 背板实际CSS像素边界，不使用可能包含滚动条的window.innerWidth。 */
+interface BackplateBounds {
+  /** 真实高度。 */
+  height: number
+  /** 实际左侧视口坐标。 */
+  left: number
+  /** 实际顶部视口坐标。 */
+  top: number
+  /** 排除滚动条后的实际宽度。 */
+  width: number
+}
+
+const GEOMETRY_SURFACES: readonly GeometrySurface[] = ['sidebar', 'navbar']
+const GEOMETRY_ATTRIBUTE_FILTER = [
+  'class',
+  'data-glass-appearance',
+  'data-glass-quality',
+  'data-shell-display-environment',
+  'data-shell-mode',
+  'data-shell-navbar-attachment',
+  'data-theme',
+  'style',
+]
+
 const props = defineProps<Props>()
+const mainBackplateRef = ref<HTMLElement | null>(null)
+const clipRects = ref<NormalizedClipRect[]>([])
+const clipPathId = `glass-fixed-shell-clip-${useId().replace(/[^a-zA-Z0-9_-]/gu, '-')}`
 const transitionStyle = computed(() => ({
   '--glass-fixed-shell-transition-duration': `${Math.max(0, props.transitionDurationMs)}ms`,
 }))
+const mainBackplateStyle = computed(() => ({
+  ...transitionStyle.value,
+  clipPath: clipRects.value.length === GEOMETRY_SURFACES.length ? `url(#${clipPathId})` : undefined,
+}))
+
+const observedElements: Record<GeometrySurface, HTMLElement | null> = {
+  navbar: null,
+  sidebar: null,
+}
+const transitionHandlers: Record<GeometrySurface, EventListener | null> = {
+  navbar: null,
+  sidebar: null,
+}
+
+let isMounted = false
+let observedShell: HTMLElement | null = null
+let resizeObserver: ResizeObserver | null = null
+let stateObserver: MutationObserver | null = null
+let geometrySyncQueued = false
+let usesResizeFallback = false
+let lastGeometryKey = ''
+
+function getLayoutShell() {
+  return mainBackplateRef.value?.closest('.layout-wrapper') as HTMLElement | null
+}
+
+/** 仅为桌面连接式导航启用几何裁剪，其他壳层继续使用主题原有 CSS 裁剪。 */
+function isConnectedDesktopShell(shell: HTMLElement) {
+  return (
+    document.documentElement.dataset.theme === 'glass' &&
+    !props.isOverlayNav &&
+    shell.dataset.shellMode === 'desktop' &&
+    shell.dataset.shellNavbarAttachment === 'connected' &&
+    !shell.classList.contains('layout-horizontal-nav-active') &&
+    !shell.classList.contains('layout-overlay-nav') &&
+    !shell.classList.contains('layout-app-shell') &&
+    !shell.classList.contains('layout-window-controls-overlay-shell')
+  )
+}
+
+function readBackplateBounds(): BackplateBounds | null {
+  const backplate = mainBackplateRef.value
+  if (!backplate) return null
+
+  const bounds = backplate.getBoundingClientRect()
+  const width = Number.isFinite(bounds.width) ? Math.max(0, bounds.width) : 0
+  const height = Number.isFinite(bounds.height) ? Math.max(0, bounds.height) : 0
+  if (width <= 0 || height <= 0) return null
+
+  return {
+    height,
+    left: Number.isFinite(bounds.left) ? bounds.left : 0,
+    top: Number.isFinite(bounds.top) ? bounds.top : 0,
+    width,
+  }
+}
+
+function clamp(value: number, minimum: number, maximum: number) {
+  return Math.min(Math.max(value, minimum), maximum)
+}
+
+/** 固定导航四角共用等半径；读取计算后的像素值与CSS轮廓保持一致。 */
+function readComputedRadius(element: HTMLElement) {
+  const radius = Number.parseFloat(window.getComputedStyle(element).borderTopLeftRadius)
+  return Number.isFinite(radius) ? Math.max(0, radius) : 0
+}
+
+function readNormalizedClipRect(element: HTMLElement, backplate: BackplateBounds) {
+  const bounds = element.getBoundingClientRect()
+  const left = Number.isFinite(bounds.left) ? bounds.left : 0
+  const top = Number.isFinite(bounds.top) ? bounds.top : 0
+  const width = Number.isFinite(bounds.width) ? Math.max(0, bounds.width) : 0
+  const height = Number.isFinite(bounds.height) ? Math.max(0, bounds.height) : 0
+  const right = Number.isFinite(bounds.right) ? bounds.right : left + width
+  const bottom = Number.isFinite(bounds.bottom) ? bounds.bottom : top + height
+  const visibleLeft = clamp(Math.min(left, right) - backplate.left, 0, backplate.width)
+  const visibleTop = clamp(Math.min(top, bottom) - backplate.top, 0, backplate.height)
+  const visibleRight = clamp(Math.max(left, right) - backplate.left, 0, backplate.width)
+  const visibleBottom = clamp(Math.max(top, bottom) - backplate.top, 0, backplate.height)
+  const visibleWidth = visibleRight - visibleLeft
+  const visibleHeight = visibleBottom - visibleTop
+
+  if (visibleWidth <= 0 || visibleHeight <= 0) return null
+
+  const radius = readComputedRadius(element)
+  const normalizedWidth = visibleWidth / backplate.width
+  const normalizedHeight = visibleHeight / backplate.height
+
+  return {
+    height: normalizedHeight,
+    rx: clamp(radius / backplate.width, 0, normalizedWidth / 2),
+    ry: clamp(radius / backplate.height, 0, normalizedHeight / 2),
+    width: normalizedWidth,
+    x: visibleLeft / backplate.width,
+    y: visibleTop / backplate.height,
+  } satisfies NormalizedClipRect
+}
+
+function bindGeometrySurface(surface: GeometrySurface, element: HTMLElement | null) {
+  const previousElement = observedElements[surface]
+  if (previousElement === element) return
+
+  if (resizeObserver && previousElement) resizeObserver.unobserve(previousElement)
+  const previousHandler = transitionHandlers[surface]
+  if (previousElement && previousHandler) {
+    previousElement.removeEventListener('transitionrun', previousHandler)
+    previousElement.removeEventListener('transitionend', previousHandler)
+    previousElement.removeEventListener('transitioncancel', previousHandler)
+  }
+
+  observedElements[surface] = element
+  transitionHandlers[surface] = null
+  if (!element) return
+
+  resizeObserver?.observe(element)
+  const transitionHandler: EventListener = () => scheduleGeometrySync()
+  transitionHandlers[surface] = transitionHandler
+  element.addEventListener('transitionrun', transitionHandler)
+  element.addEventListener('transitionend', transitionHandler)
+  element.addEventListener('transitioncancel', transitionHandler)
+}
+
+function observeStateSources() {
+  if (!stateObserver) return
+
+  stateObserver.disconnect()
+  stateObserver.observe(document.documentElement, {
+    attributeFilter: GEOMETRY_ATTRIBUTE_FILTER,
+    attributes: true,
+  })
+  if (document.body) {
+    stateObserver.observe(document.body, {
+      attributeFilter: GEOMETRY_ATTRIBUTE_FILTER,
+      attributes: true,
+    })
+  }
+  if (observedShell) {
+    stateObserver.observe(observedShell, {
+      attributeFilter: GEOMETRY_ATTRIBUTE_FILTER,
+      attributes: true,
+    })
+  }
+}
+
+function refreshObservedElements() {
+  const shell = getLayoutShell()
+  if (shell !== observedShell) {
+    observedShell = shell
+    observeStateSources()
+  }
+
+  bindGeometrySurface('sidebar', shell?.querySelector<HTMLElement>('.layout-vertical-nav:not(.overlay-nav)') ?? null)
+  bindGeometrySurface('navbar', shell?.querySelector<HTMLElement>('.layout-navbar') ?? null)
+}
+
+function applyGeometry(nextRects: NormalizedClipRect[]) {
+  const nextKey = JSON.stringify(nextRects)
+  if (nextKey === lastGeometryKey) return
+
+  lastGeometryKey = nextKey
+  clipRects.value = nextRects
+}
+
+function syncGeometry() {
+  if (!isMounted) return
+
+  refreshObservedElements()
+  const shell = observedShell
+  const backplate = readBackplateBounds()
+  const sidebar = observedElements.sidebar
+  const navbar = observedElements.navbar
+
+  if (!shell || !backplate || !isConnectedDesktopShell(shell) || !sidebar || !navbar) {
+    applyGeometry([])
+    return
+  }
+
+  const nextRects = GEOMETRY_SURFACES.map(surface =>
+    readNormalizedClipRect(observedElements[surface] as HTMLElement, backplate),
+  )
+  if (nextRects.some(rect => rect === null)) {
+    applyGeometry([])
+    return
+  }
+
+  applyGeometry(nextRects as NormalizedClipRect[])
+}
+
+function scheduleGeometrySync() {
+  if (geometrySyncQueued) return
+
+  geometrySyncQueued = true
+  queueMicrotask(() => {
+    geometrySyncQueued = false
+    syncGeometry()
+  })
+}
+
+watch(() => props.isOverlayNav, scheduleGeometrySync, { flush: 'sync' })
+
+onMounted(() => {
+  isMounted = true
+  stateObserver = new MutationObserver(scheduleGeometrySync)
+  resizeObserver = typeof ResizeObserver === 'undefined' ? null : new ResizeObserver(() => scheduleGeometrySync())
+  usesResizeFallback = resizeObserver === null
+  if (usesResizeFallback) window.addEventListener('resize', scheduleGeometrySync, { passive: true })
+  else if (mainBackplateRef.value) resizeObserver?.observe(mainBackplateRef.value)
+
+  refreshObservedElements()
+  observeStateSources()
+  syncGeometry()
+  void nextTick(syncGeometry)
+})
+
+onBeforeUnmount(() => {
+  isMounted = false
+  stateObserver?.disconnect()
+  stateObserver = null
+  resizeObserver?.disconnect()
+  resizeObserver = null
+  if (usesResizeFallback) window.removeEventListener('resize', scheduleGeometrySync)
+  usesResizeFallback = false
+
+  for (const surface of GEOMETRY_SURFACES) bindGeometrySurface(surface, null)
+  observedShell = null
+  geometrySyncQueued = false
+  lastGeometryKey = ''
+})
 </script>
 
 <template>
   <div
+    ref="mainBackplateRef"
     class="glass-fixed-shell-backplate glass-fixed-shell-backplate--main"
     data-backplate-surface="main"
-    :style="transitionStyle"
+    :style="mainBackplateStyle"
     aria-hidden="true"
   >
     <div
@@ -46,6 +322,24 @@ const transitionStyle = computed(() => ({
     </div>
   </div>
 
+  <svg class="glass-fixed-shell-backplate__geometry" width="0" height="0" aria-hidden="true" focusable="false">
+    <defs>
+      <clipPath :id="clipPathId" clipPathUnits="objectBoundingBox">
+        <rect
+          v-for="(rect, index) in clipRects"
+          :key="GEOMETRY_SURFACES[index]"
+          :data-clip-surface="GEOMETRY_SURFACES[index]"
+          :height="rect.height"
+          :rx="rect.rx"
+          :ry="rect.ry"
+          :width="rect.width"
+          :x="rect.x"
+          :y="rect.y"
+        />
+      </clipPath>
+    </defs>
+  </svg>
+
   <div
     v-if="isOverlayNav"
     class="glass-fixed-shell-backplate glass-fixed-shell-backplate--overlay-nav"
@@ -89,6 +383,12 @@ const transitionStyle = computed(() => ({
   pointer-events: none;
 }
 
+.glass-fixed-shell-backplate__geometry {
+  position: fixed;
+  overflow: hidden;
+  pointer-events: none;
+}
+
 .glass-fixed-shell-backplate--main {
   --glass-fixed-shell-nav-inline-size: #{variables.$layout-vertical-nav-width};
 
diff --git a/src/components/theme/GlassNavbarRefractionDefs.vue b/src/components/theme/GlassNavbarRefractionDefs.vue
index 88c4fe68..2306984e 100644
--- a/src/components/theme/GlassNavbarRefractionDefs.vue
+++ b/src/components/theme/GlassNavbarRefractionDefs.vue
@@ -156,7 +156,9 @@ function isRefractionActive(surface: NavigationSurface) {
 
   if (surface === 'navbar') {
     return (
-      (shell.dataset.shellMode === 'desktop' && !shell.classList.contains('layout-horizontal-nav-active')) ||
+      (shell.dataset.shellMode === 'desktop' &&
+        !shell.classList.contains('layout-horizontal-nav-active') &&
+        !shell.classList.contains('layout-window-controls-overlay-shell')) ||
       (shell.classList.contains('layout-navbar-floating-eligible') &&
         shell.classList.contains('layout-navbar-away-from-top'))
     )
diff --git a/src/components/theme/__tests__/GlassFixedShellBackplate.spec.ts b/src/components/theme/__tests__/GlassFixedShellBackplate.spec.ts
index d41a5d04..baa0e606 100644
--- a/src/components/theme/__tests__/GlassFixedShellBackplate.spec.ts
+++ b/src/components/theme/__tests__/GlassFixedShellBackplate.spec.ts
@@ -1,5 +1,6 @@
-import { mount } from '@vue/test-utils'
-import { describe, expect, it } from 'vitest'
+import { flushPromises, mount } from '@vue/test-utils'
+import { nextTick } from 'vue'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import GlassFixedShellBackplate from '@/components/theme/GlassFixedShellBackplate.vue'
 import type { GlassFixedShellBackplateLayer } from '@/composables/useGlassFixedShellBackplate'
 
@@ -26,9 +27,146 @@ const initialLayers: readonly GlassFixedShellBackplateLayer[] = [
   },
 ]
 
+interface TestRect {
+  bottom: number
+  height: number
+  left: number
+  right: number
+  top: number
+  width: number
+  toJSON: () => Record<string, never>
+}
+
+interface BackplateMountOptions {
+  [key: string]: unknown
+  attachTo?: Element
+  props: {
+    isOverlayNav: boolean
+    isOverlayNavActive: boolean
+    layers: readonly GlassFixedShellBackplateLayer[]
+    transitionDurationMs: number
+  }
+}
+
+const mountedWrappers: Array<ReturnType<typeof mount>> = []
+let resizeCallback: ResizeObserverCallback | undefined
+let resizeDisconnect: ReturnType<typeof vi.fn> | undefined
+let backplateRect: TestRect
+let sidebarRect: TestRect
+let navbarRect: TestRect
+
+function createRect(left: number, top: number, width: number, height: number): TestRect {
+  return {
+    bottom: top + height,
+    height,
+    left,
+    right: left + width,
+    top,
+    toJSON: () => ({}),
+    width,
+  }
+}
+
+function mountBackplate(options: BackplateMountOptions) {
+  const wrapper = mount(GlassFixedShellBackplate, options)
+  mountedWrappers.push(wrapper)
+  return wrapper
+}
+
+function mountConnectedShell(horizontal = false) {
+  const shell = document.createElement('div')
+  shell.className = `layout-wrapper${horizontal ? ' layout-horizontal-nav-active' : ''}`
+  shell.dataset.shellMode = 'desktop'
+  shell.dataset.shellNavbarAttachment = horizontal ? 'theme-qualified' : 'connected'
+
+  const sidebar = document.createElement('aside')
+  sidebar.className = 'layout-vertical-nav'
+  const navbar = document.createElement('header')
+  navbar.className = 'layout-navbar'
+  shell.append(sidebar, navbar)
+  document.body.append(shell)
+
+  return {
+    navbar,
+    shell,
+    sidebar,
+    wrapper: mountBackplate({
+      attachTo: shell,
+      props: {
+        isOverlayNav: false,
+        isOverlayNavActive: false,
+        layers: initialLayers,
+        transitionDurationMs: 1500,
+      },
+    }),
+  }
+}
+
+async function settleGeometry() {
+  await nextTick()
+  await flushPromises()
+  await nextTick()
+  await Promise.resolve()
+}
+
 describe('GlassFixedShellBackplate', () => {
+  beforeEach(() => {
+    resizeCallback = undefined
+    resizeDisconnect = vi.fn()
+    backplateRect = createRect(5, 3, 1185, 790)
+    sidebarRect = createRect(13, 11, 252, 774)
+    navbarRect = createRect(273, 11, 909, 72)
+
+    vi.stubGlobal(
+      'ResizeObserver',
+      class {
+        constructor(callback: ResizeObserverCallback) {
+          resizeCallback = callback
+        }
+
+        observe() {}
+
+        unobserve() {}
+
+        disconnect() {
+          resizeDisconnect?.()
+        }
+      },
+    )
+    vi.spyOn(HTMLElement.prototype, 'getBoundingClientRect').mockImplementation(function (this: HTMLElement) {
+      if (this.classList.contains('glass-fixed-shell-backplate--main')) return backplateRect as DOMRect
+      if (this.classList.contains('layout-vertical-nav')) return sidebarRect as DOMRect
+      if (this.classList.contains('layout-navbar')) return navbarRect as DOMRect
+      return createRect(0, 0, 0, 0) as DOMRect
+    })
+    vi.spyOn(window, 'getComputedStyle').mockImplementation(
+      element =>
+        ({
+          borderBottomLeftRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderBottomRightRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderEndEndRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderEndStartRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderStartEndRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderStartStartRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderTopLeftRadius: element instanceof HTMLElement ? '16px' : '0px',
+          borderTopRightRadius: element instanceof HTMLElement ? '16px' : '0px',
+          getPropertyValue: (property: string) => (property.includes('radius') ? '16px' : ''),
+        }) as unknown as CSSStyleDeclaration,
+    )
+    document.documentElement.dataset.theme = 'glass'
+  })
+
+  afterEach(() => {
+    for (const wrapper of mountedWrappers.splice(0)) wrapper.unmount()
+    document.querySelectorAll('.layout-wrapper').forEach(element => element.remove())
+    document.documentElement.removeAttribute('data-theme')
+    vi.restoreAllMocks()
+    vi.unstubAllGlobals()
+  })
+
   it('renders the App-owned slots once for the shared desktop shell', () => {
-    const wrapper = mount(GlassFixedShellBackplate, {
+    const wrapper = mountBackplate({
       props: {
         isOverlayNav: false,
         isOverlayNavActive: false,
@@ -51,7 +189,7 @@ describe('GlassFixedShellBackplate', () => {
   })
 
   it('preserves slot nodes while their active and previous roles swap', async () => {
-    const wrapper = mount(GlassFixedShellBackplate, {
+    const wrapper = mountBackplate({
       props: {
         isOverlayNav: false,
         isOverlayNavActive: false,
@@ -76,7 +214,7 @@ describe('GlassFixedShellBackplate', () => {
   })
 
   it('adds a separately clipped surface only for mobile overlay navigation', () => {
-    const wrapper = mount(GlassFixedShellBackplate, {
+    const wrapper = mountBackplate({
       props: {
         isOverlayNav: true,
         isOverlayNavActive: true,
@@ -90,4 +228,71 @@ describe('GlassFixedShellBackplate', () => {
     expect(overlay.classes()).toContain('is-visible')
     expect(overlay.findAll('[data-backplate-slot]')).toHaveLength(2)
   })
+
+  it('maps both connected surfaces to backplate-relative objectBoundingBox geometry', async () => {
+    const { wrapper } = mountConnectedShell()
+    await settleGeometry()
+
+    const main = wrapper.get('[data-backplate-surface="main"]')
+    const mainElement = main.element as HTMLElement
+    const clipPath = wrapper.get('clipPath')
+    const rects = clipPath.findAll('rect')
+
+    expect(clipPath.attributes('clipPathUnits')).toBe('objectBoundingBox')
+    expect(rects).toHaveLength(2)
+    expect(mainElement.style.clipPath).toMatch(/^url\(#glass-fixed-shell-clip-/u)
+    expect(Number(rects[0].attributes('x'))).toBeCloseTo(8 / 1185, 8)
+    expect(Number(rects[0].attributes('y'))).toBeCloseTo(8 / 790, 8)
+    expect(Number(rects[0].attributes('width'))).toBeCloseTo(252 / 1185, 8)
+    expect(Number(rects[0].attributes('height'))).toBeCloseTo(774 / 790, 8)
+    expect(Number(rects[0].attributes('rx'))).toBeCloseTo(16 / 1185, 8)
+    expect(Number(rects[0].attributes('ry'))).toBeCloseTo(16 / 790, 8)
+    expect(Number(rects[1].attributes('x'))).toBeCloseTo(268 / 1185, 8)
+    expect(Number(rects[1].attributes('y'))).toBeCloseTo(8 / 790, 8)
+    expect(Number(rects[1].attributes('width'))).toBeCloseTo(909 / 1185, 8)
+    expect(Number(rects[1].attributes('height'))).toBeCloseTo(72 / 790, 8)
+    expect(Number(rects[1].attributes('rx'))).toBeCloseTo(16 / 1185, 8)
+    expect(Number(rects[1].attributes('ry'))).toBeCloseTo(16 / 790, 8)
+    expect(wrapper.findAll('[data-backplate-surface="main"]')).toHaveLength(1)
+    expect(wrapper.findAll('[data-backplate-slot]')).toHaveLength(2)
+  })
+
+  it('does not activate the connected clip for horizontal navigation', async () => {
+    const { wrapper } = mountConnectedShell(true)
+    await settleGeometry()
+
+    expect((wrapper.get('[data-backplate-surface="main"]').element as HTMLElement).style.clipPath).toBe('')
+    expect(wrapper.findAll('clipPath rect')).toHaveLength(0)
+  })
+
+  it('refreshes dimensions and disconnects the resize observer on unmount', async () => {
+    const { wrapper } = mountConnectedShell()
+    await settleGeometry()
+
+    backplateRect = createRect(5, 3, 1180, 790)
+    sidebarRect = createRect(13, 11, 60, 774)
+    navbarRect = createRect(273, 11, 904, 96)
+    resizeCallback?.([], {} as ResizeObserver)
+    await settleGeometry()
+
+    const rects = wrapper.findAll('clipPath rect')
+    expect(Number(rects[0].attributes('width'))).toBeCloseTo(60 / 1180, 8)
+    expect(Number(rects[1].attributes('x'))).toBeCloseTo(268 / 1180, 8)
+    expect(Number(rects[1].attributes('height'))).toBeCloseTo(96 / 790, 8)
+
+    wrapper.unmount()
+    expect(resizeDisconnect).toHaveBeenCalledOnce()
+  })
+
+  it('uses window resize when ResizeObserver is unavailable', async () => {
+    vi.stubGlobal('ResizeObserver', undefined)
+    const { wrapper } = mountConnectedShell()
+    await settleGeometry()
+
+    sidebarRect = createRect(13, 11, 60, 774)
+    window.dispatchEvent(new Event('resize'))
+    await settleGeometry()
+
+    expect(Number(wrapper.find('clipPath rect').attributes('width'))).toBeCloseTo(60 / 1185, 8)
+  })
 })
diff --git a/src/styles/themes/_glass-v3.scss b/src/styles/themes/_glass-v3.scss
index d41c51e1..7a512e32 100644
--- a/src/styles/themes/_glass-v3.scss
+++ b/src/styles/themes/_glass-v3.scss
@@ -1,3 +1,5 @@
+@use '@configured-variables' as variables;
+
 // V3 表面按信息角色统一材料；只改变承载层，不改变图表、业务数据与交互命中区。
 @mixin surfaces {
   html[data-theme='glass'] {
@@ -106,6 +108,19 @@
         border-inline-start: 1px solid rgba(255, 255, 255, 0.12);
       }
 
+      .layout-page-content .site-card .border-t .text-medium-emphasis {
+        // 上传/下载是核心读数，信息权重高于网址和能力标识。
+        color: rgb(var(--v-theme-on-surface)) !important;
+        font-weight: 600;
+        font-variant-numeric: tabular-nums;
+      }
+
+      .layout-page-content .site-card h3,
+      .layout-page-content .plugin-card__banner .v-card-title {
+        font-weight: 650;
+        letter-spacing: 0;
+      }
+
       .layout-page-content .plugin-card__banner {
         --plugin-card-banner-scrim: linear-gradient(rgba(23, 27, 32, 0.035), rgba(23, 27, 32, 0.1));
         --plugin-card-banner-tint: linear-gradient(
@@ -140,6 +155,42 @@
     }
   }
 
+  // 固定导航保留布局占位，玻璃实体在占位内留出空气，采样几何仍由真实元素提供。
+  html[data-theme='glass']
+    body[data-theme='glass']
+    .layout-wrapper[data-shell-mode='desktop']:not(
+      .layout-horizontal-nav-active,
+      .layout-window-controls-overlay-shell
+    ) {
+    --glass-v3-nav-reserved-width: #{variables.$layout-vertical-nav-width};
+
+    &.layout-vertical-nav-collapsed {
+      --glass-v3-nav-reserved-width: #{variables.$layout-vertical-nav-collapsed-width};
+    }
+
+    .layout-vertical-nav {
+      border-radius: 16px;
+      box-shadow: var(--glass-v3-shadow) !important;
+      block-size: calc(100% - 16px);
+      inline-size: calc(var(--glass-v3-nav-reserved-width) - 8px) !important;
+      inset-block-start: 8px;
+      inset-inline-start: 8px;
+      overflow: clip;
+    }
+
+    &.layout-vertical-nav-collapsed .layout-vertical-nav.hovered {
+      inline-size: calc(#{variables.$layout-vertical-nav-width} - 8px) !important;
+    }
+
+    .layout-navbar {
+      border-radius: 16px !important;
+      inline-size: calc(100% - var(--glass-v3-nav-reserved-width) - 16px) !important;
+      inset-block-start: 8px !important;
+      inset-inline-start: calc(var(--glass-v3-nav-reserved-width) + 8px) !important;
+      overflow: clip;
+    }
+  }
+
   @media (hover: hover) {
     html[data-theme='glass'] body[data-theme='glass'] {
       .layout-page-content
diff --git a/src/utils/__tests__/glassNavbarRefraction.spec.ts b/src/utils/__tests__/glassNavbarRefraction.spec.ts
index ca5ff034..1b8b870d 100644
--- a/src/utils/__tests__/glassNavbarRefraction.spec.ts
+++ b/src/utils/__tests__/glassNavbarRefraction.spec.ts
@@ -77,6 +77,8 @@ describe('createGlassNavbarDisplacementField', () => {
     { width: 127, height: 64, radius: 32 },
     { width: 260, height: 800, radius: 0 },
     { width: 68, height: 862, radius: 0 },
+    { width: 252, height: 846, radius: 16 },
+    { width: 60, height: 846, radius: 16 },
   ])('keeps two-dimensional sampling forward and inside the image for $width x $height r$radius', geometry => {
     for (const deformation of [0, 48, 100])
       for (const translation of [0, 48, 100])