diff --git a/ScreenShot_2026-01-29_094743_454.png b/ScreenShot_2026-01-29_094743_454.png
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diff --git a/ScreenShot_2026-01-29_101729_394.png b/ScreenShot_2026-01-29_101729_394.png
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diff --git a/app/src/App.vue b/app/src/App.vue
index 216a05a..7c8c563 100644
--- a/app/src/App.vue
+++ b/app/src/App.vue
@@ -4,12 +4,13 @@
       :groups="sidebarGroups"
       :base-overrides="sidebarOverrides"
       :hidden-base-ids="hiddenBaseIds"
+      @select="handleSidebarSelect"
       @add="openAddGroup"
       @edit-group="openEditGroup"
       @remove-group="handleRemoveGroup"
       @settings="toggleSettings"
     />
-    <MainContent />
+    <MainContent :active-group-id="activeGroupId" />
     <TheContextMenu
       @add-icon="openAddIcon"
       @edit-icon="openEditIcon"
@@ -99,6 +100,8 @@ const isSettingsOpen = ref(false);
 const addIconMode = ref<'add' | 'replace-widget'>('add');
 const addIconInitialTab = ref<'widgets' | 'sites' | 'custom'>('widgets');
 const replaceWidgetId = ref<string | null>(null);
+const defaultGroupId = 'home';
+const activeGroupId = ref<string | null>(defaultGroupId);
 const editTarget = ref<{ id: string; source: 'base' | 'group' } | null>(null);
 const layoutStore = useLayoutStore();
 const widgetsStore = useWidgetsStore();
@@ -154,6 +157,10 @@ const toggleSettings = () => {
   isSettingsOpen.value = !isSettingsOpen.value;
 };
 
+const handleSidebarSelect = (id: string) => {
+  activeGroupId.value = id;
+};
+
 const openAddIcon = () => {
   addIconMode.value = 'add';
   addIconInitialTab.value = 'widgets';
@@ -252,6 +259,7 @@ const handleAddIcon = (payload: { name: string; url: string; bgColor: string; im
     bgColor: payload.bgColor,
     img: payload.img,
     text: payload.text,
+    groupId: activeGroupId.value ?? defaultGroupId,
   });
 };
 
@@ -270,6 +278,7 @@ const handleAddWidget = (payload: { component: string; size?: '1x1' | '1x2' | '2
     component: payload.component,
     size: payload.size,
     data: payload.data,
+    groupId: activeGroupId.value ?? defaultGroupId,
   });
 };
 
diff --git a/app/src/components/GridCanvas/index.vue b/app/src/components/GridCanvas/index.vue
index 553806d..6475d99 100644
--- a/app/src/components/GridCanvas/index.vue
+++ b/app/src/components/GridCanvas/index.vue
@@ -19,6 +19,7 @@ interface Icon {
   text?: string;
   bgColor?: string;
   size?: GridItemSize;
+  groupId?: string;
 }
 
 type WidgetSize = GridItemSize;
@@ -27,6 +28,7 @@ interface Widget {
   component: string;
   size: WidgetSize;
   data?: any;
+  groupId?: string;
 }
 
 interface GridOrderEntry {
@@ -39,6 +41,11 @@ type OrderedGridItem =
   | { type: 'widget'; id: string; widget: Widget };
 
 const GRID_ORDER_STORAGE_KEY = 'itab_grid_order';
+const DEFAULT_GROUP_ID = 'home';
+
+const props = defineProps<{
+  activeGroupId?: string | null;
+}>();
 
 const layoutStore = useLayoutStore();
 const widgetsStore = useWidgetsStore();
@@ -59,6 +66,22 @@ const previousIconIds = ref(new Set<string>());
 const previousWidgetIds = ref(new Set<string>());
 const layoutAnimationMs = 240;
 const layoutEasing = 'cubic-bezier(0.4, 0, 0.2, 1)';
+const normalizeGroupId = (groupId?: string | null) => groupId ?? DEFAULT_GROUP_ID;
+const activeGroupId = computed(() => normalizeGroupId(props.activeGroupId));
+
+const normalizeGridOrder = (order: GridOrderEntry[]) => {
+  const seen = new Set<string>();
+  const normalized: GridOrderEntry[] = [];
+  for (const entry of order) {
+    if (!entry || typeof entry.id !== 'string') continue;
+    if (entry.type !== 'icon' && entry.type !== 'widget') continue;
+    const key = `${entry.type}:${entry.id}`;
+    if (seen.has(key)) continue;
+    seen.add(key);
+    normalized.push(entry);
+  }
+  return normalized;
+};
 
 const buildDefaultOrder = (): GridOrderEntry[] => [
   ...widgetsStore.widgets.map(widget => ({ id: widget.id, type: 'widget' as const })),
@@ -85,7 +108,7 @@ const loadGridOrder = () => {
     try {
       const parsed = JSON.parse(saved) as GridOrderEntry[];
       if (Array.isArray(parsed)) {
-        gridOrder.value = parsed.filter(item => item?.id && (item.type === 'icon' || item.type === 'widget'));
+        gridOrder.value = normalizeGridOrder(parsed);
       }
     } catch {
       gridOrder.value = [];
@@ -100,26 +123,36 @@ const loadGridOrder = () => {
 const ensureOrderConsistency = () => {
   const iconIds = new Set(layoutStore.icons.map(icon => icon.id));
   const widgetIds = new Set(widgetsStore.widgets.map(widget => widget.id));
+  const seen = new Set<string>();
   const nextOrder: GridOrderEntry[] = [];
 
+  const pushEntry = (entry: GridOrderEntry) => {
+    const key = `${entry.type}:${entry.id}`;
+    if (seen.has(key)) return;
+    seen.add(key);
+    nextOrder.push(entry);
+  };
+
   for (const entry of gridOrder.value) {
     if (entry.type === 'icon' && iconIds.has(entry.id)) {
-      nextOrder.push(entry);
+      pushEntry(entry);
     }
     if (entry.type === 'widget' && widgetIds.has(entry.id)) {
-      nextOrder.push(entry);
+      pushEntry(entry);
     }
   }
 
   for (const widget of widgetsStore.widgets) {
-    if (!nextOrder.some(item => item.type === 'widget' && item.id === widget.id)) {
-      nextOrder.push({ id: widget.id, type: 'widget' });
+    const key = `widget:${widget.id}`;
+    if (!seen.has(key)) {
+      pushEntry({ id: widget.id, type: 'widget' });
     }
   }
 
   for (const icon of layoutStore.icons) {
-    if (!nextOrder.some(item => item.type === 'icon' && item.id === icon.id)) {
-      nextOrder.push({ id: icon.id, type: 'icon' });
+    const key = `icon:${icon.id}`;
+    if (!seen.has(key)) {
+      pushEntry({ id: icon.id, type: 'icon' });
     }
   }
 
@@ -137,6 +170,9 @@ const ensureOrderConsistency = () => {
   }
 };
 
+const isInActiveGroup = (groupId?: string | null) =>
+  normalizeGroupId(groupId) === activeGroupId.value;
+
 const orderedItems = computed<OrderedGridItem[]>(() => {
   const iconsById = new Map(layoutStore.icons.map(icon => [icon.id, icon]));
   const widgetsById = new Map(widgetsStore.widgets.map(widget => [widget.id, widget]));
@@ -146,13 +182,13 @@ const orderedItems = computed<OrderedGridItem[]>(() => {
   for (const entry of gridOrder.value) {
     if (entry.type === 'icon') {
       const icon = iconsById.get(entry.id);
-      if (icon) {
+      if (icon && isInActiveGroup(icon.groupId)) {
         items.push({ type: 'icon', id: icon.id, icon });
         used.add(`icon:${icon.id}`);
       }
     } else {
       const widget = widgetsById.get(entry.id);
-      if (widget) {
+      if (widget && isInActiveGroup(widget.groupId)) {
         items.push({ type: 'widget', id: widget.id, widget });
         used.add(`widget:${widget.id}`);
       }
@@ -161,14 +197,14 @@ const orderedItems = computed<OrderedGridItem[]>(() => {
 
   for (const widget of widgetsStore.widgets) {
     const key = `widget:${widget.id}`;
-    if (!used.has(key)) {
+    if (!used.has(key) && isInActiveGroup(widget.groupId)) {
       items.push({ type: 'widget', id: widget.id, widget });
     }
   }
 
   for (const icon of layoutStore.icons) {
     const key = `icon:${icon.id}`;
-    if (!used.has(key)) {
+    if (!used.has(key) && isInActiveGroup(icon.groupId)) {
       items.push({ type: 'icon', id: icon.id, icon });
     }
   }
@@ -222,7 +258,36 @@ const persistOrderFromGrid = async () => {
     }
   }
   if (nextOrder.length) {
-    applyGridOrder(nextOrder, true);
+    if (!gridOrder.value.length) {
+      applyGridOrder(nextOrder, true);
+    } else {
+      const entryKey = (entry: GridOrderEntry) => `${entry.type}:${entry.id}`;
+      const visibleKeys = new Set(nextOrder.map(entryKey));
+      const visibleQueue = [...nextOrder];
+      const merged: GridOrderEntry[] = [];
+
+      for (const entry of gridOrder.value) {
+        if (visibleKeys.has(entryKey(entry))) {
+          const nextEntry = visibleQueue.shift();
+          if (nextEntry) {
+            merged.push(nextEntry);
+          }
+        } else {
+          merged.push(entry);
+        }
+      }
+
+      const mergedKeys = new Set(merged.map(entryKey));
+      for (const entry of visibleQueue) {
+        const key = entryKey(entry);
+        if (!mergedKeys.has(key)) {
+          merged.push(entry);
+          mergedKeys.add(key);
+        }
+      }
+
+      applyGridOrder(merged, true);
+    }
   }
   await nextTick();
   grid.value?.synchronize();
@@ -247,7 +312,11 @@ const syncGridItems = () => {
 const refreshLayout = async (instant = false) => {
   await nextTick();
   syncGridItems();
+  grid.value?.synchronize();
   grid.value?.refreshItems();
+  if (grid.value?._settings?.layout) {
+    grid.value._settings.layout.fillGaps = true;
+  }
   if (instant) {
     grid.value?.layout(true);
   } else {
@@ -283,6 +352,7 @@ const syncSizeMap = (
 
 onMounted(async () => {
   loadGridOrder();
+  ensureOrderConsistency();
   previousIconIds.value = new Set(layoutStore.icons.map(icon => icon.id));
   previousWidgetIds.value = new Set(widgetsStore.widgets.map(widget => widget.id));
   await nextTick();
@@ -296,7 +366,7 @@ onMounted(async () => {
     },
     dragSort: true,
     layout: {
-      fillGaps: settingsStore.autoAlign,
+      fillGaps: true,
       rounding: true,
     },
     layoutDuration: layoutAnimationMs,
@@ -388,12 +458,10 @@ watch(
 );
 
 watch(
-  () => settingsStore.autoAlign,
-  value => {
+  () => props.activeGroupId,
+  () => {
     if (!grid.value) return;
-    // Muuri has no public setter for fillGaps; update internal setting and relayout.
-    grid.value._settings.layout.fillGaps = value;
-    grid.value.layout(true);
+    refreshLayout(true);
   }
 );
 
@@ -475,8 +543,7 @@ onUnmounted(() => {
 }
 
 .grid-item.is-resized {
-  overflow: hidden;
-  border-radius: $border-radius-small;
+  overflow: visible;
 }
 
 .grid-item.is-entering {
diff --git a/app/src/components/IconCard/index.vue b/app/src/components/IconCard/index.vue
index 640cd4a..ae6ce95 100644
--- a/app/src/components/IconCard/index.vue
+++ b/app/src/components/IconCard/index.vue
@@ -10,7 +10,6 @@
       <img v-if="props.icon.img" :src="props.icon.img" :alt="props.icon.name" />
       <span v-else>{{ props.icon.text?.trim() || props.icon.name.charAt(0) }}</span>
     </div>
-    <div class="card-spacer"></div>
     <div class="label">{{ props.icon.name }}</div>
   </a>
 </template>
@@ -38,9 +37,8 @@ const props = defineProps<{
 @import '@/styles/tokens.scss';
 
 .icon-card-wrapper {
-  display: grid;
-  grid-template-rows: minmax(0, 1fr) var(--icon-label-margin-top) auto;
-  align-items: stretch;
+  position: relative;
+  display: block;
   width: 100%;
   height: 100%;
   text-decoration: none;
@@ -83,27 +81,21 @@ const props = defineProps<{
   }
 }
 
-.card-spacer {
-  height: 100%;
-  pointer-events: none;
-}
-
-.icon-card-wrapper.size-1x1 .icon-card {
-  width: auto;
-  height: 100%;
-  aspect-ratio: 1 / 1;
-  justify-self: center;
-}
-
 .label {
+  position: absolute;
+  top: 100%;
+  left: 50%;
+  margin-top: var(--icon-label-margin-top);
+  transform: translateX(-50%);
   font-size: var(--icon-label-font-size);
   color: $color-text-primary;
   text-align: center;
   width: 100%;
-  display: var(--icon-label-display, block);
-  white-space: normal;
-  word-break: break-word;
+  max-width: 100%;
+  visibility: var(--icon-label-visibility, visible);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
   line-height: 1.2;
-  pointer-events: none;
 }
 </style>
diff --git a/app/src/components/MainContent/index.vue b/app/src/components/MainContent/index.vue
index 66f0b0a..71ea6a6 100644
--- a/app/src/components/MainContent/index.vue
+++ b/app/src/components/MainContent/index.vue
@@ -1,14 +1,16 @@
 <template>
   <main class="main-content" @contextmenu="handleDesktopContextMenu">
     <div class="main-content-container">
-      <TheClock
-        v-if="showClock"
-        :show-date="showDate"
-        :show-seconds="showSeconds"
-        :use-24-hour="use24Hour"
-      />
-      <TheSearchBar v-if="showSearch" />
-      <GridCanvas />
+      <div v-if="showClock || showSearch" class="content-header">
+        <TheClock
+          v-if="showClock"
+          :show-date="showDate"
+          :show-seconds="showSeconds"
+          :use-24-hour="use24Hour"
+        />
+        <TheSearchBar v-if="showSearch" />
+      </div>
+      <GridCanvas :active-group-id="activeGroupId" />
     </div>
   </main>
 </template>
@@ -24,6 +26,10 @@ import GridCanvas from '@/components/GridCanvas/index.vue';
 import { useSettingsStore } from '@/store/useSettingsStore';
 import { storeToRefs } from 'pinia';
 
+defineProps<{
+  activeGroupId?: string | null;
+}>();
+
 const uiStore = useUIStore();
 const settingsStore = useSettingsStore();
 const { showSearch, showClock, showDate, showSeconds, use24Hour } = storeToRefs(settingsStore);
@@ -49,6 +55,13 @@ const handleDesktopContextMenu = (event: MouseEvent) => {
   justify-content: center;
   align-items: flex-start; // 内容顶部对齐
   overflow-y: auto;
+  scrollbar-width: none;
+  -ms-overflow-style: none;
+}
+
+.main-content::-webkit-scrollbar {
+  width: 0;
+  height: 0;
 }
 
 .main-content-container {
@@ -59,4 +72,15 @@ const handleDesktopContextMenu = (event: MouseEvent) => {
   flex-direction: column;
   align-items: center;
 }
+
+.content-header {
+  position: sticky;
+  top: var(--content-padding);
+  z-index: 2;
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  align-self: stretch;
+}
 </style>
diff --git a/app/src/components/SettingsPanel/index.vue b/app/src/components/SettingsPanel/index.vue
index a9a3aee..d38e5b8 100644
--- a/app/src/components/SettingsPanel/index.vue
+++ b/app/src/components/SettingsPanel/index.vue
@@ -179,12 +179,12 @@
                         <div class="row-desc">用网格密度统一控制图标与组件大小。</div>
                       </div>
                       <input
-                        v-model.number="layoutDensity"
+                        v-model.number="iconSizeDensity"
                         class="settings-range"
                         type="range"
-                        min="1"
-                        max="4"
-                        step="1"
+                        :min="layoutDensityRange.min"
+                        :max="layoutDensityRange.max"
+                        :step="layoutDensityRange.step"
                       />
                     </div>
                     <div class="settings-row">
@@ -362,6 +362,7 @@ import { useSettingsStore } from '@/store/useSettingsStore';
 import {
   iconDensityRange,
   iconRadiusRange,
+  layoutDensityRange,
   searchProviders,
   themePresets,
 } from '@/config/settingsPresets';
@@ -441,9 +442,13 @@ const themeId = computed({
   set: value => settingsStore.setSetting('themeId', value as typeof settingsStore.themeId),
 });
 
-const layoutDensity = computed({
-  get: () => settingsStore.layoutDensity,
-  set: value => settingsStore.setSetting('layoutDensity', value),
+const invertLayoutDensity = (value: number) =>
+  layoutDensityRange.max + layoutDensityRange.min -
+  Math.min(Math.max(value, layoutDensityRange.min), layoutDensityRange.max);
+
+const iconSizeDensity = computed({
+  get: () => invertLayoutDensity(settingsStore.layoutDensity),
+  set: value => settingsStore.setSetting('layoutDensity', invertLayoutDensity(value)),
 });
 
 const compactSidebar = computed({
@@ -656,7 +661,6 @@ const clampRange = (value: number, min: number, max: number) =>
 const applyImportedSettings = (settings: Partial<typeof settingsStore.$state>) => {
   const providerIds = new Set(searchProviders.map(item => item.id));
   const themeIds = new Set(themePresets.map(item => item.id));
-  const layoutDensityValues = new Set([1, 2, 3, 4]);
 
   if (typeof settings.showSearch === 'boolean') {
     settingsStore.setSetting('showSearch', settings.showSearch);
@@ -709,8 +713,11 @@ const applyImportedSettings = (settings: Partial<typeof settingsStore.$state>) =
       clampRange(settings.iconDensity, iconDensityRange.min, iconDensityRange.max)
     );
   }
-  if (typeof settings.layoutDensity === 'number' && layoutDensityValues.has(settings.layoutDensity)) {
-    settingsStore.setSetting('layoutDensity', settings.layoutDensity as typeof settingsStore.layoutDensity);
+  if (typeof settings.layoutDensity === 'number') {
+    settingsStore.setSetting(
+      'layoutDensity',
+      clampRange(settings.layoutDensity, layoutDensityRange.min, layoutDensityRange.max)
+    );
   }
 };
 
diff --git a/app/src/components/TheSidebar/index.vue b/app/src/components/TheSidebar/index.vue
index d503f68..1d5e1ea 100644
--- a/app/src/components/TheSidebar/index.vue
+++ b/app/src/components/TheSidebar/index.vue
@@ -169,6 +169,16 @@ const setActive = (id: string) => {
   localStorage.setItem(STORAGE_KEY, id);
 };
 
+watch(
+  () => activeId.value,
+  id => {
+    if (selectableItems.value.some(item => item.id === id)) {
+      emit('select', id);
+    }
+  },
+  { immediate: true }
+);
+
 const handleItemClick = (item: NavItem) => {
   if (item.action === 'add') {
     emit('add');
diff --git a/app/src/components/WidgetCard/index.vue b/app/src/components/WidgetCard/index.vue
index 7685d98..112500f 100644
--- a/app/src/components/WidgetCard/index.vue
+++ b/app/src/components/WidgetCard/index.vue
@@ -5,7 +5,6 @@
         <component :is="widgetComponent" :data="props.widget.data" :size="props.widget.size" />
       </div>
     </div>
-    <div class="card-spacer"></div>
     <div class="label label-below">{{ label }}</div>
   </div>
 </template>
@@ -41,29 +40,22 @@ const label = computed(() => {
 @import '@/styles/tokens.scss';
 
 .widget-card-wrapper {
+  position: relative;
   width: 100%;
   height: 100%;
-  display: grid;
-  grid-template-rows: minmax(0, 1fr) var(--icon-label-margin-top) auto;
   padding: var(--widget-card-padding, var(--icon-card-padding));
-
-  // 鏍规嵁灏哄绫诲悕鎺у埗灏哄
-  &.size-1x1 { grid-column: span 1; grid-row: span 1; }
-  &.size-1x2 { grid-column: span 1; grid-row: span 2; }
-  &.size-2x1 { grid-column: span 2; grid-row: span 1; }
-  &.size-2x2 { grid-column: span 2; grid-row: span 2; }
-  &.size-2x4 { grid-column: span 2; grid-row: span 4; }
-
+  box-sizing: border-box;
 }
 
 .widget-card {
+  box-sizing: border-box;
   width: 100%;
   height: 100%;
   min-height: 0;
   background-color: $color-surface-1;
   backdrop-filter: blur($backdrop-filter-blur) saturate($backdrop-filter-saturation);
   border: 1px solid rgba(255, 255, 255, 0.1);
-  border-radius: $border-radius-small;
+  border-radius: var(--icon-radius, #{$border-radius-small});
   box-shadow: $shadow-md;
   display: flex;
   flex-direction: column;
@@ -72,31 +64,26 @@ const label = computed(() => {
   transform-origin: center;
 }
 
-.card-spacer {
-  height: 100%;
-  pointer-events: none;
-}
-
-.widget-card-wrapper.size-1x1 .widget-card {
-  width: auto;
-  height: 100%;
-  aspect-ratio: 1 / 1;
-  justify-self: center;
-}
-
 .widget-content {
   flex-grow: 1;
   padding: var(--widget-content-padding);
 }
 
 .label {
+  position: absolute;
+  top: 100%;
+  left: 50%;
+  margin-top: var(--icon-label-margin-top);
+  transform: translateX(-50%);
   font-size: var(--widget-label-font-size);
   color: $color-text-primary;
   text-align: center;
   width: 100%;
-  display: var(--widget-label-display, block);
-  white-space: normal;
-  word-break: break-word;
+  max-width: 100%;
+  visibility: var(--widget-label-visibility, visible);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
   line-height: 1.2;
   flex-shrink: 0;
 }
diff --git a/app/src/composables/useSettingsSync.ts b/app/src/composables/useSettingsSync.ts
index f543a2c..378182f 100644
--- a/app/src/composables/useSettingsSync.ts
+++ b/app/src/composables/useSettingsSync.ts
@@ -53,8 +53,9 @@ export const useSettingsSync = () => {
     const baseGrid = layoutConfig.grid;
     const sizeScale = layoutPreset.cellSize / baseGrid.cellSize;
     const labelScale = clampRange(sizeScale, 0.7, 1);
+    const densityScale = getIconDensityScale(settingsStore.iconDensity);
     const iconPadding = Math.max(0, baseIcon.padding * sizeScale);
-    const widgetScale = sizeScale;
+    const widgetScale = 1;
     const widgetPadding = Math.max(0, baseIcon.padding * sizeScale);
     const iconFontSize = Math.max(14, Math.round(baseIcon.fontSize * sizeScale));
     const iconLabelFontSize = Math.max(10, Math.round(baseIcon.labelFontSize * labelScale));
@@ -67,11 +68,7 @@ export const useSettingsSync = () => {
       4,
       Math.round(layoutConfig.widget.labelPaddingY * labelScale)
     );
-    const densityScale = getIconDensityScale(settingsStore.iconDensity);
-    const baseVisualGap = (layoutPreset.gap + iconPadding * 2) * densityScale;
-    // Keep density purely controlling spacing; allow deeper negative gap for extra-tight layouts.
-    const minGap = -layoutPreset.cellSize * 0.75;
-    const gridGap = Math.max(minGap, baseVisualGap - iconPadding * 2);
+    const gridGap = Math.max(0, Math.round(baseGrid.gap * densityScale));
 
     setPx(root, '--grid-cell-size', layoutPreset.cellSize);
     setPx(root, '--grid-gap', gridGap);
@@ -82,16 +79,13 @@ export const useSettingsSync = () => {
     setPx(root, '--icon-font-size', iconFontSize);
     setPx(root, '--icon-label-font-size', iconLabelFontSize);
     setPx(root, '--icon-radius', iconRadius);
-    setPx(
-      root,
-      '--icon-label-margin-top',
-      settingsStore.showIconLabels ? iconLabelMarginTop : 0
-    );
+    setPx(root, '--icon-label-margin-top', iconLabelMarginTop);
     setPx(root, '--widget-label-font-size', widgetLabelFontSize);
     setPx(root, '--widget-label-padding-y', widgetLabelPaddingY);
 
-    setVar(root, '--icon-label-display', settingsStore.showIconLabels ? 'block' : 'none');
-    setVar(root, '--widget-label-display', settingsStore.showIconLabels ? 'block' : 'none');
+    const labelVisibility = settingsStore.showIconLabels ? 'visible' : 'hidden';
+    setVar(root, '--icon-label-visibility', labelVisibility);
+    setVar(root, '--widget-label-visibility', labelVisibility);
 
     const sidebarVars = getSidebarVars(settingsStore.compactSidebar);
     setPx(root, '--sidebar-width', sidebarVars.width);
diff --git a/app/src/config/layout.ts b/app/src/config/layout.ts
index dfe6f18..566a208 100644
--- a/app/src/config/layout.ts
+++ b/app/src/config/layout.ts
@@ -54,7 +54,7 @@ export const layoutConfig = {
     // 图标首字母字体大小（像素）。
     fontSize: 28,
     // 卡片内边距（像素）。
-    padding: 8,
+    padding: 0,
     // 图标卡片圆角（像素）。
     radius: 12,
     // 标签字体大小（像素）。
diff --git a/app/src/config/settingsPresets.ts b/app/src/config/settingsPresets.ts
index 4e11102..767016c 100644
--- a/app/src/config/settingsPresets.ts
+++ b/app/src/config/settingsPresets.ts
@@ -83,7 +83,7 @@ const clampRange = (value: number, min: number, max: number) =>
   Math.min(Math.max(value, min), max);
 
 export type LayoutDensityPreset = {
-  value: 1 | 2 | 3 | 4;
+  value: number;
   label: string;
   cellSize: number;
   gap: number;
@@ -119,19 +119,46 @@ export const layoutDensityPresets: LayoutDensityPreset[] = [
   },
 ];
 
-export const getLayoutDensityPreset = (value?: number) =>
-  layoutDensityPresets.find(item => item.value === value) ?? layoutDensityPresets[1];
+export const layoutDensityRange = {
+  min: 1,
+  max: 4,
+  step: 0.1,
+  default: 2,
+};
+
+export const getLayoutDensityPreset = (value?: number) => {
+  const normalized = clampRange(
+    typeof value === 'number' ? value : layoutDensityRange.default,
+    layoutDensityRange.min,
+    layoutDensityRange.max
+  );
+  const lower = Math.floor(normalized);
+  const upper = Math.ceil(normalized);
+  if (lower === upper) {
+    return layoutDensityPresets[lower - 1] ?? layoutDensityPresets[1];
+  }
+  const lowerPreset = layoutDensityPresets[lower - 1] ?? layoutDensityPresets[0];
+  const upperPreset = layoutDensityPresets[upper - 1] ??
+    layoutDensityPresets[layoutDensityPresets.length - 1];
+  const t = (normalized - lower) / (upper - lower);
+  return {
+    value: normalized,
+    label: t < 0.5 ? lowerPreset.label : upperPreset.label,
+    cellSize: Math.round(lowerPreset.cellSize + (upperPreset.cellSize - lowerPreset.cellSize) * t),
+    gap: Math.round(lowerPreset.gap + (upperPreset.gap - lowerPreset.gap) * t),
+  };
+};
 
 export const iconDensityRange = {
   min: 0,
-  max: 10,
+  max: 50,
   step: 1,
-  default: 5,
+  default: 25,
 };
 
 const iconDensityScaleRange = {
-  loose: 1.3,
-  dense: 0.05,
+  loose: 2,
+  dense: 0,
 };
 
 export const getIconDensityScale = (value?: number) => {
@@ -140,6 +167,7 @@ export const getIconDensityScale = (value?: number) => {
     iconDensityRange.min,
     iconDensityRange.max
   );
+  const ease = (t: number) => Math.pow(t, 0.5);
   if (normalized === iconDensityRange.default) {
     return 1;
   }
@@ -147,11 +175,12 @@ export const getIconDensityScale = (value?: number) => {
     // Smaller slider value = denser布局
     const t = (iconDensityRange.default - normalized) /
       (iconDensityRange.default - iconDensityRange.min);
-    return 1 - t * (1 - iconDensityScaleRange.dense);
+    return 1 - ease(t) * (1 - iconDensityScaleRange.dense);
   }
+
   const t = (normalized - iconDensityRange.default) /
     (iconDensityRange.max - iconDensityRange.default);
-  return 1 + t * (iconDensityScaleRange.loose - 1);
+  return 1 + ease(t) * (iconDensityScaleRange.loose - 1);
 };
 
 export const iconSizeRange = {
diff --git a/app/src/store/useLayoutStore.ts b/app/src/store/useLayoutStore.ts
index bb4f834..75e55cc 100644
--- a/app/src/store/useLayoutStore.ts
+++ b/app/src/store/useLayoutStore.ts
@@ -1,6 +1,7 @@
 import { defineStore, acceptHMRUpdate } from 'pinia';
 
 type IconSize = '1x1' | '1x2' | '2x1' | '2x2' | '2x4';
+const DEFAULT_GROUP_ID = 'home';
 
 // 模拟数据（来自截图参考）
 interface Icon {
@@ -11,6 +12,7 @@ interface Icon {
   img?: string; // 可选：用于图片图标（如徽标）
   text?: string; // 可选：用于文字图标
   bgColor?: string; // 可选：纯色背景
+  groupId?: string;
 }
 
 interface DragState {
@@ -47,10 +49,33 @@ const defaultIcons: Icon[] = [
   { id: '16', name: '书签管理', url: '#', bgColor: '#f1c40f' },
 ];
 
+const defaultGroupById: Record<string, string> = {
+  '1': 'product',
+  '2': 'product',
+  '3': 'home',
+  '4': 'product',
+  '5': 'fun',
+  '6': 'home',
+  '7': 'fun',
+  '8': 'fun',
+  '9': 'ai',
+  '10': 'fun',
+  '11': 'design',
+  '12': 'design',
+  '13': 'ai',
+  '14': 'code',
+  '15': 'home',
+  '16': 'home',
+};
+
 const savedIcons = localStorage.getItem('itab_icons');
 
 const normalizeIcons = (icons: Icon[]): Icon[] =>
-  icons.map(icon => ({ ...icon, size: icon.size ?? '1x1' }));
+  icons.map(icon => ({
+    ...icon,
+    size: icon.size ?? '1x1',
+    groupId: icon.groupId ?? defaultGroupById[icon.id] ?? DEFAULT_GROUP_ID,
+  }));
 
 const loadIcons = (): Icon[] => {
   if (!savedIcons) return normalizeIcons(defaultIcons);
@@ -77,7 +102,7 @@ export const useLayoutStore = defineStore('layout', {
   actions: {
     addIcon(icon: Omit<Icon, 'id'>) {
       const nextId = `custom-${Date.now()}-${Math.random().toString(36).slice(2, 6)}`;
-      this.icons.push({ ...icon, id: nextId });
+      this.icons.push({ ...icon, id: nextId, groupId: icon.groupId ?? DEFAULT_GROUP_ID });
       localStorage.setItem('itab_icons', JSON.stringify(this.icons));
     },
     updateIcon(iconId: string, updates: Partial<Omit<Icon, 'id'>>) {
diff --git a/app/src/store/useSettingsStore.ts b/app/src/store/useSettingsStore.ts
index 77ef221..d5b84c8 100644
--- a/app/src/store/useSettingsStore.ts
+++ b/app/src/store/useSettingsStore.ts
@@ -4,7 +4,7 @@ import {
   getThemePreset,
   iconDensityRange,
   iconRadiusRange,
-  layoutDensityPresets,
+  layoutDensityRange,
   searchProviders,
   themePresets,
   type SearchProviderId,
@@ -12,7 +12,7 @@ import {
 } from '@/config/settingsPresets';
 
 type IconDensity = number;
-type LayoutDensity = 1 | 2 | 3 | 4;
+type LayoutDensity = number;
 
 type SettingsState = {
   showSearch: boolean;
@@ -54,7 +54,6 @@ const defaultSettings: SettingsState = {
 
 const searchProviderIds = new Set(searchProviders.map(item => item.id));
 const themePresetIds = new Set(themePresets.map(item => item.id));
-const layoutDensityValues = new Set(layoutDensityPresets.map(item => item.value));
 const clampRange = (value: number, min: number, max: number) =>
   Math.min(Math.max(value, min), max);
 
@@ -92,10 +91,10 @@ const loadSettings = (): SettingsState => {
           ? parsed.themeId
           : defaultSettings.themeId,
       layoutDensity:
-        typeof parsed.layoutDensity === 'number' && layoutDensityValues.has(parsed.layoutDensity)
-          ? parsed.layoutDensity
+        typeof parsed.layoutDensity === 'number'
+          ? clampRange(parsed.layoutDensity, layoutDensityRange.min, layoutDensityRange.max)
           : defaultSettings.layoutDensity,
-      autoAlign: typeof parsed.autoAlign === 'boolean' ? parsed.autoAlign : defaultSettings.autoAlign,
+      autoAlign: defaultSettings.autoAlign,
       compactSidebar:
         typeof parsed.compactSidebar === 'boolean' ? parsed.compactSidebar : defaultSettings.compactSidebar,
       showGroupLabels:
diff --git a/app/src/store/useWidgetsStore.ts b/app/src/store/useWidgetsStore.ts
index 91a881b..1b38a10 100644
--- a/app/src/store/useWidgetsStore.ts
+++ b/app/src/store/useWidgetsStore.ts
@@ -2,12 +2,14 @@ import { defineStore, acceptHMRUpdate } from 'pinia';
 
 // 组件数据结构
 type WidgetSize = '1x1' | '1x2' | '2x1' | '2x2' | '2x4';
+const DEFAULT_GROUP_ID = 'home';
 interface Widget {
   id: string;
   component: string; // 渲染的组件名
   size: WidgetSize; // 组件尺寸
   gridPosition: { x: number; y: number }; // 网格位置
   data?: any; // 组件数据
+  groupId?: string;
 }
 
 interface WidgetsState {
@@ -46,13 +48,34 @@ const defaultWidgets: Widget[] = [
 
 const savedWidgets = localStorage.getItem('itab_widgets');
 
+const defaultGroupById: Record<string, string> = {
+  'widget-1': 'home',
+  'widget-2': 'fun',
+  'widget-3': 'product',
+};
+
+const normalizeWidgets = (widgets: Widget[]): Widget[] =>
+  widgets.map(widget => ({
+    ...widget,
+    groupId: widget.groupId ?? defaultGroupById[widget.id] ?? DEFAULT_GROUP_ID,
+  }));
+
+const loadWidgets = (): Widget[] => {
+  if (!savedWidgets) return normalizeWidgets(defaultWidgets);
+  try {
+    return normalizeWidgets(JSON.parse(savedWidgets) as Widget[]);
+  } catch {
+    return normalizeWidgets(defaultWidgets);
+  }
+};
+
 // 模拟数据（来自截图参考）
 export const useWidgetsStore = defineStore('widgets', {
   state: (): WidgetsState => ({
-    widgets: savedWidgets ? JSON.parse(savedWidgets) : defaultWidgets,
+    widgets: loadWidgets(),
   }),
   actions: {
-    addWidget(payload: { component: string; size?: WidgetSize; data?: any }) {
+    addWidget(payload: { component: string; size?: WidgetSize; data?: any; groupId?: string }) {
       const nextId = `widget-${Date.now()}-${Math.random().toString(36).slice(2, 6)}`;
       const nextWidget: Widget = {
         id: nextId,
@@ -60,6 +83,7 @@ export const useWidgetsStore = defineStore('widgets', {
         size: payload.size ?? '1x1',
         gridPosition: { x: 0, y: 0 },
         data: payload.data,
+        groupId: payload.groupId ?? DEFAULT_GROUP_ID,
       };
       this.widgets.push(nextWidget);
       localStorage.setItem('itab_widgets', JSON.stringify(this.widgets));