diff --git a/frontend/src/components/AppLayout.vue b/frontend/src/components/AppLayout.vue
index f605f22..f4d7327 100644
--- a/frontend/src/components/AppLayout.vue
+++ b/frontend/src/components/AppLayout.vue
@@ -1,78 +1,31 @@
 <template>
-  <a-layout style="height: 100vh; overflow: hidden" class="app-layout-collapsed">
+  <a-layout style="height: 100vh; overflow: hidden">
     <a-layout-sider
-      v-model:collapsed="collapsed"
-      collapsible
-      :trigger="null"
-      :width="180"
-      :collapsed-width="60"
+      :width="SIDER_WIDTH"
       :theme="isDark ? 'dark' : 'light'"
-      style="height: calc(100vh - 32px); position: fixed; left: 0; top: 32px; z-index: 100"
+      :style="{ height: 'calc(100vh - 32px)', position: 'fixed', left: '0', top: '32px', zIndex: 100, background: 'var(--app-sider-bg)', borderRight: '1px solid var(--app-sider-border-color)' }"
     >
       <div class="sider-content">
-<!--        &lt;!&ndash; 折叠按钮 &ndash;&gt;-->
-<!--        <div class="collapse-trigger" @click="toggleCollapse">-->
-<!--          <MenuFoldOutlined v-if="!collapsed" />-->
-<!--          <MenuUnfoldOutlined v-else />-->
-<!--        </div>-->
-
-        <!-- 主菜单容器 -->
-        <div class="main-menu-container">
-          <a-menu
-            mode="inline"
-            :inline-collapsed="collapsed"
-            :theme="isDark ? 'dark' : 'light'"
-            class="main-menu"
-            v-model:selectedKeys="selectedKeys"
-          >
-            <template v-for="item in mainMenuItems" :key="item.path">
-              <a-menu-item @click="goTo(item.path)" :data-title="item.label">
-                <template #icon>
-                  <component :is="item.icon" />
-                </template>
-                <span v-if="!collapsed" class="menu-text">{{ item.label }}</span>
-              </a-menu-item>
-            </template>
-          </a-menu>
-        </div>
-
-        <!-- 底部菜单（带3px底部内边距） -->
         <a-menu
           mode="inline"
-          :inline-collapsed="collapsed"
+          :theme="isDark ? 'dark' : 'light'"
+          v-model:selectedKeys="selectedKeys"
+          :items="mainMenuItems"
+          @click="onMenuClick"
+        />
+        <a-menu
+          mode="inline"
           :theme="isDark ? 'dark' : 'light'"
           class="bottom-menu"
           v-model:selectedKeys="selectedKeys"
-        >
-          <template v-for="item in bottomMenuItems" :key="item.path">
-            <a-menu-item @click="goTo(item.path)" :data-title="item.label">
-              <template #icon>
-                <component :is="item.icon" />
-              </template>
-              <span v-if="!collapsed" class="menu-text">{{ item.label }}</span>
-            </a-menu-item>
-          </template>
-        </a-menu>
+          :items="bottomMenuItems"
+          @click="onMenuClick"
+        />
       </div>
     </a-layout-sider>
 
-    <!-- 主内容区 -->
-    <a-layout
-      :style="{
-        marginLeft: collapsed ? '60px' : '180px',
-        transition: 'margin-left 0.2s',
-        height: 'calc(100vh - 32px)',
-      }"
-    >
-      <a-layout-content
-        class="content-area"
-        :style="{
-          padding: '24px',
-          background: isDark ? '#141414' : '#ffffff',
-          height: '100%',
-          overflow: 'auto',
-        }"
-      >
+    <a-layout :style="{ marginLeft: SIDER_WIDTH + 'px', height: 'calc(100vh - 32px)', transition: 'margin-left .2s' }">
+      <a-layout-content class="content-area">
         <router-view />
       </a-layout-content>
     </a-layout>
@@ -88,202 +41,92 @@ import {
   ControlOutlined,
   HistoryOutlined,
   SettingOutlined,
-  MenuFoldOutlined,
-  MenuUnfoldOutlined,
 } from '@ant-design/icons-vue'
-import { ref, computed } from 'vue'
+import { computed, h } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { useTheme } from '../composables/useTheme.ts'
+import type { MenuProps } from 'ant-design-vue'
+
+const SIDER_WIDTH = 140
 
 const router = useRouter()
 const route = useRoute()
 const { isDark } = useTheme()
 
-const collapsed = ref<boolean>(false)
+// 工具：生成菜单项
+const icon = (Comp: any) => () => h(Comp)
 
-// 菜单数据
 const mainMenuItems = [
-  { path: '/home', label: '主页', icon: HomeOutlined },
-  { path: '/scripts', label: '脚本管理', icon: FileTextOutlined },
-  { path: '/plans', label: '计划管理', icon: CalendarOutlined },
-  { path: '/queue', label: '调度队列', icon: UnorderedListOutlined },
-  { path: '/scheduler', label: '调度中心', icon: ControlOutlined },
-  { path: '/history', label: '历史记录', icon: HistoryOutlined },
+  { key: '/home', label: '主页', icon: icon(HomeOutlined) },
+  { key: '/scripts', label: '脚本管理', icon: icon(FileTextOutlined) },
+  { key: '/plans', label: '计划管理', icon: icon(CalendarOutlined) },
+  { key: '/queue', label: '调度队列', icon: icon(UnorderedListOutlined) },
+  { key: '/scheduler', label: '调度中心', icon: icon(ControlOutlined) },
+  { key: '/history', label: '历史记录', icon: icon(HistoryOutlined) },
+]
+const bottomMenuItems = [
+  { key: '/settings', label: '设置', icon: icon(SettingOutlined) },
 ]
 
-const bottomMenuItems = [{ path: '/settings', label: '设置', icon: SettingOutlined }]
+const allItems = [...mainMenuItems, ...bottomMenuItems]
 
-// 自动同步选中项
+// 选中项：根据当前路径前缀匹配
 const selectedKeys = computed(() => {
   const path = route.path
-  const allItems = [...mainMenuItems, ...bottomMenuItems]
-  const matched = allItems.find(item => path.startsWith(item.path))
-  return [matched?.path || '/home']
+  const matched = allItems.find(i => path.startsWith(String(i.key)))
+  return [matched?.key || '/home']
 })
 
-const goTo = (path: string) => {
-  router.push(path)
-}
-
-const toggleCollapse = () => {
-  collapsed.value = !collapsed.value
+const onMenuClick: MenuProps['onClick'] = info => {
+  const target = String(info.key)
+  if (route.path !== target) router.push(target)
 }
 </script>
 
 <style scoped>
-.sider-content {
-  height: 100%;
-  display: flex;
-  flex-direction: column;
-  padding-bottom: 4px; /* 关键：添加3px底部内边距 */
-}
-
-/* 折叠按钮 */
-.collapse-trigger {
-  height: 42px;
+.sider-content { height:100%; display:flex; flex-direction:column; padding:4px 0 8px 0; }
+.sider-content :deep(.ant-menu) { border-inline-end: none !important; background: transparent !important; }
+/* 菜单项外框居中（左右留空），内容左对齐 */
+.sider-content :deep(.ant-menu .ant-menu-item) {
+  color: var(--app-menu-text-color);
+  margin: 2px auto;               /* 水平居中 */
+  width: calc(100% - 16px);       /* 两侧各留 8px 空隙 */
+  border-radius: 6px;
+  padding: 0 10px !important;     /* 左右内边距 */
+  line-height: 36px;
+  height: 36px;
   display: flex;
   align-items: center;
-  justify-content: center;
-  margin: 4px;
-  border-radius: 6px;
-  cursor: pointer;
+  justify-content: flex-start;    /* 左对齐图标与文字 */
+  gap: 6px;
+  transition: background .16s ease, color .16s ease;
+  text-align: left;
+}
+.sider-content :deep(.ant-menu .ant-menu-item .anticon) {
+  color: var(--app-menu-icon-color);
   font-size: 16px;
-  transition: background-color 0.2s;
+  line-height: 1;
+  transition: color .16s ease;
+  margin-right: 0;
 }
-
-.collapse-trigger:hover {
-  background-color: rgba(255, 255, 255, 0.1);
+/* Hover */
+.sider-content :deep(.ant-menu .ant-menu-item:hover) {
+  background: var(--app-menu-item-hover-bg, var(--app-menu-item-hover-bg-hex));
+  color: var(--app-menu-item-hover-text-color);
 }
-
-:deep(.ant-layout-sider-light) .collapse-trigger:hover {
-  background-color: rgba(0, 0, 0, 0.04);
-}
-
-:deep(.ant-layout-sider-dark) .collapse-trigger {
-  color: #fff;
-}
-
-:deep(.ant-layout-sider-light) .collapse-trigger {
-  color: rgba(0, 0, 0, 0.88);
-}
-
-/* 主菜单容器 */
-.main-menu-container {
-  flex: 1;
-  overflow: auto;
-  /* 修复滚动条显示问题 */
-  scrollbar-width: thin;
-  scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
-}
-
-.main-menu-container::-webkit-scrollbar {
-  width: 6px;
-}
-
-.main-menu-container::-webkit-scrollbar-track {
-  background: transparent;
-}
-
-.main-menu-container::-webkit-scrollbar-thumb {
-  background: rgba(0, 0, 0, 0.2);
-  border-radius: 4px;
-}
-
-/* 底部菜单 */
-.bottom-menu {
-  margin-top: auto;
-  border-top: 1px solid rgba(255, 255, 255, 0.08);
-}
-
-:deep(.ant-layout-sider-light .bottom-menu) {
-  border-top: 1px solid rgba(0, 0, 0, 0.04);
-}
-
-/* 菜单项文字 */
-.menu-text {
-  margin-left: 36px;
-  white-space: nowrap;
-  opacity: 1;
-  transition: opacity 0.2s ease;
-}
-
-/* 主题颜色 */
-:deep(.ant-layout-sider-dark) .logo-text,
-:deep(.ant-layout-sider-dark) .menu-text {
-  color: #fff;
-}
-
-:deep(.ant-layout-sider-light) .logo-text,
-:deep(.ant-layout-sider-light) .menu-text {
-  color: rgba(0, 0, 0, 0.88);
-}
-
-/* 菜单项统一样式 */
-:deep(.ant-menu-item),
-:deep(.ant-menu-item-selected) {
-  position: relative;
-  height: 40px;
-  line-height: 34px;
-  margin: 0 6px;
-  border-radius: 6px;
-  padding: 0 !important;
-}
-
-/* 图标绝对定位 */
-:deep(.ant-menu-item .ant-menu-item-icon) {
-  position: absolute;
-  left: 16px;
-  top: 50%;
-  transform: translateY(-50%);
-  width: 20px;
-  height: 20px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  font-size: 18px;
-  pointer-events: none;
-  z-index: 2;
-}
-
-/* 隐藏内容区滚动条 */
-.content-area {
-  scrollbar-width: none;
-  -ms-overflow-style: none;
-}
-
-.content-area::-webkit-scrollbar {
-  display: none;
+.sider-content :deep(.ant-menu .ant-menu-item:hover .anticon) { color: var(--app-menu-item-hover-text-color); }
+/* Selected */
+.sider-content :deep(.ant-menu .ant-menu-item-selected) {
+  background: var(--app-menu-item-selected-bg, var(--app-menu-item-selected-bg-hex));
+  color: var(--app-menu-text-color) !important;
+  font-weight: 500;
 }
+.sider-content :deep(.ant-menu .ant-menu-item-selected .anticon) { color: var(--app-menu-icon-color); }
+.sider-content :deep(.ant-menu-light .ant-menu-item::after),
+.sider-content :deep(.ant-menu-dark .ant-menu-item::after) { display: none; }
+.bottom-menu { margin-top:auto; }
+.content-area { height:100%; overflow:auto; scrollbar-width:none; -ms-overflow-style:none; }
+.content-area::-webkit-scrollbar { display:none; }
 </style>
 
-<!-- 全局样式 -->
-<style>
-/* 收缩状态下，通过 data-title 显示 Tooltip */
-.app-layout-collapsed .ant-menu-inline-collapsed .ant-menu-item:hover::before {
-  content: attr(data-title);
-  position: absolute;
-  left: 60px;
-  top: 50%;
-  transform: translateY(-50%);
-  background: #1890ff;
-  color: #fff;
-  padding: 2px 8px;
-  border-radius: 4px;
-  white-space: nowrap;
-  font-size: 12px;
-  z-index: 1000;
-  opacity: 1;
-  pointer-events: none;
-}
-
-/* 修复底部菜单在折叠状态下的tooltip位置 */
-.app-layout-collapsed .ant-menu-inline-collapsed .bottom-menu .ant-menu-item:hover::before {
-  left: 60px;
-  transform: translateY(-50%);
-}
-
-/* 确保底部菜单在收缩状态下也有3px间距 */
-.app-layout-collapsed .ant-menu-inline-collapsed .bottom-menu {
-  padding-bottom: 6px;
-}
-</style>
+<!-- 调整：外框（菜单项背景块）水平居中，文字与图标左对齐 -->
diff --git a/frontend/src/components/TitleBar.vue b/frontend/src/components/TitleBar.vue
index f898069..05e0af8 100644
--- a/frontend/src/components/TitleBar.vue
+++ b/frontend/src/components/TitleBar.vue
@@ -3,6 +3,8 @@
     <!-- 左侧：Logo和软件名 -->
     <div class="title-bar-left">
       <div class="logo-section">
+        <!-- 新增虚化主题色圆形阴影 -->
+        <span class="logo-glow" aria-hidden="true"></span>
         <img src="@/assets/AUTO-MAS.ico" alt="AUTO-MAS" class="title-logo" />
         <span class="title-text">AUTO-MAS</span>
       </div>
@@ -94,6 +96,7 @@ onMounted(async () => {
   user-select: none;
   position: relative;
   z-index: 1000;
+  overflow: hidden; /* 新增：裁剪超出顶栏的发光 */
 }
 
 .title-bar-dark {
@@ -112,17 +115,42 @@ onMounted(async () => {
   display: flex;
   align-items: center;
   gap: 8px;
+  position: relative; /* 使阴影绝对定位基准 */
+}
+
+/* 新增：主题色虚化圆形阴影 */
+.logo-glow {
+  position: absolute;
+  left: 55px; /* 调整：更贴近图标 */
+  top: 50%;
+  transform: translate(-50%, -50%);
+  width: 200px;  /* 缩小尺寸以适配 32px 高度 */
+  height: 100px;
+  pointer-events: none;
+  border-radius: 50%;
+  background: radial-gradient(circle at 50% 50%, var(--ant-color-primary) 0%, rgba(0,0,0,0) 70%);
+  filter: blur(24px); /* 降低模糊避免越界过多 */
+  opacity: 0.4;
+  z-index: 0;
+}
+.title-bar-dark .logo-glow {
+  opacity: 0.7;
+  filter: blur(24px);
 }
 
 .title-logo {
   width: 20px;
   height: 20px;
+  position: relative;
+  z-index: 1; /* 确保在阴影上方 */
 }
 
 .title-text {
   font-size: 13px;
   font-weight: 600;
   color: #333;
+  position: relative;
+  z-index: 1;
 }
 
 .title-bar-dark .title-text {
diff --git a/frontend/src/composables/useTheme.ts b/frontend/src/composables/useTheme.ts
index 2b73bc2..2f5d796 100644
--- a/frontend/src/composables/useTheme.ts
+++ b/frontend/src/composables/useTheme.ts
@@ -71,15 +71,32 @@ const updateCSSVariables = () => {
   const root = document.documentElement
   const primaryColor = themeColors[themeColor.value]
 
+  // 基础背景（用于估算混合）
+  const baseLightBg = '#ffffff'
+  const baseDarkBg = '#141414'
+  const baseMenuBg = isDark.value ? baseDarkBg : baseLightBg
+
+  // 改进：侧边栏背景使用 HSL 调整而不是简单线性混合，提高在不同主色下的可读性
+  const siderBg = deriveSiderBg(primaryColor, baseMenuBg, isDark.value)
+  const siderBorder = deriveSiderBorder(siderBg, primaryColor, isDark.value)
+
+  // 基础文字候选色
+  const candidateTextLight = 'rgba(255,255,255,0.88)'
+  const candidateTextDark = 'rgba(0,0,0,0.88)'
+
+  // 选菜单文字颜色：对 siderBg 计算对比度，优先满足 >=4.5
+  const menuTextColor = pickAccessibleColor(candidateTextDark, candidateTextLight, siderBg)
+  const iconColor = menuTextColor
+
+  // ===== AntD token 变量（保留） =====
   if (isDark.value) {
-    // 深色模式变量
     root.style.setProperty('--ant-color-primary', primaryColor)
-    root.style.setProperty('--ant-color-primary-hover', lightenColor(primaryColor, 10))
-    root.style.setProperty('--ant-color-primary-bg', `${primaryColor}1a`)
+    root.style.setProperty('--ant-color-primary-hover', hslLighten(primaryColor, 6))
+    root.style.setProperty('--ant-color-primary-bg', addAlpha(primaryColor, 0.10))
     root.style.setProperty('--ant-color-text', 'rgba(255, 255, 255, 0.88)')
     root.style.setProperty('--ant-color-text-secondary', 'rgba(255, 255, 255, 0.65)')
     root.style.setProperty('--ant-color-text-tertiary', 'rgba(255, 255, 255, 0.45)')
-    root.style.setProperty('--ant-color-bg-container', '#141414')
+    root.style.setProperty('--ant-color-bg-container', baseDarkBg)
     root.style.setProperty('--ant-color-bg-layout', '#000000')
     root.style.setProperty('--ant-color-bg-elevated', '#1f1f1f')
     root.style.setProperty('--ant-color-border', '#424242')
@@ -88,14 +105,13 @@ const updateCSSVariables = () => {
     root.style.setProperty('--ant-color-success', '#52c41a')
     root.style.setProperty('--ant-color-warning', '#faad14')
   } else {
-    // 浅色模式变量
     root.style.setProperty('--ant-color-primary', primaryColor)
-    root.style.setProperty('--ant-color-primary-hover', darkenColor(primaryColor, 10))
-    root.style.setProperty('--ant-color-primary-bg', `${primaryColor}1a`)
+    root.style.setProperty('--ant-color-primary-hover', hslDarken(primaryColor, 6))
+    root.style.setProperty('--ant-color-primary-bg', addAlpha(primaryColor, 0.10))
     root.style.setProperty('--ant-color-text', 'rgba(0, 0, 0, 0.88)')
     root.style.setProperty('--ant-color-text-secondary', 'rgba(0, 0, 0, 0.65)')
     root.style.setProperty('--ant-color-text-tertiary', 'rgba(0, 0, 0, 0.45)')
-    root.style.setProperty('--ant-color-bg-container', '#ffffff')
+    root.style.setProperty('--ant-color-bg-container', baseLightBg)
     root.style.setProperty('--ant-color-bg-layout', '#f5f5f5')
     root.style.setProperty('--ant-color-bg-elevated', '#ffffff')
     root.style.setProperty('--ant-color-border', '#d9d9d9')
@@ -104,9 +120,70 @@ const updateCSSVariables = () => {
     root.style.setProperty('--ant-color-success', '#52c41a')
     root.style.setProperty('--ant-color-warning', '#faad14')
   }
+
+  // ===== 自定义菜单配色 =====
+  // 动态 Alpha：根据主色亮度调整透明度以保持区分度
+  const lumPrim = getLuminance(primaryColor)
+  const hoverAlphaBase = isDark.value ? 0.22 : 0.14
+  const selectedAlphaBase = isDark.value ? 0.38 : 0.26
+  const hoverAlpha = clamp01(hoverAlphaBase + (isDark.value ? (lumPrim > 0.65 ? -0.04 : 0) : (lumPrim < 0.30 ? 0.04 : 0)))
+  const selectedAlpha = clamp01(selectedAlphaBase + (isDark.value ? (lumPrim > 0.65 ? -0.05 : 0) : (lumPrim < 0.30 ? 0.05 : 0)))
+
+  // 估算最终选中背景（混合算实际颜色用于对比度计算）
+  const estimatedSelectedBg = blendColors(baseMenuBg, primaryColor, selectedAlpha)
+  const selectedTextColor = pickAccessibleColor('rgba(0,0,0,0.90)', 'rgba(255,255,255,0.92)', estimatedSelectedBg)
+  const hoverTextColor = menuTextColor
+
+  root.style.setProperty('--app-sider-bg', siderBg)
+  root.style.setProperty('--app-sider-border-color', siderBorder)
+  root.style.setProperty('--app-menu-text-color', menuTextColor)
+  root.style.setProperty('--app-menu-icon-color', iconColor)
+  root.style.setProperty('--app-menu-item-hover-text-color', hoverTextColor)
+  root.style.setProperty('--app-menu-item-selected-text-color', selectedTextColor)
+
+  // 背景同时提供 rgba 与 hex alpha（兼容处理）
+  const hoverRgba = hexToRgba(primaryColor, hoverAlpha)
+  const selectedRgba = hexToRgba(primaryColor, selectedAlpha)
+  root.style.setProperty('--app-menu-item-hover-bg', hoverRgba)
+  root.style.setProperty('--app-menu-item-hover-bg-hex', addAlpha(primaryColor, hoverAlpha))
+  root.style.setProperty('--app-menu-item-selected-bg', selectedRgba)
+  root.style.setProperty('--app-menu-item-selected-bg-hex', addAlpha(primaryColor, selectedAlpha))
 }
 
-// 颜色工具函数
+// ===== 新增缺失基础函数（从旧版本恢复） =====
+const addAlpha = (hex: string, alpha: number) => {
+  const a = alpha > 1 ? alpha / 100 : alpha
+  const clamped = Math.min(1, Math.max(0, a))
+  const alphaHex = Math.round(clamped * 255).toString(16).padStart(2, '0')
+  return `${hex}${alphaHex}`
+}
+
+const blendColors = (color1: string, color2: string, ratio: number) => {
+  const r1 = hexToRgb(color1)
+  const r2 = hexToRgb(color2)
+  if (!r1 || !r2) return color1
+  const r = Math.round(r1.r * (1 - ratio) + r2.r * ratio)
+  const g = Math.round(r1.g * (1 - ratio) + r2.g * ratio)
+  const b = Math.round(r1.b * (1 - ratio) + r2.b * ratio)
+  return rgbToHex(r, g, b)
+}
+
+const getLuminance = (hex: string) => {
+  const rgb = hexToRgb(hex)
+  if (!rgb) return 0
+  const transform = (v: number) => {
+    const srgb = v / 255
+    return srgb <= 0.03928 ? srgb / 12.92 : Math.pow((srgb + 0.055) / 1.055, 2.4)
+  }
+  const r = transform(rgb.r)
+  const g = transform(rgb.g)
+  const b = transform(rgb.b)
+  return 0.2126 * r + 0.7152 * g + 0.0722 * b
+}
+
+// ===== 新增/改进的颜色工具 =====
+const clamp01 = (v: number) => Math.min(1, Math.max(0, v))
+
 const hexToRgb = (hex: string) => {
   const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)
   return result
@@ -122,24 +199,105 @@ const rgbToHex = (r: number, g: number, b: number) => {
   return '#' + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1)
 }
 
-const lightenColor = (hex: string, percent: number) => {
+// 新增：hex -> rgba 字符串
+const hexToRgba = (hex: string, alpha: number) => {
   const rgb = hexToRgb(hex)
-  if (!rgb) return hex
-
-  const { r, g, b } = rgb
-  const amount = Math.round(2.55 * percent)
-
-  return rgbToHex(Math.min(255, r + amount), Math.min(255, g + amount), Math.min(255, b + amount))
+  if (!rgb) return 'rgba(0,0,0,0)'
+  const a = alpha > 1 ? alpha / 100 : alpha
+  return `rgba(${rgb.r},${rgb.g},${rgb.b},${clamp01(a)})`
 }
 
-const darkenColor = (hex: string, percent: number) => {
+// HSL 转换（感知更平滑）
+const rgbToHsl = (r: number, g: number, b: number) => {
+  r /= 255; g /= 255; b /= 255
+  const max = Math.max(r, g, b), min = Math.min(r, g, b)
+  let h = 0, s = 0
+  const l = (max + min) / 2
+  const d = max - min
+  if (d !== 0) {
+    s = l > 0.5 ? d / (2 - max - min) : d / (max + min)
+    switch (max) {
+      case r: h = (g - b) / d + (g < b ? 6 : 0); break
+      case g: h = (b - r) / d + 2; break
+      case b: h = (r - g) / d + 4; break
+    }
+    h /= 6
+  }
+  return { h: h * 360, s, l }
+}
+
+const hslToRgb = (h: number, s: number, l: number) => {
+  h /= 360
+  if (s === 0) {
+    const val = Math.round(l * 255)
+    return { r: val, g: val, b: val }
+  }
+  const hue2rgb = (p: number, q: number, t: number) => {
+    if (t < 0) t += 1
+    if (t > 1) t -= 1
+    if (t < 1/6) return p + (q - p) * 6 * t
+    if (t < 1/2) return q
+    if (t < 2/3) return p + (q - p) * (2/3 - t) * 6
+    return p
+  }
+  const q = l < 0.5 ? l * (1 + s) : l + s - l * s
+  const p = 2 * l - q
+  const r = hue2rgb(p, q, h + 1/3)
+  const g = hue2rgb(p, q, h)
+  const b = hue2rgb(p, q, h - 1/3)
+  return { r: Math.round(r * 255), g: Math.round(g * 255), b: Math.round(b * 255) }
+}
+
+const hslAdjust = (hex: string, dl: number) => {
   const rgb = hexToRgb(hex)
   if (!rgb) return hex
+  const { h, s, l } = rgbToHsl(rgb.r, rgb.g, rgb.b)
+  const nl = clamp01(l + dl)
+  const nrgb = hslToRgb(h, s, nl)
+  return rgbToHex(nrgb.r, nrgb.g, nrgb.b)
+}
 
-  const { r, g, b } = rgb
-  const amount = Math.round(2.55 * percent)
+const hslLighten = (hex: string, percent: number) => hslAdjust(hex, percent/100)
+const hslDarken = (hex: string, percent: number) => hslAdjust(hex, -percent/100)
 
-  return rgbToHex(Math.max(0, r - amount), Math.max(0, g - amount), Math.max(0, b - amount))
+// 对比度 (WCAG)
+const contrastRatio = (hex1: string, hex2: string) => {
+  const L1 = getLuminance(hex1)
+  const L2 = getLuminance(hex2)
+  const light = Math.max(L1, L2)
+  const dark = Math.min(L1, L2)
+  return (light + 0.05) / (dark + 0.05)
+}
+
+const rgbaExtractHex = (color: string) => {
+  // 只支持 hex(#rrggbb) 直接返回；若 rgba 则忽略 alpha 并合成背景为黑假设
+  if (color.startsWith('#') && (color.length === 7)) return color
+  // 简化：返回黑或白占位
+  return '#000000'
+}
+
+const pickAccessibleColor = (c1: string, c2: string, bg: string, minRatio = 4.5) => {
+  const hexBg = rgbaExtractHex(bg)
+  const hex1 = rgbaExtractHex(c1 === 'rgba(255,255,255,0.88)' ? '#ffffff' : (c1.includes('255,255,255') ? '#ffffff' : '#000000'))
+  const hex2 = rgbaExtractHex(c2 === 'rgba(255,255,255,0.88)' ? '#ffffff' : (c2.includes('255,255,255') ? '#ffffff' : '#000000'))
+  const r1 = contrastRatio(hex1, hexBg)
+  const r2 = contrastRatio(hex2, hexBg)
+  // 优先满足 >= minRatio；都满足取更高；否则取更高
+  if (r1 >= minRatio && r2 >= minRatio) return r1 >= r2 ? c1 : c2
+  if (r1 >= minRatio) return c1
+  if (r2 >= minRatio) return c2
+  return r1 >= r2 ? c1 : c2
+}
+
+// 改进侧栏背景：如果深色模式，降低亮度并略增饱和；浅色模式提高亮度轻度染色
+const deriveSiderBg = (primary: string, base: string, dark: boolean) => {
+  const mixRatio = dark ? 0.22 : 0.18
+  const mixed = blendColors(base, primary, mixRatio)
+  return dark ? hslDarken(mixed, 8) : hslLighten(mixed, 6)
+}
+
+const deriveSiderBorder = (siderBg: string, primary: string, dark: boolean) => {
+  return dark ? blendColors(siderBg, primary, 0.30) : blendColors('#d9d9d9', primary, 0.25)
 }
 
 // 监听系统主题变化