diff --git a/dashboard/src/lib/theme/palette.ts b/dashboard/src/lib/theme/palette.ts
new file mode 100644
index 00000000..e55f61e0
--- /dev/null
+++ b/dashboard/src/lib/theme/palette.ts
@@ -0,0 +1,203 @@
+import type { ColorTokens } from './tokens'
+
+type HSL = {
+  h: number
+  s: number
+  l: number
+}
+
+const clamp = (value: number, min: number, max: number): number => {
+  if (value < min) return min
+  if (value > max) return max
+  return value
+}
+
+const roundToTenth = (value: number): number => Math.round(value * 10) / 10
+
+const wrapHue = (value: number): number => ((value % 360) + 360) % 360
+
+export const parseHSL = (hslStr: string): HSL => {
+  const cleaned = hslStr
+    .trim()
+    .replace(/^hsl\(/i, '')
+    .replace(/\)$/i, '')
+    .replace(/,/g, ' ')
+  const parts = cleaned.split(/\s+/).filter(Boolean)
+  const rawH = parts[0] ?? '0'
+  const rawS = parts[1] ?? '0%'
+  const rawL = parts[2] ?? '0%'
+
+  const h = Number.parseFloat(rawH)
+  const s = Number.parseFloat(rawS.replace('%', ''))
+  const l = Number.parseFloat(rawL.replace('%', ''))
+
+  return {
+    h: Number.isNaN(h) ? 0 : h,
+    s: Number.isNaN(s) ? 0 : s,
+    l: Number.isNaN(l) ? 0 : l,
+  }
+}
+
+export const formatHSL = (h: number, s: number, l: number): string => {
+  const safeH = roundToTenth(wrapHue(h))
+  const safeS = roundToTenth(clamp(s, 0, 100))
+  const safeL = roundToTenth(clamp(l, 0, 100))
+  return `${safeH} ${safeS}% ${safeL}%`
+}
+
+export const hexToHSL = (hex: string): string => {
+  let cleaned = hex.trim().replace('#', '')
+  if (cleaned.length === 3) {
+    cleaned = cleaned
+      .split('')
+      .map((char) => `${char}${char}`)
+      .join('')
+  }
+
+  if (cleaned.length !== 6) {
+    return formatHSL(0, 0, 0)
+  }
+
+  const r = Number.parseInt(cleaned.slice(0, 2), 16) / 255
+  const g = Number.parseInt(cleaned.slice(2, 4), 16) / 255
+  const b = Number.parseInt(cleaned.slice(4, 6), 16) / 255
+
+  const max = Math.max(r, g, b)
+  const min = Math.min(r, g, b)
+  const delta = max - min
+  const l = (max + min) / 2
+
+  let h = 0
+  let s = 0
+
+  if (delta !== 0) {
+    s = l > 0.5 ? delta / (2 - max - min) : delta / (max + min)
+    switch (max) {
+      case r:
+        h = (g - b) / delta + (g < b ? 6 : 0)
+        break
+      case g:
+        h = (b - r) / delta + 2
+        break
+      case b:
+        h = (r - g) / delta + 4
+        break
+      default:
+        break
+    }
+    h *= 60
+  }
+
+  return formatHSL(h, s * 100, l * 100)
+}
+
+export const adjustLightness = (hsl: string, amount: number): string => {
+  const { h, s, l } = parseHSL(hsl)
+  return formatHSL(h, s, l + amount)
+}
+
+export const adjustSaturation = (hsl: string, amount: number): string => {
+  const { h, s, l } = parseHSL(hsl)
+  return formatHSL(h, s + amount, l)
+}
+
+export const rotateHue = (hsl: string, degrees: number): string => {
+  const { h, s, l } = parseHSL(hsl)
+  return formatHSL(h + degrees, s, l)
+}
+
+const setLightness = (hsl: string, lightness: number): string => {
+  const { h, s } = parseHSL(hsl)
+  return formatHSL(h, s, lightness)
+}
+
+const setSaturation = (hsl: string, saturation: number): string => {
+  const { h, l } = parseHSL(hsl)
+  return formatHSL(h, saturation, l)
+}
+
+const getReadableForeground = (hsl: string): string => {
+  const { h, s, l } = parseHSL(hsl)
+  const neutralSaturation = clamp(s * 0.15, 6, 20)
+  return l > 60
+    ? formatHSL(h, neutralSaturation, 10)
+    : formatHSL(h, neutralSaturation, 96)
+}
+
+export const generatePalette = (accentHSL: string, isDark: boolean): ColorTokens => {
+  const accent = parseHSL(accentHSL)
+  const primary = formatHSL(accent.h, accent.s, accent.l)
+
+  const background = isDark ? '222.2 84% 4.9%' : '0 0% 100%'
+  const foreground = isDark ? '210 40% 98%' : '222.2 84% 4.9%'
+
+  const secondary = formatHSL(
+    accent.h,
+    clamp(accent.s * 0.35, 8, 40),
+    isDark ? 17.5 : 96,
+  )
+
+  const muted = formatHSL(
+    accent.h,
+    clamp(accent.s * 0.12, 2, 18),
+    isDark ? 17.5 : 96,
+  )
+
+  const accentVariant = formatHSL(
+    accent.h + 35,
+    clamp(accent.s * 0.6, 20, 85),
+    isDark ? clamp(accent.l * 0.6 + 8, 25, 60) : clamp(accent.l * 0.8 + 14, 40, 75),
+  )
+
+  const destructive = formatHSL(
+    0,
+    clamp(accent.s, 60, 90),
+    isDark ? 30.6 : 60.2,
+  )
+
+  const border = formatHSL(
+    accent.h,
+    clamp(accent.s * 0.2, 5, 25),
+    isDark ? 17.5 : 91.4,
+  )
+
+  const mutedForeground = setSaturation(
+    setLightness(muted, isDark ? 65.1 : 46.9),
+    clamp(accent.s * 0.2, 10, 30),
+  )
+
+  const chartBase = formatHSL(accent.h, accent.s, accent.l)
+  const chartSteps = [0, 72, 144, 216, 288]
+  const charts = chartSteps.map((step) => rotateHue(chartBase, step))
+
+  const card = adjustLightness(background, isDark ? 2 : -1)
+  const popover = adjustLightness(background, isDark ? 3 : -0.5)
+
+  return {
+    primary,
+    'primary-foreground': getReadableForeground(primary),
+    'primary-gradient': 'none',
+    secondary,
+    'secondary-foreground': getReadableForeground(secondary),
+    muted,
+    'muted-foreground': mutedForeground,
+    accent: accentVariant,
+    'accent-foreground': getReadableForeground(accentVariant),
+    destructive,
+    'destructive-foreground': getReadableForeground(destructive),
+    background,
+    foreground,
+    card,
+    'card-foreground': foreground,
+    popover,
+    'popover-foreground': foreground,
+    border,
+    input: border,
+    ring: primary,
+    'chart-1': charts[0],
+    'chart-2': charts[1],
+    'chart-3': charts[2],
+    'chart-4': charts[3],
+    'chart-5': charts[4],
+  }
+}
diff --git a/dashboard/src/lib/theme/sanitizer.ts b/dashboard/src/lib/theme/sanitizer.ts
new file mode 100644
index 00000000..de425b38
--- /dev/null
+++ b/dashboard/src/lib/theme/sanitizer.ts
@@ -0,0 +1,111 @@
+/**
+ * CSS 安全过滤器 - 用于过滤用户自定义 CSS 中的危险内容
+ * 防范外部资源加载和 XSS 注入
+ */
+
+interface SanitizeResult {
+  css: string
+  warnings: string[]
+}
+
+/**
+ * 过滤规则：基于正则表达式的危险模式检测
+ * 与匹配的危险模式相关的警告消息
+ */
+interface FilterRule {
+  pattern: RegExp
+  message: string
+}
+
+/**
+ * 定义所有过滤规则
+ */
+const filterRules: FilterRule[] = [
+  {
+    pattern: /@import\s+(?:url\()?['"]?(?:https?:|\/\/)?[^)'"]+['"]?\)?[;]?/gi,
+    message: '移除 @import 语句（禁止加载外部资源）',
+  },
+  {
+    pattern: /url\s*\(\s*(?:https?:|\/\/|data:|javascript:)[^)]*\)/gi,
+    message: '移除 url() 调用（禁止外部请求）',
+  },
+  {
+    pattern: /javascript:/gi,
+    message: '移除 javascript: 协议（XSS 防护）',
+  },
+  {
+    pattern: /expression\s*\(\s*[^)]*\)/gi,
+    message: '移除 expression() 函数（IE 遗留 XSS 向量）',
+  },
+  {
+    pattern: /-moz-binding\s*:\s*[^;]+/gi,
+    message: '移除 -moz-binding 属性（Firefox XSS 向量）',
+  },
+  {
+    pattern: /behavior\s*:\s*[^;]+/gi,
+    message: '移除 behavior: 属性（IE HTC）',
+  },
+]
+
+/**
+ * 将原始 CSS 按行分割并跟踪行号
+ */
+function splitCSSByLines(css: string): string[] {
+  return css.split(/\r?\n/)
+}
+
+/**
+ * 在 CSS 中查找模式匹配的行号
+ */
+function findMatchingLineNumbers(css: string, pattern: RegExp): number[] {
+  const lines = splitCSSByLines(css)
+  const matchingLines: number[] = []
+
+  lines.forEach((line, index) => {
+    if (pattern.test(line)) {
+      matchingLines.push(index + 1) // 行号从 1 开始
+    }
+  })
+
+  return matchingLines
+}
+
+/**
+ * 过滤 CSS 中的危险内容
+ * @param rawCSS 原始 CSS 字符串
+ * @returns 包含过滤后的 CSS 和警告列表的对象
+ */
+export function sanitizeCSS(rawCSS: string): SanitizeResult {
+  let sanitizedCSS = rawCSS
+  const warnings: string[] = []
+
+  // 应用所有过滤规则
+  filterRules.forEach((rule) => {
+    const lineNumbers = findMatchingLineNumbers(sanitizedCSS, rule.pattern)
+
+    // 对每个匹配的行生成警告
+    lineNumbers.forEach((lineNum) => {
+      warnings.push(`Line ${lineNum}: ${rule.message}`)
+    })
+
+    // 从 CSS 中移除匹配内容
+    sanitizedCSS = sanitizedCSS.replace(rule.pattern, '')
+  })
+
+  // 清理多余的空白行
+  sanitizedCSS = sanitizedCSS.replace(/\n\s*\n/g, '\n').trim()
+
+  return {
+    css: sanitizedCSS,
+    warnings,
+  }
+}
+
+/**
+ * 快速检查 CSS 是否包含危险模式
+ * @param css CSS 字符串
+ * @returns 如果包含危险模式返回 true，否则返回 false
+ */
+export function isCSSSafe(css: string): boolean {
+  return !filterRules.some((rule) => rule.pattern.test(css))
+}
diff --git a/dashboard/src/lib/theme/storage.ts b/dashboard/src/lib/theme/storage.ts
new file mode 100644
index 00000000..63ea4d6a
--- /dev/null
+++ b/dashboard/src/lib/theme/storage.ts
@@ -0,0 +1,205 @@
+/**
+ * 主题配置的 localStorage 存储管理模块
+ * 统一处理主题相关的存储操作，包括加载、保存、导出、导入和迁移旧 key
+ */
+
+import type { UserThemeConfig } from './tokens'
+
+/**
+ * 主题存储 key 定义
+ * 统一使用 'maibot-theme-*' 前缀，替代现有的 'ui-theme'、'maibot-ui-theme' 和 'accent-color'
+ */
+export const THEME_STORAGE_KEYS = {
+  MODE: 'maibot-theme-mode',
+  PRESET: 'maibot-theme-preset',
+  ACCENT: 'maibot-theme-accent',
+  OVERRIDES: 'maibot-theme-overrides',
+  CUSTOM_CSS: 'maibot-theme-custom-css',
+} as const
+
+/**
+ * 默认主题配置
+ */
+const DEFAULT_THEME_CONFIG: UserThemeConfig = {
+  selectedPreset: 'light',
+  accentColor: 'blue',
+  tokenOverrides: {},
+  customCSS: '',
+}
+
+/**
+ * 从 localStorage 加载完整主题配置
+ * 缺失值使用合理默认值
+ *
+ * @returns 加载的主题配置对象
+ */
+export function loadThemeConfig(): UserThemeConfig {
+  const preset = localStorage.getItem(THEME_STORAGE_KEYS.PRESET)
+  const accent = localStorage.getItem(THEME_STORAGE_KEYS.ACCENT)
+  const overridesStr = localStorage.getItem(THEME_STORAGE_KEYS.OVERRIDES)
+  const customCSS = localStorage.getItem(THEME_STORAGE_KEYS.CUSTOM_CSS)
+
+  // 解析 tokenOverrides JSON
+  let tokenOverrides = {}
+  if (overridesStr) {
+    try {
+      tokenOverrides = JSON.parse(overridesStr)
+    } catch {
+      // JSON 解析失败，使用空对象
+      tokenOverrides = {}
+    }
+  }
+
+  return {
+    selectedPreset: preset || DEFAULT_THEME_CONFIG.selectedPreset,
+    accentColor: accent || DEFAULT_THEME_CONFIG.accentColor,
+    tokenOverrides,
+    customCSS: customCSS || DEFAULT_THEME_CONFIG.customCSS,
+  }
+}
+
+/**
+ * 保存完整主题配置到 localStorage
+ *
+ * @param config - 要保存的主题配置
+ */
+export function saveThemeConfig(config: UserThemeConfig): void {
+  localStorage.setItem(THEME_STORAGE_KEYS.PRESET, config.selectedPreset)
+  localStorage.setItem(THEME_STORAGE_KEYS.ACCENT, config.accentColor)
+  localStorage.setItem(THEME_STORAGE_KEYS.OVERRIDES, JSON.stringify(config.tokenOverrides))
+  localStorage.setItem(THEME_STORAGE_KEYS.CUSTOM_CSS, config.customCSS)
+}
+
+/**
+ * 部分更新主题配置
+ * 先加载现有配置，合并部分更新，再保存
+ *
+ * @param partial - 部分主题配置更新
+ */
+export function saveThemePartial(partial: Partial<UserThemeConfig>): void {
+  const current = loadThemeConfig()
+  const updated: UserThemeConfig = {
+    ...current,
+    ...partial,
+  }
+  saveThemeConfig(updated)
+}
+
+/**
+ * 导出主题配置为美化格式的 JSON 字符串
+ *
+ * @returns 格式化的 JSON 字符串
+ */
+export function exportThemeJSON(): string {
+  const config = loadThemeConfig()
+  return JSON.stringify(config, null, 2)
+}
+
+/**
+ * 从 JSON 字符串导入主题配置
+ * 包含基础的格式和字段校验
+ *
+ * @param json - JSON 字符串
+ * @returns 导入结果，包含成功状态和错误列表
+ */
+export function importThemeJSON(
+  json: string,
+): { success: boolean; errors: string[] } {
+  const errors: string[] = []
+
+  // JSON 格式校验
+  let config: unknown
+  try {
+    config = JSON.parse(json)
+  } catch (error) {
+    return {
+      success: false,
+      errors: [`Invalid JSON format: ${error instanceof Error ? error.message : 'Unknown error'}`],
+    }
+  }
+
+  // 基本对象类型校验
+  if (typeof config !== 'object' || config === null) {
+    return {
+      success: false,
+      errors: ['Configuration must be a JSON object'],
+    }
+  }
+
+  const configObj = config as Record<string, unknown>
+
+  // 必要字段存在性校验
+  if (typeof configObj.selectedPreset !== 'string') {
+    errors.push('selectedPreset must be a string')
+  }
+  if (typeof configObj.accentColor !== 'string') {
+    errors.push('accentColor must be a string')
+  }
+  if (typeof configObj.customCSS !== 'string') {
+    errors.push('customCSS must be a string')
+  }
+  if (configObj.tokenOverrides !== undefined && typeof configObj.tokenOverrides !== 'object') {
+    errors.push('tokenOverrides must be an object')
+  }
+
+  if (errors.length > 0) {
+    return { success: false, errors }
+  }
+
+  // 校验通过，保存配置
+  const validConfig: UserThemeConfig = {
+    selectedPreset: configObj.selectedPreset as string,
+    accentColor: configObj.accentColor as string,
+    tokenOverrides: (configObj.tokenOverrides as Partial<any>) || {},
+    customCSS: configObj.customCSS as string,
+  }
+
+  saveThemeConfig(validConfig)
+  return { success: true, errors: [] }
+}
+
+/**
+ * 重置主题配置为默认值
+ * 删除所有 THEME_STORAGE_KEYS 对应的 localStorage 项
+ */
+export function resetThemeToDefault(): void {
+  Object.values(THEME_STORAGE_KEYS).forEach((key) => {
+    localStorage.removeItem(key)
+  })
+}
+
+/**
+ * 迁移旧的 localStorage key 到新 key
+ * 处理：
+ * - 'ui-theme' 或 'maibot-ui-theme' → 'maibot-theme-mode'
+ * - 'accent-color' → 'maibot-theme-accent'
+ * 迁移完成后删除旧 key，避免重复迁移
+ */
+export function migrateOldKeys(): void {
+  // 迁移主题模式
+  // 优先使用 'ui-theme'（因为 ThemeProvider 默认使用它）
+  const uiTheme = localStorage.getItem('ui-theme')
+  const maiTheme = localStorage.getItem('maibot-ui-theme')
+  const newMode = localStorage.getItem(THEME_STORAGE_KEYS.MODE)
+
+  if (!newMode) {
+    if (uiTheme) {
+      localStorage.setItem(THEME_STORAGE_KEYS.MODE, uiTheme)
+    } else if (maiTheme) {
+      localStorage.setItem(THEME_STORAGE_KEYS.MODE, maiTheme)
+    }
+  }
+
+  // 迁移强调色
+  const accentColor = localStorage.getItem('accent-color')
+  const newAccent = localStorage.getItem(THEME_STORAGE_KEYS.ACCENT)
+
+  if (accentColor && !newAccent) {
+    localStorage.setItem(THEME_STORAGE_KEYS.ACCENT, accentColor)
+  }
+
+  // 删除旧 key
+  localStorage.removeItem('ui-theme')
+  localStorage.removeItem('maibot-ui-theme')
+  localStorage.removeItem('accent-color')
+}
diff --git a/dashboard/src/lib/theme/tokens.ts b/dashboard/src/lib/theme/tokens.ts
new file mode 100644
index 00000000..cded85dd
--- /dev/null
+++ b/dashboard/src/lib/theme/tokens.ts
@@ -0,0 +1,353 @@
+/**
+ * Design Token Schema 定义
+ * 集中管理所有设计令牌（颜色、排版、间距、阴影、动画等）
+ */
+
+// ============================================================================
+// Color Tokens 类型定义
+// ============================================================================
+
+export type ColorTokens = {
+  primary: string
+  'primary-foreground': string
+  'primary-gradient': string
+  secondary: string
+  'secondary-foreground': string
+  muted: string
+  'muted-foreground': string
+  accent: string
+  'accent-foreground': string
+  destructive: string
+  'destructive-foreground': string
+  background: string
+  foreground: string
+  card: string
+  'card-foreground': string
+  popover: string
+  'popover-foreground': string
+  border: string
+  input: string
+  ring: string
+  'chart-1': string
+  'chart-2': string
+  'chart-3': string
+  'chart-4': string
+  'chart-5': string
+}
+
+// ============================================================================
+// Typography Tokens 类型定义
+// ============================================================================
+
+export type TypographyTokens = {
+  'font-family-base': string
+  'font-family-code': string
+  'font-size-xs': string
+  'font-size-sm': string
+  'font-size-base': string
+  'font-size-lg': string
+  'font-size-xl': string
+  'font-size-2xl': string
+  'font-weight-normal': number
+  'font-weight-medium': number
+  'font-weight-semibold': number
+  'font-weight-bold': number
+  'line-height-tight': number
+  'line-height-normal': number
+  'line-height-relaxed': number
+  'letter-spacing-tight': string
+  'letter-spacing-normal': string
+  'letter-spacing-wide': string
+}
+
+// ============================================================================
+// Visual Tokens 类型定义
+// ============================================================================
+
+export type VisualTokens = {
+  'radius-sm': string
+  'radius-md': string
+  'radius-lg': string
+  'radius-xl': string
+  'radius-full': string
+  'shadow-sm': string
+  'shadow-md': string
+  'shadow-lg': string
+  'shadow-xl': string
+  'blur-sm': string
+  'blur-md': string
+  'blur-lg': string
+  'opacity-disabled': number
+  'opacity-hover': number
+  'opacity-overlay': number
+}
+
+// ============================================================================
+// Layout Tokens 类型定义
+// ============================================================================
+
+export type LayoutTokens = {
+  'space-unit': string
+  'space-xs': string
+  'space-sm': string
+  'space-md': string
+  'space-lg': string
+  'space-xl': string
+  'space-2xl': string
+  'sidebar-width': string
+  'header-height': string
+  'max-content-width': string
+}
+
+// ============================================================================
+// Animation Tokens 类型定义
+// ============================================================================
+
+export type AnimationTokens = {
+  'anim-duration-fast': string
+  'anim-duration-normal': string
+  'anim-duration-slow': string
+  'anim-easing-default': string
+  'anim-easing-in': string
+  'anim-easing-out': string
+  'anim-easing-in-out': string
+  'transition-colors': string
+  'transition-transform': string
+  'transition-opacity': string
+}
+
+// ============================================================================
+// Aggregated Theme Tokens
+// ============================================================================
+
+export type ThemeTokens = {
+  color: ColorTokens
+  typography: TypographyTokens
+  visual: VisualTokens
+  layout: LayoutTokens
+  animation: AnimationTokens
+}
+
+// ============================================================================
+// Theme Preset & Config Types
+// ============================================================================
+
+export type ThemePreset = {
+  id: string
+  name: string
+  description: string
+  tokens: ThemeTokens
+  isDark: boolean
+}
+
+export type UserThemeConfig = {
+  selectedPreset: string
+  accentColor: string
+  tokenOverrides: Partial<ThemeTokens>
+  customCSS: string
+}
+
+// ============================================================================
+// Default Light Tokens (from index.css :root)
+// ============================================================================
+
+export const defaultLightTokens: ThemeTokens = {
+  color: {
+    primary: '221.2 83.2% 53.3%',
+    'primary-foreground': '210 40% 98%',
+    'primary-gradient': 'none',
+    secondary: '210 40% 96.1%',
+    'secondary-foreground': '222.2 47.4% 11.2%',
+    muted: '210 40% 96.1%',
+    'muted-foreground': '215.4 16.3% 46.9%',
+    accent: '210 40% 96.1%',
+    'accent-foreground': '222.2 47.4% 11.2%',
+    destructive: '0 84.2% 60.2%',
+    'destructive-foreground': '210 40% 98%',
+    background: '0 0% 100%',
+    foreground: '222.2 84% 4.9%',
+    card: '0 0% 100%',
+    'card-foreground': '222.2 84% 4.9%',
+    popover: '0 0% 100%',
+    'popover-foreground': '222.2 84% 4.9%',
+    border: '214.3 31.8% 91.4%',
+    input: '214.3 31.8% 91.4%',
+    ring: '221.2 83.2% 53.3%',
+    'chart-1': '221.2 83.2% 53.3%',
+    'chart-2': '160 60% 45%',
+    'chart-3': '30 80% 55%',
+    'chart-4': '280 65% 60%',
+    'chart-5': '340 75% 55%',
+  },
+  typography: {
+    'font-family-base': '-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif',
+    'font-family-code': '"JetBrains Mono", "Monaco", "Courier New", monospace',
+    'font-size-xs': '0.75rem',
+    'font-size-sm': '0.875rem',
+    'font-size-base': '1rem',
+    'font-size-lg': '1.125rem',
+    'font-size-xl': '1.25rem',
+    'font-size-2xl': '1.5rem',
+    'font-weight-normal': 400,
+    'font-weight-medium': 500,
+    'font-weight-semibold': 600,
+    'font-weight-bold': 700,
+    'line-height-tight': 1.2,
+    'line-height-normal': 1.5,
+    'line-height-relaxed': 1.75,
+    'letter-spacing-tight': '-0.02em',
+    'letter-spacing-normal': '0em',
+    'letter-spacing-wide': '0.02em',
+  },
+  visual: {
+    'radius-sm': '0.25rem',
+    'radius-md': '0.375rem',
+    'radius-lg': '0.5rem',
+    'radius-xl': '0.75rem',
+    'radius-full': '9999px',
+    'shadow-sm': '0 1px 2px 0 rgba(0, 0, 0, 0.05)',
+    'shadow-md': '0 4px 6px -1px rgba(0, 0, 0, 0.1)',
+    'shadow-lg': '0 10px 15px -3px rgba(0, 0, 0, 0.1)',
+    'shadow-xl': '0 20px 25px -5px rgba(0, 0, 0, 0.1)',
+    'blur-sm': '4px',
+    'blur-md': '12px',
+    'blur-lg': '24px',
+    'opacity-disabled': 0.5,
+    'opacity-hover': 0.8,
+    'opacity-overlay': 0.75,
+  },
+  layout: {
+    'space-unit': '0.25rem',
+    'space-xs': '0.5rem',
+    'space-sm': '0.75rem',
+    'space-md': '1rem',
+    'space-lg': '1.5rem',
+    'space-xl': '2rem',
+    'space-2xl': '3rem',
+    'sidebar-width': '16rem',
+    'header-height': '3.5rem',
+    'max-content-width': '1280px',
+  },
+  animation: {
+    'anim-duration-fast': '150ms',
+    'anim-duration-normal': '300ms',
+    'anim-duration-slow': '500ms',
+    'anim-easing-default': 'cubic-bezier(0.4, 0, 0.2, 1)',
+    'anim-easing-in': 'cubic-bezier(0.4, 0, 1, 1)',
+    'anim-easing-out': 'cubic-bezier(0, 0, 0.2, 1)',
+    'anim-easing-in-out': 'cubic-bezier(0.4, 0, 0.2, 1)',
+    'transition-colors': 'color 300ms cubic-bezier(0.4, 0, 0.2, 1)',
+    'transition-transform': 'transform 300ms cubic-bezier(0.4, 0, 0.2, 1)',
+    'transition-opacity': 'opacity 300ms cubic-bezier(0.4, 0, 0.2, 1)',
+  },
+}
+
+// ============================================================================
+// Default Dark Tokens (from index.css .dark)
+// ============================================================================
+
+export const defaultDarkTokens: ThemeTokens = {
+  color: {
+    primary: '217.2 91.2% 59.8%',
+    'primary-foreground': '210 40% 98%',
+    'primary-gradient': 'none',
+    secondary: '217.2 32.6% 17.5%',
+    'secondary-foreground': '210 40% 98%',
+    muted: '217.2 32.6% 17.5%',
+    'muted-foreground': '215 20.2% 65.1%',
+    accent: '217.2 32.6% 17.5%',
+    'accent-foreground': '210 40% 98%',
+    destructive: '0 62.8% 30.6%',
+    'destructive-foreground': '210 40% 98%',
+    background: '222.2 84% 4.9%',
+    foreground: '210 40% 98%',
+    card: '222.2 84% 4.9%',
+    'card-foreground': '210 40% 98%',
+    popover: '222.2 84% 4.9%',
+    'popover-foreground': '210 40% 98%',
+    border: '217.2 32.6% 17.5%',
+    input: '217.2 32.6% 17.5%',
+    ring: '224.3 76.3% 48%',
+    'chart-1': '217.2 91.2% 59.8%',
+    'chart-2': '160 60% 50%',
+    'chart-3': '30 80% 60%',
+    'chart-4': '280 65% 65%',
+    'chart-5': '340 75% 60%',
+  },
+  typography: {
+    'font-family-base': '-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif',
+    'font-family-code': '"JetBrains Mono", "Monaco", "Courier New", monospace',
+    'font-size-xs': '0.75rem',
+    'font-size-sm': '0.875rem',
+    'font-size-base': '1rem',
+    'font-size-lg': '1.125rem',
+    'font-size-xl': '1.25rem',
+    'font-size-2xl': '1.5rem',
+    'font-weight-normal': 400,
+    'font-weight-medium': 500,
+    'font-weight-semibold': 600,
+    'font-weight-bold': 700,
+    'line-height-tight': 1.2,
+    'line-height-normal': 1.5,
+    'line-height-relaxed': 1.75,
+    'letter-spacing-tight': '-0.02em',
+    'letter-spacing-normal': '0em',
+    'letter-spacing-wide': '0.02em',
+  },
+  visual: {
+    'radius-sm': '0.25rem',
+    'radius-md': '0.375rem',
+    'radius-lg': '0.5rem',
+    'radius-xl': '0.75rem',
+    'radius-full': '9999px',
+    'shadow-sm': '0 1px 2px 0 rgba(0, 0, 0, 0.25)',
+    'shadow-md': '0 4px 6px -1px rgba(0, 0, 0, 0.3)',
+    'shadow-lg': '0 10px 15px -3px rgba(0, 0, 0, 0.4)',
+    'shadow-xl': '0 20px 25px -5px rgba(0, 0, 0, 0.5)',
+    'blur-sm': '4px',
+    'blur-md': '12px',
+    'blur-lg': '24px',
+    'opacity-disabled': 0.5,
+    'opacity-hover': 0.8,
+    'opacity-overlay': 0.75,
+  },
+  layout: {
+    'space-unit': '0.25rem',
+    'space-xs': '0.5rem',
+    'space-sm': '0.75rem',
+    'space-md': '1rem',
+    'space-lg': '1.5rem',
+    'space-xl': '2rem',
+    'space-2xl': '3rem',
+    'sidebar-width': '16rem',
+    'header-height': '3.5rem',
+    'max-content-width': '1280px',
+  },
+  animation: {
+    'anim-duration-fast': '150ms',
+    'anim-duration-normal': '300ms',
+    'anim-duration-slow': '500ms',
+    'anim-easing-default': 'cubic-bezier(0.4, 0, 0.2, 1)',
+    'anim-easing-in': 'cubic-bezier(0.4, 0, 1, 1)',
+    'anim-easing-out': 'cubic-bezier(0, 0, 0.2, 1)',
+    'anim-easing-in-out': 'cubic-bezier(0.4, 0, 0.2, 1)',
+    'transition-colors': 'color 300ms cubic-bezier(0.4, 0, 0.2, 1)',
+    'transition-transform': 'transform 300ms cubic-bezier(0.4, 0, 0.2, 1)',
+    'transition-opacity': 'opacity 300ms cubic-bezier(0.4, 0, 0.2, 1)',
+  },
+}
+
+// ============================================================================
+// Token Utility Functions
+// ============================================================================
+
+/**
+ * 将 Token 类别和 key 转换为 CSS 变量名
+ * @example tokenToCSSVarName('color', 'primary') => '--color-primary'
+ */
+export function tokenToCSSVarName(
+  category: keyof ThemeTokens | 'color' | 'typography' | 'visual' | 'layout' | 'animation',
+  key: string,
+): string {
+  return `--${category}-${key}`
+}