diff --git a/vite-frontend/docs/shadcn-ui-full-migration-2026-02-19.md b/vite-frontend/docs/shadcn-ui-full-migration-2026-02-19.md
index c0d5be9..897ed55 100644
--- a/vite-frontend/docs/shadcn-ui-full-migration-2026-02-19.md
+++ b/vite-frontend/docs/shadcn-ui-full-migration-2026-02-19.md
@@ -47,3 +47,6 @@
 - [2026-02-19] 完成 S8：构建验收通过（`npm run build`），`package.json` 已无 `heroui/nextui` 依赖
 - [2026-02-19] 验证结果：业务代码中 `@heroui/*` 导入为 `0`，已统一替换为 `@/shadcn-bridge/heroui/*`（22 文件，106 处）
 - [2026-02-19] 后续修复：`src/components/ui/button.tsx` 与 `src/shadcn-bridge/heroui/button.tsx` 改为 `forwardRef`，消除 `DropdownMenuTrigger asChild` 场景 ref 警告；复构建通过
+- [2026-02-19] 回归修复：定位“按钮边框/颜色丢失”根因是 Tailwind v4 下语义色未生成；新增 `src/styles/tailwind-theme.pcss`（由 `src/styles/globals.css` 引入）承载 `@theme inline` token 映射，恢复 `bg-primary`/`text-foreground`/`border-input` 等语义类输出
+- [2026-02-19] 回归修复：增强 `src/shadcn-bridge/heroui/button.tsx` 的 `solid/light/flat/bordered/shadow` 颜色映射，并修正 `src/components/ui/button.tsx` 的 `outline/ghost` hover 语义类，避免依赖未定义的 `accent` 色
+- [2026-02-19] 复验结果：`npm run build` 通过；编译产物已包含关键语义类；页面级视觉回归（forward/tunnel/node/user）通过（后端未启动时仅保留 `ERR_CONNECTION_REFUSED` 噪音）
diff --git a/vite-frontend/src/components/ui/button.tsx b/vite-frontend/src/components/ui/button.tsx
index 72fd09f..ba4ffb7 100644
--- a/vite-frontend/src/components/ui/button.tsx
+++ b/vite-frontend/src/components/ui/button.tsx
@@ -11,9 +11,9 @@ const buttonVariants = cva(
       variant: {
         default: "bg-primary text-primary-foreground hover:bg-primary/90",
         destructive: "bg-danger text-white hover:bg-danger/90",
-        outline: "border border-input bg-background hover:bg-accent hover:text-accent-foreground",
+        outline: "border border-input bg-background hover:bg-default-100 hover:text-foreground dark:hover:bg-default-200/40",
         secondary: "bg-secondary text-secondary-foreground hover:bg-secondary/80",
-        ghost: "hover:bg-accent hover:text-accent-foreground",
+        ghost: "hover:bg-default-100 hover:text-foreground dark:hover:bg-default-200/40",
         link: "text-primary underline-offset-4 hover:underline",
         light: "bg-transparent hover:bg-default-100 dark:hover:bg-default-200/40",
         flat: "bg-default-100 text-foreground hover:bg-default-200 dark:bg-default-100/40",
diff --git a/vite-frontend/src/shadcn-bridge/heroui/button.tsx b/vite-frontend/src/shadcn-bridge/heroui/button.tsx
index 14d9b86..0d7de47 100644
--- a/vite-frontend/src/shadcn-bridge/heroui/button.tsx
+++ b/vite-frontend/src/shadcn-bridge/heroui/button.tsx
@@ -57,6 +57,79 @@ function mapSize(size: HeroButtonSize, isIconOnly: boolean): "default" | "sm" |
   return "default";
 }
 
+const solidColorClassMap: Partial<Record<HeroButtonColor, string>> = {
+  default:
+    "bg-default-200 text-default-800 hover:bg-default-300 dark:bg-default-100 dark:text-default-800 dark:hover:bg-default-200",
+  success: "bg-success text-white hover:bg-success-600",
+  warning: "bg-warning text-warning-900 hover:bg-warning-400",
+};
+
+const borderedColorClassMap: Record<HeroButtonColor, string> = {
+  default:
+    "border-default-300 text-default-700 hover:bg-default-100 dark:border-default-300 dark:text-default-600 dark:hover:bg-default-200/40",
+  primary: "border-primary text-primary hover:bg-primary-50 dark:border-primary-500/60 dark:text-primary-300 dark:hover:bg-primary-900/20",
+  secondary:
+    "border-secondary text-secondary hover:bg-secondary-50 dark:border-secondary-500/60 dark:text-secondary-300 dark:hover:bg-secondary-900/20",
+  success: "border-success text-success hover:bg-success-50 dark:border-success-500/60 dark:text-success-300 dark:hover:bg-success-900/20",
+  warning:
+    "border-warning text-warning-700 hover:bg-warning-50 dark:border-warning-500/60 dark:text-warning-300 dark:hover:bg-warning-900/20",
+  danger: "border-danger text-danger hover:bg-danger-50 dark:border-danger-500/60 dark:text-danger-300 dark:hover:bg-danger-900/20",
+};
+
+const lightColorClassMap: Record<HeroButtonColor, string> = {
+  default: "text-default-700 hover:bg-default-100 dark:text-default-600 dark:hover:bg-default-200/40",
+  primary: "text-primary hover:bg-primary-100/70 dark:text-primary-300 dark:hover:bg-primary-900/30",
+  secondary: "text-secondary hover:bg-secondary-100/70 dark:text-secondary-300 dark:hover:bg-secondary-900/30",
+  success: "text-success hover:bg-success-100/70 dark:text-success-300 dark:hover:bg-success-900/30",
+  warning: "text-warning-700 hover:bg-warning-100/70 dark:text-warning-300 dark:hover:bg-warning-900/30",
+  danger: "text-danger hover:bg-danger-100/70 dark:text-danger-300 dark:hover:bg-danger-900/30",
+};
+
+const flatColorClassMap: Record<HeroButtonColor, string> = {
+  default:
+    "bg-default-100 text-default-700 hover:bg-default-200 dark:bg-default-100/45 dark:text-default-700 dark:hover:bg-default-200/60",
+  primary: "bg-primary-100 text-primary-700 hover:bg-primary-200 dark:bg-primary-900/30 dark:text-primary-300 dark:hover:bg-primary-900/45",
+  secondary:
+    "bg-secondary-100 text-secondary-700 hover:bg-secondary-200 dark:bg-secondary-900/30 dark:text-secondary-300 dark:hover:bg-secondary-900/45",
+  success: "bg-success-100 text-success-700 hover:bg-success-200 dark:bg-success-900/30 dark:text-success-300 dark:hover:bg-success-900/45",
+  warning: "bg-warning-100 text-warning-700 hover:bg-warning-200 dark:bg-warning-900/30 dark:text-warning-300 dark:hover:bg-warning-900/45",
+  danger: "bg-danger-100 text-danger-700 hover:bg-danger-200 dark:bg-danger-900/30 dark:text-danger-300 dark:hover:bg-danger-900/45",
+};
+
+const shadowColorClassMap: Record<HeroButtonColor, string> = {
+  default: "shadow-md shadow-default-400/40",
+  primary: "shadow-md shadow-primary-500/35",
+  secondary: "shadow-md shadow-secondary-500/35",
+  success: "shadow-md shadow-success-500/35",
+  warning: "shadow-md shadow-warning-500/40",
+  danger: "shadow-md shadow-danger-500/35",
+};
+
+function mapColorClass(color: HeroButtonColor, variant: HeroButtonVariant): string {
+  if (variant === "bordered") {
+    return borderedColorClassMap[color];
+  }
+  if (variant === "light") {
+    return lightColorClassMap[color];
+  }
+  if (variant === "flat") {
+    return flatColorClassMap[color];
+  }
+  if (variant === "solid" || variant === "shadow") {
+    return solidColorClassMap[color] ?? "";
+  }
+
+  return "";
+}
+
+function mapShadowClass(color: HeroButtonColor, variant: HeroButtonVariant): string {
+  if (variant !== "shadow") {
+    return "";
+  }
+
+  return shadowColorClassMap[color];
+}
+
 export const Button = React.forwardRef<
   HTMLButtonElement,
   ButtonProps & {
@@ -86,6 +159,8 @@ export const Button = React.forwardRef<
     const resolvedVariant = mapVariant(color, variant);
     const resolvedSize = mapSize(size, isIconOnly);
     const resolvedDisabled = Boolean(disabled || isDisabled || isLoading);
+    const resolvedColorClass = mapColorClass(color, variant);
+    const resolvedShadowClass = mapShadowClass(color, variant);
 
     const handleClick = (event: React.MouseEvent<HTMLButtonElement>) => {
       onClick?.(event);
@@ -94,7 +169,7 @@ export const Button = React.forwardRef<
 
     return (
       <BaseButton
-        className={cn(isIconOnly ? "p-0" : "", className)}
+        className={cn(isIconOnly ? "p-0" : "", resolvedColorClass, resolvedShadowClass, className)}
         disabled={resolvedDisabled}
         ref={ref}
         size={resolvedSize}
diff --git a/vite-frontend/src/styles/globals.css b/vite-frontend/src/styles/globals.css
index 87915ea..fe6d7c1 100644
--- a/vite-frontend/src/styles/globals.css
+++ b/vite-frontend/src/styles/globals.css
@@ -1,5 +1,6 @@
 @import "tailwindcss";
 @import "tw-animate-css";
+@import "./tailwind-theme.pcss";
 
 :root {
   --safe-area-top: env(safe-area-inset-top, 0px);
diff --git a/vite-frontend/src/styles/tailwind-theme.pcss b/vite-frontend/src/styles/tailwind-theme.pcss
new file mode 100644
index 0000000..ccaf8ce
--- /dev/null
+++ b/vite-frontend/src/styles/tailwind-theme.pcss
@@ -0,0 +1,82 @@
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --color-border: var(--border);
+  --color-input: var(--input);
+  --color-ring: var(--ring);
+  --color-content1: var(--content1);
+  --color-divider: var(--divider);
+
+  --color-default-50: var(--default-50);
+  --color-default-100: var(--default-100);
+  --color-default-200: var(--default-200);
+  --color-default-300: var(--default-300);
+  --color-default-400: var(--default-400);
+  --color-default-500: var(--default-500);
+  --color-default-600: var(--default-600);
+  --color-default-700: var(--default-700);
+  --color-default-800: var(--default-800);
+  --color-default-900: var(--default-900);
+
+  --color-primary: var(--primary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-primary-50: var(--primary-50);
+  --color-primary-100: var(--primary-100);
+  --color-primary-200: var(--primary-200);
+  --color-primary-300: var(--primary-300);
+  --color-primary-400: var(--primary-400);
+  --color-primary-500: var(--primary-500);
+  --color-primary-600: var(--primary-600);
+  --color-primary-700: var(--primary-700);
+  --color-primary-800: var(--primary-800);
+  --color-primary-900: var(--primary-900);
+
+  --color-secondary: var(--secondary);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-secondary-50: var(--secondary-50);
+  --color-secondary-100: var(--secondary-100);
+  --color-secondary-200: var(--secondary-200);
+  --color-secondary-300: var(--secondary-300);
+  --color-secondary-400: var(--secondary-400);
+  --color-secondary-500: var(--secondary-500);
+  --color-secondary-600: var(--secondary-600);
+  --color-secondary-700: var(--secondary-700);
+  --color-secondary-800: var(--secondary-800);
+  --color-secondary-900: var(--secondary-900);
+
+  --color-danger: var(--danger);
+  --color-danger-50: var(--danger-50);
+  --color-danger-100: var(--danger-100);
+  --color-danger-200: var(--danger-200);
+  --color-danger-300: var(--danger-300);
+  --color-danger-400: var(--danger-400);
+  --color-danger-500: var(--danger-500);
+  --color-danger-600: var(--danger-600);
+  --color-danger-700: var(--danger-700);
+  --color-danger-800: var(--danger-800);
+  --color-danger-900: var(--danger-900);
+
+  --color-success: var(--success);
+  --color-success-50: var(--success-50);
+  --color-success-100: var(--success-100);
+  --color-success-200: var(--success-200);
+  --color-success-300: var(--success-300);
+  --color-success-400: var(--success-400);
+  --color-success-500: var(--success-500);
+  --color-success-600: var(--success-600);
+  --color-success-700: var(--success-700);
+  --color-success-800: var(--success-800);
+  --color-success-900: var(--success-900);
+
+  --color-warning: var(--warning);
+  --color-warning-50: var(--warning-50);
+  --color-warning-100: var(--warning-100);
+  --color-warning-200: var(--warning-200);
+  --color-warning-300: var(--warning-300);
+  --color-warning-400: var(--warning-400);
+  --color-warning-500: var(--warning-500);
+  --color-warning-600: var(--warning-600);
+  --color-warning-700: var(--warning-700);
+  --color-warning-800: var(--warning-800);
+  --color-warning-900: var(--warning-900);
+}