diff --git a/.changeset/dark-lemons-invite.md b/.changeset/dark-lemons-invite.md
new file mode 100644
index 0000000000..69d26e04d3
--- /dev/null
+++ b/.changeset/dark-lemons-invite.md
@@ -0,0 +1,5 @@
+---
+"shadcn": patch
+---
+
+fix fallback style resolving issue
diff --git a/packages/shadcn/src/utils/get-config.ts b/packages/shadcn/src/utils/get-config.ts
index 9e7784ab70..45b5cdfd5d 100644
--- a/packages/shadcn/src/utils/get-config.ts
+++ b/packages/shadcn/src/utils/get-config.ts
@@ -213,7 +213,17 @@ export function findCommonRoot(cwd: string, resolvedPath: string) {
 // TODO: Cache this call.
 export async function getTargetStyleFromConfig(cwd: string, fallback: string) {
   const projectInfo = await getProjectInfo(cwd)
-  return projectInfo?.tailwindVersion === "v4" ? "new-york-v4" : fallback
+
+  // Only override legacy v3 style names for Tailwind v4 projects.
+  // Preserve v4 style names like "base-nova", "radix-nova", etc.
+  if (
+    projectInfo?.tailwindVersion === "v4" &&
+    (!fallback || fallback === "new-york" || fallback === "default")
+  ) {
+    return "new-york-v4"
+  }
+
+  return fallback
 }
 
 export function getBase(style: string | undefined) {