diff --git a/apps/desktop/src/pages/SettingsPage.tsx b/apps/desktop/src/pages/SettingsPage.tsx
index dfa1c4b..09960d3 100644
--- a/apps/desktop/src/pages/SettingsPage.tsx
+++ b/apps/desktop/src/pages/SettingsPage.tsx
@@ -1310,9 +1310,13 @@ function Section({
 
 // Sub-heading inside a Section — used to chunk dense sections like Voice into
 // smaller named groups (Audio-Gerät / Qualität / PTT / Hotkeys / E2EE).
+// No border: `--color-line` is already a semi-transparent token, and applying
+// the `/60` opacity modifier brightens it (Tailwind overrides the original
+// alpha) which made the sub-cards look harsher than the outer Section. Plain
+// background tint + caps heading carry the grouping signal on their own.
 function SubSection({ title, children }: { title: string; children: React.ReactNode }) {
   return (
-    <div className="space-y-2 rounded-xl border border-line/60 bg-surface-3/40 p-4">
+    <div className="space-y-2 rounded-xl bg-surface-3/50 p-4">
       <h3 className="text-[11px] font-semibold uppercase tracking-[0.1em] text-fg-muted">
         {title}
       </h3>