RS6 修复移动响应式布局体系

client/src/components/mobile/MobileBottomNav.tsx

@@ -34,7 +34,7 @@ export function MobileBottomNav() {
 
   return (
     <nav
-      className="pointer-events-auto fixed inset-x-0 bottom-0 z-[70] min-h-[calc(var(--mobile-bottom-nav-height,64px)+env(safe-area-inset-bottom,0px))] transform-gpu border-t border-zinc-200 bg-white/95 px-2 pb-[calc(0.35rem+env(safe-area-inset-bottom,0px))] pt-1.5 shadow-[0_-6px_18px_rgba(15,23,42,0.08)] backdrop-blur md:hidden"
+      className="mobile-bottom-nav-surface pointer-events-auto fixed inset-x-0 bottom-0 z-[70] transform-gpu border-t border-zinc-200 bg-white/95 shadow-[0_-6px_18px_rgba(15,23,42,0.08)] backdrop-blur md:hidden"
       data-testid="mobile-bottom-nav"
     >
       <div className="relative z-[71] grid grid-cols-4 gap-1">