refactor: merge code and update main.css, delete file css in component

app/components/contact/DepartmentCardEmpty.tsx

@@ -0,0 +1,16 @@
+export default function DepartmentCardEmpty() {
+  return (
+    <div className="bg-gray-50 rounded-[16px] p-8 border border-gray-200 border-dashed flex flex-col items-center justify-center text-center h-full">
+      <div className="w-16 h-16 bg-white rounded-full flex items-center justify-center text-gray-400 text-2xl mb-4 shadow-sm">
+        <i className="fas fa-circle-question"></i>
+      </div>
+      <div className="contact-card-title font-bold text-gray-700 mb-2">Not sure who to contact?</div>
+      <p className="text-sm text-gray-500 mb-6">
+        Use our general inquiry form below and we'll route your message to the appropriate department.
+      </p>
+      <a href="#inquiry-form-section" className="text-primary font-medium text-sm hover:underline flex items-center gap-2">
+        Go to Form <i className="fas fa-arrow-down"></i>
+      </a>
+    </div>
+  );
+}