Update app.py

app.py

@@ -221,8 +221,8 @@ intro_css = """
    INTRODUCTION BLOCK  (font, size, alignment)
    -------------------------------------------------- */
 .introduction-wrapper, .introduction-section {
-    font-family: Georgia, serif;
-    font-size: 1.6rem !important;  /* ≈22–23 px */
+    font-family: Arial;
+    font-size: 1.8rem !important;  /* ≈22–23 px */
     line-height: 1.75;
     color: #344054;
     text-align: center;
@@ -230,11 +230,12 @@ intro_css = """
     margin: 0 auto 3rem auto;
 }
 .introduction-wrapper p, .introduction-section p {
+    font-size: 1.8rem !important;  /* ≈22–23 px */
     margin-bottom: 1rem;
 }
 @media (max-width: 768px) {
     .introduction-wrapper, .introduction-section {
-        font-size: 1.2rem !important;
+        font-size: 1.6rem !important;
     }
 }
 """