Fix missing gap between hero and first FAQ category heading

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: congwang-mk

assets/css/faq.css

@@ -73,9 +73,6 @@
     letter-spacing: -0.01em;
 }
 
-.faq-category:first-of-type {
-    margin-top: 0;
-}
 
 .faq-content i {
     width: 18px;