fix: widen sec-sub max-width from 500px to 680px

Author: Patel230

docs/style.css

@@ -545,7 +545,7 @@ nav {
 .sec-sub {
   font-size: 0.95rem;
   color: var(--text);
-  max-width: 500px;
+  max-width: 680px;
   line-height: 1.75;
   margin-bottom: 3rem;
 }