diff --git a/oAI/Services/ConversationExportService.swift b/oAI/Services/ConversationExportService.swift
index 8cbd32a..9213984 100644
--- a/oAI/Services/ConversationExportService.swift
+++ b/oAI/Services/ConversationExportService.swift
@@ -73,16 +73,19 @@ enum ConversationExportService {
     html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
     ::-webkit-scrollbar { display: none; }
     body { font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif; \
-    font-size: 15px; color: #1a1a1a; background: #ffffff; max-width: 820px; margin: 40px auto; \
+    font-size: 14px; color: #1a1a1a; background: #ffffff; max-width: 820px; margin: 40px auto; \
     padding: 0 24px; line-height: 1.5; }
-    h1 { font-size: 24px; border-bottom: 1px solid #ddd; padding-bottom: 12px; }
+    h1 { font-size: 22px; border-bottom: 1px solid #ddd; padding-bottom: 12px; }
     .message { margin: 20px 0; padding: 12px 16px; border-radius: 8px; border-left: 4px solid transparent; }
     .message.user { background: #f5f7fa; border-left-color: #4a90d9; }
     .message.assistant { background: #fafafa; border-left-color: #8a8a8a; }
-    .role { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; \
+    .role { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; \
     color: #666; margin-bottom: 8px; }
     .message p { margin: 8px 0; }
-    .message h1, .message h2, .message h3, .message h4, .message h5, .message h6 { margin: 12px 0 6px; }
+    .message h1 { font-size: 19px; margin: 12px 0 6px; }
+    .message h2 { font-size: 17px; margin: 12px 0 6px; }
+    .message h3 { font-size: 15.5px; margin: 12px 0 6px; }
+    .message h4, .message h5, .message h6 { font-size: 14px; margin: 12px 0 6px; }
     .message ul, .message ol { margin: 8px 0; padding-left: 24px; }
     .message blockquote { margin: 8px 0; padding: 4px 12px; border-left: 3px solid #ccc; color: #555; }
     .message code { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 0.9em; \