diff --git a/public/frontend/event-site.html b/public/frontend/event-site.html
index 8aa685f..c175464 100644
--- a/public/frontend/event-site.html
+++ b/public/frontend/event-site.html
@@ -48,13 +48,13 @@
       --ease: cubic-bezier(.2,.8,.2,1);
       --font-sans: "Event Heiti", sans-serif;
       --font-serif: "Event Songti", serif;
-      --font-small: var(--font-sans);
+      --font-small: var(--font-serif);
       --font-small-size: 14px;
-      --font-en: var(--font-sans);
+      --font-en: var(--font-serif);
     }
     * { box-sizing: border-box; }
     html { width: 100%; min-height: 100%; overflow-x: hidden; scroll-behavior: smooth; }
-    body { margin: 0; width: 100%; min-width: 320px; min-height: 100%; overflow-x: hidden; color: var(--ink); background: #071526; font-family: var(--font-sans); font-weight: 400; -webkit-font-smoothing: antialiased; }
+    body { margin: 0; width: 100%; min-width: 320px; min-height: 100%; overflow-x: hidden; color: var(--ink); background: #071526; font-family: var(--font-serif); font-weight: 400; -webkit-font-smoothing: antialiased; }
     a { color: inherit; text-decoration: none; }
     .wrap { width: var(--wrap); margin: 0 auto; }
     .site-header { position: absolute; inset: 0 0 auto; z-index: 20; color: #fff; background: transparent; }
@@ -5376,10 +5376,10 @@
       white-space: nowrap !important;
     }
 
-    /* 五大标题宋体略加粗；最小字宋体 Regular；其余黑体 Regular */
+    /* 默认宋体；五大标题略加粗；指定卡片/阶段标题黑体不加粗 */
     body,
     body * {
-      font-family: var(--font-sans) !important;
+      font-family: var(--font-serif) !important;
       font-weight: 400 !important;
       font-synthesis: none;
     }
@@ -5393,26 +5393,15 @@
       font-weight: 600 !important;
       font-synthesis: weight;
     }
-    .nav,
-    .nav a,
-    .language-switch,
-    .hero-organizers,
-    .hero-organizers dt,
-    .hero-organizers dd,
-    .hero-org-row,
-    .matched-section-label,
-    .audience-kicker,
-    .audience-eyebrow,
-    .tracks-kicker,
-    .roadmap-intro strong,
-    .step-place,
-    .roadmap .step-place,
-    .award-card small,
-    .awards .award-card small,
-    .footer-brand,
-    .footer-meta,
-    [lang="en"] {
-      font-family: var(--font-serif) !important;
+    .audience-tracks-layout .audience-stage strong,
+    .audience-tracks-layout .audience-stage .stage-sub,
+    .audience-tracks-layout .audience-type strong,
+    .tracks-summary strong,
+    .audience-tracks-layout .tracks .track-card h3,
+    .roadmap .step h3,
+    .roadmap .step p strong,
+    .awards .award-card h3 {
+      font-family: var(--font-sans) !important;
       font-weight: 400 !important;
     }