diff --git a/site/index.html b/site/index.html
index 330a60f..0f24afa 100644
--- a/site/index.html
+++ b/site/index.html
@@ -74,7 +74,7 @@
 
     .hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 200px 0 140px; text-align: center; }
     .hero .hero-content { width: 100%; max-width: var(--feature-max); margin: 0 auto; padding: 0 96px; }
-    .hero .app-icon { width: 80px; height: 80px; border-radius: 18px; margin: 0 auto 40px; display: block; }
+    .hero .app-icon { width: 864px; height: 864px; border-radius: 36px; margin: 0 auto 40px; display: block; }
     .hero h1 { font-size: 96px; font-weight: 900; letter-spacing: -0.04em; line-height: 1.05; max-width: 900px; margin: 0 auto 32px; }
     .hero h1 .accent { color: var(--accent); }
     .hero p { font-size: 22px; color: var(--text-secondary); max-width: 640px; line-height: 1.7; margin: 0 auto 56px; }
@@ -168,7 +168,7 @@
       nav .nav-links a { padding: 8px 16px; font-size: 14px; }
       .hero h1 { font-size: 44px; }
       .hero p { font-size: 18px; }
-      .hero .app-icon { width: 64px; height: 64px; }
+      .hero .app-icon { width: 240px; height: 240px; border-radius: 24px; }
       .section-title { font-size: 34px; }
       section { padding: 100px 0; }
       section.chapter { padding: 140px 0; }