diff --git a/graphify-out/manifest.json b/graphify-out/manifest.json
index 68e2f27..e2060c0 100644
--- a/graphify-out/manifest.json
+++ b/graphify-out/manifest.json
@@ -2020,8 +2020,8 @@
     "semantic_hash": ""
   },
   "h5/test/splash-brand-browser.mjs": {
-    "mtime": 1791894154.8087292,
-    "ast_hash": "f0927d459653a70bb8fbc668fa066dad",
+    "mtime": 1791901607.7048087,
+    "ast_hash": "1ae44d528f227ea038a27d13fca81c75",
     "semantic_hash": ""
   },
   "docs/\u62cd\u6444\u89d2\u5ea6\u4e0d\u5408\u683c\u9707\u52a8\u63d0\u9192-2026-10-13.md": {
diff --git a/h5/css/ui-20261012.css b/h5/css/ui-20261012.css
index 766e16e..8c070ab 100644
--- a/h5/css/ui-20261012.css
+++ b/h5/css/ui-20261012.css
@@ -9,9 +9,10 @@
   top: max(6.838833%, calc(env(safe-area-inset-top) + 48px));
 }
 #s-splash .splash-slogan { top: max(6.838833%, calc(env(safe-area-inset-top) + 48px)); }
-/* Keep the PSD Chinese line; both English lines share the exact regular font. */
+/* Keep the PSD Chinese line; compensate the lowercase brand's smaller x-height. */
 .splash-slogan-updated .splash-slogan-copy { width:100%; height:100%; clip-path:inset(68% 0 0); }
 .splash-slogan-brand, .splash-slogan-english { position:absolute; top:0; left:50%; transform:translateX(-50%); font-family:Arial,sans-serif; font-size:23px; font-weight:400; line-height:1; white-space:nowrap; }
+.splash-slogan-brand { top:-4px; font-size:28px; }
 .splash-slogan-english { top:26.736111px; }
 #s-splash [data-action="open-privacy"],
 #s-splash [data-action="open-privacy"]:focus,
diff --git a/h5/test/splash-brand-browser.mjs b/h5/test/splash-brand-browser.mjs
index fdad47c..92802c9 100644
--- a/h5/test/splash-brand-browser.mjs
+++ b/h5/test/splash-brand-browser.mjs
@@ -27,9 +27,11 @@ try {
         return [s.fontFamily, s.fontSize, s.fontWeight, s.lineHeight];
       });
     });
-    assert.deepEqual(fonts[0], fonts[1], root + ': identical English font settings');
-    assert.equal(fonts[0][1], '23px');
+    assert.equal(fonts[0][0], fonts[1][0], root + ': same font family');
+    assert.equal(fonts[0][1], '28px', 'lowercase brand has optical size compensation');
+    assert.equal(fonts[1][1], '23px', 'English tagline remains unchanged');
     assert.equal(fonts[0][2], '400');
+    assert.equal(fonts[1][2], '400');
     assert.match(await page.locator(root + ' .splash-slogan').getAttribute('aria-label'), /^1'me/);
   }
   const button = page.locator('#s-splash [data-action="open-privacy"]');