diff --git a/tests/routes/hicad-manufacturing-extension.test.ts b/tests/routes/hicad-manufacturing-extension.test.ts
index 35b960e22..50f30e080 100644
--- a/tests/routes/hicad-manufacturing-extension.test.ts
+++ b/tests/routes/hicad-manufacturing-extension.test.ts
@@ -379,6 +379,10 @@ test.describe('HiCAD manufacturing extension', () => {
     expect(html).toContain('由壹点AI')
     expect(html).toContain('/api/favicon?surface=hicad')
     expect(html).toContain('@page { size: A3 landscape;')
+    expect(html).toContain(
+      'grid-template-columns: minmax(180px, 1fr) minmax(0, 2fr) minmax(180px, 1fr)'
+    )
+    expect(html).toContain('h1 { overflow: hidden; margin: 0; font-size: 18px;')
   })
 
   test('renders the engineering sheet without horizontal clipping', async ({
diff --git a/vendor/zoo-modeling-app/manufacturing.ts b/vendor/zoo-modeling-app/manufacturing.ts
index 1994f9fb3..4fbd35482 100644
--- a/vendor/zoo-modeling-app/manufacturing.ts
+++ b/vendor/zoo-modeling-app/manufacturing.ts
@@ -934,15 +934,16 @@ export function createEngineeringSheetHtml(input: EngineeringSheetInput) {
     @page { size: A3 landscape; margin: 12mm; }
     * { box-sizing: border-box; }
     body { margin: 0; color: #111827; font-family: Arial, "Microsoft YaHei", sans-serif; }
-    header { display: flex; align-items: end; justify-content: space-between; gap: 24px; border-bottom: 2px solid #111827; padding-bottom: 8px; }
-    .brand { display: flex; align-items: center; gap: 10px; min-width: 170px; }
-    .brand-logo { width: 38px; height: 38px; object-fit: contain; }
-    .brand-name { font-size: 18px; font-weight: 700; white-space: nowrap; }
-    .title { flex: 1; }
-    h1 { margin: 0; font-size: 24px; }
+    header { display: grid; grid-template-columns: minmax(180px, 1fr) minmax(0, 2fr) minmax(180px, 1fr); align-items: center; gap: 20px; min-height: 52px; border-bottom: 2px solid #111827; padding: 5px 0 7px; }
+    .brand { display: flex; align-items: center; gap: 8px; min-width: 0; }
+    .brand-logo { width: 30px; height: 30px; object-fit: contain; }
+    .brand-name { overflow: hidden; font-size: 15px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
+    .title { min-width: 0; text-align: center; }
+    .title p { margin-top: 2px; color: #4b5563; font-size: 11px; line-height: 1.25; }
+    h1 { overflow: hidden; margin: 0; font-size: 18px; line-height: 1.25; text-overflow: ellipsis; white-space: nowrap; }
     h2 { margin: 0 0 8px; font-size: 16px; }
     p { margin: 4px 0; }
-    .meta { color: #4b5563; font-size: 12px; text-align: right; }
+    .meta { color: #4b5563; font-size: 10px; line-height: 1.45; text-align: right; white-space: nowrap; }
     .sheet-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 16px; margin-top: 14px; }
     section { break-inside: avoid; }
     .snapshot-wrap { position: relative; }