修改完成

tests/n01-module-baseline-contract.ps1

@@ -29,4 +29,17 @@ if ($source.Contains('application-status-card.png')) {
   throw 'N01 must not reuse the genealogy application card'
 }
 
+if ($source -match '<image\s+(?:[^>]*\s)?class="notice-(?:card|state-card)__skin"') {
+  throw 'N01 decorative frames must be container backgrounds instead of positioned image layers'
+}
+if ($source -match 'position\s*:') {
+  throw 'N01 must keep ordinary content in document flow'
+}
+foreach ($background in @(
+  'background: url("/static/assets/modules/notification/transparent/n01-notice-card.png") center / 100% 100% no-repeat',
+  'background: url("/static/assets/modules/notification/transparent/n01-notice-card.png") top center / 100% 220rpx no-repeat'
+)) {
+  if (-not $source.Contains($background)) { throw "N01 missing document-flow background: $background" }
+}
+
 Write-Output 'N01-MODULE-BASELINE-CONTRACT PASS'