udpate

assets/css/special-offer-50.css

@@ -1,4 +1,9 @@
 /* Special Offer 50% — from temp/优惠页 (Figma export) */
+@import url("aifo-page-bg.css");
+
+#special-offer-50.aifo-page-bg {
+  margin-top: 0;
+}
 
 #special-offer-50 {
   --so-bg: #080808;
@@ -14,24 +19,11 @@
   --so-btn-px: 28px;
   --so-btn-font-size: 0.95rem;
   --so-btn-radius: 8px;
+  --aifo-page-bg-top-left-top: 97px;
   color: var(--so-text);
   position: relative;
 }
 
-#special-offer-50::before {
-  content: "";
-  position: absolute;
-  top: 106px;
-  left: -2vw;
-  width: min(60vw, 555px);
-  height: min(60vw, 555px);
-  max-height: min(52vh, 485px);
-  z-index: 1;
-  pointer-events: none;
-  background: url("../images/backgrounds/new-user-promo-corner-glow.png") no-repeat
-    left top / cover;
-}
-
 #special-offer-50 .so-container {
   width: 100%;
   max-width: var(--so-container);
@@ -370,10 +362,10 @@
     grid-area: hero-note;
   }
 
-  #special-offer-50::before {
-    padding-top: 72px;
-    top: 72px
+  #special-offer-50 {
+    --aifo-page-bg-top-left-top: 72px;
   }
+
   #special-offer-50 .so-hero {
     padding: 0;
     min-height: 0;