style(home): 恢复英雄区顶部柔彩 pastel 背景(粉/蓝/紫光晕自顶向下渐隐，仿 portrait)

website/src/styles/home.css

@@ -3,6 +3,15 @@
    布局：hero 方型马赛克 / 悬浮窗口 / 淡色tint分栏 / 居中早鸟 / icon拼贴带 / 三步卡 / 定价卡 / 双列FAQ
    ============================================================ */
 .page-marketing { position: relative; z-index: 1; min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }
+/* 英雄区顶部柔彩 pastel bg（粉/蓝/紫光晕，渐隐向下，仿 portrait） */
+.page-marketing::before {
+  content: ''; position: absolute; top: 0; left: 0; right: 0; height: min(100vh, 1180px); z-index: -1; pointer-events: none;
+  background:
+    radial-gradient(52% 42% at 18% 6%, rgba(255,168,205,.34), transparent 62%),
+    radial-gradient(50% 40% at 82% 4%, rgba(150,198,255,.36), transparent 62%),
+    radial-gradient(52% 40% at 50% 0%, rgba(205,176,255,.30), transparent 62%),
+    radial-gradient(96% 44% at 50% 20%, rgba(255,255,255,.55), transparent 70%);
+}
 .pt-wrap { flex: 1; width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 24px; }
 
 /* ---------- Hero ---------- */