Support ultrawide layout with equal columns and taiji branding.

Use 50/50 mode workspace columns, widen content to 1920px on fish screens, replace header logo with taiji icon, and add full-page taiji backdrop.

Co-authored-by: Cursor <cursoragent@cursor.com>

components/footer.tsx

@@ -1,9 +1,12 @@
 import React from "react";
 import { VERSION } from "@/lib/constant";
+import { APP_CONTAINER } from "@/lib/layout";
 
 function Footer() {
   return (
-    <footer className="mx-auto flex items-center gap-1 text-xs text-muted-foreground/80">
+    <footer
+      className={`${APP_CONTAINER} relative z-10 flex items-center justify-center gap-1 py-4 text-xs text-muted-foreground/80`}
+    >
       <span className="italic">心诚则灵</span>
       <span className="text-muted-foreground/60">·</span>
       <span>知命阁 v{VERSION}</span>

components/header.tsx

@@ -1,8 +1,9 @@
 "use client";
 import Link from "next/link";
 import { usePathname } from "next/navigation";
-import { ChatGPT } from "@/components/svg";
+import { TaijiIcon } from "@/components/svg/taiji";
 import { ModeToggle } from "@/components/mode-toggle";
+import { APP_CONTAINER } from "@/lib/layout";
 
 const NAV_ITEMS = [
   { href: "/learn", label: "易经学习" },
@@ -34,11 +35,11 @@ function NavLink({ href, label }: { href: string; label: string }) {
 
 export default function Header() {
   return (
-    <header className="border-b border-border/40 bg-card/60 py-3 shadow-sm backdrop-blur-md">
-      <div className="mx-auto flex w-full max-w-6xl flex-col gap-2 px-4 sm:flex-row sm:items-center sm:justify-between">
+    <header className="relative z-10 border-b border-border/40 bg-card/70 py-3 shadow-sm backdrop-blur-md">
+      <div className={`${APP_CONTAINER} flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between`}>
         <Link href="/" className="flex items-center justify-center gap-2 sm:justify-start">
-          <ChatGPT />
-          <span className="font-medium">知命阁</span>
+          <TaijiIcon />
+          <span className="font-medium tracking-wide">知命阁</span>
         </Link>
         <nav className="flex flex-wrap items-center justify-center gap-x-4 gap-y-1">
           {NAV_ITEMS.map((item) => (

components/layout/mode-workspace.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { Sparkles } from "lucide-react";
+import { APP_CONTAINER } from "@/lib/layout";
 
 export function ModeWorkspace({
   children,
@@ -12,18 +13,20 @@ export function ModeWorkspace({
   aiTitle?: string;
 }) {
   return (
-    <div className="mx-auto w-full max-w-6xl px-4 py-6 lg:py-8">
-      <div className="grid gap-6 lg:grid-cols-[minmax(0,1fr)_minmax(280px,380px)] lg:items-start lg:gap-8">
-        <div className="space-y-5">{children}</div>
-        <aside className="lg:sticky lg:top-6">
-          <div className="zen-card flex min-h-[320px] flex-col rounded-2xl border border-border/60 bg-card/90 shadow-md backdrop-blur-sm lg:min-h-[calc(100vh-8rem)]">
+    <div className={`${APP_CONTAINER} py-6 lg:py-8`}>
+      <div className="grid gap-6 lg:grid-cols-2 lg:items-stretch lg:gap-8 xl:gap-10">
+        <div className="grid h-full min-h-0 auto-rows-fr gap-5 lg:min-h-[calc(100vh-9rem)]">
+          {children}
+        </div>
+        <aside className="flex min-h-[320px] flex-col lg:min-h-[calc(100vh-9rem)]">
+          <div className="zen-card flex min-h-0 flex-1 flex-col rounded-2xl border border-border/60 bg-card/90 shadow-md backdrop-blur-sm">
             <div className="flex items-center gap-2 border-b border-border/50 px-5 py-4">
               <Sparkles size={18} className="text-primary/80" />
               <h2 className="text-sm font-medium tracking-widest text-muted-foreground">
                 {aiTitle}
               </h2>
             </div>
-            <div className="flex flex-1 flex-col p-4 sm:p-5">{aiPanel}</div>
+            <div className="flex min-h-0 flex-1 flex-col p-4 sm:p-5">{aiPanel}</div>
           </div>
         </aside>
       </div>

components/layout/taiji-backdrop.tsx

@@ -0,0 +1,15 @@
+import { TaijiWatermark } from "@/components/svg/taiji";
+
+/** 全页太极背景水印 */
+export default function TaijiBackdrop() {
+  return (
+    <div
+      aria-hidden
+      className="pointer-events-none fixed inset-0 -z-10 overflow-hidden bg-background/80"
+    >
+      <TaijiWatermark className="absolute left-1/2 top-1/2 h-[min(95vmin,1200px)] w-[min(95vmin,1200px)] -translate-x-1/2 -translate-y-1/2 opacity-90" />
+      <TaijiWatermark className="absolute -right-[8%] top-[6%] h-[min(42vmin,520px)] w-[min(42vmin,520px)] opacity-45" />
+      <TaijiWatermark className="absolute -left-[10%] bottom-[4%] h-[min(38vmin,460px)] w-[min(38vmin,460px)] opacity-40" />
+    </div>
+  );
+}

components/modes/bazi-form.tsx

@@ -109,7 +109,7 @@ export default function BaziForm() {
         />
       }
     >
-      <ZenCard title="出生 · 命局" subtitle="四柱排盘所需信息">
+      <ZenCard title="出生 · 命局" subtitle="四柱排盘所需信息" className="flex h-full min-h-0 flex-col">
         <DateTimePicker
           label="出生日期 / 时间"
           date={date}
@@ -148,7 +148,7 @@ export default function BaziForm() {
         />
       </ZenCard>
 
-      <ZenCard title="问事 · 排盘" subtitle="所求与命盘结果">
+      <ZenCard title="问事 · 排盘" subtitle="所求与命盘结果" className="flex h-full min-h-0 flex-col">
         <Textarea
           placeholder="事业、婚姻、健康等..."
           value={question}

components/modes/combined-form.tsx

@@ -156,7 +156,7 @@ export default function CombinedForm() {
         />
       }
     >
-      <ZenCard title="人和 · 生辰" subtitle="出生时空与地域">
+      <ZenCard title="人和 · 生辰" subtitle="出生时空与地域" className="flex h-full min-h-0 flex-col">
         <DateTimePicker
           label="出生日期 / 时间"
           date={birthDate}
@@ -195,7 +195,7 @@ export default function CombinedForm() {
         />
       </ZenCard>
 
-      <ZenCard title="天时地利 · 问事" subtitle="当前时空与所求">
+      <ZenCard title="天时地利 · 问事" subtitle="当前时空与所求" className="flex h-full min-h-0 flex-col">
         <RegionSelect
           label="当前所在地域"
           provinceCode={currentProvince}

components/modes/liuyao-form.tsx

@@ -117,7 +117,7 @@ export default function LiuyaoForm() {
         />
       }
     >
-      <ZenCard title="问事 · 心意" subtitle="所求何事，心诚则灵">
+      <ZenCard title="问事 · 心意" subtitle="所求何事，心诚则灵" className="flex h-full min-h-0 flex-col">
         <Textarea
           placeholder="您想算点什么？"
           value={question}
@@ -139,7 +139,7 @@ export default function LiuyaoForm() {
         </div>
       </ZenCard>
 
-      <ZenCard title="起卦 · 时空" subtitle="地域、时辰与六爻">
+      <ZenCard title="起卦 · 时空" subtitle="地域、时辰与六爻" className="flex h-full min-h-0 flex-col">
         <RegionSelect
           label="起卦地域"
           provinceCode={provinceCode}

components/page-shell.tsx

@@ -1,5 +1,6 @@
 import Header from "@/components/header";
 import Footer from "@/components/footer";
+import TaijiBackdrop from "@/components/layout/taiji-backdrop";
 
 export default function PageShell({
   children,
@@ -9,11 +10,10 @@ export default function PageShell({
   className?: string;
 }) {
   return (
-    <div className="flex min-h-screen flex-col">
+    <div className="relative flex min-h-screen flex-col">
+      <TaijiBackdrop />
       <Header />
-      <div className={`mx-auto flex w-full flex-1 flex-col ${className}`}>
-        {children}
-      </div>
+      <div className={`flex w-full flex-1 flex-col ${className}`}>{children}</div>
       <Footer />
     </div>
   );

components/result-ai.tsx

@@ -2,6 +2,7 @@ import React, { useEffect, useRef, useState } from "react";
 import { RotateCw } from "lucide-react";
 import Markdown from "react-markdown";
 import { Button } from "@/components/ui/button";
+import { TaijiIcon } from "@/components/svg/taiji";
 import { cn } from "@/lib/utils";
 
 function ResultAI({
@@ -85,8 +86,8 @@ function ResultAI({
           <p className="text-sm text-muted-foreground">正在等待 AI 响应...</p>
         ) : (
           <div className="flex h-full min-h-[200px] flex-col items-center justify-center text-center text-muted-foreground">
-            <p className="text-4xl opacity-20">☯</p>
-            <p className="mt-3 max-w-[200px] text-sm leading-relaxed">
+            <TaijiIcon className="h-16 w-16 opacity-25" />
+            <p className="mt-3 max-w-[220px] text-sm leading-relaxed">
               {emptyHint}
             </p>
           </div>

components/svg/taiji.tsx

@@ -0,0 +1,53 @@
+import React from "react";
+import { cn } from "@/lib/utils";
+
+const YANG = "fill-stone-100 dark:fill-stone-200";
+const YIN = "fill-stone-800 dark:fill-stone-900";
+
+/** 太极阴阳鱼图标（页眉 Logo） */
+export const TaijiIcon = React.memo(function TaijiIcon({
+  className,
+}: {
+  className?: string;
+}) {
+  return (
+    <svg
+      viewBox="0 0 64 64"
+      xmlns="http://www.w3.org/2000/svg"
+      className={cn("h-7 w-7 shrink-0 drop-shadow-sm", className)}
+      aria-hidden
+    >
+      <circle cx="32" cy="32" r="30" className={YANG} />
+      <path
+        d="M32 2a30 30 0 0 1 0 60 15 15 0 0 1 0-30 15 15 0 0 0 0-30z"
+        className={YIN}
+      />
+      <circle cx="32" cy="17" r="5" className={YANG} />
+      <circle cx="32" cy="47" r="5" className={YIN} />
+    </svg>
+  );
+});
+
+/** 背景用水印版太极 */
+export function TaijiWatermark({
+  className,
+}: {
+  className?: string;
+}) {
+  return (
+    <svg
+      viewBox="0 0 200 200"
+      xmlns="http://www.w3.org/2000/svg"
+      className={className}
+      aria-hidden
+    >
+      <circle cx="100" cy="100" r="98" className={`${YANG} opacity-[0.35]`} />
+      <path
+        d="M100 2a98 98 0 0 1 0 196 49 49 0 0 1 0-98 49 49 0 0 0 0-98z"
+        className={`${YIN} opacity-[0.08] dark:opacity-[0.12]`}
+      />
+      <circle cx="100" cy="51" r="10" className={`${YANG} opacity-50`} />
+      <circle cx="100" cy="149" r="10" className={`${YIN} opacity-20 dark:opacity-30`} />
+    </svg>
+  );
+}