Refine responsive catalog and branding

app/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { FormEvent, useMemo, useState } from "react";
+import { FormEvent, useEffect, useMemo, useState } from "react";
 import {
   CATALOG_COUNTS,
   CATALOG_PRODUCTS as RAW_CATALOG_PRODUCTS,
@@ -352,6 +352,7 @@ function Metric({ label, value }: { label: string; value: string }) {
 
 export default function Home() {
   const [stage, setStage] = useState(0);
+  const [mobileMenuOpen, setMobileMenuOpen] = useState(false);
   const [requirements, setRequirements] = useState(DEFAULT_REQUIREMENTS);
   const [showSampleForm, setShowSampleForm] = useState(false);
   const [submitted, setSubmitted] = useState(false);
@@ -360,9 +361,14 @@ export default function Home() {
   const [catalogCategory, setCatalogCategory] = useState("全部产品");
   const [catalogScale, setCatalogScale] = useState("all");
   const [catalogLimit, setCatalogLimit] = useState(24);
+  const [catalogToolbarCompact, setCatalogToolbarCompact] = useState(false);
+  const [catalogToolbarFiltersOpen, setCatalogToolbarFiltersOpen] = useState(false);
+  const [catalogToolbarHidden, setCatalogToolbarHidden] = useState(false);
   const [precisionGearQuery, setPrecisionGearQuery] = useState("");
   const [precisionGearCategory, setPrecisionGearCategory] = useState("全部子类");
   const [precisionGearLimit, setPrecisionGearLimit] = useState(24);
+  const [precisionGearToolbarCompact, setPrecisionGearToolbarCompact] = useState(false);
+  const [precisionGearFiltersOpen, setPrecisionGearFiltersOpen] = useState(false);
   const [selectedCatalogProduct, setSelectedCatalogProduct] = useState<CatalogProduct | null>(null);
   const [catalogVisualMode, setCatalogVisualMode] = useState<CatalogVisualMode>("main");
 
@@ -419,12 +425,41 @@ export default function Home() {
     ? getCatalogProductDimensionImage(selectedCatalogProduct)
     : null;
 
+  useEffect(() => {
+    function updateCatalogToolbarState() {
+      const toolbar = document.querySelector(".catalog-toolbar");
+      const shouldCompact = window.innerWidth <= 720 && Boolean(toolbar) && toolbar.getBoundingClientRect().top <= 72 && window.scrollY > 0;
+      setCatalogToolbarCompact((current) => (current === shouldCompact ? current : shouldCompact));
+      if (!shouldCompact) setCatalogToolbarFiltersOpen(false);
+
+      const precisionHeading = document.querySelector(".precision-gear-catalog-heading");
+      const shouldHideCatalogToolbar = window.innerWidth <= 720 && Boolean(precisionHeading) && precisionHeading.getBoundingClientRect().top <= 72;
+      setCatalogToolbarHidden((current) => (current === shouldHideCatalogToolbar ? current : shouldHideCatalogToolbar));
+
+      const precisionToolbar = document.querySelector(".precision-gear-controls");
+      const shouldCompactPrecision = window.innerWidth <= 720 && Boolean(precisionToolbar) && precisionToolbar.getBoundingClientRect().top <= 72 && window.scrollY > 0;
+      setPrecisionGearToolbarCompact((current) => (current === shouldCompactPrecision ? current : shouldCompactPrecision));
+      if (!shouldCompactPrecision) setPrecisionGearFiltersOpen(false);
+    }
+
+    updateCatalogToolbarState();
+    window.addEventListener("scroll", updateCatalogToolbarState, { passive: true });
+    document.addEventListener("scroll", updateCatalogToolbarState, { passive: true, capture: true });
+    window.addEventListener("resize", updateCatalogToolbarState);
+    return () => {
+      window.removeEventListener("scroll", updateCatalogToolbarState);
+      document.removeEventListener("scroll", updateCatalogToolbarState, true);
+      window.removeEventListener("resize", updateCatalogToolbarState);
+    };
+  }, []);
+
   function openCatalogProduct(product: CatalogProduct) {
     setSelectedCatalogProduct(product);
     setCatalogVisualMode("main");
   }
 
   function startSelection() {
+    setMobileMenuOpen(false);
     setStage(1);
     requestAnimationFrame(() => {
       document.getElementById("selector")?.scrollIntoView({ behavior: "smooth", block: "start" });
@@ -454,22 +489,33 @@ export default function Home() {
   return (
     <main>
       <header className="site-header">
-        <a className="brand" href="#top" aria-label="高徳乐 AI选型首页">
-          <span className="brand-mark">G</span>
-          <span>
+        <a className="brand" href="#top" aria-label="高德乐 AI选型首页">
+          <span className="brand-wordmark">
             <strong>GAUDELOT</strong>
-            <small>高徳乐 · 精密传动</small>
+            <small>高德乐</small>
           </span>
         </a>
-        <nav aria-label="主导航">
-          <a href="#selector">AI选型</a>
-          <a href="#products">完整目录</a>
-          <a href="#precision-gears">精密齿轮</a>
-          <a href="#how">服务流程</a>
+        <nav id="mobile-primary-nav" className={mobileMenuOpen ? "is-open" : ""} aria-label="主导航">
+          <a href="#selector" onClick={() => setMobileMenuOpen(false)}>AI选型</a>
+          <a href="#products" onClick={() => setMobileMenuOpen(false)}>完整目录</a>
+          <a href="#precision-gears" onClick={() => setMobileMenuOpen(false)}>精密齿轮</a>
+          <a href="#how" onClick={() => setMobileMenuOpen(false)}>服务流程</a>
         </nav>
-        <button className="header-cta" type="button" onClick={startSelection}>
-          开始选型 <span>→</span>
-        </button>
+        <div className="header-actions">
+          <button className="header-cta" type="button" onClick={startSelection}>
+            开始选型 <span>→</span>
+          </button>
+          <button
+            className="mobile-menu-toggle"
+            type="button"
+            aria-expanded={mobileMenuOpen}
+            aria-controls="mobile-primary-nav"
+            onClick={() => setMobileMenuOpen((open) => !open)}
+          >
+            <span aria-hidden="true">{mobileMenuOpen ? "×" : "☰"}</span>
+            <small>{mobileMenuOpen ? "关闭" : "菜单"}</small>
+          </button>
+        </div>
       </header>
 
       <section className="hero" id="top">
@@ -962,6 +1008,7 @@ export default function Home() {
           <p>官方目录按八个主分类收录{CATALOG_PRODUCTS.length}款产品；静音舵机作为特色子集筛选，不重复计入产品总数。</p>
         </div>
 
+        <div className="catalog-directory">
         <div className="catalog-summary" aria-label="产品分类统计">
           {PRIMARY_CATALOG_CATEGORIES.map((category) => (
             <button
@@ -980,7 +1027,7 @@ export default function Home() {
         </div>
         <p className="catalog-category-note">分类已按官方目录表头及业务规则复核 · 八个主分类合计{CATALOG_PRODUCTS.length}款 · 舵盘配件6款 · 静音舵机11款为标准舵机特色子集</p>
 
-        <div className="catalog-toolbar">
+        <div className={`catalog-toolbar ${catalogToolbarCompact ? "is-compact" : ""} ${catalogToolbarFiltersOpen ? "filters-open" : ""} ${catalogToolbarHidden ? "is-hidden" : ""}`}>
           <label className="catalog-search">
             <span>⌕</span>
             <input
@@ -996,6 +1043,14 @@ export default function Home() {
               <button type="button" onClick={() => setCatalogQuery("")} aria-label="清空搜索">×</button>
             )}
           </label>
+          <button
+            className="catalog-mobile-filter-toggle"
+            type="button"
+            aria-expanded={catalogToolbarFiltersOpen}
+            onClick={() => setCatalogToolbarFiltersOpen((open) => !open)}
+          >
+            {catalogToolbarFiltersOpen ? "收起" : "筛选"}
+          </button>
           <div className="category-pills" aria-label="产品类别筛选">
             {CATALOG_FILTER_CATEGORIES.map((category) => (
               <button
@@ -1056,7 +1111,6 @@ export default function Home() {
                     <span className="catalog-placeholder">GAUDELOT</span>
                   )}
                   <small>{product.category}</small>
-                  <span className="catalog-zoom-hint">点击查看大图</span>
                 </button>
                 <div className="catalog-card-body">
                   <p>{product.code}</p>
@@ -1090,25 +1144,10 @@ export default function Home() {
             </button>
           </div>
         )}
+        </div>
 
-        <aside className="precision-gear-panel" id="precision-gears" aria-labelledby="precision-gears-title">
-          <div className="precision-gear-copy">
-            <p className="eyebrow"><span /> 精密齿轮</p>
-            <h3 id="precision-gears-title">精密齿轮配件</h3>
-            <p>独立目录收录 511 款产品，覆盖 11 个子类，为微型传动、机构配套与定制开发提供齿轮件支持。</p>
-          </div>
-          <div className="precision-gear-overview">
-            <div className="precision-gear-stat"><strong>511</strong><span>款产品</span></div>
-            <div className="precision-gear-stat"><strong>11</strong><span>个子类</span></div>
-            <div className="precision-gear-subcats" aria-label="精密齿轮配件子类">
-              {PRECISION_GEAR_SUBCATEGORIES.map(([name, count]) => (
-                <span key={name}>{name} <b>{count}</b></span>
-              ))}
-            </div>
-          </div>
-        </aside>
-
-        <div className="precision-gear-catalog" aria-label="精密齿轮配件产品卡片">
+        <p className="eyebrow precision-gear-section-label"><span /> 精密齿轮</p>
+        <div className="precision-gear-catalog" id="precision-gears" aria-label="精密齿轮配件产品卡片">
           <div className="precision-gear-catalog-heading">
             <div>
               <p className="step-kicker">产品卡片目录</p>
@@ -1116,7 +1155,7 @@ export default function Home() {
             </div>
             <p>小型卡片展示型号、子类和关键规格，点击图片可查看产品大图与完整参数。</p>
           </div>
-          <div className="precision-gear-controls">
+          <div className={`precision-gear-controls ${precisionGearToolbarCompact ? "is-compact" : ""} ${precisionGearFiltersOpen ? "filters-open" : ""}`}>
             <input
               value={precisionGearQuery}
               onChange={(event) => {
@@ -1126,6 +1165,14 @@ export default function Home() {
               placeholder="搜索齿轮名称、编码、材质或规格"
               aria-label="搜索精密齿轮配件"
             />
+            <button
+              className="precision-gear-mobile-filter-toggle"
+              type="button"
+              aria-expanded={precisionGearFiltersOpen}
+              onClick={() => setPrecisionGearFiltersOpen((open) => !open)}
+            >
+              {precisionGearFiltersOpen ? "收起" : "筛选"}
+            </button>
             <div className="precision-gear-pills" aria-label="精密齿轮子类筛选">
               <button
                 type="button"
@@ -1302,8 +1349,7 @@ export default function Home() {
 
       <footer>
         <div className="brand footer-brand">
-          <span className="brand-mark">G</span>
-          <span><strong>GAUDELOT</strong><small>高徳乐 · 精密传动</small></span>
+          <span className="brand-wordmark"><strong>GAUDELOT</strong><small>高德乐</small></span>
         </div>
         <p>AI选型结果仅供初步筛选，最终型号、价格、交期与适配结果以工程师和正式文件确认为准。</p>
         <span>内部原型 · V1</span>