feat: update homepage hero messaging

src/components/Header.astro

@@ -11,7 +11,7 @@ const nav = site.nav.map((item) => item.href === "/articles/" ? { ...item, child
   <div class="container site-header__inner">
     <a class="brand" href="/" aria-label="启优学首页"><img src={logo.src} width="1214" height="910" alt="启优学一对一" /></a>
     <nav class="desktop-nav" aria-label="主导航"><ul>{nav.map((item) => <li class="nav-item"><a class="nav-link" href={item.href} aria-current={isActive(item.href) ? "page" : undefined}>{item.label}</a><div class="nav-dropdown"><ul>{item.children.map((child) => <li><a href={child.href}>{child.label}</a></li>)}</ul></div></li>)}</ul></nav>
-    <a class="button button--small header-cta" href="/contact/">预约学情分析</a>
-    <details class="mobile-nav"><summary aria-label="打开导航菜单"><span></span><span></span><span></span></summary><nav data-mobile-nav aria-label="移动端导航">{nav.map((item) => <div class="mobile-nav__group"><a class="mobile-nav__primary" href={item.href} aria-current={isActive(item.href) ? "page" : undefined}>{item.label}</a><div class="mobile-subnav">{item.children.map((child) => <a href={child.href}>{child.label}</a>)}</div></div>)}<a class="button" href="/contact/">预约学情分析</a></nav></details>
+    <a class="button button--small header-cta" href="/contact/">免费领取学情分析</a>
+    <details class="mobile-nav"><summary aria-label="打开导航菜单"><span></span><span></span><span></span></summary><nav data-mobile-nav aria-label="移动端导航">{nav.map((item) => <div class="mobile-nav__group"><a class="mobile-nav__primary" href={item.href} aria-current={isActive(item.href) ? "page" : undefined}>{item.label}</a><div class="mobile-subnav">{item.children.map((child) => <a href={child.href}>{child.label}</a>)}</div></div>)}<a class="button" href="/contact/">免费领取学情分析</a></nav></details>
   </div>
 </header>

src/data/site.ts

@@ -14,8 +14,8 @@ export const site = {
     industry: "小学 · 初中 · 高中在线一对一辅导",
   },
   home: {
-    headline: "先看清问题，再规划每一步",
-    subhead: "面向小学、初中和高中学生，从学情诊断出发，匹配固定教师，围绕当前基础、校内进度与阶段目标制定在线一对一学习方案。",
+    headline: "优质师资直达，个性化辅导看得见，打破地域壁垒，让优质教育触手可及",
+    subhead: "名师精准辅导，选择启优学一对一",
     stats: [
       { value: "20000+", label: "签约严选教师" },
       { value: "约 3%", label: "师资录取率" },

src/pages/index.astro

@@ -12,7 +12,7 @@ const latest = (await getPublishedArticles()).slice(0, 3);
 const jsonLd = [{ "@context": "https://schema.org", "@type": "Service", name: "启优学在线一对一个性化辅导", provider: { "@id": new URL("/#organization", Astro.site).href }, areaServed: { "@type": "Country", name: "中国" }, audience: { "@type": "EducationalAudience", educationalRole: "student" }, description: site.home.subhead }, { "@context": "https://schema.org", "@type": "FAQPage", mainEntity: site.faq.slice(0, 4).map((item) => ({ "@type": "Question", name: item.q, acceptedAnswer: { "@type": "Answer", text: item.a } })) }];
 ---
 <Base title={site.seo.title} jsonLd={jsonLd}><Header /><main id="main-content">
-  <section class="home-hero"><div class="container home-hero__grid"><div class="home-hero__copy" data-reveal><div class="hero-label"><strong>小初高在线辅导</strong></div><h1>不是多上一节课<br /><em>是让每一步更适合孩子</em></h1><p>{site.home.subhead}</p><div class="hero__actions"><a class="button" href="/contact/">免费领取学情分析</a><a class="button button--outline" href="#workflow">了解学习流程</a></div><div class="hero__proof"><span>固定教师</span><span>互动课堂</span><span>课程回放</span><span>阶段复盘</span></div></div><div class="home-hero__visual" data-reveal><div class="image-frame"><Image src={heroImage} widths={[580, 760, 980]} sizes="(max-width: 760px) 100vw, 52vw" alt="启优学老师与学生在线一对一互动学习" format="webp" loading="eager" fetchpriority="high" /></div></div></div><div class="container stage-ruler" aria-label="覆盖学段"><span>小学 1-6 年级</span><i></i><span>初中 1-3 年级</span><i></i><span>高中 1-3 年级</span></div></section>
+  <section class="home-hero"><div class="container home-hero__grid"><div class="home-hero__copy" data-reveal><div class="hero-label"><strong>小初高在线辅导</strong></div><h1><span>优质师资直达，个性化辅导看得见</span><em>打破地域壁垒，让优质教育触手可及</em></h1><p>{site.home.subhead}</p><div class="hero__actions"><a class="button" href="/contact/">免费领取学情分析</a><a class="button button--outline" href="#workflow">了解学习流程</a></div><div class="hero__proof"><span>固定教师</span><span>互动课堂</span><span>课程回放</span><span>阶段复盘</span></div></div><div class="home-hero__visual" data-reveal><div class="image-frame"><Image src={heroImage} widths={[580, 760, 980]} sizes="(max-width: 760px) 100vw, 52vw" alt="启优学老师与学生在线一对一互动学习" format="webp" loading="eager" fetchpriority="high" /></div></div></div><div class="container stage-ruler" aria-label="覆盖学段"><span>小学 1-6 年级</span><i></i><span>初中 1-3 年级</span><i></i><span>高中 1-3 年级</span></div></section>
 
   <section class="stat-band"><div class="container stat-grid">{site.home.stats.map((stat) => <div data-reveal><strong>{stat.value}</strong><p>{stat.label}</p></div>)}</div><p class="data-note">师资数据来源于启优学一对一教务系统内部统计，截至 2026 年 7 月；相关数据会随师资及业务情况动态更新。</p></section>