Chore: remove promotional copy and home-training wording

client/src/pages/Home.tsx

@@ -30,18 +30,18 @@ export default function Home() {
         <div className="max-w-3xl mx-auto text-center">
           <div className="inline-flex items-center gap-2 px-3 py-1 rounded-full bg-primary/10 text-primary text-sm font-medium mb-6">
             <Zap className="h-3.5 w-3.5" />
-            AI网球训练助手
+            网球训练系统
           </div>
           <h1 className="text-4xl md:text-5xl lg:text-6xl font-bold tracking-tight leading-tight">
-            精准分析
-            <span className="text-primary block mt-1">高效提升</span>
+            训练记录
+            <span className="text-primary block mt-1">分析与录制</span>
           </h1>
           <p className="text-lg text-muted-foreground mt-6 max-w-xl mx-auto leading-relaxed">
-            AI姿势识别 · 智能训练计划 · 实时动作分析 · 自动评分反馈
+            训练计划 · 姿势分析 · 实时录制 · 评分记录
           </p>
           <div className="flex items-center justify-center gap-3 mt-8">
             <Button onClick={() => setLocation("/login")} size="lg" className="gap-2 h-12 px-6">
-              开始训练
+              进入系统
               <ChevronRight className="h-4 w-4" />
             </Button>
           </div>
@@ -50,43 +50,43 @@ export default function Home() {
 
       {/* Features */}
       <section className="container py-16">
-        <h2 className="text-2xl font-bold text-center mb-12">核心功能</h2>
+        <h2 className="text-2xl font-bold text-center mb-12">功能</h2>
         <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6 max-w-5xl mx-auto">
           {[
             {
               icon: Video,
-              title: "AI姿势识别",
-              desc: "MediaPipe实时分析33个关键点，精准评估挥拍动作",
+              title: "姿势识别",
+              desc: "使用 MediaPipe 分析 33 个关键点并记录挥拍数据",
               color: "bg-blue-50 text-blue-600",
             },
             {
               icon: Target,
-              title: "智能训练计划",
-              desc: "根据水平和分析结果，AI自动生成和调整训练方案",
+              title: "训练计划",
+              desc: "根据水平和分析结果生成训练安排",
               color: "bg-green-50 text-green-600",
             },
             {
               icon: Award,
               title: "NTRP自动评分",
-              desc: "USTA标准五维度评估，每次分析自动更新评分",
+              desc: "按 USTA 维度记录评分结果",
               color: "bg-purple-50 text-purple-600",
             },
             {
               icon: Zap,
               title: "击球统计",
-              desc: "击球次数、挥拍速度、一致性，量化训练效果",
+              desc: "记录击球次数、挥拍速度和一致性",
               color: "bg-orange-50 text-orange-600",
             },
             {
               icon: Footprints,
               title: "运动轨迹",
-              desc: "重心移动轨迹分析，优化脚步移动模式",
+              desc: "记录重心移动轨迹和脚步变化",
               color: "bg-teal-50 text-teal-600",
             },
             {
               icon: TrendingUp,
               title: "进度追踪",
-              desc: "训练历史、能力趋势、评分变化一目了然",
+              desc: "查看训练历史、趋势和评分变化",
               color: "bg-indigo-50 text-indigo-600",
             },
           ].map((feature) => (
@@ -103,11 +103,11 @@ export default function Home() {
 
       {/* How it works */}
       <section className="container py-16">
-        <h2 className="text-2xl font-bold text-center mb-12">使用流程</h2>
+        <h2 className="text-2xl font-bold text-center mb-12">使用步骤</h2>
         <div className="grid grid-cols-1 md:grid-cols-4 gap-6 max-w-4xl mx-auto">
           {[
             { step: "1", title: "输入用户名", desc: "用户名登录即可" },
-            { step: "2", title: "生成计划", desc: "AI个性化训练方案" },
+            { step: "2", title: "生成计划", desc: "生成训练安排" },
             { step: "3", title: "上传视频", desc: "录制挥拍并分析" },
             { step: "4", title: "获取反馈", desc: "评分与矫正建议" },
           ].map((item) => (
@@ -125,10 +125,10 @@ export default function Home() {
       {/* CTA */}
       <section className="container py-16">
         <div className="max-w-2xl mx-auto text-center p-8 rounded-2xl bg-primary/5">
-          <h2 className="text-2xl font-bold mb-3">提升技术，从这里开始</h2>
-          <p className="text-muted-foreground mb-6">输入用户名即可使用全部功能</p>
+          <h2 className="text-2xl font-bold mb-3">登录入口</h2>
+          <p className="text-muted-foreground mb-6">输入用户名后进入系统</p>
           <Button onClick={() => setLocation("/login")} size="lg" className="gap-2">
-            立即开始
+            前往登录
             <ChevronRight className="h-4 w-4" />
           </Button>
         </div>
@@ -141,7 +141,7 @@ export default function Home() {
             <Target className="h-4 w-4" />
             <span>Tennis Hub</span>
           </div>
-          <span>AI网球训练助手</span>
+          <span>训练与分析</span>
         </div>
       </footer>
     </div>