feat: 添加连锁门店系统首页及核心UI组件

新增首页布局、导航栏、页脚及多个核心UI组件（按钮、卡片、表格等）
添加图片资源、工具函数和样式配置
实现响应式设计和主题支持
包含行业解决方案展示区块

components/sections/news-section.tsx

@@ -0,0 +1,81 @@
+import { Badge } from "@/components/ui/badge"
+import { Card, CardContent } from "@/components/ui/card"
+import { Building2, TrendingUp, Quote } from "lucide-react"
+import homeData from "@/data/home.json"
+
+export function NewsSection() {
+  const { cases } = homeData
+
+  return (
+    <section id="cases" className="py-20 lg:py-28 bg-neutral-50/80">
+      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+        {/* Header */}
+        <div className="flex flex-col items-center text-center gap-4 mb-14">
+          <Badge
+            variant="outline"
+            className="border-primary/30 text-primary bg-primary-light px-4 py-1 text-sm font-medium"
+          >
+            {cases.sectionBadge}
+          </Badge>
+          <h2 className="text-3xl sm:text-4xl lg:text-5xl font-bold text-foreground text-balance">
+            {cases.title}
+          </h2>
+          <p className="text-muted-foreground text-base lg:text-lg max-w-2xl text-pretty">
+            {cases.subtitle}
+          </p>
+        </div>
+
+        {/* Cases grid */}
+        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
+          {cases.items.map((item, index) => (
+            <Card
+              key={item.brand}
+              className="group border border-border bg-background hover:border-primary/35 hover:shadow-xl hover:shadow-primary/8 transition-all duration-300 overflow-hidden"
+            >
+              {/* Top accent bar */}
+              <div className="h-1.5 bg-primary" style={{ opacity: 0.6 + index * 0.2 }} />
+
+              <CardContent className="p-7 flex flex-col gap-5">
+                {/* Brand header */}
+                <div className="flex items-start gap-3">
+                  <div className="w-10 h-10 rounded-xl bg-primary/10 flex items-center justify-center shrink-0 text-primary">
+                    <Building2 className="w-5 h-5" />
+                  </div>
+                  <div>
+                    <p className="font-bold text-sm text-foreground leading-snug">{item.brand}</p>
+                    <p className="text-xs text-muted-foreground mt-0.5">{item.scale}</p>
+                  </div>
+                </div>
+
+                {/* Challenge */}
+                <div className="bg-neutral-50 rounded-xl p-4 border border-border">
+                  <div className="flex items-center gap-1.5 text-xs font-semibold text-muted-foreground mb-2 uppercase tracking-wide">
+                    <Quote className="w-3 h-3" />
+                    挑战
+                  </div>
+                  <p className="text-sm text-foreground leading-relaxed">{item.challenge}</p>
+                </div>
+
+                {/* Result */}
+                <div className="flex items-start gap-2">
+                  <TrendingUp className="w-4 h-4 text-primary mt-0.5 shrink-0" />
+                  <p className="text-sm text-muted-foreground leading-relaxed">{item.result}</p>
+                </div>
+
+                {/* Metrics */}
+                <div className="grid grid-cols-3 gap-2 pt-2 border-t border-border">
+                  {item.metrics.map((m) => (
+                    <div key={m.l} className="flex flex-col items-center text-center gap-0.5">
+                      <span className="text-xl font-black text-primary leading-none">{m.v}</span>
+                      <span className="text-[11px] text-muted-foreground leading-tight">{m.l}</span>
+                    </div>
+                  ))}
+                </div>
+              </CardContent>
+            </Card>
+          ))}
+        </div>
+      </div>
+    </section>
+  )
+}