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

hooks/use-parallax.ts

@@ -0,0 +1,48 @@
+"use client"
+
+import { useState, useEffect, useRef, useCallback } from "react"
+
+/**
+ * 监听滚动位置，返回 scrollY 值（被动监听，高性能）
+ */
+export function useScrollY() {
+  const [scrollY, setScrollY] = useState(0)
+
+  useEffect(() => {
+    const onScroll = () => setScrollY(window.scrollY)
+    window.addEventListener("scroll", onScroll, { passive: true })
+    return () => window.removeEventListener("scroll", onScroll)
+  }, [])
+
+  return scrollY
+}
+
+/**
+ * 对给定元素计算视差偏移量
+ * @param speed  视差倍率，0 = 无效果，0.5 = 半速（向上），负值反向
+ * @returns ref + translateY 字符串
+ */
+export function useParallax(speed: number = 0.4) {
+  const ref = useRef<HTMLDivElement>(null)
+  const [offset, setOffset] = useState(0)
+
+  const calculate = useCallback(() => {
+    if (!ref.current) return
+    const rect = ref.current.getBoundingClientRect()
+    const centerY = rect.top + rect.height / 2
+    const viewportCenter = window.innerHeight / 2
+    setOffset((centerY - viewportCenter) * speed)
+  }, [speed])
+
+  useEffect(() => {
+    calculate()
+    window.addEventListener("scroll", calculate, { passive: true })
+    window.addEventListener("resize", calculate, { passive: true })
+    return () => {
+      window.removeEventListener("scroll", calculate)
+      window.removeEventListener("resize", calculate)
+    }
+  }, [calculate])
+
+  return { ref, translateY: `${offset}px` }
+}