refactor(home): 将首页组件拆分为独立模块并优化代码结构

将首页的加载动画、介绍动画和英雄区域拆分为独立的组件文件
移除index.vue中冗余的样式和逻辑，通过组件引用方式重构
优化代码组织结构，提高可维护性

app/components/home/HomeHero.vue

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+<script setup lang="ts">
+import { onMounted, onBeforeUnmount, ref } from 'vue'
+import type Lenis from 'lenis'
+import gsap from 'gsap'
+
+const heroPinDistance = 1200
+
+const heroGalleryColumns = [
+  {
+    side: 'left',
+    images: [
+      'https://picsum.photos/id/1018/900/1200',
+      'https://picsum.photos/id/1015/900/1200',
+      'https://picsum.photos/id/1024/900/1200',
+      'https://picsum.photos/id/1039/900/1200',
+    ],
+  },
+  {
+    side: 'right',
+    images: [
+      'https://picsum.photos/id/1043/900/1200',
+      'https://picsum.photos/id/1050/900/1200',
+      'https://picsum.photos/id/1067/900/1200',
+      'https://picsum.photos/id/1074/900/1200',
+    ],
+  },
+] as const
+
+const heroStageRef = ref<HTMLElement | null>(null)
+const heroRef = ref<HTMLElement | null>(null)
+const heroPanelRef = ref<HTMLElement | null>(null)
+
+let cleanupHeroScroll: (() => void) | null = null
+
+onMounted(() => {
+  const heroStageElement = heroStageRef.value
+  const heroPanelElement = heroPanelRef.value
+
+  if (!heroStageElement || !heroPanelElement) {
+    return
+  }
+
+  const { $lenis } = useNuxtApp() as ReturnType<typeof useNuxtApp> & { $lenis?: Lenis }
+  const pinEndScale = 0.65
+  const finalScale = 0.18
+  const getExitDistance = () => window.innerHeight
+
+  const setupHeroScroll = () => {
+    cleanupHeroScroll?.()
+
+    gsap.set(heroPanelElement, {
+      scale: 1,
+      force3D: true,
+      transformOrigin: 'center center',
+    })
+
+    let renderedScale = -1
+
+    const setHeroPanelScale = (scale: number) => {
+      if (Math.abs(renderedScale - scale) < 0.001) {
+        return
+      }
+
+      renderedScale = scale
+      gsap.set(heroPanelElement, { scale })
+    }
+
+    const updateHeroPanelScale = () => {
+      const exitDistance = getExitDistance()
+      const totalDistance = heroPinDistance + exitDistance
+      // Lenis 存在时只读 Lenis 的平滑滚动值，避免向上滚时 window.scrollY 和 Lenis 值互相打架。
+      const currentScroll = $lenis ? $lenis.scroll : window.scrollY
+      const currentDistance = gsap.utils.clamp(0, totalDistance, currentScroll - heroStageElement.offsetTop)
+
+      if (currentDistance <= heroPinDistance) {
+        setHeroPanelScale(gsap.utils.interpolate(1, pinEndScale, currentDistance / heroPinDistance))
+        return
+      }
+
+      setHeroPanelScale(
+        gsap.utils.interpolate(
+          pinEndScale,
+          finalScale,
+          (currentDistance - heroPinDistance) / exitDistance,
+        ),
+      )
+    }
+
+    // CSS sticky 负责固定；ticker 每帧读取当前滚动距离，避免依赖 scroll/ScrollTrigger 事件链。
+    updateHeroPanelScale()
+    gsap.ticker.add(updateHeroPanelScale)
+
+    cleanupHeroScroll = () => {
+      gsap.ticker.remove(updateHeroPanelScale)
+    }
+  }
+
+  setupHeroScroll()
+})
+
+onBeforeUnmount(() => {
+  cleanupHeroScroll?.()
+  cleanupHeroScroll = null
+})
+
+defineExpose({
+  heroStageRef,
+  heroRef,
+})
+</script>
+
+<template>
+  <section
+    ref="heroStageRef"
+    class="hero-stage"
+    :style="{ '--hero-pin-distance': `${heroPinDistance}px` }"
+  >
+    <section ref="heroRef" class="hero-section" v-once>
+      <div class="hero-backdrop" aria-hidden="true">
+        <div
+          v-for="column in heroGalleryColumns"
+          :key="column.side"
+          class="hero-gallery"
+          :class="`hero-gallery-${column.side}`"
+        >
+          <!-- 复制两份图片组，配合 translateY(-50%) 做无缝循环。 -->
+          <div
+            class="hero-gallery-track"
+            :class="{ 'hero-gallery-track-slow': column.side === 'right' }"
+          >
+            <div v-for="copy in 2" :key="`${column.side}-copy-${copy}`" class="hero-gallery-group">
+              <img
+                v-for="image in column.images"
+                :key="`${column.side}-${copy}-${image}`"
+                class="hero-gallery-image"
+                :src="image"
+                alt=""
+                decoding="async"
+                loading="eager"
+              />
+            </div>
+          </div>
+        </div>
+      </div>
+      <div ref="heroPanelRef" class="hero-panel">
+        <p>Hero Section</p>
+      </div>
+    </section>
+  </section>
+</template>
+
+<style scoped>
+.hero-stage {
+  position: relative;
+  height: calc(100svh + var(--hero-pin-distance));
+  background: #000;
+}
+
+.hero-section {
+  position: sticky;
+  top: 0;
+  height: 100svh;
+  overflow: hidden;
+  background: #111;
+}
+
+.hero-backdrop {
+  position: absolute;
+  inset: 0;
+  overflow: hidden;
+  background: #000;
+}
+
+.hero-gallery {
+  position: absolute;
+  top: -40px;
+  bottom: -40px;
+  width: 49vw;
+  overflow: hidden;
+}
+
+.hero-gallery-left {
+  left: 0;
+}
+
+.hero-gallery-right {
+  right: 0;
+}
+
+.hero-gallery-track {
+  will-change: transform;
+  animation: hero-gallery-scroll 28s linear infinite;
+}
+
+.hero-gallery-track-slow {
+  animation-duration: 42s;
+}
+
+.hero-gallery-group {
+  display: grid;
+  gap: 36px;
+  padding-bottom: 36px;
+}
+
+.hero-gallery-image {
+  display: block;
+  width: 100%;
+  height: clamp(260px, 42vh, 430px);
+  border-radius: 0;
+  object-fit: cover;
+}
+
+@keyframes hero-gallery-scroll {
+  to {
+    transform: translateY(-50%);
+  }
+}
+
+.hero-panel {
+  position: absolute;
+  inset: 0;
+  display: grid;
+  place-items: center;
+  background: #fff;
+  font-size: 48px;
+  will-change: transform;
+}
+</style>

app/components/home/HomeIntro.vue

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+<script setup lang="ts">
+import { ref } from 'vue'
+
+const introTitle = 'ArcticNewOne'
+const introLetters = introTitle.split('')
+
+const introRef = ref<HTMLElement | null>(null)
+const introTitleRef = ref<HTMLElement | null>(null)
+
+defineExpose({
+  introRef,
+  introTitleRef
+})
+</script>
+
+<template>
+  <div ref="introRef" class="hero-intro" aria-hidden="true">
+    <h1 ref="introTitleRef" class="hero-intro-title" :aria-label="introTitle" v-once>
+      <span class="hero-intro-word">
+        <span
+          v-for="(letter, index) in introLetters"
+          :key="`${letter}-${index}`"
+          class="hero-intro-char-wrap"
+        >
+          <span class="hero-intro-char">{{ letter }}</span>
+        </span>
+        <span class="hero-intro-tm">TM</span>
+      </span>
+    </h1>
+  </div>
+</template>
+
+<style scoped>
+.hero-intro {
+  position: fixed;
+  inset: 0;
+  z-index: 80;
+  display: grid;
+  place-items: center;
+  overflow: hidden;
+  color: #fff;
+  background: #000;
+  opacity: 0;
+  visibility: hidden;
+  will-change: transform;
+}
+
+.hero-intro-title {
+  display: flex;
+  margin: 0;
+  font-size: clamp(36px, 6.2vw, 104px);
+  font-weight: 700;
+  line-height: 0.9;
+  letter-spacing: -0.07em;
+  white-space: nowrap;
+}
+
+.hero-intro-word {
+  position: relative;
+  display: inline-flex;
+}
+
+.hero-intro-char-wrap,
+.hero-intro-char {
+  display: inline-block;
+}
+
+.hero-intro-char-wrap {
+  position: relative;
+  overflow: hidden;
+}
+
+.hero-intro-char {
+  will-change: transform;
+}
+
+.hero-intro-tm {
+  position: absolute;
+  left: calc(100% + 0.12em);
+  top: 0.08em;
+  font-size: 0.13em;
+  font-weight: 700;
+  letter-spacing: -0.02em;
+  line-height: 1;
+  opacity: 0;
+  visibility: hidden;
+}
+</style>

app/components/home/HomeLoader.vue

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+<script setup lang="ts">
+import { ref } from 'vue'
+
+// 定义 loader 相关的 DOM 引用
+const loaderRef = ref<HTMLElement | null>(null)
+const loaderBarRef = ref<HTMLElement | null>(null)
+
+// 暴露这两个 ref 供外部使用
+defineExpose({
+  loaderRef,
+  loaderBarRef
+})
+</script>
+
+<template>
+  <div ref="loaderRef" class="page-loader" aria-hidden="true" v-once>
+    <div class="page-loader-content">
+      <p>Loading</p>
+      <span class="page-loader-line">
+        <span ref="loaderBarRef" class="page-loader-line-inner" />
+      </span>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.page-loader {
+  position: fixed;
+  inset: 0;
+  z-index: 90;
+  display: grid;
+  place-items: center;
+  color: #fff;
+  background: #000;
+  will-change: transform;
+}
+
+.page-loader-content {
+  width: min(220px, calc(100vw - 48px));
+  font-size: 12px;
+  letter-spacing: 0.18em;
+  text-transform: uppercase;
+}
+
+.page-loader-content p {
+  margin: 0 0 14px;
+}
+
+.page-loader-line {
+  display: block;
+  width: 100%;
+  height: 1px;
+  overflow: hidden;
+  background: rgb(255 255 255 / 20%);
+}
+
+.page-loader-line-inner {
+  display: block;
+  width: 100%;
+  height: 100%;
+  background: #fff;
+  transform: scaleX(0);
+  transform-origin: left center;
+}
+</style>