hjc-web/app/templates/template-09/components/HeroSection.vue

<template>
  <section class="bg-white pt-4 pb-2">
    <div class="t9-container">
      <div class="relative overflow-hidden group w-full h-[220px] sm:h-[300px] lg:h-[380px] bg-[var(--t9-primary-soft)]">
        <!-- 轮播图模式 -->
        <template v-if="bannerMode">
          <div
            v-for="(b, i) in banners"
            :key="b.id || i"
            class="absolute inset-0 transition-opacity duration-700 ease-in-out"
            :class="i === currentBannerIndex ? 'opacity-100' : 'opacity-0 pointer-events-none'"
          >
            <a v-if="bannerLink(b)" :href="bannerLink(b)" target="_blank" rel="noopener" class="block w-full h-full">
              <img :src="bannerImg(b)" :alt="b.title || siteName" class="w-full h-full object-cover">
            </a>
            <img v-else :src="bannerImg(b)" :alt="b.title || siteName" class="w-full h-full object-cover">
          </div>
        </template>

        <!-- 无图兜底：墨绿渐变 + 站点标语 -->
        <template v-else>
          <div
            class="absolute inset-0"
            style="background-image: linear-gradient(120deg, #008960 0%, #00a878 100%)"
          ></div>
          <div class="absolute -top-16 -left-10 w-64 h-64 rounded-full bg-white/10 blur-3xl"></div>
          <div class="absolute -bottom-20 -right-6 w-72 h-72 rounded-full bg-black/10 blur-3xl"></div>
          <div class="relative z-10 h-full flex flex-col items-center justify-center text-center text-white px-6">
            <h1 class="text-2xl sm:text-3xl lg:text-4xl font-bold tracking-wide mb-4">{{ heroTitle }}</h1>
            <p class="text-sm sm:text-base max-w-2xl text-white/90 t9-clamp-2">{{ heroSubtitle }}</p>
          </div>
        </template>

        <!-- 左右箭头 -->
        <button
          v-if="bannerMode && banners.length > 1"
          type="button" aria-label="上一张"
          class="absolute left-0 top-1/2 -translate-y-1/2 w-10 h-16 bg-black/40 hover:bg-black/60 text-white flex items-center justify-center opacity-0 group-hover:opacity-100 transition z-20"
          @click="prev"
        >
          <svg class="w-6 h-6" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7" /></svg>
        </button>
        <button
          v-if="bannerMode && banners.length > 1"
          type="button" aria-label="下一张"
          class="absolute right-0 top-1/2 -translate-y-1/2 w-10 h-16 bg-black/40 hover:bg-black/60 text-white flex items-center justify-center opacity-0 group-hover:opacity-100 transition z-20"
          @click="next"
        >
          <svg class="w-6 h-6" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" /></svg>
        </button>

        <!-- 指示点（右下角，对齐原站 .dot 样式） -->
        <div
          v-if="bannerMode && banners.length > 1"
          class="absolute bottom-0 left-0 right-0 h-[30px] bg-[#6c7475]/80 flex items-center justify-end pr-4 gap-1.5 z-20"
        >
          <button
            v-for="(b, i) in banners"
            :key="'dot-' + (b.id || i)"
            type="button"
            :aria-label="'切换到第 ' + (i + 1) + ' 张'"
            class="w-2.5 h-2.5 rounded-full border border-white transition"
            :class="i === currentBannerIndex ? 'bg-white' : 'bg-white/40 hover:bg-white/70'"
            @click="goTo(i)"
          />
        </div>
      </div>
    </div>
  </section>
</template>

<script setup lang="ts">
/**
 * 模板 9 - Hero 主视觉区（墨绿文化出版风）
 *
 * 对齐原站：1200px 定宽、380px 高的 Banner，右下角灰条 + 白色小圆点指示器。
 *  - 有轮播图：图片走马灯 + 左右箭头 + 底部指示条；
 *  - 无轮播图：墨绿渐变 + 站点标语兜底。
 */
import type { CmsBanner, ApiEnvelope, PageResult } from '~/types'
import { ensureFullUrl } from '~/utils/image'
import { getBannerLink } from '~/utils'

const { siteInfo, siteName, fetchSiteInfo } = useSite()
await fetchSiteInfo()

/** 轮播图数据（SSR 预取，首屏即有） */
const { data: bannerRes } = await useFetch<ApiEnvelope<PageResult<CmsBanner>> | PageResult<CmsBanner>>('/api/banner', {
  query: { position: 'home_slider' }
})
const banners = computed<CmsBanner[]>(() => {
  const d = bannerRes.value as (ApiEnvelope<PageResult<CmsBanner>> | PageResult<CmsBanner>) | null
  if (!d) return []
  const list = ((d as ApiEnvelope<PageResult<CmsBanner>>)?.data?.list
    ?? (d as PageResult<CmsBanner>)?.list
    ?? []) as CmsBanner[]
  return list
    .filter((b) => hasImage(b) && b.deleted !== 1 && b.status !== 2)
    .sort((a, b) => (a.sortNum ?? 0) - (b.sortNum ?? 0))
})

/** 是否有轮播图 */
const bannerMode = computed(() => banners.value.length > 0)

/** 当前帧索引 */
const currentBannerIndex = ref(0)
let bannerTimer: ReturnType<typeof setInterval> | null = null

function startAuto() {
  if (banners.value.length > 1) {
    bannerTimer = setInterval(() => {
      currentBannerIndex.value = (currentBannerIndex.value + 1) % banners.value.length
    }, 5000)
  }
}
function stopAuto() {
  if (bannerTimer) { clearInterval(bannerTimer); bannerTimer = null }
}

onMounted(() => { startAuto() })
onBeforeUnmount(() => { stopAuto() })

function prev() {
  const n = banners.value.length
  currentBannerIndex.value = (currentBannerIndex.value - 1 + n) % n
}
function next() {
  const n = banners.value.length
  currentBannerIndex.value = (currentBannerIndex.value + 1) % n
}
function goTo(i: number) {
  currentBannerIndex.value = i
}

/** 取轮播图地址（兼容 image/imageUrl/pic/url，并提升 OSS 压缩宽度） */
function bannerImg(b: CmsBanner): string {
  const raw = ensureFullUrl(b.image || b.imageUrl || b.pic || b.url || '')
  return raw.replace(/resize,w_\d+/, 'resize,w_1600')
}

/** 取轮播图跳转链接（统一走 utils.getBannerLink，兼容 link/linkUrl/link_url 多字段名） */
function bannerLink(b: CmsBanner): string {
  return getBannerLink(b)
}

/** 是否有可用图片 */
function hasImage(b: CmsBanner): boolean {
  return !!(b.image || b.imageUrl || b.pic || b.url)
}

const heroTitle = computed(() => siteInfo.value?.slogan || siteName.value || '欢迎来到我们的官网')
const heroSubtitle = computed(() => siteInfo.value?.comments || '专注内容出版与文化传播，用好书连接读者与世界。')
</script>