feat: 市场调研落地——趋势AI人话解读（plainExplain/takeAway，采集自动生成+SSR+小程序卡）+ 首页今日知识卡

client/src/pages/index/index.vue

@@ -82,6 +82,20 @@
       </view>
     </view>
 
+    <!-- 今日知识卡：每天一条，读了答对就点亮 -->
+    <view class="kcard" v-if="todayKnowledge" @tap="goTodayKnowledge">
+      <view class="kcard-head">
+        <AppIcon name="book" :size="14" />
+        <text class="kcard-label">今日知识卡</text>
+        <text class="kcard-dim">{{ todayDimName }}</text>
+      </view>
+      <text class="kcard-title">{{ todayKnowledge.title }}</text>
+      <text class="kcard-desc">{{ todayKnowledge.content }}</text>
+      <view class="kcard-foot">
+        <text class="kcard-cta">去读一读 · 答对点亮 →</text>
+      </view>
+    </view>
+
     <!-- 今日快讯 -->
     <view class="section-header">
       <text class="section-title">今日快讯</text>
@@ -114,6 +128,18 @@ const dimensions = ref(DIMENSIONS)
 
 const newsList = ref([])
 const byDim = ref({})          // 各星域知识总数
+const todayKnowledge = ref<any>(null)
+
+const todayDimName = computed(() => {
+  const d = DIMENSIONS.find(x => x.id === todayKnowledge.value?.dim)
+  return d ? d.name : ''
+})
+
+function goTodayKnowledge() {
+  if (todayKnowledge.value?._id) {
+    uni.navigateTo({ url: `/pages/detail/detail?id=${todayKnowledge.value._id}` })
+  }
+}
 const userStats = ref(null)    // { totalLit, litByDim, streak }
 const lastRead = ref(null)
 
@@ -128,9 +154,21 @@ const todayLit = computed(() => !!uni.getStorageSync('lit_today'))
 onShow(() => {
   loadStats()
   loadNews()
+  loadTodayKnowledge()
   lastRead.value = uni.getStorageSync('last_read') || null
 })
 
+// 今日知识卡：按日期取当日第 N 条（同一天所有人看到同一条，形成"每日一词"共识感）
+async function loadTodayKnowledge() {
+  try {
+    const data = await knowledgeApi.list({ limit: 50, page: 1 })
+    const items = (data.items || []).filter((x) => x.content)
+    if (!items.length) return
+    const dayIndex = Math.floor(Date.now() / 86400000)
+    todayKnowledge.value = items[dayIndex % items.length]
+  } catch (e) { /* 静默 */ }
+}
+
 onPullDownRefresh(async () => {
   await Promise.all([loadStats(), loadNews()])
   uni.stopPullDownRefresh()
@@ -468,3 +506,42 @@ onShareTimeline(() => ({
 
 .bottom-spacer { height: 30px; }
 </style>
+
+<style scoped>
+.kcard {
+  background: linear-gradient(135deg, rgba(91, 95, 248, 0.08), rgba(139, 92, 246, 0.05));
+  border: 1px solid var(--glass-hover-border);
+  border-radius: var(--radius-lg);
+  padding: 14px 16px;
+  margin-bottom: 12px;
+}
+.kcard-head { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; }
+.kcard-label { font-size: 12px; font-weight: 700; color: var(--color-brand); }
+.kcard-dim {
+  margin-left: auto;
+  font-size: 10px;
+  color: var(--text-tertiary);
+  background: var(--glass-bg);
+  border-radius: 999px;
+  padding: 2px 8px;
+}
+.kcard-title {
+  display: block;
+  font-size: 15px;
+  font-weight: 700;
+  color: var(--text-primary);
+  line-height: 1.5;
+  margin-bottom: 6px;
+}
+.kcard-desc {
+  display: -webkit-box;
+  -webkit-box-orient: vertical;
+  -webkit-line-clamp: 2;
+  overflow: hidden;
+  font-size: 12px;
+  color: var(--text-tertiary);
+  line-height: 1.6;
+}
+.kcard-foot { margin-top: 8px; }
+.kcard-cta { font-size: 11px; font-weight: 600; color: var(--color-brand); }
+</style>

client/src/pages/trend/trend.vue

@@ -41,6 +41,18 @@
           {{ item.summary }}
         </text>
 
+        <!-- 人话解读：一句话说清 + 对你意味着什么 -->
+        <view class="card-plain" v-if="item.plainExplain">
+          <view class="plain-line">
+            <text class="plain-tag">人话</text>
+            <text class="plain-text">{{ item.plainExplain }}</text>
+          </view>
+          <view class="plain-line" v-if="item.takeAway">
+            <text class="plain-tag alt">对你</text>
+            <text class="plain-text">{{ item.takeAway }}</text>
+          </view>
+        </view>
+
         <!-- 底部信息 -->
         <view class="card-footer">
           <text class="card-date">{{ formatDate(item.newsDate) }}</text>
@@ -403,3 +415,29 @@ onShareAppMessage(() => {
   display: block;
 }
 </style>
+
+<style scoped>
+.card-plain {
+  margin-top: 8px;
+  background: var(--color-brand-bg);
+  border: 1px solid var(--glass-hover-border);
+  border-radius: 10px;
+  padding: 8px 10px;
+  display: flex;
+  flex-direction: column;
+  gap: 5px;
+}
+.plain-line { display: flex; align-items: flex-start; gap: 6px; }
+.plain-tag {
+  flex-shrink: 0;
+  font-size: 10px;
+  font-weight: 700;
+  color: #fff;
+  background: var(--color-brand);
+  border-radius: 5px;
+  padding: 1px 6px;
+  margin-top: 1px;
+}
+.plain-tag.alt { background: var(--dim3-color); }
+.plain-text { font-size: 12px; color: var(--text-primary); line-height: 1.6; }
+</style>

server/src/models/Trend.js

@@ -14,6 +14,9 @@ const TrendSchema = new Schema({
   },
   tags: [String],
   hot: { type: Boolean, default: false },
+  // 人话解读（AI 生成，治"看不懂AI新闻"的焦虑）
+  plainExplain: { type: String, default: '' },  // 一句话说清这是什么
+  takeAway: { type: String, default: '' },      // 对普通人意味着什么
   picked: { type: Boolean, default: false },
   newsDate: { type: Date, default: Date.now, index: true },
   viewCount: { type: Number, default: 0 },

server/src/routes/seo.js

@@ -66,7 +66,7 @@ router.get('/sitemap.xml', async (req, res) => {
 
 
 // ===== SSR 趋势页（SEO/GEO：真实内容直出，搜索引擎可收录） =====
-const TREND_PAGE_CSS = 'body{font-family:-apple-system,"PingFang SC",sans-serif;color:#1f2333;max-width:720px;margin:0 auto;padding:24px 18px;line-height:1.7}h1{font-size:22px}.meta{color:#9aa0b4;font-size:12px;margin:4px 0 20px}a{color:#5b5ff8;text-decoration:none}.item{padding:14px 0;border-bottom:1px solid #eef0f6}.item h2{font-size:16px;margin:0 0 6px}.item p{margin:0;font-size:13px;color:#6b7080}.item .m{font-size:11px;color:#a6abbb;margin-top:4px}.tag{display:inline-block;background:rgba(91,95,248,.1);color:#5b5ff8;border-radius:99px;padding:1px 8px;font-size:11px;margin-right:6px}.foot{margin-top:28px;color:#b6bac9;font-size:12px}'
+const TREND_PAGE_CSS = 'body{font-family:-apple-system,"PingFang SC",sans-serif;color:#1f2333;max-width:720px;margin:0 auto;padding:24px 18px;line-height:1.7}h1{font-size:22px}.meta{color:#9aa0b4;font-size:12px;margin:4px 0 20px}a{color:#5b5ff8;text-decoration:none}.item{padding:14px 0;border-bottom:1px solid #eef0f6}.item h2{font-size:16px;margin:0 0 6px}.item p{margin:0;font-size:13px;color:#6b7080}.item .m{font-size:11px;color:#a6abbb;margin-top:4px}.tag{display:inline-block;background:rgba(91,95,248,.1);color:#5b5ff8;border-radius:99px;padding:1px 8px;font-size:11px;margin-right:6px}.foot{margin-top:28px;color:#b6bac9;font-size:12px}.plain{background:#f5f5ff;border-left:3px solid #5b5ff8;padding:8px 12px;margin:8px 0;font-size:14px;color:#3a3f55}.plainbox{background:#f5f5ff;border-left:3px solid #5b5ff8;padding:10px 14px;border-radius:0 8px 8px 0;margin:14px 0}.plainbox p{margin:4px 0;font-size:14px;color:#3a3f55}'
 
 router.get('/trends', async (req, res) => {
   const o = origin(req)
@@ -76,6 +76,7 @@ router.get('/trends', async (req, res) => {
     <div class="item">
       <h2><a href="${o}/trends/${t._id}">${esc(t.title)}</a></h2>
       ${t.summary ? `<p>${esc(String(t.summary).slice(0, 120))}</p>` : ''}
+      ${t.plainExplain ? `<p class="plain"><b>人话：</b>${esc(t.plainExplain)}${t.takeAway ? `　<b>对你：</b>${esc(t.takeAway)}` : ''}</p>` : ''}
       <div class="m"><span class="tag">${esc(t.category || '资讯')}</span>${esc(t.source || '')} · ${(t.newsDate || t.createdAt || '').toString().slice(0, 10)}</div>
     </div>`).join('')
   res.type('html').send(`<!doctype html><html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1">
@@ -104,6 +105,7 @@ router.get('/trends/:id', async (req, res) => {
 <h1>${esc(t.title)}</h1>
 <div class="meta">${esc(t.source || '')} · ${(t.newsDate || t.createdAt || '').toString().slice(0, 10)}</div>
 ${t.summary ? `<p>${esc(t.summary)}</p>` : ''}
+${t.plainExplain ? `<div class="plainbox"><p><b>💡 一句话说清：</b>${esc(t.plainExplain)}</p>${t.takeAway ? `<p><b>🎯 对你意味着：</b>${esc(t.takeAway)}</p>` : ''}</div>` : ''}
 ${t.body ? `<div>${esc(t.body).split('\n').map((p) => `<p>${p}</p>`).join('')}</div>` : ''}
 ${t.sourceUrl ? `<p><a href="${esc(t.sourceUrl)}" rel="noopener nofollow" target="_blank">阅读原文 →</a></p>` : ''}
 <div class="foot"><a href="/trends">← 更多 AI 趋势</a> · © 宇之然</div>

server/src/scripts/update-trends.js

@@ -189,6 +189,33 @@ async function callAI(messages, maxTokens = 1024) {
   return '';
 }
 
+/** 人话解读：每条趋势生成"一句话说清 + 对普通人意味着什么"（治 AI 焦虑的核心价值层） */
+async function explainItems(items) {
+  const targets = items.filter(i => i.title && !i.plainExplain).slice(0, 14);
+  if (targets.length === 0) return items;
+  console.log(`  → 生成人话解读 ${targets.length} 条...`);
+  for (const item of targets) {
+    const prompt = `你是"维度精灵"，帮普通上班族看懂 AI 新闻。基于下面这条资讯，输出 JSON（只输出 JSON）：
+{"plainExplain":"用一句大白话说清这条资讯讲的是什么，30字内，不用术语","takeAway":"这对普通人意味着什么/该注意什么，一句行动向的话，30字内"}
+
+资讯标题：${item.title}
+${item.summary ? '摘要：' + String(item.summary).slice(0, 200) : ''}`;
+    const out = await callAI([{ role: 'user', content: prompt }], 300);
+    const m = out.match(/\{[\s\S]*?\}/);
+    if (m) {
+      try {
+        const j = JSON.parse(m[0]);
+        if (j.plainExplain) item.plainExplain = String(j.plainExplain).slice(0, 60);
+        if (j.takeAway) item.takeAway = String(j.takeAway).slice(0, 60);
+      } catch (e) { /* 解析失败留空，前端回退只显示标题 */ }
+    }
+    await new Promise(r => setTimeout(r, 300));
+  }
+  const ok = items.filter(i => i.plainExplain).length;
+  console.log(`  ✓ 人话解读完成 ${ok}/${targets.length}`);
+  return items;
+}
+
 /** 翻译英文内容到中文 */
 async function translateItems(items) {
   const needTranslate = items.filter(i => !hasChinese(i.title));
@@ -342,6 +369,9 @@ async function main() {
     console.log(`  ✓ 中文保底补充: ${need} 条`);
   }
 
+  // AI 人话解读（失败不阻断采集，字段留空前端自动回退）
+  try { await explainItems(items); } catch (e) { console.log('  ⚠ 人话解读失败:', e.message); }
+
   // 全量刷新：清空旧数据（避免残留英文 / 测试数据）
   await Trend.deleteMany({});