diff --git a/scripts/bot-activity.mjs b/scripts/bot-activity.mjs
index 1c6144d..eda80d8 100644
--- a/scripts/bot-activity.mjs
+++ b/scripts/bot-activity.mjs
@@ -197,7 +197,7 @@ function buildPasserbyTopicPrompt(bot, forumName, forumDescription, newsItems) {
   const p = bot.personality;
   const newsText = newsItems.length > 0
     ? newsItems.map((n, i) => `${i + 1}. [${n.pubDate || "近期"}] ${n.title}`).join("\n")
-    : "(当前无实时新闻，请根据你的角色知识和行业常识，提出一个结合当前季节/月份/年份背景的时效性强的话题。注意话题中必须体现当前时间背景，不能看起来像旧帖子)";
+    : `(搜索不到实时新闻，请充分利用DeepSeek知识库中截至2025年6月的最新行业信息。今天是${today}，你必须让话题看起来像是今天或最近几天发生的。可以提及：今年发生的重大事件、近几个月出台的新政策、当前季节性的行业趋势、最近热门的讨论。在你的发言中自然地加入时间锚点，比如"上个月刚出来的…"、"最近大家都在说…"、"这个月的数据显示…"等，让读者第一眼就感受到这是当前的话题而不是老帖)`;
 
   const today = new Date().toLocaleDateString("zh-CN", { year: "numeric", month: "long", day: "numeric" });
   const passerbyType = p.passerbyType || "observer";
diff --git a/scripts/install-cron.sh b/scripts/install-cron.sh
index c857a81..e132086 100644
--- a/scripts/install-cron.sh
+++ b/scripts/install-cron.sh
@@ -14,10 +14,8 @@ echo "✅ 日志目录已创建: $PROJECT_DIR/logs/"
 chmod +x "$PROJECT_DIR/scripts/cron-wrapper.sh"
 echo "✅ cron-wrapper.sh 已加执行权限"
 
-# 写入 crontab
-crontab -l 2>/dev/null | grep -v "zhuiguang" > /tmp/cron-temp 2>/dev/null || true
-
-cat >> /tmp/cron-temp << 'CRONEOF'
+# 直接写入crontab（覆盖模式）
+cat > /tmp/cron-temp << 'CRONEOF'
 
 # ========== 追光AI 定时任务 ==========
 # 使用 cron-wrapper.sh 统一入口（自动加载 .env）
@@ -44,6 +42,9 @@ PROJECT="/home/ubuntu/zhuiguang-ai"
 
 # 每天早上8:00 新闻推送到社区版块
 0 8 * * * bash $WRAPPER task7 $PROJECT/scripts/task7-news-to-community.mjs
+
+# 数字人bot活动引擎（每整点运行，9:00-23:00共15轮/天，每轮3帖）
+0 9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 * * * bash $WRAPPER bot-activity $PROJECT/scripts/bot-activity.mjs
 CRONEOF
 
 crontab /tmp/cron-temp
@@ -64,4 +65,5 @@ echo "  05:00 - Task4 发现AI技能"
 echo "  06:00 - Task1 发现AI工具"
 echo "  07:30 - 生成AI日报"
 echo "  08:00 - Task7 新闻→社区"
+echo "  09-23  - 数字人bot活动引擎（每小时1轮）"
 echo "========================================"
\ No newline at end of file
diff --git a/scripts/task7-news-to-community.mjs b/scripts/task7-news-to-community.mjs
index 3226d4c..48489c4 100644
--- a/scripts/task7-news-to-community.mjs
+++ b/scripts/task7-news-to-community.mjs
@@ -27,18 +27,18 @@ function ensureUniqueSlug(title) {
 }
 
 const CATEGORY_MAP = {
-  "产品发布": "ai-tools",
-  "product": "ai-tools",
-  "融资投资": "ai-news",
-  "business": "ai-news",
-  "技术突破": "tech",
-  "model": "tech",
-  "政策法规": "ai-news",
-  "policy": "ai-news",
-  "开源项目": "tech",
-  "opensource": "tech",
-  "行业事件": "ai-news",
-  "insight": "discuss",
+  "产品发布": "ai-tools-app",
+  "product": "ai-tools-app",
+  "融资投资": "ai-startup-forum",
+  "business": "ai-startup-forum",
+  "技术突破": "ai-llm",
+  "model": "ai-llm",
+  "政策法规": "ai-startup-forum",
+  "policy": "ai-startup-forum",
+  "开源项目": "ai-llm",
+  "opensource": "ai-llm",
+  "行业事件": "ai-startup-forum",
+  "insight": "ai-startup-forum",
 };
 
 async function main() {
@@ -89,7 +89,7 @@ async function main() {
 
   const forumCategories = await prisma.forumCategory.findMany({
     where: {
-      slug: { in: ["ai-tools", "ai-news", "tech", "discuss"] },
+      slug: { in: ["ai-tools-app", "ai-startup-forum", "ai-llm"] },
     },
   });
   const categoryBySlug = {};
@@ -98,7 +98,7 @@ async function main() {
   }
   console.log(`${ts()} 📂 已加载${forumCategories.length}个社区板块: ${Object.keys(categoryBySlug).join(", ")}`);
 
-  const requiredSlugs = ["ai-tools", "ai-news", "tech", "discuss"];
+  const requiredSlugs = ["ai-tools-app", "ai-startup-forum", "ai-llm"];
   for (const slug of requiredSlugs) {
     if (!categoryBySlug[slug]) {
       throw new Error(`社区板块不存在: ${slug}，请先在管理后台创建社区分类`);