diff --git a/content.js b/content.js
index 07ce1a7..3407626 100644
--- a/content.js
+++ b/content.js
@@ -960,25 +960,41 @@
       step("[" + (task.index + 1) + "/" + task.queue.length + "] " + video.title.slice(0, 30));
       const text = video.text || pickTemplate(video.title, cfg.keyword);
       const SRC_LABEL = { custom: "自定义", ai: "AI", tpl: "模板" };
-      step("评论[" + (SRC_LABEL[video.src] || "模板") + "]：" + text.slice(0, 30) + (text.length > 30 ? "…" : ""));
+      // 发送内容三选一：comment=只评论 / dm=只发私信不发评论 / both=评论+私信
+      const what = ["comment", "dm", "both"].indexOf(cfg.sendWhat) >= 0 ? cfg.sendWhat : "comment";
+      const doComment = (what === "comment" || what === "both");
+      const doDm = (what === "dm" || what === "both");
 
-      const r = await sendOne(video, text, cfg.sendMode !== "api");
-      if (r.stopped) { finish(task, false, "已手动停止"); return; }
-      if (r.fatal) { finish(task, false, r.fatal); return; }
+      if (doComment) {
+        step("评论[" + (SRC_LABEL[video.src] || "模板") + "]：" + text.slice(0, 30) + (text.length > 30 ? "…" : ""));
 
-      if (r.ok) {
-        step(r.verified ? "✅ 评论成功" : "⚠️ 已发送但未在页面确认，记为已评论", r.verified ? "ok" : "fail");
-        await recordOne(task, video, text, true);
+        const r = await sendOne(video, text, cfg.sendMode !== "api");
+        if (r.stopped) { finish(task, false, "已手动停止"); return; }
+        if (r.fatal) { finish(task, false, r.fatal); return; }
+
+        if (r.ok) {
+          step(r.verified ? "✅ 评论成功" : "⚠️ 已发送但未在页面确认，记为已评论", r.verified ? "ok" : "fail");
+          await recordOne(task, video, text, true);
+        } else {
+          step("❌ 失败：" + r.error, "fail");
+          await recordOne(task, video, text, false);
+        }
       } else {
-        step("❌ 失败：" + r.error, "fail");
-        await recordOne(task, video, text, false);
+        step("本条不发评论（发送内容=只发私信）");
       }
 
-      // 私信（可选，评论后对本视频评论区用户发送；风控更严，间隔更长）
-      if (cfg.dmEnabled && !stopRequested()) {
+      // 私信：对本视频评论区里发过评论的人发送；风控更严，间隔更长
+      let dmBefore = task.dmSent || 0; // 本视频发送前的累计数，用于算增量
+      if (doDm && !stopRequested()) {
         await runDmStep(task, video);
       }
 
+      // 只发私信模式下也要记为「已处理」，否则下次会重复进同一视频
+      // 注意按「本视频的增量」判断，不能用累计数（否则前面发过就会误记后面没发的）
+      if (!doComment && (task.dmSent || 0) > dmBefore) {
+        await recordOne(task, video, text, true);
+      }
+
       task.index += 1;
 
       if (task.index < task.queue.length && !stopRequested()) {
diff --git a/manifest.json b/manifest.json
index 6b94030..834d433 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "B站评论助手",
-  "version": "1.7.1",
+  "version": "1.8.0",
   "description": "B站网页版关键词评论助手：按搜索关键词找视频，默认模拟真人（打开视频页、滚到评论区、逐字输入、点发布），也可快速API直发；支持下载当前页视频；带防重复记录、可中断执行与页面实时进度浮层。",
   "permissions": ["storage", "tabs", "scripting", "sidePanel", "downloads", "declarativeNetRequest"],
   "host_permissions": [
diff --git a/sidepanel.html b/sidepanel.html
index 53f1aa8..e5c455e 100644
--- a/sidepanel.html
+++ b/sidepanel.html
@@ -237,11 +237,20 @@
     <input type="number" id="minPlay" value="0" min="0">
     <span class="unit">次（0 = 不过滤）</span>
   </div>
-  <div id="dmBox" style="margin-top:10px;padding:9px 10px;border:1px dashed #d0a0a0;border-radius:8px;background:#fdf7f7">
-    <label style="display:flex;align-items:center;gap:6px;font-size:13px;font-weight:bold;color:#c0392b;cursor:pointer">
-      <input type="checkbox" id="dmEnabled"> ✉ 私信评论区用户（高风险，默认关闭）
-    </label>
-    <div id="dmDetail" style="display:none;margin-top:7px">
+  <div class="row" style="margin-top:8px">
+    <span class="unit">发送内容</span>
+    <select id="sendWhat" style="flex:1">
+      <option value="comment" selected>只发评论（默认）</option>
+      <option value="dm">只发私信，不发评论</option>
+      <option value="both">评论 + 私信</option>
+    </select>
+  </div>
+  <div id="dmBox" style="margin-top:8px;padding:9px 10px;border:1px dashed #d0a0a0;border-radius:8px;background:#fdf7f7;display:none">
+    <div style="font-size:12px;color:#7a5c00;background:#fff8e1;border:1px solid #ffe082;border-radius:4px;padding:5px 8px;line-height:1.55">
+      私信对象：<b>仅本视频评论区里发过评论的人</b>（不含UP主、不含没评论的路人）。<br>
+      同一用户<b>终身只发一条</b>，已发过的自动跳过。
+    </div>
+    <div style="margin-top:7px">
       <div class="row">
         <span class="unit">每个视频最多</span>
         <select id="dmCount">
diff --git a/sidepanel.js b/sidepanel.js
index 76d9864..0c6df43 100644
--- a/sidepanel.js
+++ b/sidepanel.js
@@ -14,11 +14,11 @@
     dlQuality: "80",
     maxN: 3,
     minPlay: 0,
-    dmEnabled: false,
+    sendWhat: "comment",
     dmCount: 2,
     dmText: ""
   };
-  const FIELDS = ["baseUrl", "apiKey", "model", "keyword", "order", "mode", "customText", "sendMode", "tid", "region", "dlQuality", "maxN", "minPlay", "dmEnabled", "dmCount", "dmText"];
+  const FIELDS = ["baseUrl", "apiKey", "model", "keyword", "order", "mode", "customText", "sendMode", "tid", "region", "dlQuality", "maxN", "minPlay", "sendWhat", "dmCount", "dmText"];
 
   let settings = Object.assign({}, DEFAULTS);
   let running = false;
@@ -73,9 +73,10 @@
   }
 
     function refreshDmVisibility() {
-    const cb = $("dmEnabled"), det = $("dmDetail");
-    if (!cb || !det) return;
-    det.style.display = cb.checked ? "block" : "none";
+    const sel = $("sendWhat"), box = $("dmBox");
+    if (!sel || !box) return;
+    // 选了「只发私信」或「评论+私信」才展开私信设置区
+    box.style.display = (sel.value === "dm" || sel.value === "both") ? "block" : "none";
   }
 
 function refreshCustomVisibility() {
@@ -339,7 +340,7 @@ function refreshCustomVisibility() {
           keyword: kw,
           maxN: Number(settings.maxN) || 3,
           minPlay: Number(settings.minPlay) || 0,
-          dmEnabled: settings.dmEnabled === true || settings.dmEnabled === "true",
+          sendWhat: ["comment", "dm", "both"].indexOf(settings.sendWhat) >= 0 ? settings.sendWhat : "comment",
           dmCount: Math.max(1, Math.min(5, Number(settings.dmCount) || 2)),
           dmText: String(settings.dmText || "").trim()
         }) });
@@ -583,7 +584,7 @@ function refreshCustomVisibility() {
           : (el.type === "number") ? (Number(el.value) || 0) : el.value;
         saveField(k, v);
         if (k === "mode") refreshCustomVisibility();
-        if (k === "dmEnabled") refreshDmVisibility();
+        if (k === "sendWhat") refreshDmVisibility();
         if (k === "mode" || k === "apiKey" || k === "baseUrl" || k === "model" || k === "customText") refreshModeWarn();
       });
       if (el.tagName === "TEXTAREA" || el.type === "text" || el.type === "password") {