diff --git a/src/components/subtitle/KeywordEffectsSettings.vue b/src/components/subtitle/KeywordEffectsSettings.vue
index 15d6f1a..75fa5cb 100644
--- a/src/components/subtitle/KeywordEffectsSettings.vue
+++ b/src/components/subtitle/KeywordEffectsSettings.vue
@@ -1,8 +1,24 @@
 <script setup>
-import { computed } from "vue";
+import { computed, ref } from "vue";
+import {
+  SUBTITLE_FONT_OPTIONS,
+  buildSubtitlePreviewBoxStyle,
+} from "../../config/subtitleStylePresets.js";
 
 const config = defineModel("config", { type: Object, required: true });
 
+const importInputRef = ref(null);
+const newGroupName = ref("");
+const editingGroupIndex = ref(-1);
+const keywordInputs = ref({});
+
+const renderModeOptions = [
+  { label: "内联字幕", value: "inline-emphasis" },
+  { label: "浮动特效", value: "floating" },
+];
+
+const builtinGroupNames = new Set(["行动词", "情感词", "描述词", "重点词/成语词"]);
+
 const enableKeywordEffects = computed({
   get: () => config.value.enableKeywordEffects !== false,
   set: (v) => {
@@ -17,7 +33,128 @@ const keywordRenderMode = computed({
   },
 });
 
-const groups = computed(() => config.value.keywordGroupsStyles || []);
+const groups = computed({
+  get: () => config.value.keywordGroupsStyles || [],
+  set: (value) => {
+    config.value.keywordGroupsStyles = value;
+  },
+});
+
+function ensureGroups() {
+  if (!Array.isArray(config.value.keywordGroupsStyles)) {
+    config.value.keywordGroupsStyles = [];
+  }
+  return config.value.keywordGroupsStyles;
+}
+
+function ensureStyleOverride(group) {
+  if (!group.styleOverride) {
+    group.styleOverride = {
+      fontName: config.value.subtitleStyle?.fontName || "胡晓波男神体",
+      fontSize: Math.max(Number(config.value.subtitleStyle?.fontSize) || 24, 24),
+      fontColor: group.color || "#FFFF00",
+      outlineColor: "#000000",
+      outlineWidth: 2,
+    };
+  }
+  if (!group.color) group.color = group.styleOverride.fontColor || "#1890ff";
+  return group.styleOverride;
+}
+
+function createGroup() {
+  const name = newGroupName.value.trim();
+  if (!name) return;
+  const list = ensureGroups();
+  list.push({
+    groupName: name,
+    description: `模板分组${name}`,
+    keywords: [],
+    styleOverride: {
+      fontName: config.value.subtitleStyle?.fontName || "胡晓波男神体",
+      fontSize: 24,
+      fontColor: "#FFFF00",
+      outlineColor: "#000000",
+      outlineWidth: 2,
+    },
+    effectId: null,
+    effectDuration: null,
+    color: "#1890ff",
+    soundEffectId: null,
+    soundEffectConfig: null,
+  });
+  newGroupName.value = "";
+  editingGroupIndex.value = list.length - 1;
+}
+
+function removeGroup(index) {
+  const group = groups.value[index];
+  if (!group || builtinGroupNames.has(group.groupName)) return;
+  if (!window.confirm(`确定删除分组「${group.groupName || `分组 ${index + 1}`}」？`)) {
+    return;
+  }
+  groups.value.splice(index, 1);
+  if (editingGroupIndex.value === index) editingGroupIndex.value = -1;
+}
+
+function groupKeywords(group) {
+  return group.keywords || group.words || [];
+}
+
+function addKeyword(group, index) {
+  const word = String(keywordInputs.value[index] || "").trim();
+  if (!word) return;
+  if (!Array.isArray(group.keywords)) group.keywords = groupKeywords(group).slice();
+  if (!group.keywords.includes(word)) group.keywords.push(word);
+  keywordInputs.value[index] = "";
+}
+
+function removeKeyword(group, keyword) {
+  group.keywords = groupKeywords(group).filter((item) => item !== keyword);
+}
+
+function groupPreviewStyle(group) {
+  return buildSubtitlePreviewBoxStyle({
+    ...(config.value.subtitleStyle || {}),
+    ...(group.styleOverride || {}),
+  });
+}
+
+function exportGroups() {
+  const blob = new Blob(
+    [
+      JSON.stringify(
+        {
+          version: "1.0.0",
+          exportedAt: new Date().toISOString(),
+          keywordGroupsStyles: groups.value,
+        },
+        null,
+        2,
+      ),
+    ],
+    { type: "application/json" },
+  );
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement("a");
+  a.href = url;
+  a.download = "keyword-groups-config.json";
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
+async function importGroups(event) {
+  const file = event.target.files?.[0];
+  event.target.value = "";
+  if (!file) return;
+  const data = JSON.parse(await file.text());
+  const list = data.keywordGroupsStyles || data.groups || data;
+  if (!Array.isArray(list)) {
+    window.alert("无效的关键词分组配置");
+    return;
+  }
+  groups.value = list;
+  editingGroupIndex.value = -1;
+}
 </script>
 
 <template>
@@ -49,10 +186,7 @@ const groups = computed(() => config.value.keywordGroupsStyles || []);
           </div>
           <SelectButton
             v-model="keywordRenderMode"
-            :options="[
-              { label: '内联字幕', value: 'inline-emphasis' },
-              { label: '浮动特效', value: 'floating' },
-            ]"
+            :options="renderModeOptions"
             option-label="label"
             option-value="value"
             size="small"
@@ -80,23 +214,181 @@ const groups = computed(() => config.value.keywordGroupsStyles || []);
       </div>
 
       <div class="rounded-lg border border-slate-600/40 bg-slate-900/40 p-3">
-        <h6 class="mb-3 text-sm font-medium text-slate-200">关键词分组（{{ groups.length }}）</h6>
-        <div class="max-h-48 space-y-2 overflow-y-auto">
+        <h6 class="mb-3 text-sm font-medium text-slate-200">关键词分组管理</h6>
+
+        <div class="mb-4 rounded bg-slate-800/60 p-3">
+          <div class="flex gap-2">
+            <InputText
+              v-model="newGroupName"
+              size="small"
+              class="flex-1"
+              placeholder="输入分组名称"
+              @keydown.enter="createGroup"
+            />
+            <Button label="创建分组" size="small" @click="createGroup" />
+          </div>
+        </div>
+
+        <div class="space-y-3">
+          <div class="text-sm font-medium text-slate-200">已有分组 ({{ groups.length }})</div>
+
           <div
             v-for="(group, i) in groups"
-            :key="i"
-            class="rounded border border-slate-600/30 bg-slate-800/50 p-2 text-sm"
-            :style="{ borderLeftWidth: '4px', borderLeftColor: group.color || '#3b82f6' }"
+            :key="`${group.groupName || 'group'}-${i}`"
+            class="rounded-lg border border-slate-600/40 bg-slate-800/50 p-3"
+            :style="{ borderLeftWidth: '4px', borderLeftColor: group.color || '#1890ff' }"
           >
-            <div class="font-medium text-slate-200">{{ group.groupName || `分组 ${i + 1}` }}</div>
-            <div v-if="group.styleOverride?.fontName" class="mt-1 text-xs text-slate-400">
-              强调字体：{{ group.styleOverride.fontName }} ·
-              {{ group.styleOverride.fontColor || group.color }}
+            <div class="mb-2 flex items-start justify-between gap-2">
+              <div class="min-w-0 flex-1">
+                <div class="flex items-center gap-2 font-medium text-slate-100">
+                  <span>{{ group.groupName || `分组 ${i + 1}` }}</span>
+                </div>
+                <InputText
+                  v-model="group.description"
+                  size="small"
+                  class="mt-2 w-full"
+                  placeholder="分组描述"
+                />
+              </div>
+              <div class="flex shrink-0 gap-2">
+                <Button
+                  :label="editingGroupIndex === i ? '收起样式' : '编辑样式'"
+                  size="small"
+                  text
+                  @click="
+                    ensureStyleOverride(group);
+                    editingGroupIndex = editingGroupIndex === i ? -1 : i;
+                  "
+                />
+                <Button
+                  v-if="!builtinGroupNames.has(group.groupName)"
+                  label="删除"
+                  size="small"
+                  text
+                  severity="danger"
+                  @click="removeGroup(i)"
+                />
+              </div>
+            </div>
+
+            <div class="mb-2">
+              <div class="mb-1 text-xs text-slate-400">关键词 ({{ groupKeywords(group).length }})</div>
+              <div v-if="groupKeywords(group).length" class="flex flex-wrap gap-1">
+                <Tag
+                  v-for="keyword in groupKeywords(group)"
+                  :key="keyword"
+                  :value="keyword"
+                  rounded
+                  :style="{
+                    backgroundColor: group.color || '#1890ff',
+                    color: '#fff',
+                    border: 'none',
+                  }"
+                  class="cursor-pointer"
+                  @click="removeKeyword(group, keyword)"
+                />
+              </div>
+              <div v-else class="text-xs text-slate-500">暂无关键词</div>
+              <div class="mt-2 flex gap-2">
+                <InputText
+                  v-model="keywordInputs[i]"
+                  size="small"
+                  class="flex-1"
+                  placeholder="添加关键词"
+                  @keydown.enter="addKeyword(group, i)"
+                />
+                <Button label="添加" size="small" severity="secondary" @click="addKeyword(group, i)" />
+              </div>
+            </div>
+
+            <div
+              v-if="editingGroupIndex === i"
+              class="mt-3 rounded-lg border border-slate-600/40 bg-white p-3 text-slate-800"
+            >
+              <div class="mb-3 text-sm font-medium">分组样式</div>
+              <div class="grid grid-cols-2 gap-3">
+                <div class="col-span-2">
+                  <label class="mb-1 block text-xs text-slate-500">字体</label>
+                  <Select
+                    v-model="group.styleOverride.fontName"
+                    :options="SUBTITLE_FONT_OPTIONS"
+                    option-label="label"
+                    option-value="value"
+                    class="w-full"
+                    size="small"
+                  />
+                </div>
+                <div>
+                  <label class="mb-1 block text-xs text-slate-500">字体大小</label>
+                  <InputNumber
+                    v-model="group.styleOverride.fontSize"
+                    :min="12"
+                    :max="120"
+                    class="w-full"
+                    size="small"
+                  />
+                </div>
+                <div>
+                  <label class="mb-1 block text-xs text-slate-500">标签颜色</label>
+                  <div class="flex items-center gap-2">
+                    <input v-model="group.color" type="color" class="h-8 w-10" />
+                    <InputText v-model="group.color" size="small" class="flex-1" />
+                  </div>
+                </div>
+                <div>
+                  <label class="mb-1 block text-xs text-slate-500">文字颜色</label>
+                  <div class="flex items-center gap-2">
+                    <input v-model="group.styleOverride.fontColor" type="color" class="h-8 w-10" />
+                    <InputText v-model="group.styleOverride.fontColor" size="small" class="flex-1" />
+                  </div>
+                </div>
+                <div>
+                  <label class="mb-1 block text-xs text-slate-500">描边颜色</label>
+                  <div class="flex items-center gap-2">
+                    <input v-model="group.styleOverride.outlineColor" type="color" class="h-8 w-10" />
+                    <InputText v-model="group.styleOverride.outlineColor" size="small" class="flex-1" />
+                  </div>
+                </div>
+                <div class="col-span-2">
+                  <label class="mb-1 block text-xs text-slate-500">描边宽度</label>
+                  <div class="flex items-center gap-2">
+                    <Slider
+                      v-model="group.styleOverride.outlineWidth"
+                      :min="0"
+                      :max="10"
+                      class="flex-1"
+                    />
+                    <span class="w-10 text-right font-mono text-sm">
+                      {{ group.styleOverride.outlineWidth }}px
+                    </span>
+                  </div>
+                </div>
+              </div>
+              <div class="mt-3 rounded bg-slate-800 p-3 text-center">
+                <span :style="groupPreviewStyle(group)">示例关键词</span>
+              </div>
             </div>
           </div>
         </div>
-        <p class="mt-2 text-xs text-slate-500">分组样式编辑与关键词标记将在后续版本开放</p>
+
+        <div class="mt-4 flex gap-2">
+          <Button label="导出配置" size="small" severity="secondary" @click="exportGroups" />
+          <Button
+            label="导入配置"
+            size="small"
+            severity="secondary"
+            @click="importInputRef?.click()"
+          />
+        </div>
       </div>
     </div>
+
+    <input
+      ref="importInputRef"
+      type="file"
+      accept="application/json,.json"
+      class="hidden"
+      @change="importGroups"
+    />
   </div>
 </template>
diff --git a/src/components/subtitle/SubtitleStyleSelector.vue b/src/components/subtitle/SubtitleStyleSelector.vue
index 516f3fe..93ded31 100644
--- a/src/components/subtitle/SubtitleStyleSelector.vue
+++ b/src/components/subtitle/SubtitleStyleSelector.vue
@@ -58,6 +58,13 @@ const noBackground = computed({
   },
 });
 
+const shadowBlurPreview = computed({
+  get: () => subtitleStyle.value?.shadowBlur ?? 4,
+  set: (value) => {
+    if (subtitleStyle.value) subtitleStyle.value.shadowBlur = value;
+  },
+});
+
 const previewStyle = computed(() =>
   buildSubtitlePreviewBoxStyle(subtitleStyle.value),
 );
@@ -189,6 +196,24 @@ function applyPreset(preset) {
               <InputText v-model="subtitleStyle.shadowColor" size="small" class="flex-1" />
             </div>
           </div>
+          <div class="col-span-2">
+            <label class="mb-2 block text-sm text-slate-400">阴影模糊（仅预览有效）</label>
+            <div class="flex items-center gap-2">
+              <Slider
+                v-model="shadowBlurPreview"
+                :min="0"
+                :max="20"
+                class="flex-1"
+                disabled
+              />
+              <span class="w-10 text-right font-mono text-sm text-slate-400">
+                {{ shadowBlurPreview }}px
+              </span>
+            </div>
+            <p class="mt-1 text-xs text-slate-400">
+              注：FFmpeg 不支持阴影模糊，实际视频中仅显示阴影偏移效果
+            </p>
+          </div>
         </template>
         <div class="col-span-2">
           <label class="mb-2 block text-sm text-slate-600">背景颜色</label>
diff --git a/src/components/subtitle/TitleLineStyleEditor.vue b/src/components/subtitle/TitleLineStyleEditor.vue
index e3381ae..e148230 100644
--- a/src/components/subtitle/TitleLineStyleEditor.vue
+++ b/src/components/subtitle/TitleLineStyleEditor.vue
@@ -20,6 +20,13 @@ const enableBackground = computed({
   },
 });
 
+const backgroundOpacityPercent = computed({
+  get: () => Math.round((Number(line.value.backgroundOpacity) || 0) * 100),
+  set: (value) => {
+    line.value.backgroundOpacity = Math.max(0, Math.min(100, Number(value) || 0)) / 100;
+  },
+});
+
 const enableShadow = computed({
   get: () => (line.value.shadowOffset ?? 0) > 0,
   set: (on) => {
@@ -44,7 +51,7 @@ const previewStyle = computed(() => {
   }
   return {
     fontFamily: line.value.fontName ? `'${line.value.fontName}'` : "优设标题黑",
-    fontSize: `${Math.min(Number(line.value.fontSize) || 80, 48)}px`,
+    fontSize: `${Number(line.value.fontSize) || 80}px`,
     color: line.value.fontColor || "#fff",
     backgroundColor:
       enableBackground.value && line.value.backgroundColor !== "transparent"
@@ -52,6 +59,8 @@ const previewStyle = computed(() => {
         : "transparent",
     textShadow: shadows.join(", ") || "none",
     padding: "8px 16px",
+    display: "inline-block",
+    lineHeight: 1.12,
   };
 });
 </script>
@@ -108,6 +117,22 @@ const previewStyle = computed(() => {
         <Checkbox v-model="enableBackground" binary />
         启用背景
       </label>
+      <div v-if="enableBackground" class="mt-2 grid grid-cols-2 gap-3">
+        <div>
+          <label class="mb-1 block text-xs text-slate-500">背景颜色</label>
+          <div class="flex items-center gap-2">
+            <input v-model="line.backgroundColor" type="color" class="h-8 w-10" />
+            <InputText v-model="line.backgroundColor" size="small" class="flex-1" />
+          </div>
+        </div>
+        <div>
+          <label class="mb-1 block text-xs text-slate-500">背景透明度</label>
+          <div class="flex items-center gap-2">
+            <Slider v-model="backgroundOpacityPercent" :min="0" :max="100" class="flex-1" />
+            <span class="w-10 text-right text-xs">{{ backgroundOpacityPercent }}%</span>
+          </div>
+        </div>
+      </div>
     </div>
 
     <div>
@@ -116,17 +141,26 @@ const previewStyle = computed(() => {
         <Checkbox v-model="enableShadow" binary />
         启用阴影
       </label>
-      <div v-if="enableShadow" class="flex items-center gap-2">
-        <label class="text-xs text-slate-500">阴影偏移</label>
-        <Slider v-model="line.shadowOffset" :min="1" :max="10" class="flex-1" />
-        <input v-model="line.shadowColor" type="color" class="h-8 w-10" />
+      <div v-if="enableShadow" class="space-y-2">
+        <div class="flex items-center gap-2">
+          <label class="text-xs text-slate-500">阴影偏移</label>
+          <Slider v-model="line.shadowOffset" :min="1" :max="10" class="flex-1" />
+          <span class="w-8 text-right text-xs">{{ line.shadowOffset }}</span>
+        </div>
+        <div class="flex items-center gap-2">
+          <label class="text-xs text-slate-500">阴影颜色</label>
+          <input v-model="line.shadowColor" type="color" class="h-8 w-10" />
+          <InputText v-model="line.shadowColor" size="small" class="flex-1" />
+        </div>
       </div>
     </div>
 
     <div>
       <div class="mb-2 text-sm font-medium text-slate-700">效果预览</div>
-      <div class="rounded bg-slate-100 py-4 text-center" :style="previewStyle">
-        {{ line.text || "标题文字" }}
+      <div class="overflow-hidden rounded bg-slate-100 py-4 text-center">
+        <div :style="previewStyle">
+          {{ line.text || "标题文字" }}
+        </div>
       </div>
     </div>
   </div>
diff --git a/src/components/subtitle/TitleSubtitleSettings.vue b/src/components/subtitle/TitleSubtitleSettings.vue
index 210caba..0415126 100644
--- a/src/components/subtitle/TitleSubtitleSettings.vue
+++ b/src/components/subtitle/TitleSubtitleSettings.vue
@@ -1,5 +1,5 @@
 <script setup>
-import { computed, ref } from "vue";
+import { computed, ref, watch } from "vue";
 import TitleLineStyleEditor from "./TitleLineStyleEditor.vue";
 import { syncTitleLinesFromReference } from "../../utils/subtitleTemplateDraft.js";
 
@@ -37,6 +37,19 @@ function reloadFromReference() {
 }
 
 const linePreviews = computed(() => titleConfig.value?.lines || []);
+
+const maxCharMarks = [8, 12, 15, 20];
+
+function markLeft(value) {
+  return `${((value - 8) / (20 - 8)) * 100}%`;
+}
+
+watch(
+  () => titleConfig.value?.maxCharsPerLine,
+  () => {
+    reloadFromReference();
+  },
+);
 </script>
 
 <template>
@@ -57,36 +70,48 @@ const linePreviews = computed(() => titleConfig.value?.lines || []);
         </div>
       </div>
 
-      <div class="grid gap-4 md:grid-cols-2">
-        <div>
-          <label class="mb-1 block text-xs text-slate-400">每行最大字符数</label>
-          <InputNumber
-            v-model="titleConfig.maxCharsPerLine"
-            :min="8"
-            :max="20"
-            size="small"
-            class="w-full"
-          />
+      <div class="space-y-4">
+        <div class="flex items-center gap-3">
+          <div class="w-28 shrink-0 text-sm text-slate-300">每行最大字符数：</div>
+          <div class="relative flex-1 pb-5">
+            <Slider
+              v-model="titleConfig.maxCharsPerLine"
+              :min="8"
+              :max="20"
+              :step="1"
+              class="w-full"
+            />
+            <div class="pointer-events-none absolute inset-x-0 top-6 text-xs text-slate-500">
+              <span
+                v-for="mark in maxCharMarks"
+                :key="mark"
+                class="absolute -translate-x-1/2"
+                :style="{ left: markLeft(mark) }"
+              >
+                {{ mark }}
+              </span>
+            </div>
+          </div>
         </div>
-        <div>
-          <label class="mb-1 block text-xs text-slate-400">行间距（%）</label>
+        <div class="flex items-center gap-3">
+          <div class="w-28 shrink-0 text-sm text-slate-300">行间距（%）：</div>
           <InputNumber
             v-model="titleConfig.lineSpacingPercent"
             :min="3"
             :max="15"
-            size="small"
-            class="w-full"
+            class="w-32"
           />
+          <span class="text-xs text-slate-500">相对于视频高度</span>
         </div>
-        <div>
-          <label class="mb-1 block text-xs text-slate-400">顶部边距（%）</label>
+        <div class="flex items-center gap-3">
+          <div class="w-28 shrink-0 text-sm text-slate-300">顶部边距（%）：</div>
           <InputNumber
             v-model="titleConfig.topMarginPercent"
             :min="2"
             :max="20"
-            size="small"
-            class="w-full"
+            class="w-32"
           />
+          <span class="text-xs text-slate-500">相对于视频高度</span>
         </div>
       </div>