diff --git a/web/src/views/LiveRoom.vue b/web/src/views/LiveRoom.vue
index 872d36e..3f12509 100644
--- a/web/src/views/LiveRoom.vue
+++ b/web/src/views/LiveRoom.vue
@@ -18,53 +18,61 @@
           </select>
         </div>
         <p class="live-watch-status">{{ watchStatus }}</p>
-        <div class="live-video-wrap">
-          <video
-            ref="watchVideoRef"
-            class="live-room-video live-room-video--watch live-room-video--contain"
-            playsinline
-            autoplay
-          ></video>
-          <div class="live-dm-layer" aria-hidden="true">
-            <div
-              v-for="d in dmItems"
-              :key="d.id"
-              class="live-dm-line"
-              :style="{ top: d.top + '%' }"
-            >
-              <span class="live-dm-from">{{ d.from }}：</span>{{ d.text }}
+        <div ref="liveStageRef" class="live-stage">
+          <div class="live-stage-media">
+            <div class="live-video-wrap">
+              <video
+                ref="watchVideoRef"
+                class="live-room-video live-room-video--watch live-room-video--contain"
+                playsinline
+                autoplay
+              ></video>
+              <div class="live-dm-layer" aria-hidden="true">
+                <div
+                  v-for="d in dmItems"
+                  :key="d.id"
+                  class="live-dm-line"
+                  :style="{ top: d.top + '%' }"
+                >
+                  <span class="live-dm-from">{{ d.from }}：</span>{{ d.text }}
+                </div>
+              </div>
+              <div class="live-video-toolbar" role="toolbar" aria-label="播放控制">
+                <button type="button" class="live-video-toolbtn" @click="unmuteAndPlay">开声音</button>
+                <button type="button" class="live-video-toolbtn" @click="toggleStageFullscreen">
+                  {{ stageFullscreen ? '退出全屏' : '全屏' }}
+                </button>
+              </div>
             </div>
           </div>
-          <div class="live-video-toolbar" role="toolbar" aria-label="播放控制">
-            <button type="button" class="live-video-toolbtn" @click="unmuteAndPlay">开声音</button>
-            <button type="button" class="live-video-toolbtn" @click="toggleVideoFullscreen">全屏</button>
+          <div class="live-stage-footer">
+            <div class="live-dm-auth-row">
+              <template v-if="dmLoggedIn">
+                <span class="live-dm-user">已登录：{{ dmDisplayName }}</span>
+                <button type="button" class="live-dm-auth-btn" @click="logoutDmUser">退出</button>
+              </template>
+              <template v-else>
+                <router-link class="live-dm-auth-link" to="/live/login">登录发弹幕</router-link>
+                <span class="live-dm-auth-sep">·</span>
+                <router-link class="live-dm-auth-link" to="/live/register">注册</router-link>
+              </template>
+            </div>
+            <div class="live-dm-bar">
+              <input
+                v-model="dmDraft"
+                class="live-dm-input"
+                type="text"
+                maxlength="120"
+                :placeholder="dmLoggedIn ? '发条弹幕…' : '登录后可发弹幕（仍可观看）'"
+                autocomplete="off"
+                :disabled="!dmLoggedIn"
+                @keydown.enter.prevent="sendDm"
+              />
+              <button type="button" class="live-dm-send" :disabled="!dmLoggedIn" @click="sendDm">发送</button>
+            </div>
+            <p v-if="dmHint" class="live-dm-hint">{{ dmHint }}</p>
           </div>
         </div>
-        <div class="live-dm-auth-row">
-          <template v-if="dmLoggedIn">
-            <span class="live-dm-user">已登录：{{ dmDisplayName }}</span>
-            <button type="button" class="live-dm-auth-btn" @click="logoutDmUser">退出</button>
-          </template>
-          <template v-else>
-            <router-link class="live-dm-auth-link" to="/live/login">登录发弹幕</router-link>
-            <span class="live-dm-auth-sep">·</span>
-            <router-link class="live-dm-auth-link" to="/live/register">注册</router-link>
-          </template>
-        </div>
-        <div class="live-dm-bar">
-          <input
-            v-model="dmDraft"
-            class="live-dm-input"
-            type="text"
-            maxlength="120"
-            :placeholder="dmLoggedIn ? '发条弹幕…' : '登录后可发弹幕（仍可观看）'"
-            autocomplete="off"
-            :disabled="!dmLoggedIn"
-            @keydown.enter.prevent="sendDm"
-          />
-          <button type="button" class="live-dm-send" :disabled="!dmLoggedIn" @click="sendDm">发送</button>
-        </div>
-        <p v-if="dmHint" class="live-dm-hint">{{ dmHint }}</p>
       </section>
 
       <section class="live-block live-block--divider" aria-label="外链直播间">
@@ -92,6 +100,8 @@ import { startViewing, liveDanmakuWsURL } from '../utils/liveWebRTC'
 import { getSiteDmToken, getSiteDmUsername, clearSiteDmSession } from '../utils/siteUserAuth'
 
 const watchVideoRef = ref(null)
+const liveStageRef = ref(null)
+const stageFullscreen = ref(false)
 const rawLiveUrl = ref('')
 const pageTitle = ref('视频直播')
 const watchStatus = ref('正在检测本站直播…')
@@ -177,20 +187,55 @@ function unmuteAndPlay() {
   v.play().catch(() => {})
 }
 
-function toggleVideoFullscreen() {
+function syncStageFullscreenFlag() {
+  const d = document
+  const el = liveStageRef.value
+  if (!el) {
+    stageFullscreen.value = false
+    return
+  }
+  stageFullscreen.value =
+    d.fullscreenElement === el || d.webkitFullscreenElement === el
+}
+
+/** 整页舞台全屏：含画面 + 底部登录与发弹幕（非仅 video，避免全屏后看不到输入框） */
+function toggleStageFullscreen() {
+  const stage = liveStageRef.value
   const v = watchVideoRef.value
-  if (!v) return
+  if (!stage) return
   const doc = document
-  if (doc.fullscreenElement || doc.webkitFullscreenElement) {
+  const fsEl = doc.fullscreenElement || doc.webkitFullscreenElement
+  if (fsEl) {
     doc.exitFullscreen?.() || doc.webkitExitFullscreen?.()
     return
   }
-  if (typeof v.webkitEnterFullscreen === 'function') {
-    v.webkitEnterFullscreen()
+  if (typeof stage.requestFullscreen === 'function') {
+    Promise.resolve(stage.requestFullscreen())
+      .then(() => syncStageFullscreenFlag())
+      .catch(() => {
+        if (typeof stage.webkitRequestFullscreen === 'function') {
+          try {
+            stage.webkitRequestFullscreen()
+          } catch (_) {
+            if (v && typeof v.webkitEnterFullscreen === 'function') v.webkitEnterFullscreen()
+          }
+        } else if (v && typeof v.webkitEnterFullscreen === 'function') {
+          v.webkitEnterFullscreen()
+        }
+      })
     return
   }
-  const el = v
-  el.requestFullscreen?.() || el.webkitRequestFullscreen?.()
+  if (typeof stage.webkitRequestFullscreen === 'function') {
+    try {
+      stage.webkitRequestFullscreen()
+    } catch (_) {
+      if (v && typeof v.webkitEnterFullscreen === 'function') v.webkitEnterFullscreen()
+    }
+    return
+  }
+  if (v && typeof v.webkitEnterFullscreen === 'function') {
+    v.webkitEnterFullscreen()
+  }
 }
 
 function pushDmLine(text, fromRaw) {
@@ -327,6 +372,8 @@ function sendDm() {
 
 onMounted(async () => {
   dmIntentionalClose = false
+  document.addEventListener('fullscreenchange', syncStageFullscreenFlag)
+  document.addEventListener('webkitfullscreenchange', syncStageFullscreenFlag)
   loadCaptureQualityPref()
   loadHomepage()
   await nextTick()
@@ -340,6 +387,8 @@ onMounted(async () => {
 })
 
 onUnmounted(() => {
+  document.removeEventListener('fullscreenchange', syncStageFullscreenFlag)
+  document.removeEventListener('webkitfullscreenchange', syncStageFullscreenFlag)
   dmIntentionalClose = true
   dmSendQueue.length = 0
   if (dmReconnectTimer) {
@@ -432,11 +481,72 @@ onUnmounted(() => {
   margin: 0 0 14px;
   min-height: 1.4em;
 }
+.live-stage {
+  max-width: 480px;
+  margin: 0 auto;
+}
 .live-video-wrap {
   position: relative;
   max-width: 480px;
   margin: 0 auto;
 }
+.live-stage:fullscreen,
+.live-stage:-webkit-full-screen {
+  max-width: none;
+  width: 100%;
+  height: 100%;
+  margin: 0;
+  padding: 10px 14px calc(12px + env(safe-area-inset-bottom, 0px));
+  box-sizing: border-box;
+  background: #0a0a12;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+.live-stage:fullscreen .live-stage-media,
+.live-stage:-webkit-full-screen .live-stage-media {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+}
+.live-stage:fullscreen .live-video-wrap,
+.live-stage:-webkit-full-screen .live-video-wrap {
+  flex: 1;
+  min-height: 0;
+  max-width: none;
+  width: 100%;
+  margin: 0;
+  display: flex;
+  flex-direction: column;
+}
+.live-stage:fullscreen .live-room-video.live-room-video--contain,
+.live-stage:-webkit-full-screen .live-room-video.live-room-video--contain {
+  flex: 1;
+  min-height: 0;
+  width: 100%;
+  max-height: none;
+  aspect-ratio: unset;
+  object-fit: contain;
+}
+.live-stage:fullscreen .live-video-toolbar,
+.live-stage:-webkit-full-screen .live-video-toolbar {
+  flex-shrink: 0;
+  margin-top: 8px;
+}
+.live-stage:fullscreen .live-stage-footer,
+.live-stage:-webkit-full-screen .live-stage-footer {
+  flex-shrink: 0;
+  padding-top: 6px;
+}
+.live-stage:fullscreen .live-dm-auth-row,
+.live-stage:fullscreen .live-dm-bar,
+.live-stage:fullscreen .live-dm-hint,
+.live-stage:-webkit-full-screen .live-dm-auth-row,
+.live-stage:-webkit-full-screen .live-dm-bar,
+.live-stage:-webkit-full-screen .live-dm-hint {
+  max-width: none;
+}
 .live-dm-layer {
   pointer-events: none;
   position: absolute;