diff --git a/admin/src/views/sites/HomepageEdit.vue b/admin/src/views/sites/HomepageEdit.vue
index a64e371..cf61380 100644
--- a/admin/src/views/sites/HomepageEdit.vue
+++ b/admin/src/views/sites/HomepageEdit.vue
@@ -55,10 +55,24 @@
           填写同域可下载的静态地址（需将安装包放到站点 <code>promotion/downloads/</code> 并部署）。前台为「Windows 版下载」「安卓版下载」直连，不跳转整页。
         </p>
         <el-form-item label="Windows 安装包">
-          <el-input v-model="form.download_windows_url" placeholder="/promotion/downloads/yuheng-windows.zip" />
+          <div style="display: flex; gap: 8px; align-items: center; flex-wrap: wrap; width: 100%">
+            <el-input
+              v-model="form.download_windows_url"
+              placeholder="/promotion/downloads/yuheng-windows.zip"
+              style="flex: 1; min-width: 160px"
+            />
+            <el-button type="primary" link @click="openLinkPicker({ type: 'download_windows' })">选择链接</el-button>
+          </div>
         </el-form-item>
         <el-form-item label="安卓安装包">
-          <el-input v-model="form.download_android_url" placeholder="/promotion/downloads/yuheng-android.apk" />
+          <div style="display: flex; gap: 8px; align-items: center; flex-wrap: wrap; width: 100%">
+            <el-input
+              v-model="form.download_android_url"
+              placeholder="/promotion/downloads/yuheng-android.apk"
+              style="flex: 1; min-width: 160px"
+            />
+            <el-button type="primary" link @click="openLinkPicker({ type: 'download_android' })">选择链接</el-button>
+          </div>
         </el-form-item>
 
         <el-divider content-position="left">直播（前台 /live）</el-divider>
@@ -157,7 +171,7 @@ const saving = ref(false)
 const downloading = ref(false)
 const formRef = ref(null)
 const linkPickerVisible = ref(false)
-/** @type {import('vue').Ref<{ type: 'nav' | 'download' | 'platform'; index?: number }>} */
+/** @type {import('vue').Ref<{ type: 'nav' | 'download' | 'download_windows' | 'download_android' | 'platform'; index?: number }>} */
 const linkPickTarget = ref({ type: 'download' })
 
 const defaultForm = () => ({
@@ -285,6 +299,10 @@ function onLinkPicked(url) {
     form.nav_links[t.index].url = url
   } else if (t.type === 'download') {
     form.download_url = url
+  } else if (t.type === 'download_windows') {
+    form.download_windows_url = url
+  } else if (t.type === 'download_android') {
+    form.download_android_url = url
   } else if (t.type === 'platform' && typeof t.index === 'number') {
     form.platforms[t.index].url = url
   }
diff --git a/admin/src/views/sites/LiveBroadcast.vue b/admin/src/views/sites/LiveBroadcast.vue
index 712050c..5163722 100644
--- a/admin/src/views/sites/LiveBroadcast.vue
+++ b/admin/src/views/sites/LiveBroadcast.vue
@@ -70,7 +70,39 @@
         <el-button v-if="!session" type="primary" :disabled="!token" @click="start">开始直播</el-button>
         <el-button v-else type="danger" @click="stop">结束直播</el-button>
       </div>
-      <div class="live-preview-row">
+      <div class="live-preview-layout">
+        <div class="live-bw-slot">
+          <el-card class="live-bw-panel" shadow="never">
+            <template #header>
+              <div class="live-bw-head">
+                <span>带宽使用情况</span>
+                <el-text v-if="bwUpdatedAt" type="info" size="small">{{ bwUpdatedAt }}</el-text>
+              </div>
+            </template>
+            <template v-if="bandwidth">
+              <div class="live-bw-metrics">
+                <div class="live-bw-line">
+                  <span class="live-bw-label">近 60 秒出站</span>
+                  <strong class="live-bw-strong">{{ bandwidth.recent_egress_mbps }} Mbps</strong>
+                  <span class="live-bw-sub">{{ formatBwBytes(bandwidth.bytes_out_last_60s) }} / 60s</span>
+                </div>
+                <div class="live-bw-line">
+                  <span class="live-bw-label">近 60 秒入站</span>
+                  <strong class="live-bw-strong">{{ bandwidth.recent_ingress_mbps }} Mbps</strong>
+                  <span class="live-bw-sub">{{ formatBwBytes(bandwidth.bytes_in_last_60s) }} / 60s</span>
+                </div>
+                <div class="live-bw-line live-bw-line--split">
+                  <span class="live-bw-mini">平均出站 {{ bandwidth.avg_egress_mbps }} Mbps</span>
+                  <span class="live-bw-mini">运行 {{ formatBwUptime(bandwidth.uptime_seconds) }}</span>
+                </div>
+              </div>
+              <p class="live-bw-footnote">
+                为本 Go 进程 HTTP 粗估；前有 Nginx/CDN 时公网带宽可能更高。
+              </p>
+            </template>
+            <el-text v-else type="info" size="small">统计加载中或暂不可用</el-text>
+          </el-card>
+        </div>
         <div ref="previewWrapRef" class="preview-wrap">
           <video
             v-show="previewLayout !== 'screen_pip'"
@@ -197,7 +229,13 @@ import { ref, computed, watch, onMounted, onUnmounted } from 'vue'
 import { onBeforeRouteLeave } from 'vue-router'
 import { useAuthStore } from '../../stores/auth'
 import { ElMessage } from 'element-plus'
-import { getLiveModeration, setLiveMuteAll, setLiveMuteIP, setLiveMuteUser } from '../../api/admin'
+import {
+  getLiveModeration,
+  getStats,
+  setLiveMuteAll,
+  setLiveMuteIP,
+  setLiveMuteUser
+} from '../../api/admin'
 import { startPublishing } from '../../utils/liveWebRTC'
 
 function liveStatusUrl() {
@@ -229,6 +267,53 @@ const manualUsername = ref('')
 const mutedUsernames = ref([])
 const moderationRate = ref({ window_ms: 3000, max_hits: 10 })
 let moderationTimer = null
+/** @type {import('vue').Ref<Record<string, unknown> | null>} */
+const bandwidth = ref(null)
+const bwFetchAt = ref(0)
+const bwUpdatedAt = computed(() => {
+  if (!bwFetchAt.value) return ''
+  return `更新于 ${new Date(bwFetchAt.value).toLocaleTimeString()}`
+})
+
+function formatBwBytes(n) {
+  if (n == null || !Number.isFinite(Number(n)) || Number(n) < 0) return '—'
+  const v = Number(n)
+  if (v < 1024) return `${v} B`
+  const u = ['KB', 'MB', 'GB', 'TB']
+  let x = v
+  let i = -1
+  do {
+    x /= 1024
+    i++
+  } while (x >= 1024 && i < u.length - 1)
+  return `${x < 10 ? x.toFixed(2) : x.toFixed(1)} ${u[i]}`
+}
+
+function formatBwUptime(sec) {
+  if (sec == null || !Number.isFinite(Number(sec)) || Number(sec) < 0) return '—'
+  const s = Math.floor(Number(sec))
+  const h = Math.floor(s / 3600)
+  const m = Math.floor((s % 3600) / 60)
+  const r = s % 60
+  if (h > 0) return `${h} 小时 ${m} 分`
+  if (m > 0) return `${m} 分 ${r} 秒`
+  return `${r} 秒`
+}
+
+async function fetchBandwidth() {
+  try {
+    const res = await getStats()
+    const bw = res?.bandwidth
+    if (bw && typeof bw === 'object') {
+      bandwidth.value = bw
+      bwFetchAt.value = Date.now()
+    }
+  } catch (_) {
+    /* 静默，不阻塞开播 */
+  }
+}
+
+let bwPollTimer = null
 /** @type {import('vue').Ref<'camera'|'screen_only'|'screen_pip'>} */
 const previewLayout = ref('camera')
 
@@ -485,6 +570,8 @@ onMounted(() => {
   refreshVideoDevices()
   loadModeration()
   moderationTimer = window.setInterval(loadModeration, 5000)
+  fetchBandwidth()
+  bwPollTimer = window.setInterval(fetchBandwidth, 8000)
 })
 
 watch(bitrateProfile, (v) => {
@@ -499,6 +586,10 @@ onUnmounted(() => {
     clearInterval(moderationTimer)
     moderationTimer = null
   }
+  if (bwPollTimer != null) {
+    clearInterval(bwPollTimer)
+    bwPollTimer = null
+  }
   window.removeEventListener('beforeunload', onBeforeUnload)
   window.removeEventListener('pointermove', onPipPointerMove)
 })
@@ -512,37 +603,107 @@ onBeforeRouteLeave(() => {
 .live-broadcast {
   max-width: min(1680px, 100%);
 }
-/* 预览与观众管控同一行：画面在左、管控在右（勿在窄屏外误触发布局为上下） */
-.live-preview-row {
-  display: flex;
-  flex-direction: row;
-  flex-wrap: nowrap;
-  align-items: flex-start;
-  gap: 16px;
+/* 右侧列：上为带宽卡片、下为观众管控；左侧为预览 */
+.live-preview-layout {
+  display: grid;
+  grid-template-columns: 1fr clamp(280px, 34vw, 420px);
+  grid-template-rows: auto auto;
+  gap: 12px 16px;
   margin-top: 4px;
   width: 100%;
+  align-items: start;
+}
+.live-bw-slot {
+  grid-column: 2;
+  grid-row: 1;
+  min-width: 0;
+}
+.live-bw-panel :deep(.el-card__header) {
+  padding: 10px 14px;
+}
+.live-bw-panel :deep(.el-card__body) {
+  padding: 12px 14px 14px;
+}
+.live-bw-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  flex-wrap: wrap;
+  font-size: 14px;
+  font-weight: 600;
+}
+.live-bw-metrics {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+.live-bw-line {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: baseline;
+  gap: 8px 12px;
+  font-size: 13px;
+}
+.live-bw-line--split {
+  justify-content: space-between;
+  color: #606266;
+  font-size: 12px;
+}
+.live-bw-label {
+  color: #606266;
+  min-width: 5.5em;
+}
+.live-bw-strong {
+  color: #409eff;
+  font-size: 15px;
+}
+.live-bw-sub {
+  color: #909399;
+  font-size: 12px;
+}
+.live-bw-mini {
+  font-size: 12px;
+}
+.live-bw-footnote {
+  margin: 10px 0 0;
+  font-size: 11px;
+  line-height: 1.45;
+  color: #909399;
+}
+.preview-wrap {
+  grid-column: 1;
+  grid-row: 2;
 }
 .live-moderation-aside {
-  flex: 0 0 auto;
-  width: clamp(280px, 34vw, 420px);
-  min-width: 260px;
+  grid-column: 2;
+  grid-row: 2;
+  width: 100%;
+  min-width: 0;
   max-height: calc(100vh - 180px);
   overflow-y: auto;
   overflow-x: hidden;
   position: sticky;
   top: 8px;
-  align-self: stretch;
+  align-self: start;
 }
-/* 仅小屏/手机再上下堆叠，避免 1200px 以下管理后台侧栏占宽导致误变单列 */
+/* 仅小屏/手机再上下堆叠 */
 @media (max-width: 768px) {
-  .live-preview-row {
-    flex-direction: column;
-    flex-wrap: wrap;
+  .live-preview-layout {
+    grid-template-columns: 1fr;
+    grid-template-rows: auto auto auto;
+  }
+  .live-bw-slot {
+    grid-column: 1;
+    grid-row: 1;
+  }
+  .preview-wrap {
+    grid-column: 1;
+    grid-row: 2;
   }
   .live-moderation-aside {
-    flex: 1 1 auto;
-    width: 100%;
-    min-width: 0;
+    grid-column: 1;
+    grid-row: 3;
     max-height: none;
     position: static;
     overflow-y: visible;
@@ -583,8 +744,8 @@ onBeforeRouteLeave(() => {
 }
 .preview-wrap {
   position: relative;
-  flex: 1 1 0;
   min-width: 0;
+  width: 100%;
   max-width: none;
 }
 .preview-main {