diff --git a/src/api/bigscreen.js b/src/api/bigscreen.js
new file mode 100644
index 0000000..72263c3
--- /dev/null
+++ b/src/api/bigscreen.js
@@ -0,0 +1,16 @@
+import request from '@/utils/request'
+
+/** 获取大屏核心统计数据 */
+export const getBigScreenStats = () => {
+  return request.get('/bigscreen/stats')
+}
+
+/** 获取出勤趋势数据 */
+export const getBigScreenTrend = () => {
+  return request.get('/bigscreen/trend')
+}
+
+/** 获取课堂行为分布数据 */
+export const getBigScreenBehavior = () => {
+  return request.get('/bigscreen/behavior-distribution')
+}
diff --git a/src/api/info.js b/src/api/info.js
index 301996c..a5fd052 100644
--- a/src/api/info.js
+++ b/src/api/info.js
@@ -27,6 +27,11 @@ export function deleteBuilding(ids) {
   return request({ url: '/building', method: 'delete', data: ids })
 }
 
+// 获取教室列表（下拉用，返回全部）
+export function getRoomsList() {
+  return request({ url: '/classroom/list', method: 'get' })
+}
+
 // 获取教室列表（分页，按教学楼id）
 export function getRooms(params) {
   return request({ url: '/classroom/page', method: 'get', params })
@@ -47,6 +52,11 @@ export function deleteRoom(ids) {
   return request({ url: '/classroom', method: 'delete', data: ids })
 }
 
+// 获取摄像头列表（下拉用，返回全部）
+export function getDeviceList() {
+  return request({ url: '/device/list', method: 'get' })
+}
+
 // 获取摄像头列表（按教室id）
 export function getCameras(params) {
   return request({ url: '/device/page', method: 'get', params })
diff --git a/src/components/WebRtcPlayer.vue b/src/components/WebRtcPlayer.vue
new file mode 100644
index 0000000..44f7ef8
--- /dev/null
+++ b/src/components/WebRtcPlayer.vue
@@ -0,0 +1,280 @@
+<template>
+  <div class="webrtc-wrapper">
+    <video 
+      ref="videoRef" 
+      autoplay 
+      muted 
+      playsinline 
+      class="video-player"
+    ></video>
+    
+    <!-- 加载状态 -->
+    <div v-if="loading" class="loading-overlay">
+      <span class="spinner"></span>
+      <span>连接中...</span>
+    </div>
+
+    <!-- 录制状态指示器 -->
+    <div v-if="isRecording" class="recording-indicator">
+      <span class="dot"></span> 录制中 {{ recordTime }}s
+    </div>
+
+    <div v-if="error" class="error-overlay">{{ error }}</div>
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted, onUnmounted, watch } from 'vue';
+const props = defineProps({
+  src: { type: String, required: true }
+});
+
+// 监听 src 变化，重新连接
+watch(() => props.src, (newSrc, oldSrc) => {
+  if (newSrc && newSrc !== oldSrc) {
+    disconnect();
+    connect();
+  }
+});
+
+// 暴露给父组件的方法
+const emit = defineEmits(['record-status-change','record-complete']);
+
+const videoRef = ref(null);
+const error = ref('');
+const loading = ref(false);
+let pc = null;
+
+// --- 录屏相关状态 ---
+const isRecording = ref(false);
+const recordTime = ref(0);
+let mediaRecorder = null;
+let recordedChunks = [];
+let timerInterval = null;
+
+// 1. 断开 WebRTC 连接
+const disconnect = () => {
+  if (pc) {
+    pc.close();
+    pc = null;
+  }
+  if (videoRef.value) {
+    videoRef.value.srcObject = null;
+  }
+  error.value = '';
+};
+
+// 2. 连接 WebRTC
+const connect = async () => {
+  loading.value = true;
+  error.value = '';
+  try {
+    pc = new RTCPeerConnection();
+    pc.ontrack = (event) => {
+      if (videoRef.value && event.streams[0]) {
+        videoRef.value.srcObject = event.streams[0];
+      }
+    };
+    pc.addTransceiver('video', { direction: 'recvonly' });
+    pc.addTransceiver('audio', { direction: 'recvonly' });
+
+    const offer = await pc.createOffer();
+    await pc.setLocalDescription(offer);
+
+    const res = await fetch(props.src, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/sdp' },
+      body: pc.localDescription.sdp
+    });
+    
+    if (!res.ok) throw new Error(`Status: ${res.status}`);
+    
+    const answer = await res.text();
+    await pc.setRemoteDescription({ type: 'answer', sdp: answer });
+  } catch (e) {
+    error.value = '连接失败，请检查视频地址';
+    console.error(e);
+  } finally {
+    let timeout = setTimeout(() => {
+      loading.value = false;
+      clearTimeout(timeout);
+    }, 1500);
+  }
+};
+
+// 2. 截图功能
+const takeSnapshot = () => {
+  if (!videoRef.value) return null;
+  
+  const video = videoRef.value;
+  const canvas = document.createElement('canvas');
+  canvas.width = video.videoWidth;
+  canvas.height = video.videoHeight;
+  
+  const ctx = canvas.getContext('2d');
+  ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
+  
+  // 转换为 Blob (格式可选: image/png, image/jpeg)
+  return new Promise((resolve) => {
+    canvas.toBlob((blob) => {
+      resolve(blob);
+    }, 'image/jpeg', 0.9);
+  });
+};
+
+// 3. 开始录屏
+const startRecord = () => {
+  if (!videoRef.value || isRecording.value) return;
+
+  try {
+    // 捕获视频流的 MediaStream
+    // 注意：captureStream 是实验性 API，但在现代 Chrome/Edge/Firefox 中支持良好
+    const stream = videoRef.value.captureStream ? videoRef.value.captureStream() : videoRef.value.mozCaptureStream();
+    
+    if (!stream) {
+      error.value = '浏览器不支持捕获视频流';
+      return;
+    }
+
+    recordedChunks = [];
+    // 创建 MediaRecorder
+    // mimeType 可以根据需要选择，例如 'video/webm; codecs=vp9'
+    mediaRecorder = new MediaRecorder(stream, { mimeType: 'video/webm' });
+
+    mediaRecorder.ondataavailable = (event) => {
+      if (event.data.size > 0) {
+        recordedChunks.push(event.data);
+      }
+    };
+
+    mediaRecorder.onstop = () => {
+        const blob = new Blob(recordedChunks, { type: 'video/webm' });
+        recordedChunks = []; // 清空数组释放内存
+        
+        // 【关键】将 blob 发送给父组件
+        emit('record-complete', blob);
+        
+        console.log('录制完成，Blob大小:', blob.size);
+    };
+
+    mediaRecorder.start();
+    isRecording.value = true;
+    recordTime.value = 0;
+    
+    // 计时器
+    timerInterval = setInterval(() => {
+      recordTime.value++;
+    }, 1000);
+
+    emit('record-status-change', true);
+
+  } catch (err) {
+    console.error('录制启动失败:', err);
+    error.value = '录制启动失败';
+  }
+};
+
+// 4. 停止录屏
+const stopRecord = () => {
+  if (mediaRecorder && isRecording.value) {
+    mediaRecorder.stop();
+    isRecording.value = false;
+    clearInterval(timerInterval);
+    emit('record-status-change', false);
+  }
+};
+
+// 5. 处理录制完成（这里可以改为直接上传后端）
+const handleRecordComplete = (blob) => {
+  console.log('录制完成，文件大小:', blob.size, 'bytes');
+  
+  // 【示例】如何上传给后端
+  // uploadVideoToServer(blob);
+  
+  // 如果需要在前端预览或下载，可以创建 URL
+  // const url = URL.createObjectURL(blob);
+};
+
+// 【可选】上传函数示例
+const uploadVideoToServer = async (blob) => {
+  const formData = new FormData();
+  formData.append('file', blob, `record_${new Date().getTime()}.webm`);
+  
+  try {
+    // 替换为你的后端上传接口
+    // await axios.post('/api/upload/video', formData);
+    console.log('视频上传成功');
+  } catch (e) {
+    console.error('上传失败', e);
+  }
+};
+
+onMounted(() => connect());
+
+onUnmounted(() => {
+  if (pc) pc.close();
+  if (isRecording.value) stopRecord();
+});
+
+// 暴露方法给父组件
+defineExpose({
+  takeSnapshot,
+  startRecord,
+  stopRecord
+});
+</script>
+
+<style scoped>
+.webrtc-wrapper { width: 100%; height: 100%; position: relative; background: #000; }
+.video-player { width: 100%; height: 100%; object-fit: contain; }
+.error-overlay { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: white; }
+
+.loading-overlay {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  color: rgba(255, 255, 255, 0.85);
+  font-size: 14px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+.spinner {
+  width: 20px;
+  height: 20px;
+  border: 2px solid rgba(255, 255, 255, 0.3);
+  border-top-color: #409eff;
+  border-radius: 50%;
+  animation: spin 0.8s linear infinite;
+}
+@keyframes spin {
+  to { transform: rotate(360deg); }
+}
+
+.recording-indicator {
+  position: absolute;
+  top: 10px;
+  right: 10px;
+  background: rgba(0, 0, 0, 0.6);
+  color: white;
+  padding: 4px 8px;
+  border-radius: 4px;
+  font-size: 12px;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+.dot {
+  width: 8px;
+  height: 8px;
+  background-color: red;
+  border-radius: 50%;
+  animation: blink 1s infinite;
+}
+@keyframes blink {
+  0% { opacity: 1; }
+  50% { opacity: 0.4; }
+  100% { opacity: 1; }
+}
+</style>
\ No newline at end of file
diff --git a/src/router/index.js b/src/router/index.js
index 6c02f21..33fecf3 100644
--- a/src/router/index.js
+++ b/src/router/index.js
@@ -61,7 +61,7 @@ const routes = [
       {
         path: 'info/student',
         name: 'InfoStudent',
-        component: () => import('@/views/settings/personnel.vue'),
+        component: () => import('@/views/info/student.vue'),
         meta: { title: '学生信息', icon: 'User' }
       },
       {
diff --git a/src/views/bigscreen/index.vue b/src/views/bigscreen/index.vue
index 5e52a9a..ae9db4a 100644
--- a/src/views/bigscreen/index.vue
+++ b/src/views/bigscreen/index.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="bigscreen" @dblclick="toggleFullscreen">
+  <div ref="bigscreenRef" class="bigscreen" @dblclick="toggleFullscreen">
     <!-- 顶部标题区 -->
     <header class="bs-header">
       <div class="bs-header-left">
@@ -14,7 +14,10 @@
           <el-icon><Clock /></el-icon>
           <span>{{ currentTime }}</span>
         </div>
-        <el-button :icon="Refresh" circle size="small" @click="refreshData" />
+        <el-button :icon="Refresh" circle size="small" class="refresh-btn" @click="refreshData" />
+        <el-tooltip :content="isFullscreen ? '退出全屏' : '全屏展示'" placement="bottom">
+          <el-button :icon="FullScreen" circle size="small" class="fullscreen-btn" @click="toggleFullscreen" />
+        </el-tooltip>
       </div>
     </header>
 
@@ -25,11 +28,11 @@
           <el-icon :size="28"><UserFilled /></el-icon>
         </div>
         <div class="stat-body">
-          <div class="stat-value">96.8<span class="stat-unit">%</span></div>
+          <div class="stat-value">{{ stats.attendanceRate }}<span class="stat-unit">%</span></div>
           <div class="stat-label">全校今日出勤率</div>
-          <div class="stat-trend up">
-            <el-icon><CaretTop /></el-icon>
-            2.5% 较昨日
+          <div class="stat-trend" :class="stats.trend >= 0 ? 'up' : 'down'">
+            <el-icon><CaretTop v-if="stats.trend >= 0" /><CaretBottom v-else /></el-icon>
+            {{ Math.abs(stats.trend) }}% 较昨日
           </div>
         </div>
       </div>
@@ -39,11 +42,11 @@
           <el-icon :size="28"><TrendCharts /></el-icon>
         </div>
         <div class="stat-body">
-          <div class="stat-value">85.2<span class="stat-unit">%</span></div>
+          <div class="stat-value">{{ stats.focusRate }}<span class="stat-unit">%</span></div>
           <div class="stat-label">课堂专注度占比</div>
-          <div class="stat-trend up">
-            <el-icon><CaretTop /></el-icon>
-            0.8% 较昨日
+          <div class="stat-trend" :class="stats.focusTrend >= 0 ? 'up' : 'down'">
+            <el-icon><CaretTop v-if="stats.focusTrend >= 0" /><CaretBottom v-else /></el-icon>
+            {{ Math.abs(stats.focusTrend) }}% 较昨日
           </div>
         </div>
       </div>
@@ -72,80 +75,148 @@
     <div class="bs-monitor">
       <div class="monitor-header">
         <h3>教室实时监控</h3>
-        <div class="monitor-tabs">
-          <span v-for="(cam, i) in cameras" :key="i" :class="{ active: activeCamera === i }" @click="activeCamera = i">
-            {{ cam }}
-          </span>
+        <div class="monitor-selects">
+          <el-select v-model="selectedBuildingId" placeholder="选择教学楼" size="small" class="monitor-select" popper-class="monitor-select-popper" :teleported="false" @change="onBuildingChange">
+            <el-option v-for="b in buildingList" :key="b.id" :label="b.buildingName" :value="b.id" />
+          </el-select>
+          <el-select v-model="selectedRoomId" placeholder="选择教室" size="small" class="monitor-select" popper-class="monitor-select-popper" :teleported="false" :disabled="!selectedBuildingId" @change="onRoomChange">
+            <el-option v-for="r in filteredRooms" :key="r.id" :label="r.roomName" :value="r.id" />
+          </el-select>
         </div>
       </div>
       <div class="monitor-grid">
-        <div v-for="i in 4" :key="i" class="monitor-cell" @click="enlargeMonitor(i)">
-          <div class="monitor-feed">
-            <el-icon :size="36" color="#4a4a6a"><VideoCamera /></el-icon>
+        <div v-if="!selectedBuildingId" class="monitor-empty">请选择教学楼和教室查看监控</div>
+        <template v-else-if="!selectedRoomId">
+          <div class="monitor-empty">请选择教室查看监控</div>
+        </template>
+        <template v-else>
+          <div v-for="device in filteredDevices" :key="device.id" class="monitor-cell">
+            <div class="monitor-feed">
+              <WebRtcPlayer v-if="device.streamUrl" :src="`${device.streamUrl}/whep`"/>
+              <el-icon v-else :size="36" color="#4a4a6a"><VideoCamera /></el-icon>
+            </div>
+            <div class="monitor-label">
+              <span class="label-left">
+                <span class="dot" :class="{ pulse: device.onlineStatus === 1, offline: device.onlineStatus !== 1 }"></span>
+                {{ device.deviceName || device.deviceNo }} · {{ device.onlineStatus === 1 ? '直播中' : '离线' }}
+              </span>
+              <el-icon :size="15" class="zoom-icon" @click.stop="enlargeMonitor(device)"><FullScreen /></el-icon>
+            </div>
           </div>
-          <div class="monitor-label">
-            <span class="dot pulse"></span>
-            教室 {{ 300 + i }} · 直播中
-          </div>
-        </div>
+          <div v-if="filteredDevices.length === 0" class="monitor-empty">暂无数据</div>
+        </template>
       </div>
     </div>
+    <!-- 视频放大弹窗 -->
+    <el-dialog v-model="videoDialogVisible" :title="videoDialogDevice?.deviceName || videoDialogDevice?.deviceNo || '监控画面'" width="80%" top="5vh" class="video-dialog" destroy-on-close>
+      <div class="dialog-video-wrapper">
+        <WebRtcPlayer v-if="videoDialogDevice?.streamUrl" :src="`${videoDialogDevice.streamUrl}/whep`" />
+        <div v-else class="dialog-no-stream">该设备暂无视频流</div>
+      </div>
+    </el-dialog>
   </div>
 </template>
 
 <script setup>
-import { ref, onMounted, onUnmounted } from 'vue'
+import { ref, reactive, computed, onMounted, onUnmounted } from 'vue'
 import { ElMessage } from 'element-plus'
 import * as echarts from 'echarts'
+import { Refresh, FullScreen } from '@element-plus/icons-vue'
+import { getBigScreenStats, getBigScreenTrend, getBigScreenBehavior } from '@/api/bigscreen'
+import { getBuildingList, getRoomsList, getDeviceList } from '@/api/info'
+import WebRtcPlayer from '@/components/WebRtcPlayer.vue' 
 
 const currentTime = ref('')
 const timer = ref(null)
 
-const activeCamera = ref(0)
-const cameras = ref(['第一教学楼', '第二教学楼', '实验楼'])
+// 监控区域
+const buildingList = ref([])
+const roomList = ref([])
+const deviceList = ref([])
+const selectedBuildingId = ref(null)
+const selectedRoomId = ref(null)
+
+const filteredRooms = computed(() => {
+  if (!selectedBuildingId.value) return []
+  return roomList.value.filter(r => r.buildingId === selectedBuildingId.value)
+})
+
+const filteredDevices = computed(() => {
+  if (!selectedRoomId.value) return []
+  return deviceList.value.filter(d => d.classroomId === selectedRoomId.value)
+})
+
+const onBuildingChange = () => {
+  selectedRoomId.value = null
+}
+
+const onRoomChange = () => {
+  // 选择教室后设备自动过滤
+}
 
 const trendChartRef = ref(null)
 const behaviorChartRef = ref(null)
+const trendChart = ref(null)
 
-const refreshData = () => {
-  ElMessage.success('数据已刷新')
-}
+const stats = reactive({
+  attendanceRate: 0,
+  trend: 0,
+  focusRate: 0,
+  focusTrend: 0
+})
 
-const toggleFullscreen = () => {
-  if (document.fullscreenElement) {
-    document.exitFullscreen()
-  } else {
-    document.documentElement.requestFullscreen()
+const fetchStats = async () => {
+  try {
+    const res = await getBigScreenStats()
+    if (res?.data) {
+      stats.attendanceRate = res.data.attendanceRate ?? stats.attendanceRate
+      stats.trend = res.data.trend ?? stats.trend
+      stats.focusRate = res.data.focusRate ?? stats.focusRate
+      stats.focusTrend = res.data.focusTrend ?? stats.focusTrend
+    }
+  } catch {
+    ElMessage.warning('获取大屏数据失败')
   }
 }
 
-const enlargeMonitor = (i) => {
-  ElMessage.info(`放大查看教室${300 + i}监控画面`)
-}
+const fetchTrend = async () => {
+  try {
+    const res = await getBigScreenTrend()
+    if (!res?.data || !trendChartRef.value) return
+    const { dates, rates } = res.data
+    const yMin = Math.max(0, Math.floor(Math.min(...rates) - 2))
+    const yMax = Math.min(100, Math.ceil(Math.max(...rates) + 2))
 
-const updateTime = () => {
-  const now = new Date()
-  currentTime.value = now.toLocaleString('zh-CN', {
-    year: 'numeric', month: '2-digit', day: '2-digit',
-    hour: '2-digit', minute: '2-digit', second: '2-digit'
-  })
-}
+    // 释放旧实例，重新初始化确保 tooltip 等配置完整生效
+    const old = echarts.getInstanceByDom(trendChartRef.value)
+    old?.dispose()
 
-const initCharts = () => {
-  // 出勤趋势
-  if (trendChartRef.value) {
     const chart = echarts.init(trendChartRef.value)
+    trendChart.value = chart
     chart.setOption({
-      tooltip: { trigger: 'axis' },
+      tooltip: {
+        trigger: 'axis',
+        backgroundColor: 'rgba(6, 12, 28, 0.92)',
+        borderColor: 'rgba(82, 196, 26, 0.35)',
+        textStyle: { color: '#fff', fontSize: 13 },
+        formatter: (params) => {
+          const p = Array.isArray(params) ? params[0] : params
+          return `<div style="line-height:1.8">
+            <span style="color:rgba(255,255,255,0.5)">日期：</span><span style="color:#fff">${p.axisValue}</span><br/>
+            <span style="color:rgba(255,255,255,0.5)">出勤率：</span><span style="color:#52c41a;font-weight:700;font-size:16px">${p.value}%</span>
+          </div>`
+        }
+      },
       grid: { top: 20, right: 20, bottom: 20, left: 40 },
-      xAxis: { type: 'category', data: ['5/26', '5/27', '5/28', '5/29', '5/30', '5/31', '6/01'], axisLabel: { fontSize: 11 } },
-      yAxis: { type: 'value', min: 85, max: 100, axisLabel: { formatter: '{value}%' } },
+      xAxis: { type: 'category', data: dates, axisLabel: { fontSize: 11 } },
+      yAxis: { type: 'value', min: yMin, max: yMax, axisLabel: { formatter: '{value}%' } },
       series: [{
-        data: [93, 95, 94.5, 96, 95.8, 97, 96.8],
+        name: '出勤率',
+        data: rates,
         type: 'line',
         smooth: true,
         symbol: 'circle',
-        symbolSize: 6,
+        symbolSize: 8,
         lineStyle: { color: '#52c41a', width: 2.5 },
         itemStyle: { color: '#52c41a' },
         areaStyle: {
@@ -156,34 +227,115 @@ const initCharts = () => {
         }
       }]
     })
+  } catch {
+    ElMessage.warning('获取出勤趋势失败')
   }
+}
+
+const fetchBehavior = async () => {
+  try {
+    const res = await getBigScreenBehavior()
+    if (!res?.data || !behaviorChartRef.value) return
+
+    const old = echarts.getInstanceByDom(behaviorChartRef.value)
+    old?.dispose()
 
-  // 行为分布
-  if (behaviorChartRef.value) {
     const chart = echarts.init(behaviorChartRef.value)
     chart.setOption({
-      tooltip: { trigger: 'item', formatter: '{b}: {c}%' },
+      tooltip: {
+        trigger: 'item',
+        backgroundColor: 'rgba(6, 12, 28, 0.92)',
+        borderColor: 'rgba(114, 46, 209, 0.35)',
+        textStyle: { color: '#fff', fontSize: 13 },
+        formatter: '{b}: {c}%'
+      },
       series: [{
         type: 'pie',
         radius: ['50%', '75%'],
         center: ['50%', '55%'],
-        label: { fontSize: 11 },
-        data: [
-          { value: 65, name: '专注听讲', itemStyle: { color: '#52c41a' } },
-          { value: 15, name: '举手互动', itemStyle: { color: '#1890ff' } },
-          { value: 12, name: '低头书写', itemStyle: { color: '#722ed1' } },
-          { value: 5, name: '交谈讨论', itemStyle: { color: '#faad14' } },
-          { value: 3, name: '其他', itemStyle: { color: '#bfbfbf' } }
-        ]
+        label: { fontSize: 11, color: 'rgba(255,255,255,0.6)' },
+        data: res.data.map(item => ({
+          value: item.value,
+          name: item.name,
+          itemStyle: { color: item.color }
+        }))
       }]
     })
+  } catch {
+    ElMessage.warning('获取行为分布失败')
   }
 }
 
+const refreshData = () => {
+  Promise.all([fetchStats(), fetchTrend(), fetchBehavior()])
+  ElMessage.success('数据已刷新')
+}
+
+const bigscreenRef = ref(null)
+const isFullscreen = ref(false)
+
+const syncFullscreenState = () => {
+  isFullscreen.value = document.fullscreenElement === bigscreenRef.value
+}
+
+const toggleFullscreen = () => {
+  if (document.fullscreenElement) {
+    document.exitFullscreen()
+  } else {
+    bigscreenRef.value?.requestFullscreen()
+  }
+}
+
+onMounted(() => {
+  document.addEventListener('fullscreenchange', syncFullscreenState)
+})
+
+onUnmounted(() => {
+  document.removeEventListener('fullscreenchange', syncFullscreenState)
+})
+
+const enlargeMonitor = (device) => {
+  videoDialogDevice.value = device
+  videoDialogVisible.value = true
+}
+
+// 视频放大弹窗
+const videoDialogVisible = ref(false)
+const videoDialogDevice = ref(null)
+
+const fetchMonitorData = async () => {
+  try {
+    const [bRes, rRes, dRes] = await Promise.all([
+      getBuildingList(),
+      getRoomsList(),
+      getDeviceList()
+    ])
+    if (bRes?.data) buildingList.value = bRes.data
+    if (rRes?.data) roomList.value = rRes.data
+    if (dRes?.data) deviceList.value = dRes.data
+  } catch {
+    ElMessage.warning('获取监控数据失败')
+  }
+}
+
+const updateTime = () => {
+  const now = new Date()
+  currentTime.value = now.toLocaleString('zh-CN', {
+    year: 'numeric', month: '2-digit', day: '2-digit',
+    hour: '2-digit', minute: '2-digit', second: '2-digit'
+  })
+}
+
+const initCharts = () => {
+  // 出勤趋势图表由 fetchTrend 完整初始化（含 API 数据）
+  // 课堂行为分布图表由 fetchBehavior 完整初始化（含 API 数据）
+}
+
 onMounted(() => {
   updateTime()
   timer.value = setInterval(updateTime, 1000)
   initCharts()
+  Promise.all([fetchStats(), fetchTrend(), fetchBehavior(), fetchMonitorData()])
   window.addEventListener('resize', () => {
     [trendChartRef.value, behaviorChartRef.value].forEach(el => {
       const instance = echarts.getInstanceByDom(el)
@@ -200,14 +352,25 @@ onUnmounted(() => {
 <style lang="scss" scoped>
 .bigscreen {
   width: 100%;
-  min-height: calc(100vh - 96px);
+  height: calc(100vh - 96px);
   background: linear-gradient(180deg, #0a1628 0%, #132042 50%, #1a2d4a 100%);
   color: #ffffff;
   padding: 0 24px 20px;
   overflow: hidden;
+  display: flex;
+  flex-direction: column;
+}
+
+/* 全屏时占满整个屏幕，隐藏左侧菜单和顶部导航 */
+.bigscreen:fullscreen {
+  height: 100vh;
+  width: 100vw;
+  padding: 16px 32px 24px;
+  box-sizing: border-box;
 }
 
 .bs-header {
+  flex-shrink: 0;
   display: flex;
   align-items: center;
   justify-content: space-between;
@@ -252,7 +415,24 @@ onUnmounted(() => {
   font-family: monospace;
 }
 
+.refresh-btn,
+.fullscreen-btn {
+  --el-button-bg-color: rgba(82, 196, 26, 0.12) !important;
+  --el-button-border-color: rgba(82, 196, 26, 0.25) !important;
+  --el-button-hover-bg-color: rgba(82, 196, 26, 0.22) !important;
+  --el-button-hover-border-color: rgba(82, 196, 26, 0.45) !important;
+  --el-button-text-color: #52c41a !important;
+  box-shadow: 0 0 12px rgba(82, 196, 26, 0.15);
+  transition: all 0.3s ease;
+
+  &:hover {
+    box-shadow: 0 0 20px rgba(82, 196, 26, 0.3);
+    transform: translateY(-1px);
+  }
+}
+
 .bs-stats {
+  flex-shrink: 0;
   display: grid;
   grid-template-columns: repeat(2, 1fr);
   gap: 16px;
@@ -322,6 +502,7 @@ onUnmounted(() => {
 }
 
 .bs-charts {
+  flex-shrink: 0;
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: 16px;
@@ -354,10 +535,14 @@ onUnmounted(() => {
 }
 
 .bs-monitor {
+  flex: 1;
+  min-height: 0;
   background: rgba(255, 255, 255, 0.03);
   border: 1px solid rgba(255, 255, 255, 0.06);
   border-radius: 8px;
   overflow: hidden;
+  display: flex;
+  flex-direction: column;
 }
 
 .monitor-header {
@@ -374,31 +559,56 @@ onUnmounted(() => {
   }
 }
 
-.monitor-tabs {
+.monitor-selects {
   display: flex;
-  gap: 4px;
+  gap: 8px;
+}
 
-  span {
-    padding: 4px 12px;
-    border-radius: 4px;
-    font-size: 12px;
-    color: rgba(255, 255, 255, 0.4);
-    cursor: pointer;
-    transition: all 0.2s ease;
+.monitor-select {
+  width: 160px;
 
-    &:hover { color: rgba(255, 255, 255, 0.7); }
-    &.active {
-      background: rgba(82, 196, 26, 0.2);
-      color: #52c41a;
-    }
+  :deep(.el-select__wrapper) {
+    background: rgba(255, 255, 255, 0.06);
+    border-color: rgba(255, 255, 255, 0.12);
+    box-shadow: none;
+  }
+
+  :deep(.el-select__wrapper:hover) {
+    border-color: rgba(82, 196, 26, 0.35);
+  }
+
+  :deep(.el-select__wrapper.is-focus) {
+    border-color: rgba(82, 196, 26, 0.5);
+    box-shadow: 0 0 0 1px rgba(82, 196, 26, 0.2);
+  }
+
+  :deep(.el-select__placeholder) {
+    color: rgba(255, 255, 255, 0.3);
+  }
+
+  :deep(.el-select__placeholder.is-transparent) {
+    color: rgba(255, 255, 255, 0.3);
+  }
+
+  :deep(.el-select__selected-item) {
+    color: rgba(255, 255, 255, 0.85);
+  }
+
+  :deep(.el-select__caret) {
+    color: rgba(255, 255, 255, 0.35);
   }
 }
 
 .monitor-grid {
+  flex: 1;
+  min-height: 0;
   display: grid;
   grid-template-columns: repeat(4, 1fr);
+  grid-auto-rows: min-content;
   gap: 12px;
   padding: 16px;
+  overflow-y: auto;
+  align-content: start;
 }
 
 .monitor-cell {
@@ -415,7 +625,7 @@ onUnmounted(() => {
 }
 
 .monitor-feed {
-  height: 160px;
+  height: 180px;
   background: #0a1020;
   display: flex;
   align-items: center;
@@ -429,15 +639,71 @@ onUnmounted(() => {
   color: rgba(255, 255, 255, 0.6);
   display: flex;
   align-items: center;
+  justify-content: space-between;
   gap: 6px;
 }
 
+.label-left {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  min-width: 0;
+}
+
+.zoom-icon {
+  flex-shrink: 0;
+  color: rgba(255, 255, 255, 0.3);
+  cursor: pointer;
+  transition: all 0.2s ease;
+
+  &:hover {
+    color: #52c41a;
+    transform: scale(1.2);
+  }
+}
+
 .dot {
   width: 6px;
   height: 6px;
   border-radius: 50%;
   background: #52c41a;
   display: inline-block;
+
+  &.offline { background: #666; }
+}
+
+.monitor-empty {
+  grid-column: 1 / -1;
+  text-align: center;
+  padding: 48px 0;
+  color: rgba(255, 255, 255, 0.3);
+  font-size: 14px;
+}
+
+/* 视频放大弹窗 */
+.dialog-video-wrapper {
+  width: 100%;
+  aspect-ratio: 16 / 9;
+  background: #0a1020;
+  border-radius: 6px;
+  overflow: hidden;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  :deep(.webrtc-wrapper),
+  :deep(.video-player) {
+    width: 100%;
+    height: 100%;
+  }
+}
+
+.dialog-no-stream {
+  color: rgba(255, 255, 255, 0.3);
+  font-size: 15px;
 }
 
 @media (max-width: 1200px) {
@@ -445,3 +711,74 @@ onUnmounted(() => {
   .monitor-grid { grid-template-columns: repeat(2, 1fr); }
 }
 </style>
+
+<style lang="scss">
+/* 视频弹窗全局暗色覆盖（dialog 渲染到 body，需非 scoped） */
+.video-dialog {
+  --el-dialog-bg-color: #0a1628;
+  --el-dialog-border-radius: 10px;
+  --el-border-color: rgba(82, 196, 26, 0.15);
+
+  .el-dialog__header {
+    padding: 16px 20px;
+    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
+  }
+
+  .el-dialog__title {
+    color: rgba(255, 255, 255, 0.85);
+    font-size: 16px;
+    font-weight: 600;
+  }
+
+  .el-dialog__headerbtn .el-dialog__close {
+    color: rgba(255, 255, 255, 0.4);
+    font-size: 18px;
+
+    &:hover {
+      color: #52c41a;
+    }
+  }
+
+  .el-dialog__body {
+    padding: 16px 20px 20px;
+  }
+}
+
+/* 大屏监控下拉框浮层 — popper-class 挂在 .el-popper 根元素上 */
+.el-popper.monitor-select-popper {
+  /* 浮层容器：暗色背景 + 深色边框，与选中框视觉一致 */
+  &.is-light,
+  &.is-dark {
+    background-color: rgba(10, 22, 40, 0.96) !important;
+    border-color: rgba(60, 80, 110, 0.4) !important;
+
+    /* 小三角：背景和边框与浮层完全一致 */
+    .el-popper__arrow::before {
+      background-color: rgba(10, 22, 40, 0.96);
+      border-color: rgba(60, 80, 110, 0.4);
+    }
+  }
+
+  /* 下拉列表区域 */
+  .el-select-dropdown {
+    background: transparent !important;
+  }
+
+  /* 列表项文字 + hover / 选中态 */
+  .el-select-dropdown__item {
+    color: rgba(255, 255, 255, 0.75) !important;
+  }
+
+  .el-select-dropdown__item:hover,
+  .el-select-dropdown__item.is-hovering {
+    color: #fff !important;
+    background: rgba(82, 196, 26, 0.15) !important;
+  }
+
+  .el-select-dropdown__item.is-selected {
+    color: #52c41a !important;
+    background: rgba(82, 196, 26, 0.12) !important;
+    font-weight: 600;
+  }
+}
+</style>
diff --git a/src/views/info/building.vue b/src/views/info/building.vue
index 2dda4a8..0a2a0eb 100644
--- a/src/views/info/building.vue
+++ b/src/views/info/building.vue
@@ -509,7 +509,7 @@ const loadCameras = async () => {
   }
 }
 
-const cameraForm = ref({ deviceNo: '', name: '', ip: '', streamType: 'webrtc', position: '', status: '在线' })
+const cameraForm = ref({ deviceNo: '', name: '', streamUrl: '', streamType: 'webrtc', position: '', status: '在线' })
 
 watch(cameraPage, () => loadCameras())
 watch(cameraSearch, () => {
@@ -528,7 +528,7 @@ const showCameraDialog = (row) => {
     cameraForm.value = { ...row }
   } else {
     cameraEditing.value = false
-    cameraForm.value = { deviceNo: '', name: '', ip: '', streamType: 'webrtc', position: '', status: '在线' }
+    cameraForm.value = { deviceNo: '', name: '', streamUrl: '', streamType: 'webrtc', position: '', status: '在线' }
   }
   cameraDialogVisible.value = true
 }
@@ -539,7 +539,7 @@ const saveCamera = async () => {
     deviceType: 'camera',
     deviceName: cameraForm.value.name,
     streamType: cameraForm.value.streamType,
-    streamUrl: cameraForm.value.ip,
+    streamUrl: cameraForm.value.streamUrl,
     location: cameraForm.value.position,
     onlineStatus: cameraForm.value.status === '在线' ? 1 : 0,
     classroomId: currentRoom.value.id
diff --git a/src/views/settings/personnel.vue b/src/views/info/student.vue
similarity index 100%
rename from src/views/settings/personnel.vue
rename to src/views/info/student.vue