diff --git a/src/views/user-vm/UserVmDetail.vue b/src/views/user-vm/UserVmDetail.vue
index bd50bc2..122f2e8 100644
--- a/src/views/user-vm/UserVmDetail.vue
+++ b/src/views/user-vm/UserVmDetail.vue
@@ -464,13 +464,13 @@
                 <el-row :gutter="16" style="margin-top: 16px">
                   <el-col :span="12">
                     <el-card shadow="hover" class="metrics-card">
-                      <template #header><span class="metrics-title"><el-icon><Monitor /></el-icon> 磁盘 I/O</span></template>
+                      <template #header><span class="metrics-title"><el-icon><Monitor /></el-icon> 磁盘读写量</span></template>
                       <div ref="diskChartRef" class="chart-container"></div>
                     </el-card>
                   </el-col>
                   <el-col :span="12">
                     <el-card shadow="hover" class="metrics-card">
-                      <template #header><span class="metrics-title"><el-icon><Monitor /></el-icon> 网络流量</span></template>
+                      <template #header><span class="metrics-title"><el-icon><Monitor /></el-icon> 网络速率</span></template>
                       <div ref="netChartRef" class="chart-container"></div>
                     </el-card>
                   </el-col>
@@ -478,7 +478,7 @@
                 <el-row :gutter="16" style="margin-top: 16px">
                   <el-col :span="12">
                     <el-card shadow="hover" class="metrics-card">
-                      <template #header><span class="metrics-title"><el-icon><Monitor /></el-icon> 磁盘 IOPS</span></template>
+                      <template #header><span class="metrics-title"><el-icon><Monitor /></el-icon> 磁盘IO速率</span></template>
                       <div ref="diskIopsChartRef" class="chart-container"></div>
                     </el-card>
                   </el-col>
diff --git a/src/views/virtualization/VmDetail.vue b/src/views/virtualization/VmDetail.vue
index 4de91e0..717cc47 100644
--- a/src/views/virtualization/VmDetail.vue
+++ b/src/views/virtualization/VmDetail.vue
@@ -656,13 +656,13 @@
               <el-row :gutter="16" style="margin-top: 16px">
                 <el-col :span="12">
                   <el-card shadow="hover" class="metrics-card">
-                    <template #header><span class="metrics-title"><el-icon><Refresh /></el-icon> 磁盘 I/O</span></template>
+                    <template #header><span class="metrics-title"><el-icon><Refresh /></el-icon> 磁盘读写量</span></template>
                     <div ref="diskChartRef" class="chart-container"></div>
                   </el-card>
                 </el-col>
                 <el-col :span="12">
                   <el-card shadow="hover" class="metrics-card">
-                    <template #header><span class="metrics-title"><el-icon><Refresh /></el-icon> 网络流量</span></template>
+                    <template #header><span class="metrics-title"><el-icon><Refresh /></el-icon> 网络速率</span></template>
                     <div ref="netChartRef" class="chart-container"></div>
                   </el-card>
                 </el-col>
@@ -670,7 +670,7 @@
               <el-row :gutter="16" style="margin-top: 16px">
                 <el-col :span="12">
                   <el-card shadow="hover" class="metrics-card">
-                    <template #header><span class="metrics-title"><el-icon><Refresh /></el-icon> 磁盘 IOPS</span></template>
+                    <template #header><span class="metrics-title"><el-icon><Refresh /></el-icon> 磁盘IO速率</span></template>
                     <div ref="diskIopsChartRef" class="chart-container"></div>
                   </el-card>
                 </el-col>
diff --git a/src/views/virtualization/VmMonitor.vue b/src/views/virtualization/VmMonitor.vue
index fb3f0d6..5932881 100644
--- a/src/views/virtualization/VmMonitor.vue
+++ b/src/views/virtualization/VmMonitor.vue
@@ -1,10 +1,9 @@
 <template>
   <div class="vm-monitor-container">
-    <!-- 顶部选择器 -->
     <div class="monitor-toolbar">
       <div class="toolbar-row">
         <div class="toolbar-item">
-          <span class="toolbar-label">选择虚拟机</span>
+          <span class="toolbar-label">虚拟机</span>
           <el-select
             v-model="selectedVms"
             multiple
@@ -21,69 +20,62 @@
           <el-button link @click="selectedVms = []" v-if="selectedVms.length > 0">清空</el-button>
         </div>
         <div class="toolbar-item">
-          <span class="toolbar-label">监控指标</span>
+          <span class="toolbar-label">指标</span>
           <el-checkbox-group v-model="selectedMetrics">
             <el-checkbox label="cpu">CPU</el-checkbox>
             <el-checkbox label="memory">内存</el-checkbox>
-            <el-checkbox label="disk">磁盘 IO</el-checkbox>
+            <el-checkbox label="disk">磁盘IO</el-checkbox>
             <el-checkbox label="network">网络</el-checkbox>
           </el-checkbox-group>
         </div>
       </div>
       <div class="toolbar-row">
         <div class="toolbar-item">
-          <span class="toolbar-label">时间范围</span>
-          <el-date-picker
-            v-model="dateRange"
-            type="datetimerange"
-            range-separator="至"
-            start-placeholder="开始时间"
-            end-placeholder="结束时间"
-            :shortcuts="dateShortcuts"
-            value-format="YYYY-MM-DDTHH:mm:ss"
-            size="default"
-          />
+          <span class="toolbar-label">时间</span>
+          <el-select v-model="timeRange" style="width: 140px" @change="handleRefresh">
+            <el-option label="最近10分钟" :value="10" />
+            <el-option label="最近30分钟" :value="30" />
+            <el-option label="最近1小时" :value="60" />
+            <el-option label="最近3小时" :value="180" />
+            <el-option label="最近6小时" :value="360" />
+            <el-option label="最近12小时" :value="720" />
+            <el-option label="最近24小时" :value="1440" />
+          </el-select>
         </div>
         <div class="toolbar-item">
-          <el-button type="primary" @click="loadAllMetrics" :loading="metricsLoading" :disabled="selectedVms.length === 0">
-            开始监控
-          </el-button>
-          <el-button @click="loadAllMetrics" :loading="metricsLoading" :disabled="selectedVms.length === 0">
+          <span class="toolbar-label">自动刷新</span>
+          <el-select v-model="autoRefreshInterval" style="width: 120px" @change="resetAutoRefresh">
+            <el-option label="关闭" :value="0" />
+            <el-option label="10秒" :value="10" />
+            <el-option label="30秒" :value="30" />
+            <el-option label="1分钟" :value="60" />
+            <el-option label="5分钟" :value="300" />
+          </el-select>
+        </div>
+        <div class="toolbar-item">
+          <el-button type="primary" @click="handleRefresh" :loading="metricsLoading" :disabled="selectedVms.length === 0">
             刷新
           </el-button>
         </div>
       </div>
     </div>
 
-    <!-- 图表区域 -->
     <div class="charts-area" v-if="hasData">
-      <template v-for="metric in selectedMetrics" :key="metric">
-        <div class="metric-section">
-          <h3 class="metric-section-title">{{ metricLabels[metric] }}</h3>
-          <div class="charts-grid">
-            <div
-              v-for="vmName in selectedVms"
-              :key="`${metric}-${vmName}`"
-              class="chart-card"
-            >
-              <div class="chart-card-header">
-                <span class="chart-vm-name">{{ vmName }}</span>
-              </div>
-              <div class="chart-box" :ref="el => setChartRef(metric, vmName, el)"></div>
-            </div>
-          </div>
+      <div class="chart-section" v-for="metric in selectedMetrics" :key="metric">
+        <h3 class="chart-section-title">{{ metricLabels[metric] }}</h3>
+        <div class="chart-wrapper">
+          <div class="chart-box" :ref="el => setChartRef(metric, el)"></div>
         </div>
-      </template>
+      </div>
     </div>
 
-    <!-- 空状态 -->
     <el-empty v-else-if="!metricsLoading && selectedVms.length === 0" description="请选择要监控的虚拟机" :image-size="80" />
     <el-empty v-else-if="!metricsLoading && loaded && !hasData" description="暂无监控数据" :image-size="80" />
   </div>
 </template>
 
 <script setup>
-import { ref, computed, inject, onMounted, onBeforeUnmount, nextTick, watch } from 'vue'
+import { ref, computed, inject, onMounted, onBeforeUnmount, nextTick } from 'vue'
 import { ElMessage } from 'element-plus'
 import { getVmList, getMetricsHistory } from '@/api/admin/kvmService'
 import { extractApiError } from '@/utils/kvmErrorUtil'
@@ -99,47 +91,38 @@ const selectedMetrics = ref(['cpu', 'memory'])
 const metricsLoading = ref(false)
 const loaded = ref(false)
 const metricsDataMap = ref({})
+const timeRange = ref(60)
+const autoRefreshInterval = ref(0)
+let autoRefreshTimer = null
 
 const metricLabels = {
   cpu: 'CPU 使用率',
   memory: '内存使用',
-  disk: '磁盘 IO 速率',
-  network: '网络流量速率'
+  disk: '磁盘IO速率',
+  network: '网络速率'
 }
 
-const dateShortcuts = [
-  { text: '最近10分钟', value: () => { const e = new Date(); return [new Date(e - 10 * 60 * 1000), e] } },
-  { text: '最近30分钟', value: () => { const e = new Date(); return [new Date(e - 30 * 60 * 1000), e] } },
-  { text: '最近1小时', value: () => { const e = new Date(); return [new Date(e - 60 * 60 * 1000), e] } },
-  { text: '最近3小时', value: () => { const e = new Date(); return [new Date(e - 3 * 60 * 60 * 1000), e] } },
-  { text: '最近6小时', value: () => { const e = new Date(); return [new Date(e - 6 * 60 * 60 * 1000), e] } },
-  { text: '最近24小时', value: () => { const e = new Date(); return [new Date(e - 24 * 60 * 60 * 1000), e] } },
-]
-
-const now = new Date()
-const dateRange = ref([new Date(now - 60 * 60 * 1000), now])
+const vmColors = ['#409eff', '#67c23a', '#e6a23c', '#f56c6c', '#909399', '#b37feb', '#36cfc9', '#ff85c0', '#ffc53d', '#597ef7']
 
 const hasData = computed(() => Object.keys(metricsDataMap.value).length > 0)
 
 const chartInstances = {}
+const chartElements = {}
 
-const setChartRef = (metric, vmName, el) => {
-  const key = `${metric}-${vmName}`
+const setChartRef = (metric, el) => {
   if (el) {
+    chartElements[metric] = el
     nextTick(() => {
-      if (!chartInstances[key]) {
-        chartInstances[key] = echarts.init(el)
+      if (!chartInstances[metric]) {
+        chartInstances[metric] = echarts.init(el)
       }
     })
   }
 }
 
-const selectAllVms = () => {
-  selectedVms.value = vmOptions.value.map(v => v.name)
-}
+const selectAllVms = () => { selectedVms.value = vmOptions.value.map(v => v.name) }
 
-const calcInterval = (start, end) => {
-  const ms = end - start
+const calcInterval = (ms) => {
   if (ms <= 10 * 60 * 1000) return '1m'
   if (ms <= 30 * 60 * 1000) return '3m'
   if (ms <= 60 * 60 * 1000) return '5m'
@@ -147,8 +130,26 @@ const calcInterval = (start, end) => {
   if (ms <= 6 * 3600 * 1000) return '20m'
   if (ms <= 12 * 3600 * 1000) return '30m'
   if (ms <= 24 * 3600 * 1000) return '1h'
-  if (ms <= 72 * 3600 * 1000) return '3h'
-  return '1d'
+  return '3h'
+}
+
+const formatBytes = (val) => {
+  if (!val && val !== 0) return '0 B'
+  val = Math.abs(Number(val))
+  if (val >= 1073741824) return (val / 1073741824).toFixed(2) + ' GB'
+  if (val >= 1048576) return (val / 1048576).toFixed(2) + ' MB'
+  if (val >= 1024) return (val / 1024).toFixed(1) + ' KB'
+  return val.toFixed(0) + ' B'
+}
+
+const formatBytesPerSec = (val) => formatBytes(val) + '/s'
+
+const formatMemKiB = (kib) => {
+  if (!kib && kib !== 0) return '0'
+  kib = Math.abs(Number(kib))
+  if (kib >= 1048576) return (kib / 1048576).toFixed(1) + ' GB'
+  if (kib >= 1024) return (kib / 1024).toFixed(0) + ' MB'
+  return kib.toFixed(0) + ' KB'
 }
 
 const loadVmList = async () => {
@@ -168,30 +169,25 @@ const loadVmList = async () => {
   }
 }
 
-const loadAllMetrics = async () => {
+const handleRefresh = async () => {
   if (!selectedVms.value.length) return
-  if (!dateRange.value || dateRange.value.length < 2) {
-    ElMessage.warning('请选择时间范围')
-    return
-  }
   metricsLoading.value = true
-  const startTime = new Date(dateRange.value[0])
-  const endTime = new Date(dateRange.value[1])
-  const interval = calcInterval(startTime, endTime)
+  const endTime = new Date()
+  const startTime = new Date(endTime - timeRange.value * 60 * 1000)
+  const interval = calcInterval(endTime - startTime)
 
   const dataMap = {}
   try {
-    const requests = selectedVms.value.map(async (vmName) => {
+    await Promise.all(selectedVms.value.map(async (vmName) => {
       try {
-        const params = {
+        const res = await getMetricsHistory({
           service_id: serviceId.value,
           host_id: hostId.value,
           vm_name: vmName,
           start: startTime.toISOString(),
           end_time: endTime.toISOString(),
           interval
-        }
-        const res = await getMetricsHistory(params)
+        })
         const body = res?.data
         if (body?.code === 200 && body?.data) {
           dataMap[vmName] = Array.isArray(body.data) ? body.data : (body.data.data || [])
@@ -199,8 +195,7 @@ const loadAllMetrics = async () => {
       } catch (e) {
         console.warn(`获取 ${vmName} 监控数据失败:`, e)
       }
-    })
-    await Promise.all(requests)
+    }))
     metricsDataMap.value = dataMap
     loaded.value = true
     await nextTick()
@@ -213,99 +208,137 @@ const loadAllMetrics = async () => {
 }
 
 const renderCharts = () => {
-  const spanMs = dateRange.value ? (new Date(dateRange.value[1]).getTime() - new Date(dateRange.value[0]).getTime()) : 0
-  const showDate = spanMs >= 12 * 3600 * 1000
+  const showDate = timeRange.value >= 720
   const labelRotate = showDate ? 30 : 0
 
   for (const metric of selectedMetrics.value) {
-    for (const vmName of selectedVms.value) {
-      const key = `${metric}-${vmName}`
-      const chart = chartInstances[key]
+    const chart = chartInstances[metric]
+    if (!chart) continue
+
+    const allTimes = getUnifiedTimeline()
+    if (!allTimes.length) continue
+
+    const timeLabels = allTimes.map(t => {
+      const date = new Date(t)
+      if (showDate) return date.toLocaleDateString('zh-CN', { month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' })
+      return date.toLocaleTimeString('zh-CN', { hour12: false, hour: '2-digit', minute: '2-digit', second: '2-digit' })
+    })
+
+    const seriesList = []
+    selectedVms.value.forEach((vmName, idx) => {
       const metrics = metricsDataMap.value[vmName]
-      if (!chart || !metrics || !metrics.length) continue
+      if (!metrics || !metrics.length) return
+      const color = vmColors[idx % vmColors.length]
+      const vmData = buildMetricData(metric, metrics, allTimes)
+      seriesList.push({ name: vmName, data: vmData, color })
+    })
 
-      const times = metrics.map(m => {
-        const date = new Date(m.bucket)
-        if (showDate) return date.toLocaleDateString('zh-CN', { month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' })
-        return date.toLocaleTimeString('zh-CN', { hour12: false, hour: '2-digit', minute: '2-digit' })
-      })
+    if (!seriesList.length) continue
 
-      let option = null
-      if (metric === 'cpu') {
-        option = buildLineOption(times, [
-          { name: 'CPU使用率', data: metrics.map(m => +(m.cpu_usage ?? 0).toFixed(1)), color: '#409eff' }
-        ], '%', labelRotate)
-      } else if (metric === 'memory') {
-        const memTotal = Math.max(...metrics.map(m => m.mem_total ?? 0))
-        const unit = memTotal >= 1048576 ? 'GB' : memTotal >= 1024 ? 'MB' : 'KB'
-        const divisor = memTotal >= 1048576 ? 1048576 : memTotal >= 1024 ? 1024 : 1
-        option = buildLineOption(times, [
-          { name: '已用内存', data: metrics.map(m => +((m.mem_used ?? 0) / divisor).toFixed(2)), color: '#e6a23c' },
-          { name: '总内存', data: metrics.map(m => +((m.mem_total ?? 0) / divisor).toFixed(2)), color: '#c0c4cc', lineStyle: { type: 'dashed' } }
-        ], unit, labelRotate)
-      } else if (metric === 'disk') {
-        const diskReadRate = []; const diskWriteRate = []
-        for (let i = 0; i < metrics.length; i++) {
-          if (i === 0) { diskReadRate.push(0); diskWriteRate.push(0); continue }
-          const dt = (new Date(metrics[i].bucket) - new Date(metrics[i - 1].bucket)) / 1000
-          if (dt > 0) {
-            diskReadRate.push(+Math.max(0, ((metrics[i].disk_read ?? 0) - (metrics[i - 1].disk_read ?? 0)) / dt / 1024).toFixed(2))
-            diskWriteRate.push(+Math.max(0, ((metrics[i].disk_write ?? 0) - (metrics[i - 1].disk_write ?? 0)) / dt / 1024).toFixed(2))
-          } else { diskReadRate.push(0); diskWriteRate.push(0) }
-        }
-        option = buildLineOption(times, [
-          { name: '读取', data: diskReadRate, color: '#67c23a' },
-          { name: '写入', data: diskWriteRate, color: '#f56c6c' }
-        ], 'KB/s', labelRotate)
-      } else if (metric === 'network') {
-        const netRxRate = []; const netTxRate = []
-        for (let i = 0; i < metrics.length; i++) {
-          if (i === 0) { netRxRate.push(0); netTxRate.push(0); continue }
-          const dt = (new Date(metrics[i].bucket) - new Date(metrics[i - 1].bucket)) / 1000
-          if (dt > 0) {
-            netRxRate.push(+Math.max(0, ((metrics[i].net_rx ?? 0) - (metrics[i - 1].net_rx ?? 0)) / dt / 1024).toFixed(2))
-            netTxRate.push(+Math.max(0, ((metrics[i].net_tx ?? 0) - (metrics[i - 1].net_tx ?? 0)) / dt / 1024).toFixed(2))
-          } else { netRxRate.push(0); netTxRate.push(0) }
-        }
-        option = buildLineOption(times, [
-          { name: '接收', data: netRxRate, color: '#409eff' },
-          { name: '发送', data: netTxRate, color: '#e6a23c' }
-        ], 'KB/s', labelRotate)
-      }
-
-      if (option) {
-        chart.setOption(option, true)
-        chart.resize()
-      }
+    let yAxisFormatter, tooltipUnit
+    if (metric === 'cpu') {
+      yAxisFormatter = v => v.toFixed(0) + '%'
+      tooltipUnit = '%'
+    } else if (metric === 'memory') {
+      yAxisFormatter = v => formatMemKiB(v)
+      tooltipUnit = 'KiB'
+    } else if (metric === 'disk') {
+      yAxisFormatter = v => formatBytesPerSec(v)
+      tooltipUnit = '/s'
+    } else {
+      yAxisFormatter = v => formatBytesPerSec(v)
+      tooltipUnit = '/s'
     }
+
+    chart.setOption({
+      tooltip: {
+        trigger: 'axis',
+        formatter: (params) => {
+          let s = params[0]?.axisValue || ''
+          params.forEach(p => {
+            let val
+            if (metric === 'cpu') val = (p.value ?? 0).toFixed(1) + '%'
+            else if (metric === 'memory') val = formatMemKiB(p.value)
+            else val = formatBytesPerSec(p.value)
+            s += `<br/>${p.marker} ${p.seriesName}: ${val}`
+          })
+          return s
+        }
+      },
+      legend: { top: 4, right: 8, textStyle: { fontSize: 11 }, type: 'scroll' },
+      grid: { top: 40, left: 70, right: 16, bottom: labelRotate > 0 ? 55 : 35 },
+      xAxis: {
+        type: 'category', data: timeLabels, boundaryGap: false,
+        axisLabel: { fontSize: 10, rotate: labelRotate, color: '#86909c' },
+        axisLine: { lineStyle: { color: '#e8e8e8' } }
+      },
+      yAxis: {
+        type: 'value', min: 0,
+        max: metric === 'cpu' ? 100 : undefined,
+        axisLabel: { fontSize: 10, formatter: yAxisFormatter, color: '#86909c' },
+        splitLine: { lineStyle: { color: '#f0f0f0' } }
+      },
+      series: seriesList.map(s => ({
+        name: s.name,
+        type: 'line',
+        data: s.data,
+        smooth: true,
+        symbol: 'none',
+        lineStyle: { width: 1.5 },
+        itemStyle: { color: s.color },
+        areaStyle: seriesList.length <= 3
+          ? { color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ offset: 0, color: s.color + '20' }, { offset: 1, color: s.color + '02' }]) }
+          : undefined
+      }))
+    }, true)
+    chart.resize()
   }
 }
 
-const buildLineOption = (xData, series, yUnit, labelRotate = 0) => ({
-  tooltip: { trigger: 'axis', axisPointer: { type: 'cross' } },
-  legend: { top: 4, right: 8, textStyle: { fontSize: 11 } },
-  grid: { top: 36, left: 50, right: 16, bottom: labelRotate > 0 ? 50 : 30 },
-  xAxis: {
-    type: 'category', data: xData, boundaryGap: false,
-    axisLabel: { fontSize: 10, rotate: labelRotate, color: '#86909c' },
-    axisLine: { lineStyle: { color: '#e8e8e8' } }
-  },
-  yAxis: {
-    type: 'value',
-    axisLabel: { fontSize: 10, formatter: v => v + (yUnit ? ` ${yUnit}` : ''), color: '#86909c' },
-    splitLine: { lineStyle: { color: '#f0f0f0' } }
-  },
-  series: series.map(s => ({
-    name: s.name,
-    type: 'line',
-    data: s.data,
-    smooth: true,
-    symbol: 'none',
-    lineStyle: { width: 1.5, ...(s.lineStyle || {}) },
-    itemStyle: { color: s.color },
-    areaStyle: s.lineStyle?.type === 'dashed' ? undefined : { color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ offset: 0, color: s.color + '30' }, { offset: 1, color: s.color + '05' }]) }
-  }))
-})
+const getUnifiedTimeline = () => {
+  const timeSet = new Set()
+  for (const vmName of selectedVms.value) {
+    const data = metricsDataMap.value[vmName]
+    if (data) data.forEach(m => timeSet.add(m.bucket))
+  }
+  return Array.from(timeSet).sort()
+}
+
+const buildMetricData = (metric, metrics, allTimes) => {
+  const timeMap = new Map()
+  metrics.forEach((m, i) => timeMap.set(m.bucket, { ...m, _idx: i }))
+
+  return allTimes.map((t, tIdx) => {
+    const m = timeMap.get(t)
+    if (!m) return null
+
+    if (metric === 'cpu') {
+      return +(m.cpu_usage ?? 0).toFixed(1)
+    } else if (metric === 'memory') {
+      return +(m.mem_used ?? 0)
+    } else if (metric === 'disk') {
+      // disk_read/disk_write are cumulative Bytes, compute rate via diff
+      if (m._idx === 0) return 0
+      const prev = metrics[m._idx - 1]
+      const dt = (new Date(m.bucket) - new Date(prev.bucket)) / 1000
+      if (dt <= 0) return 0
+      const readRate = Math.max(0, ((m.disk_read ?? 0) - (prev.disk_read ?? 0)) / dt)
+      const writeRate = Math.max(0, ((m.disk_write ?? 0) - (prev.disk_write ?? 0)) / dt)
+      return +(readRate + writeRate).toFixed(0)
+    } else if (metric === 'network') {
+      // net_rx/net_tx are already Bytes/s
+      return +((m.net_rx ?? 0) + (m.net_tx ?? 0)).toFixed(0)
+    }
+    return 0
+  })
+}
+
+const resetAutoRefresh = () => {
+  if (autoRefreshTimer) { clearInterval(autoRefreshTimer); autoRefreshTimer = null }
+  if (autoRefreshInterval.value > 0) {
+    autoRefreshTimer = setInterval(() => handleRefresh(), autoRefreshInterval.value * 1000)
+  }
+}
 
 const disposeCharts = () => {
   Object.values(chartInstances).forEach(c => { try { c.dispose() } catch {} })
@@ -322,6 +355,7 @@ onMounted(() => {
 })
 
 onBeforeUnmount(() => {
+  if (autoRefreshTimer) clearInterval(autoRefreshTimer)
   disposeCharts()
   window.removeEventListener('resize', handleResize)
 })
@@ -364,44 +398,26 @@ defineExpose({ loadVmList, loadList: loadVmList })
 
 .charts-area { margin-top: 8px; }
 
-.metric-section { margin-bottom: 24px; }
+.chart-section { margin-bottom: 20px; }
 
-.metric-section-title {
-  font-size: 15px;
+.chart-section-title {
+  font-size: 14px;
   font-weight: 600;
   color: #1d2129;
-  margin: 0 0 12px;
+  margin: 0 0 8px;
   padding-left: 8px;
   border-left: 3px solid #409eff;
 }
 
-.charts-grid {
-  display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
-  gap: 16px;
-}
-
-.chart-card {
+.chart-wrapper {
   background: #fff;
   border: 1px solid #e8e8e8;
   border-radius: 6px;
   padding: 12px 16px;
 }
 
-.chart-card-header {
-  display: flex;
-  align-items: center;
-  margin-bottom: 4px;
-}
-
-.chart-vm-name {
-  font-size: 13px;
-  font-weight: 500;
-  color: #303133;
-}
-
 .chart-box {
   width: 100%;
-  height: 200px;
+  height: 260px;
 }
 </style>