diff --git a/public/js/app.js b/public/js/app.js
index 21fabc0..30f80ab 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -161,7 +161,7 @@
         networkChart.draw();
       });
     }
-    
+
     // Source filter listener
     if (dom.sourceFilter) {
       dom.sourceFilter.addEventListener('change', () => {
@@ -346,22 +346,22 @@
   // ---- Update Dashboard ----
   function updateDashboard(data) {
     // Server count
-    dom.totalServers.textContent = `${data.activeServers} / ${data.totalServers}`;
+    dom.totalServers.textContent = `${data.activeServers}/${data.totalServers}`;
 
     // CPU
     const cpuPct = data.cpu.percent;
     dom.cpuPercent.textContent = formatPercent(cpuPct);
-    dom.cpuDetail.textContent = `${data.cpu.used.toFixed(1)} / ${data.cpu.total.toFixed(0)} 核心`;
+    dom.cpuDetail.textContent = `${data.cpu.used.toFixed(1)}/${data.cpu.total.toFixed(0)} 核心`;
 
     // Memory
     const memPct = data.memory.percent;
     dom.memPercent.textContent = formatPercent(memPct);
-    dom.memDetail.textContent = `${formatBytes(data.memory.used)} / ${formatBytes(data.memory.total)}`;
+    dom.memDetail.textContent = `${formatBytes(data.memory.used)}/${formatBytes(data.memory.total)}`;
 
     // Disk
     const diskPct = data.disk.percent;
     dom.diskPercent.textContent = formatPercent(diskPct);
-    dom.diskDetail.textContent = `${formatBytes(data.disk.used)} / ${formatBytes(data.disk.total)}`;
+    dom.diskDetail.textContent = `${formatBytes(data.disk.used)}/${formatBytes(data.disk.total)}`;
 
     // Bandwidth
     dom.totalBandwidth.textContent = formatBandwidth(data.network.total || 0);
@@ -392,7 +392,7 @@
     if (currentSourceFilter !== 'all') {
       filtered = allServersData.filter(s => s.source === currentSourceFilter);
     }
-    
+
     // Sort servers: online first, then alphabetically by name (job)
     filtered.sort((a, b) => {
       if (a.up !== b.up) return a.up ? -1 : 1;
@@ -403,7 +403,7 @@
 
     const totalFiltered = filtered.length;
     const totalPages = Math.ceil(totalFiltered / pageSize) || 1;
-    
+
     if (currentPage > totalPages) currentPage = totalPages;
 
     const startIndex = (currentPage - 1) * pageSize;
@@ -415,7 +415,7 @@
 
   function renderPagination(totalPages) {
     if (!dom.paginationControls) return;
-    
+
     if (totalPages <= 1) {
       dom.paginationControls.innerHTML = '';
       return;
@@ -424,25 +424,25 @@
     let html = '';
     // Previous button
     html += `<button class="page-btn" ${currentPage === 1 ? 'disabled' : ''} onclick="changePage(${currentPage - 1})">上页</button>`;
-    
+
     // Page numbers
     for (let i = 1; i <= totalPages; i++) {
-        if (i === 1 || i === totalPages || (i >= currentPage - 2 && i <= currentPage + 2)) {
-            html += `<button class="page-btn ${i === currentPage ? 'active' : ''}" onclick="changePage(${i})">${i}</button>`;
-        } else if (i === currentPage - 3 || i === currentPage + 3) {
-            html += `<span style="color: var(--text-muted); padding: 0 4px;">...</span>`;
-        }
+      if (i === 1 || i === totalPages || (i >= currentPage - 2 && i <= currentPage + 2)) {
+        html += `<button class="page-btn ${i === currentPage ? 'active' : ''}" onclick="changePage(${i})">${i}</button>`;
+      } else if (i === currentPage - 3 || i === currentPage + 3) {
+        html += `<span style="color: var(--text-muted); padding: 0 4px;">...</span>`;
+      }
     }
 
     // Next button
     html += `<button class="page-btn" ${currentPage === totalPages ? 'disabled' : ''} onclick="changePage(${currentPage + 1})">下页</button>`;
-    
+
     dom.paginationControls.innerHTML = html;
   }
 
-  window.changePage = function(page) {
-      currentPage = page;
-      renderFilteredServers();
+  window.changePage = function (page) {
+    currentPage = page;
+    renderFilteredServers();
   };
 
   // ---- Server Table ----
@@ -548,24 +548,22 @@
 
     // Define metrics to show
     const cpuValueHtml = `
-        <div style="display: flex; flex-direction: column; align-items: flex-end; gap: 2px;">
-            <span style="font-weight: 700;">${formatPercent(data.cpuBusy)}</span>
-            <div style="font-size: 0.65rem; color: var(--text-secondary); display: flex; gap: 6px; font-weight: normal;">
-                <span>I/O Wait: ${data.cpuIowait.toFixed(1)}%</span>
-            </div>
+        <div style="display: flex; align-items: baseline; gap: 8px;">
+            <span style="font-weight: 700; font-size: 1.1rem;">${formatPercent(data.cpuBusy)}</span>
+            <span style="font-size: 0.7rem; color: var(--text-secondary); font-weight: normal;">(IO Wait: ${data.cpuIowait.toFixed(1)}%)</span>
         </div>
     `;
 
     const metrics = [
-        { key: 'cpuBusy', label: 'CPU 使用率 (Busy / IO Wait)', value: cpuValueHtml },
-        { key: 'sysLoad', label: '系统负载 (Load)', value: data.sysLoad.toFixed(1) + '%' },
-        { key: 'memUsedPct', label: '内存使用率 (RAM)', value: formatPercent(data.memUsedPct) },
-        { key: 'swapUsedPct', label: 'SWAP 使用率', value: formatPercent(data.swapUsedPct) },
-        { key: 'rootFsUsedPct', label: '根分区使用率 (/)', value: formatPercent(data.rootFsUsedPct) },
-        { key: 'netRx', label: '网络接收速率 (RX)', value: formatBandwidth(data.netRx) },
-        { key: 'netTx', label: '网络发送速率 (TX)', value: formatBandwidth(data.netTx) },
-        { key: 'sockstatTcp', label: 'TCP 链接数 (Sockstat)', value: data.sockstatTcp.toFixed(0) },
-        { key: 'sockstatTcpMem', label: 'TCP 内存占用', value: formatBytes(data.sockstatTcpMem) }
+      { key: 'cpuBusy', label: 'CPU 使用率', value: cpuValueHtml },
+      { key: 'sysLoad', label: '系统负载 (Load)', value: data.sysLoad.toFixed(1) + '%' },
+      { key: 'memUsedPct', label: '内存使用率 (RAM)', value: formatPercent(data.memUsedPct) },
+      { key: 'swapUsedPct', label: 'SWAP 使用率', value: formatPercent(data.swapUsedPct) },
+      { key: 'rootFsUsedPct', label: '根分区使用率 (/)', value: formatPercent(data.rootFsUsedPct) },
+      { key: 'netRx', label: '网络接收速率 (RX)', value: formatBandwidth(data.netRx) },
+      { key: 'netTx', label: '网络发送速率 (TX)', value: formatBandwidth(data.netTx) },
+      { key: 'sockstatTcp', label: 'TCP 链接数 (Sockstat)', value: data.sockstatTcp.toFixed(0) },
+      { key: 'sockstatTcpMem', label: 'TCP 内存占用', value: formatBytes(data.sockstatTcpMem) }
     ];
 
     dom.detailMetricsList.innerHTML = metrics.map(m => `
@@ -642,7 +640,7 @@
       if (metricKey.includes('Pct') || metricKey === 'cpuBusy') unit = '%';
       if (metricKey.startsWith('net')) unit = 'B/s';
       if (metricKey === 'sockstatTcpMem') unit = 'B';
-      
+
       chart = new MetricChart(canvas, unit);
       currentServerDetail.charts[metricKey] = chart;
     }
@@ -660,6 +658,14 @@
       const res = await fetch(url);
       if (!res.ok) throw new Error('Query failed');
       const data = await res.json();
+
+      if (metricKey === 'cpuBusy' && data.series) {
+        // Simplify: ONLY show total busy CPU usage (everything except idle)
+        // Since it's a percentage, 100 - idle is the total busy percentage
+        data.values = data.series.idle.map(idleVal => Math.max(0, 100 - idleVal));
+        data.series = null; // This tells MetricChart to draw a single line instead of stacked area
+      }
+
       chart.setData(data);
     } catch (err) {
       console.error(`Error loading history for ${metricKey}:`, err);