diff --git a/server/web/index.html b/server/web/index.html
index e1d7963..2fbe649 100644
--- a/server/web/index.html
+++ b/server/web/index.html
@@ -829,6 +829,17 @@
         .toolbar-btn:disabled { opacity: 0.3; cursor: not-allowed; }
         .toolbar-btn:disabled:hover { background: transparent; }
         .toolbar-btn:disabled:active { transform: none; }
+        /* Throughput read-out inside the floating toolbar (fullscreen mode).
+           Hidden automatically while empty so the toolbar collapses cleanly. */
+        .fb-stats {
+            color: rgba(255,255,255,0.9);
+            font-size: 12px;
+            padding: 0 10px 0 6px;
+            font-variant-numeric: tabular-nums;
+            white-space: nowrap;
+            user-select: none;
+        }
+        .fb-stats:empty { display: none; }
         .toolbar-toggle {
             position: fixed;
             /* 同 .floating-toolbar：8px 基础 + 安全区 inset 避开刘海/灵动岛 */
@@ -1205,10 +1216,12 @@
         <div class="touch-indicator" id="touch-indicator"></div>
         <button class="toolbar-toggle" id="toolbar-toggle" onclick="toggleFloatingToolbar()">&#x2022;&#x2022;&#x2022;</button>
         <div class="floating-toolbar" id="floating-toolbar">
+            <span class="fb-stats" id="fb-stats"></span>
             <button class="toolbar-btn" onclick="sendRdpReset()" title="RDP Reset">&#x21BB;</button>
             <button class="toolbar-btn" id="btn-mouse" onclick="toggleControl()" title="Mouse Control">&#x1F5B1;</button>
             <button class="toolbar-btn" id="btn-keyboard" onclick="toggleKeyboard()" title="Keyboard" disabled>&#x2328;</button>
             <button class="toolbar-btn" onclick="disconnect()" title="Disconnect">&#x2715;</button>
+            <button class="toolbar-btn" onclick="toggleFloatingToolbar()" title="Collapse">&#x25B4;</button>
         </div>
         <div class="zoom-indicator" id="zoom-indicator">100%</div>
         <input type="text" id="mobile-keyboard" style="position:fixed;left:-9999px;opacity:0;" autocomplete="off" autocorrect="off" autocapitalize="off">
@@ -1291,6 +1304,12 @@
     <script>
         let ws = null, token = null, decoder = null, devices = [], currentDevice = null;
         let frameCount = 0, lastFrameTime = 0, fps = 0, pingInterval = null;
+        // FPS 计数：原始风格——decoder.onOutput 里 ++，每经过 1 秒采样一次。
+        // 简单直接，与本次会话改动前一致。
+        // 网络流量统计：handleBinaryFrame 累加，每 1 秒钟 renderStats 读出
+        let bwBytesAccum = 0;       // current-second byte accumulator
+        let bwBytesPerSec = 0;      // last second's throughput (bytes/sec)
+        let currentWidth = 0, currentHeight = 0;  // captured at frame decode time
         const canvas = document.getElementById('screen-canvas');
         const ctx = canvas.getContext('2d');
 
@@ -1678,8 +1697,12 @@
             // Set up vertical flip transform once (BMP is bottom-up)
             ctx.setTransform(1, 0, 0, -1, 0, height);
             if (decoder) { try { decoder.close(); } catch(e) {} }
-            frameCount = 0;
-            lastFrameTime = performance.now();
+            // Reset FPS sliding window on decoder (re)init so a resolution
+            // change or codec switch doesn't carry over stale counts.
+            frameCount = 0; lastFrameTime = performance.now(); fps = 0;
+            // 记录当前分辨率供 renderStats 重组 frame-info 文案
+            currentWidth = width;
+            currentHeight = height;
             decoder = new VideoDecoder({
                 output: (frame) => {
                     // Check if frame dimensions match canvas
@@ -1688,13 +1711,13 @@
                     }
                     ctx.drawImage(frame, 0, 0);
                     frame.close();
+                    // 原始风格的 FPS 计数：1 秒采样窗口
                     frameCount++;
                     const now = performance.now();
                     if (now - lastFrameTime >= 1000) {
                         fps = Math.round(frameCount * 1000 / (now - lastFrameTime));
                         frameCount = 0;
                         lastFrameTime = now;
-                        document.getElementById('frame-info').textContent = width + 'x' + height + ' @ ' + fps + ' fps';
                     }
                 },
                 error: (e) => { console.error('Decoder error:', e); needKeyframe = true; }
@@ -1994,6 +2017,8 @@
         }
 
         function handleBinaryFrame(data) {
+            // 全部进入的二进制都计入带宽统计：视频帧 + 音频帧 + 终端帧
+            bwBytesAccum += data.byteLength;
             // 终端输出帧：4 字节 magic 'TRM1' (0x54 0x52 0x4D 0x31) → 转发到 xterm。
             const u8 = new Uint8Array(data);
             if (u8.length >= 4 &&
@@ -2475,6 +2500,12 @@
             currentDevice = dev;
             document.getElementById('device-name').textContent = currentDevice.name;
             document.getElementById('frame-info').textContent = '';
+            // Reset throughput / resolution read-outs for the new session
+            currentWidth = 0; currentHeight = 0;
+            bwBytesAccum = 0; bwBytesPerSec = 0;
+            frameCount = 0; lastFrameTime = performance.now(); fps = 0;
+            const fbs = document.getElementById('fb-stats');
+            if (fbs) fbs.textContent = '';
             updateScreenStatus('connecting');
             // Default the audio button to "on" optimistically; server will
             // correct via connect_result.audio_enabled or audio_state event.
@@ -2826,6 +2857,39 @@
             }
         }
 
+        // Pretty-print bytes/sec with a compact 1-byte / 1K / 1M scale.
+        function formatBandwidth(bytesPerSec) {
+            if (bytesPerSec < 1024) return bytesPerSec + 'B/s';
+            if (bytesPerSec < 1024 * 1024) return Math.round(bytesPerSec / 1024) + 'K/s';
+            return (bytesPerSec / 1024 / 1024).toFixed(1) + 'M/s';
+        }
+
+        // 1-second ticker that pulls the FPS/bandwidth counters and refreshes
+        // the two read-outs: #frame-info (always visible above the canvas) and
+        // #fb-stats (a chip inside the floating toolbar, only visible while
+        // the toolbar is expanded — that's how the fullscreen mode shows
+        // throughput without cluttering the screen).
+        function renderStats() {
+            // FPS 已经在 decoder.onOutput 里就地更新，renderStats 只负责
+            // 把最新的 fps、bandwidth 组装成显示串写到 DOM。
+
+            bwBytesPerSec = bwBytesAccum;
+            bwBytesAccum = 0;
+
+            const fi = document.getElementById('frame-info');
+            const fs = document.getElementById('fb-stats');
+            if (currentWidth > 0 && currentHeight > 0) {
+                const bw = formatBandwidth(bwBytesPerSec);
+                if (fi) fi.textContent = currentWidth + 'x' + currentHeight +
+                                          ' @ ' + fps + ' fps · ' + bw;
+                if (fs) fs.textContent = bw;
+            } else {
+                if (fi) fi.textContent = '';
+                if (fs) fs.textContent = '';
+            }
+        }
+        setInterval(renderStats, 1000);
+
         function isLandscape() {
             return window.innerWidth > window.innerHeight;
         }
@@ -3816,6 +3880,10 @@
         });
 
         function disconnect() {
+            // Reset throughput / resolution read-outs
+            currentWidth = 0; currentHeight = 0;
+            bwBytesAccum = 0; bwBytesPerSec = 0;
+            frameCount = 0; lastFrameTime = performance.now(); fps = 0;
             // Reset control mode
             controlEnabled = false;
             // Reset keyboard state (blur event will update button state)