diff --git a/Build/Build/c1ac39c2807bce9c7f9071edf08b1ab0.data.gz b/Build/Build/d1e2d1e3e120229ced20d8237eae353c.data.gz
similarity index 99%
rename from Build/Build/c1ac39c2807bce9c7f9071edf08b1ab0.data.gz
rename to Build/Build/d1e2d1e3e120229ced20d8237eae353c.data.gz
index 94a57c8..9b486ee 100644
Binary files a/Build/Build/c1ac39c2807bce9c7f9071edf08b1ab0.data.gz and b/Build/Build/d1e2d1e3e120229ced20d8237eae353c.data.gz differ
diff --git a/Build/ServiceWorker.js b/Build/ServiceWorker.js
index cc3c0f7..3cf7e0e 100644
--- a/Build/ServiceWorker.js
+++ b/Build/ServiceWorker.js
@@ -2,7 +2,7 @@ const cacheName = "DefaultCompany-运动伤害现场急救虚拟仿真实验-0.1
 const contentToCache = [
     "Build/7a2dbded24d57e056180125b1583e7c4.loader.js",
     "Build/62981e01aece13a94bac539c85228c75.framework.js.gz",
-    "Build/c1ac39c2807bce9c7f9071edf08b1ab0.data.gz",
+    "Build/d1e2d1e3e120229ced20d8237eae353c.data.gz",
     "Build/e89ebbd31642308ad16cecffa889584e.wasm.gz",
     "TemplateData/style.css"
 
diff --git a/Build/index.html b/Build/index.html
index 5a580b2..2fad02c 100644
--- a/Build/index.html
+++ b/Build/index.html
@@ -59,7 +59,7 @@
       var buildUrl = "Build";
       var loaderUrl = buildUrl + "/7a2dbded24d57e056180125b1583e7c4.loader.js";
       var config = {
-        dataUrl: buildUrl + "/c1ac39c2807bce9c7f9071edf08b1ab0.data.gz",
+        dataUrl: buildUrl + "/d1e2d1e3e120229ced20d8237eae353c.data.gz",
         frameworkUrl: buildUrl + "/62981e01aece13a94bac539c85228c75.framework.js.gz",
         codeUrl: buildUrl + "/e89ebbd31642308ad16cecffa889584e.wasm.gz",
         streamingAssetsUrl: "StreamingAssets",
@@ -75,6 +75,7 @@
         }
         return "must-revalidate";
       };
+      config.devicePixelRatio = Math.min(window.devicePixelRatio || 1, 1.5);
 
       // By default Unity keeps WebGL canvas render target size matched with
       // the DOM size of the canvas element (scaled by window.devicePixelRatio)
diff --git a/Build/server.js b/Build/server.js
index b48702d..7d2f9eb 100644
--- a/Build/server.js
+++ b/Build/server.js
@@ -117,6 +117,32 @@ function serveIndex(res) {
     // 注入到 </head> 之前的 CSS
     const css = `
     <style>
+      html, body {
+        width: 100%;
+        height: 100%;
+        overflow: hidden;
+        background: #0d0a0b;
+      }
+      #unity-container {
+        position: fixed;
+        inset: 0;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        background: #0d0a0b;
+      }
+      #unity-canvas {
+        width: min(100vw, 177.7778vh) !important;
+        height: min(56.25vw, 100vh) !important;
+        aspect-ratio: 16 / 9;
+        background: #231f20;
+        display: block;
+      }
+      #unity-loading-bar {
+        left: 50% !important;
+        top: 50% !important;
+        transform: translate(-50%, -50%) !important;
+      }
       #landing-overlay {
         position: fixed; inset: 0; z-index: 9999;
         display: flex; flex-direction: column;
@@ -157,15 +183,51 @@ function serveIndex(res) {
         box-shadow: 0 12px 40px rgba(74, 144, 217, 0.5);
       }
       #landing-btn:active { transform: translateY(0) scale(0.98); }
+      #landing-btn:disabled {
+        cursor: default;
+        opacity: 0.48;
+        transform: none;
+        box-shadow: none;
+        background: linear-gradient(135deg, #4b5563 0%, #374151 100%);
+      }
+      #landing-progress {
+        width: min(420px, 72vw);
+        height: 8px;
+        margin-top: 28px;
+        border-radius: 999px;
+        overflow: hidden;
+        background: rgba(255,255,255,0.14);
+      }
+      #landing-progress-fill {
+        width: 0%;
+        height: 100%;
+        border-radius: inherit;
+        background: linear-gradient(90deg, #4a90d9 0%, #7dd3fc 100%);
+        transition: width 0.2s ease;
+      }
+      #landing-progress-text {
+        margin-top: 12px;
+        min-height: 18px;
+        font-size: 13px;
+        color: rgba(255,255,255,0.52);
+        letter-spacing: 0.08em;
+      }
       #landing-btn .arrow {
         display: inline-block; font-size: 1.2em;
         transition: transform 0.2s ease;
       }
       #landing-btn:hover .arrow { transform: translateX(4px); }
+      #landing-btn:disabled .arrow { transform: none; }
       #landing-overlay .hint {
         margin-top: 40px; font-size: 13px;
         color: rgba(255,255,255,0.25); letter-spacing: 0.05em;
       }
+      @media (orientation: portrait) {
+        #landing-overlay .logo-area { margin-bottom: 34px; }
+        #landing-overlay .logo-area .icon { width: 84px; height: 84px; margin-bottom: 22px; }
+        #landing-btn { padding: 14px 32px; }
+        #landing-overlay .hint { margin-top: 24px; }
+      }
     </style>`;
 
     // 注入到 <body> 最前面的 overlay
@@ -176,10 +238,14 @@ function serveIndex(res) {
       <h1>运动伤害现场急救虚拟仿真实验</h1>
       <p class="subtitle">VIRTUAL SIMULATION EXPERIMENT</p>
     </div>
-    <button id="landing-btn" onclick="enterExperiment()">
+    <button id="landing-btn" onclick="enterExperiment()" disabled>
       进入全屏实验
       <span class="arrow">→</span>
     </button>
+    <div id="landing-progress">
+      <div id="landing-progress-fill"></div>
+    </div>
+    <div id="landing-progress-text">加载中 0%</div>
     <p class="hint">点击按钮进入全屏沉浸式实验环境</p>
   </div>`;
 
@@ -188,8 +254,25 @@ function serveIndex(res) {
   <script>
     (function() {
       var overlay = document.getElementById('landing-overlay');
+      var btn = document.getElementById('landing-btn');
+      var fill = document.getElementById('landing-progress-fill');
+      var text = document.getElementById('landing-progress-text');
+      var ready = false;
+
+      window.__landingSetProgress = function(progress) {
+        var percent = Math.max(0, Math.min(100, Math.round((progress || 0) * 100)));
+        if (fill) fill.style.width = percent + '%';
+        if (text) text.textContent = percent >= 100 ? '加载完成' : '加载中 ' + percent + '%';
+      };
+
+      window.__landingSetReady = function() {
+        ready = true;
+        window.__landingSetProgress(1);
+        if (btn) btn.disabled = false;
+      };
 
       window.enterExperiment = function() {
+        if (!ready) return;
         var el = document.documentElement;
         var requestFS = el.requestFullscreen || el.webkitRequestFullscreen
                      || el.msRequestFullscreen || el.mozRequestFullScreen;
@@ -210,6 +293,27 @@ function serveIndex(res) {
     })();
   </script>`;
 
+    html = html.replace(
+      /progressBarFull\.style\.width\s*=\s*100\s*\*\s*progress\s*\+\s*"%";/,
+      'progressBarFull.style.width = 100 * progress + "%"; if (window.__landingSetProgress) window.__landingSetProgress(progress);'
+    );
+    if (!html.includes('config.cacheControl')) {
+      html = html.replace(
+        /showBanner:\s*unityShowBanner,\s*\n\s*};/,
+        'showBanner: unityShowBanner,\n      };\n\n      config.cacheControl = function (url) {\n        if (url === config.dataUrl || url === config.frameworkUrl || url === config.codeUrl) {\n          return "immutable";\n        }\n        return "must-revalidate";\n      };'
+      );
+    }
+    if (!html.includes('config.devicePixelRatio')) {
+      html = html.replace(
+        /};\s*\n\s*\/\/ By default Unity keeps WebGL canvas render target size matched with/,
+        '};\n      config.devicePixelRatio = Math.min(window.devicePixelRatio || 1, 1.5);\n\n      // By default Unity keeps WebGL canvas render target size matched with'
+      );
+    }
+    html = html.replace(
+      /loadingBar\.style\.display\s*=\s*"none";/,
+      'if (window.__landingSetReady) window.__landingSetReady(); loadingBar.style.display = "none";'
+    );
+
     html = html.replace('</head>', css + '\n</head>');
     html = html.replace('<body>', '<body>\n' + overlay);
     html = html.replace('</body>', js + '\n</body>');
diff --git a/ProjectSettings/QualitySettings.asset b/ProjectSettings/QualitySettings.asset
index 6238eb7..ce7f712 100644
--- a/ProjectSettings/QualitySettings.asset
+++ b/ProjectSettings/QualitySettings.asset
@@ -4,7 +4,7 @@
 QualitySettings:
   m_ObjectHideFlags: 0
   serializedVersion: 5
-  m_CurrentQuality: 2
+  m_CurrentQuality: 0
   m_QualitySettings:
   - serializedVersion: 2
     name: Performant
@@ -129,7 +129,7 @@ QualitySettings:
     Server: 0
     Stadia: 2
     Standalone: 2
-    WebGL: 1
+    WebGL: 0
     Windows Store Apps: 2
     XboxOne: 2
     iPhone: 1