diff --git a/theme/index.hbs b/theme/index.hbs
index 080b785..8046f59 100644
--- a/theme/index.hbs
+++ b/theme/index.hbs
@@ -1,59 +1,95 @@
 <!DOCTYPE HTML>
 <html lang="{{ language }}" class="{{ default_theme }}" dir="{{ text_direction }}">
-    <head>
-        <!-- Book generated using mdBook -->
-        <meta charset="UTF-8">
-        <title>{{ title }}</title>
-        {{#if is_print }}
-        <meta name="robots" content="noindex">
-        {{/if}}
-        {{#if base_url}}
-        <base href="{{ base_url }}">
-        {{/if}}
+
+<head>
+    <!-- Book generated using mdBook -->
+    <meta charset="UTF-8">
+    <title>{{ title }}</title>
+    {{#if is_print }}
+    <meta name="robots" content="noindex">
+    {{/if}}
+    {{#if base_url}}
+    <base href="{{ base_url }}">
+    {{/if}}
 
 
-        <!-- Custom HTML head -->
-        {{> head}}
+    <!-- Custom HTML head -->
+    {{> head}}
 
-        <meta name="description" content="{{ description }}">
-        <meta name="viewport" content="width=device-width, initial-scale=1">
-        <meta name="theme-color" content="#ffffff">
+    <meta name="description" content="{{ description }}">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="theme-color" content="#ffffff">
 
-        {{#if favicon_svg}}
-        <link rel="icon" href="{{ path_to_root }}favicon.svg">
-        {{/if}}
-        {{#if favicon_png}}
-        <link rel="shortcut icon" href="{{ path_to_root }}favicon.png">
-        {{/if}}
-        <link rel="stylesheet" href="{{ path_to_root }}css/variables.css">
-        <link rel="stylesheet" href="{{ path_to_root }}css/general.css">
-        <link rel="stylesheet" href="{{ path_to_root }}css/chrome.css">
-        {{#if print_enable}}
-        <link rel="stylesheet" href="{{ path_to_root }}css/print.css" media="print">
-        {{/if}}
+    {{#if favicon_svg}}
+    <link rel="icon" href="{{ path_to_root }}favicon.svg">
+    {{/if}}
+    {{#if favicon_png}}
+    <link rel="shortcut icon" href="{{ path_to_root }}favicon.png">
+    {{/if}}
+    <link rel="stylesheet" href="{{ path_to_root }}css/variables.css">
+    <link rel="stylesheet" href="{{ path_to_root }}css/general.css">
+    <link rel="stylesheet" href="{{ path_to_root }}css/chrome.css">
+    {{#if print_enable}}
+    <link rel="stylesheet" href="{{ path_to_root }}css/print.css" media="print">
+    {{/if}}
 
-        <!-- Fonts -->
-        <link rel="stylesheet" href="{{ path_to_root }}FontAwesome/css/font-awesome.css">
-        {{#if copy_fonts}}
-        <link rel="stylesheet" href="{{ path_to_root }}fonts/fonts.css">
-        {{/if}}
+    <!-- Fonts -->
+    <link rel="stylesheet" href="{{ path_to_root }}FontAwesome/css/font-awesome.css">
+    {{#if copy_fonts}}
+    <link rel="stylesheet" href="{{ path_to_root }}fonts/fonts.css">
+    {{/if}}
 
-        <!-- Highlight.js Stylesheets -->
-        <link rel="stylesheet" href="{{ path_to_root }}highlight.css">
-        <link rel="stylesheet" href="{{ path_to_root }}tomorrow-night.css">
-        <link rel="stylesheet" href="{{ path_to_root }}ayu-highlight.css">
+    <!-- Highlight.js Stylesheets -->
+    <link rel="stylesheet" href="{{ path_to_root }}highlight.css">
+    <link rel="stylesheet" href="{{ path_to_root }}tomorrow-night.css">
+    <link rel="stylesheet" href="{{ path_to_root }}ayu-highlight.css">
 
-        <!-- Custom theme stylesheets -->
-        {{#each additional_css}}
-        <link rel="stylesheet" href="{{ ../path_to_root }}{{ this }}">
-        {{/each}}
+    <!-- Custom theme stylesheets -->
+    {{#each additional_css}}
+    <link rel="stylesheet" href="{{ ../path_to_root }}{{ this }}">
+    {{/each}}
+
+    {{#if mathjax_support}}
+    <!-- MathJax -->
+    <script async
+        src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+    {{/if}}
+
+    <!-- study env css -->
+    <style>
+        .popup-window {
+            position: fixed;
+            top: 0;
+            right: -100%;
+            /* Start with the window off screen */
+            width: 100%;
+            height: 100%;
+            border: none;
+            background-color: white;
+            box-shadow: -5px 0 5px rgba(0, 0, 0, 0.2);
+            z-index: 1000;
+            overflow-y: auto;
+            /* Enable scrolling if content is taller than the screen */
+            transition: right 0.3s ease-in-out;
+            /* Smooth slide in animation */
+        }
+
+        .popup-window iframe {
+            width: 500px;
+            height: 100vh;
+            /* Use viewport height to fill the height of the window */
+            border: none;
+        }
+
+        .popup-window.show {
+            right: calc(-100% + 500px);
+            /* Slide the window into view */
+        }
+    </style>
+</head>
+
+<body class="sidebar-visible no-js">
 
-        {{#if mathjax_support}}
-        <!-- MathJax -->
-        <script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
-        {{/if}}
-    </head>
-    <body class="sidebar-visible no-js">
     <div id="body-container">
         <!-- Provide site root to javascript -->
         <script>
@@ -80,7 +116,7 @@
         <!-- Set the theme before any content is loaded, prevents flash -->
         <script>
             var theme;
-            try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
+            try { theme = localStorage.getItem('mdbook-theme'); } catch (e) { }
             if (theme === null || theme === undefined) { theme = default_theme; }
             var html = document.querySelector('html');
             html.classList.remove('{{ default_theme }}')
@@ -98,7 +134,7 @@
             var sidebar = null;
             var sidebar_toggle = document.getElementById("sidebar-toggle-anchor");
             if (document.body.clientWidth >= 1080) {
-                try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
+                try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch (e) { }
                 sidebar = sidebar || 'visible';
             } else {
                 sidebar = 'hidden';
@@ -120,7 +156,7 @@
         <!-- Track and set sidebar scroll position -->
         <script>
             var sidebarScrollbox = document.querySelector('#sidebar .sidebar-scrollbox');
-            sidebarScrollbox.addEventListener('click', function(e) {
+            sidebarScrollbox.addEventListener('click', function (e) {
                 if (e.target.tagName === 'A') {
                     sessionStorage.setItem('sidebar-scroll', sidebarScrollbox.scrollTop);
                 }
@@ -140,16 +176,19 @@
         </script>
 
         <div id="page-wrapper" class="page-wrapper">
-
             <div class="page">
                 {{> header}}
                 <div id="menu-bar-hover-placeholder"></div>
                 <div id="menu-bar" class="menu-bar sticky">
                     <div class="left-buttons">
-                        <label id="sidebar-toggle" class="icon-button" for="sidebar-toggle-anchor" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
+                        <label id="sidebar-toggle" class="icon-button" for="sidebar-toggle-anchor"
+                            title="Toggle Table of Contents" aria-label="Toggle Table of Contents"
+                            aria-controls="sidebar">
                             <i class="fa fa-bars"></i>
                         </label>
-                        <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
+                        <button id="theme-toggle" class="icon-button" type="button" title="Change theme"
+                            aria-label="Change theme" aria-haspopup="true" aria-expanded="false"
+                            aria-controls="theme-list">
                             <i class="fa fa-paint-brush"></i>
                         </button>
                         <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
@@ -160,10 +199,14 @@
                             <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
                         </ul>
                         {{#if search_enabled}}
-                        <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
+                        <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)"
+                            aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S"
+                            aria-controls="searchbar">
                             <i class="fa fa-search"></i>
                         </button>
                         {{/if}}
+                        <button id="popup-btn" class="icon-button" type="button" aria-expanded="false"
+                            aria-keyshortcuts="T" class="popup-btn">实验环境</button>
                     </div>
 
                     <h1 class="menu-title">{{ book_title }}</h1>
@@ -191,7 +234,8 @@
                 {{#if search_enabled}}
                 <div id="search-wrapper" class="hidden">
                     <form id="searchbar-outer" class="searchbar-outer">
-                        <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
+                        <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..."
+                            aria-controls="searchresults-outer" aria-describedby="searchresults-header">
                     </form>
                     <div id="searchresults-outer" class="searchresults-outer hidden">
                         <div id="searchresults-header" class="searchresults-header"></div>
@@ -205,7 +249,7 @@
                 <script>
                     document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
                     document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
-                    Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
+                    Array.from(document.querySelectorAll('#sidebar a')).forEach(function (link) {
                         link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
                     });
                 </script>
@@ -215,36 +259,44 @@
                         {{{ content }}}
                     </main>
 
+
                     <nav class="nav-wrapper" aria-label="Page navigation">
                         <!-- Mobile navigation buttons -->
                         {{#previous}}
-                            <a rel="prev" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
-                                <i class="fa fa-angle-left"></i>
-                            </a>
+                        <a rel="prev" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters previous"
+                            title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
+                            <i class="fa fa-angle-left"></i>
+                        </a>
                         {{/previous}}
 
                         {{#next}}
-                            <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
-                                <i class="fa fa-angle-right"></i>
-                            </a>
+                        <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters next"
+                            title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
+                            <i class="fa fa-angle-right"></i>
+                        </a>
                         {{/next}}
 
                         <div style="clear: both"></div>
                     </nav>
                 </div>
+                <div id="popup-window" class="popup-window">
+                    <iframe src="https://jslinux.cxykevin.top" frameborder="0"></iframe>
+                </div>
             </div>
 
             <nav class="nav-wide-wrapper" aria-label="Page navigation">
                 {{#previous}}
-                    <a rel="prev" href="{{ path_to_root }}{{link}}" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
-                        <i class="fa fa-angle-left"></i>
-                    </a>
+                <a rel="prev" href="{{ path_to_root }}{{link}}" class="nav-chapters previous" title="Previous chapter"
+                    aria-label="Previous chapter" aria-keyshortcuts="Left">
+                    <i class="fa fa-angle-left"></i>
+                </a>
                 {{/previous}}
 
                 {{#next}}
-                    <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
-                        <i class="fa fa-angle-right"></i>
-                    </a>
+                <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="nav-chapters next" title="Next chapter"
+                    aria-label="Next chapter" aria-keyshortcuts="Right">
+                    <i class="fa fa-angle-right"></i>
+                </a>
                 {{/next}}
             </nav>
 
@@ -263,7 +315,7 @@
                 }
             };
 
-            window.onbeforeunload = function() {
+            window.onbeforeunload = function () {
                 socket.close();
             }
         </script>
@@ -277,10 +329,12 @@
             // make sure we don't activate google analytics if the developer is
             // inspecting the book locally...
             if (localAddrs.indexOf(document.location.hostname) === -1) {
-                (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-                m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-                })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+                (function (i, s, o, g, r, a, m) {
+                    i['GoogleAnalyticsObject'] = r; i[r] = i[r] || function () {
+                        (i[r].q = i[r].q || []).push(arguments)
+                    }, i[r].l = 1 * new Date(); a = s.createElement(o),
+                        m = s.getElementsByTagName(o)[0]; a.async = 1; a.src = g; m.parentNode.insertBefore(a, m)
+                })(window, document, 'script', 'https://www.google-analytics.com/analytics.js', 'ga');
 
                 ga('create', '{{google_analytics}}', 'auto');
                 ga('send', 'pageview');
@@ -326,21 +380,32 @@
         {{#if is_print}}
         {{#if mathjax_support}}
         <script>
-        window.addEventListener('load', function() {
-            MathJax.Hub.Register.StartupHook('End', function() {
-                window.setTimeout(window.print, 100);
+            window.addEventListener('load', function () {
+                MathJax.Hub.Register.StartupHook('End', function () {
+                    window.setTimeout(window.print, 100);
+                });
             });
-        });
         </script>
         {{else}}
         <script>
-        window.addEventListener('load', function() {
-            window.setTimeout(window.print, 100);
-        });
+            window.addEventListener('load', function () {
+                window.setTimeout(window.print, 100);
+            });
         </script>
         {{/if}}
         {{/if}}
+        <script>
+            document.getElementById('popup-btn').addEventListener('click', function () {
+                var popupWindow = document.getElementById('popup-window');
+                if (popupWindow.classList.contains('show')) {
+                    popupWindow.classList.remove('show');
+                } else {
+                    popupWindow.classList.add('show');
+                }
+            });
+        </script>
 
     </div>
-    </body>
-</html>
+</body>
+
+</html>
\ No newline at end of file
