R62: 帮助页修复—①buildOverlay 调 cleanupGuide 致 guide=null 引导从未生效(去冗余清理, startGuide 已清) ②帮助卡固定一行2个(全屏不再3列, 窄屏1列; style?g help-guide?c)

project/短视频脚本创作/V1.0/mcn-work-shop/public/help-guide.js

@@ -379,7 +379,8 @@
   }
 
   function buildOverlay() {
-    cleanupGuide();
+    /* 注意：不要在此调 cleanupGuide()——它会把 guide 置 null，导致下方 guide.mask 赋值抛错。
+       旧引导清理由调用方 startGuide（入口处 if (guide) cleanupGuide()）负责；新建 mask/pop 挂到当前 guide */
     const mask = document.createElement('div');
     mask.className = 'g-mask';
     mask.style.zIndex = String(GUIDE_Z);

project/短视频脚本创作/V1.0/mcn-work-shop/public/index.html

@@ -4,7 +4,7 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>短视频工作台</title>
-<link rel="stylesheet" href="style.css?v=20260904f">
+<link rel="stylesheet" href="style.css?v=20260904g">
 <script src="vendor/echarts.min.js"></script>
 </head>
 <body>
@@ -42,7 +42,7 @@
 </div>
 
 <script src="app.js?v=20260904e"></script>
-<script src="help-guide.js?v=20260904b"></script>
+<script src="help-guide.js?v=20260904c"></script>
 <script src="data-pages.js?v=20260904l"></script>
 </body>
 </html>

project/短视频脚本创作/V1.0/mcn-work-shop/public/style.css

@@ -738,7 +738,8 @@ td.td-title { max-width: 240px; }
 .help-head-icon { width: 52px; height: 52px; border-radius: 14px; background: var(--primary-soft); color: var(--primary); display: flex; align-items: center; justify-content: center; flex: none; }
 .help-head h2 { font-size: 22px; margin-bottom: 4px; }
 .help-head-sub { color: var(--dim); font-size: 15px; }
-.help-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
+.help-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; } /* 09-04 用户定稿：卡片固定一行 2 个（全屏不再 auto-fill 变 3 列）；窄视口降 1 列 */
+@media (max-width: 820px) { .help-grid { grid-template-columns: 1fr; } }
 .help-card {
   background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
   padding: 16px 18px; box-shadow: var(--shadow);