style: 移动端菜单改为内容自适应浮动面板

style.css

@@ -404,7 +404,7 @@ body {
     display: none;
     position: fixed;
     inset: 0;
-    background: rgba(0,0,0,0.35);
+    background: transparent;
     z-index: 100;
   }
   #mobile-menu-overlay.show { display: block; }
@@ -412,7 +412,9 @@ body {
     position: absolute;
     left: 0.5rem;
     top: 56px;
-    width: min(280px, 84vw);
+    width: max-content;
+    min-width: 190px;
+    max-width: 84vw;
     max-height: calc(100vh - 72px);
     background: var(--panel-bg);
     border: 1px solid var(--border);
@@ -439,6 +441,7 @@ body {
     font-size: 0.95rem;
     text-decoration: none;
     cursor: pointer;
+    white-space: nowrap;
   }
 
   #app { display: block; padding: 0; }