调整讲解入口为悬浮按钮

src/pages/index/index.vue

@@ -127,6 +127,14 @@
           </view>
           <text class="guide-quick-action-text">来馆</text>
         </view>
+        <view class="guide-quick-action explain" @tap="handleExplainQuickTap">
+          <view class="guide-quick-icon explain">
+            <view class="guide-quick-explain-wave top"></view>
+            <view class="guide-quick-explain-wave middle"></view>
+            <view class="guide-quick-explain-wave bottom"></view>
+          </view>
+          <text class="guide-quick-action-text">讲解</text>
+        </view>
       </view>
 
       <RoutePlannerPanel
@@ -1210,6 +1218,10 @@ const handleMoreOutdoorNav = () => {
   openOutdoorNavPanel()
 }
 
+const handleExplainQuickTap = () => {
+  handleTabChange('explain')
+}
+
 const handleOutdoorNavClose = () => {
   closeOutdoorNavPanel()
 }
@@ -1801,6 +1813,11 @@ const handleExplainBack = () => {
   border-color: #151713;
 }
 
+.guide-quick-action.explain {
+  background: rgba(245, 245, 237, 0.96);
+  border-color: #dfe4d8;
+}
+
 .guide-quick-action:active {
   transform: translateY(1px);
 }
@@ -1817,6 +1834,10 @@ const handleExplainBack = () => {
   color: var(--museum-accent);
 }
 
+.guide-quick-action.explain .guide-quick-icon {
+  color: #151713;
+}
+
 .guide-quick-icon-floor {
   position: absolute;
   left: 3px;
@@ -1859,6 +1880,32 @@ const handleExplainBack = () => {
   border-radius: 50%;
 }
 
+.guide-quick-explain-wave {
+  position: absolute;
+  left: 2px;
+  right: 2px;
+  height: 4px;
+  border: 1.8px solid currentColor;
+  border-left: 0;
+  border-right: 0;
+  border-bottom: 0;
+  border-radius: 999px 999px 0 0;
+}
+
+.guide-quick-explain-wave.top {
+  top: 3px;
+}
+
+.guide-quick-explain-wave.middle {
+  top: 9px;
+  left: 5px;
+}
+
+.guide-quick-explain-wave.bottom {
+  top: 15px;
+  right: 6px;
+}
+
 .guide-quick-action-text {
   width: 100%;
   font-size: 12px;