修复导览与讲解位置预览逻辑

src/components/explain/ExplainHallSelect.vue

@@ -24,11 +24,6 @@
       </view>
 
       <template v-else>
-        <view class="section-heading">
-          <text class="section-title">请选择展厅</text>
-          <text class="section-count">{{ filteredHalls.length }} 个展厅</text>
-        </view>
-
         <view v-if="filteredHalls.length" class="hall-list">
           <view
             v-for="hall in filteredHalls"
@@ -37,10 +32,10 @@
             @tap="handleHallClick(hall.id)"
           >
             <image
-              v-if="hall.image"
+              v-if="hallIconUrl(hall)"
               class="hall-thumb"
-              :src="hall.image"
-              mode="aspectFill"
+              :src="hallIconUrl(hall)"
+              mode="aspectFit"
             />
             <view v-else class="hall-thumb placeholder">
               <text class="hall-thumb-text">{{ hallIconText(hall.name) }}</text>
@@ -96,8 +91,26 @@ const emit = defineEmits<{
   back: []
 }>()
 
+const HALL_ICON_BASE = '/static/icons/halls'
+
+const hallIconMap: Record<string, string> = {
+  宇宙厅: `${HALL_ICON_BASE}/universe.jpg`,
+  地球厅: `${HALL_ICON_BASE}/earth.jpg`,
+  演化厅: `${HALL_ICON_BASE}/evolution.jpg`,
+  恐龙厅: `${HALL_ICON_BASE}/dinosaur.jpg`,
+  人类厅: `${HALL_ICON_BASE}/human.jpg`,
+  动物厅: `${HALL_ICON_BASE}/animal.jpg`,
+  生物厅: `${HALL_ICON_BASE}/biology.jpg`,
+  生态厅: `${HALL_ICON_BASE}/ecology.jpg`,
+  家园厅: `${HALL_ICON_BASE}/homeland.jpg`
+}
+
 const filteredHalls = computed(() => props.halls)
 
+const hallIconUrl = (hall: ExplainHallSelectItem) => {
+  return hallIconMap[hall.name.trim()] || hall.image || ''
+}
+
 const hallIconText = (name: string) => name.trim().slice(0, 1) || '讲'
 
 const handleHallClick = (hallId: string) => {
@@ -124,8 +137,6 @@ const handleBack = () => {
   box-sizing: border-box;
 }
 
-.section-title,
-.section-count,
 .state-title,
 .state-desc,
 .hall-name,
@@ -180,29 +191,6 @@ const handleBack = () => {
   color: #151713;
 }
 
-.section-heading {
-  margin-top: 0;
-  margin-bottom: 16px;
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 12px;
-}
-
-.section-title {
-  font-size: 19px;
-  line-height: 27px;
-  font-weight: 800;
-  color: #151713;
-}
-
-.section-count {
-  flex-shrink: 0;
-  font-size: 12px;
-  line-height: 18px;
-  color: #7b8275;
-}
-
 .hall-list {
   display: flex;
   flex-direction: column;
@@ -231,7 +219,10 @@ const handleBack = () => {
   width: 68px;
   height: 68px;
   border-radius: 8px;
-  background: #f1f2ee;
+  background: #ffffff;
+  border: 1px solid rgba(36, 49, 42, 0.06);
+  box-sizing: border-box;
+  object-fit: contain;
 }
 
 .hall-thumb.placeholder {