diff --git a/src/views/index/Maps.vue b/src/views/index/Maps.vue
index aaa47de..9ea328a 100644
--- a/src/views/index/Maps.vue
+++ b/src/views/index/Maps.vue
@@ -174,7 +174,7 @@
         <button class="jump-btn" @click="handleJumpPage">跳转</button>
       </div>
     </div>
-    <button v-if="showBackTop" class="back-to-top-btn" @click="scrollToTop">
+    <button v-if="showBackTop && isMobile" class="back-to-top-btn" @click="scrollToTop">
       <svg width="24" height="24" viewBox="0 0 24 24" fill="none"><path d="M12 19V5" stroke="#2563eb" stroke-width="2" stroke-linecap="round"/><path d="M6 11L12 5L18 11" stroke="#2563eb" stroke-width="2" stroke-linecap="round"/></svg>
     </button>
   </div>
@@ -195,6 +195,7 @@ const hasNextPage = ref(false)
 const jumpPage = ref('')
 const viewMode = ref('table')
 const showBackTop = ref(false)
+const isMobile = ref(window.innerWidth <= 700)
 
 // 排序和筛选相关
 const orderOptions = [
@@ -334,6 +335,9 @@ onMounted(() => {
     tagOptions.value = tags
   })
   window.addEventListener('scroll', handleScroll)
+  window.addEventListener('resize', () => {
+    isMobile.value = window.innerWidth <= 700
+  })
 })
 onUnmounted(() => {
   window.removeEventListener('scroll', handleScroll)
@@ -717,6 +721,7 @@ onUnmounted(() => {
     vertical-align: middle;
   }
   .back-to-top-btn {
+    display: flex;
     position: fixed;
     right: 18px;
     bottom: 18px;
@@ -727,7 +732,6 @@ onUnmounted(() => {
     background: #fff;
     box-shadow: 0 2px 8px rgba(37,99,235,0.12);
     border: none;
-    display: flex;
     align-items: center;
     justify-content: center;
     cursor: pointer;