diff --git a/src/components/message/MessageBubble.vue b/src/components/message/MessageBubble.vue
index 7101782..18db9b3 100644
--- a/src/components/message/MessageBubble.vue
+++ b/src/components/message/MessageBubble.vue
@@ -757,7 +757,7 @@ display: flex;
   align-items: center;
   gap: 12px;
   padding: 12px 16px;
-  background: rgba(0, 0, 0, 0.03);
+  background: rgba(0, 0, 0, 0.05);
   border-radius: 10px;
 
   .dark & {
diff --git a/src/components/ui/StackedCards.vue b/src/components/ui/StackedCards.vue
index ad67ce8..176413a 100644
--- a/src/components/ui/StackedCards.vue
+++ b/src/components/ui/StackedCards.vue
@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
-import { NModal, NImage, NTooltip } from 'naive-ui'
+import { NImage, NTooltip } from 'naive-ui'
 import PlusIcon from '../icons/custom/PlusIcon.vue'
 export interface CardItem {
   id: string | number
@@ -42,16 +42,7 @@ const isExpanded = ref(false)
 const isWrapperHovered = ref(false)
 const hoveredCardId = ref<string | number | null>(null)
 const containerRef = ref<HTMLElement | null>(null)
-const previewCard = ref<CardItem | null>(null)
 const canUpload = computed(() => props.supportsFiles || props.supportsVision)
-const isPreviewVisible = computed({
-  get: () => !!previewCard.value,
-  set: (value: boolean) => {
-    if (!value) {
-      closePreview()
-    }
-  },
-})
 const CARD_SCALE = 0.5
 
 // 默认颜色调色板 - 霓虹色系
@@ -138,21 +129,6 @@ function getCardImageUrl(card: CardItem) {
   return card.thumbnail || ''
 }
 
-function openPreview(card: CardItem) {
-  if (card.type !== 'image') return
-  const imageUrl = getCardImageUrl(card)
-  if (!imageUrl) return
-  previewCard.value = card
-}
-
-function closePreview() {
-  previewCard.value = null
-}
-
-function removePreviewCard() {
-  closePreview()
-}
-
 function removeCard(card: CardItem) {
   emit('remove', card.id)
 }
@@ -170,10 +146,6 @@ function handleCardClick(card: CardItem) {
     expandCards()
     return
   }
-
-  if (card.type === 'image') {
-    openPreview(card)
-  }
 }
 
 const cardStyle = computed(() => (index: number, total: number) => {
@@ -214,9 +186,21 @@ const cardStyle = computed(() => (index: number, total: number) => {
 
 const handleDocumentClick = (event: MouseEvent) => {
   if (!containerRef.value) return
+  const target = event.target as HTMLElement | null
+
+  // Naive UI 图片预览层挂载在 body 下，点击其工具栏不应触发卡片收起
+  if (
+    target?.closest(
+      '.n-image-preview-container, .n-image-preview-toolbar, .n-image-preview-overlay, .n-image-preview-close',
+    )
+  ) {
+    return
+  }
+
+  if (!target) return
 
   // 点击卡片组外部时收起
-  if (!containerRef.value.contains(event.target as Node)) {
+  if (!containerRef.value.contains(target)) {
     if (isExpanded.value) {
       isExpanded.value = false
       hoveredCardId.value = null
@@ -273,7 +257,13 @@ watch(
               @mouseenter="hoveredCardId = card.id" @mouseleave="hoveredCardId = null" @click="handleCardClick(card)">
               <div class="card-glow" :style="{ background: getCardColor(card, index) }" />
               <div v-if="card.type === 'image' && getCardImageUrl(card)" class="card-media">
-                <img :src="getCardImageUrl(card)" :alt="getCardTitle(card, index)" />
+                <NImage
+                  :src="getCardImageUrl(card)"
+                  :alt="getCardTitle(card, index)"
+                  object-fit="cover"
+                  :preview-disabled="!isExpanded || card.uploading || card.deleting"
+                  :img-props="{ loading: 'lazy' }"
+                />
                 <div v-if="card.uploading" class="card-media-uploading">
                   <div class="card-media-uploading-spinner" aria-hidden="true" />
                   <span class="card-media-uploading-text">上传中</span>
@@ -285,7 +275,13 @@ watch(
               </div>
               <div v-else-if="card.type === 'image'" class="card-preview">
                 <div v-if="getCardImageUrl(card)" class="card-preview-image">
-                  <img :src="getCardImageUrl(card)" :alt="getCardTitle(card, index)" />
+                  <NImage
+                    :src="getCardImageUrl(card)"
+                    :alt="getCardTitle(card, index)"
+                    object-fit="cover"
+                    :preview-disabled="!isExpanded || card.uploading || card.deleting"
+                    :img-props="{ loading: 'lazy' }"
+                  />
                 </div>
                 <div class="card-preview-fallback">
                   <span class="card-icon">
@@ -341,23 +337,6 @@ watch(
       <PlusIcon :size="12" />
     </button>
 
-    <NModal v-model:show="isPreviewVisible" preset="card" :mask-closable="true" :close-on-esc="true"
-      :on-close="removePreviewCard" class="image-preview-modal"
-      :content-style="{ width: '100%', height: '100%', padding: '0', overflow: 'hidden' }"
-      :style="{ width: '100vw', height: '100vh', maxWidth: '100vw', margin: '0', padding: '0', borderRadius: '0', background: 'rgba(5, 7, 12, 0.96)' }">
-      <div class="image-preview-shell">
-        <NImage v-if="previewCard" :src="getCardImageUrl(previewCard)" :alt="getCardTitle(previewCard, 0)"
-          object-fit="contain" preview-disabled :img-props="{
-            style: {
-              width: '100%',
-              height: '100%',
-              maxWidth: '100%',
-              maxHeight: '100%',
-            },
-          }" class="image-preview-content" />
-      </div>
-    </NModal>
-
   </div>
 </template>
 
@@ -420,11 +399,11 @@ watch(
   position: absolute;
   width: 74%;
   height: 100%;
-  border-radius: 5px;
+  border-radius: 10px;
   border: 1px solid var(--card-border-color, var(--ffffff, #FFF));
   background: url(<path-to-image>) lightgray 50% / cover no-repeat;
   cursor: pointer;
-  overflow: hidden;
+  /* overflow: hidden; */
   transition: transform 0.35s ease-out, opacity 0.35s ease-out;
   will-change: transform, opacity;
 }
@@ -439,6 +418,8 @@ watch(
 
 .card-media {
   cursor: default;
+  border-radius: 10px;
+  overflow: hidden;
 }
 
 .card-media-uploading {
@@ -529,8 +510,8 @@ watch(
 
 .card-delete-btn {
   position: absolute;
-  top: 0.3rem;
-  right: 0.3rem;
+  top: -0.3rem;
+  right: -0.3rem;
   z-index: 4;
   display: inline-flex;
   align-items: center;
@@ -556,8 +537,14 @@ watch(
   display: block;
 }
 
-.card-media img,
-.card-preview-image img {
+.card-media :deep(.n-image),
+.card-preview-image :deep(.n-image) {
+  width: 100%;
+  height: 100%;
+}
+
+.card-media :deep(.n-image img),
+.card-preview-image :deep(.n-image img) {
   width: 100%;
   height: 100%;
   object-fit: cover;
@@ -816,61 +803,6 @@ watch(
   transform: translateX(-50%) translateY(6px);
 }
 
-.image-preview-modal :deep(.n-card) {
-  background: transparent;
-  width: 100vw;
-  height: 100vh;
-  margin: 0;
-  overflow: hidden;
-  display: flex;
-  flex-direction: column;
-}
-
-.image-preview-modal :deep(.n-card__content) {
-  flex: 1;
-  min-width: 0;
-  min-height: 0;
-  width: 100%;
-  height: 100%;
-  padding: 0;
-  overflow: hidden;
-  display: flex;
-}
-
-.image-preview-shell {
-  position: relative;
-  width: 100%;
-  height: 100%;
-  min-width: 0;
-  min-height: 0;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  overflow: hidden;
-}
-
-.image-preview-content {
-  flex: 1;
-  width: 100%;
-  height: 100%;
-  max-width: calc(100vw - 48px);
-  max-height: calc(100vh - 48px);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  overflow: hidden;
-  z-index: 1;
-}
-
-.image-preview-content :deep(img) {
-  width: 100%;
-  height: 100%;
-  max-width: 100%;
-  max-height: 100%;
-  object-fit: contain;
-  display: block;
-}
-
 /* 响应式 */
 @media (max-width: 640px) {
   .stacked-cards-container {