diff --git a/.vitepress/theme/components/ImageViewer.vue b/.vitepress/theme/components/ImageViewer.vue
index fd8289a..7f947da 100644
--- a/.vitepress/theme/components/ImageViewer.vue
+++ b/.vitepress/theme/components/ImageViewer.vue
@@ -86,7 +86,7 @@ const show = () => {
     // 延迟一帧触发动画，确保 CSS 过渡生效
     isAnimating.value = true;
     // 将焦点转移到查看器内部的关闭按钮
-    const closeBtn = document.querySelector<HTMLElement>(".btn-close");
+    const closeBtn = document.querySelector<HTMLElement>(".ImageViewer .close");
     closeBtn?.focus();
   });
 };
@@ -113,8 +113,32 @@ const hide = () => {
 const prevImage = () => hasPrevious.value && activeIndex.value--;
 const nextImage = () => hasNext.value && activeIndex.value++;
 
-/** 键盘交互处理 */
-useEventListener("keydown", (e: KeyboardEvent) => {
+/** 导航 ButtonGroup 按钮配置 */
+const BUTTONS_NAV_CONFIG = computed(() => [
+  { id: "prev", icon: "chevron_left", ariaLabel: "上一张", type: "normal" },
+  {
+    id: "index",
+    label: `${activeIndex.value + 1} / ${props.images.length}`,
+    color: "tonal",
+    ariaLabel: "当前页码",
+  },
+  { id: "next", icon: "chevron_right", ariaLabel: "下一张", type: "normal" },
+]);
+
+/** 处理按钮组点击事件 */
+const handleButtonGroupClick = (e: Event, item: any) => {
+  switch (item.id) {
+    case "prev":
+      prevImage();
+      break;
+    case "next":
+      nextImage();
+      break;
+  }
+};
+
+/** 处理键盘快捷键 */
+const handleKeyboardShortcuts = (e: KeyboardEvent) => {
   if (!isVisible.value) return;
 
   // 陷阱焦点逻辑
@@ -146,7 +170,10 @@ useEventListener("keydown", (e: KeyboardEvent) => {
       imageScale.value = Math.max(ZOOM_CONFIG.MIN, imageScale.value - ZOOM_CONFIG.STEP);
       break;
   }
-});
+};
+
+/** 键盘交互处理 */
+useEventListener("keydown", handleKeyboardShortcuts);
 
 /** 滚轮缩放与翻页 */
 const handleWheel = (e: WheelEvent) => {
@@ -202,7 +229,7 @@ const handleTouchMove = (e: TouchEvent) => {
     const dist = Math.sqrt(dx * dx + dy * dy);
     imageScale.value = Math.min(
       Math.max((dist / initialTouchDist) * initialTouchScale, ZOOM_CONFIG.MIN),
-      ZOOM_CONFIG.MAX_TOUCH
+      ZOOM_CONFIG.MAX_TOUCH,
     );
   } else if (e.touches.length === 1) {
     const touch = e.touches[0];
@@ -234,23 +261,15 @@ defineExpose({ show, hide });
     aria-modal="true"
     tabindex="-1"
   >
-    <MaterialButton @click="hide" class="btn-close" icon="close" color="text" size="m" aria-label="关闭" />
-    <MaterialButton
-      v-if="hasPrevious"
-      @click="prevImage"
-      class="btn-nav prev"
-      icon="chevron_left"
-      size="l"
-      aria-label="上一张"
-    />
-    <MaterialButton
-      v-if="hasNext"
-      @click="nextImage"
-      class="btn-nav next"
-      icon="chevron_right"
-      size="l"
-      aria-label="下一张"
+    <ButtonGroup
+      :links="BUTTONS_NAV_CONFIG"
+      layout="horizontal"
+      size="m"
+      class="nav-group"
+      @click="handleButtonGroupClick"
     />
+    <MaterialButton color="tonal" icon="close" aria-label="关闭" class="close" @click="hide"></MaterialButton>
+
     <div
       class="content"
       @click.self="hide"
@@ -280,18 +299,6 @@ defineExpose({ show, hide });
         }"
       />
     </div>
-    <p class="index-text">{{ activeIndex + 1 }} / {{ images.length }}</p>
-    <div class="thumbnails" v-if="images.length > 1">
-      <button
-        v-for="(img, idx) in images"
-        :key="idx"
-        class="thumbnail"
-        :class="{ active: idx === activeIndex }"
-        @click="activeIndex = idx"
-      >
-        <img :src="img" alt="thumbnail" />
-      </button>
-    </div>
   </div>
 </template>
 
diff --git a/.vitepress/theme/styles/components/ImageViewer.scss b/.vitepress/theme/styles/components/ImageViewer.scss
index 39fe3a1..9775ace 100644
--- a/.vitepress/theme/styles/components/ImageViewer.scss
+++ b/.vitepress/theme/styles/components/ImageViewer.scss
@@ -22,47 +22,26 @@
   -moz-user-select: none;
   z-index: 9999;
 
-  .index-text {
-    padding-block: 3px;
-    padding-inline: 9px;
+  .nav-group {
+    position: absolute;
+    bottom: 0px;
 
-    color: var(--md-sys-color-surface-variant);
-
-    border-radius: var(--md-sys-shape-corner-medium);
-
-    background-color: var(--md-sys-color-on-surface-variant);
+    margin-block-end: 12px;
 
     z-index: 3;
   }
 
-  .btn-close,
-  .btn-nav {
-    display: flex;
-    align-items: center;
-    justify-content: center;
+  .close {
+    position: absolute;
+    right: 0px;
+    top: 0px;
 
-    position: absolute !important;
+    margin-inline-end: 12px;
+    margin-block-start: 12px;
 
     z-index: 3;
   }
 
-  .btn-close {
-    right: 20px;
-    top: 20px;
-  }
-
-  .btn-nav {
-    top: 50%;
-
-    &.prev {
-      left: 20px;
-    }
-
-    &.next {
-      right: 20px;
-    }
-  }
-
   .content {
     display: flex;
     align-items: center;
@@ -74,70 +53,21 @@
     padding-block-start: 5vh;
 
     z-index: 2;
-  }
 
-  .content-image {
-    border-radius: var(--md-sys-shape-corner-full);
+    .content-image {
+      background-color: var(--md-sys-color-surface-variant);
 
-    background-color: var(--md-sys-color-surface-variant);
+      clip-path: circle(10%);
+      object-fit: contain;
+      transition: var(--md-sys-motion-spring-slow-spatial-duration) var(--md-sys-motion-spring-slow-spatial);
 
-    clip-path: circle(10%);
-    object-fit: contain;
-    transition: var(--md-sys-motion-spring-slow-spatial-duration) var(--md-sys-motion-spring-slow-spatial);
+      &.transitioning {
+        opacity: 0.6;
+      }
 
-    &.transitioning {
-      opacity: 0.6;
-    }
-
-    &.notransition {
-      transition: none !important;
-    }
-  }
-
-  .thumbnails {
-    display: flex;
-    gap: 8px;
-
-    max-width: calc(100% - 66px);
-
-    padding: 24px;
-
-    overflow-x: auto;
-    overflow-y: hidden;
-    z-index: 3;
-  }
-
-  .thumbnail {
-    flex-shrink: 0;
-
-    width: 66px;
-    height: 66px;
-
-    padding: 0px;
-
-    border: 0px;
-    border-radius: var(--md-sys-shape-corner-large);
-
-    cursor: pointer;
-    overflow: hidden;
-    transition: transform var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
-
-    &.active {
-      @include mixin.focus-ring($thickness: 1, $offset: 2);
-
-      outline-color: var(--md-sys-color-on-surface-variant) !important;
-      transition: transform var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
-    }
-
-    &:hover {
-      transform: scale(0.9);
-    }
-
-    img {
-      height: 100%;
-      width: 100%;
-
-      object-fit: cover;
+      &.notransition {
+        transition: none !important;
+      }
     }
   }
 
@@ -146,8 +76,6 @@
     opacity: 1;
 
     .content-image {
-      border-radius: var(--md-sys-shape-corner-large);
-
       clip-path: circle(100%);
     }
   }