diff --git a/.vitepress/config.mts b/.vitepress/config.mts
index 337de2f..75e57bc 100644
--- a/.vitepress/config.mts
+++ b/.vitepress/config.mts
@@ -41,9 +41,22 @@ export default defineConfig({
     ['meta', { name: 'mobile-web-app-capable', content: 'yes' }],
     ['meta', { name: 'apple-mobile-web-app-capable', content: 'yes' }],
     ['meta', { name: 'apple-mobile-web-app-status-bar-style', content: 'black-translucent' }],
+    [
+      'meta',
+      {
+        name: 'viewport',
+        content: 'width=device-width, initial-scale=1.0, viewport-fit=cover',
+      },
+    ],
   ],
   themeConfig: {
     logo: { src: '/favicon.ico', width: 24, height: 24 },
+    sidebarMenuLabel: '目录',
+    returnToTopLabel: '回到顶部',
+    docFooter: {
+      prev: '上一篇',
+      next: '下一篇',
+    },
     nav: [
       { text: '首页', link: '/' },
       { text: '五行', link: '/金、木、水、火、土 - 五行/' },
@@ -52,7 +65,7 @@ export default defineConfig({
       { text: '中医', link: '/中医宝典/' },
     ],
     sidebar: generateSidebar(),
-    outline: { level: [2, 4] },
+    outline: { level: [2, 3], label: '本页目录' },
     search: {
       provider: 'local',
     },
diff --git a/.vitepress/sidebar.mts b/.vitepress/sidebar.mts
index 051fabd..3c8715c 100644
--- a/.vitepress/sidebar.mts
+++ b/.vitepress/sidebar.mts
@@ -85,7 +85,7 @@ export function generateSidebar(): Record<string, SidebarItem[]> {
   if (rootFiles.length > 0) {
     groups.push({
       text: '典籍',
-      collapsed: false,
+      collapsed: true,
       items: rootFiles.map((file) => ({
         text: titleFromFilename(file.name),
         link: toLink(file.name),
@@ -103,7 +103,7 @@ export function generateSidebar(): Record<string, SidebarItem[]> {
     if (items.length === 0) continue
     groups.push({
       text: dir.name,
-      collapsed: false,
+      collapsed: true,
       items,
     })
   }
diff --git a/.vitepress/theme/InstallApp.vue b/.vitepress/theme/InstallApp.vue
index ca0fc4c..07d48bf 100644
--- a/.vitepress/theme/InstallApp.vue
+++ b/.vitepress/theme/InstallApp.vue
@@ -1,9 +1,12 @@
 <script setup lang="ts">
 import { computed, onMounted, ref } from 'vue'
+import { useRoute } from 'vitepress'
 
+const route = useRoute()
 const showAndroidInstall = ref(false)
 const showIOSHint = ref(false)
 const dismissed = ref(false)
+const isMobile = ref(false)
 let deferredPrompt: BeforeInstallPromptEvent | null = null
 
 interface BeforeInstallPromptEvent extends Event {
@@ -11,11 +14,22 @@ interface BeforeInstallPromptEvent extends Event {
   userChoice: Promise<{ outcome: 'accepted' | 'dismissed' }>
 }
 
-const visible = computed(
-  () => !dismissed.value && (showAndroidInstall.value || showIOSHint.value),
-)
+const isDocPage = computed(() => route.path !== '/')
+
+const visible = computed(() => {
+  if (dismissed.value) return false
+  if (isMobile.value && isDocPage.value) return false
+  return showAndroidInstall.value || showIOSHint.value
+})
 
 onMounted(() => {
+  isMobile.value = window.matchMedia('(max-width: 768px)').matches
+
+  if (sessionStorage.getItem('install-app-dismissed') === '1') {
+    dismissed.value = true
+    return
+  }
+
   const isStandalone =
     window.matchMedia('(display-mode: standalone)').matches ||
     (window.navigator as Navigator & { standalone?: boolean }).standalone
@@ -45,6 +59,7 @@ async function installApp() {
 
 function dismiss() {
   dismissed.value = true
+  sessionStorage.setItem('install-app-dismissed', '1')
 }
 </script>
 
@@ -55,7 +70,7 @@ function dismiss() {
         可将「道德经」安装到桌面，像 App 一样使用。
       </p>
       <p v-else class="install-app__text">
-        iPhone：点击 Safari 底部分享按钮，选择「添加到主屏幕」。
+        iPhone：Safari 底部分享 →「添加到主屏幕」，阅读更方便。
       </p>
       <div class="install-app__actions">
         <button
@@ -76,8 +91,8 @@ function dismiss() {
 .install-app {
   position: fixed;
   right: 16px;
-  bottom: 16px;
-  z-index: 100;
+  bottom: calc(16px + env(safe-area-inset-bottom, 0));
+  z-index: 50;
   max-width: min(92vw, 360px);
 }
 
@@ -104,8 +119,8 @@ function dismiss() {
 .install-app__primary,
 .install-app__ghost {
   border-radius: 8px;
-  padding: 8px 12px;
-  font-size: 13px;
+  padding: 10px 14px;
+  font-size: 14px;
   cursor: pointer;
 }
 
@@ -120,4 +135,12 @@ function dismiss() {
   background: transparent;
   color: var(--vp-c-text-2);
 }
+
+@media (max-width: 768px) {
+  .install-app {
+    left: 12px;
+    right: 12px;
+    max-width: none;
+  }
+}
 </style>
diff --git a/.vitepress/theme/custom.css b/.vitepress/theme/custom.css
new file mode 100644
index 0000000..33b4712
--- /dev/null
+++ b/.vitepress/theme/custom.css
@@ -0,0 +1,160 @@
+:root {
+  --vp-font-family-base: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei',
+    'Noto Sans SC', 'Source Han Sans SC', sans-serif;
+}
+
+/* 旧版 markdown 里的 <font size="4"> 在手机上过大 */
+.vp-doc font {
+  font-size: inherit !important;
+}
+
+.vp-doc {
+  line-height: 1.85;
+  letter-spacing: 0.02em;
+  word-break: break-word;
+}
+
+.vp-doc h1 {
+  font-size: clamp(1.45rem, 5vw, 2rem);
+  line-height: 1.35;
+}
+
+.vp-doc h2 {
+  font-size: clamp(1.2rem, 4.2vw, 1.55rem);
+  margin-top: 1.6em;
+  padding-bottom: 0.35em;
+  border-bottom: 1px solid var(--vp-c-divider);
+}
+
+.vp-doc h3 {
+  font-size: clamp(1.05rem, 3.6vw, 1.25rem);
+}
+
+.vp-doc p {
+  margin: 1em 0;
+}
+
+/* 道德经等用缩进写的“伪代码块”，改成正文排版 */
+.vp-doc pre {
+  white-space: pre-wrap;
+  word-break: break-word;
+  overflow-x: auto;
+  font-family: var(--vp-font-family-base);
+  font-size: 1rem;
+  line-height: 1.9;
+  padding: 14px 16px;
+  border-radius: 10px;
+  border: 1px solid var(--vp-c-divider);
+  background: var(--vp-c-bg-soft);
+}
+
+.vp-doc :not(pre) > code {
+  font-size: 0.92em;
+  word-break: break-word;
+}
+
+.vp-doc img {
+  display: block;
+  max-width: 100% !important;
+  height: auto !important;
+  margin: 1em auto;
+  border-radius: 8px;
+}
+
+.vp-doc table {
+  display: block;
+  overflow-x: auto;
+  -webkit-overflow-scrolling: touch;
+  font-size: 0.92rem;
+}
+
+.vp-doc blockquote {
+  margin: 1.2em 0;
+  padding: 0.8em 1em;
+  border-radius: 8px;
+}
+
+/* 底部上一篇 / 下一篇：加大触控区域 */
+.VPDocFooter .pager-link {
+  min-height: 48px;
+  padding: 12px 14px;
+  border-radius: 10px;
+}
+
+.VPDocFooter .pager-link .title {
+  font-size: 0.95rem;
+  line-height: 1.45;
+}
+
+@media (max-width: 960px) {
+  .VPContent {
+    padding-top: 0;
+  }
+
+  .VPDoc .container {
+    padding: 0 14px;
+  }
+
+  .VPDoc .content {
+    max-width: 100%;
+  }
+
+  .vp-doc {
+    padding: 12px 0 88px;
+    font-size: 17px;
+  }
+
+  .vp-doc h1 {
+    margin-bottom: 0.6em;
+  }
+
+  /* 手机隐藏右侧大纲，避免挤压正文 */
+  .VPDoc .aside {
+    display: none;
+  }
+
+  .VPDoc.has-aside .content-container {
+    max-width: 100%;
+  }
+
+  /* 侧边栏目录项加大点击区域 */
+  .VPSidebarItem .text {
+    line-height: 1.5;
+    padding-top: 4px;
+    padding-bottom: 4px;
+  }
+
+  .VPSidebarItem.level-0 > .item > .text {
+    font-size: 15px;
+  }
+
+  /* 顶栏留白，适配刘海屏 */
+  .VPNavBar {
+    padding-top: env(safe-area-inset-top, 0);
+  }
+
+  /* 搜索框不占太多宽度 */
+  .VPNavBarSearch {
+    flex-shrink: 1;
+  }
+}
+
+@media (max-width: 640px) {
+  .VPNavBarTitle .title {
+    font-size: 15px;
+  }
+
+  .vp-doc {
+    font-size: 18px;
+    line-height: 1.9;
+  }
+
+  .vp-doc pre {
+    font-size: 17px;
+    padding: 12px 14px;
+  }
+
+  .VPDocFooter {
+    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0));
+  }
+}
diff --git a/.vitepress/theme/index.ts b/.vitepress/theme/index.ts
index 89fbdfd..0c99811 100644
--- a/.vitepress/theme/index.ts
+++ b/.vitepress/theme/index.ts
@@ -1,6 +1,7 @@
 import DefaultTheme from 'vitepress/theme'
 import { h } from 'vue'
 import InstallApp from './InstallApp.vue'
+import './custom.css'
 
 if (typeof window !== 'undefined') {
   import('virtual:pwa-register').then(({ registerSW }) => {