diff --git a/App.vue b/App.vue
index 1f95316..a58039e 100644
--- a/App.vue
+++ b/App.vue
@@ -3,6 +3,9 @@ export default {
   onLaunch() {
     console.log('App Launch')
 
+    // 🔥 初始化字体缩放（使用 Vuex）
+    this.$store.dispatch('font/initFontScale')
+
     // 从本地存储恢复登录状态
     const token = uni.getStorageSync('token')
     const userInfo = uni.getStorageSync('userInfo')
@@ -25,7 +28,6 @@ export default {
       // 初始化扫码模式配置
       this.$store.dispatch('scan/initScanMode')
     }
-
   }
 }
 </script>
@@ -37,5 +39,11 @@ export default {
 
 page {
   height: 100%;
+  
+  /* 
+   * 使用 rem 方案后，不需要设置 font-size
+   * 所有元素使用 rem 单位，会自动相对于根字体大小计算
+   * 根字体大小由 JavaScript 动态设置（document.documentElement.style.fontSize）
+   */
 }
 </style>
diff --git a/components/common/inout-history.vue b/components/common/inout-history.vue
index b75c9fe..27752bd 100644
--- a/components/common/inout-history.vue
+++ b/components/common/inout-history.vue
@@ -53,7 +53,7 @@ export default {
 }
 
 .section-title {
-  font-size: 14px;
+  font-size: $font-size-md;
   font-weight: 500;
   color: #333;
 }
@@ -64,7 +64,7 @@ export default {
 }
 
 .empty-text {
-  font-size: 13px;
+  font-size: $font-size-base;
   color: #999;
 }
 
@@ -77,12 +77,12 @@ export default {
   border-radius: 8px;
   margin-bottom: 10px;
   box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
-  font-size: 13px;
+  font-size: $font-size-base;
   padding: 12px;
 }
 
 .record-text {
-  font-size: 13px;
+  font-size: $font-size-base;
   color: #333;
   flex: 1;
   overflow: hidden;
diff --git a/components/common/scan-records.vue b/components/common/scan-records.vue
index c03e100..53a2e9a 100644
--- a/components/common/scan-records.vue
+++ b/components/common/scan-records.vue
@@ -54,13 +54,13 @@ export default {
 }
 
 .section-title {
-  font-size: 14px;
+  font-size: $font-size-md;
   font-weight: 500;
   color: #333;
 }
 
 .clear-btn {
-  font-size: 13px;
+  font-size: $font-size-base;
   color: #666;
   padding: 4px 12px;
 }
@@ -71,7 +71,7 @@ export default {
 }
 
 .empty-text {
-  font-size: 13px;
+  font-size: $font-size-base;
   color: #999;
 }
 
@@ -80,7 +80,7 @@ export default {
   border-radius: 8px;
   // margin: 0 16px 10px;
   box-shadow: 0 1px 3px rgba(0,0,0,0.08);
-  font-size: 13px;
+  font-size: $font-size-base;
   padding: 12px;
 }
 
@@ -117,7 +117,7 @@ export default {
 }
 
 .record-time {
-  font-size: 12px;
+  font-size: $font-size-xs;
   color: #999;
   min-width: 70px;
   text-align: right;
diff --git a/main.js b/main.js
index 94919bf..81f4343 100644
--- a/main.js
+++ b/main.js
@@ -42,6 +42,20 @@ Vue.prototype.$hideLoading = function() {
   uni.hideLoading()
 }
 
+// 全局字体工具
+Vue.prototype.$fontSize = require('./utils/fontSize').default
+
+// 🔥 全局混入：每个页面显示时自动应用字体设置
+Vue.mixin({
+  onShow() {
+    // 从 Vuex 读取字体设置并应用到 DOM
+    const scale = this.$store.state.font.fontScale
+    if (scale && scale !== 1.0) {
+      this.$store.dispatch('font/applyFontScale', scale)
+    }
+  }
+})
+
 App.mpType = 'app'
 
 const app = new Vue({
diff --git a/pages.json b/pages.json
index 8434ac8..38dd84c 100644
--- a/pages.json
+++ b/pages.json
@@ -109,6 +109,12 @@
 				"navigationBarTitleText": "环境配置"
 			}
 		},
+		{
+			"path": "pages/settings/other-settings",
+			"style": {
+				"navigationBarTitleText": "其他设置"
+			}
+		},
 		{
 			"path": "pages/settings/devices/printer",
 			"style": {
@@ -194,6 +200,12 @@
 				"navigationBarTitleText": "自动打印"
 			}
 		},
+		{
+			"path": "pages/testpages/font-test",
+			"style": {
+				"navigationBarTitleText": "字体缩放测试"
+			}
+		},
 		/* #endif */
 		{
 			"path": "pages/weigh/generate",
diff --git a/pages/home/home.vue b/pages/home/home.vue
index a4b55ee..52c6a6f 100644
--- a/pages/home/home.vue
+++ b/pages/home/home.vue
@@ -115,20 +115,20 @@ export default {
   border-radius: 0 0 20px 20px;
 }
 .home-hospital {
-  font-size: 17px;
+  font-size: $font-size-lg;
   font-weight: 700;
   display: flex;
   align-items: center;
   gap: 6px;
 }
 .home-welcome {
-  font-size: 12px;
+  font-size: $font-size-xs;
   opacity: 0.85;
   margin-top: 4px;
 }
 .quick-section { padding: 16px 16px 8px; }
 .section-title {
-  font-size: 14px;
+  font-size: $font-size-md;
   font-weight: 600;
   color: $text-primary;
   margin-bottom: 12px;
@@ -158,7 +158,7 @@ export default {
   justify-content: center;
 }
 .quick-item text {
-  font-size: 13px;
+  font-size: $font-size-base;
   color: $text-primary;
   font-weight: 500;
   text-align: center;
@@ -182,12 +182,12 @@ export default {
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 18px;
+  font-size: $font-size-lg;
   background: #f0f0f0;
   flex-shrink: 0;
 }
 .recent-info { flex: 1; }
-.recent-info .name { font-size: 13px; color: $text-primary; font-weight: 500; }
-.recent-info .detail { font-size: 11px; color: $text-placeholder; margin-top: 2px; }
-.recent-time { font-size: 10px; color: #bbbbbb; }
+.recent-info .name { font-size: $font-size-base; color: $text-primary; font-weight: 500; }
+.recent-info .detail { font-size: $font-size-xs; color: $text-placeholder; margin-top: 2px; }
+.recent-time { font-size: calc(10 * var(--font-scale) * 1px); color: #bbbbbb; }
 </style>
diff --git a/pages/index/index.vue b/pages/index/index.vue
index 7ecb785..6522d22 100644
--- a/pages/index/index.vue
+++ b/pages/index/index.vue
@@ -124,23 +124,23 @@ export default {
 }
 </script>
 
-<style scoped>
+<style lang="scss" scoped>
 .page { padding: 20rpx; background: #f5f5f5; min-height: 100vh; }
 
 .user-bar { display: flex; justify-content: space-between; align-items: center; background: #fff; padding: 30rpx; border-radius: 12rpx; margin-bottom: 20rpx; }
 .user-left { display: flex; align-items: center; gap: 16rpx; }
-.username { font-size: 32rpx; font-weight: bold; color: #333; }
-.role-tag { font-size: 22rpx; padding: 4rpx 12rpx; border-radius: 4rpx; background: #007aff; color: #fff; }
+.username { font-size: $font-size-lg; font-weight: bold; color: #333; }
+.role-tag { font-size: $font-size-xs; padding: 4rpx 12rpx; border-radius: 4rpx; background: #007aff; color: #fff; }
 .role-tag.admin { background: #f0ad4e; }
-.mode-tag { font-size: 22rpx; padding: 4rpx 12rpx; border-radius: 4rpx; background: #4cd964; color: #fff; }
+.mode-tag { font-size: $font-size-xs; padding: 4rpx 12rpx; border-radius: 4rpx; background: #4cd964; color: #fff; }
 .mode-tag.offline { background: #ff9900; }
 
-.btn-scan { background: linear-gradient(135deg, #667eea, #764ba2); color: #fff; margin-bottom: 20rpx; height: 100rpx; line-height: 100rpx; font-size: 32rpx; border-radius: 12rpx; }
+.btn-scan { background: linear-gradient(135deg, #667eea, #764ba2); color: #fff; margin-bottom: 20rpx; height: 100rpx; line-height: 100rpx; font-size: $font-size-lg; border-radius: 12rpx; }
 
 .grid-item-inner { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 30rpx 0; }
-.grid-text { font-size: 32rpx; font-weight: bold; color: #333; margin-top: 16rpx; }
-.grid-desc { font-size: 26rpx; color: #999; }
-.info-bar { display: flex; justify-content: space-between; padding: 20rpx; font-size: 24rpx; color: #999; }
+.grid-text { font-size: $font-size-lg; font-weight: bold; color: #333; margin-top: 16rpx; }
+.grid-desc { font-size: $font-size-base; color: #999; }
+.info-bar { display: flex; justify-content: space-between; padding: 20rpx; font-size: $font-size-sm; color: #999; }
 
-.btn-logout { margin-top: 20rpx; color: #666; font-size: 28rpx; background: #fff; height: 90rpx; line-height: 90rpx; }
+.btn-logout { margin-top: 20rpx; color: #666; font-size: $font-size-md; background: #fff; height: 90rpx; line-height: 90rpx; }
 </style>
diff --git a/pages/inout/in.vue b/pages/inout/in.vue
index 7d04272..36acf54 100644
--- a/pages/inout/in.vue
+++ b/pages/inout/in.vue
@@ -434,7 +434,7 @@ export default {
 
 // 单位文本
 .unit-text {
-  font-size: 14px;
+  font-size: $font-size-md;
   color: #666;
   margin-left: 8px;
 }
@@ -443,7 +443,7 @@ export default {
 .hazard-tag {
   padding: 4rpx 16rpx;
   border-radius: 4rpx;
-  font-size: 12px;
+  font-size: $font-size-xs;
   color: #fff;
 }
 
@@ -455,7 +455,7 @@ export default {
 
 .btn-sm {
   padding: 0 12px;
-  font-size: 13px;
+  font-size: $font-size-base;
   height: 32px;
   line-height: 32px;
 }
@@ -476,7 +476,7 @@ export default {
 }
 
 .scan-status-text {
-  font-size: 13px;
+  font-size: $font-size-base;
   color: #007AFF;
 }
 
diff --git a/pages/inout/out.vue b/pages/inout/out.vue
index 8dd2c09..0c6747a 100644
--- a/pages/inout/out.vue
+++ b/pages/inout/out.vue
@@ -368,7 +368,7 @@ export default {
 
 // 单位文本
 .unit-text {
-  font-size: 14px;
+  font-size: $font-size-md;
   color: #666;
   margin-left: 8px;
 }
@@ -380,14 +380,14 @@ export default {
 
 // 提示文本
 .hint-text {
-  font-size: 12px;
+  font-size: $font-size-xs;
   color: #999;
   margin-top: 4px;
 }
 
 .btn-sm {
   padding: 0 12px;
-  font-size: 13px;
+  font-size: $font-size-base;
   height: 32px;
   line-height: 32px;
 }
diff --git a/pages/ledger/ledger-in.vue b/pages/ledger/ledger-in.vue
index 11c6a57..03b387c 100644
--- a/pages/ledger/ledger-in.vue
+++ b/pages/ledger/ledger-in.vue
@@ -18,8 +18,8 @@
           <view class="data-card-row"><text>入库时间</text><text class="val">{{ item.time }}</text></view>
         </view>
       </view>
-      <view style="padding: 8px 16px;">
-        <button class="btn btn-outline" style="width:100%;height:36px;font-size:12px;" @click="handleReset">重置筛选</button>
+      <view class="filter-reset-area">
+        <button class="btn btn-outline filter-reset-btn" @click="handleReset">重置筛选</button>
       </view>
     </scroll-view>
   </view>
@@ -50,3 +50,17 @@ export default {
   }
 }
 </script>
+
+<style lang="scss" scoped>
+@import '@/styles/variables.scss';
+
+.filter-reset-area {
+  padding: 8px 16px;
+}
+
+.filter-reset-btn {
+  width: 100%;
+  height: 36px;
+  font-size: $font-size-sm;
+}
+</style>
diff --git a/pages/login/login.vue b/pages/login/login.vue
index 4dced01..9492d15 100644
--- a/pages/login/login.vue
+++ b/pages/login/login.vue
@@ -137,14 +137,14 @@ export default {
 
 .login-title {
   color: #ffffff;
-  font-size: 22px;
+  font-size: $font-size-xl;
   font-weight: 700;
   margin-bottom: 6px;
 }
 
 .login-subtitle {
   color: rgba(255, 255, 255, 0.8);
-  font-size: 13px;
+  font-size: $font-size-base;
   margin-bottom: 32px;
 }
 
@@ -164,7 +164,7 @@ export default {
   border-radius: 10px;
   padding: 0 16px;
   color: #ffffff;
-  font-size: 15px;
+  font-size: $font-size-md;
 }
 
 .login-input::placeholder {
@@ -178,7 +178,7 @@ export default {
   color: #1890ff;
   border: none;
   border-radius: 10px;
-  font-size: 16px;
+  font-size: $font-size-lg;
   font-weight: 700;
   line-height: 48px;
 }
@@ -188,14 +188,14 @@ export default {
   align-items: center;
   gap: 6px;
   color: rgba(255, 255, 255, 0.8);
-  font-size: 12px;
+  font-size: $font-size-xs;
   margin-top: 12px;
 }
 
 .login-version {
   padding-top: 24px;
   color: rgba(255, 255, 255, 0.5);
-  font-size: 11px;
+  font-size: $font-size-xs;
   text-align: center;
 }
 </style>
diff --git a/pages/settings/device.vue b/pages/settings/device.vue
index 3f03a4d..8e2a08d 100644
--- a/pages/settings/device.vue
+++ b/pages/settings/device.vue
@@ -42,8 +42,7 @@
             </view>
             <view class="info-row">
               <text class="label">说明</text>
-              <text class="value" style="font-size:12px;color:#999;">
-                {{ scanMode === 'uniapp' ? '使用默认摄像头扫码' : scanMode === 'idata' ? '仅支持 iData 设备内置扫码' : '通用 Android PDA 设备' }}
+              <text class="value value-desc">{{ scanMode === 'uniapp' ? '使用默认摄像头扫码' : scanMode === 'idata' ? '仅支持 iData 设备内置扫码' : '通用 Android PDA 设备' }}
               </text>
             </view>
           </view>
@@ -300,4 +299,9 @@ export default {
   gap: $spacing-sm;
   margin-top: $spacing-base;
 }
+
+.value-desc {
+  font-size: $font-size-xs;
+  color: #999;
+}
 </style>
diff --git a/pages/settings/index.vue b/pages/settings/index.vue
index 6158b74..8e1cf4f 100644
--- a/pages/settings/index.vue
+++ b/pages/settings/index.vue
@@ -98,7 +98,22 @@
           </view>
         </view>
 
-        <!-- 分组4：高级设置 -->
+        <!-- 分组4：其他设置 -->
+        <view class="settings-group">
+          <view class="settings-item" @click="navigateTo('/pages/settings/other-settings')">
+            <view class="s-icon" style="background:#f9f0ff;">
+              <uni-icons type="font" size="20" color="#722ed1"></uni-icons>
+            </view>
+            <view class="s-text">
+              <text class="s-title">其他设置</text>
+              <text class="s-desc">字体大小、显示设置</text>
+            </view>
+            <text class="s-extra">{{ currentFontLabel }}</text>
+            <uni-icons type="right" size="14" color="#cccccc"></uni-icons>
+          </view>
+        </view>
+
+        <!-- 分组5：高级设置 -->
         <view class="settings-group">
           <view class="settings-item" @click="navigateTo('/pages/settings/env-config')">
             <view class="s-icon" style="background:#fff7e6;">
@@ -112,7 +127,7 @@
           </view>
         </view>
 
-        <!-- 分组5：退出登录 -->
+        <!-- 分组6：退出登录 -->
         <view class="settings-group">
           <view class="settings-item" @click="handleLogout">
             <view class="s-icon" style="background:#fff1f0;">
@@ -136,15 +151,22 @@
 </template>
 
 <script>
-import { mapGetters } from 'vuex'
+import { mapGetters, mapGetters as mapFontGetters } from 'vuex'
 import { api } from '@/api'
 export default {
   computed: {
     // 检查设备是否已配置（从 Vuex store 获取）
     ...mapGetters('print', ['hasSavedConfig']),
     ...mapGetters('user', ['enterpriseName', 'enterpriseInfo']),
+    // 从 Vuex 读取字体标签
+    ...mapFontGetters('font', ['fontScaleLabel']),
     deviceConfigured() {
       return this.hasSavedConfig
+    },
+    
+    // 显示字体标签
+    currentFontLabel() {
+      return this.fontScaleLabel || '默认'
     }
   },
   data() {
@@ -164,6 +186,7 @@ export default {
       const enterpriseInfo = await this.$store.dispatch('user/getEnterpriseInfo')
       this.hospitalName = enterpriseInfo.fullEnterpriseName
     },
+    
     navigateTo(path) { uni.navigateTo({ url: path }) },
     handleLogout() {
       uni.showModal({
@@ -277,7 +300,7 @@ export default {
 
 .s-arrow {
   color: #cccccc;
-  font-size: 14px;
+  font-size: $font-size-md;
 }
 
 .version-info {
diff --git a/pages/settings/other-settings.vue b/pages/settings/other-settings.vue
new file mode 100644
index 0000000..46e3b66
--- /dev/null
+++ b/pages/settings/other-settings.vue
@@ -0,0 +1,297 @@
+<template>
+  <view class="page-container">
+    <scroll-view class="page-body" scroll-y>
+      <view class="settings-section">
+        <!-- 字体大小调整 -->
+        <view class="setting-card">
+          <view class="card-header">
+            <uni-icons type="font" size="20" color="#722ed1"></uni-icons>
+            <text class="card-title">字体大小</text>
+          </view>
+          
+          <view class="font-preview">
+            <text class="preview-text" :style="{ fontSize: previewFontSize + 'px' }">预览文字大小</text>
+          </view>
+          
+          <view class="slider-section">
+            <view class="slider-labels">
+              <text class="label-small">小</text>
+              <text class="label-current">{{ currentFontLabel }}</text>
+              <text class="label-large">大</text>
+            </view>
+            
+            <slider
+              class="font-slider"
+              :value="sliderValue"
+              :min="0"
+              :max="3"
+              :step="1"
+              :activeColor="sliderColor"
+              :backgroundColor="'#e8e8e8'"
+              block-size="24"
+              @change="onSliderChange"
+              @changing="onSliderChanging"
+              show-value
+            />
+            
+            <view class="slider-values">
+              <text class="value-text">100%</text>
+              <text class="value-text">125%</text>
+              <text class="value-text">150%</text>
+              <text class="value-text">200%</text>
+            </view>
+          </view>
+          
+          <view class="font-actions">
+            <button class="btn-reset" @click="resetToDefault">恢复默认</button>
+          </view>
+        </view>
+        
+        <!-- 提示信息 -->
+        <view class="tip-card">
+          <uni-icons type="info" size="16" color="#fa8c16"></uni-icons>
+          <text class="tip-text">调整后会立即生效，所有页面的文字大小都会同步变化</text>
+        </view>
+      </view>
+    </scroll-view>
+  </view>
+</template>
+
+<script>
+import { mapState, mapGetters } from 'vuex'
+
+export default {
+  data() {
+    return {
+      // 字体大小选项
+      fontSizeOptions: [
+        { label: '默认', value: 1.0, desc: '标准字体', sliderIndex: 0 },
+        { label: '大', value: 1.25, desc: '放大 25%', sliderIndex: 1 },
+        { label: '较大', value: 1.5, desc: '放大 50%', sliderIndex: 2 },
+        { label: '最大', value: 2.0, desc: '放大 100%', sliderIndex: 3 }
+      ],
+      previewFontSize: 16
+    }
+  },
+  computed: {
+    // 从 Vuex 读取字体状态
+    ...mapState('font', ['fontScale']),
+    ...mapGetters('font', ['fontScaleLabel']),
+    
+    // 当前滑块值
+    sliderValue: {
+      get() {
+        const option = this.fontSizeOptions.find(opt => opt.value === this.fontScale)
+        return option ? option.sliderIndex : 0
+      },
+      set(value) {
+        // 滑块值改变时应用到 Vuex
+        this.applyFontSetting(value)
+      }
+    },
+    
+    // 当前字体标签
+    currentFontLabel() {
+      return this.fontScaleLabel
+    },
+    
+    // 滑块颜色
+    sliderColor() {
+      const colors = ['#52c41a', '#1890ff', '#fa8c16', '#f5222d']
+      return colors[this.sliderValue] || '#1890ff'
+    }
+  },
+  onLoad() {
+    // 初始化时应用当前字体设置到预览
+    this.updatePreview()
+  },
+  methods: {
+    /**
+     * 滑块值改变（拖动结束）
+     */
+    onSliderChange(e) {
+      const index = e.detail.value
+      this.applyFontSetting(index)
+    },
+    
+    /**
+     * 滑块值改变（拖动中）
+     */
+    onSliderChanging(e) {
+      const index = e.detail.value
+      const option = this.fontSizeOptions[index]
+      if (option) {
+        // 拖动中只更新预览，不实际应用
+        this.previewFontSize = 16 * option.value
+      }
+    },
+    
+    /**
+     * 应用字体设置到 Vuex
+     */
+    applyFontSetting(sliderIndex) {
+      const option = this.fontSizeOptions[sliderIndex]
+      if (!option) return
+      
+      // 通过 Vuex action 设置字体
+      this.$store.dispatch('font/setFontScale', {
+        scale: option.value,
+        label: option.label
+      })
+      
+      // 提示用户
+      uni.showToast({
+        title: `已设置为${option.label}`,
+        icon: 'success',
+        duration: 1500
+      })
+      
+      this.updatePreview()
+    },
+    
+    /**
+     * 更新预览字体大小
+     */
+    updatePreview() {
+      // 基准字体大小 16px，根据缩放比例计算预览大小
+      this.previewFontSize = 16 * this.fontScale
+    },
+    
+    /**
+     * 恢复默认设置
+     */
+    resetToDefault() {
+      uni.showModal({
+        title: '提示',
+        content: '确定要恢复默认字体大小吗？',
+        success: (res) => {
+          if (res.confirm) {
+            // 通过 Vuex action 重置字体
+            this.$store.dispatch('font/resetFontScale')
+            
+            uni.showToast({
+              title: '已恢复默认',
+              icon: 'success'
+            })
+            
+            this.updatePreview()
+          }
+        }
+      })
+    }
+  }
+}
+</script>
+
+<style lang="scss" scoped>
+.settings-section {
+  padding: $spacing-md;
+}
+
+.setting-card {
+  background: #ffffff;
+  border-radius: $border-radius-md;
+  padding: $spacing-lg;
+  margin-bottom: $spacing-base;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
+}
+
+.card-header {
+  display: flex;
+  align-items: center;
+  gap: $spacing-sm;
+  margin-bottom: $spacing-lg;
+  
+  .card-title {
+    font-size: $font-size-md;
+    color: $text-primary;
+    font-weight: 600;
+  }
+}
+
+.font-preview {
+  background: #f9f9f9;
+  border-radius: $border-radius-sm;
+  padding: $spacing-lg;
+  text-align: center;
+  margin-bottom: $spacing-lg;
+  
+  .preview-text {
+    color: $text-primary;
+    font-weight: 500;
+  }
+}
+
+.slider-section {
+  margin-bottom: $spacing-lg;
+  
+  .slider-labels {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: $spacing-sm;
+    
+    .label-small,
+    .label-large {
+      font-size: $font-size-sm;
+      color: $text-placeholder;
+    }
+    
+    .label-current {
+      font-size: $font-size-md;
+      color: $primary-color;
+      font-weight: 600;
+    }
+  }
+  
+  .font-slider {
+    margin: $spacing-sm 0;
+  }
+  
+  .slider-values {
+    display: flex;
+    justify-content: space-between;
+    padding: 0 $spacing-xs;
+    
+    .value-text {
+      font-size: $font-size-xs;
+      color: $text-placeholder;
+    }
+  }
+}
+
+.font-actions {
+  display: flex;
+  justify-content: center;
+  
+  .btn-reset {
+    background: #fff;
+    color: $text-secondary;
+    border: 1px solid $border-light;
+    border-radius: $border-radius-sm;
+    padding: $spacing-sm $spacing-lg;
+    font-size: $font-size-sm;
+    line-height: 1.5;
+    
+    &::after {
+      border: none;
+    }
+  }
+}
+
+.tip-card {
+  background: #fff7e6;
+  border-radius: $border-radius-sm;
+  padding: $spacing-md;
+  display: flex;
+  align-items: flex-start;
+  gap: $spacing-sm;
+  
+  .tip-text {
+    font-size: $font-size-sm;
+    color: #d48806;
+    line-height: 1.6;
+    flex: 1;
+  }
+}
+</style>
diff --git a/pages/settings/waste-list.vue b/pages/settings/waste-list.vue
index ad19614..1e468d3 100644
--- a/pages/settings/waste-list.vue
+++ b/pages/settings/waste-list.vue
@@ -46,7 +46,7 @@ export default {
   border-bottom: 1px solid #f0f0f0;
   
   .page-title {
-    font-size: 18px;
+    font-size: $font-size-lg;
     font-weight: 600;
     color: #333333;
   }
@@ -66,12 +66,12 @@ export default {
   justify-content: space-between;
   
   .item-name {
-    font-size: 15px;
+    font-size: $font-size-md;
     color: #333333;
   }
 
   .item-code {
-    font-size: 14px;
+    font-size: $font-size-base;
     color: #999999;
     margin-left: auto;
   }
diff --git a/pages/testpages/bleconfig.vue b/pages/testpages/bleconfig.vue
index a318805..50f6348 100644
--- a/pages/testpages/bleconfig.vue
+++ b/pages/testpages/bleconfig.vue
@@ -157,14 +157,16 @@ export default {
 };
 </script>
 
-<style>
+<style lang="scss">
+@import '@/styles/variables.scss';
+
 .device-item, .service-item, .char-item {
   padding: 10px;
   border-bottom: 1px solid #ddd;
   margin: 5px 0;
 }
 .mac {
-  font-size: 12px;
+  font-size: $font-size-sm;
   color: gray;
   margin-left: 10px;
 }
diff --git a/pages/testpages/font-test.vue b/pages/testpages/font-test.vue
new file mode 100644
index 0000000..0618265
--- /dev/null
+++ b/pages/testpages/font-test.vue
@@ -0,0 +1,164 @@
+<template>
+  <view class="page-container">
+    <view class="test-section">
+      <view class="test-title">字体缩放测试页面</view>
+      <view class="test-info">
+        <text class="info-item">当前缩放比例: {{ scale }}</text>
+        <text class="info-item">根字体大小: {{ rootFontSize }}</text>
+      </view>
+      
+      <view class="test-group">
+        <view class="group-title">使用 class 的字体大小</view>
+        <view class="test-item">
+          <text class="text-xs">超小字体 (xs: 10px)</text>
+        </view>
+        <view class="test-item">
+          <text class="text-sm">小字体 (sm: 11px)</text>
+        </view>
+        <view class="test-item">
+          <text class="text-base">基础字体 (base: 13px)</text>
+        </view>
+        <view class="test-item">
+          <text class="text-md">中等字体 (md: 14px)</text>
+        </view>
+        <view class="test-item">
+          <text class="text-lg">大字体 (lg: 16px)</text>
+        </view>
+        <view class="test-item">
+          <text class="text-xl">超大字体 (xl: 20px)</text>
+        </view>
+        <view class="test-item">
+          <text class="text-xxl">特大字体 (xxl: 24px)</text>
+        </view>
+      </view>
+      
+      <view class="test-group">
+        <view class="group-title">对比测试（固定 px  vs  rem）</view>
+        <view class="test-item">
+          <text class="fixed-size">固定大小 (14px，不应缩放)</text>
+        </view>
+        <view class="test-item">
+          <text class="rem-size">rem 大小 (0.875rem，应该缩放)</text>
+        </view>
+      </view>
+      
+      <view class="test-actions">
+        <button class="btn btn-primary" @click="goToSettings">去设置页面调整字体</button>
+        <button class="btn btn-outline" @click="refreshTest">刷新测试</button>
+      </view>
+    </view>
+  </view>
+</template>
+
+<script>
+export default {
+  data() {
+    return {
+      scale: 1.0,
+      rootFontSize: '16px'
+    }
+  },
+  onShow() {
+    this.refreshTest()
+  },
+  methods: {
+    refreshTest() {
+      // 从 Vuex 读取当前缩放比例
+      this.scale = this.$store.state.font.fontScale || 1.0
+      
+      // 读取根字体大小
+      try {
+        if (typeof document !== 'undefined' && document.documentElement) {
+          this.rootFontSize = getComputedStyle(document.documentElement).fontSize
+        }
+      } catch (e) {
+        this.rootFontSize = '无法获取'
+      }
+    },
+    
+    goToSettings() {
+      uni.navigateTo({
+        url: '/pages/settings/index'
+      })
+    }
+  }
+}
+</script>
+
+<style lang="scss" scoped>
+@import '@/styles/variables.scss';
+
+.page-container {
+  padding: $spacing-md;
+}
+
+.test-section {
+  background: $bg-card;
+  border-radius: $border-radius-md;
+  padding: $spacing-md;
+}
+
+.test-title {
+  font-size: $font-size-xl;
+  font-weight: 600;
+  color: $text-primary;
+  margin-bottom: $spacing-md;
+  text-align: center;
+}
+
+.test-info {
+  background: $bg-primary;
+  padding: $spacing-sm;
+  border-radius: $border-radius-sm;
+  margin-bottom: $spacing-md;
+  
+  .info-item {
+    display: block;
+    font-size: $font-size-sm;
+    color: $text-secondary;
+    margin-bottom: $spacing-xs;
+  }
+}
+
+.test-group {
+  margin-bottom: $spacing-lg;
+  
+  .group-title {
+    font-size: $font-size-md;
+    font-weight: 600;
+    color: $text-primary;
+    margin-bottom: $spacing-sm;
+    padding-bottom: $spacing-xs;
+    border-bottom: 1px solid $border-color;
+  }
+}
+
+.test-item {
+  padding: $spacing-sm;
+  margin-bottom: $spacing-sm;
+  background: #f9f9f9;
+  border-radius: $border-radius-sm;
+  border-left: 3px solid $primary-color;
+}
+
+/* 字体大小 class */
+.text-xs { font-size: $font-size-xs; }
+.text-sm { font-size: $font-size-sm; }
+.text-base { font-size: $font-size-base; }
+.text-md { font-size: $font-size-md; }
+.text-lg { font-size: $font-size-lg; }
+.text-xl { font-size: $font-size-xl; }
+.text-xxl { font-size: $font-size-xxl; }
+
+/* 对比测试 */
+.fixed-size { font-size: 14px; }
+.rem-size { font-size: 0.875rem; }
+
+.test-actions {
+  margin-top: $spacing-lg;
+  
+  .btn {
+    margin-bottom: $spacing-sm;
+  }
+}
+</style>
diff --git a/pages/waste/adjust.vue b/pages/waste/adjust.vue
index 110b4c3..d06af63 100644
--- a/pages/waste/adjust.vue
+++ b/pages/waste/adjust.vue
@@ -271,7 +271,7 @@ export default {
 }
 
 .type-modal-close {
-  font-size: 18px;
+  font-size: $font-size-lg;
   color: $text-placeholder;
   padding: 4px;
 }
diff --git a/pages/waste/manifest.vue b/pages/waste/manifest.vue
index 573cb45..16cd3c8 100644
--- a/pages/waste/manifest.vue
+++ b/pages/waste/manifest.vue
@@ -327,7 +327,7 @@ export default {
   align-items: center;
 }
 .data-card-toggle {
-  font-size: 12px;
+  font-size: $font-size-xs;
   color: #999;
   font-weight: 400;
 }
@@ -338,7 +338,7 @@ export default {
 .data-card-tag {
   padding: 2px 8px;
   border-radius: 4px;
-  font-size: 12px;
+  font-size: $font-size-xs;
   &.orange {
     background-color: #fff7e6;
     color: #fa8c16;
diff --git a/pages/waste/reprint.vue b/pages/waste/reprint.vue
index f07baba..0a2f6f3 100644
--- a/pages/waste/reprint.vue
+++ b/pages/waste/reprint.vue
@@ -184,14 +184,14 @@ export default {
   color: #ffffff;
   text-align: center;
   padding: 8px 12px;
-  font-size: 14px;
+  font-size: $font-size-md;
   font-weight: 600;
   display: flex;
   justify-content: space-between;
   align-items: center;
 }
 .label-toggle {
-  font-size: 12px;
+  font-size: $font-size-xs;
   font-weight: 400;
   opacity: 0.9;
 }
@@ -211,24 +211,24 @@ export default {
 }
 .label-section-title {
   padding: 10px 0 6px;
-  font-size: 12px;
+  font-size: $font-size-xs;
   font-weight: 600;
   color: $primary-color;
   border-bottom: 1px solid $border-light;
   margin-bottom: 4px;
   &:first-child { padding-top: 0; }
 }
-.label-key { color: $text-secondary; font-size: 13px; }
-.label-val { color: $text-primary; font-size: 13px; font-weight: 500; }
+.label-key { color: $text-secondary; font-size: $font-size-base; }
+.label-val { color: $text-primary; font-size: $font-size-base; font-weight: 500; }
 .label-code {
-  font-size: 11px !important;
+  font-size: $font-size-xs !important;
   word-break: break-all;
   text-align: right;
   max-width: 60%;
 }
 .label-reprint {
   text-align: center;
-  font-size: 20px;
+  font-size: $font-size-xl;
   font-weight: 700;
   color: $danger-color;
   margin-top: 8px;
diff --git a/pages/weigh/generate.vue b/pages/weigh/generate.vue
index c735364..17f2486 100644
--- a/pages/weigh/generate.vue
+++ b/pages/weigh/generate.vue
@@ -438,7 +438,7 @@ export default {
 
 .btn-sm {
   padding: 0 12px;
-  font-size: 13px;
+  font-size: $font-size-base;
   height: 32px;
   line-height: 32px;
 }
@@ -457,7 +457,7 @@ export default {
   
   text {
     margin-left: 4px;
-    font-size: 14px;
+    font-size: $font-size-md;
     color: #333;
   }
 }
diff --git a/store/index.js b/store/index.js
index f80e36d..1556938 100644
--- a/store/index.js
+++ b/store/index.js
@@ -10,6 +10,7 @@ import sync from './modules/sync'
 import print from './modules/print'
 import scale from './modules/scale'
 import scan from './modules/scan'
+import font from './modules/font'
 
 export default new Vuex.Store({
   modules: {
@@ -18,7 +19,8 @@ export default new Vuex.Store({
     sync,
     print,
     scale,
-    scan
+    scan,
+    font
   },
   strict: process.env.NODE_ENV !== 'production'
 })
\ No newline at end of file
diff --git a/store/modules/font.js b/store/modules/font.js
new file mode 100644
index 0000000..1f8b7fa
--- /dev/null
+++ b/store/modules/font.js
@@ -0,0 +1,184 @@
+export default {
+  namespaced: true,
+  
+  state: {
+    // 字体缩放比例：1.0=默认, 1.25=大, 1.5=较大, 2.0=最大
+    fontScale: 1.0,
+    // 字体大小标签
+    fontScaleLabel: '默认'
+  },
+  
+  mutations: {
+    /**
+     * 设置字体缩放比例
+     * @param {Object} state - Vuex state
+     * @param {Object} payload - { scale: number, label: string }
+     */
+    SET_FONT_SCALE(state, payload) {
+      state.fontScale = payload.scale
+      state.fontScaleLabel = payload.label
+    }
+  },
+  
+  actions: {
+    /**
+     * 初始化字体设置
+     * 从本地存储读取用户设置，如果没有则使用默认值
+     */
+    initFontScale({ commit }) {
+      try {
+        // 优先读取用户手动设置
+        const savedFontSize = uni.getStorageSync('userFontScale')
+        
+        if (savedFontSize) {
+          const fontLabels = {
+            1.0: '默认',
+            1.25: '大',
+            1.5: '较大',
+            2.0: '最大'
+          }
+          
+          const label = fontLabels[savedFontSize] || '自定义'
+          commit('SET_FONT_SCALE', { scale: savedFontSize, label })
+          
+          console.log('[Vuex字体] 初始化成功，使用用户设置:', savedFontSize)
+        } else {
+          // 读取系统自动检测的字体缩放
+          const systemScale = uni.getStorageSync('fontScale') || 1.0
+          
+          const fontLabels = {
+            1.0: '默认',
+            1.25: '大',
+            1.5: '较大',
+            2.0: '最大'
+          }
+          
+          const label = fontLabels[systemScale] || '跟随系统'
+          commit('SET_FONT_SCALE', { scale: systemScale, label })
+          
+          console.log('[Vuex字体] 初始化成功，使用系统设置:', systemScale)
+        }
+      } catch (error) {
+        console.error('[Vuex字体] 初始化失败:', error)
+        commit('SET_FONT_SCALE', { scale: 1.0, label: '默认' })
+      }
+    },
+    
+    /**
+     * 设置字体缩放
+     * @param {Object} param - { commit, dispatch }
+     * @param {Object} payload - { scale: number, label: string }
+     */
+    setFontScale({ commit, dispatch }, payload) {
+      try {
+        // 更新 Vuex state
+        commit('SET_FONT_SCALE', payload)
+        
+        // 持久化到本地存储
+        uni.setStorageSync('userFontScale', payload.scale)
+        
+        console.log('[Vuex字体] 字体已设置为:', payload.label, '(', payload.scale, ')')
+        
+        // 应用字体变化到 DOM
+        dispatch('applyFontScale', payload.scale)
+      } catch (error) {
+        console.error('[Vuex字体] 设置失败:', error)
+      }
+    },
+    
+    /**
+     * 应用字体缩放到 DOM
+     * 直接操作根元素字体大小，使所有 rem 单位自动缩放
+     */
+    applyFontScale(_, scale) {
+      const rootFontSize = Math.round(16 * scale * 100) / 100  // 16px 基准
+      
+      console.log(`[Vuex字体] 应用字体缩放: ${rootFontSize}px (scale=${scale})`)
+      
+      // #ifdef H5 || APP-PLUS
+      try {
+        // 设置 document.documentElement
+        if (typeof document !== 'undefined' && document.documentElement) {
+          document.documentElement.style.fontSize = rootFontSize + 'px'
+          console.log('[Vuex字体] ✓ documentElement.fontSize 已设置为', rootFontSize + 'px')
+        }
+        
+        // 设置所有 page 元素
+        if (typeof document !== 'undefined') {
+          const pages = document.querySelectorAll('page')
+          if (pages.length > 0) {
+            pages.forEach(p => p.style.fontSize = rootFontSize + 'px')
+            console.log('[Vuex字体] ✓ 已设置', pages.length, '个 page 元素')
+          }
+          
+          // 设置 body
+          if (document.body) {
+            document.body.style.fontSize = rootFontSize + 'px'
+          }
+        }
+      } catch (e) {
+        console.warn('[Vuex字体] DOM操作失败:', e)
+      }
+      // #endif
+      
+      // #ifdef APP-PLUS
+      // 广播到所有 webview，确保已打开的页面也更新字体
+      setTimeout(() => {
+        try {
+          const allWebviews = plus.webview.all()
+          let count = 0
+          allWebviews.forEach(webview => {
+            try {
+              const fontSize = rootFontSize + 'px'
+              webview.evalJS(`
+                if (document.documentElement) document.documentElement.style.fontSize = '${fontSize}';
+                if (document.body) document.body.style.fontSize = '${fontSize}';
+                document.querySelectorAll('page').forEach(function(p){ p.style.fontSize = '${fontSize}'; });
+              `)
+              count++
+            } catch (e2) {}
+          })
+          console.log(`[Vuex字体] 已广播到 ${count}/${allWebviews.length} 个webview`)
+        } catch (e) {
+          console.warn('[Vuex字体] 广播失败:', e)
+        }
+      }, 200)
+      // #endif
+      
+      // 保存到本地存储，以便其他页面读取
+      uni.setStorageSync('fontScale', scale)
+    },
+    
+    /**
+     * 重置字体为默认大小
+     */
+    resetFontScale({ commit, dispatch }) {
+      try {
+        // 清除用户设置
+        uni.removeStorageSync('userFontScale')
+        
+        // 更新 Vuex state
+        commit('SET_FONT_SCALE', { scale: 1.0, label: '默认' })
+        
+        // 应用默认字体
+        dispatch('applyFontScale', 1.0)
+        
+        console.log('[Vuex字体] 已恢复默认字体大小')
+      } catch (error) {
+        console.error('[Vuex字体] 重置失败:', error)
+      }
+    }
+  },
+  
+  getters: {
+    /**
+     * 获取当前字体缩放比例
+     */
+    fontScale: state => state.fontScale,
+    
+    /**
+     * 获取当前字体大小标签
+     */
+    fontScaleLabel: state => state.fontScaleLabel
+  }
+}
diff --git a/styles/index.scss b/styles/index.scss
index 3cf6f66..7177237 100644
--- a/styles/index.scss
+++ b/styles/index.scss
@@ -7,6 +7,12 @@ page {
   font-size: $font-size-base;
   color: $text-primary;
   line-height: 1.5;
+  
+  /* 
+   * 使用 rem 方案后，不需要设置固定的 font-size
+   * 所有元素使用 rem 单位，会自动相对于根字体大小计算
+   * 根字体大小由 JavaScript 动态设置（document.documentElement.style.fontSize）
+   */
 }
 
 /* 清除默认样式 */
@@ -92,7 +98,7 @@ button {
   
   .back-btn {
     margin-right: 8px;
-    font-size: 20px;
+    font-size: $font-size-xl;
     padding: 4px;
   }
   
@@ -542,7 +548,7 @@ button {
   flex-shrink: 0;
 
   .iconfont {
-    font-size: 22px;
+    font-size: $font-size-xl;
   }
 }
 
@@ -574,7 +580,7 @@ button {
 
 .ledger-arrow {
   color: #cccccc;
-  font-size: 16px;
+  font-size: $font-size-md;
 }
 
 /* 设置页面 */
@@ -601,7 +607,7 @@ button {
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 24px;
+  font-size: $font-size-xl;
 }
 
 .settings-name {
@@ -643,7 +649,7 @@ button {
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 16px;
+  font-size: $font-size-lg;
   background: #f0f0f0;
   margin-right: $spacing-base;
   flex-shrink: 0;
@@ -674,7 +680,7 @@ button {
 
 .s-arrow {
   color: #cccccc;
-  font-size: 14px;
+  font-size: $font-size-md;
 }
 
 .version-info {
@@ -708,7 +714,7 @@ button {
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 18px;
+  font-size: $font-size-lg;
   background: #f0f0f0;
   flex-shrink: 0;
 }
@@ -732,7 +738,7 @@ button {
 
 .sub-menu-arrow {
   color: #cccccc;
-  font-size: 14px;
+  font-size: $font-size-md;
 }
 
 /* 设备管理 */
@@ -756,7 +762,7 @@ button {
 }
 
 .device-icon {
-  font-size: 18px;
+  font-size: $font-size-lg;
 }
 
 .device-title {
diff --git a/styles/variables.scss b/styles/variables.scss
index ec89403..7309839 100644
--- a/styles/variables.scss
+++ b/styles/variables.scss
@@ -1,3 +1,25 @@
+// ============================================
+// 📌 字体大小 - 使用 rem 单位（推荐方案）
+// ============================================
+// 核心原理：
+// 1. rem 相对于根元素（page/html）的字体大小计算
+// 2. 只需要修改根字体大小，所有 rem 会自动缩放
+// 3. 基准：1rem = 16px（浏览器默认值）
+// 4. 字体缩放时，修改 document.documentElement.style.fontSize 即可
+
+// 基础字号（基于 16px 基准）
+$font-size-xs:   0.625rem;  // 10px / 16px
+$font-size-sm:   0.6875rem; // 11px / 16px
+$font-size-base: 0.8125rem; // 13px / 16px
+$font-size-md:   0.875rem;  // 14px / 16px
+$font-size-lg:   1rem;      // 16px / 16px
+$font-size-xl:   1.25rem;   // 20px / 16px
+$font-size-xxl:  1.5rem;    // 24px / 16px
+
+// ============================================
+// 📌 SCSS 变量（主题、颜色等）
+// ============================================
+
 // 主题色
 $primary-color: #1890ff;
 $success-color: #52c41a;
@@ -43,15 +65,6 @@ $border-radius-md: 10px;
 $border-radius-lg: 14px;
 $border-radius-xl: 20px;
 
-// 字体大小
-$font-size-xs: 10px;
-$font-size-sm: 11px;
-$font-size-base: 13px;
-$font-size-md: 14px;
-$font-size-lg: 16px;
-$font-size-xl: 20px;
-$font-size-xxl: 24px;
-
 // 间距
 $spacing-xs: 4px;
 $spacing-sm: 8px;
diff --git a/uni.scss b/uni.scss
index 4148f1f..bb463ef 100644
--- a/uni.scss
+++ b/uni.scss
@@ -39,9 +39,9 @@ $uni-border-color:#c8c7cc;
 /* 尺寸变量 */
 
 /* 文字尺寸 */
-$uni-font-size-sm:12px;
-$uni-font-size-base:14px;
-$uni-font-size-lg:16px;
+$uni-font-size-sm:0.75rem;
+$uni-font-size-base:0.875rem;
+$uni-font-size-lg:1rem;
 
 /* 图片尺寸 */
 $uni-img-size-sm:20px;
@@ -69,11 +69,11 @@ $uni-opacity-disabled: 0.3; // 组件禁用态的透明度
 
 /* 文章场景相关 */
 $uni-color-title: #2C405A; // 文章标题颜色
-$uni-font-size-title:20px;
+$uni-font-size-title:1.25rem;
 $uni-color-subtitle: #555555; // 二级标题颜色
-$uni-font-size-subtitle:26px;
+$uni-font-size-subtitle:1.625rem;
 $uni-color-paragraph: #3F536E; // 文章段落颜色
-$uni-font-size-paragraph:15px;
+$uni-font-size-paragraph:0.9375rem;
 
 // 导入自定义变量文件
 @import '@/styles/variables.scss';
diff --git a/uni_modules/uni-section/components/uni-section/uni-section.vue b/uni_modules/uni-section/components/uni-section/uni-section.vue
index 9a52e0b..896d01b 100644
--- a/uni_modules/uni-section/components/uni-section/uni-section.vue
+++ b/uni_modules/uni-section/components/uni-section/uni-section.vue
@@ -5,8 +5,8 @@
         <slot v-else name="decoration"></slot>
 
         <view class="uni-section-header__content">
-          <text :style="{'font-size':titleFontSize,'color':titleColor}" class="uni-section__content-title" :class="{'distraction':!subTitle}">{{ title }}</text>
-          <text v-if="subTitle" :style="{'font-size':subTitleFontSize,'color':subTitleColor}" class="uni-section-header__content-sub">{{ subTitle }}</text>
+          <text :style="titleFontSize ? {'font-size':titleFontSize,'color':titleColor} : {'color':titleColor}" class="uni-section__content-title" :class="{'distraction':!subTitle}">{{ title }}</text>
+          <text v-if="subTitle" :style="subTitleFontSize ? {'font-size':subTitleFontSize,'color':subTitleColor} : {'color':subTitleColor}" class="uni-section-header__content-sub">{{ subTitle }}</text>
         </view>
 
         <view class="uni-section-header__slot-right">
@@ -53,7 +53,7 @@
 			},
       titleFontSize: {
         type: String,
-        default: '14px'
+        default: ''
       },
 			titleColor:{
 				type: String,
@@ -65,7 +65,7 @@
 			},
       subTitleFontSize: {
         type: String,
-        default: '12px'
+        default: ''
       },
       subTitleColor: {
         type: String,
diff --git a/utils/fontSize.js b/utils/fontSize.js
new file mode 100644
index 0000000..6c6960b
--- /dev/null
+++ b/utils/fontSize.js
@@ -0,0 +1,57 @@
+/**
+ * 字体大小工具函数
+ * 提供响应式字体大小计算能力
+ */
+
+const FONT_BASE = 16 // Android 默认字体大小基准
+const MIN_SCALE = 0.85
+const MAX_SCALE = 1.45
+
+/**
+ * 获取当前字体缩放比例
+ * @returns {number} 缩放比例 (0.85 ~ 1.45)
+ */
+function getFontScale() {
+  if (getApp().globalData && getApp().globalData.fontScale) {
+    return getApp().globalData.fontScale
+  }
+  
+  const stored = uni.getStorageSync('fontScale')
+  if (stored) {
+    return parseFloat(stored)
+  }
+  
+  return 1
+}
+
+/**
+ * 计算响应式字体大小
+ * @param {number} basePx - 基础字体大小(px)
+ * @param {boolean} round - 是否四舍五入取整
+ * @returns {string} - 如 "15px" 或 "14.5px"
+ */
+function responsiveSize(basePx, round = true) {
+  const scale = getFontScale()
+  const size = basePx * scale
+  
+  if (round) {
+    return `${Math.round(size)}px`
+  }
+  return `${Math.round(size * 10) / 10}px`
+}
+
+export default {
+  getFontScale,
+  responsiveSize,
+  
+  // 常用预设
+  presets: {
+    xs: () => responsiveSize(10),
+    sm: () => responsiveSize(11),
+    base: () => responsiveSize(13),
+    md: () => responsiveSize(14),
+    lg: () => responsiveSize(16),
+    xl: () => responsiveSize(20),
+    xxl: () => responsiveSize(24)
+  }
+}