diff --git a/miniprogram/src/components/TopInset.jsx b/miniprogram/src/components/TopInset.jsx
index d2c7328..bcabd31 100644
--- a/miniprogram/src/components/TopInset.jsx
+++ b/miniprogram/src/components/TopInset.jsx
@@ -32,7 +32,9 @@ export function PageHeader({ no, title, en, sub, back }) {
   // 标题区整体上移 65rpx：从状态栏让位空间中扣除（不是容器偏移，占位实测自动跟随，无空白）
   const SHIFT_PX = Math.round((65 * (windowWidth || 375)) / 750);
   const topPad = Math.max(navH - SHIFT_PX, 24);   // 下限：至少给状态栏留 24px
-  const [h, setH] = useState(0);
+  // 默认占位高度 = 状态栏+导航区+标题内容，避免异步测量前内容被遮挡
+  const defaultH = navH + 80;
+  const [h, setH] = useState(defaultH);
 
   useEffect(() => {
     Taro.nextTick(() => {