diff --git a/__test__/ElementPosition.test.ts b/__test__/ElementPosition.test.ts
new file mode 100644
index 0000000..6bedc6e
--- /dev/null
+++ b/__test__/ElementPosition.test.ts
@@ -0,0 +1,19 @@
+import { describe, it, expect } from 'vitest'
+import { useElementPosition } from '@/hooks/useElement'
+
+describe('useElementPosition', () => {
+  it('works for totalCount = 40 without throwing', () => {
+    const element = {} as any
+    const count = 10
+    const totalCount = 40
+    const cardSize = { width: 140, height: 200 }
+    const windowSize = { width: 800, height: 600 }
+    const cardIndex = 0
+
+    const result = useElementPosition(element, count, totalCount, cardSize, windowSize, cardIndex)
+    expect(result).toHaveProperty('xTable')
+    expect(result).toHaveProperty('yTable')
+    expect(result).toHaveProperty('scale')
+    expect(typeof result.scale).toBe('number')
+  })
+})
\ No newline at end of file
diff --git a/src/constant/config.ts b/src/constant/config.ts
index bf557ea..613890d 100644
--- a/src/constant/config.ts
+++ b/src/constant/config.ts
@@ -1 +1 @@
-export const SINGLE_TIME_MAX_PERSON_COUNT = 30
+export const SINGLE_TIME_MAX_PERSON_COUNT = 40
\ No newline at end of file
diff --git a/src/hooks/useElement/index.ts b/src/hooks/useElement/index.ts
index 043a356..16e6da6 100644
--- a/src/hooks/useElement/index.ts
+++ b/src/hooks/useElement/index.ts
@@ -262,6 +262,16 @@ const cardRule: CardRule = {
 /**
  * @description 设置抽中卡片的位置
  */
+function createRuleForCount(count: number) {
+    // 动态生成规则：行数在 3-5 之间，尽可能均匀分配
+    const len = Math.min(5, Math.max(3, Math.ceil(count / 10)))
+    const base = Math.floor(count / len)
+    let rem = count % len
+    const rule = Array.from({ length: len }).fill(0).map(() => base + (rem > 0 ? (rem--, 1) : 0))
+    const scale = Math.max(0.9, 1.2 - (len - 3) * 0.1)
+    return { maxLine: Math.min(10, Math.ceil(count / len)), scale, rule, length: len }
+}
+
 export function useElementPosition(
     element: any,
     count: number,
@@ -280,7 +290,8 @@ export function useElementPosition(
         x: 0,
         y: windowSize.height / 2,
     }
-    const { scale, rule, length } = cardRule[totalCount]
+    const ruleObj = cardRule[totalCount] ?? createRuleForCount(totalCount)
+    const { scale, rule, length } = ruleObj
     // 计算缩放后的卡片尺寸
     const scaledCardWidth = cardSize.width * scale
     const scaledCardHeight = cardSize.height * scale
diff --git a/src/style/style.scss b/src/style/style.scss
index 342e40a..16a4f96 100644
--- a/src/style/style.scss
+++ b/src/style/style.scss
@@ -111,4 +111,4 @@
         height: 240px !important;
         object-fit: cover;
     }
-}
\ No newline at end of file
+}