diff --git a/example-vite2/src/example/Basic.tsx b/example-vite2/src/example/Basic.tsx
index 7a3a57b..ade8987 100644
--- a/example-vite2/src/example/Basic.tsx
+++ b/example-vite2/src/example/Basic.tsx
@@ -50,7 +50,6 @@ export default function App() {
   const onCountBtnClick = () => {
     const sheets = [
       {
-        name: 'sheet',
         columns: columns,
         dataSource
       }
diff --git a/example-vite2/src/example/CustomStyle.tsx b/example-vite2/src/example/CustomStyle.tsx
index e5db861..c145951 100644
--- a/example-vite2/src/example/CustomStyle.tsx
+++ b/example-vite2/src/example/CustomStyle.tsx
@@ -146,6 +146,9 @@ export default function App() {
             bold: false,
             backgroundColor: 'ff0000',
             textAlign: 'left'
+          },
+          body: {
+            textAlign: 'center'
           }
         }
       }
@@ -153,7 +156,7 @@ export default function App() {
 
     style({
       sheets,
-      filename: 'output.xlsx'
+      filename: 'custom style.xlsx'
     })
   }
 
diff --git a/example-vite2/src/example/HeaderGroup.tsx b/example-vite2/src/example/HeaderGroup.tsx
index bce9eb5..275f9f6 100644
--- a/example-vite2/src/example/HeaderGroup.tsx
+++ b/example-vite2/src/example/HeaderGroup.tsx
@@ -92,7 +92,6 @@ export default function App() {
   const onCountBtnClick = () => {
     const sheets: ISheet[] = [
       {
-        name: 'sheet',
         columns,
         dataSource
       }
@@ -100,7 +99,7 @@ export default function App() {
 
     style({
       sheets,
-      filename: 'moreSheet.xlsx',
+      filename: 'header group.xlsx',
     })
   }
 
diff --git a/example-vite2/src/example/HiddenHeader.tsx b/example-vite2/src/example/HiddenHeader.tsx
index bc11e25..e18605f 100644
--- a/example-vite2/src/example/HiddenHeader.tsx
+++ b/example-vite2/src/example/HiddenHeader.tsx
@@ -181,7 +181,7 @@ export default function App() {
 
     nostyle({
       sheets,
-      filename: 'output.xlsx',
+      filename: 'hidden header.xlsx',
       hiddenHeader: true,
     })
   }
diff --git a/example-vite2/src/example/MoreSheet.tsx b/example-vite2/src/example/MoreSheet.tsx
index edd6e1b..e5d629b 100644
--- a/example-vite2/src/example/MoreSheet.tsx
+++ b/example-vite2/src/example/MoreSheet.tsx
@@ -45,12 +45,10 @@ export default function App() {
   const onCountBtnClick = () => {
     const sheets = [
       {
-        name: 'sheet1',
         columns: columns,
         dataSource
       },
       {
-        name: 'sheet2',
         columns: columns,
         dataSource
       }
@@ -58,7 +56,7 @@ export default function App() {
 
     style({
       sheets,
-      filename: 'moreSheet.xlsx',
+      filename: 'more sheet.xlsx',
     })
   }
 
diff --git a/example-vite2/src/example/NotExportColumn.tsx b/example-vite2/src/example/NotExportColumn.tsx
index 0472ba8..76338c5 100644
--- a/example-vite2/src/example/NotExportColumn.tsx
+++ b/example-vite2/src/example/NotExportColumn.tsx
@@ -46,7 +46,6 @@ export default function App() {
   const onCountBtnClick = () => {
     const sheets = [
       {
-        name: 'sheet',
         columns: columns,
         dataSource,
       }
@@ -54,7 +53,7 @@ export default function App() {
 
     style({
       sheets,
-      filename: 'basic.xlsx',
+      filename: 'not export column.xlsx',
     })
   }
 
diff --git a/example-vite2/src/example/Span.tsx b/example-vite2/src/example/Span.tsx
index 4a44a21..1454ee5 100644
--- a/example-vite2/src/example/Span.tsx
+++ b/example-vite2/src/example/Span.tsx
@@ -162,7 +162,6 @@ export default function App() {
   const onCountBtnClick = () => {
     const sheets = [
       {
-        name: '普通表格',
         columns: columns,
         dataSource,
       }
@@ -170,7 +169,7 @@ export default function App() {
 
     style({
       sheets,
-      filename: 'output.xlsx'
+      filename: '单元格合并.xlsx'
     })
   }
 
diff --git a/example-vite2/src/example/UseWorker.tsx b/example-vite2/src/example/UseWorker.tsx
index e81a2e5..1379627 100644
--- a/example-vite2/src/example/UseWorker.tsx
+++ b/example-vite2/src/example/UseWorker.tsx
@@ -15,7 +15,7 @@ const columns = [
     // in Worker 不能传函数
     render: `
       (val, row, i) => {
-        console.log(val, row, i)
+        // console.log(val, row, i)
         return 'formatted Name: ' + val
       }
     `
@@ -53,7 +53,7 @@ const columns = [
   },
 ]
 
-const filename = 'basic.xlsx'
+const filename = 'work in Worker.xlsx'
 
 export default function App() {
   const workerRef = useRef<Worker>()
diff --git a/src/style.ts b/src/style.ts
index b7e924c..9bee31a 100644
--- a/src/style.ts
+++ b/src/style.ts
@@ -1,6 +1,6 @@
 
 import { write as styleWriteFn } from 'xlsx-style-vite'
-import getCellStyle from './utils/cellStyle'
+import setCellStyle from './utils/setCellStyle'
 import download from './utils'
 import { IExcel } from './type'
 
@@ -8,7 +8,7 @@ export default function style(excelProps: IExcel) {
   return download(
     Object.assign(excelProps, {
       write: styleWriteFn,
-      getCellStyle,
+      setCellStyle
     })
   )
 }
diff --git a/src/type.ts b/src/type.ts
index 54de594..754f9e0 100644
--- a/src/type.ts
+++ b/src/type.ts
@@ -1,13 +1,45 @@
+/**
+ * 主 Excel 配置接口
+ */
+export interface IExcel {
+  sheets: ISheet[];                   // 表格中的工作表列表
+  filename?: string;                  // 导出的文件名
+  hiddenHeader?: boolean;             // 是否隐藏所有工作表的表头
+  worker?: boolean;                   // 是否启用 Worker 多线程
+}
+
+/**
+ * 工作表配置接口
+ */
+export interface ISheet {
+  name?: string;                      // 工作表名称
+  columns: IColumn[];                 // 列配置
+  dataSource: Record<string, any>[];  // 数据源
+  hiddenHeader?: boolean;             // 是否隐藏当前表的表头（优先级高于全局配置）
+  style?: ISheetStyle;                // 样式配置
+}
+
+/**
+ * 样式配置接口（表头和正文）
+ */
+export interface ISheetStyle {
+  header?: IStyleConfig;              // 表头样式配置
+  body?: IStyleConfig;                // 正文样式配置
+}
+
+/**
+ * 列配置接口
+ */
 export type IColumn = {
-  title: string;
-  width?: number;
-  notExport?: boolean;
-  children?: IColumn[];
-  render?: (value: any, row: Record<string, any>, rowIndex: number) => any | string;
-  onCell?: Function | string;
-  colSpan?: number;
+  title: string;                      // 列标题
+  width?: number;                     // 列宽度
+  notExport?: boolean;                // 是否不导出该列
+  children?: IColumn[];               // 子列（支持分组表头）
+  render?: (value: any, row: Record<string, any>, rowIndex: number) => any | string; // 自定义单元格渲染
+  onCell?: Function | string;         // 单元格事件
+  colSpan?: number;                   // 合并列数
+  [key: string]: any;                 // 额外字段支持
 
-  [key: string]: any;
   // dataIndex?: string;  表头分组 父 column 没 dataIndex
   // rootHeight?: number; 
   // leafCount?: number;
@@ -16,85 +48,68 @@ export type IColumn = {
   // merge?: IMerge;
 }
 
-export interface ICellStyle {
-  fontSize?: number;
-  color?: string;
-  bold?: boolean;
-  background?: string;
-  backgroundColor?: string;
-  textAlign?: 'left' | 'center' | 'right';
-  borderColor?: string;
-}
-
-export interface ISheet {
-  name?: string;
-  columns: IColumn[];
-  dataSource: Record<string, any>[];
-  hiddenHeader?: boolean; // 导出表格时，是否隐藏表头。默认显示表头
-  style?: {
-    header?: ICellStyle;
-    body?: ICellStyle;
-  }
-}
-
-export interface IExcel {
-  sheets: ISheet[];
-  filename?: string;
-  hiddenHeader?: boolean; // 导出表格时，是否隐藏所有 sheet 表头
-  worker?: boolean;
-}
-
-// cell 左上角
-export type Point = {
-  r: number;
-  c: number;
+/**
+ * 单元格左上角位置坐标
+ */
+type Point = {
+  r: number;                          // 行索引
+  c: number;                          // 列索引
 }
 
+/**
+ * 单元格合并信息
+ */
 export type IMerge = {
-  title?: string;
-  s: Point;
-  e: Point;
+  title?: string;                     // 合并后的标题
+  s: Point;                           // 合并起始位置
+  e: Point;                           // 合并结束位置
 }
 
-export type getCellStyleType = (
-  {
-    isTitle,
-    style
-  }: {
-    isTitle: boolean,
-    style?: ISheet['style']
-  }
-) => styleType
-
+/**
+ * 用户配置的样式接口
+ */
+export interface IStyleConfig {
+  fontSize?: number;                  // 字体大小
+  color?: string;                     // 字体颜色
+  bold?: boolean;                     // 是否加粗
+  background?: string;                // 背景色（优先级低于 backgroundColor）
+  backgroundColor?: string;           // 背景颜色
+  textAlign?: 'left' | 'center' | 'right'; // 文本对齐方式
+  borderColor?: string;               // 边框颜色
+}
 
-export type Side = 'top' | 'bottom' | 'left' | 'right'
+/**
+ * 边框的方向
+ */
+export type Side = 'top' | 'bottom' | 'left' | 'right';
 
-export type borderType = Record<
-  Side, 
-  {
-    style: string,
+/**
+ * 单个单元格样式
+ */
+export type ICellStyle = {
+  font?: {
+    sz?: number;                      // 字体大小
     color?: {
-      rgb?: string
+      rgb: string;                    // 字体颜色（RGB 格式）
     }
+    bold?: boolean;                   // 是否加粗
   }
->
-
-export type styleType = {
-  font?: {
-    sz?: number,
-    color: {
-      rgb?: string
-    },
-    bold?: Boolean
-  },
   alignment: {
-    horizontal?: ICellStyle['textAlign'],
-    wrapText: Boolean
-  },
-  border: borderType,
-  fill?: {
+    horizontal: IStyleConfig['textAlign']; // 水平对齐方式
+    wrapText: boolean;                // 是否自动换行
+  }
+  border: Record<
+    Side,
+    {
+      style: string;                  // 边框样式
+      color?: {
+        rgb?: string;                 // 边框颜色（RGB 格式）
+      }
+    }
+  >;
+  fill: {
     fgColor: {
-      rgb: string
+      rgb?: string;                   // 填充颜色（RGB 格式）
     }
   }
 }
diff --git a/src/utils/cellStyle.ts b/src/utils/cellStyle.ts
deleted file mode 100644
index 0a9e7eb..0000000
--- a/src/utils/cellStyle.ts
+++ /dev/null
@@ -1,123 +0,0 @@
-import { 
-  getCellStyleType, 
-  styleType,
-  Side,
-  borderType,
-  ICellStyle,
-} from "../type"
-
-/**
- *  设置单元格样式
- *     isTitle: 是否是表头
- *       style: 用户设置的 style 字面量
- */
-const getCellStyle: getCellStyleType = cellStyle => {
-  let {
-    isTitle,
-    style
-  } = cellStyle
-
-  const s: styleType = {
-    alignment: {
-      horizontal: 'left',
-      wrapText: true
-    },
-    border: getCellBorders()
-  }
-
-  if (!style) {
-    style = {
-      header: {},
-      body: {}
-    }
-  } else {
-    if (!style.header) style.header = {}
-    if (!style.body) style.body = {}
-  }
-
-  isTitle 
-    ? setStyle({
-        s,
-        style: style.header,
-        defaultStyle: {
-          bold: true,
-          backgroundColor: 'dddddd',
-          textAlign: 'center'
-        }
-      })
-    : setStyle({
-        s,
-        style: style.body,
-        defaultStyle: {
-          backgroundColor: 'ffffff',
-          textAlign: 'left'
-        }
-      })
-  return s
-}
-
-/**
- * 返回表格边框 sides: ['top', 'bottom' ...]
- */
-function getCellBorders() {
-  const sides: Side[] = ['top', 'bottom', 'left', 'right']
-  return sides.reduce((obj, side: Side) => {
-    obj[side] = {
-      style: 'thin'
-    }
-    return obj
-  }, {} as borderType)
-}
-
-/**
- * 根据 style，改变 s 部分属性的引用值
- *               s: 每个单元格样式
-*            style: 用户设置的 style 字面量
- *    defaultStyle: 默认样式
- */
-function setStyle({
-  s,      
-  style,
-  defaultStyle
-}: {
-  s: styleType,
-  style?: ICellStyle,
-  defaultStyle: ICellStyle & {
-    backgroundColor: string;
-    textAlign: 'left' | 'center' | 'right';
-  },
-}) {
-  if (!style) return
-  const {
-    fontSize, 
-    color,    
-    bold = defaultStyle.bold,
-    background,
-    backgroundColor = defaultStyle.backgroundColor,
-    textAlign = defaultStyle.textAlign,
-    borderColor
-  } = style
-
-  s.font = {
-    sz: fontSize,
-    color: {
-      rgb: color
-    },
-    bold
-  }
-
-  s.alignment.horizontal = textAlign
-  s.fill = {
-    fgColor: {
-      rgb: background || backgroundColor
-    }
-  }
-
-  for (let side in s.border) {
-    s.border[side as Side].color = {
-      rgb: borderColor
-    }
-  }
-}
-
-export default getCellStyle 
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 52f1218..1df4479 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -2,47 +2,42 @@ import { WorkBook, WritingOptions } from 'xlsx'
 import getSheets from './sheets'
 import s2ab from './s2ab'
 import saveAs from './saveAs'
-import { IExcel, getCellStyleType } from '../type';
+import { IExcel, ISheet, ICellStyle } from '../type'
 
-function download(
-  args: IExcel & 
-  {
-    getCellStyle?: getCellStyleType;
-    write: (data: WorkBook, opts: WritingOptions) => any;
-  }
-): Blob | void {
+type DownloadParams = IExcel & {
+  setCellStyle?: ({ isTitle, style }: { isTitle: boolean, style?: ISheet['style'] }) => ICellStyle
+  write: (data: WorkBook, opts: WritingOptions) => any
+}
+
+export default function download(args: DownloadParams): Blob | void {
   const {
     sheets,
     filename = 'excel.xlsx',
     hiddenHeader,     
     worker,
-    getCellStyle,
+    setCellStyle,
     write,
   } = args
 
   const Sheets = getSheets({
     sheets,
     hiddenHeader,
-    getCellStyle,
+    setCellStyle,
   })
-
-  const wbout: string = write(
-    {
-      Sheets,
-      SheetNames: sheets.map(({ name }, index) => name || `sheet${index}`)
-    }, 
-    {
-      bookType: 'xlsx',
-      type: 'binary',
-    }
-  )
-
+  const workBook: WorkBook = {
+    Sheets,
+    SheetNames: sheets.map(({ name }, index) => name || `sheet${index + 1}`)
+  }
+  const writingOptions: WritingOptions = {
+    bookType: 'xlsx',
+    type: 'binary',
+  }
+  const wbout: string = write(workBook, writingOptions)
   const blob = new Blob([s2ab(wbout)], { type: 'application/octet-stream' })
+
   if (worker) {
     return blob
   } else {
     saveAs(blob, filename)
   }
 }
-
-export default download
diff --git a/src/utils/setCellStyle.ts b/src/utils/setCellStyle.ts
new file mode 100644
index 0000000..2b369d3
--- /dev/null
+++ b/src/utils/setCellStyle.ts
@@ -0,0 +1,108 @@
+import {
+  ISheet,
+  IStyleConfig,
+  ICellStyle,
+  Side
+} from '../type'
+
+/**
+ * 设置单元格样式
+ * @param cellStyleConfig - 包含 isTitle 和 style 的单元格样式配置
+ * @returns 完整的单元格样式对象
+ */
+export default function setCellStyle(
+  cellStyleConfig: { isTitle: boolean, style?: ISheet['style'] }
+): ICellStyle {
+  const { 
+    isTitle, 
+    style = { 
+      header: {}, 
+      body: {} 
+    } 
+  } = cellStyleConfig
+
+  const cellStyle: ICellStyle = {
+    alignment: {
+      horizontal: 'left',
+      wrapText: true,
+    },
+    border: createCellBorders(),
+    fill: {
+      fgColor: {}
+    }
+  }
+
+  // 根据是否是标题设置不同样式
+  const appliedStyle = isTitle 
+    ? { ...defaultHeaderStyle, ...style.header }
+    : { ...defaultBodyStyle, ...style.body }
+
+  applyStyle(cellStyle, appliedStyle)
+
+  return cellStyle
+}
+
+/**
+ * 默认表头样式
+ */
+const defaultHeaderStyle: IStyleConfig = {
+  bold: true,
+  backgroundColor: 'dddddd',
+  textAlign: 'center',
+}
+
+/**
+ * 默认正文样式
+ */
+const defaultBodyStyle: IStyleConfig = {
+  backgroundColor: 'ffffff',
+  textAlign: 'left',
+}
+
+/**
+ * 创建单元格边框样式
+ * @returns 表格边框对象
+ */
+function createCellBorders(): ICellStyle['border'] {
+  const sides: Side[] = ['top', 'bottom', 'left', 'right']
+  return sides.reduce((borders, side) => {
+    borders[side] = { style: 'thin' }
+    return borders
+  }, {} as ICellStyle['border'])
+}
+
+/**
+ * 应用样式
+ * @param target - 待修改的单元格样式
+ * @param source - 用户自定义样式
+ */
+function applyStyle(
+  target: ICellStyle,
+  source: IStyleConfig,
+): void {
+  if (!source) return
+
+  const {
+    fontSize,
+    color,
+    bold,
+    background,
+    backgroundColor = source.backgroundColor,
+    textAlign = source.textAlign,
+    borderColor,
+  } = source
+
+  target.font = {
+    sz: fontSize,
+    color: color ? { rgb: color } : undefined,
+    bold,
+  }
+
+  target.alignment.horizontal = textAlign
+
+  target.fill.fgColor.rgb = background || backgroundColor
+
+  Object.keys(target.border).forEach((side) => {
+    target.border[side as Side].color = borderColor ? { rgb: borderColor } : undefined
+  })
+}
diff --git a/src/utils/sheets.ts b/src/utils/sheets.ts
index c24bfde..4efa0f8 100644
--- a/src/utils/sheets.ts
+++ b/src/utils/sheets.ts
@@ -1,21 +1,22 @@
 import { utils } from 'xlsx'
 import {
+  IExcel,
   ISheet,
-  getCellStyleType,
+  ICellStyle,
   IMerge,
   IColumn,
 } from '../type'
 
 // 获取所有 sheets
-function getSheets(
+export default function getSheets(
   {
     sheets,
-    hiddenHeader: outHiddenHeader,
-    getCellStyle,
+    hiddenHeader: excelHiddenHeader,
+    setCellStyle,
   }: {
     sheets: ISheet[],
-    hiddenHeader?: boolean,
-    getCellStyle?: getCellStyleType
+    hiddenHeader?: IExcel['hiddenHeader'],
+    setCellStyle?: ({ isTitle, style }: { isTitle: boolean, style: ISheet['style'] }) => ICellStyle
   }
 ) {
   return sheets.reduce((map: Record<string, any>, sheet: ISheet, currentIndex: number) => {
@@ -24,7 +25,7 @@ function getSheets(
       columns: originColumns,
       dataSource,
       style,
-      hiddenHeader = outHiddenHeader
+      hiddenHeader = excelHiddenHeader
     } = sheet
 
     const columns = excludeNotExportColumns(originColumns)
@@ -66,11 +67,11 @@ function getSheets(
           v: typeof v === 'string'
             ? v.trim()
             : v,
-          s: typeof getCellStyle === 'function'
-            ? getCellStyle({
-              isTitle,
-              style
-            })
+          s: typeof setCellStyle === 'function'
+            ? setCellStyle({
+                isTitle,
+                style
+              })
             : undefined,
           t: typeof v === 'number' || typeof v === 'string' && v.includes('%')
             ? 'n'
@@ -96,8 +97,6 @@ function getSheets(
   }, {})
 }
 
-export default getSheets
-
 // 获取所有由叶子节点组成的 columns，也就是树的宽度
 function getAllLeafColumns(columns: IColumn[]): IColumn[] {
   const allColumns: IColumn[] = []
@@ -197,7 +196,7 @@ const getDataFromColumnsAndDataSource = (
     rootHeight,
     dataSource
   }: {
-    hiddenHeader?: Boolean,
+    hiddenHeader?: boolean,
     columns: IColumn[],
     leafColumns: IColumn[],
     rootHeight: number,
@@ -323,7 +322,7 @@ function getBodyMerges({
   leafColumns,
   dataSource
 }: {
-  hiddenHeader?: Boolean,
+  hiddenHeader?: boolean,
   rootHeight: number,
   leafColumns: IColumn[],
   dataSource: Record<string, any>[]
diff --git a/tsconfig.build.json b/tsconfig.build.json
index 1815a5a..89be9be 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -5,12 +5,10 @@
     "outDir": "dist",
     "target": "ES5",
     "module": "es2015",
-    "lib": ["dom", "ES5", "ES6"],
-
+    "lib": ["dom", "ES5"],
     "strict": true,
     "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noFallthroughCasesInSwitch": true
+    "noUnusedParameters": true
   },
   "include": [
     "types",
diff --git a/tsconfig.json b/tsconfig.json
index 41f909e..14517c4 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,21 +1,6 @@
 {
+  "extends": "./tsconfig.build.json",
   "compilerOptions": {
-    "moduleResolution": "node",
-    "declaration": true,
     "emitDeclarationOnly": true,
-
-    "outDir": "dist",
-    "target": "ES5",
-    "module": "es2015",
-    "lib": ["dom", "ES5", "ES6"],
-
-    "strict": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noFallthroughCasesInSwitch": true
-  },
-  "include": [
-    "types",
-    "src/index.ts"
-  ]
+  }
 }
\ No newline at end of file