diff --git a/database/model/base.go b/database/model/base.go
index 9e38b49..7e1ada4 100644
--- a/database/model/base.go
+++ b/database/model/base.go
@@ -1,78 +1,25 @@
 package model
 
 import (
-	"database/sql/driver"
-	"encoding/json"
-	"fmt"
 	"time"
+
+	"gorm.io/gorm"
 )
 
-// DateTime 自定义时间类型
-type DateTime struct {
-	time.Time
+// BaseModel 基础模型
+type BaseModel struct {
+	ID         uint   `gorm:"column:id;primaryKey;autoIncrement;common:主键ID" json:"id"`
+	CreateTime string `gorm:"autoCreateTime;column:create_time;type:datetime" json:"create_time"`
+	UpdateTime string `gorm:"autoUpdateTime;column:update_time;type:datetime" json:"update_time"`
 }
 
-// MarshalJSON 实现 JSON 序列化
-func (t DateTime) MarshalJSON() ([]byte, error) {
-	if t.IsZero() {
-		return []byte("null"), nil
-	}
-	return json.Marshal(t.Format("2006-01-02 15:04:05"))
-}
-
-// UnmarshalJSON 实现 JSON 反序列化
-func (t *DateTime) UnmarshalJSON(data []byte) error {
-	var s string
-	if err := json.Unmarshal(data, &s); err != nil {
-		return err
-	}
-	if s == "" || s == "null" {
-		t.Time = time.Time{}
-		return nil
-	}
-
-	parsed, err := time.Parse("2006-01-02 15:04:05", s)
-	if err != nil {
-		return err
-	}
-	t.Time = parsed
+func (b BaseModel) BeforeCreate(tx *gorm.DB) error {
+	b.CreateTime = time.Now().Format("2006-01-02 15:04:05")
+	b.UpdateTime = time.Now().Format("2006-01-02 15:04:05")
 	return nil
 }
 
-// Value 实现 driver.Valuer
-func (t DateTime) Value() (driver.Value, error) {
-	if t.IsZero() {
-		return nil, nil
-	}
-	return t.Time, nil
-}
-
-// Scan 实现 sql.Scanner
-func (t *DateTime) Scan(v interface{}) error {
-	if v == nil {
-		t.Time = time.Time{}
-		return nil
-	}
-
-	switch value := v.(type) {
-	case time.Time:
-		t.Time = value
-		return nil
-	case string:
-		parsed, err := time.Parse("2006-01-02 15:04:05", value)
-		if err != nil {
-			return err
-		}
-		t.Time = parsed
-		return nil
-	default:
-		return fmt.Errorf("unsupported type: %T", v)
-	}
-}
-
-// 基础模型
-type BaseModel struct {
-	ID         uint     `gorm:"column:id;primaryKey;autoIncrement;common:主键ID" json:"id"`
-	CreateTime DateTime `gorm:"autoCreateTime;column:create_time;type:datetime" json:"create_time"`
-	UpdateTime DateTime `gorm:"autoUpdateTime;column:update_time;type:datetime" json:"update_time"`
+func (b BaseModel) BeforeUpdate(tx *gorm.DB) error {
+	b.UpdateTime = time.Now().Format("2006-01-02 15:04:05")
+	return nil
 }