```

feat(fight): 优化战斗系统技能攻击计算逻辑

- 调整技能攻击时间判断顺序，提前计算总伤害
- 替换随机数生成函数，使用grand包提供更安全的随机数
- 修复暴击计算中的概率判断逻辑，统一使用Meet函数
- 修正技能伤害计算中防御属性获取错误，应使用目标方属性而非攻击方
- 优化基础伤害公式计算顺序，提升性能
- 添加技能伤害调试输出便于问题排查
```

logic/service/fight/fightc.go

@@ -48,9 +48,10 @@ func (f *FightC) processSkillAttack(attacker, defender *input.Input, skill *info
 	attacker.SkillID = uint32(skill.XML.ID) //获取技能ID
 	var SumDamage alpacadecimal.Decimal
 	if skill.AttackTime != 0 { //如果命中
+
+		SumDamage = attacker.CalculatePower(defender, skill)
 		attacker.CalculateCrit(defender, skill) //暴击计算
 		attacker.IsCritical = skill.Crit
-		SumDamage = attacker.CalculatePower(defender, skill)
 	}
 
 	//还原属性

logic/service/fight/info/BattleSkillEntity.go

@@ -10,6 +10,7 @@ import (
 	"strconv"
 
 	"github.com/alpacahq/alpacadecimal"
+	"github.com/gogf/gf/v2/util/grand"
 
 	"github.com/tnnmigga/enum"
 )
@@ -223,9 +224,7 @@ func (s *SkillEntity) CriticalsameTypeBonus() alpacadecimal.Decimal {
 
 func (s *SkillEntity) Criticalrandom() alpacadecimal.Decimal {
 
-	randomnum := s.Rand.Int31n(39) + 217
-	// 10. 随机倍率，随机值除以255
-	randomFactor := alpacadecimal.NewFromInt(int64(randomnum)).Div(alpacadecimal.NewFromInt(255))
+	randomFactor := alpacadecimal.NewFromInt(int64(grand.N(217, 255))).Div(alpacadecimal.NewFromInt(255))
 	return randomFactor
 
 }

logic/service/fight/input/fight.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/alpacahq/alpacadecimal"
 	"github.com/gogf/gf/v2/util/gconv"
+	"github.com/gogf/gf/v2/util/grand"
 )
 
 // 计算暴击
@@ -38,7 +39,7 @@ func (our *Input) CalculateCrit(opp *Input, skill *info.SkillEntity) {
 	}
 
 	//todo 暴击伤害
-	if t, _, _ := our.Player.Roll(625*CritRate, 10000); t {
+	if t := grand.Meet(CritRate, 16); t {
 		skill.Crit = 1
 	}
 
@@ -185,12 +186,12 @@ func (our *Input) CalculatePower(deftype *Input, skill *info.SkillEntity) alpaca
 	switch skill.Category() { //判断技能类型
 	case info.Category.PHYSICAL:
 		attackDec = our.GetProp(0)
-		defenseDec = our.GetProp(1)
+		defenseDec = deftype.GetProp(1)
 
 	case info.Category.SPECIAL:
 
 		attackDec = our.GetProp(2)
-		defenseDec = our.GetProp(3)
+		defenseDec = deftype.GetProp(3)
 
 	default:
 		return alpacadecimal.Zero
@@ -228,10 +229,9 @@ func (our *Input) CalculatePower(deftype *Input, skill *info.SkillEntity) alpaca
 	}
 	// 5. 基础伤害公式：等级因子 * 威力因子 * 攻击 / 防御 / 50 + 2
 	baseDamage := levelFactor.
-		Mul(alpacadecimal.NewFromInt(int64(skill.XML.Power))).
-		Mul(attackDec).
-		Div(defenseDec).
 		Div(alpacadecimal.NewFromInt(50)).
+		Mul(alpacadecimal.NewFromInt(int64(skill.XML.Power))).
+		Mul(attackDec.Div(defenseDec)).
 		Add(alpacadecimal.NewFromInt(2))
 
 	var typeRate alpacadecimal.Decimal
@@ -246,7 +246,7 @@ func (our *Input) CalculatePower(deftype *Input, skill *info.SkillEntity) alpaca
 		Mul(typeRate).                      // 克制系数
 
 		Mul(skill.Criticalrandom()) //随机波动
-
+	println(baseDamage.IntPart(), damage.IntPart(), attackDec.IntPart(), defenseDec.IntPart(), "技能伤害")
 	return damage
 
 }