protected function getRules(): array
{
    $rules = $this->rules();
    $scene = $this->getScene();
    
    if (\!$scene || \!isset($this->scenes[$scene]) || \!is_array($this->scenes[$scene])) {
        return $rules;
    }
    
    $sceneRules = [];
    $availableRuleKeys = array_keys($rules);
    
    foreach ($this->scenes[$scene] as $fieldName => $ruleDefinition) {
        // 如果是数组形式(field => rules)，直接覆盖规则
        if (is_string($fieldName) && is_array($ruleDefinition)) {
            $sceneRules[$fieldName] = $ruleDefinition;
        }
        // 如果是字符串形式(引用现有规则)
        elseif (is_numeric($fieldName) && is_string($ruleDefinition) && in_array($ruleDefinition, $availableRuleKeys)) {
            $sceneRules[$ruleDefinition] = $rules[$ruleDefinition];
        }
    }
    
    return $sceneRules;
}