public static function post($url, array $data = [], array $headers = [])
    {
        // $headers = [ 'Content-Type: application/json' ];

        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data); // 发送数据
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        // 执行HTTP请求
        return self::execute($ch);
    }