SCRAPY框架，只得到一组结果，不知道为什么(语言-python)

问题遇到的现象和发生背景

问题相关代码，请勿粘贴截图

import scrapy

class ThreedmSpider(scrapy.Spider):
    name = 'threedm'
    # allowed_domains = ['www.3xxxdm.com']
    start_urls = ['https://www.3dmgame.com/bagua_62_1/']
    # # 生成一个通用URL模板
    # url = "https://www.3dmgame.com/bagua_62_%d/"
    # page_num = 2

    def parse(self, response):
        li_list = response.xpath("/html/body/div[3]/div[2]/div[2]/ul")
        for li in li_list:
            text = li.xpath("./li/a/div[2]/text()").extract_first()
            print(text)
            detail_url = li.xpath("./li/a/@href").extract_first()
            # for detail in detail_url:
            yield scrapy.Request(url=detail_url, callback=self.parse_detail)
            # pass
        # if self.page_num <= 2:
        #     new_url = format(self.url%self.page_num)
        #     self.page_num += 1
        #     # 手动请求发送,callback回调函数专门用于数据解析
        #     yield scrapy.Request(url=new_url, callback=self.parse)

    def parse_detail(self, response):
        detail = response.xpath("/html/body/div[2]/div[2]/div[3]//text()").extract()
        detail = ''.join(detail).strip()
        print(detail)

运行结果及报错内容

(venv) PS C:\Users\Administrator\Desktop\douban\threedmPro> scrapy crawl threedm
周星驰《食神》取景地珍宝海鲜舫 正式告别香港
周星驰电影《食神》取景地——珍宝海鲜舫，正式告别香港，转移至东南亚。

我的解答思路和尝试过的方法

我想要达到的结果

因为就一组