用代码里换页的部分，对页面中页码的输入框进行清空，输入页码，点击跳页的操作，没有任何报错，但是页面的数据始终是第一页的数据，请问要怎么处理？
代码：

import time
from datetime import datetime
from selenium import webdriver
# from selenium.webdriver import ChromeOptions
from selenium.webdriver.chrome.options import Options
 
CHROME_DRIVER = 'chromedriver.exe'
URL_ = 'https://red.library.sh.cn/searchInstance'
TXT_FILE = '文献.txt'  # TODO
MAX_PAGE = 851  # TODO
MAX_ITEM = 8505  # TODO
 
 
class RedLib:
    def __init__(self):
        self.chrome_options = Options()
        # self.chrome_options.add_argument('--headless')
        self.chrome_options.add_experimental_option('excludeSwitches', ['enable-automation'])
        self.chrome_options.add_experimental_option('useAutomationExtension', False)
        self.chrome_options.add_argument("--disable-web-security")
        prefs = {"profile.managed_default_content_settings.images": 2}
        self.chrome_options.add_experimental_option("prefs", prefs)
        self.driver = webdriver.Chrome(executable_path=CHROME_DRIVER, options=self.chrome_options)
        self.driver.execute_cdp_cmd("Page.addScriptToEvaluateOnNewDocument", {
            "source": """
                Object.defineProperty(navigator, 'webdriver', {
                get: () => undefined
                })
            """
        })
 
    def handle_info(self, start_page):
        self.driver.get(URL_)
        time.sleep(5)
        for now_page in range(start_page, 6):  # TODO MAX_PAGE + 1
            print(f'\n当前正处理第{now_page}页，{now_page / MAX_PAGE * 100:.2f}%，{str(datetime.now()).split(" ")[1].split(".")[0]}')
            time.sleep(2)
            # 换页操作
            self.driver.find_element_by_xpath('//input[@class="searchInput"]').clear()
            self.driver.find_element_by_xpath('//input[@class="searchInput"]').send_keys(f'{now_page}')
            self.driver.find_element_by_xpath('//div[@class="pagination"]/button').click()
            time.sleep(2)
            items = 5 if now_page == MAX_PAGE else 10
            for item in range(1, items + 1):
                info = self.driver.find_element_by_xpath(f'//div[@class="s_right"]/div[{item}]/div[@class="book"]').text
                info_text = info.replace('\n', '&&').split('&&更多版本信息')[0]
                print(item, info_text)
                with open(TXT_FILE, 'a', encoding='utf-8') as tf:
                    tf.write(info_text)
                    tf.write('\n')
            # self.driver.find_element_by_xpath('//button[@class="btn-next"]').click()
        self.driver.quit()
 
 
if __name__ == '__main__':
    start_page = 1
    redlib = RedLib()
    redlib.handle_info(start_page)