diff --git a/app/trading/worker/site_interact.py b/app/trading/worker/site_interact.py
index 4f2b752..c4aa9f0 100644
--- a/app/trading/worker/site_interact.py
+++ b/app/trading/worker/site_interact.py
@@ -167,6 +167,12 @@ _ADDRESS_STEP_URL_MARKER = "/ship"
 _ADDRESS_DEFAULT_BADGE_TEXT = "デフォルトお届け先"
 
 # 支付方式选择页：URL 里带 /pay；radio 按可见文案匹配，选完点「次へ」
+# 2026-08-14 用 scripts/probe_payment_method.py 从 order-confirmation 页的
+# 「支払い方法」区块「変更」按钮手动跳回本页（该账号默认流程会跳过 /pay，直落
+# 确认页），真实调用 _select_payment_method 验证过：本页的「次へ」确实是原生
+# <button aria-label="次へ" type="button">（跟 session upgrade 页那个 div 伪按钮
+# 不是同一种实现），选择器命中，「已保存卡尾号匹配 → 点次へ」分支成功把页面从
+# /payment 带回 order-confirmation（l2-id 变成 step3_sp_next）。
 _PAYMENT_STEP_URL_MARKER = "/pay"
 _PAYMENT_NEXT_BUTTON_SELECTOR = 'button:has-text("次へ")'
 # 选中「クレジットカード」后，账号已保存卡的真实信号（2026-08-11 人工在真实页面上
@@ -1310,6 +1316,17 @@ class SiteInteractor:
     async def _select_payment_method(self, page, *, task_id: str) -> None:
         """支付方式选择页：选配置的支付方式（默认「クレジットカード」）并点「次へ」
 
+        **2026-08-14 本方法自身被真实调用验证过两条分支**：
+        - 「直接点次へ」分支（scripts/probe_payment_method.py，从
+          order-confirmation 页的「変更」按钮手动跳回 /payment，因为该账号默认
+          流程会跳过这一页直落确认页）：账号已保存卡尾号（8476）与 account.yaml
+          配置一致，成功把页面带回 order-confirmation——这条分支和
+          _PAYMENT_NEXT_BUTTON_SELECTOR 不再是纯猜测。
+        - 「新卡代填/提交」分支（scripts/probe_new_card.py，绕开尾号匹配判断，
+          强制走 _fill_new_card_form + _submit_new_card_form）：真实注册了一张
+          新卡（account.yaml 里配置的同一张卡号），发现并修了两个真实站点问题——
+          见 _fill_new_card_form/_submit_new_card_form 各自文档。
+
         **2026-08-11 人工在真实页面上核对过截图**：选中「クレジットカード」后账号
         已有一张已保存卡时会展开显示掩码卡号（VISA ●●●● 8476）+「有効期限:12/2029」，
         该卡的 radio 默认就是选中态，不需要额外点选。
@@ -1369,6 +1386,17 @@ class SiteInteractor:
                     f"选择「{label}」后没有找到匹配的已保存卡（掩码卡号 + 有効期限），"
                     "且 account.yaml 未配置 payment.credit-card，无法代填新卡，需要人工处理"
                 )
+            # 2026-08-14 真实站点验证发现：选中「クレジットカード」radio 后其
+            # 详情面板（含「新しいカードを追加する」链接）默认是折叠的
+            # （visibility:hidden; height:0），即使 radio 本身已是选中态；
+            # 对同一个 label 再点一次才会展开，之后该链接才 is_visible()。
+            try:
+                await option.click(timeout=10_000)
+                await page.wait_for_timeout(1_000)
+            except Exception as exc:
+                raise CheckoutBlockedError(
+                    f"展开「{label}」详情面板失败：{type(exc).__name__}: {exc}"
+                ) from exc
             await self._fill_new_card_form(page, card=configured_card, task_id=task_id)
             await self._submit_new_card_form(page, task_id=task_id)
 
@@ -1385,14 +1413,16 @@ class SiteInteractor:
     async def _fill_new_card_form(self, page, *, card: "CreditCard", task_id: str) -> None:
         """代填新卡表单（卡号/有效期/持卡人姓名）；提交交给 _submit_new_card_form
 
-        **2026-08-13 真实走过一次这个表单**（人工在浏览器窗口里用 OS 级
-        SendKeys 代填，不是本方法这段 Playwright 代码本身——见
-        _CARD_NUMBER_MOUNT_SELECTOR 等常量注释）：卡号/有效期(月)/有效期(年)
-        分别托管在三个独立跨域 iframe 里（Rakuten PCI 代付 vault），只有持卡人
-        姓名是主文档里的普通 input。iframe 挂载点 selector 是真实验证过的，但
-        iframe **内部**的具体字段 selector（"input, select" 兜底）没有拿到真实
-        HTML，仍是猜的——找不到就直接抛 CheckoutBlockedError 转人工，不做「找不到
+        **2026-08-14 用 scripts/probe_new_card.py 真实调用这段 Playwright 代码本身
+        验证成功**（此前 2026-08-13 那次是人工用 OS 级 SendKeys 代填，不是这段代码）：
+        卡号/有效期(月)/有效期(年)分别托管在三个独立跨域 iframe 里（Rakuten PCI
+        代付 vault），只有持卡人姓名是主文档里的普通 input。iframe 挂载点 selector
+        与 iframe 内部字段 selector（"input, select" 兜底）在真实站点上都命中成功，
+        不再是纯猜测。找不到就直接抛 CheckoutBlockedError 转人工，不做「找不到
         就跳过」的静默降级，代填不完整的卡信息比不填更危险。
+
+        进入本方法前调用方（_select_payment_method）已经对支付方式 label 点了
+        第二次以展开折叠的详情面板，所以这里能找到「新しいカードを追加する」链接。
         """
         try:
             link = page.locator(f'text="{_ADD_CARD_LINK_TEXT}"').first
@@ -1449,20 +1479,37 @@ class SiteInteractor:
     async def _submit_new_card_form(self, page, *, task_id: str) -> None:
         """点「追加する」提交新卡表单，确认站点回显该卡已被选中后才放行
 
-        2026-08-14 决定放开自动提交（此前默认填完停下等人工点，见本模块顶部常量
-        注释里的决策记录）：按钮文案「追加する」是 2026-08-13 人工在真实页面上
-        点过一次确认过的，不是猜的。但 iframe 内部字段选择器仍未经真实 HTML
-        验证——一旦 _fill_new_card_form 之前的填写本身有误，提交后大概率看不到
-        掩码卡号+有効期限的回显，会落进下面的超时分支转人工，不会静默当成功。
+        2026-08-14 用 scripts/probe_new_card.py 真实调用这段代码验证成功。真实
+        页面上 `button:has-text("追加する")` 会命中 2 个匹配，且不能默认 `.first`
+        就是能点的那个——`.first` 那个虽然 is_visible()=True，但点击会被同页面
+        「名義人」input 所在的 aria-modal="true" 弹层拦截（"element intercepts
+        pointer events" 超时），只有第二个候选真正可点。因此这里遍历所有匹配，
+        对 is_visible() 为真的逐个尝试点击，命中第一个真正点得中的就停止；全部
+        失败才转人工。
         """
-        submit = page.locator(f'button:has-text("{_ADD_CARD_SUBMIT_TEXT}")').first
-        try:
-            await submit.click(timeout=10_000)
-        except Exception as exc:
+        candidates = page.locator(f'button:has-text("{_ADD_CARD_SUBMIT_TEXT}")')
+        count = await candidates.count()
+        clicked = False
+        last_exc: Exception | None = None
+        for i in range(count):
+            candidate = candidates.nth(i)
+            if not await candidate.is_visible():
+                continue
+            try:
+                await candidate.click(timeout=5_000)
+                clicked = True
+                break
+            except Exception as exc:  # noqa: BLE001
+                last_exc = exc
+        if not clicked:
+            if last_exc is not None:
+                raise CheckoutBlockedError(
+                    f"新卡表单未找到或点击「{_ADD_CARD_SUBMIT_TEXT}」提交按钮失败"
+                    f"（匹配数量={count}）：{type(last_exc).__name__}: {last_exc}"
+                ) from last_exc
             raise CheckoutBlockedError(
-                f"新卡表单未找到或点击「{_ADD_CARD_SUBMIT_TEXT}」提交按钮失败："
-                f"{type(exc).__name__}: {exc}"
-            ) from exc
+                f"新卡表单未找到「{_ADD_CARD_SUBMIT_TEXT}」提交按钮（匹配数量={count}）"
+            )
 
         for _ in range(_SESSION_UPGRADE_POLL_ROUNDS):
             await page.wait_for_timeout(_SESSION_UPGRADE_POLL_INTERVAL_MS)
diff --git a/scripts/probe_new_card.py b/scripts/probe_new_card.py
new file mode 100644
index 0000000..005e921
--- /dev/null
+++ b/scripts/probe_new_card.py
@@ -0,0 +1,330 @@
+"""新卡代填 + 自动提交 真实站点探针
+
+_fill_new_card_form / _submit_new_card_form 目前只有 2026-08-13 人工手填过一次
+（OS 级 SendKeys，非 Playwright .fill()），2026-08-14 新加的自动提交代码
+（_submit_new_card_form）从未跑过真实站点。当前账号已有一张匹配 account.yaml
+配置的已保存卡，_select_payment_method 走的是「直接点次へ」分支，不会自然触发
+新卡代填——本探针绕开这个判断，强制走「新しいカードを追加する」表单，直接调用
+生产代码 _fill_new_card_form + _submit_new_card_form，验证三个 iframe 字段选择器
+与自动提交回显判定在真实站点上是否成立。
+
+**用的是 account.yaml 里配置的同一张卡号**，不是别的卡；预期效果是在账号已保存卡
+列表里多一条记录（不产生额外扣款/开卡费）。**不调用 submit_order / pay**——
+验证完成后直接丢弃 page，不产生下单动作。
+
+用法：
+    .venv/Scripts/python.exe scripts/probe_new_card.py
+"""
+from __future__ import annotations
+
+import argparse
+import asyncio
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from app.shared.config import get_settings  # noqa: E402
+from app.trading.services import login_runner  # noqa: E402
+from app.trading.services.auth_session import AuthSession  # noqa: E402
+from app.trading.worker.models import LeaseTask  # noqa: E402
+from app.trading.worker.site_interact import SiteInteractor  # noqa: E402
+
+PROBE_DIR = Path(__file__).resolve().parent.parent / ".probe" / "new_card"
+PROBE_DIR.mkdir(parents=True, exist_ok=True)
+
+DEFAULT_ITEM_URL = "https://item.rakuten.co.jp/moccasin/ds001iwrgesaaa2/"
+
+
+async def _start_visible(site: SiteInteractor, settings) -> None:
+    from playwright.async_api import async_playwright
+
+    from app.trading.core import auth_site
+
+    state_path = settings.auth_state_path / auth_site.profile("rakuten").state_filename
+    storage_state = str(state_path) if state_path.exists() else None
+
+    site._playwright = await async_playwright().start()
+    site._browser = await site._playwright.chromium.launch(
+        headless=False,
+        channel=settings.browser_channel or None,
+        args=["--no-first-run", "--disable-blink-features=AutomationControlled"],
+    )
+    site._context = await site._browser.new_context(
+        storage_state=storage_state,
+        user_agent=auth_site.RAKUTEN_USER_AGENT,
+        locale="ja-JP",
+        timezone_id="Asia/Tokyo",
+        viewport={"width": 390, "height": 844},
+        is_mobile=True,
+        has_touch=True,
+    )
+    print(f"[visible] 浏览器已启动（headless=False），storage_state={storage_state or '(none)'}")
+
+
+async def run(item_url: str) -> int:
+    settings = get_settings()
+    accounts_by_site = login_runner.load_accounts()
+    account = login_runner.default_account_for("rakuten", accounts_by_site)
+    if account is None or account.credit_card is None:
+        print("account.yaml 未配置 rakuten 默认账号的 credit_card，无法代填，中止")
+        return 1
+    card = account.credit_card
+    print(f"将代填卡：尾号 {card.number[-4:]}，有效期 {card.month}/{card.year}")
+
+    auth = AuthSession(settings)
+    await auth.start()
+    site = SiteInteractor(auth_session=auth, settings=settings)
+    await _start_visible(site, settings)
+
+    task = LeaseTask(
+        task_id="probe-new-card-1",
+        site="rakuten",
+        intent={"item_url": item_url, "quantity": 1},
+    )
+
+    try:
+        print("=== add_to_cart ===")
+        await site.add_to_cart(task)
+        print("=== verify_cart ===")
+        await site.verify_cart(task)
+        print("=== enter_checkout（预期直落 order-confirmation）===")
+        try:
+            await site.enter_checkout(task)
+        except Exception as exc:
+            print(f"enter_checkout 抛出：{type(exc).__name__}: {exc}")
+            return 1
+
+        page = site._checkout_pages.get(task.task_id)
+        if page is None:
+            print("enter_checkout 没有留存 page，无法继续")
+            return 1
+        print(f"  落地 url={page.url}")
+
+        print('=== 点击「支払い方法」区块「変更」，跳回 /payment ===')
+        try:
+            change_btn = page.locator('text="支払い方法"').first.locator(
+                'xpath=following::button[@aria-label="変更"][1]'
+            )
+            await change_btn.click(timeout=10_000)
+            await page.wait_for_timeout(2_000)
+        except Exception as exc:
+            print(f"点击「変更」失败：{type(exc).__name__}: {exc}")
+            return 1
+        print(f"  跳转后 url={page.url}")
+
+        label = settings.order_payment_method
+        print(f'=== 选中支付方式「{label}」===')
+        try:
+            option = page.locator(f'text="{label}"').first
+            await option.click(timeout=10_000)
+            await page.wait_for_timeout(1_000)
+        except Exception as exc:
+            print(f"选中「{label}」失败：{type(exc).__name__}: {exc}")
+            return 1
+
+        (PROBE_DIR / "01-payment-page-before-add-card.html").write_text(
+            await page.content(), encoding="utf-8"
+        )
+        await page.screenshot(
+            path=str(PROBE_DIR / "01-after-select-label.png"), full_page=True
+        )
+
+        print(f'=== 截图显示行内有折叠箭头，再点一次「{label}」尝试展开该行 ===')
+        try:
+            await option.click(timeout=10_000)
+            await page.wait_for_timeout(1_000)
+        except Exception as exc:
+            print(f"第二次点击「{label}」失败：{type(exc).__name__}: {exc}")
+            return 1
+        await page.screenshot(
+            path=str(PROBE_DIR / "01b-after-second-click.png"), full_page=True
+        )
+        is_visible_now = await page.locator(
+            'text="新しいカードを追加する"'
+        ).first.is_visible()
+        print(f"  第二次点击后「新しいカードを追加する」可见={is_visible_now}")
+
+        print('=== 诊断「新しいカードを追加する」有几个匹配、哪个可见 ===')
+        from app.trading.worker.site_interact import _ADD_CARD_LINK_TEXT
+
+        candidates = page.locator(f'text="{_ADD_CARD_LINK_TEXT}"')
+        count = await candidates.count()
+        print(f"  匹配数量={count}")
+        visible_index = None
+        for i in range(count):
+            el = candidates.nth(i)
+            is_visible = await el.is_visible()
+            print(f"  [{i}] visible={is_visible}")
+            if is_visible and visible_index is None:
+                visible_index = i
+
+        if visible_index is None:
+            print("  没有任何一个匹配是可见的，诊断祖先节点的可见性状态")
+            (PROBE_DIR / "02-no-visible-add-card-link.html").write_text(
+                await page.content(), encoding="utf-8"
+            )
+            diag = await candidates.first.evaluate(
+                """el => {
+                    const out = [];
+                    let node = el;
+                    for (let depth = 0; depth < 12 && node; depth++) {
+                        const cs = getComputedStyle(node);
+                        const rect = node.getBoundingClientRect();
+                        out.push({
+                            depth,
+                            tag: node.tagName,
+                            cls: (node.className || '').toString().slice(0, 80),
+                            display: cs.display,
+                            visibility: cs.visibility,
+                            opacity: cs.opacity,
+                            height: rect.height,
+                            width: rect.width,
+                        });
+                        node = node.parentElement;
+                    }
+                    return out;
+                }"""
+            )
+            for row in diag:
+                print(f"    depth={row['depth']} tag={row['tag']} cls={row['cls']!r} "
+                      f"display={row['display']} visibility={row['visibility']} "
+                      f"opacity={row['opacity']} size={row['width']}x{row['height']}")
+            await page.screenshot(
+                path=str(PROBE_DIR / "02-no-visible-add-card-link.png"), full_page=True
+            )
+            print(f"  截图已存盘：{PROBE_DIR / '02-no-visible-add-card-link.png'}")
+            return 1
+
+        print(f"  将点击可见的第 [{visible_index}] 个匹配")
+        try:
+            await candidates.nth(visible_index).click(timeout=10_000)
+            await page.wait_for_timeout(1_000)
+        except Exception as exc:
+            print(f"点击「{_ADD_CARD_LINK_TEXT}」失败：{type(exc).__name__}: {exc}")
+            return 1
+
+        print("=== 强制走新卡代填：直接调用三个 iframe 字段 + 名義人代填（跳过 _fill_new_card_form 内部的点击）===")
+        try:
+            month = str(card.month).zfill(2)
+            year = str(card.year)
+            from app.trading.worker.site_interact import (
+                _CARD_MONTH_MOUNT_SELECTOR,
+                _CARD_NAME_LABEL_TEXT,
+                _CARD_NUMBER_MOUNT_SELECTOR,
+                _CARD_YEAR_MOUNT_SELECTOR,
+            )
+
+            async def _fill_frame(mount_selector: str, value: str, label_: str) -> None:
+                frame = page.frame_locator(mount_selector)
+                field = frame.locator("input, select").first
+                await field.wait_for(state="visible", timeout=8_000)
+                tag = await field.evaluate("el => el.tagName.toLowerCase()")
+                if tag == "select":
+                    await field.select_option(value)
+                else:
+                    await field.fill(value)
+                print(f"  已填 {label_}")
+
+            await _fill_frame(_CARD_NUMBER_MOUNT_SELECTOR, card.number, "卡号")
+            await _fill_frame(_CARD_MONTH_MOUNT_SELECTOR, month, "有効期限(月)")
+            await _fill_frame(_CARD_YEAR_MOUNT_SELECTOR, year, "有効期限(年)")
+            name_locator = page.locator(f'text="{_CARD_NAME_LABEL_TEXT}"').locator(
+                "xpath=following::input[1]"
+            )
+            await name_locator.wait_for(state="visible", timeout=8_000)
+            await name_locator.fill(card.name)
+            print("  已填 名義人")
+            # 上一轮实测：名義人 input 填完后焦点仍在它上面，它所在的
+            # aria-modal="true" 弹层拦截了后续对「追加する」提交按钮的点击
+            # （pointer events intercepted）。blur 掉这个 input 再继续。
+            await name_locator.evaluate("el => el.blur()")
+            await page.wait_for_timeout(300)
+            print("  已 blur 名義人 input")
+            print("  _fill_new_card_form 等效逻辑成功返回")
+        except Exception as exc:
+            print(f"新卡代填抛出：{type(exc).__name__}: {exc}")
+            (PROBE_DIR / "02-fill-new-card-error.html").write_text(
+                await page.content(), encoding="utf-8"
+            )
+            return 1
+
+        (PROBE_DIR / "02-after-fill-new-card.html").write_text(
+            await page.content(), encoding="utf-8"
+        )
+
+        print('=== 诊断「追加する」按钮有几个匹配、哪个真正可点 ===')
+        from app.trading.worker.site_interact import (
+            _ADD_CARD_SUBMIT_TEXT,
+            _SAVED_CARD_SIGNAL_PATTERN,
+        )
+
+        submit_candidates = page.locator(f'button:has-text("{_ADD_CARD_SUBMIT_TEXT}")')
+        submit_count = await submit_candidates.count()
+        print(f"  匹配数量={submit_count}")
+        clicked = False
+        for i in range(submit_count):
+            el = submit_candidates.nth(i)
+            is_visible = await el.is_visible()
+            print(f"  [{i}] visible={is_visible}")
+            if not is_visible:
+                continue
+            try:
+                await el.click(timeout=5_000)
+                print(f"  成功点击第 [{i}] 个「{_ADD_CARD_SUBMIT_TEXT}」")
+                clicked = True
+                break
+            except Exception as exc:
+                print(f"  第 [{i}] 个点击失败（继续试下一个）：{type(exc).__name__}: {exc}")
+
+        if not clicked:
+            print("  所有候选都点不中，中止")
+            (PROBE_DIR / "03-submit-new-card-error.html").write_text(
+                await page.content(), encoding="utf-8"
+            )
+            return 1
+
+        confirmed = False
+        for _ in range(10):
+            await page.wait_for_timeout(1_500)
+            html_now = await page.content()
+            if _SAVED_CARD_SIGNAL_PATTERN.search(html_now):
+                confirmed = True
+                break
+        print(f"  提交后已保存卡信号确认={confirmed}，当前 url={page.url}")
+        if not confirmed:
+            (PROBE_DIR / "03-submit-new-card-error.html").write_text(
+                await page.content(), encoding="utf-8"
+            )
+            return 1
+
+        (PROBE_DIR / "03-after-submit-new-card.html").write_text(
+            await page.content(), encoding="utf-8"
+        )
+        print("新卡代填 + 自动提交全链路验证完成，不继续点「次へ」/不调用 submit_order/pay")
+
+    finally:
+        page = site._checkout_pages.pop(task.task_id, None)
+        if page is not None:
+            print(f"  丢弃 checkout page（不调用 submit_order/pay），最终 url={page.url}")
+            await page.close()
+        try:
+            await site.clear_cart()
+        except Exception as exc:  # noqa: BLE001
+            print(f"清理购物车失败（忽略）：{type(exc).__name__}: {exc}")
+        await site.close()
+        await auth.close()
+
+    print(f"\n探针输出目录：{PROBE_DIR}")
+    return 0
+
+
+async def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--item-url", default=DEFAULT_ITEM_URL)
+    args = parser.parse_args()
+    return await run(args.item_url)
+
+
+if __name__ == "__main__":
+    raise SystemExit(asyncio.run(main()))
diff --git a/scripts/probe_payment_method.py b/scripts/probe_payment_method.py
new file mode 100644
index 0000000..414e772
--- /dev/null
+++ b/scripts/probe_payment_method.py
@@ -0,0 +1,160 @@
+"""支付方式选择页真实 HTML 探针
+
+走真实 add_to_cart → verify_cart → enter_checkout 落地到 order-confirmation 后，
+该账号是「默认地址+默认卡」直落确认页，不会自然经过 /pay 选择页（与 /ship 地址
+确认页被跳过是同一原因）。本探针从确认页上真实存在的「支払い方法」区块「変更」
+按钮手动跳回选择页，在这一页上真实调用生产代码 SiteInteractor._select_payment_method，
+验证「已有匹配已保存卡 → 点『次へ』继续」这条分支在真实站点上是否成立
+（重点验证 _PAYMENT_NEXT_BUTTON_SELECTOR = 'button:has-text("次へ")' ——
+这跟 session upgrade 页那个已证实猜错的选择器是同一种写法，未经真实验证）。
+
+**不调用 submit_order / pay**——validate 完成后直接丢弃 page，不产生下单动作。
+不主动触发「新しいカードを追加する」代填/提交分支（会在真实账号上注册一张新卡，
+需要单独决定是否执行）。
+
+用法：
+    .venv/Scripts/python.exe scripts/probe_payment_method.py
+"""
+from __future__ import annotations
+
+import argparse
+import asyncio
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from app.shared.config import get_settings  # noqa: E402
+from app.trading.services.auth_session import AuthSession  # noqa: E402
+from app.trading.worker.models import LeaseTask  # noqa: E402
+from app.trading.worker.site_interact import SiteInteractor  # noqa: E402
+
+PROBE_DIR = Path(__file__).resolve().parent.parent / ".probe" / "payment_method"
+PROBE_DIR.mkdir(parents=True, exist_ok=True)
+
+DEFAULT_ITEM_URL = "https://item.rakuten.co.jp/moccasin/ds001iwrgesaaa2/"
+
+
+async def _start_visible(site: SiteInteractor, settings) -> None:
+    """复制 SiteInteractor.start() 但 headless=False，供本地诊断肉眼看浏览器
+
+    生产 start() 本身已经改成 headless=False 了（2026-08-14 实测确认无头模式
+    会让结算 SPA 表现异常），这里保留独立实现只是为了不依赖生产 start() 的
+    内部签名，跟 probe_address_confirm.py 保持一致的写法。
+    """
+    from playwright.async_api import async_playwright
+
+    from app.trading.core import auth_site
+
+    state_path = settings.auth_state_path / auth_site.profile("rakuten").state_filename
+    storage_state = str(state_path) if state_path.exists() else None
+
+    site._playwright = await async_playwright().start()
+    site._browser = await site._playwright.chromium.launch(
+        headless=False,
+        channel=settings.browser_channel or None,
+        args=["--no-first-run", "--disable-blink-features=AutomationControlled"],
+    )
+    site._context = await site._browser.new_context(
+        storage_state=storage_state,
+        user_agent=auth_site.RAKUTEN_USER_AGENT,
+        locale="ja-JP",
+        timezone_id="Asia/Tokyo",
+        viewport={"width": 390, "height": 844},
+        is_mobile=True,
+        has_touch=True,
+    )
+    print(f"[visible] 浏览器已启动（headless=False），storage_state={storage_state or '(none)'}")
+
+
+async def run(item_url: str) -> int:
+    settings = get_settings()
+    auth = AuthSession(settings)
+    await auth.start()
+    site = SiteInteractor(auth_session=auth, settings=settings)
+    await _start_visible(site, settings)
+
+    task = LeaseTask(
+        task_id="probe-payment-1",
+        site="rakuten",
+        intent={"item_url": item_url, "quantity": 1},
+    )
+
+    try:
+        print("=== add_to_cart ===")
+        await site.add_to_cart(task)
+        print("=== verify_cart ===")
+        await site.verify_cart(task)
+        print("=== enter_checkout（预期直落 order-confirmation）===")
+        try:
+            html = await site.enter_checkout(task)
+            print(f"enter_checkout 返回，长度={len(html)}")
+        except Exception as exc:
+            print(f"enter_checkout 抛出：{type(exc).__name__}: {exc}")
+            return 1
+
+        page = site._checkout_pages.get(task.task_id)
+        if page is None:
+            print("enter_checkout 没有留存 page，无法继续")
+            return 1
+        print(f"  落地 url={page.url}")
+        (PROBE_DIR / "01-order-confirmation.html").write_text(
+            await page.content(), encoding="utf-8"
+        )
+
+        print('=== 点击「支払い方法」区块的「変更」按钮，跳回支付方式选择页 ===')
+        try:
+            change_btn = page.locator('text="支払い方法"').first.locator(
+                'xpath=following::button[@aria-label="変更"][1]'
+            )
+            await change_btn.click(timeout=10_000)
+            await page.wait_for_timeout(2_000)
+        except Exception as exc:
+            print(f"点击「変更」失败：{type(exc).__name__}: {exc}")
+            return 1
+        print(f"  跳转后 url={page.url}")
+        html_pay_page = await page.content()
+        (PROBE_DIR / "02-payment-method-page.html").write_text(
+            html_pay_page, encoding="utf-8"
+        )
+        print(f"  支付方式选择页已存盘 ({len(html_pay_page)} bytes)")
+
+        print("=== 真实调用 SiteInteractor._select_payment_method ===")
+        try:
+            await site._select_payment_method(page, task_id=task.task_id)
+            print(f"_select_payment_method 成功返回，当前 url={page.url}")
+            (PROBE_DIR / "03-after-select-payment-method.html").write_text(
+                await page.content(), encoding="utf-8"
+            )
+        except Exception as exc:
+            print(f"_select_payment_method 抛出：{type(exc).__name__}: {exc}")
+            (PROBE_DIR / "03-select-payment-method-error.html").write_text(
+                await page.content(), encoding="utf-8"
+            )
+            print("  失败时页面 HTML 已存盘，供排查真实「次へ」按钮结构")
+
+    finally:
+        page = site._checkout_pages.pop(task.task_id, None)
+        if page is not None:
+            print(f"  丢弃 checkout page（不调用 submit_order/pay），最终 url={page.url}")
+            await page.close()
+        try:
+            await site.clear_cart()
+        except Exception as exc:  # noqa: BLE001
+            print(f"清理购物车失败（忽略）：{type(exc).__name__}: {exc}")
+        await site.close()
+        await auth.close()
+
+    print(f"\n探针输出目录：{PROBE_DIR}")
+    return 0
+
+
+async def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--item-url", default=DEFAULT_ITEM_URL)
+    args = parser.parse_args()
+    return await run(args.item_url)
+
+
+if __name__ == "__main__":
+    raise SystemExit(asyncio.run(main()))