diff --git a/client/buyer_main.py b/client/buyer_main.py
new file mode 100644
index 0000000..fe84d78
--- /dev/null
+++ b/client/buyer_main.py
@@ -0,0 +1,3 @@
+import sys
+from src.ui_main import ui_main
+sys.exit(ui_main())
\ No newline at end of file
diff --git a/client/src/demo1/auto_v1.py b/client/src/demo1/auto_v1.py
new file mode 100644
index 0000000..990c65c
--- /dev/null
+++ b/client/src/demo1/auto_v1.py
@@ -0,0 +1,142 @@
+"""实验脚本：手动跑通"打开商品页 → 进规格面板 → 选颜色尺码"的流程。
+
+**这是实验脚本，正式流程不得导入本文件。**
+
+里面的东西都是为了手动调试方便才这么写的，一样都不能带进正式服务：
+
+- 硬编码的商品号、设备地址、商品标题类名；
+- `print` 输出（正式代码用日志，见 `docs/client/06-quality-security.md` §6）；
+- 写到当前目录的 xml/png（正式代码写 `data/artifacts/`，
+  见 `docs/client/03-data-model.md` §2.1）；
+- 出错就 `return`、不区分原因（正式代码要返回结构化错误，
+  不能把所有失败都变成 `False` 或 `None`，见 `docs/client/02-architecture.md` §9）。
+
+要把这里的逻辑正式化，迁到 PDD 适配层，接口见 `02-architecture.md` §9。
+
+运行前提：手机已连接、已登录拼多多。本脚本**不会下单**——
+最后的 `device.click(*coord)` 是注释掉的，不要随手放开。
+"""
+
+import time
+
+import uiautomator2 as u2
+from util.loaded_pdd import wait_goods_page
+from util.get_size_panle_coord import get_size_panel_coord
+from util.select_color_size import select_color_size
+from util.get_order_button import get_order_button
+
+package_name='com.xunmeng.pinduoduo'
+goods_id="737116531267"
+goods_url=f"https://mobile.yangkeduo.com/goods.html?goods_id={goods_id}"
+goods_title_node_class="androidx.viewpager.widget.ViewPager"
+goods_color="抹茶绿长款"
+goods_size="L（80-115斤）"
+def main():
+    # 连接设备
+    device = u2.connect("192.168.0.173:5555")
+
+    #获取当前应用包名
+    current_package_name=device.app_current()["package"]
+
+    #如果不是拼多多则启动
+    if current_package_name!=package_name:
+        device.app_start(package_name)
+
+    # 等待拼多多启动
+    device.app_wait(package_name)
+
+    # 等待拼多多首页加载完成
+    device.idle_delay=10
+    device.implicitly_wait(5)
+
+    # 打开商品链接
+    device.open_url(goods_url)
+    if wait_goods_page(device):
+        print("商品页面加载完成")
+    else:
+        print("商品页面加载超时")
+        print(device.app_current())
+        device.screenshot("load_timeout.png")
+    # 等待页面跳转完成
+    # device.implicitly_wait(15)
+
+
+    # 获取只能直接获取 Android 无障碍控件树,用来给llm分析改点击哪个
+    goods_home_xml = device.dump_hierarchy(pretty=True)
+    with open(f"{goods_id}_home.xml","w",encoding='utf-8') as f:
+        f.write(goods_home_xml)
+
+    #判断商品标题node是否存在
+    goods_title_node=device(className=goods_title_node_class)
+    if goods_title_node.exists==False:
+        print("在规格面板")
+        return
+    print("在商品详情页")
+    device.screenshot(f"{goods_id}_home.png")
+
+    # 获取规格面板坐标
+    coord=get_size_panel_coord(goods_home_xml)
+    if coord is None:
+        print("解析失败")
+        return
+
+    # 点击进入规格面板
+    device.click(*coord)
+    time.sleep(1)
+
+    print("等待规格面板加载完成")
+
+    color_size_xml = device.dump_hierarchy(pretty=True)
+    with open(f"{goods_id}_size.xml","w",encoding='utf-8') as f:
+        f.write(color_size_xml)
+    device.screenshot(f"{goods_id}_size.png")
+
+    # #尝试滑倒面板下面选择尺码
+    # size_panle_scroller = device(scrollable=True)
+    # if size_panle_scroller.exists==False:
+    #     print("没有找到可滚动的规格面板")
+    #     return
+
+    # #尝试滑动到底部
+    # size_panle_scroller.scroll.toEnd(max_swipes=20, steps=50)
+    # time.sleep(1)
+    # size_panle_xml = device.dump_hierarchy(pretty=True)
+    # with open(f"{goods_id}_size.xml","w",encoding='utf-8') as f:
+    #     f.write(size_panle_xml)
+    # device.screenshot(f"{goods_id}_size.png")
+
+    # #选中颜色分类
+    # color_node=device(text=goods_color)
+    # if color_node.exists==False:
+    #     print("颜色分类不存在")
+    #     return
+    # color_node.click()
+    # time.sleep(1)
+
+    # #选中尺码
+    # size_node=device(text=goods_size)
+    # if size_node.exists==False:
+    #     print("尺码不存在")
+    #     return
+    # size_node.click()
+    # time.sleep(1)
+
+    success = select_color_size(
+      device=device,
+      xml_data=color_size_xml,
+      target_color=goods_color,
+      target_size=goods_size,
+  )
+    if success:
+      print("颜色和尺码选择完成")
+    else:
+      print("没有找到指定颜色或尺码")
+
+    order_xml = device.dump_hierarchy(pretty=True)
+    coord=get_order_button(order_xml)
+    print(coord)
+    # device.click(*coord)
+if __name__ == "__main__":
+    import sys,os
+    sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+    main()
diff --git a/client/src/util/get_order_button.py b/client/src/util/get_order_button.py
new file mode 100644
index 0000000..971615e
--- /dev/null
+++ b/client/src/util/get_order_button.py
@@ -0,0 +1,168 @@
+import re
+import xml.etree.ElementTree as ET
+from typing import Optional, Union
+
+
+XmlData = Union[str, bytes]
+Bounds = tuple[int, int, int, int]
+Coord = tuple[int, int]
+
+_BOUNDS_PATTERN = re.compile(r"^\[(\d+),(\d+)\]\[(\d+),(\d+)\]$")
+_CURRENCY_PATTERN = re.compile(r"[¥￥]")
+_ORDER_WORDS = (
+    "提交订单",
+    "现在买",
+    "立即购买",
+    "确认购买",
+    "去结算",
+    "确认订单",
+    "购买",
+    "下单",
+    "提交",
+    "确认",
+    "结算",
+)
+
+
+def _parse_bounds(value: str) -> Optional[Bounds]:
+    match = _BOUNDS_PATTERN.fullmatch(value.strip())
+    if not match:
+        return None
+
+    left, top, right, bottom = map(int, match.groups())
+    if right <= left or bottom <= top:
+        return None
+    return left, top, right, bottom
+
+
+def _is_available(node: ET.Element) -> bool:
+    return (
+        node.get("visible-to-user", "true") == "true"
+        and node.get("enabled", "true") == "true"
+    )
+
+
+def _node_label(node: ET.Element) -> str:
+    return f'{node.get("text", "")} {node.get("content-desc", "")}'.strip()
+
+
+def _subtree_label(node: ET.Element) -> str:
+    return " ".join(_node_label(item) for item in node.iter("node"))
+
+
+def _screen_size(nodes: list[ET.Element]) -> tuple[int, int]:
+    bounds = [
+        parsed
+        for node in nodes
+        if (parsed := _parse_bounds(node.get("bounds", ""))) is not None
+    ]
+    if not bounds:
+        return 0, 0
+    return max(item[2] for item in bounds), max(item[3] for item in bounds)
+
+
+def _nearest_order_ancestor(
+    node: ET.Element,
+    parents: dict[ET.Element, ET.Element],
+    screen_width: int,
+    screen_height: int,
+) -> Optional[ET.Element]:
+    current: Optional[ET.Element] = node
+
+    while current is not None:
+        bounds = _parse_bounds(current.get("bounds", ""))
+        if (
+            bounds is not None
+            and current.get("clickable") == "true"
+            and _is_available(current)
+        ):
+            width = bounds[2] - bounds[0]
+            height = bounds[3] - bounds[1]
+            center_y = (bounds[1] + bounds[3]) / 2
+
+            # 下单按钮应位于屏幕底部，且不能是覆盖大半屏幕的可点击根节点。
+            if (
+                center_y >= screen_height * 0.80
+                and bounds[3] >= screen_height * 0.88
+                and width >= screen_width * 0.15
+                and height <= screen_height * 0.30
+            ):
+                return current
+        current = parents.get(current)
+    return None
+
+
+def get_order_button_coord(xml_data: XmlData) -> Optional[Coord]:
+    """从规格面板控件树中获取可靠的下单按钮中心坐标。
+
+    ``xml_data`` 应为 ``device.dump_hierarchy()`` 返回的 XML。函数只解析
+    坐标，不执行点击；找不到底部价格、可点击祖先或下单语义时返回 None。
+    """
+    try:
+        root = ET.fromstring(xml_data)
+    except (ET.ParseError, TypeError) as exc:
+        raise ValueError("xml_data 不是有效的无障碍控件树 XML") from exc
+
+    nodes = list(root.iter("node"))
+    screen_width, screen_height = _screen_size(nodes)
+    if screen_width <= 0 or screen_height <= 0:
+        return None
+
+    parents = {
+        child: parent
+        for parent in root.iter()
+        for child in parent
+        if child.tag == "node"
+    }
+
+    # 多个价格文字可能属于同一个下单按钮，使用节点身份去重。
+    candidates: dict[ET.Element, float] = {}
+    for node in nodes:
+        if not _is_available(node):
+            continue
+
+        label = _node_label(node)
+        if not _CURRENCY_PATTERN.search(label):
+            continue
+
+        bounds = _parse_bounds(node.get("bounds", ""))
+        if bounds is None:
+            continue
+
+        center_y = (bounds[1] + bounds[3]) / 2
+        if center_y < screen_height * 0.80:
+            continue
+
+        button = _nearest_order_ancestor(
+            node,
+            parents,
+            screen_width,
+            screen_height,
+        )
+        if button is None:
+            continue
+
+        button_label = _subtree_label(button)
+        matched_words = [word for word in _ORDER_WORDS if word in button_label]
+        if not matched_words:
+            continue
+
+        button_bounds = _parse_bounds(button.get("bounds", ""))
+        if button_bounds is None:
+            continue
+
+        button_center_y = (button_bounds[1] + button_bounds[3]) / 2
+        strongest_word = max(len(word) for word in matched_words)
+        score = strongest_word * 10 + button_center_y / screen_height
+        candidates[button] = max(score, candidates.get(button, float("-inf")))
+
+    if not candidates:
+        return None
+
+    button = max(candidates, key=candidates.get)
+    left, top, right, bottom = _parse_bounds(button.get("bounds", ""))  # type: ignore[misc]
+    return (left + right) // 2, (top + bottom) // 2
+
+
+# 简短别名，推荐使用语义更明确的 get_order_button_coord。
+get_order_button = get_order_button_coord
diff --git a/client/src/util/get_size_panle_coord.py b/client/src/util/get_size_panle_coord.py
new file mode 100644
index 0000000..1bc363a
--- /dev/null
+++ b/client/src/util/get_size_panle_coord.py
@@ -0,0 +1,136 @@
+import re
+import xml.etree.ElementTree as ET
+from typing import Optional, Union
+
+
+Coord = tuple[int, int]
+XmlData = Union[str, bytes]
+
+_BOUNDS_PATTERN = re.compile(
+    r"^\[(?P<left>\d+),(?P<top>\d+)\]"
+    r"\[(?P<right>\d+),(?P<bottom>\d+)\]$"
+)
+_PRICE_PATTERN = re.compile(r"[¥￥](?:\s*\d)?")
+_BUY_WORDS = ("购买", "拼单", "下单", "立即", "单独", "免拼")
+
+
+def _parse_bounds(bounds: str) -> Optional[tuple[int, int, int, int]]:
+    match = _BOUNDS_PATTERN.fullmatch(bounds.strip())
+    if not match:
+        return None
+
+    left, top, right, bottom = (
+        int(match.group(name))
+        for name in ("left", "top", "right", "bottom")
+    )
+    if right <= left or bottom <= top:
+        return None
+    return left, top, right, bottom
+
+
+def _is_available(node: ET.Element) -> bool:
+    return (
+        node.get("visible-to-user", "true") == "true"
+        and node.get("enabled", "true") == "true"
+    )
+
+
+def _node_label(node: ET.Element) -> str:
+    return f'{node.get("text", "")} {node.get("content-desc", "")}'.strip()
+
+
+def _subtree_label(node: ET.Element) -> str:
+    return " ".join(_node_label(item) for item in node.iter("node"))
+
+
+def _nearest_clickable_parent(
+    node: ET.Element,
+    parents: dict[ET.Element, ET.Element],
+) -> Optional[ET.Element]:
+    current: Optional[ET.Element] = node
+    while current is not None:
+        if current.get("clickable") == "true" and _is_available(current):
+            return current
+        current = parents.get(current)
+    return None
+
+
+def get_size_panel_coord(xml_data: XmlData) -> Optional[Coord]:
+    """从拼多多商品详情页控件树中寻找打开规格面板的购买位置。
+
+    返回最可信购买控件的中心坐标 ``(x, y)``；没有找到可靠目标时
+    返回 ``None``。传入内容应为 ``device.dump_hierarchy()`` 返回的 XML。
+    """
+    try:
+        root = ET.fromstring(xml_data)
+    except (ET.ParseError, TypeError) as exc:
+        raise ValueError("xml_data 不是有效的无障碍控件树 XML") from exc
+
+    nodes = list(root.iter("node"))
+    bounds_by_node = {
+        node: bounds
+        for node in nodes
+        if (bounds := _parse_bounds(node.get("bounds", ""))) is not None
+    }
+    if not bounds_by_node:
+        return None
+
+    screen_width = max(bounds[2] for bounds in bounds_by_node.values())
+    screen_height = max(bounds[3] for bounds in bounds_by_node.values())
+    if screen_width <= 0 or screen_height <= 0:
+        return None
+
+    parents = {
+        child: parent
+        for parent in root.iter()
+        for child in parent
+        if child.tag == "node"
+    }
+
+    candidates: list[tuple[float, ET.Element]] = []
+    for node, (left, top, right, bottom) in bounds_by_node.items():
+        if not _is_available(node):
+            continue
+
+        label = _node_label(node)
+        if not _PRICE_PATTERN.search(label):
+            continue
+
+        center_x = (left + right) / 2
+        center_y = (top + bottom) / 2
+        x_ratio = center_x / screen_width
+        y_ratio = center_y / screen_height
+
+        # 购买入口应在商品页右侧底部操作栏，先排除正文价格及弹窗价格。
+        if x_ratio < 0.40 or y_ratio < 0.80:
+            continue
+
+        clickable = _nearest_clickable_parent(node, parents)
+        if clickable is None or clickable not in bounds_by_node:
+            continue
+
+        clickable_label = _subtree_label(clickable)
+        has_buy_semantics = any(word in clickable_label for word in _BUY_WORDS)
+        if not has_buy_semantics:
+            continue
+
+        # 语义可靠性优先，其次选择更靠近右下角且包含数字的价格节点。
+        has_price_number = bool(re.search(r"[¥￥]\s*\d", label))
+        score = (
+            10.0
+            + (3.0 if has_price_number else 0.0)
+            + y_ratio * 2.0
+            + x_ratio
+        )
+        candidates.append((score, clickable))
+
+    if not candidates:
+        return None
+
+    _, target = max(candidates, key=lambda item: item[0])
+    left, top, right, bottom = bounds_by_node[target]
+    return (left + right) // 2, (top + bottom) // 2
+
+
+# 兼容文件名中的 panle 拼写，推荐新代码使用 get_size_panel_coord。
+get_size_panle_coord = get_size_panel_coord
diff --git a/client/src/util/loaded_pdd.py b/client/src/util/loaded_pdd.py
new file mode 100644
index 0000000..eccabdd
--- /dev/null
+++ b/client/src/util/loaded_pdd.py
@@ -0,0 +1,30 @@
+import time
+def wait_goods_page(device, timeout=30):
+    end_time = time.monotonic() + timeout
+
+    while time.monotonic() < end_time:
+        current = device.app_current()
+
+        if current.get("package") != "com.xunmeng.pinduoduo":
+            time.sleep(1)
+            continue
+
+        ready = any([
+            bool(device(textContains="发起拼单").exists),
+            bool(device(textContains="立即购买").exists),
+            bool(device(textContains="单独购买").exists),
+            bool(device(textContains="快要抢光").exists),
+            bool(device(textContains="免拼购买").exists),
+        ])
+
+        loading = any([
+            bool(device(textContains="加载中").exists),
+            bool(device(textContains="正在加载").exists),
+        ])
+
+        if ready and not loading:
+            return True
+
+        time.sleep(1)
+
+    return False
diff --git a/client/src/util/select_color_size.py b/client/src/util/select_color_size.py
new file mode 100644
index 0000000..0921f88
--- /dev/null
+++ b/client/src/util/select_color_size.py
@@ -0,0 +1,607 @@
+import re
+import time
+import xml.etree.ElementTree as ET
+from typing import Any, Optional, Union
+
+
+XmlData = Union[str, bytes]
+Bounds = tuple[int, int, int, int]
+
+_BOUNDS_PATTERN = re.compile(r"^\[(\d+),(\d+)\]\[(\d+),(\d+)\]$")
+_COLOR_HEADINGS = ("颜色分类", "颜色", "款式", "颜色款式")
+
+
+def _parse_xml(xml_data: XmlData) -> ET.Element:
+    try:
+        return ET.fromstring(xml_data)
+    except (ET.ParseError, TypeError) as exc:
+        raise ValueError("xml_data 不是有效的无障碍控件树 XML") from exc
+
+
+def _parse_bounds(value: str) -> Optional[Bounds]:
+    match = _BOUNDS_PATTERN.fullmatch(value.strip())
+    if not match:
+        return None
+
+    left, top, right, bottom = map(int, match.groups())
+    if right <= left or bottom <= top:
+        return None
+    return left, top, right, bottom
+
+
+def _is_available(node: ET.Element) -> bool:
+    return (
+        node.get("visible-to-user", "true") == "true"
+        and node.get("enabled", "true") == "true"
+    )
+
+
+def _node_labels(node: ET.Element) -> tuple[str, str]:
+    return node.get("text", "").strip(), node.get("content-desc", "").strip()
+
+
+def _matches_target(node: ET.Element, target: str) -> bool:
+    target = target.strip()
+    if not target:
+        return False
+
+    for label in _node_labels(node):
+        if label.casefold() == target.casefold():
+            return True
+
+        # 兼容“颜色 黑色，已选中”或“尺码: XL”等无障碍描述，
+        # 同时避免 XL 错误匹配到 2XL。
+        pattern = rf"(?:^|[\s,，:：;；]){re.escape(target)}(?:$|[\s,，:：;；])"
+        if re.search(pattern, label, flags=re.IGNORECASE):
+            return True
+    return False
+
+
+def _parent_map(root: ET.Element) -> dict[ET.Element, ET.Element]:
+    return {
+        child: parent
+        for parent in root.iter()
+        for child in parent
+        if child.tag == "node"
+    }
+
+
+def _center_in(bounds: Bounds, region: Bounds) -> bool:
+    x = (bounds[0] + bounds[2]) // 2
+    y = (bounds[1] + bounds[3]) // 2
+    return region[0] <= x <= region[2] and region[1] <= y <= region[3]
+
+
+def _intersection_area(first: Bounds, second: Bounds) -> int:
+    width = max(0, min(first[2], second[2]) - max(first[0], second[0]))
+    height = max(0, min(first[3], second[3]) - max(first[1], second[1]))
+    return width * height
+
+
+def _screen_bounds(root: ET.Element) -> Optional[Bounds]:
+    bounds = [
+        item
+        for node in root.iter("node")
+        if (item := _parse_bounds(node.get("bounds", ""))) is not None
+    ]
+    if not bounds:
+        return None
+    return 0, 0, max(item[2] for item in bounds), max(item[3] for item in bounds)
+
+
+def _heading_bounds(root: ET.Element) -> Optional[Bounds]:
+    fuzzy_match: Optional[Bounds] = None
+    for node in root.iter("node"):
+        text = node.get("text", "").strip()
+        bounds = _parse_bounds(node.get("bounds", ""))
+        if bounds is None or not _is_available(node):
+            continue
+
+        # “请选择：颜色分类 尺码”等摘要不能当成颜色列表标题。
+        if text == "颜色分类":
+            return bounds
+        if fuzzy_match is None and any(heading in text for heading in _COLOR_HEADINGS):
+            fuzzy_match = bounds
+    return fuzzy_match
+
+
+def _target_scrollable_ancestor(
+    root: ET.Element,
+    target: str,
+) -> Optional[Bounds]:
+    """目标已在控件树时，直接使用它最近的可滚动祖先。"""
+    parents = _parent_map(root)
+    for node in root.iter("node"):
+        if not _matches_target(node, target):
+            continue
+
+        current = parents.get(node)
+        while current is not None:
+            if current.get("scrollable") == "true" and _is_available(current):
+                bounds = _parse_bounds(current.get("bounds", ""))
+                if bounds is not None:
+                    return bounds
+            current = parents.get(current)
+    return None
+
+
+def _horizontal_color_region(
+    root: ET.Element,
+    target: Optional[str] = None,
+) -> Optional[Bounds]:
+    if target:
+        target_region = _target_scrollable_ancestor(root, target)
+        if target_region is not None:
+            return target_region
+
+    heading = _heading_bounds(root)
+    candidates: list[tuple[float, Bounds]] = []
+    screen = _screen_bounds(root)
+
+    for node in root.iter("node"):
+        if node.get("scrollable") != "true" or not _is_available(node):
+            continue
+
+        bounds = _parse_bounds(node.get("bounds", ""))
+        if bounds is None:
+            continue
+
+        width = bounds[2] - bounds[0]
+        height = bounds[3] - bounds[1]
+
+        if heading is not None and screen is not None:
+            distance_below_heading = bounds[1] - heading[3]
+            if (
+                -10 <= distance_below_heading <= int(screen[3] * 0.20)
+                and width >= screen[2] * 0.60
+            ):
+                # 图片颜色可能是两行网格，高度较大，不能依赖宽高比。
+                score = 100_000.0 - distance_below_heading - width * height / 1_000_000
+                candidates.append((score, bounds))
+                continue
+
+        if width >= height * 1.4:
+            candidates.append((width / height, bounds))
+
+    if candidates:
+        return max(candidates, key=lambda item: item[0])[1]
+
+    # 部分自绘横向列表不会暴露 scrollable，使用颜色标题下方区域兜底。
+    if heading is None or screen is None:
+        return None
+
+    top = heading[3]
+    bottom = min(screen[3], top + max(160, int(screen[3] * 0.14)))
+    if bottom <= top:
+        return None
+    return int(screen[2] * 0.04), top, int(screen[2] * 0.96), bottom
+
+
+def _vertical_panel_region(root: ET.Element) -> Optional[Bounds]:
+    heading = _heading_bounds(root)
+    vertical: list[tuple[float, Bounds]] = []
+
+    for node in root.iter("node"):
+        if node.get("scrollable") != "true" or not _is_available(node):
+            continue
+
+        bounds = _parse_bounds(node.get("bounds", ""))
+        if bounds is None:
+            continue
+
+        width = bounds[2] - bounds[0]
+        height = bounds[3] - bounds[1]
+        if height < width * 0.60:
+            continue
+
+        if heading is not None and _center_in(heading, bounds):
+            # 优先颜色标题所在的最内层纵向滚动容器。
+            score = 10_000_000 - width * height
+        else:
+            # 弹出的规格面板通常比背后的商品页起点更靠下。
+            score = bounds[1] * 1000 + width * height / 1_000_000
+        vertical.append((score, bounds))
+
+    if vertical:
+        return max(vertical, key=lambda item: item[0])[1]
+
+    screen = _screen_bounds(root)
+    if screen is None:
+        return None
+    return (
+        int(screen[2] * 0.06),
+        int(screen[3] * 0.22),
+        int(screen[2] * 0.94),
+        int(screen[3] * 0.82),
+    )
+
+
+def _nearest_click_bounds(
+    node: ET.Element,
+    parents: dict[ET.Element, ET.Element],
+    region: Bounds,
+) -> Optional[Bounds]:
+    node_bounds = _parse_bounds(node.get("bounds", ""))
+    if node_bounds is None or not _center_in(node_bounds, region):
+        return None
+
+    node_area = max(
+        1,
+        (node_bounds[2] - node_bounds[0]) * (node_bounds[3] - node_bounds[1]),
+    )
+    current: Optional[ET.Element] = node
+    clickable_bounds: list[tuple[int, Bounds]] = []
+
+    while current is not None:
+        bounds = _parse_bounds(current.get("bounds", ""))
+        if bounds is None or not _center_in(bounds, region):
+            break
+
+        area = (bounds[2] - bounds[0]) * (bounds[3] - bounds[1])
+        if (
+            current.get("clickable") == "true"
+            and _is_available(current)
+            and area <= node_area * 15
+        ):
+            clickable_bounds.append((area, bounds))
+        current = parents.get(current)
+
+    if clickable_bounds:
+        # 规格文字和外层卡片可能都 clickable，优先点击完整卡片。
+        return max(clickable_bounds, key=lambda item: item[0])[1]
+
+    # 自绘规格经常没有 clickable 属性，点击文字节点中心作为兜底。
+    return node_bounds
+
+
+def _safe_horizontal_target(bounds: Bounds, region: Bounds) -> bool:
+    """排除只在横向列表左右边缘露出一小部分的规格卡片。"""
+    region_width = region[2] - region[0]
+    target_width = bounds[2] - bounds[0]
+    center_x = (bounds[0] + bounds[2]) // 2
+    safe_margin = max(30, int(region_width * 0.08))
+    min_width = max(48, int(region_width * 0.08))
+    return (
+        target_width >= min_width
+        and region[0] + safe_margin <= center_x <= region[2] - safe_margin
+        and _intersection_area(bounds, region)
+        == (bounds[2] - bounds[0]) * (bounds[3] - bounds[1])
+    )
+
+
+def _target_click_bounds(
+    root: ET.Element,
+    target: str,
+    region: Bounds,
+    require_horizontal_safe: bool = False,
+) -> Optional[Bounds]:
+    parents = _parent_map(root)
+    candidates: list[tuple[int, Bounds]] = []
+
+    for node in root.iter("node"):
+        if not _is_available(node) or not _matches_target(node, target):
+            continue
+
+        bounds = _nearest_click_bounds(node, parents, region)
+        if bounds is None:
+            continue
+        if require_horizontal_safe and not _safe_horizontal_target(bounds, region):
+            continue
+
+        area = (bounds[2] - bounds[0]) * (bounds[3] - bounds[1])
+        candidates.append((area, bounds))
+
+    if not candidates:
+        return None
+    return max(candidates, key=lambda item: item[0])[1]
+
+
+def _target_is_selected(root: ET.Element, target: str) -> bool:
+    """检查目标节点、祖先或“已选”摘要是否确认了选中状态。"""
+    parents = _parent_map(root)
+
+    for node in root.iter("node"):
+        if not _matches_target(node, target):
+            continue
+
+        text, description = _node_labels(node)
+        label = f"{text} {description}"
+        if "已选" in label or "选中" in label:
+            return True
+
+        current: Optional[ET.Element] = node
+        while current is not None:
+            if (
+                current.get("selected") == "true"
+                or current.get("checked") == "true"
+            ):
+                return True
+            current = parents.get(current)
+    return False
+
+
+def _visible_signature(
+    root: ET.Element,
+    region: Bounds,
+) -> tuple[tuple[str, str, Bounds], ...]:
+    """记录当前区域可见文本和坐标，用来判断是否到达滚动边界。"""
+    result: list[tuple[str, str, Bounds]] = []
+    for node in root.iter("node"):
+        bounds = _parse_bounds(node.get("bounds", ""))
+        if bounds is None or not _is_available(node) or not _center_in(bounds, region):
+            continue
+
+        text, description = _node_labels(node)
+        if text or description:
+            result.append((text, description, bounds))
+    return tuple(result)
+
+
+def _click_target_and_verify(
+    device: Any,
+    root: ET.Element,
+    target: str,
+    region: Bounds,
+    action_delay: float,
+    require_horizontal_safe: bool = False,
+) -> tuple[bool, ET.Element]:
+    if _target_is_selected(root, target):
+        return True, root
+
+    bounds = _target_click_bounds(
+        root,
+        target,
+        region,
+        require_horizontal_safe=require_horizontal_safe,
+    )
+    if bounds is None:
+        return False, root
+
+    x = (bounds[0] + bounds[2]) // 2
+    y = (bounds[1] + bounds[3]) // 2
+    device.click(x, y)
+    time.sleep(action_delay)
+
+    refreshed_root = _parse_xml(device.dump_hierarchy())
+    return _target_is_selected(refreshed_root, target), refreshed_root
+
+
+def _color_swipe_y(root: ET.Element, region: Bounds) -> int:
+    """选择最靠近容器中部的实际颜色行中心，避免在两行间隙滑动。"""
+    region_center_y = (region[1] + region[3]) // 2
+
+    for node in root.iter("node"):
+        if (
+            node.get("scrollable") != "true"
+            or _parse_bounds(node.get("bounds", "")) != region
+        ):
+            continue
+
+        row_centers: list[int] = []
+        for child in node:
+            bounds = _parse_bounds(child.get("bounds", ""))
+            if bounds is None or not _is_available(child):
+                continue
+            if child.get("clickable") == "true" or child.get("content-desc", ""):
+                row_centers.append((bounds[1] + bounds[3]) // 2)
+
+        if row_centers:
+            return min(row_centers, key=lambda y: abs(y - region_center_y))
+
+    return region_center_y
+
+
+def _swipe_color_row(
+    device: Any,
+    root: ET.Element,
+    region: Bounds,
+    finger_right: bool,
+) -> None:
+    left, top, right, bottom = region
+    width = right - left
+    y = _color_swipe_y(root, region)
+    # 每次移动约 40% 宽度，避免一次跨过只短暂出现的颜色卡片。
+    start_x = left + int(width * (0.30 if finger_right else 0.70))
+    end_x = left + int(width * (0.70 if finger_right else 0.30))
+    device.swipe(start_x, y, end_x, y, duration=0.4)
+
+
+def _swipe_panel_down(device: Any, region: Bounds) -> None:
+    left, top, right, bottom = region
+    height = bottom - top
+    x = (left + right) // 2
+    # 手指向上滑，规格内容向下滚动。
+    device.swipe(
+        x,
+        top + int(height * 0.82),
+        x,
+        top + int(height * 0.25),
+        duration=0.35,
+    )
+
+
+def select_color(
+    device: Any,
+    xml_data: XmlData,
+    target_color: str,
+    max_swipes: int = 15,
+    action_delay: float = 0.5,
+) -> bool:
+    """边横向滑动边刷新 XML，目标颜色充分可见后点击并验证选中。"""
+    if not target_color.strip():
+        raise ValueError("target_color 不能为空")
+
+    root = _parse_xml(xml_data)
+    region = _horizontal_color_region(root, target_color)
+    if region is None:
+        return False
+
+    selected, root = _click_target_and_verify(
+        device,
+        root,
+        target_color,
+        region,
+        action_delay,
+        require_horizontal_safe=True,
+    )
+    if selected:
+        return True
+    region = _horizontal_color_region(root, target_color) or region
+
+    # 当前横向位置未知：先用手指向右滑到列表左端。每次刷新 XML 时，
+    # _click_target_and_verify 都会遍历整个 RecyclerView 内的所有行。
+    previous_signature = _visible_signature(root, region)
+    unchanged_count = 0
+    for _ in range(max_swipes):
+        _swipe_color_row(device, root, region, finger_right=True)
+        time.sleep(action_delay)
+        root = _parse_xml(device.dump_hierarchy())
+        region = _horizontal_color_region(root, target_color) or region
+
+        selected, root = _click_target_and_verify(
+            device,
+            root,
+            target_color,
+            region,
+            action_delay,
+            require_horizontal_safe=True,
+        )
+        if selected:
+            return True
+        region = _horizontal_color_region(root, target_color) or region
+
+        signature = _visible_signature(root, region)
+        if signature == previous_signature:
+            unchanged_count += 1
+        else:
+            unchanged_count = 0
+        previous_signature = signature
+        if unchanged_count >= 2:
+            break
+
+    # 从左端用手指向左慢慢滑到右端；每个视口同时检查全部颜色行。
+    previous_signature = _visible_signature(root, region)
+    unchanged_count = 0
+    for _ in range(max_swipes):
+        _swipe_color_row(device, root, region, finger_right=False)
+        time.sleep(action_delay)
+        root = _parse_xml(device.dump_hierarchy())
+        region = _horizontal_color_region(root, target_color) or region
+
+        selected, root = _click_target_and_verify(
+            device,
+            root,
+            target_color,
+            region,
+            action_delay,
+            require_horizontal_safe=True,
+        )
+        if selected:
+            return True
+        region = _horizontal_color_region(root, target_color) or region
+
+        signature = _visible_signature(root, region)
+        if signature == previous_signature:
+            unchanged_count += 1
+        else:
+            unchanged_count = 0
+        previous_signature = signature
+        if unchanged_count >= 2:
+            break
+
+    return False
+
+
+def select_size(
+    device: Any,
+    xml_data: XmlData,
+    target_size: str,
+    max_swipes: int = 15,
+    action_delay: float = 0.5,
+) -> bool:
+    """边向下滚动规格面板边刷新 XML，点击目标尺码并验证选中。"""
+    if not target_size.strip():
+        raise ValueError("target_size 不能为空")
+
+    root = _parse_xml(xml_data)
+    region = _vertical_panel_region(root)
+    if region is None:
+        return False
+
+    selected, root = _click_target_and_verify(
+        device,
+        root,
+        target_size,
+        region,
+        action_delay,
+    )
+    if selected:
+        return True
+    region = _vertical_panel_region(root) or region
+
+    previous_signature = _visible_signature(root, region)
+    unchanged_count = 0
+    for _ in range(max_swipes):
+        _swipe_panel_down(device, region)
+        time.sleep(action_delay)
+        root = _parse_xml(device.dump_hierarchy())
+        region = _vertical_panel_region(root) or region
+
+        selected, root = _click_target_and_verify(
+            device,
+            root,
+            target_size,
+            region,
+            action_delay,
+        )
+        if selected:
+            return True
+        region = _vertical_panel_region(root) or region
+
+        signature = _visible_signature(root, region)
+        if signature == previous_signature:
+            unchanged_count += 1
+        else:
+            unchanged_count = 0
+        previous_signature = signature
+        if unchanged_count >= 2:
+            break
+
+    return False
+
+
+def select_color_size(
+    device: Any,
+    xml_data: XmlData,
+    target_color: str,
+    target_size: str,
+    max_horizontal_swipes: int = 15,
+    max_vertical_swipes: int = 15,
+    action_delay: float = 0.5,
+) -> bool:
+    """在已打开的拼多多规格面板中选择目标颜色和尺码。
+
+    颜色列表先归位到左端，再单向扫描同一 RecyclerView 中的所有行。
+    颜色和尺码区域每滑动一次都会重新调用 ``dump_hierarchy``，不会假设
+    最后一次 XML 包含所有历史节点。颜色点击后会丢弃旧 XML，使用最新
+    规格状态继续查找尺码。两项都确认选中时返回 True。
+    """
+    color_selected = select_color(
+        device,
+        xml_data,
+        target_color,
+        max_swipes=max_horizontal_swipes,
+        action_delay=action_delay,
+    )
+    if not color_selected:
+        return False
+
+    # 颜色可能改变尺码库存和布局，必须获取新的控件树。
+    current_xml = device.dump_hierarchy()
+    return select_size(
+        device,
+        current_xml,
+        target_size,
+        max_swipes=max_vertical_swipes,
+        action_delay=action_delay,
+    )
diff --git a/run_buy.bat b/run_buy.bat
new file mode 100644
index 0000000..1dcc53d
--- /dev/null
+++ b/run_buy.bat
@@ -0,0 +1,2 @@
+python ./client/buyer_main.py
+pause
\ No newline at end of file