应用: 淘宝
任务: 在淘宝分类中查找并购买一个新款背包，颜色为黑色。
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: TYPE
type_text: 新款背包
step_id: 3
action: CLICK
step_id: 4
action: CLICK
step_id: 5
action: CLICK
step_id: 6
action: CLICK
step_id: 7
action: CLICK