这嵌套循环是问题吗？一直显示if哪里是无效语法

#模拟银行卡取款
card1='1001'
pwd1='123456'
ban1=1600

card2='1002'
pwd2='123456'
ban2=500

card3='1003'
pwd3='123456'
ban3=10000

card4='1004'
pwd4='123456'
ban4=1000054        
print('欢迎来到Python银行！')
times=1
while True:
    card=input("请输入银行卡号！")
    pwd=input('请输入密码！')
    ban=0    #余额
    if card==card1 and pwd==pwd1:
         ban=ban1
    elif card==card2 and pwd==pwd2:
         ban=ban2
    elif card==card3 and pwd==pwd3:
         ban=ban3
    else:
         times=times+1
         if times>=3:
             print('三次输入错误，请您联系柜台！')
             break
         else:
                print('卡号密码错误！请重新输入')
    continue

    while True:
        num=input('请输入要办理的业务：1.存款 2.取款 3.退卡')
        if     num=='1':
             inn=float(input('请输入存款金额：'))
             if inn<=0:
                 print('存款金额请大于0！')
             else:
                 ban=ban+inn
                 print('存款成功！存入',inn,'余额',ban,)
        elif num=='2':
             out=float(input('请输入取款金额:')
            if out>ban:
                 print('余额不足！')
                continue
            else:
                 ban=ban-out
                 print('取款成功！取出：',out,'余额：',ban)
        elif num=='3':
             print('请收好卡片，欢迎下次再来！')
             break
         else:
             print('输入有误！')
             continue