如何在保留单词case的同时从列表中删除重复项？

def remove_duplicates_with_case(items):
    new_list = []
    seen = set()  # 用于存储已经遇到的元素

    for item in items:
        item_lower = item.lower()  # 转换为小写形式
        if item_lower not in seen:
            new_list.append(item)  # 添加到新列表中
            seen.add(item_lower)  # 添加到已遇到元素集合中

    return new_list

original_list = ["Apple", "banana", "apple", "Orange", "banana", "grape"]
new_list = remove_duplicates_with_case(original_list)
print(new_list)

['Apple', 'banana', 'Orange', 'grape']