两者之间有什么区别current_page_item 和current-menu-item 使用自定义菜单时

.current_page_item{} // Class for Current Page
.current-cat{} // Class for Current Category
.current-menu-item{} // Class for any other current Menu Item
.menu-item-type-taxonomy{} // Class for a Category
.menu-item-type-post_type{} // Class for Pages
.menu-item-type-custom{} // Class for any custom item that you added
.menu-item-home{} // Class for the Home Link