As an inline style, it displays normally in Firefox and IE6; as an external style, it displays normally in Firefox, but IE6 does not introduce CSS HTML content. _html/css_WEB-ITnose

The web page I am working on now is introduced into HTML as external CSS. Firefox can parse it normally, but most of IE6 cannot parse CSS. When previewing, the original HTML file is displayed; and when I add external CSS When the CSS is placed in