@charset "utf-8"; 

/* 清除内外边距 */
body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, fieldset, lengend, button, input, textarea, th, td {
	margin: 0;
	padding: 0;
   _background-image:url(about:blank);
   _background-attachment:fixed;
}