这个文件将所有的CSS文件合并到一起，减少了并发连接数。
一共包含了以下几个CSS
/* reset.css */
/* typography.css */
/* forms.css */
/* grid.css */
此外，如果是IE8以下版本则包含/* ie.css */
作者的注释已经很清晰了，代码也很清晰。跟着我一起理解一遍即可。
CSS代码
/* --------------------------------------------------------------
reset.css
* Resets default browser CSS.
-------------------------------------------------------------- */
/*原文作者注释已经很清晰了*/
html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, code,
del, dfn, em, img, q, dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
margin: 0;
padding: 0;
border: 0;
font-weight: inherit;
font-style: inherit;
font-size: 100%;
font-family: inherit;
vertical-align: baselinebaseline;
}
/*行高1.5，也就是150%,刚看了淘宝UED的碳酸饮料会杂志，上面有介绍*/
body {
line-height: 1.5;
}
/* Tables still need 'cellspacing="0"' in the markup. */
table { border-collapse: separate; border-spacing: 0; }
caption, th, td { text-align: left; font-weight: normal; }
/*垂直居中*/
table, td, th { vertical-align: middle; }
/* Remove possible quote marks (") from ,
. */
blockquote:before, blockquote:after, q:before, q:after { content: ""; }
blockquote, q { quotes: "" ""; }
/* 链接内加图片，会有一个难看的border */
a img { border: none; }
CSS代码
/* --------------------------------------------------------------
typography.css
* Sets up some sensible default typography.
typography == 文字排版
-------------------------------------------------------------- */
/* Default font settings.
The font-size percentage is of 16px. (0.75 * 16px = 12px) 默认12像素
*/
body {
font-size: 75%;
color: #222;
background: #fff;
font-family: "Helvetica Neue", Arial, Helvetica, sans-serif;
}
/* Headings
-------------------------------------------------------------- */
/*不加粗,非纯黑(将更美观)*/
h1,h2,h3,h4,h5,h6 { font-weight: normal; color: #111; }
h1 { font-size: 3em; line-height: 1; margin-bottom: 0.5em; }
h2 { font-size: 2em; margin-bottom: 0.75em; }
h3 { font-size: 1.5em; line-height: 1; margin-bottom: 1em; }
h4 { font-size: 1.2em; line-height: 1.25; margin-bottom: 1.25em; }
/*H5 H6的字体和正文已经一样了，所以要加粗*/
h5 { font-size: 1em; font-weight: bold; margin-bottom: 1.5em; }
h6 { font-size: 1em; font-weight: bold; }
h1 img, h2 img, h3 img,
h4 img, h5 img, h6 img {
margin: 0;
}
/* Text elements
-------------------------------------------------------------- */
p { margin: 0 0 1.5em; }
p img.left { float: left; margin: 1.5em 1.5em 1.5em 0; padding: 0; }
p img.rightright { float: rightright; margin: 1.5em 0 1.5em 1.5em; }
a:focus,
a:hover { color: #000; }
a { color: #009; text-decoration: underline; }
blockquote { margin: 1.5em; color: #666; font-style: italic; }
strong { font-weight: bold; }
em,dfn { font-style: italic; }
dfn { font-weight: bold; }
sup, sub { line-height: 0; }
abbr,
acronym { border-bottom: 1px dotted #666; }
address { margin: 0 0 1.5em; font-style: italic; }
del { color:#666; }
pre { margin: 1.5em 0; whitewhite-space: pre; }
/*代码用等宽字体*/
pre,code,tt { font: 1em 'andale mono', 'lucida console', monospace; line-height: 1.5; }
/* Lists
-----------------------------------------------------------