css结构

翻译过一篇：提高css的可读性 http://xo-tobacoo.iteye.com/blog/190498

贴个例子，和我们管理管理java文档有异曲同工之妙：

 

html, body, div, p, ul, ol, li, form, fieldset, h1, h2, h3, h4, h5, h6, address   { margin: 0; padding: 0; list-style: none; }

html            { background: #000 url('../images/bg-html.gif') repeat-x; }
body		        { font: normal 62.8%/1.3 Tahoma, "Lucida Grande CE", lucida, sans-serif; color: #64030a; padding-bottom: 50px; background: url('../images/bg-body.jpg') 20% 0 no-repeat; }
a			          { color: #660306; }
a:hover	        { color: #c61116; text-decoration: underline !important; }
a img   	      { border:0; }
input,
select,
textarea        { font-family: lucida, sans-serif; font-size: 1em; vertical-align: middle; }
input.button,
select.button,
textarea.button { background: #fff; padding: 2px 0; border: none; color: #000 !important; }
button.button   { margin: 0; padding: 0; height: 18px; border: none; text-decoration: underline; font-weight: bold; color: #00CCFF; cursor: pointer; }
input.submit    { width: 87px !important; height: 22px; overflow: visible; padding: 0 5px; color: #fff; font-weight: bold; border: none; cursor: pointer; }
label           { cursor: pointer; padding-right: 5px; line-height: 20px; }

h1	{ font-size: 2em; margin-bottom: .5em; }
h2	{ font-size: 1.7em; }
h3	{ font-size: 1.5em; }
h4	{ font-size: 1.3em; }
h5	{ font-size: 1.2em; }
h6	{ font-size: 1em; }

h1, h2, h3, h4, h5, h6  { color: #c61116; }

table           { border-collapse: collapse; width: 100%; }
table th        { text-align: left; }
table td.right  { padding-left: 5px; }
table th.right  { padding-left: 5px; }
table td.left   { padding-right: 5px; }
table th.left   { padding-right: 5px; }

blockquote  { margin: 0; padding: 10px 20px; color: #333333; line-height: 1.6; font-family: Georgia, serif; }
fieldset    { border: 0 !important; }

/* -- User friendly features --*/
.hidden { display: none; }
.noscreen { width: 200px; position: absolute; left: -9999px; top: -9999px; }

/* -- Basics layout -- */
#view     { position: relative; }
#head     { font-size: 1.2em; position: relative; z-index: 10; }
#content  { font-size: 1.3em; position: relative; z-index: 1; }
#menu     { font-size: 1.2em; }
#foot     { font-size: 1.2em; position: relative; z-index: 1; }

/* -- Main classes -- */
.fr		     { float: right !important; }
.fl		     { float: left !important; }
.clear     { clear: both !important; }
.right	   { text-align: right !important; }
.left		   { text-align: left !important; }
.center	   { text-align: center !important; }
.last		   { margin-right: 0 !important; margin-bottom: 0 !important; border-bottom: none !important; padding-bottom: 0 !important; background: none; }
.small	   { font-size: .90em; }
.big       { font-size: 1.2em; }
.biggest   { font-size: 2.3em; }
.light     { color: #999999 !important; }
.alt       { font-weight: bold; }

/* -- Main icons -- */
.ico	            { position: relative; padding-right: 30px; height: 20px; padding-bottom: 2px; vertical-align: middle; background: 100% 0 no-repeat; }
.ico-more        	{ background-image: url('../images/ico/ico-more.gif'); }

/* -- Forms layout -- */
.formBox .lab			      { float: left; width: 19%; text-align: right; padding-right: 1%; }
.formBox .con			      { float: right; width: 80%; }
.formBox .button:focus  { border-color: #000; }

/* -- Layout -- */
#view         { width: 954px; margin: 0 auto; padding: 0 5px; background: url('../images/bg-shadow.png') 0 77px no-repeat; }
#head         { height: 167px; }
#menu         { position: absolute; top: 83px; left: 5px; z-index: 100; width: 954px; height: 84px; overflow: hidden; background: #181502 url('../images/bg-menu.gif') no-repeat; }
#content      { padding: 25px 29px 40px 26px; margin-bottom: 3px; overflow: hidden; background-color: #fff; }
#foot         { height: 51px; padding: 12px 25px 0; background: #2b0b00 url('../images/bg-footer.gif') repeat-x; clear: both; }

  .subheader { margin-bottom: 24px; padding-left: 5px; font-weight: normal; font-family: Georgia, "New York CE", utopia, serif; }
  #printPage { position: absolute; right: 25px; top: 25px; }

  /* Header */
  #logotype     { float: left; display: block; padding: 18px 12px; font-size: 3em; font-weight: normal; font-family: Georgia, "New York CE", utopia, serif; }
  #logotype,
  #logotype *   { color: #fefea2; text-decoration: none !important; }

  /* Search Form */
  #searchForm         { position: absolute; top: 0; right: 0; width: 300px; text-align: right; padding: 28px 1px; font-size: 1.1em; }
  #searchForm .button { width: 180px; height: 17px; padding: 5px 10px; margin-right: 5px; }
  #searchForm .submit { width: 87px !important; height: 29px; background: #c40000 url('../images/bg-search-submit.gif') no-repeat; }
  
  /* Menus */
  #mainMenu             { position: absolute; top: 42px; left: 0; height: 42px; padding: 0 28px; }
  #mainMenu li          { font-size: 1.5em; margin-right: 2px; float: left; }
  #mainMenu li a,
  #mainMenu li strong   { display: block; width: 145px; height: 42px; float: left; padding-top: 10px; text-align: center; color: #fefea2; text-decoration: none !important; font-family: Georgia, "New York CE", utopia, serif; background: url('../images/bg-menu-item.gif') 0 0 no-repeat; }
  #mainMenu li strong   { color: #c61116; font-weight: normal; background: #fff url('../images/bg-menu-item.gif') 0 -42px no-repeat; }
  #mainMenu li a:hover  { text-decoration: underline !important; }

  #subMenu              { position: absolute; top: 0; right: 0; padding: 17px 26px; }
  #subMenu li           { display: inline; margin-left: 8px; }
  #subMenu li a         { color: #fffec5; }

  /* Right sidebox */
  #rightBlock                           { width: 274px; float: right; padding: 35px 0; }
  #rightBlock .box                      { position: relative; margin-bottom: 30px; }

  #rightBlock .submenu                  { margin-bottom: 50px; }
  #rightBlock .submenu .in              { background: url('../images/bg-submenu_top.gif') no-repeat; }
  #rightBlock .submenu .in ul           { padding: 1px 3px 1px 1px; font-size: 1.1em; background: url('../images/bg-submenu_bottom.gif') 0 100% no-repeat; }
  #rightBlock .submenu .in ul li a,
  #rightBlock .submenu .in ul li strong { display: block; height: 32px; padding: 12px 5px 0 30px; background: url('../images/bg-submenu-item.gif') 0 0 no-repeat; }
  #rightBlock .submenu .in ul li strong { color: #9c3134; background: #fffed5 url('../images/bg-submenu-item.gif') 0 -44px no-repeat; }

  #rightBlock .contact .in              { padding: 30px 15px; height: 161px; background: #1f1b02 url('../images/bg-contact.gif') no-repeat; }
  #rightBlock .contact .in *            { color: #fffed5; }
  #rightBlock .contact .in address      { font-style: normal; margin-top: 20px; }
  #rightBlock .contact .in .phone       { color: #fff; }
  #rightBlock .contact .in .more        { position: absolute; bottom: 20px; right: 15px; }

  #rightBlock .rss a                    { display: block; height: 40px; color: #fffed5; padding: 20px 0 0 64px; text-decoration: none; background: #b65c02 url('../images/bg-rss.gif') no-repeat; }
  #rightBlock .rss a strong             { text-decoration: underline; }
  
  /* Left content part */
  #contentBlock             { width: 610px; float: left; padding: 25px 0; }
  #contentBlock .subheader  { margin-bottom: 20px !important; }

  /* Article items */
  #contentBlock .item                 { position: relative; width: 554px; padding: 20px 28px 0; margin-bottom: 10px; line-height: 1.4em; }
  #contentBlock .first                { background: url('../images/bg-item_first.jpg') no-repeat; }
  #contentBlock .item .subheader      { margin-bottom: 25px !important; padding: 0; }
  #contentBlock .item .date           { position: absolute; top: 16px; right: 16px; width: 80px; height: 23px; text-align: center; font-size: 1.4em; color: #fff; padding-top: 6px; background: url('../images/bg-item_date.png') no-repeat; }
  #contentBlock .item .in             { overflow: hidden; padding-bottom: 35px; background: url('../images/bg-item_separator.gif') 50% 100% no-repeat; }
  #contentBlock .last .in             { background: none !important; }
  #contentBlock .item .in img,
  #contentBlock .item .in a img       { border: 3px #d4a65d solid; }
  #contentBlock .item .in a:hover img { border-color: #a8803f; }
  #contentBlock .item .in img         { margin: 2px 6px 15px 0; }
  #contentBlock .item .in img.left    { float: left; margin: 2px 15px 10px 0; }
  #contentBlock .item .in img.right   { float: right; margin: 2px 0 10px 15px; }

  #contentBlock .item .in ul,
  #contentBlock .item .in ol,
  #contentBlock .item .in p,
  #contentBlock .item .in table       { margin-bottom: 2em; }

  #contentBlock .item .in ul          { padding-left: 20px; }
  #contentBlock .item .in ol          { padding-left: 35px; }
  #contentBlock .item .in ol li       { list-style: decimal !important; }
  #contentBlock .item .in ul li       { margin: 3px 0; padding-left: 15px; background: url('../images/bg-inlink.gif') 0 .4em no-repeat; }

  #contentBlock .item .in table td,
  #contentBlock .item .in table th    { padding: 5px 10px; border: 1px #660306 solid; }
  #contentBlock .item .in table th    { background-color: #660306; color: #fff; }

  /* Footer */
  #foot *                       { color: #fffec5; }
  #foot .menu                   { padding-bottom: 20px; }
  #foot .menu li                { display: inline; margin-right: 16px; float: left; }
  #foot p.copy                  { float: left; clear: left; width: 48%; }
  #foot .support                { position: absolute; top: 12px; right: 25px; width: 200px; text-align: right; }
  #foot .support .hotmix        { margin-top: 4px; float: right; }
  #foot .support .hotmix a      { position: relative; width: 55px; height: 13px; float: left; display: block; margin: 2px 0 0 5px; overflow: hidden; cursor: pointer; }
  #foot .support .hotmix a span { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: url('../images/bg-hotmix.gif') 0 0 no-repeat; }
  #foot .support .lt            { position: relative; display: block; clear: both; float: right; right: -25px; top: 20px; }
  #foot .support .lt a          { position: relative; width: 14px; height: 14px; display: block; overflow: hidden; cursor: pointer; }
  #foot .support .lt a span     { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: url('../images/bg-lt.gif') 0 0 no-repeat; }
  #foot a:hover                 { color: #fff !important; }