body{font-size:1.2em;margin:auto;padding:20px;max-width:800px}footer{position:fixed;left:0;bottom:0;width:100%;padding:10px 0;z-index:1000}
* { margin:0; padding:0; outline:none; }
a { text-decoration:none; color:inherit; }
ul, li { list-style:none; }
body { font-family:Microsoft YaHei; }
.center { margin:0 auto; position:relative; }
.clear { clear:both; }
.nav { width:100%; height:100px; background-color:#fff; position:fixed; background:#eee; z-index:100; }
.logo { width:320px; height:100px; line-height:100px; font-size:40px; display:block; float: left; color:#000; }
.link { width:100px; height: 50px; line-height: 50px; font-size:20px; display:block; float:right; color:#000; text-align:center; margin:25px 0 0 20px; }
.link.current, .link:hover { border-bottom:2px solid #000; }
.vschess { margin:0 auto; }