demo.css
@charset "UTF-8";
html{font-size:62.5%;font-family:'helvetica neue',tahoma,arial,'hiragino sans gb','Simsun',sans-serif}
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,button,textarea,p,blockquote,th,td,hr{margin:0;padding:0}
body{line-height:1.333;font-size:12px}
h1,h2,h3,h4,h5,h6{font-size:100%;font-family:arial,'hiragino sans gb','microsoft yahei','Simsun',sans-serif}
li{list-style:none}
a:link,a:visited{text-decoration:none}
.head-v3{position:relative;z-index:100;min-width:1000px}
.head-v3 .navigation-inner{margin:0 auto;width:980px;position:relative}
.navigation-up{height:60px;background:#27303f}
.navigation-up .navigation-v3{margin-left:155px;float:left;_margin-left:10px}
.navigation-up .navigation-v3 ul{float:left}
.navigation-up .navigation-v3 li{float:left;font:normal 16px/59px "microsoft yahei";color:#fff}
.navigation-up .navigation-v3 .nav-up-selected{background:#344157}
.navigation-up .navigation-v3 .nav-up-selected-inpage{background:#202833}
.navigation-up .navigation-v3 li h2{font-weight:normal;padding:0;margin:0}
.navigation-up .navigation-v3 li h2 a{padding:0 25px;color:#fff;display:inline-block;height:60px;font-family:"microsoft yahei"}
.navigation-down{position:absolute;top:60px;left:0px;width:100%}
.navigation-down .nav-down-menu{width:100%;margin:0;background:#344157;position:absolute;top:0px}
.navigation-down .nav-down-menu .navigation-down-inner{margin:auto;width:1200px;position:relative}
.navigation-down .nav-down-menu dl{float:left;margin:18px 80px 18px 0}
.navigation-down .menu-1 dl{margin:20px 80px 25px 0}
.navigation-down .menu-1 dt{font:normal 16px "microsoft yahei";color:#61789e;padding-bottom:10px;border-bottom:1px solid #61789e;margin-bottom:10px}
.navigation-down .menu-1 dd a{color:#fff;font:normal 14px/30px "microsoft yahei"}
.navigation-down .menu-1 dd a:hover{color:#60aff6}
.navigation-down .menu-2 dd a,.navigation-down .menu-3 dd a{color:#fff;font:normal 16px "microsoft yahei"}