.relative{position: relative;}
.absolute{ position: absolute;}
.bg-000{background:#000;}
.bg-light{background:#6c757d;}
.color-fff{color:#fff!important;}
.border-radius-0{border-radius:0!important;}
.left-0{left:0;}
.top-0{top:0;}
.right-0{right:0;}
.bottom-0{bottom:0;}
.overflow{overflow: hidden;}
.opacity-50{opacity:0.5;}
.opacity-75{opacity:0.75;}
.hide{display: none;}
.showAndHide div{display: none;}
.showAndHide:hover div{display: block;}
.pt-9{padding-top:9em;}
.pb-8{padding-bottom:8em;}
.w-24{width:24%;}
.w-20{width:20%;}
.text-indent{text-indent: 2em}
.f-12{font-size:12px;}

/***************index product****************/
.youshiBg{background:#f8f8f8;}
.aboutBg{background:url("../images/aboutBg.png") repeat-y top center; }
/*****导航******/
.navbar-nav > li:hover .dropdown-menu {display: block;}