body {background-size: 100%;background: #ffffff;}.header .logosos .sos .btn {background: url(/seac/xhtml/images/public/sosearch.png) left top !important; color: #015293 !important; font-size: 15px; font-weight: bold;}@media screen and (min-width:960px) {body {width: 100%;z-index: 0;}.header {width: 100%;overflow: hidden;background: #ffffff;margin: 0px auto 0px auto;}.header .logosos { margin: 35px auto 10px auto;}.w1140 {width: 1130px;margin: 0 auto;overflow: hidden;}.w1150 {width: 1110px;margin: 0 auto;overflow: hidden;}.header_nav { width: 100%; height: 50px; background: #ffffff !important;}.header_nav .nav { margin-left: 2px;}.header_nav .nav li { font-size: 20px; font-weight: 600; width: 161px !important;}.header_nav .nav li:hover {background: url(https://www.neac.gov.cn/seac/xhtml/images/public/nav-bg.png) top center no-repeat;}.header_nav .nav li a:hover { color: #ffffff !important;}.header_nav .nav li a { display: inline-block; width: 161px; text-align: center; color: #015293 !important; height: 40px; margin-top: 5px; line-height: 40px; border-right:none !important;}.header_nav .nav li.index a { border-left: none !important;}.header_nav .nav li.active { background: url(https://www.neac.gov.cn/seac/xhtml/images/public/nav-bg.png) top center no-repeat !important; font-weight: bold; margin-left: -1px;}.header_nav .nav li.active a{ color: #ffffff !important;}}