/*数学特色*/

.header{ height:120px; border-top:#006f9f solid 3px;}
.logo{ float:left; padding:17px 0}
.logo img{ width:80%;}

.nav{ float:right;}
.nav ul{}
.nav li{ float:left; margin-top:40px;}
.nav li a{ font-size:16px; margin:0 10px; color:#333; display:block; padding:0 25px; line-height:40px;}
.nav li a:hover{ background-color:#006f9f; color:#fff; text-decoration:none;transition: all 0.5s;}
.nav li .hover{ background-color:#006f9f; color:#fff; text-decoration:none;}

.banner{}
.banner img{ width:100%}


/*版权*/
.copyright{background:url(../images/copyright.jpg) repeat; height:285px;}
.copyright .copyright-logo{margin-top:64px; border-right:#fff solid 1px; width:267px; height:159px;}
.copyright .copyright-nav{margin-top:85px; margin-left:40px;}
.copyright .copyright-nav h3{color:#fff; padding-bottom:10px; font-size:15px;}
.copyright .copyright-nav h3 a{color:#fff;}
.copyright .copyright-nav p{color:#fff;}
.copyright .copyright-wx{margin-top:95px;}
.copyright .copyright-wx span{float:left; margin-left:10px;}
.copyright .copyright-wx span h3{color:#fff; font-size:12px; text-align:center; padding:5px 0;}
.sohu-content{width:1200px;margin:0 auto;padding: 50px 0px;}

/**/
.yingyu{}
.yingyu .yingyu-title{ font-size:25px; font-weight:bold; color:#006f9f; padding:30px 0;}
.yingyu .yingyu-about{ padding:30px 0;}
.yingyu .yingyu-about span{ width:40%; float:left; margin-right:5%;}
.yingyu .yingyu-about span img{ width:100%;}
.yingyu .yingyu-about p{ line-height:1.8;}

.yingyu-content{ padding-bottom:40px;}
.yingyu-content .content{ padding-top:40px;}
.yingyu-content .content li{ width:25%; float:left; background-color:#fff; min-height:250px; padding-bottom:30px; border:#f9f9f9 solid 5px; margin:0 0;}
.yingyu-content .content li h3{ padding:30px 0; color:#006f9f; font-size:18px; font-weight:bold;}
.yingyu-content .content li a:hover{ color:#333; text-decoration:none;}
.yingyu-content .content li p{ line-height:1.8; padding:0 20px; color:#666;display: -webkit-box;-webkit-box-orient: vertical;-webkit-line-clamp:3;overflow: hidden;}
.yingyu-content .content li span{ width:90%; display:block; margin:0 auto; overflow:hidden; padding:10px 0;}
.yingyu-content .content li span img{ width:100%}

.gray{ background-color:#f9f9f9;}

/*内页*/

.changyou{ padding:0 0  0 0;}
.changyou-jieshao{ padding:30px 0;}
.changyou-jieshao h3{ font-size:25px; font-weight:bold; color:#006f9f; padding-bottom:5px;}
.changyou-jieshao p{ line-height:2; color:#666;}

.changyou-content{ background-color:#f9f9f9; padding:30px 0;}
.changyou-content span{ width:30%; display:block; margin:0 10px; margin-bottom:20px; float:left;}
.changyou-content span img{ width:100%;}

.tingyu-nav{ text-align:center; padding:30px 0;}
.tingyu-nav li{ width:120px; display:inline-table; margin:0 10px;}
.tingyu-nav li a{ color:#333; line-height:40px; border:#eee solid 1px; text-align:center; display:block;}
.tingyu-nav li a:hover{ background-color:#006f9f; color:#fff; text-decoration:none;}
.tingyu-nav li .hover{ background-color:#006f9f; color:#fff; text-decoration:none;}

@media (max-width: 720px){
.header{ height:auto;}
.logo{ margin:0 auto; float:none; width:18%;}
.logo img{ width:100%}

.nav{ float:none;}
.nav ul{}
.nav li{ width:20%; text-align:center; background-color:#f9f9f9; margin-top:auto;}
.nav li a{margin:0 0;border-right:#fff solid 1px; border-bottom:#fff solid 1px;  padding:0 0;}

.w1200{ width:auto;}

/*第二个*/
.yingyu .yingyu-about{ padding:10px 10px;}
.yingyu .yingyu-about span{ width:100%; float:left; margin-right:5%;}

.yingyu-content{ padding:0 10px;}
.yingyu-content .content li{ width:100%; margin:5px 0; }

.changyou{ padding:0 10px;}
.changyou-content span{ width:48%; display:block; margin:0 1%; margin-bottom:1.5%; float:left;}


.tingyu-nav li{ margin:0 0;}
.copyright{ }
.copyright .copyright-logo{ display:none;}
.copyright .copyright-nav{margin-top:5%; margin-left:10px;}
.copyright .copyright-nav h3{color:#fff; padding-bottom:10px; font-size:15px;}
.copyright .copyright-nav h3 a{color:#fff;}
.copyright .copyright-nav p{color:#fff;}
.copyright .copyright-wx{margin-top:5%; float:left;}
.copyright .copyright-wx span{float:left; margin-left:10px;}
.copyright .copyright-wx span h3{color:#fff; font-size:12px; text-align:center; padding:5px 0;}
.sohu-content{width:1200px;margin:0 auto;padding: 50px 0px;}
}