* {
    margin:0;
    padding: 0;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
}

.clearfix:before ,.clearfix:after {
    content: "";
    display: table;
}
.clearfix:after {
    clear: both;
}
/*版心*/
.w {
    width: 1200px;
    margin: auto;
}
body {
    background-color: #f3f5f7;
}
.header {
    height: 42px;
    margin: 30px auto;
}
.logo {
    float: left;
    width: 198px;
    height: 42px;
}
.nav {
    float: left;
    margin-left: 60px;
}

.nav ul li {
    float: left;
    margin: 0 15px;
}

.nav ul li a {
    display: inline-block;
    height: 42px;
    padding: 0 10px;
    line-height: 42px;
    font-size: 18px;
    color:#050505;
}

.nav ul li a:hover {
    border-bottom: 2px solid #00a4ff;
    color:#00a4ff
}

.search {
    float: left;
    width: 412px;
    height: 42px;
    margin-left: 70px;
}

.search input {
    float: left;
    width: 345px;
    height: 40px;
    border:1px solid #00a4ff;
    border-right:0 ;
    color: #bfbfbf;
    font-size: 14px;
    padding-left: 15px;
}

.search button {
    float: left;
    width: 50px;
    height: 42px;
    border: 0;
    background:url(images/btn.png);
}

.user {
    float: right;
    line-height: 42px;
    margin-right: 30px;
    font-size: 14px;
    color: #601230;
}

.banner {
    height: 421px;
    background-color: #1c036c;
}

.banner .w {
    height: 421px;
    background: url(images/banner2.png) no-repeat top center;
}

.subnav {
    float: left;
    width: 190px;
    height: 421px;
    background-color:rgba(0,0,0,.3) ;
}

.subnav ul li {
    margin: 0 20px;
    height: 45px;
    line-height: 45px;
}
.subnav ul li a {
    display: block;
    font-size: 14px;
    color:#fff;
}

.subnav ul li a span {
    float: right;
}
.subnav ul li a:hover {
    color:#00a4ff;
}
.course {
    float: right;
    width: 230px;
    height: 300px;
    background-color: #fff;
    /*浮动的盒子没有外边距合并问题*/
    margin-top: 50px;
}

.course h2 {
    height: 48px;
    
    text-align: center;
    line-height: 48px;
    font-size: 18px;
    background-color: #9bceea;
    color: white;
}

.bd {
    padding: 0 20px;
}

.bd ul li {
    padding: 14px 0;
    border-bottom: 1px solid #ccc;
}
.bd ul li h4 {
    font-size: 16px;
    color: #4e4e4e ;
}

.bd ul li p {
    font-size: 12px;
    color: #a5a5a5;
}

.bd .more {
    display: block;
    height: 38px;
    border: 1px solid #00a4ff;
    margin-top: 5px;
    text-align: center;
    line-height: 38px;
    font-size: 16px;
    color:#00a4ff;
    font-weight: 700;
}

.goods {
    height: 60px;
    background-color: #fff;
    margin-top: 10px;
    box-shadow: 0 2px 3px 3px rgba(0,0,0,.1);
    /*行高会继承给3个孩子*/
    line-height: 60px;
}

.goods h3 {
    float: left;
    margin-left: 30px;
    font-size: 16px;
    color: #00a4ff;
}
.goods ul {
    float: left;
    margin-left: 30px;
}
.goods .mod {
    float: right;
    margin-right: 30px;
    font-size: 14px;
    color: #00a4ff;
}
.goods ul li {
    float: left;
}

.goods ul li a {
    padding: 0 30px;
    font-size: 16px;
    color: #050505;
    border-left: 1px solid #ccc;
}

.box {
    margin-top: 30px;

}
.box-hd {
    height: 45px;
}
.box-hd h3{
    float: left;
    font-size: 20px;
    color: #494949;
}
.box-hd a {
    float: right;
    font-size: 12px;
    color: #a5a5a5;
    margin-top: 10px; 
    margin-right: 30px;
}
.box-bd ul {
    width: 1225px;
}
/*把 li 的父亲 ul 修改的足够宽就不会换行了*/
.box-bd ul li {
    float: left;
    width: 228px;
    height: 270px;
    background-color: #fff;
    margin-right: 15px;
    margin-bottom: 15px;
}

.box-bd ul li img {
    width: 100%;
}

.box-bd ul li h4 {
    margin: 20px 20px 20px 25px ;
    font-size: 14px;
    font-weight: normal;
    color:#050505;

}

.box-bd .info {
    margin: 0 20px 0 25px;
    font-size: 12px;
    color: #999;
}

.box-bd .info span {
    color:#ff7c2d;
}

.footer {
    height: 415px;
    background-color: #fff;
}

.footer .w {
    padding-top: 35px;
    /*用margin会产生外边距合并问题*/
    /*没设置宽padding不会撑大盒子*/
}

.copyright {
    float: left;
}
.links {
    float: right;
}
.links dl {
    float: left;
    margin-left: 100px;
}
.links dl dd {
    font-size: 16px;
    color: #333;
}

.links dl dd a {
    color: #333;
    font-size: 12px;
    margin: bottom 5px; 
}
.copyright p {
    font-size: 12px;
    color: #666;
    margin: 20px 0 15px 0;
}
.copyright .app {
    display: block;
    width: 118px;
    height: 33px;
    border: 1px solid #00a4ff;
    text-align: center;
    line-height: 33px;
    color: #00a4ff;
    font-size: 16px;
}