/*清除所有元素默认内外边距*/
* {    
    padding: 0px;
    margin: 0px;
}

/*清除所有a链接的下划线*/
a {
    text-decoration: none;
}

/*清除浮动*/
/*当父元素未指定高度，同时子元素又是浮动的float ，此时该父元素之后的元素将跑到该子元素下方。*/
/*原因是这种情况时父元素的高度为零*/
/*某些需要根据内容动态调整高度的场合就不能给父元素设定高度，此时就可以加入以下清除浮动的代码来解决这个问题*/
/*将浮动元素的父元素添加clearfix类, 该实例中 box-bd 中就用到了*/
.clearfix:before,
.clearfix:after {
    content: "";
    display: table;
}
.clearfix:after {
    clear: both;
}
.clearfix {
    *zoom: 1;
}

/*清除列表样式*/
li {
    list-style: none;
}

button {
    border: none;
}
body {
    background-color: #f4f5f7;
}

.w {
    width: 1200px;
    margin: auto;/*水平居中*/
}

/*------------------------------------header------------------------------------*/
.header {
    height: 42px;
    /*background-color: pink;*/
    margin-top: 30px;
}

.logo img {
    height: 42px;
}

.logo {
    float: left;
}

.nav {
    float: left;
    margin-left: 60px;
}

.nav li {
    float: left;
    margin-right: 20px;
}

.nav li a {
    display: inline-block;
    height: 40px;
    line-height: 40px;
    padding: 0px 10px;
    font-size: 18px;
    color: #050505;
    text-decoration: none;
}

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

.search {
    height: 42px;
    float: left;
    margin-left: 70px;
    background-color: aqua;
}

.search input{
    float: left;/*合并与button行内块空白缝隙*/
    width: 340px;
    height: 40px;
    border: 1px solid #00a4ff;
    border-right: none;
    padding-left: 20px;
    color: #ccc;
}

.search button {
    float: left;/*合并与input行内块空白缝隙*/
    width: 54px;
    height: 42px;
 
    background: url(images/searchPtn.PNG);
}

.user {
    float: right;
    height: 42px;
    line-height: 42px;
    text-align: center center;
    font-size: 14px;
    color: #666;
}

/*------------------------------------banner------------------------------------*/
.banner {
    height: 420px;
    background: #023db1 url(images/bannerBackground.PNG) no-repeat top center;
    margin-top: 30px;
}

.subnav {
    float: left;
    width: 150px;
    height: 420px;
    padding: 0px 20px;
    background-color: rgba(0, 0, 0, 0.3);
}

.subnav li {
    height: 45px;
    line-height: 45px;  
}

.subnav li a {
    color: #fff;
    font-size: 14px;    
}

.subnav li a:hover {
    color: #00b4ff;
}

.subnav span {
    float: right;
}

.course {
    float: right;
    width: 228px;
    height: 300px;
    background-color: white;
    margin-top: 60px;
}

.course-hd {
    height: 48px;
    line-height: 48px;
    text-align: center;
    font: 18px;
    font-weight: bold;
    color: #fff; 
    background-color: #9bceea;   
}

.course-bd {
    padding: 0px 15px;
}

.course-bd ul {
    padding-top: 10px;
}
.course-bd li {
    height: 50px;
    margin-top: 10px;
    border-bottom: 1px solid #ccc;
}

.course-bd li h4 {
    color: #4e4e4e;
    font-size: 14px;
}

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

.course-bd .all {
    margin-top: 10px;
    display: block;
    height: 38px;
    line-height: 38px;
    text-align: center;
    border: 1px solid #00a4ff;
    font-size: 16px;
    color: #00a4ff;
}

.all:hover {
    color: white;
    background-color: #00a4ff;
}

/*------------------------------------goods------------------------------------*/
.goods {
    height: 60px;
    line-height: 60px;
    margin-top: 10px;
    background-color: white;
    box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.2);
}

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

.goods_items {
    margin-left: 20px;
    float: left;
    color: black;
}

.goods_items a {
    margin: 0px 20px;
    color: #050505;
}

.goods_items a:hover {
    color: #00a4ff;
}

.mod {
    float: right;
    font-size: 14px;
    color: #00a4ff;
    margin-right: 30px;
}

/*------------------------------------goods------------------------------------*/
.box {
    margin-top: 15px;
}

.box-hd {
    height: 60px;
    line-height: 60px;
    padding-right: 30px;
}

.box-hd h3 {
    float: left;
    font-size: 20px;
    color: #494949;
    font-weight: normal;
}

.box-hd a {
    float: right;
    font-size: 12px;
    color: #a5a5a5;
}

.box-bd {
    width: 1215px;
}

.box-bd ul li {
    margin-right: 14px;
    margin-bottom: 15px;
    float: left;
    width: 228px;
    height: 270px;
    background-color: white;
    box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.2);
}

.box-bd ul li:hover {
    box-shadow: 8px 8px 8px rgba(0, 0, 0, 0.2);
}

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

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

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

.box-bd p span {
    font-size: 14px;
    color: orange;
}

.test {
    height: 300px;
    background-color: black;
}

/*------------------------------------header------------------------------------*/
.footer {
    padding-top: 30px;
    background-color: #fff;
}

.footer .w {
    background-color: white;
}
.copyright {
    float: left;
    padding-left: 30px;
}
.copyright p {
    font-size: 12px;
    color: #666;
    margin: 20px 0px 15px 0px;
}
.copyright a {
    display: inline-block;
    width: 118px;
    height: 34px;
    color: #00a4ff;
    font-size: 16px;
    line-height: 30px;
    text-align: center;
    margin-bottom: 100px;
    border: 2px solid #00a4ff;
}

.copyright a:hover {
    color: white;
    background-color: #00a4ff;
}

.links {
    float: right;
    margin: 30px 20px 30px 0px;
}

.links dl {
    float: left;
    margin-right: 50px;
}

.links dt {    
    font-size: 16px;
    color: black;
    margin-bottom: 20px;
}

.links dd a {
    font-size: 12px;
    color: #666;
    margin-bottom: 10px;
}

.links dd a:hover {
    color: #00a4ff;
    font-weight: bold;
}