*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
li{
    list-style: none;
}
.hidden{
    display: none;
}
.show{
    display: block;
}
.name{
    margin-top: 10px;
}
button{
    font-family: "Microsoft Yahei", simHei;
}
.dx{
    border-bottom: 2px solid #3463b1;
}
/********* 背景颜色 *********/
.bg{
    background-color: #f5f5f5;
    font-family: "Microsoft Yahei", simHei;
}
/**************** d2部分 *******************/
.d2{
    font-family: "Microsoft Yahei", simHei;
    margin-bottom: 18px;
    border-bottom: 1px solid #cccccc;
    background: #fff;
}
/****** 图的部分 ******/
.d2 > .tu{
    position: relative;
    background-color: #fff;
    width: 100%;
    height: 312px;
}
.d2 > .tu > img{
    width: 100%;
    height: 360px;
}
.d2 > .tu  > div{
    position: absolute;
    left: 20px;
    bottom: -70px;
    overflow: auto;
    width: 50%;
}
.d2 > .tu > div > img{
    max-width: 126px;
    max-height: 125px;
    float: left;
    border: 1px solid #ddd;
}
/******** title部分 *********/
/*** 左边的up ***/
.title{
    padding: 0 18px;
    height: 106px;
    padding-top: 13px;
    overflow: hidden;
    background: #fff;
}
.title > div:first-child{
    float: left;
}
.title > div:first-child > ul{
    overflow: hidden;
}
.title > div:first-child > ul > li{
    float: left;
}
.title > div:first-child > ul:first-child > li{
    margin-right: 10px;
    padding: 0;
    height: 37px;
}
.title > div:first-child > ul:first-child > li:nth-child(2) > img{
    margin-top: 2px;
}
.title > div:first-child > ul:first-child > li:nth-child(3) > img{
    margin-top: 6px;
}
.title > div:first-child > ul:first-child > li:last-child{
    margin-right: 0;
}
.title > div:first-child > ul:first-child > li > img{
}
.title > div:first-child > ul:first-child > li:first-child > span{
    display: block;
    font-size: 26px;
    padding: 0;
}
/*** 左边的down ***/
.title > div:first-child > ul:nth-child(2){
    margin-top: 10px;
}
.title > div:first-child > ul:nth-child(2) > li:first-child > span{
    color: #345CA7;
    font-size: 24px;
    margin-right: 10px;
    display: inline-block;
    vertical-align: middle;
    height: 32px;
    line-height: 32px;
}
.title > div:first-child > ul:nth-child(2) > li:nth-child(2) > s{
    display: inline-block;
    color: #b3b3b3;
    font-size: 20px;
    height: 32px;
    line-height: 32px;
}
/****** 右边的 *******/
.title > div:nth-child(2){
    float: right;
    width: 100px;
    height: 86px;
    text-align: right;
    padding-top: 6px;
    padding-left: 60px;
}
.title > div:nth-child(2) > p:first-child > b{
    display: block;
    width: 19px;
    height: 22px;
    background-image: url("../../../images/learn/web_good.png");
    background-repeat: no-repeat;
    margin: 10px auto;
}
.htl{
    background-position: 0 -24px;
}
.title > div:nth-child(2) > p:nth-child(2) > span{
    display: block;
    text-align: center;
    font-size: 15px;
    color: #666666;
}
/************ d3部分 ************/
.d3{
    background-color: #fff;
    padding-bottom: 18px;
    border-top: 1px solid #cccccc;
    border-bottom:  1px solid #cccccc;
}
.d3 > p{
    font-size: 26px;
    padding: 18px;
}
.d3 > div{
    width: 100%;
    overflow: hidden;
    height: 150px;
    position: relative;
}
.d3 > div > ul{
    margin-left: 26px;
    overflow: hidden;
    overflow: hidden;
    width: 2000px;
}
.d3 > div > ul > li{
    float: left;
    overflow: hidden;
    margin-right: 18px;
}
.d3 > div > ul > li > div{
    float: left;
}
.d3 > div > ul > li > div > a > img{
    width: 120px;
    height: 140px;
}
.d3 > div > ul > li > div:nth-child(2){
    width: 120px;
    height: 140px;
    margin-left: 18px;
    padding-top: 42px;
}
.d3 > div > ul > li > div:nth-child(2) > p{

}
.d3 > div > ul > li > div:nth-child(2) > p:first-child{
    font-size: 26px;
    color: #345CA7;
}
.d3 > div > ul > li > div:nth-child(2) > p:nth-child(2){
    color: #666666;
}
/********** d4部分 **********/
.d4{
    margin-top: 18px;
    margin-bottom: 108px;
}
.d4 > .bt{
    font-size: 24px;
    overflow: hidden;
    border-bottom: 1px solid #cccccc;
    border-top: 1px solid #cccccc;
    width: 100%;
    background-color: #fff;
}
.d4 > .bt > span{
    float: left;
    height: 54px;
    line-height: 54px;
    text-align: center;
    color: #666666;
    width: 50%;
}
/*** class = intro(简介) ***/
#introNr{
    padding:18px;
    background-color: #fff;
}
#introNr .st{
    display: inline-block;
    height: 16px;
    border: 1px solid #345CA7;
}
#introNr > ul > li > p:first-child > span {
    font-size: 18px;
}
#introNr > ul > li > p:nth-child(2) > span {
    font-size: 18px;
    color: #969696;
}
/*** class = catalog(目录) ***/
.d4 > .catalog{
}
#catalogNr> p{
    height: 53px;
    line-height: 50px;
    background-color: #f5f5f5;
    font-size: 24px;
    color: #3463b1;
    padding: 0 18px;
    border-bottom: 1px solid #cccccc;
}
#catalogNr> ul{
    background-color: #ffffff;
    padding-top: 12px;
}
#catalogNr> ul > li{
    overflow: hidden;
    margin-bottom: 12px;
    padding-left: 14px;
}

#catalogNr> ul > li > b{
    float: left;
    height: 34px;
    width: 34px;
    background-image: url("../../../images/learn/web_judge.png");
    background-repeat: no-repeat;
    margin-right: 18px;
}
#catalogNr> ul > li .qh{
    background-position: 0 -36px;
}
#catalogNr> ul > li > span{
    float: left;
    height: 34px;
    line-height: 34px;
    font-size: 26px;
    color: #666666;
}