.cousre_container
{
    width: 1200px;
    margin: 0 auto;

}
 .top{
     padding: 29px  16px 54px 7px;
     position: relative;
     background-color: #fff;
 }

 .top .cover{
     width: 465px;
     height: 268px;
     position: absolute;
     top: 29px;
     left: 7px;
 }

 .top .title{
     font-family: Microsoft YaHei;
     font-size: 24px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 40px;
     letter-spacing: 0px;
     color: #4d555d;
     text-align: left;
 }

 .top .date{
     font-family: Microsoft YaHei;
     font-size: 16px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 21px;
     letter-spacing: 0px;
     color: #4d4c4c;
 }

 .top .speaker{
     font-family: Microsoft YaHei;
     font-size: 16px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 30px;
     letter-spacing: 0px;
     color: #4d555d;
     padding: 29px 0 30px 0;
 }
 .top .price-content{
     position: relative;
 }
 .top  .price{
     font-family: Microsoft YaHei;
     font-size: 30px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 31px;
     letter-spacing: 1px;
     color: #cb1b20;

 }
 .top .oldprice{
     font-family: Microsoft YaHei;
     font-size: 20px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 31px;
     letter-spacing: 0px;
     color: #959595;
     padding-left: 51px ;
 }
 .top .btn-buy{

     background-color: #f2ae02;
     border-radius: 10px;
     font-family: Microsoft YaHei;
     font-size: 16px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 31px;
     letter-spacing: 0px;
     color: #ffffff;
     padding: 10px  48px;
     display: inline-block;
 }
 .top .btn-addcart{
     background-color: rgba(252, 222, 116, 0.74);
     border-radius: 10px;
     font-family: Microsoft YaHei;
     font-size: 16px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 31px;
     letter-spacing: 0px;
     color: #f1701a;
     padding: 10px  48px;
     display: inline-block;
 }
.top .btn-learn{

    background-color: rgba(252, 0, 0, 0.74);
    border-radius: 10px;
    font-family: Microsoft YaHei;
    font-size: 16px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 31px;
    letter-spacing: 0px;
    color: #fff;
    padding: 10px  48px;
    display: inline-block;
}
 .top .btn-content{
margin-top: 32px;
 }
 .top .detail{
     margin-left: 496px;
 }

 .mid-title{
     margin: 27px 0 18px 0;
     background-color: #fff;
     width: 934px;
     height: 64px;
     font-family: Microsoft YaHei;
     font-size: 16px;
     font-weight: normal;
     font-stretch: normal;
     line-height: 64px;
     letter-spacing: 1px;
     color: #4d555d;
     position: relative;

 }
.mid-title  .title{
    padding-left: 33px;
    padding-right: 27px;
}
.mid-title .flag{
    width: 0px;
    height: 34px;
    border: solid 5px #348cdc;
    position: absolute;
    top: 15px;
    left:7px;
    background-color: #348cdc;
}
.summary{
    width: 814px;
    background-color: #ffffff;
    font-family: Microsoft YaHei;
    font-size: 14px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 35px;
    letter-spacing: 1px;
    color: #4d555d;
    padding: 25px 60px;
    background: #fff;

}
.summary img{
    max-width: 100%;
}
.catalog{
    width: 934px;
    background-color: #ffffff;
    font-family: Microsoft YaHei;
    font-size: 14px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 35px;
    letter-spacing: 1px;
    color: #4d555d;
    /*padding: 25px 60px;*/
    background: #fff;
    margin-top: 30px;
}
.speaker_introduce{
    width: 237px;
    min-height: 423px;
    background-color: #ffffff;
    float: right;
    text-align: center;
    padding: 32px 12px ;
    margin-top: 27px;
    overflow:hidden;
}
.speaker_introduce .name{
    font-family: Microsoft YaHei;
    font-size: 20px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 26px;
    letter-spacing: 0px;
    color: #4d555d;
    padding: 31px 0 13px 0;
}
.speaker_introduce .title{
    font-family: Microsoft YaHei;
    font-size: 14px!important;
    font-weight: normal;
    font-stretch: normal;
    line-height: 19px;
    letter-spacing: 0px;
    color: #4d555d;
}
.speaker_introduce .desc{
    font-family: Microsoft YaHei;
    font-size: 12px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 16px;
    letter-spacing: 0px;
    color: #4d555d;
    padding-top:15px ;
}
.speaker_pic{
    /*padding-top: 32px;*/
}
.speaker_pic img{
    width: 117px;
    border-radius: 50%;
}

.c-title
{
    padding: 41px 0 22px 60px;
    font-family: Microsoft YaHei;
    font-size: 16px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 30px;
    letter-spacing: 0px;
    color: #4d555d;
    border-bottom: solid 1px #93999F;
}
.chapter{
    padding: 24px  71px 0 53px;
    min-height: 200px;
}
.chapter .title{
    padding-bottom: 10px;
    font-family: Microsoft YaHei;
    font-size: 14px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 30px;
    letter-spacing: 0px;
    color: #4d555d;
}
.chapter .section{
    padding: 7px 0;
    font-family: Segoe UI;
    font-size: 12px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 30px;
    letter-spacing: 0px;
    color: #4d555d;
    position: relative;
}
.chapter .section .type{
    float: right;
    font-family: Segoe UI;
    font-size: 12px;
    font-weight: normal;
    font-stretch: normal;
    line-height: 30px;
    letter-spacing: 0px;
    color: #4d555d;
    display: inline-block;
}