.video-box{
    margin: 0 auto;
    margin-top: 80px;
    width: 80%;
}
.profession-box{
    margin-top: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(128, 128, 128, 0.36);
}
.title{
    background: url("../img/jianjie.png") left center no-repeat;
    background-size: 15px;
    padding-left: 25px;
    margin-bottom: 10px;
    line-height: 16px;
    font-size: 16px;
    color: #1c4a85;
}
.chapter-logo {
    background: url("../img/zy.png") left center no-repeat;
    background-size: 10px;
    padding-left: 15px;
    margin-top: 20px;
    margin-bottom: 10px;
    line-height: 12px;
    font-size: 12px;
    color: black;
}
table{
    width: 100%;
}
td{
    font-size: 12px;
    color: black;
    border-bottom: 1px solid rgba(128, 128, 128, 0.36);
    padding: 5px 0;
}
.td-width{
    width:80px;
}