.main {
    background-color: #f2f7f6;
    padding-top: 72px;
}

.course {
    overflow: hidden;
    background-color: #ffffff;
    padding: 24px;
    margin-bottom: 36px;
    border-radius: 10px;
}

.course .img-wrap {
    width: 596px;
    height: 380px;
    float: left;
    border-radius: 4px;
}

.course .course-txt {
    width: 525px;
    padding-bottom: 36px;
}

.course-txt {

}

.course-title {
    border-bottom: 1px solid #e7e7e7;
}

.course-title h2 {
    font-size: 18px;
    color: #333333;
    font-weight: bold;
}

.course-title small {
    display: block;
    margin: 12px 0;
    font-size: 14px;
    color: #ff6600;
}

.txt-list {
    overflow: hidden;
}

.txt-list li {
    display: flex;
    margin-top: 12px;
}

.txt-list li span {
    float: left;
    display: block;
    width: 74px;
    font-size: 14px;
    color: #8f8f8f;
}

.txt-list li .price {
    color: #ff6600;
}

.txt-list li input {
    display: none;
}

.op-wrap {
    display: flex;
    flex-wrap: wrap;
    width: 500px;
}

.op-wrap .option {
    -webkit-border-radius: 2px;
    -moz-border-radius: 2px;
    border-radius: 2px;
    margin: 0 12px 12px 5px;
    padding: 0 25px 0 6px;
    line-height: 25px;
    cursor: pointer !important;
    font-size: 14px;
    color: #666666;
    background: #ededed url('../images/nomal_bg.png') right no-repeat;
}

.op-wrap .option.on {
    color: #ffffff;
    background: #e45433 url('../images/onclick_bg.png') right no-repeat;
}

.op-wrap .option label {
    font-weight: normal;
    margin-bottom: 0;
}

.txt-list li .toGO {
    width: 146px;
    height: 42px;
    line-height: 42px;
    text-align: center;
    color: #ffffff;
    background-color: #ff6600;
    font-size: 16px;
    border-radius: 4px
}

.info {
    width: 890px;
    background-color: #ffffff;
    border-radius: 10px;
    overflow: hidden;
}

.nav-wrap {
    display: flex;
    border-bottom: 1px solid #dddddd;
}

.nav-wrap li {
    float: left;
    width: 160px;
    height: 60px;
    text-align: center;
    line-height: 60px;
}

.nav-wrap li a {
    display: block;
    width: inherit;
    height: inherit;
    color: #333333;
    font-size: 18px;
}

.nav-wrap li.on {
    background-color: var(--theme-color);
}

.nav-wrap li.on a {
    color: #ffffff;
}

.news-ad {
    background-color: #fff;
}

.detail {
    padding: 24px;
}

.detail p {
    font-size: 16px;
    color: #555555;
    line-height: 26px;
    letter-spacing: 1px;
}

.lists {
    padding: 36px 0;
}

.subject-list {
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
    border-radius: 8px;
    box-shadow: 0px 6px 20px #eaeaea;
    overflow: hidden;
    background-color: #ffffff;
    width: 836px;
    margin: 0 auto;
    margin-bottom: 24px;
}

.subject-list > li {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0px -6px 20px #eaeaea;
}
.subject-list > li:first-child + li{
    border-top-left-radius: unset;
    border-top-right-radius: unset;
}
.subject-list > li:first-child {
    border-radius: unset;
}

.subject-list > li:first-child ol li {
    background-color: #fff;
    height: 86px;
}

.subject-list > li:first-child ol li h2 {
    color: #777777;
    line-height: 86px;
}

.subject-list > li:first-child ol li:first-child h2 {
    color: #ffffff;
}

.subject-list > li:first-child ol li:first-child {
    width: 278px;
    height: 86px;
    background: url("../images/bc-r.png") no-repeat;
    -webkit-background-size: 100% 100%;
    background-size: 100% 100%;
}

.subject-list > li:first-child ol li:first-child + li {
    width: 360px;
}

.subject-list > li:first-child ol li:first-child + li + li {
    width: 196px;
}

.subject-list h2 {
    font-size: 24px;
    color: #ffffff;
    margin-bottom: 6px;
}

.subject-list small {
    font-size: 18px;
    color: #ffffff;
}

.subject-list ol {
    display: flex;
}

.subject-list ol li {
    text-align: center;
}

.subject-list > li ol > li:first-child {
    width: 278px;
    background: url("../images/bc-b.png") no-repeat;
    -webkit-background-size: 100% 100%;
    background-size: 100% 100%;
}

.subject-list > li ol > li:first-child + li {
    width: 360px;
    border-right: 1px solid #DDDDDD;
}

.subject-list > li ol > li:first-child + li + li {
    width: 196px;
}

.subject-list ol li > ul li {
    border-top: 1px solid #DDDDDD;
    line-height: 50px;
    font-size: 16px;
    color: #666666;
}

.subject-list ol li > ul li:first-child {
    border-top: none;
}

.lists p {
    font-size: 16px;
    color: #555555;
    line-height: 26px;
    letter-spacing: 1px;
    text-align: justify;
}

.ad-wrap {
    width: 280px;
}