.banner-top {
    display: flex;
    height: 400px;
    border-radius: 8px 8px 0 0;
    overflow: hidden;
}

.banner-option {
    position: relative;
    padding: 10px 0;
    width: 280px;
    height: 100%;
    background-color: #2b283d;
}

.scroll-banner {
    width: calc(100% - 280px);
    height: 100%;
}

.scroll-banner img {
    width: 100%;
    height: 100%;
}

.option-left,
.option-left a {
    color: #fff;
}

.option-left a:hover {
    color: #fff;
    text-decoration: none;
}
.option-left span{
    letter-spacing: 1px;
    font-size: 12px;
}
.option-left span a{
    letter-spacing: 1px;
    font-size: 12px;
}
.option-right {
    display: none;
    position: absolute;
    left: 280px;
    top: 0;
    z-index: 999;
    min-width: 750px;
    height:400px;

    border-radius:0 8px 0 0;
    line-height: 20px;
    overflow: hidden;
    color: #000;
    background-color: #fff;

    /*overflow-x:auto;*/
}

.banner-option>li {
    padding: 0 10px;
    height: 30px;
    line-height: 30px;
    overflow: hidden;
}

/*.banner-option li::before {
    position: absolute;
    right: 5px;
    content: '\f0da';
    font: normal normal normal 14px/1 FontAwesome;
    font-size: inherit;
    color: #fff;
    line-height: 40px;
}*/
.banner-option li::before {
    position: absolute;
    right: 5px;
    /*content: '\f0da';*/
    /*font:  FontAwesome;*/
    font-size: inherit;
    color: #fff;
    /*line-height: 40px;*/
    line-height: 30px;
    content: '>'; /* 使用Font Awesome的复选标记图标 */
}

.first-tag{
    font-weight: bold;
}
.detail-desc{
    padding: 15px;
    font-size: 16px;
    font-weight: bold;
    color: #333333;
    opacity: 1;
}
.detail-list{
    /*padding: 0 15px;*/
    padding: 0 5px;
    width: 100%;
    display: flex;
    color: #333333;
    font-weight: 400;
    font-size: 14px;
}
.detail-list ul {
    display: flex;
}
.detail-list ul li{
    /*padding:0 10px;*/
    padding:5px;
}
.detail-list ul li a{
    color: #333;
    font-size: 14px;
    text-decoration:unset;
}
.detail-list ul li a:hover{
    color: #007bff;
}
.list-know{
    color: #333;
    letter-spacing: 2px;
}
.option-right>ul {
    position: absolute;
    bottom: 0;
    display: flex;
    justify-content:space-between;
    flex-wrap: wrap;
    padding: 15px 15px 0 15px;
    width: 100%;
    height: 270px;
    background-color: #f3f5f6;
}
.option-right>ul li{
    margin-bottom: 15px;
    display: flex;
    padding: 10px;
    width: 353px;
    height: 110px;
    border-radius: 8px;
    background: #fff;
    overflow: hidden;
}
.course-right{
    padding: 5px;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 100%;
}
.course-left img{
    width: 130px;
    height: 100%;
    border-radius: 8px;
    cursor: pointer;
}
.course-name{
    padding: unset;
    height: unset;
    font-weight: bold;
    font-size: 12px;
    letter-spacing: 1px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.course-name a{
    color: #333333;
}
.course-name a:hover{
    color: #007bff;
    text-decoration:unset;
}
.course-summary{
    font-size: 12px;
    margin: 7px 0 8px 0px;
    letter-spacing: 1px;
}
.course-buy{
    display: flex;
    justify-content:space-between;
    width: 100%;
    font-size: 12px;
}
.member-vip{
    padding: 1px 5px;
    height: 20px;
    color: #fff;
    font-size: 12px;
    letter-spacing: 1px;
    background: linear-gradient(90deg,#ff928e,#fe7062 99%);
    border-radius: 5px;
}
.price-member{
    color: red;
    font-weight: bold;
    letter-spacing: 1px;
    box-sizing: border-box;
    font-size: 12px;
}
.course-addcard a{
    color: #FF3D17;
    font-size: 12px;
    cursor: pointer;
}
.course-addcard a:hover{
    color: #FF3D17;
    text-decoration: none;
}
.member-free{
    color: #3583FF;
    letter-spacing: 1px;
}
.scroll-banner{
    position: relative;
}
.scroll-content{
    height: 100%;
}
.scroll-item{
    height: 100%;
}
.scroll-item img {
    height: 100%;
}
.scroll-banner .prev {
    position: absolute;
    z-index: 9;
    top: 45%;
    left: 10px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    text-align: center;
    display: block;
    color: #ffffff;
    letter-spacing: normal;
    background: rgba(255,255,255,.5);
}
.scroll-banner .next {
    position: absolute;
    z-index: 9;
    top: 45%;
    right: 10px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    text-align: center;
    display: block;
    color: #ffffff;
    letter-spacing: normal;
    background: rgba(255,255,255,.5);
}
.scroll-banner .prev i, .scroll-banner .next i{
    line-height: 40px;
    font-size: 40px;
}
.scroll-banner .prev:hover, .scroll-banner .next:hover{
    background: rgba(255,255,255,.3);
}
.scroll-btn {
    position: absolute;
    overflow: hidden;
    bottom: 10px;
    z-index: 3;
    width: 100%;
    text-align: center;
    z-index: 100;
}
.scroll-btn span {
    display: inline-block;
    width: 30px;
    height: 5px;
    margin: 0 1px;
    cursor: pointer;
    background: #fff;
    border-radius: 3px;
    margin-right: 5px;
}
.scroll-btn span.current {
    background: #388fff
}