/* 1. 基础样式重置：修复页面无法滚动问题 */
body {
    overflow: auto !important;
    height: auto !important;
}

/* 2. 公共导航栏样式 */
.public-nav {
    width: 100%;
    height: 60px;
    background: #2c3e50;
    position: sticky;
    top: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    padding: 0 20px;
    box-sizing: border-box;
}

.public-nav .nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.public-nav .nav-item {
    margin-right: 30px;
}

.public-nav .nav-link {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.public-nav .nav-link:hover {
    color: #ff700a;
}

.public-nav .nav-right {
    margin-left: auto;
    display: flex;
    align-items: center;
}

.public-nav .user-info {
    color: #fff;
    margin-right: 20px;
    font-size: 14px;
}

/* 3. 顶部课程信息栏 */
.top-menu-wrap {
    position: sticky;
    top: 60px;
    z-index: 9998;
    background: #000;
    padding: 10px 20px;
    box-sizing: border-box;
}

.top-lesson-list {
    line-height: 30px;
    font-size: 16px;
    color: #fff;
}

.top-lesson-list .link {
    color: #ff700a;
}

/* 4. 视频与目录区域 */


.player-box {
    width: 70% !important;
    float: left;
    
    padding-right: 10px;
    box-sizing: border-box;
}

.yixiaowan-player {
    position: relative; /* 新增这一行 */
    width: 100%;
    height: 800px;
    padding-bottom: 36px;
    text-align: center;
    background: #383838;
    display: flex;
    align-items: center;
    justify-content: center;
}

.yixiaowan-player video {
    width: 100%;
    height: auto;
    max-height: 764px;
}

.action-bar-wrap {
    width: 30% !important;
    float: left;
    background-color: #252525;
    height: 800px;
    overflow-y: auto;
    box-sizing: border-box;
    padding-left: 10px;
}

/* 5. 为您推荐区域样式 */
.related-course {
    clear: both; /* 清除浮动，确保在视频区下方显示 */
    padding: 40px 20px;
    background: #f5f5f5;
    margin-top: 30px;
}

.related-course .h5 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #ff700a;
}

.related-course .tab {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    position: relative;
    padding-left: 10px;
}

.related-course .tab::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: #ff700a;
}

.related-course .refresh-btn {
    color: #666;
    font-size: 14px;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: color 0.3s;
}

.related-course .refresh-btn:hover {
    color: #ff700a;
}

.related-course .refresh-btn i {
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-right: 5px;
    background: url(data:image/svg+xml;base64,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) no-repeat center;
}

/* 推荐课程列表 */
.related-course .course-list {
    display: flex;
    gap: 20px;
    overflow-x: auto; /* 超出宽度可横向滚动 */
    padding-bottom: 15px;
    scrollbar-width: thin; /* 细滚动条 */
}

.related-course .course-item {
    min-width: 280px; /* 固定每个课程卡片宽度 */
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.related-course .course-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* 课程缩略图 */
.related-course .course-img {
    position: relative;
    height: 160px;
    overflow: hidden;
}

.related-course .course-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.related-course .course-item:hover .course-img img {
    transform: scale(1.05);
}

/* 视频时长标签 */
.related-course .course-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 4px;
}

/* 课程信息 */
.related-course .course-info {
    padding: 15px;
}

.related-course .course-title {
    font-size: 16px;
    color: #333;
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2; /* 最多显示2行文字 */
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 45px;
}

.related-course .course-title:hover {
    color: #ff700a;
}

.related-course .course-teacher {
    font-size: 13px;
    color: #999;
    margin-bottom: 10px;
}

/* 底部信息 */
.related-course .course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.related-course .course-price {
    color: #ff700a;
    font-weight: bold;
}

.related-course .course-students {
    color: #999;
    font-size: 12px;
    display: flex;
    align-items: center;
}

.related-course .course-students i {
    display: inline-block;
    width: 14px;
    height: 14px;
    margin-right: 3px;
    background: url(data:image/svg+xml;base64,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) no-repeat center;
}

/* 6. 响应式适配 */
@media (max-width: 1200px) {
    .player-box {
        width: 65% !important;
    }
    .action-bar-wrap {
        width: 35% !important;
    }
}

@media (max-width: 768px) {
    .player-box, .action-bar-wrap {
        width: 100% !important;
        float: none !important;
        height: auto !important;
        padding: 0;
        margin-bottom: 20px;
    }
    .yixiaowan-player {
        height: 400px;
    }
    .public-nav .nav-item {
        margin-right: 15px;
    }
    .public-nav .nav-link {
        font-size: 14px;
    }
    
    /* 推荐课程适配 */
    .related-course {
        padding: 20px 15px;
    }
    .related-course .h5 {
        margin-bottom: 15px;
    }
    .related-course .tab {
        font-size: 18px;
    }
    .related-course .course-item {
        min-width: 240px;
    }
    .related-course .course-img {
        height: 140px;
    }
}