/* 视频列表页面样式 */
.video-list-section {
    padding: 30px 0;
    background-color: #f8f9fa;
}

.video-item {
    margin-bottom: 30px;
    transition: all 0.3s ease;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    background: white;
}

.video-item:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    transform: translateY(-3px);
    border-color: #d9534f;
}

.video-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.video-link:hover {
    text-decoration: none;
    color: inherit;
}

.video-thumbnail {
    position: relative;
    overflow: hidden;
    background: #000;
}

.video-thumbnail img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.video-item:hover .video-thumbnail img {
    transform: scale(1.05);
}

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 48px;
    color: white;
    opacity: 0.8;
    transition: all 0.3s ease;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.video-item:hover .play-icon {
    opacity: 1;
    font-size: 52px;
}

.video-info {
    padding: 15px;
}

.video-title {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 8px;
    line-height: 1.4;
    height: 40px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    color: #333;
}

.video-author, .video-institution {
    margin-bottom: 5px;
    line-height: 1.3;

    display: -webkit-box;
    -webkit-box-orient: vertical;
    word-break: break-word;
}

.video-author {
    -webkit-line-clamp: 1;
}

.video-institution {
    -webkit-line-clamp: 2;
}

.video-author strong, .video-institution strong {
    color: #d9534f;
}

/* 筛选面板样式 */
.panel-default {
    border-color: #ddd;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.panel-heading {
    background-color: #f5f5f5;
    border-color: #ddd;
}

.panel-title {
    color: #333;
    font-weight: bold;
}

.btn-group .btn {
    margin-right: 5px;
    margin-bottom: 5px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.btn-group .btn:hover {
    background-color: #d9534f;
    border-color: #d9534f;
    color: white;
}

.btn-group .btn.active {
    background-color: #d9534f;
    border-color: #d9534f;
    color: white;
}

.btn-group .btn.active:hover {
    background-color: #c9302c;
    border-color: #c9302c;
}

/* 搜索框样式 */
.input-group .form-control {
    border-radius: 4px 0 0 4px;
    border-color: #ddd;
}

.input-group .btn {
    border-radius: 0 4px 4px 0;
    border-color: #d9534f;
    background-color: #d9534f;
}

.input-group .btn:hover {
    background-color: #c9302c;
    border-color: #c9302c;
}

/* 分页样式 */
.pagination {
    margin: 20px 0;
}

.pagination > li > a {
    color: #d9534f;
    border-color: #ddd;
    margin: 0 2px;
}

.pagination > li > a:hover {
    background-color: #f5f5f5;
    border-color: #ddd;
    color: #d9534f;
}

.pagination > .active > a {
    background-color: #d9534f;
    border-color: #d9534f;
    color: white;
}

.pagination > .active > a:hover {
    background-color: #c9302c;
    border-color: #c9302c;
}

.pagination > .disabled > a {
    color: #999;
    background-color: #f5f5f5;
    border-color: #ddd;
}

.page-info {
    margin-top: 20px;
    color: #666;
    font-size: 14px;
    text-align: center;
}

/* 无数据提示样式 */
.no-data {
    text-align: center;
    padding: 80px 0;
    color: #999;
    background: white;
    border-radius: 8px;
    margin: 20px 0;
}

.no-data h3 {
    color: #666;
    margin-bottom: 15px;
}

.no-data p {
    font-size: 16px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .video-item {
        margin-bottom: 20px;
    }
    
    .video-thumbnail img {
        height: 150px;
    }
    
    .video-title {
        font-size: 13px;
        height: 35px;
    }
    
    .btn-group .btn {
        font-size: 12px;
        padding: 5px 8px;
    }
    
    .panel-body {
        padding: 15px;
    }
}

@media (max-width: 576px) {
    .video-list-section {
        padding: 15px 0;
    }
    
    .video-thumbnail img {
        height: 120px;
    }
    
    .video-info {
        padding: 10px;
    }
    
    .video-title {
        font-size: 12px;
        height: 30px;
    }
    
    .video-author, .video-institution {
        font-size: 11px;
    }
}