/* 视频页面样式 */
.videos-hero {
    height: 40vh;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
                url('../images/videos-bg.png');
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
    padding-top: 80px;
}

.videos-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.videos-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 精选视频区域 */
.featured-video {
    margin-bottom: 3rem;
}

.video-player {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 比例 */
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 视频控制器样式 */
.video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-container:hover .video-controls {
    opacity: 1;
}

.video-controls button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 5px;
    transition: transform 0.2s ease;
}

.video-controls button:hover {
    transform: scale(1.1);
}

.progress-bar {
    flex: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.progress {
    height: 100%;
    background: #3498db;
    border-radius: 2px;
    width: 0;
}

.time {
    color: white;
    font-size: 0.9rem;
}

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

.video-info p {
    color: #666;
    margin-bottom: 5px;
}

.description {
    line-height: 1.6;
    margin-top: 10px;
}

/* 视频分类过滤器 */
.video-categories {
    margin-bottom: 2rem;
}

.category-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 25px;
    background: #f0f0f0;
    color: #333;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.filter-btn:hover {
    background: #e0e0e0;
}

.filter-btn.active {
    background: #3498db;
    color: white;
}

/* 视频网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 2rem;
}

.video-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.video-card:hover {
    transform: translateY(-5px);
}

.video-thumbnail {
    position: relative;
    padding-top: 56.25%; /* 16:9 比例 */
    overflow: hidden;
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-thumbnail:hover .play-overlay {
    opacity: 1;
}

.play-overlay i {
    color: white;
    font-size: 3rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.video-card .video-info {
    padding: 15px;
}

.video-card h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: #2c3e50;
}

.upload-date {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.views {
    color: #666;
    font-size: 0.9rem;
}

.views i {
    margin-right: 5px;
}

/* 加载更多按钮 */
.load-more {
    text-align: center;
    margin-bottom: 3rem;
}

.load-more-btn {
    padding: 12px 30px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s ease;
}

.load-more-btn:hover {
    background: #2980b9;
}

.load-more-btn i {
    margin-left: 8px;
}

/* 视频模态框 */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.video-modal.active {
    display: flex;
}

.modal-content {
    width: 90%;
    max-width: 1200px;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1;
    transition: transform 0.3s ease;
}

.close-modal:hover {
    transform: rotate(90deg);
}

.modal-video-container {
    width: 100%;
    padding-top: 56.25%;
    position: relative;
}

.modal-video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.modal-video-info {
    padding: 20px;
    background: white;
}

.modal-video-info h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .videos-hero {
        height: 30vh;
    }

    .videos-hero h1 {
        font-size: 2rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .video-controls {
        padding: 10px;
    }

    .time {
        display: none;
    }

    .modal-content {
        width: 95%;
    }
}