#video-intro {
    text-align: center;
    padding: 2rem;
}

#video-list {
    padding: 2rem;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 1rem;
}

.video-item {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
}

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

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-info {
    padding: 1rem;
}

.video-info h3 {
    margin: 0 0 0.5rem 0;
    color: #333;
}

.video-info p {
    margin: 0;
    color: #666;
    font-size: 0.9rem;
}

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