* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.video-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.video-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.video-card h3 {
    padding: 10px;
    font-size: 1.1em;
}

.video-card p {
    padding: 0 10px 10px;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 480px) {
    .video-grid {
        grid-template-columns: 1fr;
    }
}