/* 主体样式 */
body {
    background-color: #f9f3e9;
    color: #333;
    line-height: 1.6;
    font-family: 'Microsoft YaHei', sans-serif;
}

.section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: #8b0000;
    position: relative;
    padding-bottom: 1.5rem;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 4px;
    background-color: #8b0000;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.video-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.video-thumbnail {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

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

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(139, 0, 0, 0.8);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s;
}

.play-button:hover {
    background-color: rgba(139, 0, 0, 1);
}

.play-button i {
    font-size: 24px;
    margin-left: 5px;
}

.video-info {
    padding: 1.5rem;
}

.video-title {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: #333;
}

.video-desc {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .video-grid {
        grid-template-columns: 1fr;
    }
}