/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background: transparent;
    color: #333;
    overflow: hidden;
}

/* 内容区域样式 */
.content-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
    padding: 0 20px;
    background: transparent;
}

.video-container {
    position: relative;
    width: 560px;
    height: 315px;
    overflow: hidden;
    border-radius: 12px;
    transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
    cursor: pointer;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: transparent;
}

.video-container:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

/* 视频缩略图 */
.video-thumbnail {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.7s ease, filter 0.5s ease;
}

.video-container:hover .video-thumbnail {
    transform: scale(1.05);
    filter: brightness(0.85) saturate(1.1);
}

/* 遮罩层 */
.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding: 30px;
    box-sizing: border-box;
    opacity: 0;
    transition: opacity 0.5s ease;
    background: linear-gradient(to top,
    rgba(25, 35, 65, 0.85) 0%,
    rgba(25, 35, 65, 0.4) 60%,
    transparent 100%);
}

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

/* 文字内容 */
.video-title {
    text-align: center;
    color: #fff;
    transform: translateY(20px);
    transition: transform 0.5s ease;
    width: 100%;
}

.video-container:hover .video-title {
    transform: translateY(0);
}

.video-title h3 {
    font-size: 28px;
    margin-bottom: 12px;
    font-weight: 600;
    color: #f8f9fa;
    letter-spacing: 0.5px;
}

.video-title p {
    font-size: 16px;
    margin: 0;
    font-weight: 400;
    line-height: 1.6;
    color: rgba(248, 249, 250, 0.9);
    max-width: 80%;
    margin: 0 auto;
}

/* 播放按钮 */
.play-button-img {
    width: 70px;
    height: 70px;
    opacity: 0;
    transform: scale(0.8) translateY(20px);
    transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1) 0.2s;
    cursor: pointer;
    margin-top: 25px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.video-container:hover .play-button-img {
    opacity: 0.95;
    transform: scale(1) translateY(0);
}

.play-button-img:hover {
    opacity: 1;
    transform: scale(1.1) translateY(0);
}

/* 响应式设计 - 内容区域 */
@media (max-width: 600px) {
    .video-container {
        width: 90vw;
        height: calc(90vw * 9 / 16);
    }

    .video-title h3 {
        font-size: 22px;
    }

    .video-title p {
        font-size: 14px;
    }

    .play-button-img {
        width: 50px;
        height: 50px;
    }
    
    .content-wrapper {
        padding: 0 10px;
    }
}