body {
    margin: 0; padding: 0;
    font-family: Arial, sans-serif;
    background: url('backckground.webp') no-repeat center center / cover;
    color: #fff;
    text-align: center;
    position: relative;
    overflow-x: hidden;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 15px;
}

video {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    cursor: pointer;
}

.description {
    margin: 15px 0;
    font-size: 16px;
    line-height: 1.5;
}

img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-top: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

/* 下载按钮 */
.download-btn {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(90deg, #ff5722, #ff795e);
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    text-decoration: none;
    border-radius: 12px;
    box-shadow: 0 6px 12px rgba(0,0,0,0.3);
    transition: all 0.2s ease;
    margin: 10px 0;
}

.download-btn:hover {
    background: linear-gradient(90deg, #e64a19, #ff6347);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.4);
}

/* 弹窗 */
.overlay, .poster-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.85);
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 9999;
    padding: 20px;
    box-sizing: border-box;
}

.overlay.show {
    display: flex;
}

.overlay h2 {
    color: #fff;
    font-size: 24px;
    margin-bottom: 20px;
}

.poster-content {
    position: relative;
    max-width: 480px;
    width: 100%;
    text-align: center;
}

.poster-content img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}

#posterDownloadBtn {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    padding: 15px 40px;
    background: linear-gradient(90deg, #ff5722, #ff795e);
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    text-decoration: none;
    border-radius: 12px;
    box-shadow: 0 6px 12px rgba(0,0,0,0.3);
}