body {
    background: #f7f7f7;
    font-family: 'Inter', '微软雅黑', Arial, sans-serif;
    margin: 0;
    padding: 0;
}
.video-container {
    max-width: 600px;
    margin: 40px auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 24px 20px 32px 20px;
    text-align: center;
}
.video-container h2 {
    margin-bottom: 18px;
    font-size: 1.3em;
    color: #222;
}
.tip {
    margin-top: 16px;
    color: #888;
    font-size: 0.98em;
}