body {
    background-color: #f8f9fa;
    padding-top: 20px;
}
.card {
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border: none;
    margin-bottom: 20px;
}
.btn-primary {
    background-color: #0d6efd;
}
/* 進度條動畫 */
.progress-bar-animated {
    animation: progress-bar-stripes 1s linear infinite;
}
/* 播放器樣式 */
audio {
    width: 100%;
    height: 30px;
}
/* 列表操作按鈕 */
.action-btn {
    margin-right: 5px;
}