/* MP4 轉 MP3 */
.m2m-note { background: #fff8e6; border-left: 4px solid #d9a400; padding: 10px 14px; border-radius: 6px; font-size: 1rem; }
.m2m-audio { display: block; width: 100%; margin: 10px 0; }
.it-field[hidden] { display: none; }