.buyuns24-course, .buyuns24-single { margin: 16px 0; }
.buyuns24-course-nav {
  display:flex; flex-wrap:wrap; gap:8px; margin-bottom:12px;
}
.buyuns24-lesson-btn{
  border:1px solid #d0d7de; background:#fff; padding:8px 10px; border-radius:10px;
  cursor:pointer; font-size:14px;
}
.buyuns24-lesson-btn.active{ background:#111827; color:#fff; border-color:#111827; }
.buyuns24-warning{
  padding:12px 14px; border:1px solid #f59e0b; background:#fffbeb; border-radius:12px;
}
.buyuns24-writing{
  margin-top:14px; padding:14px; border:1px solid #e5e7eb; border-radius:14px; background:#fff;
}
.buyuns24-task{ margin-top:12px; padding:12px; border:1px solid #e5e7eb; border-radius:12px; background:#fafafa; }
.buyuns24-task h4{ margin:0 0 6px 0; }
.buyuns24-hint{ margin-top:10px; color:#374151; font-size:14px; }