/* ===== Audio Courses (前台) ===== */
.home-tabs { justify-content: flex-start; gap: 18px; }
.home-tab-btn {
  border: none;
  background: none;
  padding: 0 0 4px;
  font-family: inherit;
  font-size: calc(17px * var(--fs-scale));
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--slate-400);
  cursor: pointer;
  position: relative;
}
.home-tab-btn.active { color: var(--slate-800); }
.home-tab-btn.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}

.audio-home-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.audio-course-card {
  display: flex;
  gap: 10px;
  width: 100%;
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--slate-100);
  border-radius: 10px;
  background: var(--white);
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, transform 0.15s;
}
.audio-course-card:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}
.audio-course-play {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}
.audio-course-play .icon { font-size: calc(20px * var(--fs-scale)); }
.audio-course-body { flex: 1; min-width: 0; }
.audio-course-title {
  font-size: calc(14px * var(--fs-scale));
  font-weight: 700;
  color: var(--slate-800);
  margin-bottom: 2px;
}
.audio-course-meta {
  font-size: calc(11px * var(--fs-scale));
  color: var(--slate-500);
  margin-bottom: 4px;
}
.audio-course-summary {
  font-size: calc(12px * var(--fs-scale));
  line-height: 1.5;
  color: var(--slate-600);
  word-break: break-word;
  overflow-wrap: anywhere;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 独立页面 ===== */
.audio-content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 12px 16px 100px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.audio-content::-webkit-scrollbar { display: none; }
.audio-ask {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.audio-ask input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  font-size: max(16px, calc(14px * var(--fs-scale)));
  font-family: inherit;
  border: 1.5px solid var(--slate-200);
  border-radius: 12px;
  outline: none;
}
.audio-ask input:focus { border-color: var(--primary); }
.audio-ask button {
  flex-shrink: 0;
  padding: 0 18px;
  border: none;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-size: calc(14px * var(--fs-scale));
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
}
.audio-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.audio-tag {
  border: 1px solid var(--slate-200);
  border-radius: 999px;
  padding: 6px 12px;
  background: var(--slate-50);
  color: var(--slate-600);
  font-size: calc(12px * var(--fs-scale));
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
}
.audio-tag.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.audio-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.audio-loading, .audio-empty {
  padding: 32px 12px;
  text-align: center;
  color: var(--slate-400);
  font-size: calc(13px * var(--fs-scale));
}

/* ===== 迷你播放条 ===== */
.audio-mini-player {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: calc(72px + env(safe-area-inset-bottom, 0px) + 8px);
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.92);
  color: #fff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.28);
}
.audio-mini-player[hidden] { display: none; }
html[data-ts="l"] .audio-mini-player,
html[data-ts="xl"] .audio-mini-player {
  bottom: calc(88px + env(safe-area-inset-bottom, 0px) + 8px);
}
.audio-mini-toggle {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.audio-mini-title {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  color: #fff;
  text-align: left;
  font-family: inherit;
  font-size: calc(13px * var(--fs-scale));
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}
.audio-mini-progress {
  position: relative;
  flex: 0 0 70px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  touch-action: none;
  outline: none;
}
.audio-mini-progress-fill {
  position: relative;
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
}
.audio-mini-progress-fill::after {
  content: '';
  position: absolute;
  right: -5px;
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  transform: translateY(-50%);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
.audio-mini-progress:focus-visible { box-shadow: 0 0 0 2px var(--primary); }
.audio-mini-time {
  flex-shrink: 0;
  font-size: calc(11px * var(--fs-scale));
  color: rgba(255, 255, 255, 0.8);
  font-variant-numeric: tabular-nums;
}
.audio-mini-close {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ===== 详情抽屉 ===== */
.audio-drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: rgba(15, 23, 42, 0.42);
}
.audio-drawer-panel {
  width: min(640px, 100%);
  max-height: 86vh;
  background: var(--white);
  border-radius: 16px 16px 0 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 -10px 40px rgba(15, 23, 42, 0.18);
}
.audio-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px 10px;
  border-bottom: 1px solid var(--slate-100);
  flex-shrink: 0;
}
.audio-drawer-kicker {
  color: var(--primary);
  font-size: calc(12px * var(--fs-scale));
  font-weight: 800;
}
.audio-drawer-close {
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 50%;
  background: var(--slate-50);
  color: var(--slate-600);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.audio-drawer-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 18px;
}
.audio-detail-title {
  font-size: calc(19px * var(--fs-scale));
  color: var(--slate-900);
  margin-bottom: 6px;
}
.audio-detail-meta {
  color: var(--slate-500);
  font-size: calc(12px * var(--fs-scale));
  margin-bottom: 14px;
}
.audio-detail-player {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}
.audio-detail-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}
.audio-detail-skip {
  position: relative;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--slate-500);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  line-height: 0;
}
.audio-detail-skip svg { display: block; }
.audio-skip-num {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 8px;
  font-weight: 800;
  line-height: 1;
  color: currentColor;
  pointer-events: none;
}
.audio-detail-timeline {
  display: flex;
  align-items: center;
  gap: 10px;
}
.audio-detail-toggle {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.audio-detail-progress {
  position: relative;
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: var(--slate-100);
  cursor: pointer;
  touch-action: none;
  outline: none;
}
.audio-detail-progress-fill {
  position: relative;
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
}
.audio-detail-progress-fill::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  transform: translateY(-50%);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.3);
}
.audio-detail-progress:focus-visible { box-shadow: 0 0 0 2px var(--primary); }
.audio-detail-time {
  flex-shrink: 0;
  font-size: calc(12px * var(--fs-scale));
  color: var(--slate-500);
  font-variant-numeric: tabular-nums;
}
.audio-detail-section {
  margin-top: 14px;
  color: var(--slate-700);
  font-size: calc(14px * var(--fs-scale));
  line-height: 1.7;
}
.audio-detail-section strong {
  display: block;
  color: var(--slate-900);
  margin-bottom: 4px;
}
.audio-detail-external {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 16px;
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: calc(13px * var(--fs-scale));
  font-weight: 700;
  text-decoration: none;
}