/* bgm-finder · 音频波形风：黑色+荧光青、CD 旋转 */
.bgm-wrap {
  --bgm-cyan: #22d3ee;
  --bgm-cyan2: #67e8f9;
  --bgm-dark: #0a0e12;
  --bgm-bg: #f2f7f8;
  --bgm-card: #ffffff;
  --bgm-card2: #eef6f8;
  --bgm-txt: #2f3b40;
  --bgm-strong: #10181c;
  --bgm-muted: #6f828a;
  --bgm-line: rgba(34, 211, 238, .35);
  --bgm-bad: #e25c5c;
  max-width: 1000px;
  margin: 0 auto;
  padding: 18px 16px 60px;
  color: var(--bgm-txt);
  font-size: 15.5px;
  line-height: 1.78;
}
.bgm-wrap h1, .bgm-wrap h2 { line-height: 1.35; color: var(--bgm-strong); }
.bgm-wrap b { color: #0891b2; }
.bgm-kicker {
  display: inline-block; font-size: 13px; letter-spacing: .16em; font-weight: 700;
  color: var(--bgm-cyan); background: var(--bgm-dark);
  border: 1px solid var(--bgm-line); border-radius: 6px; padding: 4px 14px; margin-bottom: 12px;
}
.bgm-hero {
  display: grid; grid-template-columns: 1.35fr 1fr; gap: 24px; align-items: center;
  background: linear-gradient(155deg, var(--bgm-dark) 0%, #101a20 60%, #0d232b 100%);
  border-radius: 18px; padding: 32px 30px; margin-bottom: 16px;
  position: relative; overflow: hidden;
  box-shadow: 0 16px 42px rgba(6, 20, 26, .5);
}
.bgm-hero h1 { font-size: clamp(24px, 4vw, 33px); color: #eafcff; margin: 4px 0 10px; }
.bgm-hero h1 b { color: var(--bgm-cyan); }
.bgm-sub { color: #a9c3ca; margin: 0 0 18px; }
.bgm-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.bgm-btn {
  display: inline-block; cursor: pointer; text-decoration: none;
  background: transparent; color: var(--bgm-cyan); font-weight: 700;
  border: 1.5px solid var(--bgm-line); border-radius: 8px;
  padding: 9px 20px; font-size: 15px;
  transition: transform .15s, box-shadow .15s;
}
.bgm-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(34, 211, 238, .25); }
.bgm-btn.main { background: linear-gradient(120deg, #0891b2, var(--bgm-cyan)); color: #04191e; border-color: transparent; }
.bgm-btn.ai { color: #a7f3d0; border-color: rgba(110, 231, 183, .5); }
.bgm-btn.ghost { color: var(--bgm-muted); }
.bgm-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
/* CD 旋转视觉 */
.bgm-hero-art { position: relative; min-height: 190px; display: flex; align-items: center; justify-content: center; }
.bgm-cd {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  width: 96px; height: 96px; border-radius: 50%;
  background:
    repeating-radial-gradient(circle at 50% 50%, #123b46 0 2px, #0c2830 2px 5px),
    radial-gradient(circle at 34% 30%, #67e8f955, transparent 45%),
    conic-gradient(#0c2830, #155e75, #0c2830, #155e75, #0c2830);
  border: 3px solid #0e1418;
  box-shadow: 0 10px 26px rgba(0, 0, 0, .5);
  animation: bgm-spin 6s linear infinite;
}
.bgm-cd-hole {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 20px; height: 20px; border-radius: 50%; background: #eafcff; border: 3px solid #0a0e12;
}
@keyframes bgm-spin { to { transform: translateX(-50%) rotate(360deg); } }
/* 波形条 */
.bgm-wave {
  position: absolute; bottom: 10px; left: 20px; right: 20px; height: 56px;
  display: flex; align-items: flex-end; gap: 6px;
}
.bgm-wave i {
  flex: 1; border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--bgm-cyan2), #0891b2);
  animation: bgm-bar 1.4s ease-in-out infinite;
  height: 30%;
}
.bgm-wave i:nth-child(odd) { animation-duration: 1.1s; }
.bgm-wave i:nth-child(3n) { animation-duration: 1.7s; }
.bgm-wave i:nth-child(4n) { animation-duration: 0.9s; }
@keyframes bgm-bar {
  0%, 100% { height: 18%; }
  50% { height: 92%; }
}
@media (prefers-reduced-motion: reduce) {
  .bgm-cd { animation: none; }
  .bgm-wave i { animation: none; height: 40%; }
}
.bgm-card {
  background: var(--bgm-card); border: 1px solid var(--bgm-line);
  border-radius: 14px; padding: 24px; margin-bottom: 18px;
  box-shadow: 0 8px 24px rgba(8, 60, 76, .08);
}
.bgm-card h2 { font-size: 20px; margin: 0 0 12px; }
.bgm-tip { font-size: 14px; color: var(--bgm-muted); margin: 0 0 14px; }
.bgm-filter-group { display: flex; align-items: flex-start; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.bgm-fl { font-size: 13.5px; color: var(--bgm-muted); padding-top: 6px; min-width: 62px; }
.bgm-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.bgm-chip {
  cursor: pointer; background: transparent; color: var(--bgm-txt);
  border: 1.5px solid var(--bgm-line); border-radius: 999px; padding: 5px 15px; font-size: 14px; font-weight: 600;
}
.bgm-chip.active { background: linear-gradient(120deg, #0891b2, var(--bgm-cyan)); color: #04191e; border-color: transparent; }
.bgm-actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0 4px; }
.bgm-err { display: block; min-height: 20px; font-size: 13.5px; color: var(--bgm-bad); }
.bgm-results { display: grid; gap: 12px; margin-top: 8px; }
.bgm-result {
  background: var(--bgm-card2); border: 1px solid var(--bgm-line);
  border-left: 5px solid var(--bgm-cyan); border-radius: 10px; padding: 14px 16px;
}
.bgm-result h3 { margin: 0 0 6px; font-size: 16.5px; color: var(--bgm-strong); }
.bgm-result p { margin: 3px 0; font-size: 14px; }
.bgm-result .bgm-kw { color: #0891b2; font-weight: 600; }
.bgm-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.bgm-tag {
  font-size: 12px; color: #04424d; background: rgba(34, 211, 238, .18);
  border-radius: 999px; padding: 2px 10px;
}
.bgm-ai-result {
  margin-top: 12px; background: rgba(110, 231, 183, .08);
  border: 1.5px dashed rgba(110, 231, 183, .5); border-radius: 12px; padding: 16px 18px;
}
.bgm-ai-result h3 { margin: 0 0 8px; font-size: 16px; color: #0f766e; }
.bgm-ai-result p { margin: 0 0 6px; font-size: 14.5px; white-space: pre-wrap; }
.bgm-ai-err { color: var(--bgm-bad); }
.bgm-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.bgm-table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 620px; }
.bgm-table th, .bgm-table td { border: 1px solid var(--bgm-line); padding: 9px 12px; text-align: left; vertical-align: top; }
.bgm-table thead th { background: var(--bgm-dark); color: var(--bgm-cyan); white-space: nowrap; }
.bgm-table tbody tr:nth-child(even) { background: var(--bgm-card2); }
.bgm-rules { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.bgm-steps { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.bgm-card.warn { border: 2px solid rgba(226, 92, 92, .5); }
.bgm-card.warn h2 b { color: var(--bgm-bad); }
.bgm-faq { margin: 0; }
.bgm-faq dt { font-weight: 700; color: var(--bgm-strong); margin-top: 14px; }
.bgm-faq dd { margin: 4px 0 0; }
.bgm-src { font-size: 13px; color: var(--bgm-muted); border-top: 1px solid var(--bgm-line); padding-top: 12px; margin-top: 26px; }
@media (max-width: 768px) {
  .bgm-hero { grid-template-columns: 1fr; padding: 24px 18px; }
  .bgm-hero-art { min-height: 150px; }
  .bgm-card { padding: 18px 14px; }
}
@media (max-width: 400px) {
  .bgm-cta .bgm-btn, .bgm-actions .bgm-btn { flex: 1 1 100%; text-align: center; }
}
/* 深色模式 */
html[data-theme="dark"] .bgm-wrap {
  --bgm-bg: #05080a;
  --bgm-card: #0d1418;
  --bgm-card2: #121c21;
  --bgm-txt: #c4d6db;
  --bgm-strong: #eafcff;
  --bgm-muted: #7f949c;
  --bgm-line: rgba(34, 211, 238, .4);
}
html[data-theme="dark"] .bgm-wrap b { color: var(--bgm-cyan); }
html[data-theme="dark"] .bgm-chip.active { color: #04191e; }
html[data-theme="dark"] .bgm-tag { color: var(--bgm-cyan2); }
html[data-theme="dark"] .bgm-ai-result { background: rgba(110, 231, 183, .06); }
html[data-theme="dark"] .bgm-result h3 { color: var(--bgm-strong); }

/* ===== v1.1 · 一键场景 / 歌单勾选 / 情绪试听 ===== */
.bgm-preset-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.bgm-preset-row .bgm-btn { padding: 7px 14px; font-size: 14px; }
.bgm-pick-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-weight: inherit; }
.bgm-pick { width: 16px; height: 16px; accent-color: var(--bgm-main, #7c5cff); }
.bgm-play { margin-top: 8px; padding: 6px 14px; font-size: 13.5px; }
@media (max-width: 768px) {
  .bgm-preset-row .bgm-btn { flex: 1 1 40%; }
  .bgm-actions .bgm-btn { flex: 1 1 100%; }
}