/* ringtone-maker · 录音棚剪辑台风：炭黑+橙红 */
.rng-wrap {
  --rng-red: #ff5722;
  --rng-red2: #ff8a50;
  --rng-ink: #14171a;
  --rng-bg: #f1f2f4;
  --rng-card: #ffffff;
  --rng-card2: #1d2226;
  --rng-txt: #2e3439;
  --rng-strong: #171b1f;
  --rng-muted: #7d868d;
  --rng-line: rgba(255, 87, 34, .35);
  --rng-green: #3ddc84;
  max-width: 1000px;
  margin: 0 auto;
  padding: 18px 16px 60px;
  color: var(--rng-txt);
  font-size: 15.5px;
  line-height: 1.78;
}
.rng-wrap h1, .rng-wrap h2 { line-height: 1.35; color: var(--rng-strong); }
.rng-wrap b { color: #d84315; }
.rng-kicker {
  display: inline-block; font-size: 13px; letter-spacing: .16em; font-weight: 700;
  color: var(--rng-red); background: var(--rng-ink);
  border: 1px solid var(--rng-line); border-radius: 6px; padding: 4px 14px; margin-bottom: 12px;
}
.rng-hero {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; align-items: center;
  background: linear-gradient(150deg, var(--rng-ink) 0%, #1d2226 60%, #26211d 100%);
  border-radius: 16px; padding: 32px 30px; margin-bottom: 16px;
  position: relative; overflow: hidden;
  box-shadow: 0 16px 42px rgba(10, 12, 14, .5);
}
.rng-hero h1 { font-size: clamp(24px, 4vw, 33px); color: #f4f6f7; margin: 4px 0 10px; }
.rng-hero h1 b { color: var(--rng-red); }
.rng-sub { color: #b9c1c6; margin: 0 0 18px; }
.rng-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.rng-btn {
  display: inline-block; cursor: pointer; text-decoration: none;
  background: #2a3036; color: #e8ebec; font-weight: 700;
  border: 1px solid #3a4147; border-radius: 8px;
  padding: 10px 20px; font-size: 15px;
  transition: transform .15s, box-shadow .15s;
}
.rng-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(0, 0, 0, .35); }
.rng-btn.main { background: linear-gradient(120deg, #e64a19, var(--rng-red)); color: #fff; border-color: transparent; }
.rng-btn.export { background: linear-gradient(120deg, #1d8348, var(--rng-green)); color: #06281a; border-color: transparent; }
.rng-btn.ghost { background: transparent; color: var(--rng-muted); }
.rng-btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.rng-hero input[type="file"] { display: none; }
/* 仪表视觉 */
.rng-hero-art { position: relative; min-height: 170px; }
.rng-vu {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  width: 130px; height: 74px; border-radius: 10px 10px 4px 4px;
  background: radial-gradient(ellipse at 50% 100%, #2a2f34, #14171a 70%);
  border: 2px solid #3a4147; overflow: hidden;
}
.rng-needle {
  position: absolute; bottom: 0; left: 50%; width: 2.5px; height: 56px;
  background: var(--rng-red); transform-origin: bottom center;
  transform: rotate(-38deg); border-radius: 2px;
  box-shadow: 0 0 8px var(--rng-red);
}
.rng-meter { position: absolute; bottom: 18px; left: 14px; right: 14px; height: 46px; display: flex; gap: 7px; align-items: flex-end; }
.rng-meter i { flex: 1; border-radius: 3px 3px 0 0; background: linear-gradient(180deg, var(--rng-red), #7f2711); height: 40%; }
.rng-meter i:nth-child(2) { height: 70%; }
.rng-meter i:nth-child(3) { height: 100%; }
.rng-meter i:nth-child(4) { height: 58%; }
.rng-meter i:nth-child(5) { height: 82%; }
.rng-lamp {
  position: absolute; top: 16px; right: 14px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--rng-green); box-shadow: 0 0 10px var(--rng-green);
}
.rng-note {
  font-size: 13.5px; color: #8a4a12; background: #fdf1e8;
  border: 1.5px dashed var(--rng-red); border-radius: 10px; padding: 10px 14px; margin: 0 0 18px;
}
.rng-card {
  background: var(--rng-card); border: 1px solid rgba(20, 23, 26, .12);
  border-radius: 14px; padding: 24px; margin-bottom: 18px;
  box-shadow: 0 8px 24px rgba(20, 23, 26, .08);
}
.rng-card h2 { font-size: 20px; margin: 0 0 12px; }
.rng-status {
  font-size: 14px; color: var(--rng-muted); background: var(--rng-bg);
  border: 1px solid rgba(20, 23, 26, .1); border-radius: 8px; padding: 8px 12px; margin-bottom: 12px;
}
.rng-wavebox {
  position: relative; background: var(--rng-card2); border: 1px solid #33393f;
  border-radius: 10px; overflow: hidden;
}
.rng-wavebox canvas { display: block; width: 100%; height: 160px; cursor: crosshair; touch-action: none; }
.rng-wave-hint {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: #8d969c; font-size: 14px; pointer-events: none;
}
.rng-io { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 12px; }
.rng-io-group { display: flex; flex-direction: column; gap: 4px; }
.rng-io-group label { font-size: 13px; color: var(--rng-muted); }
.rng-io-group input, .rng-io-group output {
  background: var(--rng-ink); color: var(--rng-red2); border: 1px solid #3a4147;
  border-radius: 8px; padding: 8px 12px; font-size: 16px; width: 120px;
  font-variant-numeric: tabular-nums;
}
.rng-io-group output { color: var(--rng-green); }
.rng-err { display: block; min-height: 20px; font-size: 13.5px; color: #d84315; margin: 8px 0; }
.rng-controls { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 6px; }
.rng-ctrl { flex: 1 1 200px; }
.rng-ctrl label { display: block; font-size: 13.5px; color: var(--rng-muted); margin-bottom: 6px; }
.rng-ctrl label b { color: var(--rng-red); }
.rng-ctrl input[type="range"] { width: 100%; accent-color: var(--rng-red); }
.rng-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.rng-stepgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.rng-stepcard {
  display: flex; gap: 12px; background: var(--rng-bg);
  border-left: 4px solid var(--rng-red); border-radius: 10px; padding: 12px 14px;
}
.rng-stepcard p { margin: 0; font-size: 14px; }
.rng-stepno {
  flex: 0 0 30px; height: 30px; border-radius: 8px; background: var(--rng-ink);
  color: var(--rng-red2); font-weight: 800; display: flex; align-items: center; justify-content: center;
}
.rng-steps { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.rng-faq { margin: 0; }
.rng-faq dt { font-weight: 700; color: var(--rng-strong); margin-top: 14px; }
.rng-faq dd { margin: 4px 0 0; }
.rng-src { font-size: 13px; color: var(--rng-muted); border-top: 1px solid rgba(20, 23, 26, .12); padding-top: 12px; margin-top: 26px; }
@media (max-width: 768px) {
  .rng-hero { grid-template-columns: 1fr; padding: 24px 18px; }
  .rng-hero-art { min-height: 150px; }
  .rng-card { padding: 18px 14px; }
  .rng-stepgrid { grid-template-columns: 1fr; }
}
@media (max-width: 400px) {
  .rng-cta .rng-btn, .rng-actions .rng-btn { flex: 1 1 100%; text-align: center; }
  .rng-io-group input, .rng-io-group output { width: 100%; }
  .rng-io-group { flex: 1 1 100%; }
}
/* 深色模式：本工具默认即炭黑仪表风，深色模式整体压暗 */
html[data-theme="dark"] .rng-wrap {
  --rng-bg: #101316;
  --rng-card: #181d21;
  --rng-txt: #ccd4d9;
  --rng-strong: #f4f6f7;
  --rng-muted: #8d969c;
}
html[data-theme="dark"] .rng-note { color: var(--rng-red2); background: rgba(255, 87, 34, .08); }
html[data-theme="dark"] .rng-btn { background: #23292e; }
html[data-theme="dark"] .rng-status { background: var(--rng-bg); border-color: #2c3237; }
html[data-theme="dark"] .rng-stepcard { background: var(--rng-bg); }

/* ===== v1.1 · 多段拼接 / 本地铃声库 / 平台指引 ===== */
.rng-merge { margin-top: 18px; border-top: 1px dashed var(--rng-line, rgba(0,0,0,.15)); padding-top: 14px; }
.rng-merge h3 { font-size: 17px; margin: 0 0 8px; }
.rng-seg-item {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  background: var(--rng-card2, rgba(0,0,0,.04));
  border: 1px solid var(--rng-line, rgba(0,0,0,.12));
  border-radius: 8px; padding: 7px 10px; margin-bottom: 6px; font-size: 14px;
}
.rng-seg-total { font-size: 13.5px; margin: 8px 0 0; }
.rng-empty { color: var(--rng-muted, #888); font-size: 14px; margin: 6px 0; }
.rng-lib-item {
  display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap;
  border: 1px solid var(--rng-line, rgba(0,0,0,.12));
  border-radius: 8px; padding: 8px 10px; margin-bottom: 6px;
}
.rng-lib-info b { display: block; font-size: 14.5px; }
.rng-lib-info small { color: var(--rng-muted, #888); font-size: 12.5px; }
.rng-lib-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.rng-lib-actions .rng-btn { padding: 6px 12px; font-size: 13px; }
.rng-plat-row { margin: 4px 0 10px; }
.rng-plat-row select { padding: 8px 10px; border-radius: 8px; border: 1px solid var(--rng-line, rgba(0,0,0,.2)); background: var(--rng-card, #fff); color: inherit; font-size: 15px; }
.rng-plat-hint { font-size: 14px; line-height: 1.7; margin: 0 0 12px; }
@media (max-width: 768px) {
  .rng-seg-item, .rng-lib-item { flex-direction: column; align-items: flex-start; }
  .rng-lib-actions { width: 100%; }
  .rng-lib-actions .rng-btn { flex: 1; }
}