@font-face {
  font-family: "XianGe Serif";
  src: url("assets/fonts/serif.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #070a0c;
  --bg-soft: #0b1114;
  --panel: #10181c;
  --panel-2: #0d1418;
  --ink: #f3eee3;
  --muted: #98a5a9;
  --muted-2: #6f7c81;
  --gold: #c9a25a;
  --gold-2: #e4bd75;
  --gold-dark: #9a7438;
  --teal: #5fb9ad;
  --line: rgba(232, 225, 210, 0.1);
  --line-strong: rgba(232, 225, 210, 0.18);
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: "XianGe Serif", "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --max: 1240px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 800px at 82% -10%, rgba(201, 162, 90, 0.1), transparent 62%),
    radial-gradient(900px 700px at 8% 18%, rgba(50, 93, 105, 0.12), transparent 60%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: rgba(201, 162, 90, 0.35); color: #fff; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
img { max-width: 100%; display: block; }

.grain {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------------------------------------------------------------- nav */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  height: 76px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 260ms ease, border-color 260ms ease, backdrop-filter 260ms ease;
}

.nav.is-scrolled {
  background: rgba(7, 10, 12, 0.78);
  border-bottom-color: var(--line);
  backdrop-filter: blur(18px) saturate(120%);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.brand span {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
  margin-right: 26px;
}

.nav-links a {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 180ms ease;
}

.nav-links a:hover { color: var(--ink); }

.nav-play {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 16px;
  border: 1px solid rgba(201, 162, 90, 0.36);
  border-radius: 999px;
  background: rgba(201, 162, 90, 0.06);
  color: var(--gold-2);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.nav-play:hover {
  background: rgba(201, 162, 90, 0.12);
  border-color: rgba(201, 162, 90, 0.62);
  transform: translateY(-1px);
}

.glyph {
  display: inline-block;
  font-size: 11px;
  line-height: 1;
}

/* ---------------------------------------------------------------- hero */

.hero {
  position: relative;
  padding: 150px 0 34px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0, transparent 49.9%, rgba(232, 225, 210, 0.045) 50%, transparent 50.1%),
    repeating-linear-gradient(180deg, transparent 0 118px, rgba(232, 225, 210, 0.035) 119px, transparent 120px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 82%);
  opacity: 0.6;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 44px;
  align-items: center;
}

.hero-copy { position: relative; z-index: 6; }

.kicker {
  margin: 0 0 20px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  margin: 0;
}

h1 {
  font-size: clamp(44px, 3.9vw, 56px);
  line-height: 1.18;
  letter-spacing: 0.005em;
  color: var(--ink);
}

.lead {
  max-width: 520px;
  margin: 26px 0 0;
  color: #b7c1c4;
  font-size: 17px;
  line-height: 1.9;
  letter-spacing: 0.01em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 34px 0 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 52px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-gold {
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  color: #17110a;
  box-shadow: 0 14px 36px rgba(201, 162, 90, 0.2);
}

.btn-gold:hover { box-shadow: 0 18px 44px rgba(201, 162, 90, 0.3); }

.btn-ghost {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.025);
  color: var(--ink);
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.06); border-color: rgba(232, 225, 210, 0.3); }

.micro {
  margin: 0;
  color: var(--muted-2);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.nowrap { white-space: nowrap; }

.proof {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 42px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
}

.proof > div {
  min-width: 0;
  padding-right: 16px;
  border-right: 1px solid var(--line);
}

.proof > div:not(:first-child) { padding-left: 18px; }
.proof > div:last-child { border-right: 0; }

.proof dt {
  font-family: var(--serif);
  color: var(--ink);
  font-size: 25px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.proof dd {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

/* ---------------------------------------------------------------- hero visual */

.hero-visual {
  position: relative;
  height: 690px;
  min-width: 0;
  perspective: 1200px;
}

.stage-glow {
  position: absolute;
  inset: 2% -8% 0 -14%;
  background:
    radial-gradient(50% 44% at 65% 36%, rgba(201, 162, 90, 0.2), transparent 72%),
    radial-gradient(40% 36% at 34% 66%, rgba(64, 122, 130, 0.15), transparent 72%);
  filter: blur(18px);
  opacity: 0.95;
}

.phone {
  position: absolute;
  padding: 7px;
  border-radius: 40px;
  background: linear-gradient(145deg, #353b3e 0%, #121618 42%, #080b0d 100%);
  box-shadow:
    0 38px 90px rgba(0, 0, 0, 0.62),
    0 0 0 1px rgba(255, 255, 255, 0.09),
    inset 0 0 0 1px rgba(255, 255, 255, 0.07);
  isolation: isolate;
}

.phone::before {
  content: "";
  position: absolute;
  inset: 7px;
  z-index: 2;
  pointer-events: none;
  border-radius: 33px;
  background: linear-gradient(128deg, rgba(255, 255, 255, 0.16), transparent 26%, transparent 68%, rgba(255, 255, 255, 0.04));
  mix-blend-mode: screen;
  opacity: 0.55;
}

.phone img {
  width: 100%;
  height: auto;
  border-radius: 33px;
  background: #0b1114;
  filter: saturate(0.94) contrast(1.035) brightness(0.94);
}

.phone-main {
  width: 304px;
  left: 50%;
  top: 44px;
  z-index: 3;
  transform: translateX(-53%) rotate(-2.6deg);
  animation: float-main 9s ease-in-out infinite;
}

.phone-pad {
  width: 238px;
  right: 0;
  bottom: 2px;
  z-index: 4;
  transform: rotate(6deg);
  animation: float-pad 10s ease-in-out infinite;
}

.phone-pad::before { border-radius: 30px; }
.phone-pad img { border-radius: 30px; }

.pad-play {
  position: absolute;
  right: -18px;
  bottom: 82px;
  z-index: 6;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(201, 162, 90, 0.55);
  border-radius: 50%;
  background: rgba(9, 13, 15, 0.7);
  color: var(--gold-2);
  backdrop-filter: blur(18px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45), 0 0 28px rgba(201, 162, 90, 0.12);
  cursor: pointer;
  transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.pad-play:hover {
  background: rgba(201, 162, 90, 0.18);
  transform: scale(1.06);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45), 0 0 34px rgba(201, 162, 90, 0.22);
}

.float-card {
  position: absolute;
  z-index: 5;
  width: 172px;
  padding: 15px 16px 14px;
  border: 1px solid rgba(201, 162, 90, 0.3);
  border-radius: 14px;
  background: rgba(10, 15, 18, 0.72);
  backdrop-filter: blur(18px) saturate(120%);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.38);
}

.float-kicker {
  display: block;
  color: var(--gold);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.2em;
  margin-bottom: 7px;
}

.float-card strong {
  display: block;
  font-family: var(--serif);
  color: var(--ink);
  font-size: 27px;
  font-weight: 600;
  line-height: 1;
}

.float-card > span:last-child {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.loops-card { left: -12px; top: 72px; animation: float-chip 8s ease-in-out infinite; }
.tuner-card { left: 4px; bottom: 74px; animation: float-chip 9s ease-in-out 1.2s infinite; }

.hero-foot {
  position: relative;
  z-index: 6;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 46px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
  color: var(--muted-2);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* ---------------------------------------------------------------- sections */

.section {
  position: relative;
  padding: 132px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 760px;
}

.section-head .index {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--gold);
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.section-head .kicker { margin-bottom: 18px; }

h2 {
  font-size: clamp(36px, 3.6vw, 54px);
  line-height: 1.22;
  letter-spacing: 0.005em;
}

.section-lead {
  max-width: 640px;
  margin: 24px 0 0;
  color: #aeb9bc;
  font-size: 16px;
  line-height: 1.95;
}

/* ---------------------------------------------------------------- demo video */

.demo {
  background:
    radial-gradient(820px 460px at 50% -6%, rgba(201, 162, 90, 0.1), transparent 72%),
    #070b0d;
}

.demo .section-head { max-width: 700px; }

.demo-frame {
  margin: 56px 0 0;
}

.demo-caption {
  text-align: center;
}

/* ---------------------------------------------------------------- features */

.features {
  background:
    radial-gradient(700px 420px at 16% 30%, rgba(201, 162, 90, 0.06), transparent 70%),
    var(--bg);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin-top: 54px;
}

.feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(16, 24, 28, 0.72);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: transform 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 162, 90, 0.45);
  box-shadow: 0 22px 54px rgba(0, 0, 0, 0.38);
}

.feature-thumb {
  display: block;
  height: 292px;
  overflow: hidden;
  background: #0a0f12;
}

.feature-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.feature-thumb img.thumb-bottom { object-position: center bottom; }

.feature-card:hover .feature-thumb img { transform: scale(1.035); }

.feature-body {
  display: block;
  padding: 15px 15px 17px;
}

.feature-body strong {
  display: block;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.feature-body span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.7;
  letter-spacing: 0.03em;
}

.feature-arrow {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  background: rgba(7, 10, 12, 0.62);
  color: var(--gold-2);
  font-size: 13px;
  backdrop-filter: blur(10px);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: rgba(3, 5, 6, 0.82);
  backdrop-filter: blur(12px);
}

.lightbox.show { display: flex; }

.lightbox-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  width: min(100%, 1000px);
  max-height: 88vh;
  padding: 14px;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background: #0c1216;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.6);
}

.lightbox-inner img {
  width: 100%;
  max-height: 82vh;
  object-fit: contain;
  border-radius: 10px;
  background: #080b0d;
}

.lightbox-copy { align-self: end; padding: 0 6px 8px 0; }
.lightbox-copy h3 {
  margin: 0 0 10px;
  font-size: 24px;
  color: var(--ink);
}
.lightbox-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}
.lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(7, 10, 12, 0.8);
  color: var(--ink);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 1120px) {
  .feature-thumb { height: 260px; }
}

@media (max-width: 920px) {
  .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .feature-thumb { height: 250px; }
  .lightbox-inner { grid-template-columns: 1fr; width: min(100%, 640px); overflow: auto; }
  .lightbox-inner img { max-height: 64vh; }
  .lightbox-copy { order: -1; }
}

@media (max-width: 640px) {
  .features .section-head { max-width: 100%; }
  .feature-grid { grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 38px; }
  .feature-thumb { height: 220px; }
  .feature-body { padding: 12px 12px 14px; }
  .feature-body strong { font-size: 15px; }
  .feature-body span { font-size: 9px; }
  .feature-arrow { top: 9px; right: 9px; width: 24px; height: 24px; font-size: 11px; }
  .lightbox { padding: 14px; }
  .lightbox-inner { padding: 10px; gap: 14px; }
  .lightbox-copy h3 { font-size: 20px; }
}

/* ---------------------------------------------------------------- sound */

.sound {
  background:
    radial-gradient(700px 480px at 76% 40%, rgba(201, 162, 90, 0.075), transparent 70%),
    var(--bg);
}

.sound-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 68px;
  align-items: center;
  margin-top: 64px;
}

.sound-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sound-visual::before {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  top: 8%;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 162, 90, 0.14), transparent 68%);
  filter: blur(10px);
  pointer-events: none;
}

.phone-grid {
  position: relative;
  width: 310px;
  transform: rotate(-3deg);
  z-index: 1;
}

.caption {
  position: relative;
  z-index: 2;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.player-card {
  position: relative;
  padding: 28px 30px 24px;
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.035), transparent 46%),
    rgba(13, 20, 24, 0.82);
  backdrop-filter: blur(18px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

.player-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.player-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.chip {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 9px;
  border: 1px solid rgba(95, 185, 173, 0.28);
  border-radius: 999px;
  color: var(--teal);
  font-size: 9px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  border-bottom: 1px solid var(--line);
}

.tab {
  position: relative;
  padding: 0 0 13px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 160ms ease;
}

.tab:hover { color: var(--ink); }
.tab.is-active { color: var(--gold-2); }

.tab.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--gold);
}

.wave-wrap {
  position: relative;
  margin: 18px 0 0;
}

#waveform {
  display: block;
  width: 100%;
  height: 96px;
  cursor: pointer;
  touch-action: manipulation;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 14px;
}

.play-btn {
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  border: 1px solid rgba(201, 162, 90, 0.5);
  border-radius: 50%;
  background: linear-gradient(145deg, var(--gold-2), var(--gold));
  color: #17110a;
  box-shadow: 0 10px 28px rgba(201, 162, 90, 0.18);
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.play-btn:hover { transform: scale(1.04); box-shadow: 0 12px 32px rgba(201, 162, 90, 0.28); }

.time {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.time .slash { color: var(--muted-2); }

.track-meta {
  min-width: 0;
  margin-left: auto;
  text-align: right;
}

.track-meta span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#track-label { color: var(--ink); font-size: 12px; }
#track-note { margin-top: 4px; color: var(--muted-2); font-size: 10px; letter-spacing: 0.04em; }

.player-hint {
  margin: 18px 0 0;
  color: var(--muted-2);
  font-size: 10px;
  letter-spacing: 0.06em;
}

.spec-row {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin-top: 58px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.spec-row > div {
  min-width: 0;
  padding: 21px 16px 20px;
  border-right: 1px solid var(--line);
}

.spec-row > div:first-child { padding-left: 0; }
.spec-row > div:last-child { border-right: 0; }

.spec-row strong {
  display: block;
  font-family: var(--serif);
  color: var(--ink);
  font-size: 24px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.spec-row span {
  display: block;
  margin-top: 8px;
  color: var(--muted-2);
  font-size: 9px;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.sound-copy {
  max-width: 760px;
  margin: 42px 0 0;
  color: #aeb9bc;
  font-size: 15px;
  line-height: 2;
}

/* ---------------------------------------------------------------- timeline */

.timeline {
  background:
    radial-gradient(620px 460px at 76% 44%, rgba(64, 122, 130, 0.1), transparent 70%),
    #080d10;
}

.timeline-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 74px;
  align-items: center;
  margin-top: 58px;
}

.timeline-copy { min-width: 0; }

.timeline-item {
  display: flex;
  gap: 18px;
  padding: 19px 0 20px;
  border-top: 1px solid var(--line);
}

.timeline-item:last-of-type { border-bottom: 1px solid var(--line); }

.timeline-item > span {
  flex: 0 0 auto;
  padding-top: 4px;
  color: var(--gold);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
}

.timeline-item strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.timeline-item p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.timeline-tags span {
  display: inline-flex;
  align-items: center;
  height: 27px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.timeline-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 660px;
  align-items: center;
}

.timeline-caption { margin-top: 22px; }

.cursor-video {
  max-width: 1000px;
  margin: 58px auto 0;
}

.video-frame {
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 20px;
  background: linear-gradient(145deg, #2c3336 0%, #11171a 55%, #080b0d 100%);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.46);
}

.video-frame video {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  background: #000;
}

.cursor-video .caption {
  margin-top: 18px;
  text-align: center;
}

.timeline-visual::before {
  content: "";
  position: absolute;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(95, 185, 173, 0.09), transparent 68%);
  filter: blur(14px);
}

.phone-timeline {
  position: relative;
  width: 326px;
  transform: rotate(-2deg);
  animation: float-pad 11s ease-in-out infinite;
}

@media (max-width: 1120px) {
  .timeline-grid { gap: 44px; }
  .phone-timeline { width: 294px; }
}

@media (max-width: 920px) {
  .timeline-grid { grid-template-columns: 1fr; gap: 48px; }
  .timeline-visual { order: 2; min-height: 600px; }
}

@media (max-width: 640px) {
  .timeline-grid { margin-top: 40px; gap: 34px; }
  .timeline-item { padding: 16px 0 17px; }
  .timeline-item strong { font-size: 16px; }
  .timeline-item p { font-size: 11px; }
  .timeline-visual { min-height: 520px; }
  .phone-timeline { width: 280px; }
}

/* ---------------------------------------------------------------- device + library */

.device {
  background:
    radial-gradient(720px 500px at 74% 40%, rgba(201, 162, 90, 0.09), transparent 72%),
    #080c0f;
}

.device-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 62px;
  align-items: center;
  margin-top: 60px;
}

.device-visual { min-width: 0; }

.tablet-frame {
  width: 100%;
  max-width: 660px;
  padding: 12px;
  border-radius: 30px;
  background: linear-gradient(145deg, #343b3e 0%, #14191c 38%, #080b0d 100%);
  box-shadow:
    0 38px 90px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  transform: rotate(-1deg);
}

.tablet-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 20px;
  background: #0b1114;
}

.device-visual .caption { margin-top: 24px; }

.device-copy { min-width: 0; }

.device-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.device-features > div {
  min-width: 0;
  padding: 17px 16px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.device-features strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.device-features span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.7;
}

.library-card {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.phone-library {
  position: relative;
  flex: 0 0 auto;
  width: 178px;
  padding: 6px;
  border-radius: 27px;
  transform: rotate(-3deg);
  animation: float-chip 10s ease-in-out infinite;
}

.phone-library::before { inset: 6px; border-radius: 22px; }
.phone-library img { border-radius: 22px; }
.phone-library .glyph { display: none; }

.library-text { min-width: 0; }
.library-text .float-kicker { margin-bottom: 9px; }

.library-text strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.03em;
}

.library-text p {
  margin: 11px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}

@media (max-width: 1120px) {
  .device-grid { gap: 40px; }
}

@media (max-width: 920px) {
  .device-grid { grid-template-columns: 1fr; gap: 44px; }
  .tablet-frame { max-width: 100%; }
  .device-features { max-width: 640px; }
  .library-card { max-width: 640px; }
}

@media (max-width: 640px) {
  .device-grid { margin-top: 40px; gap: 34px; }
  .device-features { grid-template-columns: 1fr; }
  .device-features > div { padding: 15px 14px; }
  .library-card { gap: 18px; margin-top: 22px; padding-top: 22px; }
  .phone-library { width: 146px; }
  .library-text strong { font-size: 19px; }
  .library-text p { font-size: 10px; }
}

/* ---------------------------------------------------------------- tuner */

.tuner {
  background:
    radial-gradient(680px 560px at 78% 42%, rgba(201, 162, 90, 0.11), transparent 72%),
    radial-gradient(600px 500px at 18% 70%, rgba(52, 111, 119, 0.1), transparent 74%),
    linear-gradient(180deg, #080c0f 0%, #0b1114 100%);
}

.tuner-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 76px;
  align-items: center;
  margin-top: 62px;
}

.tuner-copy { min-width: 0; }

.tuner-lead {
  max-width: 520px;
  margin: 0 0 30px;
  color: #c0c9cb;
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.8;
}

.tuner-proof {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.tuner-proof > div {
  padding: 20px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.tuner-proof strong {
  display: block;
  color: var(--gold-2);
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.tuner-proof span {
  display: block;
  margin-top: 9px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.algo-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.algo-list li {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: #b6c0c2;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.algo-list li span {
  color: var(--gold);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
}

.tuner-copy .micro { margin-top: 22px; line-height: 1.9; }

.tuner-visual {
  position: relative;
  display: flex;
  justify-content: center;
  min-height: 680px;
  align-items: center;
}

.phone-tuner {
  position: relative;
  width: 334px;
  transform: rotate(2deg);
  animation: float-main 11s ease-in-out infinite;
}

.tuner-visual::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 162, 90, 0.17), transparent 68%);
  filter: blur(14px);
}

.callout {
  position: absolute;
  z-index: 5;
  padding: 10px 12px;
  border: 1px solid rgba(201, 162, 90, 0.28);
  border-radius: 10px;
  background: rgba(8, 13, 15, 0.78);
  backdrop-filter: blur(16px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.32);
}

.callout strong {
  display: block;
  color: var(--gold-2);
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.callout span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.c1 { top: 82px; left: -12px; }
.c2 { top: 192px; right: -22px; }
.c3 { top: 376px; right: -14px; }
.c4 { bottom: 104px; left: -26px; }

.c1::after, .c2::after, .c3::after, .c4::after {
  content: "";
  position: absolute;
  width: 38px;
  height: 1px;
  background: rgba(201, 162, 90, 0.36);
}

.c1::after { right: -38px; top: 50%; }
.c2::after { left: -38px; top: 50%; }
.c3::after { left: -38px; top: 50%; }
.c4::after { right: -38px; top: 50%; }

/* ---------------------------------------------------------------- chords */

.chords {
  background:
    radial-gradient(640px 460px at 22% 46%, rgba(201, 162, 90, 0.075), transparent 72%),
    #080c0f;
}

.chord-showcase {
  max-width: 1100px;
  margin: 58px auto 0;
}

.chord-wide,
.chord-tile {
  margin: 0;
  min-width: 0;
}

.chord-frame {
  max-width: 100%;
  transform: none;
}

.chord-wide .chord-frame { width: 100%; }

.chord-frame-sm { margin-top: 0; }

.chord-wide figcaption,
.chord-tile figcaption {
  padding: 18px 4px 0;
}

.chord-wide figcaption strong,
.chord-tile figcaption strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.chord-wide figcaption span,
.chord-tile figcaption span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.7;
  letter-spacing: 0.04em;
}

.chord-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 34px;
  align-items: start;
  margin-top: 34px;
}

.panel-frame {
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  background: linear-gradient(145deg, #2c3336 0%, #11171a 55%, #080b0d 100%);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.42);
}

.panel-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
}

.chord-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 50px;
}

.chord-tags span {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.04em;
}

/* ---------------------------------------------------------------- workflow */

.workflow {
  background: var(--bg);
}

.flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 62px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.flow li {
  min-width: 0;
  padding: 24px 22px 0 0;
  border-right: 1px solid var(--line);
}

.flow li:not(:first-child) { padding-left: 22px; }
.flow li:last-child { border-right: 0; }

.flow li > span {
  display: block;
  margin-bottom: 22px;
  color: var(--gold);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
}

.flow strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.flow p {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}

@media (max-width: 1120px) {
  .chord-duo { gap: 24px; }
}

@media (max-width: 920px) {
  .chord-duo { grid-template-columns: 1fr; gap: 38px; }
  .flow { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .flow li:nth-child(3) { border-right: 0; }
  .flow li:nth-child(n + 4) { padding-top: 24px; border-top: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .chord-showcase { margin-top: 40px; }
  .chord-duo { gap: 30px; margin-top: 30px; }
  .chord-tags { margin-top: 36px; }
  .flow { grid-template-columns: 1fr; margin-top: 40px; border-top: 1px solid var(--line); }
  .flow li { padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .flow li:not(:first-child) { padding-left: 0; }
  .flow li:last-child { border-bottom: 0; }
  .flow li > span { margin-bottom: 10px; }
  .flow li:nth-child(n + 4) { border-top: 0; padding-top: 20px; }
}

/* ---------------------------------------------------------------- tech */

.tech {
  background: var(--bg);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 62px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.tech-grid article {
  padding: 28px 26px 34px;
  border-right: 1px solid var(--line);
}

.tech-grid article:first-child { padding-left: 0; }
.tech-grid article:last-child { border-right: 0; }

.tech-num {
  display: block;
  margin-bottom: 28px;
  color: var(--gold);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.12em;
}

.tech-grid h3 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.35;
}

.tech-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}

/* ---------------------------------------------------------------- footer */

.footer {
  padding: 38px 0 46px;
  border-top: 1px solid var(--line);
  background: #06090b;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand img { width: 26px; height: 26px; border-radius: 8px; }
.footer-brand span { font-size: 17px; }

.footer-tag {
  margin: 0;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--muted-2);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.footer-legal a { color: var(--muted); }
.footer-legal a:hover { color: var(--ink); }

/* ---------------------------------------------------------------- reveal / motion */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 800ms cubic-bezier(0.2, 0.7, 0.2, 1), transform 800ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.in { opacity: 1; transform: translateY(0); }

@keyframes float-main {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -9px; }
}

@keyframes float-pad {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 8px; }
}

@keyframes float-chip {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -7px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------------------------------------------------------------- responsive */

@media (max-width: 1120px) {
  .hero-grid { grid-template-columns: 0.95fr 1.05fr; gap: 24px; }
  .hero-visual { height: 630px; }
  .phone-main { width: 274px; }
  .phone-pad { width: 214px; }
  .loops-card { left: -8px; }
  .sound-grid { gap: 42px; }
  .tuner-grid { gap: 44px; }
  .phone-tuner { width: 300px; }
  .c2 { right: -8px; }
  .c4 { left: -10px; }
}

@media (max-width: 920px) {
  .nav-links { display: none; }
  .hero { padding-top: 128px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-copy { max-width: 680px; }
  .hero-visual { height: 640px; width: min(560px, 100%); margin: 0 auto; }
  .hero-foot { margin-top: 24px; }
  .section { padding: 96px 0; }
  .sound-grid { grid-template-columns: 1fr; gap: 52px; }
  .sound-visual { order: 2; }
  .player-card { max-width: 680px; }
  .spec-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .spec-row > div:nth-child(3) { border-right: 0; }
  .spec-row > div:nth-child(-n + 3) { border-bottom: 1px solid var(--line); }
  .spec-row > div:first-child { padding-left: 16px; }
  .tuner-grid { grid-template-columns: 1fr; gap: 56px; }
  .tuner-visual { min-height: 620px; order: 2; }
  .tech-grid { grid-template-columns: 1fr 1fr; }
  .tech-grid article:nth-child(2) { border-right: 0; }
  .tech-grid article:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .tech-grid article:nth-child(3) { padding-left: 0; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .nav { height: 66px; }
  .brand span { font-size: 18px; }
  .brand img { width: 27px; height: 27px; border-radius: 8px; }
  .nav-play { height: 34px; padding: 0 13px; }
  .hero { padding: 112px 0 10px; min-height: auto; }
  h1 { font-size: clamp(36px, 9.2vw, 46px); line-height: 1.2; }
  .lead { margin-top: 20px; font-size: 15px; line-height: 1.85; }
  .hero-actions { margin-top: 28px; }
  .btn { height: 48px; padding: 0 19px; font-size: 12px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .micro { font-size: 10px; line-height: 1.6; }
  .proof { margin-top: 32px; padding-top: 18px; grid-template-columns: 1fr 1fr; row-gap: 17px; }
  .proof > div:nth-child(2) { border-right: 0; }
  .proof > div:nth-child(3) { padding-left: 0; }
  .proof dt { font-size: 22px; }
  .proof dd { font-size: 9px; }
  .hero-visual { height: 520px; width: 100%; margin-top: 6px; }
  .phone-main { width: 218px; top: 28px; }
  .phone-pad { width: 158px; right: -2px; bottom: 10px; }
  .pad-play { width: 46px; height: 46px; right: -10px; bottom: 56px; }
  .float-card { width: 132px; padding: 11px 12px 10px; border-radius: 11px; }
  .float-card strong { font-size: 21px; }
  .float-card > span:last-child { font-size: 8px; }
  .float-kicker { font-size: 7px; }
  .loops-card { left: 0; top: 58px; }
  .tuner-card { left: 4px; bottom: 26px; }
  .hero-foot { margin-top: 26px; font-size: 8px; letter-spacing: 0.1em; }
  .hero-foot span:nth-child(2) { display: none; }
  .section { padding: 76px 0; }
  .section-head .index { margin-bottom: 18px; }
  h2 { font-size: clamp(34px, 9.2vw, 44px); line-height: 1.25; }
  .section-lead { margin-top: 19px; font-size: 14px; line-height: 1.9; }
  .sound-grid { margin-top: 40px; }
  .sound-visual { order: 2; }
  .phone-grid { width: 250px; }
  .caption { margin-top: 18px; font-size: 9px; }
  .player-card { padding: 20px 18px 18px; border-radius: 17px; }
  .player-head { margin-bottom: 14px; }
  .player-title { font-size: 16px; }
  .chip { font-size: 8px; height: 22px; }
  .tabs { gap: 15px; }
  .tab { font-size: 11px; padding-bottom: 11px; }
  #waveform { height: 78px; }
  .play-btn { width: 46px; height: 46px; }
  .player-controls { gap: 11px; }
  .time { font-size: 10px; }
  .track-meta { max-width: 120px; }
  #track-label { font-size: 11px; }
  #track-note { font-size: 9px; }
  .player-hint { margin-top: 13px; font-size: 9px; }
  .spec-row { grid-template-columns: 1fr 1fr; margin-top: 42px; }
  .spec-row > div { padding: 17px 12px; }
  .spec-row > div:nth-child(2n) { border-right: 0; }
  .spec-row > div:nth-child(-n + 4) { border-bottom: 1px solid var(--line); }
  .spec-row > div:first-child { padding-left: 12px; }
  .spec-row > div:nth-child(2) { border-right: 0; }
  .spec-row strong { font-size: 21px; }
  .spec-row span { font-size: 8px; }
  .sound-copy { margin-top: 30px; font-size: 13px; line-height: 1.95; }
  .tuner-grid { margin-top: 40px; gap: 38px; }
  .tuner-lead { font-size: 18px; line-height: 1.8; }
  .tuner-proof > div { padding: 16px 14px; }
  .tuner-proof strong { font-size: 23px; }
  .tuner-proof span { font-size: 9px; }
  .algo-list li { font-size: 12px; padding: 11px 0; }
  .tuner-visual { min-height: 520px; }
  .phone-tuner { width: 280px; }
  .callout { display: none; }
  .tech-grid { grid-template-columns: 1fr; margin-top: 40px; }
  .tech-grid article { padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .tech-grid article:last-child { border-bottom: 0; }
  .tech-grid article:nth-child(3) { padding-left: 0; }
  .tech-num { margin-bottom: 18px; }
  .tech-grid h3 { font-size: 19px; }
  .footer { padding: 30px 0 38px; }
  .footer-inner { align-items: flex-start; gap: 16px; }
  .footer-tag { display: none; }
  .footer-legal { gap: 10px 14px; font-size: 8px; }
}

/* ── 下载占位（2026-10-30）：按钮先占位，APK 未挂 ───────────── */
.download-slot { margin-top: 18px; }
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  background: linear-gradient(135deg, #d9a441, #b8802a);
  color: #1b1206;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 10px 26px rgba(216, 165, 65, .28);
}
.btn-download[aria-disabled="true"] { cursor: default; opacity: .92; }
.download-note {
  margin-top: 10px;
  max-width: 46ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim, #9aa6ad);
}

/* ── 下载条：独立置顶，不与试听区混排（2026-10-30）────────────── */
.download-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 16px;
  margin-bottom: 26px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}
.download-bar-copy { display: flex; flex-direction: column; gap: 4px; flex: 1 1 auto; min-width: 0; }
.download-bar-inner { flex-wrap: nowrap; }
.download-bar .btn-download { flex: 0 0 auto; white-space: nowrap; }
.download-bar-copy strong { font-size: 15px; color: var(--ink, #f3f0ea); }
.download-bar-copy span { font-size: 12.5px; color: var(--text-dim, #9aa6ad); }
@media (max-width: 640px) {
  .download-bar-inner { flex-direction: column; align-items: stretch; gap: 12px; }
  .download-bar .btn-download { justify-content: center; }
}

/* ── 首页入口抓图（2026-10-30）────────────────────────────────── */
.entry-shot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin: 4px 0 40px;
}
.entry-shot img {
  width: min(330px, 76vw);
  height: auto;
  border-radius: 26px;
  border: 1px solid var(--line, rgba(255,255,255,.10));
  box-shadow: 0 26px 60px rgba(0,0,0,.45);
}
.entry-shot figcaption { display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center; }
.entry-shot figcaption strong { font-size: 15px; color: var(--ink, #f3f0ea); }
.entry-shot figcaption span { font-size: 12.5px; color: var(--text-dim, #9aa6ad); }

/* ── 子页面页头（资源页 / 隐私政策）────────────────────────────
   这两页原来用的是 .site-header，但样式表里只有首页的 .nav，
   于是页头变成顶部一行没内边距的裸链接。这里补一条：粘顶 + 毛玻璃。 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(7, 10, 12, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px) saturate(120%);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}
.site-header .nav-links { margin-right: 0; }

/* ── 隐私政策页（2026-10-31）───────────────────────────────── */

/* 正文字体子集只覆盖本页标题用字（源：Noto Serif CJK SC Bold，
   与站内思源宋体同源）；标题字形因此全页一致，不会混进系统字体。 */
@font-face {
  font-family: "XianGe Serif Legal";
  src: url("assets/fonts/serif-legal.woff2") format("woff2");
  font-weight: 600 700;
  font-style: normal;
  font-display: swap;
}

.legal-page h2,
.legal h3 {
  font-family: "XianGe Serif Legal", var(--serif);
}

.legal-lead {
  max-width: 780px;
  margin: 30px 0 0;
  color: #aeb9bc;
  font-size: 15px;
  line-height: 1.95;
}

.legal {
  max-width: 780px;
  margin-top: 4px;
  color: #b3bec1;
  font-size: 14.5px;
  line-height: 1.95;
}

.legal h3 {
  margin: 40px 0 12px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.legal p { margin: 0 0 12px; }

.legal ul {
  margin: 0 0 14px;
  padding-left: 20px;
}

.legal li { margin: 0 0 9px; }

.legal strong {
  color: var(--ink);
  font-weight: 600;
}

@media (max-width: 640px) {
  .legal { font-size: 13.5px; }
  .legal h3 { margin-top: 30px; font-size: 17px; }
}

/* ── 首页「关于歌谱来源」说明（2026-10-31）────────────────────
   用户要求写清楚"不随包附带歌谱"，避免"万首谱库"被读成内置资源。 */
.library-note {
  max-width: 760px;
  margin: 46px auto 0;
  padding: 18px 20px;
  border: 1px solid var(--line-strong, rgba(255, 255, 255, 0.12));
  border-left: 3px solid var(--gold, #c9a25a);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  color: #9fabb0;
  font-size: 13px;
  line-height: 1.9;
}

.library-note strong { color: var(--ink, #f3f0ea); font-weight: 600; }

@media (max-width: 640px) {
  .library-note { margin-top: 34px; padding: 15px 16px; font-size: 12.5px; }
}