/* =========================================================
   uwave — Design System
   Moonlight White · Soft Natural Light · Minimal Technology
   ========================================================= */

:root {
  /* Color system */
  --moon: #F7F6F2;        /* Primary background */
  --mist: #E8EAED;        /* Secondary background */
  --ink: #20242A;         /* Text */
  --silver: #C8CDD6;      /* Accent / soft silver */
  --champagne: #C8B27A;   /* Premium highlight */
  --champagne-soft: #D9CBA6;
  --ink-soft: #565B63;    /* Secondary text */
  --line: #E2E0DA;        /* Hairline */

  /* Typography */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  /* Spacing */
  --section-pad: 140px;
  --radius-card: 24px;
  --radius-btn: 26px;
  --shadow-soft: 0 10px 40px rgba(32, 36, 42, 0.06);
  --shadow-lift: 0 24px 60px rgba(32, 36, 42, 0.10);

  --maxw: 1180px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--moon);
  color: var(--ink);
  font-size: 18px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 400; letter-spacing: -0.02em; line-height: 1.12; }
p { margin: 0; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
.section { padding: var(--section-pad) 0; }
.section--tight { padding: 96px 0; }

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--champagne);
  font-weight: 600;
  margin-bottom: 22px;
}
.section-title {
  font-size: clamp(34px, 5vw, 56px);
  max-width: 760px;
}
.section-lead {
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 620px;
  margin-top: 22px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 30px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .35s cubic-bezier(.2,.8,.2,1), background .3s, box-shadow .3s, color .3s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--moon);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(32,36,42,.22); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--silver);
}
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-champagne { background: var(--champagne); color: #3a3322; }
.btn-champagne:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(200,178,122,.4); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Navigation ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 32px;
  background: rgba(247,246,242,0.72);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-color: var(--line); }
.nav__brand {
  font-size: 20px; font-weight: 600; letter-spacing: 0.04em;
  display: flex; align-items: center; gap: 9px;
}
.nav__brand .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--champagne);
  box-shadow: 0 0 0 4px rgba(200,178,122,.18);
}
.nav__links { display: flex; align-items: center; gap: 34px; }
.nav__links a { font-size: 15px; color: var(--ink-soft); transition: color .25s; }
.nav__links a:hover { color: var(--ink); }
.nav__cta { height: 44px; padding: 0 22px; border-radius: 22px; font-size: 15px; }
.nav__burger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav__burger span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 4px 0; transition: .3s; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s ease, transform .9s cubic-bezier(.2,.8,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }

/* =========================================================
   HOMEPAGE
   ========================================================= */

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding-top: 90px;
  overflow: hidden;
  background:
    radial-gradient(120% 80% at 78% 18%, rgba(200,178,122,.12), transparent 60%),
    radial-gradient(90% 70% at 10% 90%, rgba(232,234,237,.7), transparent 55%),
    var(--moon);
}
.hero__grid {
  display: grid; grid-template-columns: 1.05fr 1fr;
  gap: 40px; align-items: center; width: 100%;
}
.hero__title { font-size: clamp(48px, 7vw, 80px); font-weight: 300; }
.hero__title em { font-style: normal; font-weight: 500; color: var(--champagne); }
.hero__lead { font-size: 20px; color: var(--ink-soft); max-width: 460px; margin: 26px 0 36px; }
.hero__visual {
  position: relative; display: flex; justify-content: center; align-items: center;
}
.hero__visual img {
  width: 100%; max-width: 480px;
  filter: drop-shadow(0 40px 60px rgba(32,36,42,.12));
  animation: floaty 7s ease-in-out infinite;
}
.hero__ring {
  position: absolute; width: 120%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, rgba(200,178,122,.10), transparent 62%);
  z-index: -1;
}
.scroll-hint {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
  font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-soft);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.scroll-hint .line { width: 1px; height: 38px; background: linear-gradient(var(--silver), transparent); }

@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-16px); } }

/* Belief / pillars */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 64px; }
.pillar {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 38px 34px; box-shadow: var(--shadow-soft);
  transition: transform .4s, box-shadow .4s;
}
.pillar:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); }
.pillar__icon {
  width: 52px; height: 52px; border-radius: 16px; background: var(--mist);
  display: grid; place-items: center; margin-bottom: 22px; color: var(--ink);
}
.pillar h3 { font-size: 22px; margin-bottom: 12px; }
.pillar p { color: var(--ink-soft); font-size: 16px; }

/* Three-layer info structure */
.layers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 56px; border-radius: var(--radius-card); overflow: hidden; border: 1px solid var(--line); }
.layer { padding: 44px 38px; background: #fff; }
.layer + .layer { border-left: 1px solid var(--line); }
.layer .tag { font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--champagne); font-weight: 600; }
.layer h3 { font-size: 26px; margin: 16px 0 14px; }
.layer p { color: var(--ink-soft); font-size: 16px; }
.layer .kw { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.layer .kw span { font-size: 13px; color: var(--ink-soft); background: var(--mist); padding: 6px 12px; border-radius: 20px; }

/* Featured product card */
.feature {
  margin-top: 70px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border-radius: 32px; overflow: hidden; background: #fff; border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}
.feature__media { position: relative; background: linear-gradient(160deg, var(--mist), #fff); display: grid; place-items: center; padding: 50px; }
.feature__media img { max-width: 360px; animation: floaty 8s ease-in-out infinite; }
.feature__body { padding: 64px 56px; display: flex; flex-direction: column; justify-content: center; }
.feature__body h2 { font-size: 40px; }
.feature__body p { color: var(--ink-soft); margin: 18px 0 30px; max-width: 420px; }

/* Trust stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 56px; }
.stat { text-align: center; }
.stat .num { font-size: 46px; font-weight: 300; color: var(--ink); }
.stat .num em { font-style: normal; color: var(--champagne); }
.stat .lbl { font-size: 14px; color: var(--ink-soft); margin-top: 6px; }

/* Home CTA */
.home-cta { text-align: center; }
.home-cta h2 { font-size: clamp(34px, 5vw, 60px); font-weight: 300; }
.home-cta p { color: var(--ink-soft); margin: 20px auto 34px; max-width: 520px; }

/* =========================================================
   PRODUCT PAGE
   ========================================================= */

/* Section 01 — Hero split */
.phero { padding-top: 150px; padding-bottom: 110px; }
.phero__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.phero__name { font-size: 15px; letter-spacing: .24em; text-transform: uppercase; color: var(--champagne); font-weight: 600; }
.phero__title { font-size: clamp(46px, 6.5vw, 76px); font-weight: 300; margin: 18px 0 24px; }
.phero__desc { font-size: 19px; color: var(--ink-soft); max-width: 460px; margin-bottom: 36px; }
.phero__media { position: relative; display: grid; place-items: center; }
.phero__media img { max-width: 460px; filter: drop-shadow(0 40px 70px rgba(32,36,42,.14)); animation: floaty 8s ease-in-out infinite; }
.phero__badge {
  position: absolute; bottom: 8%; left: 0;
  background: rgba(255,255,255,.8); backdrop-filter: blur(8px);
  border: 1px solid var(--line); border-radius: 18px; padding: 14px 18px;
  font-size: 14px; color: var(--ink-soft); box-shadow: var(--shadow-soft);
  display: flex; align-items: center; gap: 10px;
}
.phero__badge b { color: var(--ink); font-weight: 600; }

/* Section 02 — Experience cards */
.exp-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 60px; }
.exp {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-card);
  overflow: hidden; box-shadow: var(--shadow-soft); transition: transform .4s, box-shadow .4s;
}
.exp:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); }
.exp__img { aspect-ratio: 4/3; overflow: hidden; background: var(--mist); }
.exp__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.exp:hover .exp__img img { transform: scale(1.05); }
.exp__body { padding: 30px 30px 34px; }
.exp__body .idx { font-size: 13px; color: var(--champagne); font-weight: 600; letter-spacing: .1em; }
.exp__body h3 { font-size: 24px; margin: 10px 0 10px; }
.exp__body p { color: var(--ink-soft); font-size: 16px; }

/* Section 03 — Why uwave icon cards */
.why-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 60px; }
.why {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 38px 30px; box-shadow: var(--shadow-soft); transition: transform .4s;
}
.why:hover { transform: translateY(-5px); }
.why__icon {
  width: 56px; height: 56px; border-radius: 18px; background: var(--mist);
  display: grid; place-items: center; color: var(--ink); margin-bottom: 22px;
}
.why h3 { font-size: 21px; margin-bottom: 10px; }
.why p { color: var(--ink-soft); font-size: 15.5px; }

/* Section 04 — Technology explanation */
.tech-block {
  display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center;
  margin-top: 70px;
}
.tech-block:nth-child(even) .tech__visual { order: 2; }
.tech__num { font-size: 14px; color: var(--champagne); font-weight: 600; letter-spacing: .15em; }
.tech__text h3 { font-size: 32px; margin: 12px 0 16px; }
.tech__text p { color: var(--ink-soft); max-width: 460px; }
.tech__visual {
  background: linear-gradient(160deg, var(--mist), #fff);
  border: 1px solid var(--line); border-radius: var(--radius-card);
  aspect-ratio: 5/4; display: grid; place-items: center; overflow: hidden;
  box-shadow: var(--shadow-soft);
}

/* Sound wave SVG animation */
.wave-svg { width: 80%; height: auto; }
.wave-path { fill: none; stroke: var(--ink); stroke-width: 2; opacity: .55; }
.wave-path.c { stroke: var(--champagne); opacity: .9; }
@keyframes waveShift { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.wave-anim { animation: waveShift 6s linear infinite; }

/* Brainwave bars */
.brain { display: flex; align-items: flex-end; gap: 6px; height: 120px; }
.brain span { width: 10px; background: linear-gradient(var(--champagne), var(--silver)); border-radius: 6px; animation: brainPulse 2.4s ease-in-out infinite; }
@keyframes brainPulse { 0%,100% { transform: scaleY(.4); } 50% { transform: scaleY(1); } }

/* Ergo rings */
.ergo { position: relative; width: 200px; height: 200px; }
.ergo .ring { position: absolute; inset: 0; border: 1.5px solid var(--silver); border-radius: 50%; }
.ergo .ring.r2 { inset: 26px; border-color: var(--champagne); }
.ergo .ring.r3 { inset: 52px; border-color: var(--mist); }
.ergo .core { position: absolute; inset: 70px; border-radius: 50%; background: radial-gradient(circle, #fff, var(--mist)); box-shadow: var(--shadow-soft); }

/* Section 05 — How it works */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 60px; counter-reset: step; }
.step { text-align: center; position: relative; padding: 0 8px; }
.step__dot {
  width: 92px; height: 92px; margin: 0 auto 22px; border-radius: 50%;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-soft);
  display: grid; place-items: center; font-size: 26px; color: var(--champagne); font-weight: 600;
  position: relative;
}
.step__dot::after {
  counter-increment: step; content: counter(step);
  position: absolute; top: -6px; right: -6px; width: 30px; height: 30px;
  background: var(--ink); color: #fff; border-radius: 50%; font-size: 14px;
  display: grid; place-items: center;
}
.step h3 { font-size: 20px; margin-bottom: 8px; }
.step p { color: var(--ink-soft); font-size: 15px; }
.step__arrow { display: none; }

/* Section 06 — Sound experience module */
.sound {
  position: relative; text-align: center; border-radius: 36px; overflow: hidden;
  padding: 110px 32px; margin-top: 40px;
  background: linear-gradient(160deg, #fff, var(--mist) 70%, rgba(200,178,122,.16));
  border: 1px solid var(--line);
}
.sound__waves { position: absolute; inset: 0; z-index: 0; opacity: .5; pointer-events: none; }
.sound__inner { position: relative; z-index: 1; }
.sound h2 { font-size: clamp(32px, 5vw, 52px); font-weight: 300; }
.sound .section-lead { margin: 18px auto 0; }
.player {
  margin: 46px auto 0; width: 168px; height: 168px; border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, #fff, var(--mist));
  border: 1px solid var(--line); box-shadow: var(--shadow-lift);
  display: grid; place-items: center; cursor: pointer; position: relative;
  transition: transform .3s;
}
.player:hover { transform: scale(1.03); }
.player.playing { animation: breathe 4.5s ease-in-out infinite; }
.player__icon { width: 46px; height: 46px; color: var(--ink); }
.player__pulse {
  position: absolute; inset: -10px; border-radius: 50%; border: 1px solid var(--champagne);
  opacity: 0;
}
.player.playing .player__pulse { animation: pulseOut 4.5s ease-out infinite; }
@keyframes breathe { 0%,100% { transform: scale(1); } 50% { transform: scale(1.05); } }
@keyframes pulseOut { 0% { transform: scale(1); opacity: .5; } 100% { transform: scale(1.4); opacity: 0; } }
.sound__cats { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 40px; }
.cat {
  display: inline-flex; flex-direction: column; align-items: center; gap: 2px; line-height: 1.2;
  padding: 12px 22px; border-radius: 30px; border: 1px solid var(--silver);
  background: rgba(255,255,255,.7); font-size: 15px; color: var(--ink-soft); cursor: pointer;
  transition: all .3s;
}
.cat span { font-size: 11px; letter-spacing: .08em; opacity: .7; }
.cat:hover { color: var(--ink); border-color: var(--ink); }
.cat.active { background: var(--ink); color: var(--moon); border-color: var(--ink); }
.now-playing { margin-top: 26px; font-size: 14px; color: var(--ink-soft); letter-spacing: .04em; min-height: 20px; }

/* Section 07 — Spec table */
.spec { margin-top: 56px; border-top: 1px solid var(--line); }
.spec__row {
  display: grid; grid-template-columns: 240px 1fr; gap: 24px;
  padding: 26px 4px; border-bottom: 1px solid var(--line); align-items: baseline;
}
.spec__row dt { font-size: 16px; color: var(--ink); font-weight: 600; }
.spec__row dd { margin: 0; color: var(--ink-soft); font-size: 16.5px; }

/* Section 08 — Comparison */
.compare { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; margin-top: 60px; align-items: stretch; }
.compare__col { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-card); padding: 42px 38px; }
.compare__col.is-uwave { background: var(--ink); color: var(--moon); border-color: var(--ink); position: relative; }
.compare__col.is-uwave .c-head { color: var(--champagne); }
.compare__col.is-uwave li { color: rgba(247,246,242,.82); }
.c-head { font-size: 14px; letter-spacing: .14em; text-transform: uppercase; font-weight: 600; margin-bottom: 26px; }
.compare ul { list-style: none; margin: 0; padding: 0; }
.compare li { padding: 16px 0; border-top: 1px solid var(--line); font-size: 16.5px; display: flex; gap: 12px; align-items: flex-start; }
.compare__col.is-uwave li { border-color: rgba(255,255,255,.12); }
.compare li .mk { color: var(--champagne); font-weight: 700; flex: 0 0 auto; }
.compare__vs { display: grid; place-items: center; padding: 0 22px; font-size: 13px; letter-spacing: .2em; color: var(--ink-soft); font-weight: 600; }

/* Section 09 — Reviews */
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 60px; }
.review { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-card); padding: 36px 32px; box-shadow: var(--shadow-soft); display: flex; flex-direction: column; }
.review__quote { font-size: 18px; line-height: 1.55; color: var(--ink); }
.review__cat { display: inline-block; margin-top: 20px; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--champagne); font-weight: 600; }
.review__person { display: flex; align-items: center; gap: 14px; margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }
.review__avatar { width: 46px; height: 46px; border-radius: 50%; background: var(--mist); display: grid; place-items: center; font-weight: 600; color: var(--ink); font-size: 16px; }
.review__person .nm { font-size: 15px; font-weight: 600; }
.review__person .sc { font-size: 13.5px; color: var(--ink-soft); }
.review__story { margin-top: 18px; font-size: 15px; color: var(--ink-soft); line-height: 1.6; }

/* Section 10 — FAQ */
.faq { margin-top: 56px; border-top: 1px solid var(--line); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 28px 4px; font-size: 20px; color: var(--ink); font-family: var(--font);
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
}
.faq__q .ic { flex: 0 0 auto; width: 26px; height: 26px; position: relative; transition: transform .35s; }
.faq__q .ic::before, .faq__q .ic::after { content: ""; position: absolute; background: var(--ink); border-radius: 2px; }
.faq__q .ic::before { top: 12px; left: 4px; right: 4px; height: 2px; }
.faq__q .ic::after { left: 12px; top: 4px; bottom: 4px; width: 2px; transition: opacity .35s; }
.faq__item.open .ic { transform: rotate(180deg); }
.faq__item.open .ic::after { opacity: 0; }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .45s ease; }
.faq__a p { padding: 0 4px 28px; color: var(--ink-soft); max-width: 760px; font-size: 16.5px; }

/* Section 11 — Final CTA */
.final-cta { text-align: center; background: var(--moon); }
.final-cta h2 { font-size: clamp(36px, 6vw, 64px); font-weight: 300; }
.final-cta p { color: var(--ink-soft); margin: 20px auto 36px; max-width: 480px; }

/* ---------- Footer ---------- */
.footer { background: #fff; border-top: 1px solid var(--line); padding: 70px 0 40px; }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
.footer__brand { font-size: 22px; font-weight: 600; letter-spacing: .04em; display: flex; align-items: center; gap: 9px; }
.footer__brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--champagne); }
.footer__tag { color: var(--ink-soft); font-size: 15px; margin-top: 16px; max-width: 280px; }
.footer h4 { font-size: 14px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 18px; font-weight: 600; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 12px; }
.footer li a { color: var(--ink-soft); font-size: 15px; transition: color .25s; }
.footer li a:hover { color: var(--ink); }
.footer__bottom { margin-top: 50px; padding-top: 26px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--ink-soft); font-size: 13.5px; }

/* ICP 备案号 —— 内联于版权行，与 footer 文案同字号同色，不单独成块 */
.footer__sep { color: var(--silver); margin: 0 2px; }
.footer__bottom a { color: inherit; text-decoration: none; transition: color .25s; }
.footer__bottom a:hover { color: var(--champagne); }

/* 深色声场页备案号 —— 跟随正文末行，极弱化 */
.space__beian { margin-top: 20px; font-size: 12.5px; letter-spacing: .04em; color: rgba(247,246,242,.35); }
.space__beian a { color: inherit; text-decoration: none; transition: color .25s; }
.space__beian a:hover { color: rgba(200,178,122,.9); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 980px) {
  :root { --section-pad: 100px; }
  .hero__grid, .phero__grid, .feature, .tech-block, .tech-block:nth-child(even) .tech__visual { grid-template-columns: 1fr; }
  .tech-block:nth-child(even) .tech__visual { order: 0; }
  .pillars, .why-cards, .exp-cards, .reviews, .layers, .steps { grid-template-columns: 1fr 1fr; }
  .layer + .layer { border-left: none; border-top: 1px solid var(--line); }
  .stats { grid-template-columns: 1fr 1fr; }
  .compare { grid-template-columns: 1fr; }
  .compare__vs { padding: 14px 0; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .nav__links { display: none; }
  .nav__burger { display: block; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .container { padding: 0 22px; }
  :root { --section-pad: 80px; }
  .pillars, .why-cards, .exp-cards, .reviews, .layers, .steps, .stats { grid-template-columns: 1fr; }
  .hero__title { font-size: 44px; }
  .spec__row { grid-template-columns: 1fr; gap: 6px; }
  .footer__grid { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .btn-row { flex-direction: column; }
  .phero { padding-top: 120px; }
  .sound { padding: 70px 22px; }
}

/* Mobile menu open */
.mobile-menu {
  position: fixed; inset: 64px 0 0; background: var(--moon); z-index: 99;
  display: none; flex-direction: column; padding: 30px 32px; gap: 6px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.mobile-menu .btn { margin-top: 18px; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   NIGHT HERO (homepage opener)
   ========================================================= */
.hero--night {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding-top: 90px; overflow: hidden; color: var(--moon);
  background:
    radial-gradient(70% 55% at 82% 18%, rgba(200,178,122,.20), transparent 60%),
    radial-gradient(90% 80% at 8% 100%, rgba(34,40,52,.95), transparent 60%),
    linear-gradient(155deg, #171a21 0%, #23272f 55%, #2b271f 100%);
}
.hero--night .hero__grid { align-items: center; }
.hero--night .hero__title { color: var(--moon); font-weight: 300; }
.hero--night .hero__cn { font-size: 22px; letter-spacing: .34em; color: var(--champagne); margin: 20px 0 24px; font-weight: 400; }
.hero--night .hero__lead { color: rgba(247,246,242,.72); }
.hero--night .btn-ghost { color: var(--moon); border-color: rgba(247,246,242,.34); }
.hero--night .btn-ghost:hover { border-color: var(--moon); }
.hero--night .hero__visual img { filter: drop-shadow(0 40px 70px rgba(0,0,0,.5)); border-radius: 22px; }
.hero--night .scroll-hint { color: rgba(247,246,242,.6); }
.hero--night .scroll-hint .line { background: linear-gradient(rgba(247,246,242,.5), transparent); }

/* Hero 星云画布 —— 引擎渲染层，纯装饰，不拦截交互 */
.hero__nebula {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.6s ease .15s;
}
.hero__nebula.is-ready { opacity: 1; }

/* picture 仅作 WebP 容器，不参与布局，避免影响原有图片样式 */
picture { display: contents; }
.hero--night .container,
.hero--night .scroll-hint { position: relative; z-index: 2; }

/* =========================================================
   INNER PAGE HEADER
   ========================================================= */
.page-head { padding: 150px 0 56px; }
.page-head .eyebrow { margin-bottom: 18px; }
.page-head h1 { font-size: clamp(40px, 6vw, 68px); font-weight: 300; }
.page-head p { color: var(--ink-soft); margin-top: 20px; max-width: 660px; font-size: 19px; }

.crumb { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 26px; }
.crumb a { color: var(--ink-soft); }
.crumb a:hover { color: var(--ink); }
.crumb span { color: var(--champagne); margin: 0 8px; }

.prose { max-width: 760px; }
.prose h2 { font-size: 30px; margin: 48px 0 16px; font-weight: 400; }
.prose h3 { font-size: 22px; margin: 34px 0 12px; font-weight: 500; }
.prose p { color: var(--ink-soft); margin-bottom: 18px; font-size: 17.5px; }
.prose ul { color: var(--ink-soft); font-size: 17.5px; padding-left: 20px; }
.prose li { margin-bottom: 10px; }
.card-link {
  display: block; padding: 34px 32px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius-card); box-shadow: var(--shadow-soft); transition: transform .35s, box-shadow .35s;
}
.card-link:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); }
.card-link .k { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--champagne); font-weight: 600; }
.card-link h3 { font-size: 24px; margin: 12px 0 10px; font-weight: 400; }
.card-link p { color: var(--ink-soft); font-size: 15.5px; }
.card-link .arrow { margin-top: 16px; color: var(--ink); font-size: 15px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; margin-top: 50px; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; margin-top: 50px; }

.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 0; margin-top: 50px; }
.flow__step { flex: 1 1 160px; text-align: center; padding: 30px 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-card); }
.flow__step .n { font-size: 13px; color: var(--champagne); font-weight: 600; letter-spacing: .1em; }
.flow__step h3 { font-size: 20px; margin-top: 10px; font-weight: 400; }
.flow__arrow { flex: 0 0 44px; text-align: center; color: var(--silver); font-size: 22px; }

.cycle { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; margin-top: 50px; }
.cycle__stage { background: linear-gradient(160deg, var(--mist), #fff); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 36px 30px; }
.cycle__stage .ph { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--champagne); font-weight: 600; }
.cycle__stage h3 { font-size: 24px; margin: 10px 0 12px; font-weight: 400; }
.cycle__stage p { color: var(--ink-soft); font-size: 15.5px; }

/* =========================================================
   SOUND SPACE — dark digital healing environment
   ========================================================= */
.space {
  position: relative; min-height: 100vh; display: grid; place-items: center; text-align: center;
  overflow: hidden; color: var(--moon); padding: 130px 24px;
  background:
    radial-gradient(60% 50% at 50% 38%, rgba(200,178,122,.18), transparent 60%),
    radial-gradient(80% 70% at 18% 92%, rgba(64,86,120,.26), transparent 60%),
    radial-gradient(70% 60% at 86% 14%, rgba(126,92,146,.20), transparent 60%),
    linear-gradient(160deg, #0e1015 0%, #161922 58%, #1d1a15 100%);
}
.space__nebula { position: absolute; inset: -12%; filter: blur(50px); opacity: .7; pointer-events: none;
  background:
    radial-gradient(40% 40% at 30% 40%, rgba(200,178,122,.30), transparent 60%),
    radial-gradient(35% 35% at 70% 60%, rgba(90,120,160,.30), transparent 60%),
    radial-gradient(30% 30% at 55% 80%, rgba(150,110,170,.25), transparent 60%);
  animation: drift 26s ease-in-out infinite;
}
@keyframes drift { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(2%,-3%) scale(1.06); } }
.space__ripples { position: absolute; left: 50%; top: 46%; transform: translate(-50%,-50%); width: min(120vw, 880px); aspect-ratio: 1; pointer-events: none; }
.space__ripples span { position: absolute; inset: 0; border: 1px solid rgba(200,178,122,.28); border-radius: 50%; animation: ripple 9s ease-out infinite; }
.space__ripples span:nth-child(2) { animation-delay: 3s; }
.space__ripples span:nth-child(3) { animation-delay: 6s; }
@keyframes ripple { 0% { transform: scale(.18); opacity: .8; } 100% { transform: scale(1); opacity: 0; } }
.space__inner { position: relative; z-index: 1; max-width: 720px; }
.space .eyebrow { color: var(--champagne); }
.space h1 { font-size: clamp(36px, 6vw, 66px); font-weight: 300; }
.space .section-lead { color: rgba(247,246,242,.72); margin-left: auto; margin-right: auto; }
.space .player {
  background: radial-gradient(circle at 50% 38%, #2b2f39, #121419);
  border-color: rgba(247,246,242,.16); box-shadow: 0 0 80px rgba(200,178,122,.30);
}
.space .player__icon { color: var(--moon); }
.space .player.playing { animation: breathe 4.5s ease-in-out infinite; }
.space .player .player__pulse { border-color: rgba(200,178,122,.6); }
.space .cat { background: rgba(247,246,242,.06); border-color: rgba(247,246,242,.18); color: rgba(247,246,242,.8); }
.space .cat:hover { color: var(--moon); border-color: rgba(247,246,242,.5); }
.space .cat.active { background: var(--champagne); color: #2a2418; border-color: var(--champagne); }
.space .now-playing { color: rgba(247,246,242,.6); }
.space__back { position: absolute; top: 26px; left: 32px; z-index: 2; color: rgba(247,246,242,.7); font-size: 14px; letter-spacing: .08em; }
.space__back:hover { color: var(--moon); }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; margin-top: 50px; align-items: start; }
.contact-form label { display: block; font-size: 14px; color: var(--ink-soft); margin: 18px 0 8px; }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px;
  font-family: var(--font); font-size: 16px; background: #fff; color: var(--ink);
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--champagne); }
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li { padding: 18px 0; border-bottom: 1px solid var(--line); }
.info-list .t { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--champagne); font-weight: 600; }
.info-list .v { font-size: 17px; margin-top: 6px; }

@media (max-width: 880px) {
  .grid-3, .grid-2, .cycle { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .flow { flex-direction: column; }
  .flow__arrow { transform: rotate(90deg); flex-basis: 30px; }
}

/* =========================================================
   PRODUCT PAGE — story / scenarios / tech breakdown
   ========================================================= */
.story__quote { font-size: clamp(34px, 5vw, 60px); font-weight: 300; line-height: 1.16; letter-spacing: -.01em; }
.story__cn { font-size: 20px; color: var(--champagne); margin-top: 20px; letter-spacing: .1em; }

.scn-img { border-radius: 18px; overflow: hidden; margin-bottom: 18px; aspect-ratio: 16/11; background: var(--mist); }
.scn-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.card-link:hover .scn-img img { transform: scale(1.04); }

.tech__text .k { display: inline-block; font-size: 13px; letter-spacing: .14em; color: var(--champagne); font-weight: 600; margin-bottom: 6px; }
.tech__list { list-style: none; padding: 0; margin: 18px 0 0; }
.tech__list li { padding: 13px 0 13px 26px; position: relative; color: var(--ink-soft); border-bottom: 1px solid var(--line); font-size: 16.5px; }
.tech__list li:before { content: ""; position: absolute; left: 0; top: 22px; width: 8px; height: 8px; border-radius: 50%; background: var(--champagne); }
.tech__list strong { color: var(--ink); font-weight: 500; }

.comfort-ring { position: relative; height: 180px; display: flex; align-items: center; justify-content: center; }
.comfort-ring span { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); border: 1px solid var(--silver); border-radius: 50%; }
.comfort-ring span:nth-child(1){ width: 180px; height: 180px; }
.comfort-ring span:nth-child(2){ width: 124px; height: 124px; border-color: var(--champagne); }
.comfort-ring span:nth-child(3){ width: 64px; height: 64px; background: radial-gradient(circle at 40% 35%, #fff, var(--mist)); border: none; box-shadow: var(--shadow-soft); }

.stat .num, .stat .lbl { display: block; }
.stat .num { line-height: 1.1; }

@media (max-width: 880px) {
  .story__quote { font-size: 32px; }
}