:root {
  --bg: #0a0c10;
  --bg-2: #0f1218;
  --panel: #141821;
  --panel-2: #1a1f29;
  --fg: #ece7dc;
  --muted: #9aa1ad;
  --faint: #6f7683;
  --gold: #d9a441;
  --gold-light: #f2cf8b;
  --gold-deep: #a96d24;
  --line: rgba(236, 231, 220, .12);
  --line-strong: rgba(236, 231, 220, .2);
  --sans: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --display: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", serif;
  --mono: "Cascadia Code", "Consolas", "SFMono-Regular", monospace;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: .18;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }
::selection { background: var(--gold); color: #17110a; }

.skip {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 12px 18px;
  background: var(--gold);
  color: #17110a;
  border-radius: 4px;
  transition: top .2s ease;
}
.skip:focus { top: 16px; }

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

/* ---------------- header ---------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: 74px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background .35s ease, border-color .35s ease, backdrop-filter .35s ease;
}
.site-header.scrolled {
  background: rgba(10, 12, 16, .82);
  border-bottom-color: var(--line);
  backdrop-filter: blur(18px);
}
.header-inner {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 150px;
}
.brand-mark { width: 34px; height: 34px; flex: 0 0 auto; }
.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: .08em;
  font-size: 14px;
}
.brand-name small {
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .18em;
  color: var(--faint);
  font-weight: 400;
}
.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}
.nav a {
  position: relative;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: .08em;
  transition: color .2s ease;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -9px;
  height: 1px;
  background: var(--gold);
  transition: right .25s ease;
}
.nav a:hover { color: var(--fg); }
.nav a:hover::after { right: 0; }
.nav .nav-cta {
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--fg);
  transition: border-color .2s ease, background .2s ease;
}
.nav .nav-cta::after { display: none; }
.nav .nav-cta:hover { border-color: var(--gold); background: rgba(217, 164, 65, .08); }
.menu-btn {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  padding: 0;
}
.menu-btn span {
  display: block;
  width: 15px;
  height: 1px;
  margin: 4px auto;
  background: currentColor;
  transition: transform .25s ease, opacity .25s ease;
}

/* ---------------- hero ---------------- */
.hero {
  min-height: 760px;
  padding: 138px 0 70px;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  align-items: center;
  gap: 60px;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  width: 780px;
  height: 780px;
  right: -300px;
  top: -180px;
  background: radial-gradient(circle, rgba(217, 164, 65, .13), transparent 62%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  width: 600px;
  height: 600px;
  left: -340px;
  bottom: -260px;
  background: radial-gradient(circle, rgba(80, 105, 150, .08), transparent 68%);
  pointer-events: none;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 28px;
}
.eyebrow .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 12px rgba(217, 164, 65, .9);
}
.hero h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(52px, 5.6vw, 80px);
  line-height: 1.14;
  letter-spacing: -.035em;
}
.hero h1 span {
  color: var(--gold-light);
  font-style: normal;
  white-space: nowrap;
}
.hero .lede {
  max-width: 500px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 2;
  letter-spacing: .03em;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  height: 48px;
  padding: 0 24px;
  border-radius: 3px;
  border: 1px solid transparent;
  font-size: 13px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--gold);
  color: #17110a;
  font-weight: 600;
  box-shadow: 0 14px 40px rgba(217, 164, 65, .18);
}
.btn-primary:hover { background: var(--gold-light); }
.btn-primary span { font-size: 16px; line-height: 1; }
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--fg);
  background: rgba(255, 255, 255, .015);
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-light); }
.hero-meta {
  display: flex;
  gap: 24px;
  list-style: none;
  padding: 0;
  margin: 34px 0 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .12em;
  flex-wrap: wrap;
}
.hero-meta li { display: flex; align-items: center; gap: 8px; }
.hero-meta li::before {
  content: "";
  width: 4px;
  height: 4px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.hero-art {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: center;
  perspective: 1200px;
}
.aura {
  position: absolute;
  width: 540px;
  height: 540px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 164, 65, .12), rgba(217, 164, 65, .025) 42%, transparent 68%);
  filter: blur(8px);
}
.orbit {
  position: absolute;
  border: 1px solid rgba(217, 164, 65, .18);
  border-radius: 50%;
}
.orbit-a { width: 440px; height: 440px; animation: spin 34s linear infinite; }
.orbit-b { width: 540px; height: 540px; border-color: rgba(236, 231, 220, .06); animation: spin 52s linear infinite reverse; }
.orbit-a::before, .orbit-a::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 12px rgba(217, 164, 65, .8);
}
.orbit-a::before { top: 16%; left: 8%; }
.orbit-a::after { bottom: 10%; right: 18%; width: 3px; height: 3px; opacity: .6; }
@keyframes spin { to { transform: rotate(360deg); } }

.app-frame {
  position: relative;
  width: min(560px, 100%);
  background: #0d1015;
  border: 1px solid rgba(236, 231, 220, .17);
  border-radius: 10px;
  box-shadow: 0 40px 90px rgba(0, 0, 0, .55), 0 0 0 1px rgba(217, 164, 65, .04);
  transform: rotateY(-4deg) rotateX(2deg);
  transition: transform .7s cubic-bezier(.2, .8, .2, 1);
  overflow: hidden;
}
.hero-art:hover .app-frame { transform: rotateY(0) rotateX(0); }
.window-bar {
  height: 36px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 13px;
  border-bottom: 1px solid var(--line);
  background: #10141b;
}
.window-bar i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #303641;
}
.window-bar i:first-child { background: #d9a441; opacity: .8; }
.window-bar .window-title {
  margin-left: 9px;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .14em;
  color: var(--faint);
}
.window-bar .window-actions {
  margin-left: auto;
  color: #545b68;
  font-size: 11px;
  letter-spacing: .2em;
}
.app-frame img {
  width: 100%;
  aspect-ratio: 1.4;
  object-fit: cover;
  object-position: top left;
  filter: saturate(.88) contrast(1.02);
}
.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 13px 16px;
  background: rgba(17, 21, 28, .9);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .4);
  backdrop-filter: blur(14px);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--fg);
}
.float-card small {
  display: block;
  margin-top: 4px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .1em;
}
.float-card .mini {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(217, 164, 65, .4);
  display: grid;
  place-items: center;
  color: var(--gold);
  font-size: 14px;
}
.float-a { left: -26px; bottom: 74px; animation: float 7s ease-in-out infinite; }
.float-b { right: -20px; top: 90px; animation: float 8s ease-in-out infinite reverse; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ---------------- signal row ---------------- */
.signal-row {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: linear-gradient(90deg, transparent, rgba(217, 164, 65, .025), transparent);
}
.signal {
  padding: 28px 24px;
  border-right: 1px solid var(--line);
}
.signal:last-child { border-right: 0; }
.signal strong {
  display: block;
  font-family: var(--display);
  font-weight: 400;
  font-size: 30px;
  color: var(--gold-light);
  letter-spacing: -.02em;
}
.signal span {
  display: block;
  margin-top: 7px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: .1em;
}

/* ---------------- sections ---------------- */
.section { padding: 118px 0; }
section[id], div[id] { scroll-margin-top: 92px; }
.section-label {
  display: flex;
  align-items: center;
  gap: 15px;
  color: var(--gold);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  margin-bottom: 34px;
}
.section-label::after {
  content: "";
  width: 70px;
  height: 1px;
  background: var(--line-strong);
}
.statement {
  margin: 0;
  max-width: 960px;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(38px, 4.8vw, 66px);
  line-height: 1.3;
  letter-spacing: -.03em;
}
.statement em { color: var(--gold-light); font-style: normal; }
.product-copy {
  display: grid;
  grid-template-columns: 1.4fr .6fr;
  gap: 70px;
  align-items: end;
  margin-top: 58px;
}
.product-copy p {
  margin: 0;
  max-width: 530px;
  color: var(--muted);
  font-size: 14px;
  line-height: 2.1;
}
.product-copy .note {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  color: var(--faint);
  line-height: 1.9;
  border-left: 1px solid var(--gold);
  padding-left: 16px;
}

/* ---------------- features ---------------- */
.features-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 50px;
}
.features-head h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(34px, 4vw, 54px);
  letter-spacing: -.02em;
}
.features-head p {
  max-width: 350px;
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.9;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.feature-card {
  min-height: 270px;
  padding: 34px 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(255, 255, 255, .018), transparent 58%);
  position: relative;
  transition: background .35s ease, transform .35s ease;
}
.feature-card:hover {
  background: linear-gradient(145deg, rgba(217, 164, 65, .075), transparent 62%);
  transform: translateY(-3px);
}
.feature-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .16em;
}
.feature-icon {
  width: 28px;
  height: 28px;
  color: var(--gold);
}
.feature-card h3 {
  margin: 42px 0 14px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: .05em;
}
.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}
.feature-card .arrow {
  position: absolute;
  right: 28px;
  bottom: 26px;
  color: var(--faint);
  font-size: 16px;
  transition: color .2s ease, transform .2s ease;
}
.feature-card:hover .arrow { color: var(--gold); transform: translateX(3px); }

/* ---------------- showcase ---------------- */
.showcase {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 80px;
  align-items: center;
}
.showcase-media {
  position: relative;
  background: #0d1117;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .35);
}
.showcase-media img { border-radius: 4px; }
.showcase-media .corner {
  position: absolute;
  right: -16px;
  bottom: -16px;
  width: 80px;
  height: 80px;
  border-right: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  opacity: .5;
  pointer-events: none;
}
.showcase h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.3;
  letter-spacing: -.02em;
}
.showcase > div > p {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 2;
}
.check-list {
  list-style: none;
  padding: 0;
  margin: 34px 0 0;
  display: grid;
  gap: 15px;
}
.check-list li {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  color: var(--fg);
  font-size: 12.5px;
  line-height: 1.7;
}
.check-list li::before {
  content: "✓";
  color: var(--gold);
  font-family: var(--mono);
  font-size: 11px;
  margin-top: 2px;
}
.check-list span { color: var(--muted); }

/* ---------------- privacy ---------------- */
.privacy-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 70px;
  background:
    radial-gradient(circle at 82% 12%, rgba(217, 164, 65, .13), transparent 38%),
    linear-gradient(135deg, #171b23, #0f1218 65%);
}
.privacy-panel::before {
  content: "LOCAL";
  position: absolute;
  right: -20px;
  bottom: -52px;
  font-family: var(--mono);
  font-size: 190px;
  line-height: 1;
  letter-spacing: -.08em;
  color: rgba(236, 231, 220, .025);
  pointer-events: none;
}
.privacy-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 64px;
  align-items: center;
}
.privacy-panel h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.3;
}
.privacy-panel h2 em { color: var(--gold-light); font-style: normal; }
.privacy-panel p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 2;
}
.privacy-points {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.privacy-point {
  padding: 18px 20px;
  background: rgba(13, 16, 21, .72);
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  font-size: 11.5px;
}
.privacy-point span { color: var(--faint); font-family: var(--mono); font-size: 9px; letter-spacing: .1em; }
.privacy-point strong { font-weight: 400; color: var(--fg); }

/* ---------------- download ---------------- */
.download-card {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  background:
    radial-gradient(circle at 15% 20%, rgba(217, 164, 65, .12), transparent 34%),
    #11151c;
  overflow: hidden;
}
.download-card::after {
  content: "月";
  position: absolute;
  right: 34px;
  top: 4px;
  font-family: var(--display);
  font-size: 160px;
  color: rgba(217, 164, 65, .06);
  pointer-events: none;
}
.download-card h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(32px, 3.6vw, 48px);
  letter-spacing: -.02em;
}
.download-card p {
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}
.download-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 22px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .08em;
}
.download-meta span { border: 1px solid var(--line); padding: 6px 9px; border-radius: 2px; }
.download-actions { position: relative; z-index: 1; flex: 0 0 auto; }

/* ---------------- about ---------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: start;
}
.about-grid h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(34px, 4vw, 50px);
  line-height: 1.4;
}
.about-grid p {
  color: var(--muted);
  font-size: 13px;
  line-height: 2.1;
  margin: 0 0 18px;
}
.about-lines { border-top: 1px solid var(--line); }
.about-line {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
  font-size: 11.5px;
}
.about-line span { color: var(--faint); font-family: var(--mono); font-size: 9px; letter-spacing: .1em; }
.about-line a { color: var(--gold-light); border-bottom: 1px solid rgba(217, 164, 65, .35); }

/* ---------------- footer ---------------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 36px;
}
.footer-inner {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 11px; }
.footer-brand img { width: 26px; height: 26px; opacity: .8; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a, .copyright { color: var(--faint); font-size: 10px; letter-spacing: .06em; }
.footer-links a:hover { color: var(--gold-light); }

/* ---------------- legal page ---------------- */
.legal-page { padding: 150px 0 100px; }
.legal-page .kicker {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  margin-bottom: 24px;
}
.legal-page h1 {
  margin: 0 0 18px;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(42px, 5vw, 66px);
}
.legal-page .updated { color: var(--faint); font-family: var(--mono); font-size: 9px; letter-spacing: .1em; }
.legal-body {
  max-width: 760px;
  margin-top: 54px;
  border-top: 1px solid var(--line);
  padding-top: 34px;
}
.legal-body h2 {
  margin: 36px 0 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--gold-light);
  letter-spacing: .04em;
}
.legal-body p, .legal-body li {
  color: var(--muted);
  font-size: 13px;
  line-height: 2.1;
}
.legal-body ul { padding-left: 20px; }
.legal-body a { color: var(--gold-light); border-bottom: 1px solid rgba(217, 164, 65, .3); }
.back-link {
  display: inline-flex;
  gap: 8px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  margin-top: 40px;
}
.back-link:hover { color: var(--gold-light); }

/* ---------------- reveal ---------------- */
.reveal { opacity: 1; transform: none; }
html.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s ease, transform .8s cubic-bezier(.2, .8, .2, 1); }
html.js .reveal.in { opacity: 1; transform: none; }
html.js .hero .reveal { opacity: 1; transform: none; }

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

/* ---------------- responsive ---------------- */
@media (max-width: 1000px) {
  .hero { gap: 36px; padding-top: 140px; }
  .hero-art { min-height: 440px; }
  .float-a { left: 0; bottom: 38px; }
  .float-b { right: 0; top: 50px; }
  .privacy-panel { padding: 48px; }
  .privacy-grid { gap: 38px; }
  .showcase { gap: 44px; }
}

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-bottom: 60px; }
  .hero-art { order: 2; margin-top: 18px; min-height: 420px; }
  .hero-copy { order: 1; }
  .product-copy { grid-template-columns: 1fr; gap: 28px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase { grid-template-columns: 1fr; }
  .showcase-media { order: 2; }
  .showcase-copy { order: 1; }
  .privacy-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 34px; }
  .download-card { padding: 40px; align-items: flex-start; flex-direction: column; }
  .download-actions { width: 100%; }
  .download-actions .btn { width: 100%; }
}

@media (max-width: 680px) {
  .wrap, .header-inner, .footer-inner { width: calc(100% - 32px); }
  .site-header { height: 64px; }
  .nav {
    position: fixed;
    top: 64px;
    left: 16px;
    right: 16px;
    padding: 18px;
    background: rgba(13, 16, 21, .98);
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 10px; }
  .nav .nav-cta { text-align: center; margin-top: 6px; }
  .menu-btn { display: block; }
  .hero { padding-top: 116px; }
  .hero h1 { font-size: clamp(36px, 10vw, 52px); letter-spacing: -.04em; }
  .hero h1 span { white-space: normal; }
  .hero-copy, .hero-art { min-width: 0; }
  .hero .lede { max-width: 100%; }
  .header-inner { min-width: 0; }
  .hero .lede { font-size: 13.5px; }
  .hero-actions .btn { width: 100%; }
  .hero-art { min-height: 340px; }
  .app-frame { width: 100%; }
  .orbit-a { width: 310px; height: 310px; }
  .orbit-b { width: 390px; height: 390px; }
  .aura { width: 380px; height: 380px; }
  .float-card { padding: 9px 11px; font-size: 9px; }
  .float-card .mini { width: 24px; height: 24px; font-size: 11px; }
  .float-a { bottom: 12px; left: -4px; }
  .float-b { top: 14px; right: -4px; }
  .signal-row { grid-template-columns: repeat(2, 1fr); }
  .signal:nth-child(2) { border-right: 0; }
  .signal { border-bottom: 1px solid var(--line); }
  .signal:nth-last-child(-n+2) { border-bottom: 0; }
  .section { padding: 78px 0; }
  .features-head { flex-direction: column; align-items: flex-start; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 220px; }
  .privacy-panel { padding: 30px 22px; }
  .privacy-point { padding: 15px; font-size: 10.5px; }
  .download-card { padding: 30px 22px; }
  .download-card::after { font-size: 110px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}