/* Group and Evolve — project homepage */
:root {
  color-scheme: dark;
  --bg: #050806;
  --surface: #090e0a;
  --surface-raised: #0d130e;
  --ink: #f0f5e9;
  --muted: #99a49a;
  --faint: #657066;
  --line: rgba(224, 242, 224, 0.1);
  --line-strong: rgba(224, 242, 224, 0.17);
  --acid: #d7ff78;
  --acid-soft: rgba(215, 255, 120, 0.1);
  --mint: #72eac1;
  --coral: #ff9384;
  --violet: #bca2ff;
  --amber: #ffc777;
  --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", "Menlo", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max: 1240px;
  --ease: cubic-bezier(0.2, 0.72, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::selection {
  color: #0b100b;
  background: var(--acid);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3,
p,
blockquote {
  margin-top: 0;
}

svg {
  display: block;
}

.page {
  position: relative;
  z-index: 1;
  overflow: clip;
}

.page-ambient {
  position: fixed;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(70% 55% at 50% -12%, rgba(93, 131, 84, 0.13), transparent 65%),
    var(--bg);
}

.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.55;
}

.glow-one {
  top: -15%;
  right: -10%;
  width: 780px;
  height: 780px;
  background: rgba(56, 173, 139, 0.12);
}

.glow-two {
  top: 45%;
  left: -18%;
  width: 720px;
  height: 720px;
  background: rgba(174, 219, 87, 0.055);
}

.ambient-grid {
  position: absolute;
  inset: 0;
  opacity: 0.45;
  background-image:
    linear-gradient(rgba(216, 238, 211, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(216, 238, 211, 0.035) 1px, transparent 1px);
  background-size: 92px 92px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 24%, #000 15%, transparent 84%);
}

.ambient-grain {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
}

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

.site-nav {
  position: fixed;
  z-index: 50;
  top: 0;
  right: 0;
  left: 0;
  border-bottom: 1px solid transparent;
  transition:
    background 260ms ease,
    border-color 260ms ease,
    backdrop-filter 260ms ease;
}

.site-nav.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(5, 8, 6, 0.75);
  backdrop-filter: blur(18px) saturate(120%);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--max), calc(100% - 56px));
  height: 78px;
  margin: 0 auto;
  gap: 30px;
}

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

.nav-mark {
  display: grid;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--acid);
  border: 1px solid rgba(215, 255, 120, 0.24);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, rgba(215, 255, 120, 0.13), rgba(8, 13, 9, 0.52) 70%);
}

.nav-mark svg {
  width: 29px;
  height: 29px;
}

.nav-name {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.nav-name strong {
  color: var(--ink);
  font-size: 14px;
  font-weight: 560;
  line-height: 1;
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.nav-name small {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6.5px;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.4vw, 32px);
  color: var(--muted);
  font-size: 10.5px;
}

.nav-links a {
  position: relative;
  padding: 8px 0;
  transition: color 160ms ease;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 1px;
  content: "";
  background: var(--acid);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms var(--ease);
}

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

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px 0 14px;
  color: var(--acid);
  border: 1px solid rgba(215, 255, 120, 0.24);
  border-radius: 7px;
  background: rgba(215, 255, 120, 0.055);
  font-size: 10px;
  transition:
    background 170ms ease,
    border-color 170ms ease,
    color 170ms ease;
}

.nav-cta svg {
  width: 13px;
  height: 13px;
}

.nav-cta:hover {
  color: #0a0f08;
  border-color: var(--acid);
  background: var(--acid);
}

/* ------------------------------------------------------------------ type */

.kicker {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 19px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.kicker i {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 10px rgba(215, 255, 120, 0.62);
}

.micro-label {
  margin: 0 0 10px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.11em;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 42px;
  font-size: 11px;
  letter-spacing: 0.01em;
  transition:
    transform 180ms var(--ease),
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

.button svg {
  width: 17px;
  height: 17px;
}

.button-primary {
  padding: 0 16px;
  color: #0a0f08;
  border: 1px solid var(--acid);
  border-radius: 8px;
  background: var(--acid);
  box-shadow: 0 12px 32px rgba(198, 255, 100, 0.08);
  font-weight: 580;
}

.button-primary:hover {
  background: #e1ff9c;
  transform: translateY(-2px);
}

.button-quiet {
  padding: 0 4px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.button-quiet span {
  color: var(--acid);
  font-family: var(--mono);
  font-size: 12px;
  transition: transform 180ms var(--ease);
}

.button-quiet:hover {
  color: var(--ink);
  border-color: var(--line-strong);
}

.button-quiet:hover span {
  transform: translateY(2px);
}

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

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(380px, 0.96fr);
  gap: clamp(38px, 5vw, 76px);
  align-items: center;
  width: min(var(--max), calc(100% - 56px));
  min-height: 100svh;
  margin: 0 auto;
  padding: 145px 0 94px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero-copy > * {
  animation: rise-in 950ms var(--ease) both;
}

.hero-copy > :nth-child(2) {
  animation-delay: 60ms;
}

.hero-copy > :nth-child(3) {
  animation-delay: 120ms;
}

.hero-copy > :nth-child(4) {
  animation-delay: 180ms;
}

.hero-copy > :nth-child(5) {
  animation-delay: 220ms;
}

.hero-copy > :nth-child(6) {
  animation-delay: 280ms;
}

.hero-kicker {
  margin-bottom: 27px;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(45px, 5.4vw, 78px);
  font-weight: 520;
  line-height: 1.1;
  letter-spacing: -0.07em;
}

.hero h1 em {
  display: block;
  margin-top: 2px;
  font-style: normal;
  background: linear-gradient(105deg, var(--acid) 3%, #c5f39b 44%, var(--mint) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.hero-lede {
  max-width: 565px;
  margin: 27px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.95;
}

.hero-lede strong {
  color: var(--ink);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 21px;
  margin-top: 32px;
}

.hero-note {
  margin: 18px 0 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.02em;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  max-width: 575px;
  margin: 44px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.hero-facts div {
  min-width: 0;
}

.hero-facts dt {
  margin-bottom: 7px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6.5px;
  letter-spacing: 0.1em;
}

.hero-facts dd {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin: 0;
}

.hero-facts strong {
  overflow: hidden;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.04em;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.hero-facts strong span {
  color: var(--faint);
  font-size: 11px;
  font-weight: 400;
}

.hero-facts dd > span {
  color: var(--muted);
  font-size: 8px;
  white-space: nowrap;
}

.hero-visual {
  position: relative;
  z-index: 1;
  min-width: 0;
  animation: rise-in 1100ms 140ms var(--ease) both;
}

.hero-orbit {
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 50%;
  width: 590px;
  height: 590px;
  border: 1px solid rgba(193, 225, 180, 0.09);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(-19deg);
  pointer-events: none;
}

.hero-orbit::before,
.hero-orbit::after {
  position: absolute;
  inset: 9%;
  content: "";
  border: 1px dashed rgba(193, 225, 180, 0.075);
  border-radius: inherit;
}

.hero-orbit::after {
  inset: 21%;
  border-style: solid;
  border-color: rgba(114, 234, 193, 0.055);
}

.culture-card {
  position: relative;
  width: min(100%, 540px);
  aspect-ratio: 1 / 1.04;
  margin-left: auto;
  overflow: hidden;
  border: 1px solid rgba(219, 241, 216, 0.16);
  border-radius: 24px;
  background:
    radial-gradient(80% 65% at 55% 43%, rgba(51, 104, 82, 0.24), transparent 68%),
    linear-gradient(145deg, rgba(20, 32, 23, 0.94), rgba(6, 11, 8, 0.99));
  box-shadow:
    0 35px 90px rgba(0, 0, 0, 0.39),
    inset 0 1px 0 rgba(255, 255, 255, 0.045);
}

.culture-card::before {
  position: absolute;
  z-index: 0;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(203, 233, 203, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(203, 233, 203, 0.05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at 50% 50%, #000, transparent 78%);
}

.culture-card::after {
  position: absolute;
  z-index: 0;
  inset: 0;
  pointer-events: none;
  content: "";
  background: radial-gradient(circle at 50% 52%, transparent 35%, rgba(3, 7, 4, 0.58) 100%);
}

.culture-ring {
  position: absolute;
  z-index: 0;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(142, 227, 173, 0.1);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
}

.ring-a {
  width: 70%;
  aspect-ratio: 1;
}

.ring-b {
  width: 92%;
  aspect-ratio: 1;
  border-style: dashed;
  border-color: rgba(190, 219, 159, 0.065);
  transform: translate(-50%, -50%) rotate(38deg) scaleY(0.8);
}

#cultureCanvas {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
}

.culture-top {
  position: absolute;
  z-index: 3;
  top: 19px;
  right: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.live-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 23px;
  padding: 0 8px;
  color: var(--acid);
  border: 1px solid rgba(215, 255, 120, 0.17);
  border-radius: 5px;
  background: rgba(7, 12, 8, 0.36);
  font-family: var(--mono);
  font-size: 6.8px;
  letter-spacing: 0.06em;
}

.live-chip i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 9px var(--acid);
  animation: live-pulse 2.3s ease-in-out infinite;
}

.culture-serial {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6.8px;
  letter-spacing: 0.11em;
}

.culture-corner {
  position: absolute;
  z-index: 3;
  width: 16px;
  height: 16px;
  pointer-events: none;
}

.corner-tl {
  top: 50px;
  left: 20px;
  border-top: 1px solid rgba(215, 255, 120, 0.36);
  border-left: 1px solid rgba(215, 255, 120, 0.36);
}

.corner-br {
  right: 20px;
  bottom: 91px;
  border-right: 1px solid rgba(215, 255, 120, 0.36);
  border-bottom: 1px solid rgba(215, 255, 120, 0.36);
}

.culture-stamp {
  position: absolute;
  z-index: 3;
  top: 80px;
  left: 20px;
  color: rgba(213, 237, 207, 0.28);
  font-family: var(--mono);
  font-size: 6px;
  line-height: 1.8;
  letter-spacing: 0.09em;
  pointer-events: none;
}

.culture-readout {
  position: absolute;
  z-index: 3;
  right: 20px;
  bottom: 55px;
  left: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
  padding-top: 13px;
  border-top: 1px solid rgba(216, 238, 211, 0.11);
  pointer-events: none;
}

.culture-readout div {
  min-width: 0;
}

.culture-readout span {
  display: block;
  margin-bottom: 5px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6.2px;
  letter-spacing: 0.1em;
}

.culture-readout strong {
  display: block;
  overflow: hidden;
  color: rgba(227, 247, 218, 0.76);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.45;
  text-overflow: ellipsis;
}

.culture-foot {
  position: absolute;
  z-index: 3;
  right: 20px;
  bottom: 18px;
  left: 20px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: rgba(204, 228, 197, 0.33);
  font-family: var(--mono);
  font-size: 6.3px;
  letter-spacing: 0.02em;
  pointer-events: none;
}

.visual-caption {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  max-width: 540px;
  margin: 13px 0 0 auto;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.015em;
  text-align: right;
}

.caption-line {
  display: inline-block;
  width: 27px;
  height: 1px;
  background: rgba(215, 255, 120, 0.45);
}

.scroll-cue {
  position: absolute;
  bottom: 31px;
  left: 0;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6.5px;
  letter-spacing: 0.12em;
  transition: color 160ms ease;
}

.scroll-cue i {
  display: block;
  width: 1px;
  height: 28px;
  background: linear-gradient(var(--line-strong), transparent);
  position: relative;
}

.scroll-cue i::after {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 8px;
  content: "";
  background: var(--acid);
  animation: scroll-line 2.2s ease-in-out infinite;
}

.scroll-cue:hover {
  color: var(--muted);
}

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

.section {
  position: relative;
  width: min(var(--max), calc(100% - 56px));
  margin: 0 auto;
  padding: 112px 0;
}

section[id] {
  scroll-margin-top: 94px;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(280px, 0.84fr);
  align-items: end;
  gap: 56px;
  margin-bottom: 50px;
}

.section-head h2,
.observation-copy h2,
.launch-inner h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(32px, 3.9vw, 52px);
  font-weight: 520;
  line-height: 1.15;
  letter-spacing: -0.055em;
}

.section-intro {
  max-width: 410px;
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}

.mechanism-section {
  border-top: 1px solid var(--line);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 222px;
  padding: 24px 23px 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 13px;
  background:
    linear-gradient(145deg, rgba(18, 26, 19, 0.7), rgba(8, 13, 9, 0.68));
  transition:
    transform 240ms var(--ease),
    border-color 220ms ease,
    background 220ms ease;
}

.feature-card::after {
  position: absolute;
  right: 23px;
  bottom: 0;
  left: 23px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(215, 255, 120, 0.35), transparent);
  opacity: 0;
  transition: opacity 220ms ease;
}

.feature-card:hover {
  background:
    linear-gradient(145deg, rgba(25, 37, 27, 0.78), rgba(9, 15, 10, 0.72));
  border-color: rgba(215, 255, 120, 0.22);
  transform: translateY(-3px);
}

.feature-card:hover::after {
  opacity: 1;
}

.feature-card.feature-accent {
  background:
    radial-gradient(110% 100% at 8% 0%, rgba(213, 255, 120, 0.1), transparent 52%),
    linear-gradient(145deg, rgba(20, 31, 22, 0.85), rgba(8, 13, 9, 0.7));
  border-color: rgba(215, 255, 120, 0.18);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.06em;
}

.card-top i {
  display: block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(215, 255, 120, 0.55);
  box-shadow: 0 0 8px rgba(215, 255, 120, 0.2);
}

.feature-card .micro-label {
  margin-top: 28px;
  margin-bottom: 8px;
}

.feature-card h3 {
  margin: 0 0 11px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 520;
  line-height: 1.4;
  letter-spacing: -0.025em;
}

.feature-card p:last-child {
  max-width: 330px;
  margin: 0;
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.8;
}

/* ------------------------------------------------------------------ flow */

.flow-section {
  padding: 0 28px;
}

.flow-inner {
  position: relative;
  width: min(var(--max), 100%);
  margin: 52px auto;
  padding: 66px 47px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    radial-gradient(75% 150% at 50% 0%, rgba(53, 92, 64, 0.12), transparent 61%),
    linear-gradient(180deg, rgba(13, 19, 14, 0.85), rgba(7, 11, 8, 0.9));
}

.flow-inner::before {
  position: absolute;
  top: -100px;
  right: -140px;
  width: 540px;
  height: 540px;
  content: "";
  border: 1px solid rgba(189, 225, 172, 0.075);
  border-radius: 50%;
  pointer-events: none;
}

.flow-inner::after {
  position: absolute;
  top: 42px;
  right: 28px;
  content: "LOOP / 无限";
  color: rgba(218, 241, 208, 0.14);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.14em;
}

.flow-head {
  position: relative;
  z-index: 1;
  margin-bottom: 43px;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-right: -47px;
  margin-left: -47px;
  border-top: 1px solid var(--line);
}

.flow-step {
  position: relative;
  min-height: 194px;
  padding: 25px 25px 31px;
  border-left: 1px solid var(--line);
}

.flow-step:first-child {
  border-left: 0;
}

.flow-step::before {
  position: absolute;
  top: 0;
  left: 24px;
  width: 4px;
  height: 4px;
  content: "";
  background: var(--acid);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 9px rgba(215, 255, 120, 0.4);
}

.flow-index {
  display: block;
  margin-bottom: 30px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.08em;
}

.flow-step h3 {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin: 0 0 12px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 7.5px;
  font-weight: 400;
  letter-spacing: 0.07em;
}

.flow-step h3 span {
  color: var(--acid);
  font-family: var(--sans);
  font-size: 26px;
  font-weight: 450;
  letter-spacing: -0.08em;
}

.flow-step p {
  max-width: 210px;
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.8;
}

/* ------------------------------------------------------------ observation */

.observation-section {
  display: grid;
  grid-template-columns: minmax(0, 0.76fr) minmax(0, 1.24fr);
  align-items: center;
  gap: clamp(40px, 6vw, 88px);
  border-top: 1px solid var(--line);
}

.observation-copy h2 {
  max-width: 430px;
  margin-bottom: 23px;
  font-size: clamp(30px, 3.35vw, 44px);
}

.observation-copy > p:not(.kicker) {
  max-width: 385px;
  margin: 0;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.95;
}

.observation-list {
  margin: 28px 0 31px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.observation-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  color: var(--muted);
  border-bottom: 1px solid rgba(225, 242, 226, 0.065);
  font-size: 9.5px;
}

.observation-list span {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 7px;
}

.observation-list li::before {
  display: block;
  flex: 0 0 3px;
  width: 3px;
  height: 3px;
  margin-top: 1px;
  content: "";
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 7px rgba(215, 255, 120, 0.35);
}

.app-frame {
  margin: 0;
  padding: 7px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 15px;
  background: rgba(7, 12, 8, 0.82);
  box-shadow:
    0 35px 90px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 31px;
  gap: 12px;
  padding: 0 6px 0 9px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6.3px;
  letter-spacing: 0.06em;
}

.frame-bar span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.frame-bar i {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 7px rgba(255, 147, 132, 0.55);
}

.frame-image {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: 9px;
  background: var(--surface);
}

.frame-image img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center;
  opacity: 0.92;
  transition:
    transform 600ms var(--ease),
    opacity 300ms ease;
}

.frame-image:hover img {
  opacity: 1;
  transform: scale(1.012);
}

.frame-open {
  position: absolute;
  right: 13px;
  bottom: 13px;
  display: inline-flex;
  align-items: center;
  height: 27px;
  padding: 0 10px;
  color: #0a0f08;
  border-radius: 5px;
  background: var(--acid);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.03em;
}

.app-frame figcaption {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 8px 5px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.02em;
}

/* --------------------------------------------------------------- manifesto */

.manifesto {
  margin: 24px 0;
  padding: 98px 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(48% 90% at 50% 30%, rgba(135, 179, 106, 0.08), transparent 70%),
    rgba(8, 12, 9, 0.4);
}

.manifesto-inner {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.manifesto .kicker {
  justify-content: center;
}

.manifesto blockquote {
  margin: 0 auto;
  color: var(--ink);
  font-size: clamp(31px, 4.2vw, 55px);
  font-weight: 450;
  line-height: 1.25;
  letter-spacing: -0.06em;
}

.manifesto blockquote em {
  font-style: normal;
  background: linear-gradient(90deg, var(--acid), var(--mint));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.manifesto p:last-child {
  max-width: 535px;
  margin: 28px auto 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.9;
}

/* ------------------------------------------------------------------- faq */

.questions-section {
  padding-top: 100px;
  padding-bottom: 105px;
}

.questions-head {
  display: block;
  margin-bottom: 32px;
}

.faq-list {
  max-width: 890px;
  margin-left: auto;
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 19px 0;
  color: var(--muted);
  font-size: 12px;
  list-style: none;
  cursor: pointer;
  transition: color 160ms ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--ink);
}

.faq-item summary span {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.faq-item summary span::before,
.faq-item summary span::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 1px;
  content: "";
  background: var(--muted);
  transform: translate(-50%, -50%);
  transition: transform 180ms ease;
}

.faq-item summary span::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item[open] summary {
  color: var(--ink);
}

.faq-item[open] summary span::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-item p {
  max-width: 720px;
  margin: -2px 0 23px;
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.9;
}

/* ----------------------------------------------------------------- launch */

.launch-section {
  width: min(var(--max), calc(100% - 56px));
  margin: 0 auto;
  padding: 10px 0 112px;
}

.launch-inner {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 35px;
  overflow: hidden;
  padding: 48px 49px;
  border: 1px solid rgba(215, 255, 120, 0.16);
  border-radius: 23px;
  background:
    radial-gradient(52% 170% at 85% 20%, rgba(215, 255, 120, 0.12), transparent 64%),
    linear-gradient(110deg, rgba(22, 33, 23, 0.91), rgba(8, 14, 9, 0.92));
}

.launch-inner::after {
  position: absolute;
  top: -210px;
  right: 7%;
  width: 520px;
  height: 520px;
  content: "";
  border: 1px solid rgba(215, 255, 120, 0.12);
  border-radius: 50%;
  pointer-events: none;
}

.launch-inner .kicker {
  margin-bottom: 15px;
}

.launch-inner h2 {
  font-size: clamp(30px, 3.3vw, 45px);
}

.launch-inner h2 em {
  color: var(--acid);
  font-style: normal;
}

.launch-button {
  position: relative;
  z-index: 1;
  min-width: 123px;
}

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

.site-footer {
  position: relative;
  z-index: 2;
  width: min(var(--max), calc(100% - 56px));
  margin: 0 auto;
  padding: 44px 0 22px;
  border-top: 1px solid var(--line);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr) minmax(0, 1fr);
  gap: 50px;
  align-items: start;
}

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

.footer-brand .nav-mark {
  flex-basis: 34px;
  width: 34px;
  height: 34px;
}

.footer-brand strong {
  display: block;
  color: var(--ink);
  font-size: 12px;
  font-weight: 540;
  line-height: 1.2;
}

.footer-brand small {
  display: block;
  margin-top: 4px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.08em;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 11px 22px;
  padding-top: 3px;
  color: var(--muted);
  font-size: 9px;
}

.footer-links a {
  transition: color 160ms ease;
}

.footer-links a:hover {
  color: var(--acid);
}

.footer-credit {
  min-height: 54px;
  padding-left: 26px;
  text-align: right;
  border-left: 1px solid var(--line);
}

.footer-label {
  display: block;
  margin-bottom: 7px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.12em;
}

.footer-credit a {
  display: inline-block;
  color: var(--acid);
  border-bottom: 1px solid rgba(215, 255, 120, 0.42);
  font-size: 11px;
  font-weight: 500;
  transition:
    border-color 160ms ease,
    color 160ms ease;
}

.footer-credit a::after {
  content: " ↗";
  color: var(--mint);
  font-family: var(--mono);
  font-size: 9px;
}

.footer-credit a:hover {
  color: #f1ffcf;
  border-color: var(--acid);
}

.footer-credit p {
  margin: 7px 0 0;
  color: var(--faint);
  font-size: 8px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 40px;
  padding-top: 17px;
  border-top: 1px solid rgba(225, 242, 226, 0.065);
  color: var(--faint);
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.04em;
}

.footer-bottom a {
  color: var(--muted);
  transition: color 160ms ease;
}

.footer-bottom a:hover {
  color: var(--acid);
}

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

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes live-pulse {
  0%,
  100% {
    opacity: 0.45;
    transform: scale(0.82);
  }
  50% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes scroll-line {
  0%,
  100% {
    opacity: 0;
    transform: translateY(0);
  }
  25% {
    opacity: 0.75;
  }
  75% {
    opacity: 0.2;
    transform: translateY(19px);
  }
}

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

@media (max-width: 1120px) {
  .hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
    gap: 38px;
  }

  .hero h1 {
    font-size: clamp(43px, 5.3vw, 64px);
  }

  .culture-card {
    width: min(100%, 480px);
  }

  .visual-caption {
    max-width: 480px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-card {
    min-height: 214px;
  }

  .flow-inner {
    padding-right: 32px;
    padding-left: 32px;
  }

  .flow-grid {
    margin-right: -32px;
    margin-left: -32px;
  }

  .flow-step {
    padding-right: 18px;
    padding-left: 18px;
  }

  .flow-step p {
    max-width: 190px;
  }
}

@media (max-width: 880px) {
  .nav-inner {
    width: min(var(--max), calc(100% - 36px));
    height: 68px;
    gap: 18px;
  }

  .nav-links {
    gap: 17px;
    font-size: 9.5px;
  }

  .hero {
    grid-template-columns: 1fr;
    width: min(var(--max), calc(100% - 36px));
    min-height: auto;
    padding-top: 122px;
    padding-bottom: 90px;
    gap: 61px;
  }

  .hero-copy {
    max-width: 700px;
  }

  .hero h1 {
    font-size: clamp(43px, 8.3vw, 70px);
  }

  .hero-lede {
    max-width: 620px;
  }

  .hero-facts {
    max-width: none;
  }

  .hero-visual {
    width: min(100%, 620px);
    margin: 0 auto;
  }

  .culture-card {
    width: 100%;
    aspect-ratio: 1.12 / 1;
  }

  .visual-caption {
    max-width: none;
    justify-content: flex-start;
  }

  .hero-orbit,
  .scroll-cue {
    display: none;
  }

  .section {
    width: min(var(--max), calc(100% - 36px));
    padding: 82px 0;
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: 23px;
    margin-bottom: 37px;
  }

  .section-intro {
    max-width: 560px;
  }

  .flow-section {
    padding: 0 18px;
  }

  .flow-inner {
    width: 100%;
    margin: 30px auto;
    padding: 48px 26px 0;
  }

  .flow-head {
    margin-bottom: 34px;
  }

  .flow-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-right: -26px;
    margin-left: -26px;
  }

  .flow-step {
    min-height: 170px;
    padding: 23px 22px 28px;
    border-top: 1px solid var(--line);
  }

  .flow-step:nth-child(odd) {
    border-left: 0;
  }

  .flow-step:nth-child(-n + 2) {
    border-top: 0;
  }

  .flow-index {
    margin-bottom: 23px;
  }

  .flow-step p {
    max-width: 260px;
  }

  .observation-section {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .observation-copy {
    max-width: 620px;
  }

  .observation-list {
    max-width: 540px;
  }

  .app-frame {
    width: 100%;
  }

  .manifesto {
    padding: 74px 24px;
  }

  .questions-section {
    padding-top: 76px;
    padding-bottom: 86px;
  }

  .faq-list {
    margin-left: 0;
  }

  .launch-section {
    width: min(var(--max), calc(100% - 36px));
    padding-bottom: 86px;
  }

  .launch-inner {
    display: block;
    padding: 37px 28px;
  }

  .launch-button {
    margin-top: 28px;
  }

  .site-footer {
    width: min(var(--max), calc(100% - 36px));
  }

  .footer-main {
    grid-template-columns: 1fr 0.75fr;
    gap: 30px;
  }

  .footer-credit {
    grid-column: 1 / -1;
    padding: 20px 0 0;
    text-align: left;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 640px) {
  .nav-inner {
    width: calc(100% - 32px);
    height: 62px;
  }

  .nav-mark {
    flex-basis: 31px;
    width: 31px;
    height: 31px;
  }

  .nav-mark svg {
    width: 25px;
    height: 25px;
  }

  .nav-name strong {
    font-size: 12px;
  }

  .nav-name small {
    font-size: 5.5px;
  }

  .nav-links {
    display: none;
  }

  .nav-cta {
    height: 30px;
    padding: 0 10px;
    font-size: 8.5px;
  }

  .nav-cta svg {
    width: 11px;
    height: 11px;
  }

  .hero {
    width: calc(100% - 32px);
    padding-top: 103px;
    padding-bottom: 68px;
    gap: 42px;
  }

  .hero-kicker {
    margin-bottom: 20px;
    font-size: 7px;
  }

  .hero h1 {
    font-size: clamp(34px, 11.2vw, 51px);
    line-height: 1.12;
  }

  .hero-lede {
    margin-top: 21px;
    font-size: 11.5px;
    line-height: 1.9;
  }

  .hero-actions {
    align-items: flex-start;
    gap: 17px;
    margin-top: 26px;
  }

  .button {
    min-height: 39px;
    font-size: 10px;
  }

  .hero-note {
    font-size: 6.5px;
  }

  .hero-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 14px;
    margin-top: 32px;
    padding-top: 17px;
  }

  .hero-facts strong {
    font-size: 14px;
  }

  .hero-facts dd > span {
    font-size: 7px;
  }

  .culture-card {
    aspect-ratio: 0.99 / 1;
    border-radius: 18px;
  }

  .culture-top {
    top: 14px;
    right: 14px;
    left: 14px;
  }

  .live-chip {
    height: 21px;
    padding: 0 7px;
    font-size: 6px;
  }

  .culture-serial {
    font-size: 6px;
  }

  .culture-stamp {
    top: 61px;
    left: 14px;
    font-size: 5.5px;
  }

  .culture-corner.corner-tl {
    top: 43px;
    left: 14px;
  }

  .culture-corner.corner-br {
    right: 14px;
    bottom: 86px;
  }

  .culture-readout {
    right: 14px;
    bottom: 48px;
    left: 14px;
    gap: 8px;
    padding-top: 10px;
  }

  .culture-readout span {
    font-size: 5.6px;
  }

  .culture-readout strong {
    font-size: 7px;
  }

  .culture-foot {
    right: 14px;
    bottom: 14px;
    left: 14px;
    font-size: 5.6px;
  }

  .visual-caption {
    margin-top: 10px;
    font-size: 6px;
    line-height: 1.5;
  }

  .section {
    width: calc(100% - 32px);
    padding: 66px 0;
  }

  .kicker {
    margin-bottom: 14px;
    font-size: 7px;
    letter-spacing: 0.11em;
  }

  .section-head h2,
  .observation-copy h2,
  .launch-inner h2 {
    font-size: clamp(29px, 8.2vw, 39px);
  }

  .section-intro {
    font-size: 10.5px;
    line-height: 1.9;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .feature-card {
    min-height: 190px;
    padding: 20px 19px;
  }

  .feature-card .micro-label {
    margin-top: 24px;
  }

  .feature-card h3 {
    font-size: 16px;
  }

  .feature-card p:last-child {
    font-size: 9.5px;
  }

  .flow-section {
    padding: 0 16px;
  }

  .flow-inner {
    margin: 18px auto;
    padding: 36px 19px 0;
    border-radius: 18px;
  }

  .flow-grid {
    grid-template-columns: 1fr;
    margin-right: -19px;
    margin-left: -19px;
  }

  .flow-step {
    min-height: auto;
    padding: 22px 19px 25px;
    border-left: 0;
  }

  .flow-step:nth-child(2) {
    border-top: 1px solid var(--line);
  }

  .flow-step p {
    max-width: none;
    font-size: 9.5px;
  }

  .observation-copy > p:not(.kicker) {
    font-size: 10.5px;
  }

  .observation-list li {
    font-size: 8.5px;
  }

  .app-frame {
    padding: 5px;
    border-radius: 12px;
  }

  .frame-bar {
    height: 27px;
    font-size: 5.5px;
  }

  .frame-bar span:last-child {
    display: none;
  }

  .frame-open {
    right: 8px;
    bottom: 8px;
    height: 23px;
    font-size: 6px;
  }

  .app-frame figcaption {
    display: block;
    padding: 8px 5px 4px;
    font-size: 5.5px;
    line-height: 1.6;
  }

  .app-frame figcaption span:last-child {
    display: none;
  }

  .manifesto {
    padding: 58px 18px;
  }

  .manifesto blockquote {
    font-size: clamp(28px, 8.8vw, 38px);
  }

  .manifesto p:last-child {
    margin-top: 21px;
    font-size: 9.5px;
  }

  .questions-section {
    padding-top: 63px;
    padding-bottom: 67px;
  }

  .faq-item summary {
    padding: 16px 0;
    font-size: 10.5px;
  }

  .faq-item p {
    font-size: 9.5px;
  }

  .launch-section {
    width: calc(100% - 32px);
    padding-bottom: 63px;
  }

  .launch-inner {
    padding: 28px 21px;
    border-radius: 17px;
  }

  .launch-inner h2 {
    font-size: clamp(28px, 8vw, 36px);
  }

  .site-footer {
    width: calc(100% - 32px);
    padding-top: 35px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-links {
    max-width: 220px;
  }

  .footer-credit {
    padding: 17px 0 0;
  }

  .footer-bottom {
    display: block;
    margin-top: 27px;
    line-height: 1.9;
  }

  .footer-bottom span {
    display: block;
  }

  .footer-bottom a {
    display: inline-block;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.0001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.0001ms !important;
  }
}