@charset "UTF-8";

:root {
  color-scheme: light;
  --ink: #0f172a;
  --ink-strong: #020617;
  --muted: #526173;
  --subtle: #718096;
  --paper: #f8fafc;
  --white: #ffffff;
  --line: #dfe7ee;
  --blue: #0369a1;
  --blue-dark: #07506f;
  --cyan: #0f8d96;
  --navy: #031622;
  --focus: #0284c7;
  --max: 1240px;
  --header-height: 86px;
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 6%, rgba(14, 165, 183, .08), transparent 25rem),
    linear-gradient(180deg, #fbfdfe 0, var(--paper) 42rem, #fff 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .28;
  background-image: linear-gradient(rgba(15, 23, 42, .018) 1px, transparent 1px), linear-gradient(90deg, rgba(15, 23, 42, .018) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000, transparent 72%);
  z-index: -1;
}

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

a:focus-visible,
button:focus-visible,
#stage:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 12px 16px;
  border-radius: 8px;
  color: #fff;
  background: var(--ink-strong);
  text-decoration: none;
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: relative;
  z-index: 20;
  height: var(--header-height);
  border-bottom: 1px solid rgba(15, 23, 42, .08);
}

.header-inner {
  width: min(calc(100% - 48px), var(--max));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 38px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  position: relative;
  display: grid;
  place-items: center;
  border: 1px solid rgba(3, 105, 161, .35);
  border-radius: 50%;
  color: var(--blue);
  font: 700 18px/1 Bahnschrift, "Segoe UI", sans-serif;
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(15, 141, 150, .22);
  border-radius: 50%;
}

.brand-mark b,
.brand-mark i { position: absolute; font-style: normal; }
.brand-mark b { transform: translateX(-5px); }
.brand-mark i { transform: translateX(6px); color: var(--cyan); }

.brand-name {
  display: block;
  color: var(--ink-strong);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .05em;
  white-space: nowrap;
}

.brand-name small {
  display: block;
  margin-top: 5px;
  color: var(--subtle);
  font: 500 8px/1.2 Bahnschrift, "Segoe UI", sans-serif;
  letter-spacing: .17em;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a {
  color: #485568;
  font-size: 13px;
  text-decoration: none;
  transition: color .2s ease;
}

.site-nav a:hover { color: var(--blue); }

.header-cta {
  min-height: 44px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border: 1px solid #c9d6e0;
  border-radius: 999px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}

.header-cta:hover { color: #fff; border-color: var(--ink); background: var(--ink); }

.hero {
  width: min(calc(100% - 48px), var(--max));
  min-height: calc(100svh - var(--header-height));
  margin: 0 auto;
  padding: 54px 0 64px;
  display: grid;
  grid-template-columns: minmax(0, .91fr) minmax(500px, 1.09fr);
  align-items: center;
  gap: clamp(28px, 5vw, 82px);
}

.hero-copy { padding: 38px 0 22px; }

.eyebrow,
.section-index {
  margin: 0;
  color: var(--blue);
  font: 600 11px/1.4 Bahnschrift, "Segoe UI", sans-serif;
  letter-spacing: .16em;
}

.eyebrow { display: flex; align-items: center; gap: 12px; }
.eyebrow > span { width: 28px; height: 1px; background: var(--cyan); }

h1 {
  margin: 27px 0 24px;
  color: var(--ink-strong);
  font-size: clamp(46px, 5vw, 72px);
  font-weight: 650;
  line-height: 1.14;
  letter-spacing: -.055em;
}

h1 span { display: block; }

.hero-intro {
  max-width: 570px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 2;
  letter-spacing: .015em;
}

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

.button {
  min-height: 48px;
  padding: 0 21px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); }
.button-primary:hover { background: var(--blue-dark); }
.button-quiet { color: var(--ink); border-color: #cbd7e0; background: rgba(255, 255, 255, .64); }
.button-quiet:hover { border-color: #9db2c2; background: #fff; }

.principle-rail {
  margin: 54px 0 0;
  padding: 21px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  border-top: 1px solid var(--line);
}

.principle-rail div { display: flex; flex-direction: column; gap: 5px; }
.principle-rail dt { color: var(--blue); font: 600 10px/1 Bahnschrift, sans-serif; letter-spacing: .14em; }
.principle-rail dd { margin: 0; color: #334155; font-size: 12px; white-space: nowrap; }

.card-column { min-width: 0; }

.card-kicker {
  margin: 0 18px 13px;
  display: flex;
  justify-content: space-between;
  color: #587080;
  font: 600 9px/1 Bahnschrift, "Segoe UI", sans-serif;
  letter-spacing: .18em;
}

.card-theatre {
  height: min(69svh, 690px);
  min-height: 580px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(86, 142, 158, .22);
  border-radius: 38px;
  background:
    radial-gradient(circle at 50% 47%, rgba(42, 194, 190, .18), transparent 24%),
    radial-gradient(circle at 50% 50%, #092e3e 0, #051c29 45%, #03131e 80%);
  box-shadow: 0 36px 84px rgba(2, 24, 35, .14), inset 0 1px rgba(255, 255, 255, .12);
  isolation: isolate;
}

.card-theatre::before,
.card-theatre::after {
  content: "";
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.card-theatre::before {
  inset: 0;
  opacity: .22;
  background-image: linear-gradient(rgba(166, 236, 236, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(166, 236, 236, .08) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at center, #000, transparent 74%);
}

.card-theatre::after {
  left: 7%;
  right: 7%;
  bottom: 3.5%;
  height: 15%;
  border-radius: 50%;
  background: rgba(53, 213, 205, .11);
  filter: blur(34px);
}

.theatre-orbit {
  position: absolute;
  left: 50%;
  top: 50%;
  border: 1px solid rgba(132, 229, 227, .11);
  border-radius: 50%;
  pointer-events: none;
}

.orbit-a { width: 540px; height: 540px; transform: translate(-50%, -50%); }
.orbit-b { width: 420px; height: 420px; transform: translate(-50%, -50%) rotate(22deg); border-style: dashed; }

#stage {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
}

#stage:active { cursor: grabbing; }

#stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 2;
}

.card-fallback {
  position: absolute;
  inset: 5% 11%;
  width: 78%;
  height: 90%;
  object-fit: contain;
  z-index: 1;
  filter: drop-shadow(0 28px 36px rgba(0, 0, 0, .34));
  transition: opacity .4s ease;
}

body.webgl-ready .card-fallback { opacity: 0; }

#loading {
  position: absolute;
  left: 50%;
  bottom: 5%;
  z-index: 4;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(222, 252, 248, .76);
  font-size: 11px;
  letter-spacing: .12em;
  white-space: nowrap;
}

#loading > span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #5eead4;
  box-shadow: 0 0 16px #5eead4;
  animation: pulse 1.25s ease-in-out infinite;
}

body.webgl-failed #loading {
  max-width: 80%;
  color: rgba(255, 255, 255, .82);
  white-space: normal;
  text-align: center;
}

.card-toolbar {
  min-height: 68px;
  margin: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
}

.card-toolbar p { margin: 0; display: flex; align-items: baseline; gap: 12px; }
.card-toolbar p b { color: var(--blue); font: 700 10px/1 Bahnschrift, sans-serif; letter-spacing: .16em; }
.card-toolbar p span { color: var(--subtle); font-size: 11px; }
.toolbar-actions { display: flex; gap: 8px; }

.toolbar-actions button {
  min-width: 44px;
  min-height: 44px;
  padding: 0 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: #415267;
  background: transparent;
  cursor: pointer;
}

.toolbar-actions button:hover,
.toolbar-actions button[aria-pressed="true"] { border-color: #c8d7e0; color: var(--blue); background: #fff; }
.toolbar-actions button span { font-size: 17px; }
.toolbar-actions button em { font-size: 11px; font-style: normal; }
.fallback-note { margin: 12px 18px 0; color: var(--muted); font-size: 12px; }

.principles {
  width: min(calc(100% - 48px), var(--max));
  margin: 88px auto 128px;
  padding-top: 44px;
  display: grid;
  grid-template-columns: minmax(270px, .82fr) minmax(0, 1.18fr);
  gap: clamp(70px, 10vw, 150px);
  border-top: 1px solid var(--line);
}

.section-intro h2,
.seed h2 {
  margin: 22px 0 18px;
  color: var(--ink-strong);
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 650;
  line-height: 1.23;
  letter-spacing: -.04em;
}

.section-intro > p:last-child {
  max-width: 470px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 2;
}

.principle-list { margin: 0; padding: 0; list-style: none; }

.principle-list li {
  min-height: 132px;
  padding: 28px 0;
  display: grid;
  grid-template-columns: 54px minmax(150px, .55fr) minmax(210px, 1fr);
  align-items: start;
  gap: 22px;
  border-top: 1px solid var(--line);
}

.principle-list li:last-child { border-bottom: 1px solid var(--line); }
.principle-list li > span { color: var(--blue); font: 600 10px/1.5 Bahnschrift, sans-serif; letter-spacing: .14em; }
.principle-list h3 { margin: 0; color: var(--ink); font-size: 19px; font-weight: 650; }
.principle-list p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }

.seed {
  width: min(calc(100% - 48px), var(--max));
  min-height: 440px;
  margin: 0 auto 84px;
  padding: clamp(44px, 6vw, 76px);
  position: relative;
  display: grid;
  grid-template-columns: .78fr 1fr .48fr;
  align-items: center;
  gap: clamp(32px, 6vw, 80px);
  overflow: hidden;
  border-radius: 32px;
  color: #e8fbf8;
  background:
    radial-gradient(circle at 17% 46%, rgba(45, 212, 191, .16), transparent 19rem),
    linear-gradient(128deg, #03141f, #062c3d 72%, #083344);
}

.seed::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image: linear-gradient(rgba(148, 232, 226, .10) 1px, transparent 1px), linear-gradient(90deg, rgba(148, 232, 226, .10) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(90deg, #000, transparent 78%);
}

.seed > * { position: relative; z-index: 1; }

.seed-signal {
  aspect-ratio: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #dffcf7;
  border: 1px solid rgba(148, 232, 226, .24);
  border-radius: 50%;
  font: 500 clamp(62px, 7vw, 105px)/1 Bahnschrift, sans-serif;
  letter-spacing: -.17em;
}

.seed-signal::before,
.seed-signal::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(125, 211, 252, .15);
  border-radius: 50%;
}

.seed-signal::before { inset: 12%; }
.seed-signal::after { inset: 27%; border-style: dashed; }
.seed-signal i { width: 5px; height: 5px; position: absolute; top: 11%; right: 24%; border-radius: 50%; background: #5eead4; box-shadow: 0 0 14px #5eead4; }
.seed-signal span:last-child { color: #7dd3fc; }
.seed .section-index { color: #8bd9db; }
.seed h2 { color: #f4fffd; font-family: Bahnschrift, "Segoe UI", sans-serif; letter-spacing: -.02em; }
.seed-lead { margin: 0 0 10px !important; color: #d9f6f2 !important; font-size: 18px !important; }
.seed-copy > p:not(.section-index) { max-width: 530px; margin: 0; color: #aac2c7; font-size: 14px; line-height: 1.9; }
.button-light { margin-top: 26px; color: var(--navy); background: #e4faf6; }
.button-light:hover { background: #fff; }

.seed-meta {
  align-self: end;
  padding-left: 20px;
  border-left: 1px solid rgba(182, 237, 235, .18);
}

.seed-meta span { display: block; margin-bottom: 10px; color: #6ea5ae; font: 600 9px/1 Bahnschrift, sans-serif; letter-spacing: .18em; }
.seed-meta strong { color: #dff9f6; font: 500 13px/1.4 Bahnschrift, sans-serif; letter-spacing: .03em; }

.site-footer {
  width: min(calc(100% - 48px), var(--max));
  min-height: 132px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 50px 1fr auto;
  align-items: center;
  gap: 18px;
  border-top: 1px solid var(--line);
}

.footer-mark { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid #b8c8d3; border-radius: 50%; color: var(--blue); font: 700 13px/1 Bahnschrift, sans-serif; }
.site-footer strong { display: block; color: var(--ink); font-size: 13px; }
.site-footer div > span { display: block; margin-top: 5px; color: var(--subtle); font: 500 8px/1 Bahnschrift, sans-serif; letter-spacing: .14em; }
.site-footer p { margin: 0; color: var(--subtle); font: 500 10px/1 Bahnschrift, sans-serif; letter-spacing: .1em; }

@keyframes pulse {
  0%, 100% { opacity: .45; transform: scale(.75); }
  50% { opacity: 1; transform: scale(1.1); }
}

@media (max-width: 1040px) {
  .hero { grid-template-columns: minmax(0, .86fr) minmax(430px, 1.14fr); gap: 34px; }
  h1 { font-size: clamp(42px, 5.4vw, 58px); }
  .principle-rail { gap: 10px; }
  .principle-rail dd { font-size: 11px; }
  .site-nav { display: none; }
  .seed { grid-template-columns: .62fr 1fr; }
  .seed-meta { display: none; }
}

@media (max-width: 900px) {
  .principles { display: block; }
  .principle-list { margin-top: 56px; }
}

@media (max-width: 780px) {
  :root { --header-height: 72px; }
  .header-inner, .hero, .principles, .seed, .site-footer { width: min(calc(100% - 32px), var(--max)); }
  .site-header { background: rgba(248, 250, 252, .92); backdrop-filter: blur(12px); position: sticky; top: 0; }
  .header-inner { gap: 14px; }
  .brand-mark { width: 40px; height: 40px; }
  .brand-name { font-size: 12px; }
  .brand-name small { font-size: 7px; }
  .header-cta { margin-left: auto; min-height: 44px; padding: 0 14px; font-size: 11px; }
  .header-cta span { display: none; }

  .hero {
    min-height: auto;
    padding: 58px 0 76px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 52px;
  }

  .hero-copy { padding: 0; }
  h1 { margin-top: 22px; font-size: clamp(43px, 12vw, 58px); }
  .hero-intro { font-size: 15px; line-height: 1.9; }
  .hero-actions { margin-top: 28px; }
  .principle-rail { margin-top: 42px; }
  .card-kicker { margin-left: 6px; margin-right: 6px; }
  .card-theatre { min-height: 560px; height: 68svh; max-height: 660px; border-radius: 28px; }
  .card-toolbar { margin: 0 6px; }
  .principles { margin-top: 28px; margin-bottom: 92px; display: block; }
  .section-intro { max-width: 610px; }
  .principle-list { margin-top: 56px; }
  .principle-list li { grid-template-columns: 42px .6fr 1fr; }
  .seed { min-height: auto; padding: 44px 34px; grid-template-columns: 1fr; border-radius: 26px; }
  .seed-signal { width: min(60vw, 260px); justify-self: center; }
  .seed-copy { text-align: left; }
  .site-footer { grid-template-columns: 44px 1fr; padding: 30px 0; }
  .site-footer p { grid-column: 2; }
}

@media (max-width: 520px) {
  .brand-name { max-width: 148px; white-space: normal; line-height: 1.25; }
  .brand-name small { display: none; }
  .header-cta { padding: 0 12px; }
  .eyebrow { font-size: 9px; }
  h1 { font-size: clamp(40px, 12vw, 52px); }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
  .principle-rail { grid-template-columns: 1fr; gap: 13px; }
  .principle-rail div { flex-direction: row; align-items: baseline; gap: 12px; }
  .card-theatre { min-height: 510px; height: 65svh; }
  .orbit-a { width: 400px; height: 400px; }
  .orbit-b { width: 310px; height: 310px; }
  .card-toolbar { min-height: 76px; align-items: center; }
  .card-toolbar p span { display: none; }
  .toolbar-actions button { padding: 0 10px; }
  .toolbar-actions button em { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .principle-list li { grid-template-columns: 40px 1fr; gap: 12px; }
  .principle-list p { grid-column: 2; }
  .seed { padding: 40px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}