:root {
  color-scheme: light;
  --paper: #f2efe7;
  --paper-2: #e9e5db;
  --ink: #102a43;
  --deep: #081a2b;
  --muted: #607080;
  --line: rgba(16, 42, 67, 0.18);
  --orange: #f36b36;
  --lime: #c7e66d;
  --white: #fff;
  --serif: Georgia, "Songti SC", "Noto Serif CJK SC", serif;
  --sans: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #081a2b;
  --paper-2: #102a43;
  --ink: #f2efe7;
  --deep: #020b14;
  --muted: #a4b4c1;
  --line: rgba(242, 239, 231, 0.19);
  --orange: #ff8050;
  --lime: #c7e66d;
  --white: #fff;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  background: var(--paper);
}
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  transition:
    background 0.35s,
    color 0.35s;
  scroll-snap-type: y mandatory;
  overscroll-behavior-y: none;
}
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E");
}
.shell {
  width: min(1240px, calc(100% - 112px));
  margin: 0 auto;
}
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.site-header {
  position: fixed;
  z-index: 40;
  top: 0;
  left: 0;
  right: 0;
  height: 84px;
  padding: 0 max(28px, calc((100vw - 1360px) / 2));
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}
.brand-mark {
  width: 48px;
  height: 48px;
  object-fit: contain;
}
.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-copy b {
  font: 700 18px var(--serif);
  letter-spacing: 0.1em;
}
.brand-copy small {
  margin-top: 6px;
  color: var(--muted);
  font: 600 8px var(--mono);
  letter-spacing: 0.13em;
}
.primary-nav {
  display: flex;
  gap: 30px;
}
.primary-nav a,
.text-link,
.site-footer a {
  color: var(--ink);
  text-decoration: none;
}
.primary-nav a {
  position: relative;
  font-size: 13px;
  font-weight: 800;
}
.primary-nav a:after {
  content: "";
  position: absolute;
  right: 100%;
  bottom: -9px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transition: right 0.25s;
}
.primary-nav a:hover:after {
  right: 0;
}
.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 8px;
}
.control {
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--line);
  height: 34px;
  padding: 0 8px;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
}
.control-icon {
  font: 700 12px var(--serif);
  color: var(--orange);
}
.control select {
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  font: 600 11px var(--sans);
  cursor: pointer;
}
.header-cta {
  padding: 11px 14px;
  color: var(--white);
  background: var(--ink);
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
  transition: 0.2s;
}
.header-cta:hover {
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink);
  padding: 10px 13px;
}
.menu {
  display: none;
}
.chapters {
  position: relative;
}
.chapter {
  position: relative;
  min-height: 100svh;
  padding: 124px 0 72px;
  display: flex;
  align-items: center;
  scroll-snap-align: start;
  isolation: isolate;
}
.chapter-grid {
  width: min(1240px, calc(100% - 112px));
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 70px;
}
.chapter-copy {
  max-width: 650px;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 0 0 28px;
  color: var(--muted);
  font: 700 11px var(--mono);
  letter-spacing: 0.17em;
}
.eyebrow i {
  display: block;
  width: 34px;
  height: 2px;
  background: var(--orange);
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1,
h2 {
  font: 700 clamp(46px, 6vw, 88px)/1.13 var(--serif);
  letter-spacing: -0.055em;
}
h1 {
  max-width: 700px;
  margin-bottom: 30px;
}
h1 span,
h2 em {
  color: var(--orange);
  font-style: normal;
}
h2 {
  font-size: clamp(44px, 5.6vw, 78px);
  margin-bottom: 28px;
}
.lead {
  max-width: 570px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.95;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.button {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 14px 17px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
  transition:
    transform 0.25s,
    background 0.25s,
    color 0.25s;
}
.button:hover {
  transform: translate(-3px, -3px);
}
.button b {
  font: 700 17px var(--mono);
}
.button-primary {
  color: var(--white);
  background: var(--ink);
  box-shadow: 7px 7px 0 var(--orange);
}
.button-ghost {
  color: var(--ink);
  border: 1px solid var(--ink);
}
.button-accent {
  color: var(--deep);
  background: var(--lime);
  box-shadow: 7px 7px 0 var(--orange);
}
.button-light {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.52);
}
.hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 31px;
  color: var(--muted);
  font: 600 10px var(--mono);
}
.hero-notes span:before {
  content: "◇";
  margin-right: 7px;
  color: var(--orange);
}
.chapter-art {
  position: relative;
  min-height: 530px;
  display: grid;
  place-items: center;
}
.hero-art {
  min-height: 570px;
}
.art-orbit {
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 50%;
  transform: rotate(-18deg);
}
.orbit-one {
  width: 500px;
  height: 500px;
}
.orbit-two {
  width: 350px;
  height: 570px;
  border-color: color-mix(in srgb, var(--orange) 55%, transparent);
}
.art-card {
  position: relative;
  z-index: 2;
  width: 330px;
  height: 410px;
  padding: 25px;
  color: var(--white);
  background: var(--ink);
  box-shadow: 17px 17px 0 var(--orange);
  transform: rotate(4deg);
  display: flex;
  flex-direction: column;
}
.art-card-top,
.art-card-bottom {
  font: 700 10px var(--mono);
  letter-spacing: 0.14em;
}
.hero-glyph {
  margin: 28px 0 5px;
  font: 700 190px/0.85 var(--serif);
  color: var(--lime);
  opacity: 0.96;
}
.art-card strong {
  font: 800 25px/0.9 var(--mono);
  letter-spacing: -0.08em;
}
.art-card-bottom {
  margin-top: auto;
  color: #9db1bd;
}
.float-tag {
  position: absolute;
  z-index: 3;
  padding: 10px 13px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 4px 4px 0 var(--orange);
  font: 800 10px var(--mono);
  transform: rotate(-7deg);
}
.tag-one {
  top: 105px;
  right: 43px;
}
.tag-two {
  right: 10px;
  bottom: 117px;
  transform: rotate(7deg);
}
.tag-three {
  left: 58px;
  bottom: 70px;
  transform: rotate(3deg);
}
.text-link {
  display: inline-flex;
  gap: 15px;
  margin-top: 32px;
  padding-bottom: 9px;
  border-bottom: 2px solid var(--orange);
  font: 800 13px var(--mono);
}
.art-right {
  order: 2;
}
.art-left {
  order: 0;
}
.network-art {
  position: relative;
  width: 520px;
  height: 440px;
}
.node {
  position: absolute;
  display: grid;
  place-items: center;
  text-align: center;
  border: 1px solid var(--ink);
  background: var(--paper);
  font: 800 11px var(--mono);
  box-shadow: 6px 6px 0 var(--orange);
}
.node-app {
  left: 5px;
  top: 174px;
  width: 95px;
  height: 95px;
}
.node-core {
  left: 195px;
  top: 135px;
  width: 145px;
  height: 145px;
  color: var(--white);
  background: var(--ink);
  border-radius: 50%;
  box-shadow: 0 0 0 13px color-mix(in srgb, var(--orange) 30%, transparent);
}
.node-core b {
  font: 800 48px var(--serif);
  color: var(--lime);
}
.node-core small {
  font: 700 9px var(--mono);
  letter-spacing: 0.14em;
}
.node-gpt {
  right: 15px;
  top: 58px;
  width: 115px;
  height: 54px;
}
.node-claude {
  right: 5px;
  top: 195px;
  width: 130px;
  height: 60px;
}
.node-gemini {
  right: 55px;
  bottom: 34px;
  width: 120px;
  height: 56px;
}
.connector {
  position: absolute;
  height: 1px;
  background: var(--orange);
  transform-origin: left;
}
.c-a {
  left: 99px;
  top: 222px;
  width: 100px;
  transform: rotate(-16deg);
}
.c-b {
  left: 338px;
  top: 185px;
  width: 105px;
  transform: rotate(-28deg);
}
.c-c {
  left: 338px;
  top: 253px;
  width: 115px;
  transform: rotate(23deg);
}
.art-caption {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: flex-end;
  font: 700 11px var(--mono);
}
.art-caption b {
  color: var(--lime);
  font-size: 22px;
}
.stack-art {
  width: min(540px, 100%);
  position: relative;
  padding: 40px 0 0;
}
.stack-line {
  position: relative;
  display: grid;
  grid-template-columns: 85px 1fr 40px;
  align-items: center;
  height: 88px;
  padding: 0 22px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper-2) 70%, transparent);
  font: 700 11px var(--mono);
  box-shadow: 9px 9px 0 var(--ink);
  transform: skewY(-3deg);
}
.stack-line b {
  color: var(--orange);
}
.stack-line i {
  font-size: 22px;
  text-align: right;
  font-style: normal;
}
.line-b {
  margin-left: 42px;
  transform: skewY(3deg);
  background: var(--ink);
  color: var(--white);
  box-shadow: 9px 9px 0 var(--orange);
}
.line-c {
  margin-left: 84px;
  transform: skewY(-3deg);
}
.stack-ruler {
  position: absolute;
  top: 0;
  right: 0;
  color: var(--muted);
  font: 700 10px var(--mono);
  writing-mode: vertical-rl;
}
.feature-list {
  display: grid;
  gap: 11px;
  margin-top: 32px;
}
.feature-list span {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.feature-list span:before {
  content: "+";
  margin-right: 12px;
  color: var(--orange);
  font: 700 17px var(--mono);
}
.portrait-art {
  position: relative;
  width: 410px;
  height: 510px;
  overflow: hidden;
  background: var(--ink);
  box-shadow: 18px 18px 0 var(--orange);
  transform: rotate(-4deg);
}
.portrait-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      90deg,
      transparent 49.5%,
      rgba(199, 230, 109, 0.4) 50%,
      transparent 50.5%
    ),
    linear-gradient(
      transparent 49.5%,
      rgba(199, 230, 109, 0.4) 50%,
      transparent 50.5%
    );
  background-size: 78px 78px;
  opacity: 0.55;
}
.portrait-head {
  position: absolute;
  left: 103px;
  top: 76px;
  width: 210px;
  height: 300px;
  border: 2px solid var(--lime);
  border-radius: 48% 48% 42% 42%;
  transform: rotate(8deg);
}
.portrait-head:before {
  content: "";
  position: absolute;
  inset: 15px;
  border: 1px dashed var(--orange);
  border-radius: 50%;
}
.portrait-head i {
  position: absolute;
  top: 105px;
  width: 27px;
  height: 5px;
  background: var(--lime);
}
.portrait-head i:first-child {
  left: 48px;
}
.portrait-head i:nth-child(2) {
  right: 48px;
}
.portrait-head b {
  position: absolute;
  left: 84px;
  top: 155px;
  width: 38px;
  height: 67px;
  border: 2px solid var(--orange);
  border-top: 0;
  border-radius: 0 0 50% 50%;
}
.portrait-label {
  position: absolute;
  bottom: 28px;
  left: 28px;
  color: var(--lime);
  font: 700 13px/1.2 var(--mono);
}
.portrait-scan {
  position: absolute;
  top: 48%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--orange);
  box-shadow:
    0 -10px 0 rgba(243, 107, 54, 0.25),
    0 10px 0 rgba(243, 107, 54, 0.25);
  animation: scan 4s ease-in-out infinite;
}
.quote-mark {
  margin-top: 35px;
  color: var(--orange);
  font: 700 95px/0.5 Georgia;
}
.side-quote {
  max-width: 340px;
  color: var(--muted);
  font: 600 15px/1.8 var(--serif);
}
.radar-art {
  position: relative;
  width: 470px;
  height: 470px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
}
.radar-art:before,
.radar-art:after {
  content: "";
  position: absolute;
  background: var(--line);
}
.radar-art:before {
  width: 100%;
  height: 1px;
}
.radar-art:after {
  height: 100%;
  width: 1px;
}
.radar-circle {
  width: 290px;
  height: 290px;
  border: 1px solid var(--orange);
  border-radius: 50%;
  box-shadow:
    0 0 0 45px color-mix(in srgb, var(--orange) 10%, transparent),
    0 0 0 100px color-mix(in srgb, var(--orange) 6%, transparent);
}
.radar-sweep {
  position: absolute;
  width: 50%;
  height: 2px;
  left: 50%;
  top: 50%;
  background: linear-gradient(90deg, var(--lime), transparent);
  transform-origin: left;
  animation: radar 5s linear infinite;
}
.radar-dot {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--lime) 25%, transparent);
}
.dot-a {
  top: 102px;
  right: 125px;
}
.dot-b {
  bottom: 145px;
  left: 110px;
  background: var(--orange);
}
.dot-c {
  top: 215px;
  right: 68px;
}
.radar-art > b {
  position: absolute;
  font: 800 65px var(--mono);
  color: var(--ink);
  background: var(--paper);
  padding: 8px;
}
.radar-art > small {
  position: absolute;
  bottom: 28px;
  color: var(--muted);
  font: 700 9px var(--mono);
  letter-spacing: 0.17em;
}
.metric-row {
  display: flex;
  gap: 30px;
  margin-top: 35px;
}
.metric-row div {
  display: grid;
  gap: 7px;
}
.metric-row b {
  color: var(--orange);
  font: 800 12px var(--mono);
}
.metric-row span {
  color: var(--muted);
  font-size: 11px;
}
.process-wrap {
  width: min(1240px, calc(100% - 112px));
}
.process-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 70px;
  border-top: 1px solid var(--ink);
}
.process-step {
  min-height: 190px;
  padding: 25px 25px 10px 0;
  border-right: 1px solid var(--line);
}
.process-step:not(:first-child) {
  padding-left: 25px;
}
.process-step:last-child {
  border-right: 0;
}
.process-step > b {
  color: var(--orange);
  font: 800 12px var(--mono);
}
.process-step h3 {
  margin: 45px 0 10px;
  font: 700 26px var(--serif);
}
.process-step p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.contact-chapter {
  color: var(--white);
  background: var(--deep);
}
.contact-chapter .eyebrow,
.contact-chapter .lead {
  color: #a9bac6;
}
.contact-wrap {
  width: min(1240px, calc(100% - 112px));
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 80px;
}
.contact-art {
  position: relative;
  min-height: 440px;
  display: grid;
  place-items: center;
  text-align: center;
}
.contact-ring {
  position: absolute;
  width: 390px;
  height: 390px;
  border: 1px solid rgba(199, 230, 109, 0.55);
  border-radius: 50%;
  box-shadow:
    0 0 0 35px rgba(199, 230, 109, 0.07),
    0 0 0 95px rgba(243, 107, 54, 0.08);
}
.contact-art > b {
  position: relative;
  font: 800 150px/0.8 var(--serif);
  color: var(--lime);
}
.contact-art > span,
.contact-art > small {
  position: absolute;
  font: 700 10px var(--mono);
  letter-spacing: 0.17em;
}
.contact-art > span {
  bottom: 82px;
  color: #a9bac6;
}
.contact-art > small {
  bottom: 45px;
  color: var(--orange);
  letter-spacing: 0;
}
.site-footer {
  position: absolute;
  right: 0;
  bottom: 28px;
  left: 0;
  display: flex;
  gap: 30px;
  align-items: center;
  color: #8194a1;
  font: 600 10px var(--mono);
  letter-spacing: 0.08em;
}
.site-footer a {
  margin-left: auto;
  color: var(--lime);
}
.light {
  color: #a9bac6;
}
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.8s var(--ease),
    transform 0.8s var(--ease);
  transition-delay: var(--delay, 0ms);
}
.chapter.is-active .reveal {
  opacity: 1;
  transform: translateY(0);
}
.reveal:nth-child(2) {
  --delay: 100ms;
}
.reveal:nth-child(3) {
  --delay: 180ms;
}
.chapter-rail {
  position: fixed;
  z-index: 35;
  right: 25px;
  top: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 17px;
  transform: translateY(-50%);
}
.rail-label {
  display: grid;
  justify-items: center;
  gap: 10px;
  color: var(--muted);
  font: 700 8px var(--mono);
  letter-spacing: 0.12em;
}
.rail-label i {
  height: 32px;
  width: 1px;
  background: var(--line);
}
.rail-label b {
  color: var(--orange);
  font-size: 15px;
}
.rail-list {
  display: grid;
  gap: 11px;
}
.rail-dot {
  position: relative;
  width: 8px;
  height: 8px;
  padding: 0;
  border: 1px solid var(--muted);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: 0.25s;
}
.rail-dot:after {
  content: attr(aria-label);
  position: absolute;
  right: 19px;
  top: -5px;
  white-space: nowrap;
  color: var(--muted);
  font: 600 9px var(--mono);
  opacity: 0;
  pointer-events: none;
  transition: 0.2s;
}
.rail-dot:hover:after,
.rail-dot.is-active:after {
  opacity: 1;
}
.rail-dot.is-active {
  border-color: var(--orange);
  background: var(--orange);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--orange) 22%, transparent);
}
.rail-count {
  display: grid;
  justify-items: center;
  color: var(--muted);
  font: 700 12px var(--mono);
}
.rail-count small {
  margin-top: 5px;
  font-size: 7px;
  writing-mode: vertical-rl;
  letter-spacing: 0.12em;
}
@keyframes scan {
  0%,
  100% {
    transform: translateY(-120px);
    opacity: 0.2;
  }
  50% {
    transform: translateY(120px);
    opacity: 1;
  }
}
@keyframes radar {
  to {
    transform: rotate(360deg);
  }
}