:root {
  --paper: #f1ede3;
  --paper-deep: #e5dece;
  --ink: #172338;
  --ink-soft: #465166;
  --red: #b7392f;
  --line: rgba(23, 35, 56, 0.18);
  --white: #fbfaf6;
  --serif: "Noto Serif SC", "Songti SC", SimSun, serif;
  --sans: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 5%, rgba(255,255,255,.72), transparent 28rem),
    var(--paper);
  font-family: var(--sans);
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: .28;
  background-image: repeating-linear-gradient(0deg, transparent 0 31px, rgba(35,51,76,.07) 31px 32px);
}
a { color: inherit; }
button { font: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(20px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
  background: rgba(241,237,227,.88);
  backdrop-filter: blur(14px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
}
.brand__year {
  padding: 6px 9px;
  color: var(--white);
  background: var(--ink);
  letter-spacing: .08em;
}
nav { display: flex; gap: clamp(15px, 3vw, 36px); }
nav a {
  font-size: 13px;
  text-decoration: none;
}
nav a:hover { color: var(--red); }
.platform-link { padding-left: clamp(15px, 2vw, 28px); border-left: 1px solid var(--line); font-weight: 700; }
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(330px, .72fr);
  align-items: center;
  gap: clamp(36px, 7vw, 110px);
  min-height: calc(100vh - 62px);
  padding: 8vh clamp(24px, 8vw, 130px);
  overflow: hidden;
}
.hero::after {
  position: absolute;
  right: -1vw;
  bottom: -9vw;
  z-index: -1;
  content: "02";
  color: rgba(23,35,56,.045);
  font: 900 clamp(220px, 33vw, 520px)/.8 Arial, sans-serif;
}
.eyebrow {
  margin: 0 0 22px;
  color: var(--red);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .25em;
  text-transform: uppercase;
}
h1, h2, .epilogue strong {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: -.045em;
}
h1 { font-size: clamp(52px, 7.2vw, 112px); line-height: .98; }
h1 em { color: var(--red); font-style: normal; }
.lead {
  max-width: 650px;
  margin: 34px 0;
  color: var(--ink-soft);
  font: clamp(17px, 1.5vw, 22px)/1.9 var(--serif);
}
.result {
  display: flex;
  align-items: center;
  gap: 18px;
  width: fit-content;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
  line-height: 1.7;
}
.result__number {
  font: 900 48px/1 Arial, sans-serif;
  color: var(--red);
}
.result strong { color: var(--red); }
.hero__manuscript {
  margin: 0;
  padding: 16px;
  transform: rotate(1.8deg);
  border: 1px solid rgba(23,35,56,.2);
  background: #fff;
  box-shadow: 22px 28px 60px rgba(33,28,19,.18);
}
.hero__manuscript img {
  display: block;
  width: 100%;
  max-height: 70vh;
  object-fit: cover;
  object-position: top;
  filter: contrast(1.04);
}
.hero__manuscript figcaption {
  display: flex;
  justify-content: space-between;
  padding-top: 12px;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: .08em;
}
.hero__note {
  position: absolute;
  right: 3vw;
  top: 15%;
  margin: 0;
  transform: rotate(4deg);
  color: var(--red);
  font: italic 16px/1.5 Georgia, serif;
}
.section {
  padding: clamp(90px, 12vw, 180px) clamp(24px, 8vw, 130px);
  border-top: 1px solid var(--line);
}
.story, .warnings {
  display: grid;
  grid-template-columns: minmax(280px, .9fr) minmax(360px, 1fr);
  gap: clamp(50px, 10vw, 160px);
}
.section-heading h2 { font-size: clamp(40px, 5vw, 76px); line-height: 1.12; }
.section-heading--wide { max-width: 920px; }
.section-heading--wide > p:last-child {
  max-width: 560px;
  color: var(--ink-soft);
  line-height: 1.8;
}
.story__body {
  color: var(--ink-soft);
  font: 18px/1.9 var(--serif);
}
.story__body > p:first-child::first-letter {
  float: left;
  margin: 7px 9px 0 0;
  color: var(--red);
  font: 700 66px/.72 var(--serif);
}
.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 42px;
}
.facts div { border-top: 1px solid var(--ink); padding-top: 13px; }
.facts strong { display: block; font: 800 32px/1 Arial; }
.facts span { font-size: 12px; }
.model { background: var(--ink); color: var(--white); }
.model .eyebrow { color: #ee6a5f; }
.model .section-heading--wide > p:last-child { color: rgba(251,250,246,.64); }
.pipeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-top: 72px;
  border-top: 1px solid rgba(255,255,255,.18);
  border-bottom: 1px solid rgba(255,255,255,.18);
}
.pipeline__step {
  padding: 24px 10px;
  border: 0;
  border-right: 1px solid rgba(255,255,255,.18);
  color: rgba(255,255,255,.58);
  background: transparent;
  cursor: pointer;
}
.pipeline__step:last-child { border-right: 0; }
.pipeline__step span { display: block; margin-bottom: 7px; font-size: 10px; letter-spacing: .14em; }
.pipeline__step.is-active { color: var(--white); background: var(--red); }
.model-panel {
  display: grid;
  grid-template-columns: .36fr 1fr;
  column-gap: 54px;
  padding: 54px 0 70px;
}
.model-panel__tag, .evidence {
  margin: 0;
  color: #ee6a5f;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
}
.model-panel h3 {
  margin: 0 0 14px;
  font: 700 clamp(29px, 3vw, 48px)/1.2 var(--serif);
}
.model-panel > p:nth-of-type(2) {
  grid-column: 2;
  max-width: 760px;
  margin: 0;
  color: rgba(255,255,255,.7);
  font: 17px/1.8 var(--serif);
}
.rule-list {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
.rule-list span {
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  font-size: 12px;
}
.model-panel .evidence { grid-column: 2; margin-top: 24px; color: rgba(255,255,255,.38); }
.operators {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255,255,255,.18);
  border-left: 1px solid rgba(255,255,255,.18);
}
.operators article {
  min-height: 210px;
  padding: 28px;
  border-right: 1px solid rgba(255,255,255,.18);
  border-bottom: 1px solid rgba(255,255,255,.18);
}
.operators article > span { color: #ee6a5f; font-size: 11px; }
.operators h3 { margin: 38px 0 10px; font: 700 23px var(--serif); }
.operators p { margin: 0; color: rgba(255,255,255,.54); line-height: 1.7; font-size: 14px; }
.warning-stack { display: grid; gap: 18px; }
blockquote {
  margin: 0;
  padding: 26px 30px;
  border-left: 4px solid var(--red);
  background: rgba(255,255,255,.46);
  font: 700 clamp(20px, 2vw, 29px)/1.5 var(--serif);
}
blockquote cite {
  display: block;
  margin-top: 10px;
  color: var(--ink-soft);
  font: normal 12px/1.5 var(--sans);
}
.manuscript { background: var(--paper-deep); }
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 2.5vw, 34px);
  margin-top: 62px;
}
.gallery button {
  position: relative;
  padding: 10px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 14px 30px rgba(52,42,29,.08);
  cursor: zoom-in;
  transition: transform .25s ease, box-shadow .25s ease;
}
.gallery button:nth-child(2n) { transform: translateY(28px) rotate(1deg); }
.gallery button:hover { transform: translateY(-5px) rotate(-.5deg); box-shadow: 0 20px 45px rgba(52,42,29,.18); }
.gallery img { display: block; width: 100%; aspect-ratio: 4/5; object-fit: cover; object-position: top; }
.gallery span {
  display: block;
  padding: 13px 5px 5px;
  text-align: left;
  color: var(--ink-soft);
  font-size: 12px;
}
.epilogue {
  padding: clamp(110px, 16vw, 240px) clamp(24px, 13vw, 210px);
  color: var(--white);
  background: var(--red);
}
.epilogue .eyebrow { color: rgba(255,255,255,.65); }
.epilogue > p:nth-child(2) {
  max-width: 760px;
  color: rgba(255,255,255,.7);
  font: 18px/1.9 var(--serif);
}
.epilogue strong { display: block; margin-top: 50px; font-size: clamp(38px, 5.5vw, 82px); line-height: 1.16; }
footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(24px, 8vw, 130px);
  color: rgba(255,255,255,.55);
  background: #111a2a;
  font-size: 11px;
  letter-spacing: .08em;
}
dialog {
  width: min(92vw, 1050px);
  max-height: 94vh;
  padding: 14px;
  border: 0;
  background: #fff;
  box-shadow: 0 25px 80px rgba(0,0,0,.45);
}
dialog::backdrop { background: rgba(7,12,20,.78); backdrop-filter: blur(5px); }
dialog img { display: block; width: 100%; max-height: 84vh; object-fit: contain; }
dialog p { margin: 12px 0 2px; color: var(--ink-soft); text-align: center; font-size: 12px; }
#closeViewer {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: rgba(23,35,56,.85);
  font-size: 28px;
  cursor: pointer;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 12vh; }
  .hero__manuscript { width: min(100%, 580px); }
  .hero__note { display: none; }
  .story, .warnings { grid-template-columns: 1fr; }
  .operators { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  nav a:first-child { display: none; }
  .hero { padding-inline: 20px; }
  .section { padding-inline: 20px; }
  .facts { grid-template-columns: 1fr; }
  .pipeline { overflow-x: auto; grid-template-columns: repeat(5, minmax(96px, 1fr)); }
  .model-panel { display: block; }
  .model-panel h3 { margin-top: 18px; }
  .model-panel > p:nth-of-type(2), .model-panel .evidence, .rule-list { grid-column: auto; }
  .operators { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .gallery button:nth-child(2n) { transform: none; }
  footer { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}
footer a { color: var(--white); text-underline-offset: 3px; }