:root {
  color-scheme: light;
  --paper: #f7f7f3;
  --surface: #ffffff;
  --ink: #1d2321;
  --muted: #626c67;
  --line: #d8ddd8;
  --blue: #2f6f9f;
  --blue-soft: #e8f1f7;
  --green: #3f7c59;
  --green-soft: #e9f3ec;
  --yellow: #a86f12;
  --yellow-soft: #f7efd9;
  --red: #b54740;
  --red-soft: #faece9;
  --violet: #8a5a83;
  --violet-soft: #f2eaf0;
  --tech: #11171a;
  --tech-line: #354249;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-underline-offset: 4px; }
a:hover { color: var(--blue); }
a:focus-visible { outline: 3px solid #d49a2b; outline-offset: 3px; }

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .86em;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 10;
  background: var(--ink);
  color: var(--surface);
  padding: 8px 12px;
}

.skip-link:focus { top: 12px; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(247, 247, 243, .95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  font-weight: 700;
  text-decoration: none;
}

nav { display: flex; gap: 24px; }
nav a { color: var(--muted); font-size: 14px; text-decoration: none; }

.intro {
  padding: 84px 0 72px;
  border-bottom: 1px solid var(--line);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  gap: 80px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 16px;
  max-width: 720px;
  font-size: 76px;
  line-height: 1.06;
  letter-spacing: 0;
  text-wrap: balance;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 21px;
}

.verdict {
  display: grid;
  grid-template-columns: 5px 1fr;
  gap: 18px;
  align-items: stretch;
}

.verdict-mark { background: var(--red); }
.verdict p { margin: 0; font-size: 17px; }

section { padding: 88px 0; scroll-margin-top: 68px; }

.snapshot,
.capabilities,
.module-section,
.roadmap { background: var(--surface); }

.future-overview { background: #edf0ed; }
.intelligent-section { background: var(--paper); }
.governance-section { background: #eef3f1; }

.section-heading {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  align-items: start;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin-bottom: 4px;
  font-size: 32px;
  line-height: 1.2;
  text-wrap: balance;
}

.section-heading p:not(.section-index) { margin: 0; color: var(--muted); }

.section-index {
  margin: 6px 0 0;
  color: var(--blue);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
}

.compact-heading { margin-bottom: 28px; }

.metrics {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  margin: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metrics div {
  min-height: 116px;
  padding: 24px 18px;
  border-right: 1px solid var(--line);
}

.metrics div:last-child { border-right: 0; }
.metrics dt { color: var(--muted); font-size: 13px; }
.metrics dd { margin: 12px 0 0; font-size: 24px; font-weight: 750; line-height: 1.2; }
.metrics .metric-alert dd { color: var(--red); }

.positioning {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 60px;
  margin-top: 34px;
  align-items: start;
}

.positioning > p { margin: 0; font-size: 18px; }
.score-line { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; color: var(--muted); font-size: 14px; }
.score-line b { color: var(--ink); }

.diagram-section { border-bottom: 1px solid var(--line); }
.flow-section { background: #f2f4f2; }

.diagram-frame {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.diagram-frame picture,
.diagram-frame img { display: block; width: 100%; height: auto; }

.diagram-frame figcaption {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.diagram-frame figcaption a { flex: 0 0 auto; color: var(--blue); font-weight: 700; }

.architecture-notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.architecture-notes article { padding: 24px 32px 0 0; }
.architecture-notes h3 { margin-bottom: 8px; font-size: 17px; }
.architecture-notes p { margin: 0; color: var(--muted); font-size: 14px; }

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.capability-grid article {
  padding: 26px 28px 28px;
  border-right: 1px solid var(--line);
}

.capability-grid article:last-child { border-right: 0; }
.capability-number { margin-bottom: 8px; color: var(--green); font-size: 34px; font-weight: 800; line-height: 1; }
.capability-grid h3 { margin-bottom: 14px; font-size: 18px; }
.capability-grid ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.capability-grid li + li { margin-top: 5px; }
.boundary-note { max-width: 920px; margin: 28px 0 0; color: var(--muted); }

.target-note {
  max-width: 980px;
  margin: -4px 0 28px;
  padding: 14px 18px;
  border-left: 4px solid var(--yellow);
  background: var(--yellow-soft);
  color: var(--muted);
  font-size: 14px;
}

.future-frame {
  background: var(--tech);
  border-color: var(--tech-line);
}

.future-frame figcaption {
  background: #171e22;
  border-top-color: var(--tech-line);
  color: #b5c0bc;
}

.future-frame figcaption a { color: #77c99a; }
.future-notes { border-top-color: #cbd2cd; }

.flow-principles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

.flow-principles article { padding: 24px 24px 0 0; }
.flow-principles span {
  display: block;
  margin-bottom: 12px;
  color: var(--green);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
}
.flow-principles h3 { margin-bottom: 8px; font-size: 17px; }
.flow-principles p { margin: 0; color: var(--muted); font-size: 14px; }

.module-legend {
  display: flex;
  gap: 24px;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 13px;
}

.module-legend span::before {
  content: "";
  display: inline-block;
  width: 26px;
  margin-right: 8px;
  border-top: 3px solid;
  vertical-align: 3px;
}

.status-reuse::before { border-color: var(--blue) !important; }
.status-new::before { border-color: var(--green) !important; }
.status-gate::before { border-color: var(--yellow) !important; }

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.module-card {
  min-width: 0;
  min-height: 196px;
  padding: 22px;
  border: 1px solid var(--line);
  border-top-width: 3px;
  border-radius: 6px;
  background: var(--surface);
}

.module-new { border-top-color: var(--green); }
.module-reuse { border-top-color: var(--blue); }
.module-gate { border-top-color: var(--yellow); }
.module-meta {
  margin-bottom: 16px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
}
.module-new .module-meta { color: var(--green); }
.module-reuse .module-meta { color: var(--blue); }
.module-gate .module-meta { color: var(--yellow); }
.module-card h3 { margin-bottom: 8px; font-size: 18px; }
.module-card > p:last-child { margin: 0; color: var(--muted); font-size: 14px; }

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.principle-grid article { padding: 26px 32px 28px 0; }
.principle-grid article + article { padding-left: 32px; border-left: 1px solid var(--line); }
.principle-id {
  margin-bottom: 13px;
  color: var(--violet);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
}
.principle-grid h3 { margin-bottom: 8px; font-size: 18px; }
.principle-grid article > p:last-child { margin: 0; color: var(--muted); font-size: 14px; }

.subsection-title { margin: 54px 0 18px; font-size: 22px; }
.table-wrap { width: 100%; overflow-x: auto; }
.architecture-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  font-size: 14px;
  text-align: left;
}
.architecture-table th,
.architecture-table td {
  padding: 16px 18px;
  border: 1px solid var(--line);
  vertical-align: top;
}
.architecture-table th { background: #e4eae7; color: var(--ink); font-size: 12px; }
.architecture-table th:first-child { width: 20%; }
.architecture-table th:nth-child(2) { width: 44%; }
.mapping-table th { width: 33.333% !important; }
.architecture-table td { color: var(--muted); }
.architecture-table td:first-child { color: var(--ink); font-weight: 700; }

.assessment { background: var(--ink); color: #f6f7f4; }
.assessment .section-heading p:not(.section-index) { color: #aeb8b2; }
.assessment .section-index { color: #8fc2e5; }

.assessment-layout {
  display: grid;
  grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
  gap: 72px;
}

.strength-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid #46504b; }
.strength-list li { display: grid; grid-template-columns: 34px 1fr; gap: 16px; padding: 22px 0; border-bottom: 1px solid #46504b; }
.strength-list > li > span { color: #8fc2e5; font-family: "SFMono-Regular", Consolas, monospace; font-size: 12px; }
.strength-list h3 { margin-bottom: 5px; font-size: 17px; }
.strength-list p { margin: 0; color: #aeb8b2; font-size: 14px; }

.risk { padding: 23px 0 24px; border-top: 1px solid #46504b; }
.risk:last-child { border-bottom: 1px solid #46504b; }
.risk-meta { display: flex; gap: 12px; align-items: center; margin-bottom: 10px; }
.risk-meta span { min-width: 34px; font-size: 12px; font-weight: 800; }
.risk-meta code { color: #aeb8b2; }
.risk-p0 .risk-meta span { color: #ff938a; }
.risk-p1 .risk-meta span { color: #f1c96e; }
.risk-p2 .risk-meta span { color: #8fc2e5; }
.risk h3 { margin-bottom: 7px; font-size: 18px; }
.risk p { margin: 0; color: #bac2bd; font-size: 14px; }

.roadmap-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 3px solid var(--ink);
}

.roadmap-track li { position: relative; padding: 30px 38px 0 0; }
.roadmap-track li::before { content: ""; position: absolute; width: 13px; height: 13px; top: -8px; left: 0; border: 2px solid var(--ink); border-radius: 50%; background: var(--surface); }
.roadmap-time { margin-bottom: 16px; color: var(--blue); font-family: "SFMono-Regular", Consolas, monospace; font-size: 13px; font-weight: 700; }
.roadmap-track h3 { margin-bottom: 8px; font-size: 19px; }
.roadmap-track li > p:last-child { margin: 0; color: var(--muted); font-size: 14px; }

.verification { padding: 70px 0; border-top: 1px solid var(--line); }
.verification-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: 70px; }
.verification h2 { font-size: 30px; }
.verification-grid > div:last-child { border-top: 1px solid var(--line); padding-top: 18px; }
.verification-grid > div:last-child p { margin-bottom: 12px; color: var(--muted); font-size: 14px; }

footer { padding: 30px 0; background: var(--ink); color: #aeb8b2; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; }
.footer-inner p { margin: 0; font-size: 12px; }

@media (max-width: 900px) {
  h1 { font-size: 56px; }
  .intro-grid,
  .positioning,
  .assessment-layout,
  .verification-grid { grid-template-columns: 1fr; gap: 36px; }
  .metrics { grid-template-columns: repeat(3, 1fr); }
  .metrics div:nth-child(3) { border-right: 0; }
  .metrics div:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .capability-grid article:nth-child(2) { border-right: 0; }
  .capability-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .architecture-notes { grid-template-columns: 1fr; }
  .architecture-notes article { padding-right: 0; }
  .flow-principles,
  .module-grid,
  .roadmap-track { grid-template-columns: 1fr 1fr; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-grid article + article { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 620px) {
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { min-height: 52px; }
  nav { gap: 13px; }
  nav a { font-size: 12px; }
  .brand { font-size: 13px; }
  nav .nav-secondary { display: none; }
  .intro { padding: 58px 0 50px; }
  h1 { font-size: 43px; }
  .subtitle { font-size: 17px; }
  section { padding: 64px 0; }
  .section-heading { grid-template-columns: 38px 1fr; gap: 10px; }
  .section-heading h2 { font-size: 27px; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metrics div { min-height: 100px; padding: 19px 15px; }
  .metrics div:nth-child(2n) { border-right: 0; }
  .metrics div:nth-child(3) { border-right: 1px solid var(--line); }
  .metrics div:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .metrics dd { font-size: 20px; }
  .score-line { grid-template-columns: 1fr; }
  .diagram-frame { margin-inline: -7px; }
  .diagram-frame figcaption { display: grid; gap: 8px; }
  .diagram-frame figcaption a { justify-self: start; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid article { border-right: 0; border-bottom: 1px solid var(--line); }
  .capability-grid article:last-child { border-bottom: 0; }
  .assessment-layout { gap: 58px; }
  .flow-principles,
  .module-grid { grid-template-columns: 1fr; }
  .flow-principles article { padding-right: 0; }
  .module-legend { display: grid; gap: 8px; }
  .module-card { min-height: 0; }
  .architecture-table { min-width: 720px; }
  .subsection-title { margin-top: 42px; }
  .roadmap-track { grid-template-columns: 1fr; border-top: 0; border-left: 3px solid var(--ink); margin-left: 7px; }
  .roadmap-track li { padding: 0 0 42px 30px; }
  .roadmap-track li:last-child { padding-bottom: 0; }
  .roadmap-track li::before { top: 4px; left: -8px; }
  .footer-inner { display: grid; }
}

@media print {
  .site-header { position: static; }
  nav, .diagram-frame figcaption a { display: none; }
  body { background: #fff; }
  section { break-inside: avoid; }
  .assessment { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
}