:root {
  color-scheme: light;
  --paper: #f7f8fa;
  --white: #ffffff;
  --ink: #14171b;
  --muted: #5f6875;
  --line: #d9dde3;
  --line-strong: #aab1bc;
  --blue: #1f57d6;
  --green: #087a5b;
  --red: #c83c2f;
  --amber: #a96800;
  --soft-blue: #eaf0ff;
  --soft-green: #e7f5ef;
  --soft-red: #fff0ed;
  --max: 1180px;
  --sans: "Avenir Next", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --serif: "Songti SC", "STSong", serif;
  --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-160%);
}

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

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgb(247 248 250 / 94%);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
  font-family: var(--mono);
  font-size: 12px;
}

.site-nav {
  display: flex;
  gap: 26px;
  font-size: 14px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 6px;
}

.intro {
  border-bottom: 1px solid var(--line-strong);
  background:
    linear-gradient(90deg, transparent 0, transparent calc(50% - 1px), rgb(31 87 214 / 5%) 50%, transparent calc(50% + 1px)),
    var(--white);
}

.intro-grid {
  min-height: 470px;
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.75fr);
  align-items: end;
  gap: 64px;
  padding-block: 96px 62px;
}

.section-index,
.note-label,
.boundary-label,
.report-kicker,
.tool-name {
  margin: 0;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.status-line {
  margin: 24px 0 12px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

.status-line span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgb(8 122 91 / 12%);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 780px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(52px, 7vw, 94px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: 0;
}

.intro-lead {
  max-width: 760px;
  margin: 28px 0 0;
  color: #303640;
  font-size: 20px;
  line-height: 1.75;
}

.public-note {
  border-top: 4px solid var(--blue);
  border-bottom: 1px solid var(--line-strong);
  padding: 24px 0 28px;
}

.public-note h2 {
  margin: 12px 0 14px;
  font-size: 23px;
  line-height: 1.35;
}

.public-note p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

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

.fact-strip > div {
  min-height: 102px;
  padding: 22px 22px 22px 0;
}

.fact-strip > div + div {
  border-left: 1px solid var(--line);
  padding-left: 22px;
}

.fact-label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
}

.fact-strip strong {
  font-size: 16px;
}

.section {
  padding-block: 108px;
  border-bottom: 1px solid var(--line);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.8fr) minmax(0, 1.2fr);
  gap: 96px;
}

.section-heading h2,
.closing h2 {
  margin: 18px 0 0;
  font-family: var(--serif);
  font-size: 40px;
  line-height: 1.25;
  letter-spacing: 0;
}

.prose,
.section-summary {
  color: #343b45;
  font-size: 18px;
}

.prose p,
.section-summary {
  margin: 0;
}

.prose p + p {
  margin-top: 22px;
}

.prose code {
  padding: 2px 6px;
  border: 1px solid var(--line);
  background: var(--white);
}

.metrics {
  margin-top: 72px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.metric {
  padding: 30px 24px 30px 0;
}

.metric + .metric {
  border-left: 1px solid var(--line-strong);
  padding-left: 24px;
}

.metric strong {
  display: block;
  margin-bottom: 12px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 42px;
  line-height: 1;
}

.metric span {
  color: var(--muted);
  font-size: 13px;
}

.evidence-caption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
}

.section-ink {
  background: var(--ink);
  color: var(--white);
}

.section-ink .section-index,
.section-ink .trigger-label {
  color: #8db0ff;
}

.trigger-example {
  align-self: end;
  border-top: 1px solid #515862;
  border-bottom: 1px solid #515862;
  padding-block: 20px;
}

.trigger-label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 12px;
}

.trigger-example code {
  color: var(--white);
  font-size: 15px;
}

.steps {
  margin-top: 68px;
  padding-left: 0;
  list-style: none;
  border-top: 1px solid #515862;
}

.steps li {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 24px;
  padding-block: 30px;
  border-bottom: 1px solid #515862;
}

.steps li > span {
  color: #8db0ff;
  font-family: var(--mono);
  font-size: 13px;
}

.steps h3 {
  margin: 0 0 7px;
  font-size: 20px;
}

.steps p {
  max-width: 780px;
  margin: 0;
  color: #b9c0c9;
}

.tool-flow {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
}

.tool-flow article {
  position: relative;
  padding: 28px 34px 12px 0;
}

.tool-flow article + article {
  border-left: 1px solid var(--line);
  padding-left: 34px;
}

.tool-number {
  position: absolute;
  top: -11px;
  right: 18px;
  padding-inline: 8px;
  background: var(--paper);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.tool-flow h3 {
  margin: 34px 0 10px;
  font-size: 22px;
}

.tool-flow article > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.section-soft {
  background: var(--soft-blue);
}

.output-layout {
  margin-top: 70px;
  display: grid;
  grid-template-columns: minmax(250px, 0.65fr) minmax(0, 1.35fr);
  align-items: start;
  gap: 50px;
}

.run-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--white);
}

.figure-bar {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-inline: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.run-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1179 / 1700;
  object-fit: cover;
  object-position: top;
}

.run-figure figcaption {
  padding: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.report-sample {
  border-top: 5px solid var(--red);
  background: var(--white);
  box-shadow: 0 24px 55px rgb(20 23 27 / 10%);
}

.report-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 30px;
  border-bottom: 1px solid var(--line);
}

.report-header h3 {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-size: 27px;
  line-height: 1.35;
}

.report-kicker {
  color: var(--red);
}

.risk {
  flex: 0 0 auto;
  min-width: 50px;
  height: 30px;
  display: inline-grid;
  place-items: center;
  border: 1px solid currentColor;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

.risk-p0 {
  background: var(--soft-red);
  color: var(--red);
}

.finding-list {
  margin: 0;
  padding: 0 30px;
}

.finding-list > div {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 22px;
  padding-block: 18px;
  border-bottom: 1px solid var(--line);
}

.finding-list dt {
  color: var(--muted);
  font-size: 13px;
}

.finding-list dd {
  margin: 0;
  color: #2a3038;
}

.finding-list code {
  color: var(--blue);
  overflow-wrap: anywhere;
}

.report-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 30px;
  background: var(--ink);
  color: var(--white);
}

.report-footer span {
  color: #aab1bb;
  font-size: 12px;
}

.report-footer strong {
  font-size: 14px;
}

.boundary-grid {
  margin-top: 70px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.boundary {
  padding: 36px 42px 42px 0;
}

.boundary + .boundary {
  border-left: 1px solid var(--line-strong);
  padding-left: 42px;
}

.boundary-can .boundary-label {
  color: var(--green);
}

.boundary-stop .boundary-label {
  color: var(--red);
}

.boundary h3 {
  margin: 10px 0 22px;
  font-size: 24px;
}

.boundary ul {
  margin: 0;
  padding-left: 20px;
}

.boundary li {
  margin-block: 10px;
  color: #3c434d;
}

.boundary li::marker {
  color: var(--line-strong);
}

.closing {
  padding-block: 82px;
  background: var(--blue);
  color: var(--white);
}

.closing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: end;
  gap: 96px;
}

.closing .section-index {
  color: #c5d5ff;
}

.closing p:last-child {
  margin: 0;
  color: #e1e8ff;
}

.site-footer {
  background: #0a0d11;
  color: var(--white);
}

.footer-inner {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.footer-inner p {
  margin: 0;
  font-size: 13px;
}

.footer-inner p:last-child {
  color: #858e9a;
  text-align: right;
}

@media (max-width: 860px) {
  .site-header {
    position: static;
  }

  .header-inner {
    min-height: auto;
    padding-block: 15px;
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    gap: 20px;
    padding-bottom: 4px;
    white-space: nowrap;
  }

  .intro-grid,
  .content-grid,
  .output-layout,
  .closing-grid {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .intro-grid {
    min-height: 0;
    padding-block: 70px 50px;
  }

  h1 {
    font-size: 56px;
  }

  .fact-strip,
  .metrics {
    grid-template-columns: 1fr 1fr;
  }

  .fact-strip > div:nth-child(3),
  .fact-strip > div:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .fact-strip > div:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }

  .metric:nth-child(3),
  .metric:nth-child(4) {
    border-top: 1px solid var(--line-strong);
  }

  .metric:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }

  .section {
    padding-block: 84px;
  }

  .tool-flow {
    grid-template-columns: 1fr;
  }

  .tool-flow article {
    padding: 32px 0;
    border-bottom: 1px solid var(--line);
  }

  .tool-flow article + article {
    border-left: 0;
    padding-left: 0;
  }

  .tool-number {
    top: -10px;
  }

  .output-layout {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
    gap: 26px;
  }

  .boundary-grid {
    grid-template-columns: 1fr;
  }

  .boundary {
    padding: 34px 0;
  }

  .boundary + .boundary {
    border-top: 1px solid var(--line-strong);
    border-left: 0;
    padding-left: 0;
  }
}

@media (max-width: 620px) {
  .section-inner,
  .header-inner {
    width: min(calc(100% - 32px), var(--max));
  }

  .brand {
    font-size: 14px;
  }

  h1 {
    font-size: 43px;
  }

  .intro-lead {
    font-size: 17px;
  }

  .fact-strip,
  .metrics,
  .output-layout {
    grid-template-columns: 1fr;
  }

  .fact-strip > div,
  .fact-strip > div + div,
  .fact-strip > div:nth-child(3),
  .fact-strip > div:nth-child(4) {
    min-height: 0;
    padding: 18px 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .metrics {
    border-bottom: 0;
  }

  .metric,
  .metric + .metric,
  .metric:nth-child(3),
  .metric:nth-child(4) {
    padding: 24px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
    border-left: 0;
  }

  .section-heading h2,
  .closing h2 {
    font-size: 32px;
  }

  .steps li {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 12px;
  }

  .report-header {
    padding: 24px 20px;
  }

  .report-header h3 {
    font-size: 22px;
  }

  .finding-list {
    padding-inline: 20px;
  }

  .finding-list > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .report-footer {
    padding-inline: 20px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 24px;
  }

  .footer-inner p:last-child {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}