:root {
  --navy: #031d54;
  --navy-2: #092b68;
  --blue: #0b63e5;
  --orange: #ff6315;
  --ink: #14233d;
  --slate: #536985;
  --muted: #72839a;
  --line: #dfe8f3;
  --grid: rgba(8, 52, 114, .055);
  --pale: #edf4ff;
  --paper: #fbfdff;
  --white: #fff;
  --shadow: 0 24px 70px rgba(4, 31, 79, .09);
  --radius: 24px;
  --shell: 1180px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(11, 99, 229, .35);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  color: var(--white);
  background: var(--navy);
  border-radius: 8px;
}
.skip-link:focus { top: 16px; }

.shell {
  width: min(var(--shell), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 253, 255, .88);
  border-bottom: 1px solid rgba(3, 29, 84, .08);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--navy);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 2px solid var(--navy);
  border-radius: 10px;
}
.brand-mark span {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--blue);
  border-radius: 50%;
}
.brand-mark span:nth-child(1) { left: 7px; top: 8px; }
.brand-mark span:nth-child(2) { right: 7px; top: 8px; }
.brand-mark span:nth-child(3) { bottom: 7px; }
.brand-mark::before, .brand-mark::after {
  content: "";
  position: absolute;
  top: 13px;
  width: 13px;
  height: 2px;
  background: var(--blue);
}
.brand-mark::before { left: 9px; transform: rotate(55deg); }
.brand-mark::after { right: 9px; transform: rotate(-55deg); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #41536d;
  font-size: 14px;
  font-weight: 650;
}
.nav-links a { transition: color .2s ease; }
.nav-links a:hover { color: var(--blue); }

.hero {
  position: relative;
  overflow: hidden;
  padding: 104px 0 92px;
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: "";
  position: absolute;
  width: 620px;
  height: 620px;
  right: -250px;
  top: -300px;
  border: 1px solid rgba(11, 99, 229, .12);
  border-radius: 50%;
  box-shadow:
    0 0 0 70px rgba(11, 99, 229, .025),
    0 0 0 140px rgba(11, 99, 229, .02);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 82px;
  align-items: center;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.eyebrow span {
  width: 30px;
  height: 2px;
  background: var(--orange);
}

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
  color: var(--navy);
  line-height: 1.16;
  letter-spacing: -.045em;
}

h1 {
  margin-bottom: 30px;
  font-size: clamp(48px, 5.3vw, 76px);
  font-weight: 900;
}
h1 em {
  color: var(--blue);
  font-style: normal;
}

.hero-intro {
  max-width: 640px;
  margin-bottom: 36px;
  color: var(--slate);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.topic-quicklinks {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 22px;
  color: var(--slate);
  font-size: 13px;
  font-weight: 700;
}
.topic-quicklinks > span {
  color: var(--muted);
  font-weight: 650;
}
.topic-quicklinks a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 5px 11px;
  color: var(--navy);
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--line);
  border-radius: 9px;
  transition: color .2s ease, border-color .2s ease, transform .2s ease;
}
.topic-quicklinks a:hover {
  color: var(--blue);
  border-color: rgba(11, 99, 229, .35);
  transform: translateY(-1px);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border: 2px solid transparent;
  border-radius: 12px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary {
  color: var(--white);
  background: var(--navy);
  box-shadow: 0 12px 30px rgba(3, 29, 84, .18);
}
.button-primary:hover { background: var(--blue); }
.button-secondary {
  color: var(--navy);
  background: rgba(255, 255, 255, .72);
  border-color: var(--line);
}
.button-secondary:hover { border-color: rgba(11, 99, 229, .35); }

.metrics {
  display: flex;
  gap: 42px;
  margin: 50px 0 0;
}
.metrics div { display: grid; gap: 0; }
.metrics dt {
  color: var(--navy);
  font-size: 26px;
  font-weight: 900;
  line-height: 1.2;
}
.metrics dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.hero-visual {
  position: relative;
  min-height: 500px;
  isolation: isolate;
}
.orbit {
  position: absolute;
  left: 50%;
  top: 50%;
  border: 1px dashed rgba(11, 99, 229, .35);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.orbit-one { width: 420px; height: 420px; }
.orbit-two { width: 320px; height: 320px; border-style: solid; opacity: .55; }

.visual-card, .satellite {
  position: absolute;
  z-index: 2;
  background: rgba(255, 255, 255, .96);
  border: 2px solid var(--navy);
  box-shadow: var(--shadow);
}
.visual-main {
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 250px;
  height: 292px;
  padding-top: 38px;
  border-radius: 18px;
  transform: translate(-50%, -50%);
}
.visual-main strong {
  margin-top: -24px;
  color: var(--navy);
  font-size: 17px;
}
.browser-bar {
  position: absolute;
  left: -2px;
  right: -2px;
  top: -2px;
  display: flex;
  gap: 7px;
  align-items: center;
  height: 42px;
  padding-left: 16px;
  background: var(--navy);
  border-radius: 16px 16px 0 0;
}
.browser-bar i {
  width: 9px;
  height: 9px;
  background: var(--orange);
  border-radius: 50%;
}
.browser-bar i:nth-child(2) { background: #ffbd1a; }
.browser-bar i:nth-child(3) { background: #67bb38; }

.fingerprint {
  position: relative;
  width: 126px;
  height: 150px;
}
.fp {
  position: absolute;
  left: 50%;
  bottom: 8px;
  border: 4px solid var(--blue);
  border-bottom-color: transparent;
  border-radius: 50% 50% 46% 46%;
  transform: translateX(-50%);
}
.fp-1 { width: 118px; height: 142px; }
.fp-2 { width: 94px; height: 122px; }
.fp-3 { width: 70px; height: 100px; }
.fp-4 { width: 47px; height: 78px; }
.fp-5 { width: 24px; height: 56px; }

.satellite {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 140px;
  padding: 13px 16px;
  border-width: 1.5px;
  border-color: rgba(3, 29, 84, .55);
  border-radius: 12px;
  color: var(--navy);
  font-size: 13px;
  font-weight: 750;
}
.satellite b { color: var(--orange); font-size: 12px; }
.sat-one { left: 0; top: 72px; }
.sat-two { right: -10px; top: 108px; }
.sat-three { right: 24px; bottom: 55px; }
.node {
  position: absolute;
  z-index: 3;
  width: 12px;
  height: 12px;
  background: var(--orange);
  border: 3px solid var(--white);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--blue);
}
.node-one { left: 74px; top: 218px; }
.node-two { right: 70px; top: 250px; }
.node-three { left: 49%; bottom: 30px; }

.section { padding: 104px 0; }

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 48px;
}
.section-heading h2, .method h2, .closing h2 {
  margin-bottom: 0;
  font-size: clamp(36px, 4vw, 54px);
  font-weight: 900;
}
.section-heading > p {
  max-width: 470px;
  margin-bottom: 7px;
  color: var(--slate);
}

.projects {
  background: rgba(255, 255, 255, .78);
}
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 440px;
  padding: 30px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  border-radius: var(--radius);
  box-shadow: 0 15px 46px rgba(6, 36, 82, .07);
  transition: transform .25s ease, box-shadow .25s ease;
}
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(6, 36, 82, .12);
}
.project-card::after {
  content: "";
  position: absolute;
  right: -45px;
  top: -45px;
  width: 120px;
  height: 120px;
  background: var(--pale);
  border-radius: 50%;
}
.project-card.featured { border-top-color: var(--orange); }
.card-topline {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}
.card-topline b {
  padding: 5px 10px;
  color: var(--navy);
  background: var(--pale);
  border-radius: 99px;
  font-size: 12px;
}
.project-card h3 {
  position: relative;
  z-index: 1;
  margin-bottom: 18px;
  font-size: 27px;
  font-weight: 900;
}
.project-card h3 a:hover { color: var(--blue); }
.project-card p {
  color: var(--slate);
  font-size: 15px;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 10px 0 28px;
  padding: 0;
  list-style: none;
}
.tag-list li {
  padding: 5px 9px;
  color: #526682;
  background: #f3f7fc;
  border: 1px solid #e3ebf5;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 650;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: auto;
  color: var(--blue);
  font-size: 14px;
  font-weight: 850;
}
.text-link span { transition: transform .2s ease; }
.text-link:hover span { transform: translateX(5px); }

.method {
  position: relative;
  overflow: hidden;
  color: rgba(255, 255, 255, .82);
  background: var(--navy);
}
.method::after {
  content: "";
  position: absolute;
  right: -180px;
  bottom: -280px;
  width: 620px;
  height: 620px;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 50%;
  box-shadow: 0 0 0 70px rgba(255, 255, 255, .025);
}
.method-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 90px;
  align-items: center;
}
.eyebrow.light { color: #9cc3ff; }
.method h2 { color: var(--white); margin-bottom: 24px; }
.method-copy > p:not(.eyebrow) { margin-bottom: 32px; }
.button-light {
  color: var(--navy);
  background: var(--white);
}
.method-steps {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.method-steps li {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 20px;
  padding: 23px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.method-steps b {
  color: var(--orange);
  font-size: 15px;
  letter-spacing: .08em;
}
.method-steps h3 {
  margin-bottom: 7px;
  color: var(--white);
  font-size: 20px;
}
.method-steps p { margin: 0; color: #aebbd0; font-size: 14px; }

.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.scope-grid > a {
  display: block;
  min-height: 220px;
  padding: 30px;
  color: inherit;
  background: rgba(255, 255, 255, .62);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
}
.scope-grid > a:hover,
.scope-grid > a:focus-visible {
  position: relative;
  z-index: 1;
  background: var(--white);
  box-shadow: 0 14px 34px rgba(4, 30, 66, .10);
  transform: translateY(-3px);
}
.scope-grid span {
  color: var(--orange);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .1em;
}
.scope-grid h3 { margin: 22px 0 12px; font-size: 22px; }
.scope-grid p { margin: 0; color: var(--slate); font-size: 14px; }

.closing { padding: 30px 0 100px; }
.closing-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 44px 52px;
  background: var(--white);
  border: 2px solid var(--navy);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.closing h2 { margin-bottom: 12px; font-size: clamp(30px, 3vw, 42px); }
.closing p:not(.eyebrow) { max-width: 720px; margin-bottom: 0; color: var(--slate); }

.site-footer {
  color: #c0ccdc;
  background: #02163f;
  border-top: 4px solid var(--orange);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px 60px;
  align-items: center;
  padding: 52px 0;
}
.footer-inner strong { color: var(--white); font-size: 20px; }
.footer-inner p { margin: 4px 0 0; font-size: 14px; }
.footer-links { display: flex; gap: 22px; font-size: 14px; font-weight: 700; }
.footer-links a:hover { color: var(--white); }
.footer-inner small { grid-column: 1 / -1; color: #7f91aa; }

/* Topic article pages */
.article-hero {
  position: relative;
  padding: 64px 0 76px;
  overflow: hidden;
  background:
    radial-gradient(circle at 88% 15%, rgba(11, 99, 229, .09), transparent 27%),
    rgba(255, 255, 255, .66);
  border-bottom: 1px solid var(--line);
}
.article-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -260px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(11, 99, 229, .12);
  border-radius: 50%;
  box-shadow: 0 0 0 65px rgba(11, 99, 229, .025);
}
.article-hero .shell { position: relative; z-index: 1; }
.article-hero h1 {
  max-width: 1050px;
  margin-bottom: 26px;
  font-size: clamp(44px, 5vw, 70px);
}
.article-lead {
  max-width: 850px;
  margin-bottom: 24px;
  color: var(--slate);
  font-size: 19px;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.breadcrumb a:hover { color: var(--blue); }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}
.article-meta span:not(:last-child)::after {
  content: "·";
  margin-left: 20px;
  color: #a4b0c0;
}
.article-shell { padding-top: 54px; padding-bottom: 96px; }
.article-cover {
  margin: 0 0 62px;
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.article-cover img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 15px;
}
.article-cover figcaption {
  padding: 12px 8px 2px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 64px;
  align-items: start;
}
.article-content { min-width: 0; }
.article-content h2 {
  margin-bottom: 20px;
  font-size: clamp(30px, 3.2vw, 43px);
  font-weight: 900;
}
.article-content h3 { font-size: 20px; }
.article-content p { color: var(--slate); }
.article-aside {
  position: sticky;
  top: 104px;
  display: grid;
  gap: 5px;
  padding: 22px;
  background: rgba(255, 255, 255, .82);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 12px 36px rgba(6, 36, 82, .06);
}
.article-aside strong {
  margin-bottom: 9px;
  color: var(--navy);
  font-size: 14px;
}
.article-aside a {
  padding: 7px 0;
  color: var(--slate);
  border-bottom: 1px solid #edf2f8;
  font-size: 13px;
  font-weight: 650;
}
.article-aside a:hover { color: var(--blue); }
.answer-card {
  margin-bottom: 66px;
  padding: 34px 38px;
  background: var(--navy);
  border-left: 6px solid var(--orange);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.answer-card h2 { color: var(--white); }
.answer-card p { margin-bottom: 0; color: #c6d3e6; }
.answer-label, .section-kicker {
  margin-bottom: 12px !important;
  color: var(--orange) !important;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.content-section { margin-bottom: 76px; scroll-margin-top: 110px; }
.content-section > p:not(.section-kicker) { font-size: 17px; }
.content-note {
  margin-top: 18px !important;
  padding: 14px 17px;
  background: #f4f7fb;
  border-left: 3px solid var(--orange);
  border-radius: 6px;
  color: #62728a !important;
  font-size: 13px !important;
}
.table-wrap {
  width: 100%;
  overflow-x: auto;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 12px 34px rgba(6, 36, 82, .055);
}
.table-wrap table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.55;
}
.table-wrap th {
  padding: 15px 17px;
  color: var(--white);
  background: var(--navy);
  text-align: left;
  white-space: nowrap;
}
.table-wrap td {
  padding: 15px 17px;
  color: #445a76;
  border-bottom: 1px solid #e9eff6;
  vertical-align: top;
}
.table-wrap tr:last-child td { border-bottom: 0; }
.table-wrap tbody tr:nth-child(even) { background: #f8fafd; }
.fact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.fact-card {
  min-height: 210px;
  padding: 25px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: 16px;
}
.fact-card.accent { border-top-color: var(--orange); }
.fact-card > span {
  color: var(--orange);
  font-size: 12px;
  font-weight: 900;
}
.fact-card h3 { margin: 22px 0 10px; }
.fact-card p { margin: 0; font-size: 14px; }
.number-steps {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.number-steps li {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.number-steps b {
  color: var(--orange);
  font-size: 14px;
  letter-spacing: .08em;
}
.number-steps h3 { margin-bottom: 7px; }
.number-steps p { margin: 0; font-size: 14px; }
.boundary-card {
  margin-bottom: 76px;
  padding: 34px;
  background: #eef4fc;
  border: 1px solid #d3dfed;
  border-radius: 18px;
}
.boundary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.boundary-grid > div {
  padding: 22px;
  background: rgba(255, 255, 255, .72);
  border-radius: 12px;
}
.boundary-grid h3 { margin-bottom: 9px; }
.boundary-grid p { margin: 0; font-size: 14px; }
.layer-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.layer-list > div {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 22px;
  background: rgba(255, 255, 255, .72);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.layer-list b { color: var(--orange); font-size: 12px; }
.layer-list span { color: var(--slate); font-size: 14px; }
.layer-list strong { display: block; margin-bottom: 5px; color: var(--navy); font-size: 16px; }
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.platform-grid section {
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.platform-grid b { display: block; margin-bottom: 9px; color: var(--navy); font-size: 17px; }
.platform-grid p { margin: 0; font-size: 13px; }
.evidence-scale {
  display: grid;
  gap: 8px;
  margin-top: 24px;
}
.evidence-scale div {
  display: grid;
  grid-template-columns: 42px 1fr;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.evidence-scale b {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  color: var(--white);
  background: var(--navy);
  border-radius: 50%;
}
.evidence-scale span { color: var(--slate); font-size: 14px; }
.source-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 76px;
  padding: 38px;
  color: #c9d5e5;
  background: var(--navy);
  border-radius: 20px;
}
.source-cta h2 {
  max-width: 640px;
  color: var(--white);
  font-size: 31px;
}
.source-cta p:not(.section-kicker) { max-width: 680px; margin-bottom: 0; color: #aebbd0; font-size: 14px; }
.source-cta .button { flex: 0 0 auto; }
.related {
  padding: 80px 0 96px;
  background: rgba(255, 255, 255, .76);
  border-top: 1px solid var(--line);
}
.related h2 { margin-bottom: 32px; font-size: clamp(34px, 3.5vw, 48px); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.related-grid a {
  display: grid;
  gap: 9px;
  min-height: 140px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: 16px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.related-grid a:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.related-grid b { color: var(--navy); font-size: 20px; }
.related-grid span { color: var(--blue); font-size: 14px; font-weight: 700; }

@media (max-width: 980px) {
  .nav-links a:not(:last-child) { display: none; }
  .hero { padding-top: 76px; }
  .hero-grid { grid-template-columns: 1fr; gap: 60px; }
  .hero-visual { min-height: 460px; }
  .project-grid { grid-template-columns: 1fr; }
  .project-card { min-height: auto; }
  .method-grid { grid-template-columns: 1fr; gap: 55px; }
  .scope-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; gap: 0; }
  .article-aside { display: none; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 32px, var(--shell)); }
  .nav { min-height: 64px; }
  .hero { padding: 62px 0 70px; }
  h1 { font-size: 45px; }
  .hero-intro { font-size: 16px; }
  .topic-quicklinks {
    display: grid;
    grid-template-columns: 1fr;
    align-items: stretch;
  }
  .topic-quicklinks a {
    justify-content: space-between;
    min-height: 42px;
    padding: 8px 13px;
  }
  .topic-quicklinks a::after {
    content: "→";
    color: var(--blue);
  }
  .metrics { gap: 24px; }
  .metrics dt { font-size: 22px; }
  .hero-visual { min-height: 400px; transform: scale(.86); margin: -30px -30px; }
  .sat-one { left: -15px; }
  .sat-two { right: -25px; }
  .section { padding: 78px 0; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 18px; }
  .project-card { padding: 25px; }
  .scope-grid { grid-template-columns: 1fr; }
  .scope-grid > a { min-height: 180px; }
  .closing { padding-bottom: 74px; }
  .closing-inner { display: block; padding: 30px 25px; }
  .closing-inner .button { margin-top: 26px; width: 100%; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
  .article-hero { padding: 42px 0 56px; }
  .article-hero h1 { font-size: 40px; }
  .article-lead { font-size: 16px; }
  .article-meta span:not(:last-child)::after { display: none; }
  .article-meta { display: grid; gap: 5px; }
  .article-shell { padding-top: 30px; padding-bottom: 70px; }
  .article-cover { margin-bottom: 42px; padding: 7px; }
  .answer-card, .boundary-card, .source-cta { padding: 25px; }
  .answer-card { margin-bottom: 54px; }
  .content-section { margin-bottom: 58px; }
  .fact-grid, .layer-list, .platform-grid, .boundary-grid, .related-grid { grid-template-columns: 1fr; }
  .source-cta { display: block; }
  .source-cta .button { width: 100%; margin-top: 24px; }
  .related { padding: 65px 0 74px; }
}

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


/* Long-form article and trust system: generated 2026-07-25 */
.long-form-content > p,
.long-form-content > ul,
.long-form-content > ol,
.long-form-content > blockquote,
.long-form-content > .table-wrap,
.long-form-content > .body-figure {
  margin-bottom: 1.35rem;
}
.long-form-content > h2 {
  margin: 4rem 0 1.25rem;
  padding-top: .25rem;
  color: var(--navy);
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  line-height: 1.25;
}
.long-form-content > h3 {
  margin: 2.25rem 0 .8rem;
  color: var(--navy);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.35;
}
.long-form-content p,
.long-form-content li {
  color: #314d68;
  line-height: 1.86;
}
.long-form-content ul,
.long-form-content ol {
  padding-left: 1.45rem;
}
.long-form-content li + li {
  margin-top: .45rem;
}
.long-form-content blockquote {
  margin-left: 0;
  padding: 1.1rem 1.25rem;
  border-left: 4px solid var(--orange);
  border-radius: 0 14px 14px 0;
  background: #f6f9fc;
}
.long-form-content blockquote p:last-child {
  margin-bottom: 0;
}
.long-form-content code {
  padding: .12rem .35rem;
  border-radius: 5px;
  background: #edf2f7;
  color: #173e67;
  overflow-wrap: anywhere;
}
.long-form-content pre {
  overflow: auto;
  margin: 1.4rem 0;
  padding: 1.25rem;
  border-radius: 16px;
  background: #092a4d;
  color: #edf6ff;
}
.long-form-content pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}
.long-form-content .body-figure {
  margin: 2rem 0 2.5rem;
}
.long-form-content .body-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #dce6f0;
  border-radius: 20px;
  background: #fff;
}
.long-form-content hr {
  margin: 3rem 0;
  border: 0;
  border-top: 1px solid #dce6f0;
}
.long-form-content a {
  text-underline-offset: 3px;
}
.article-byline {
  margin: .8rem 0 0;
  color: #49657f;
  font-size: .95rem;
}
.article-byline a {
  color: inherit;
  text-underline-offset: 3px;
}
.claim-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
  margin: 1.25rem 0 0;
}
.claim-meta div {
  padding: .85rem 1rem;
  border: 1px solid #dbe6f0;
  border-radius: 12px;
  background: rgba(255,255,255,.72);
}
.claim-meta dt {
  color: #637a91;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
}
.claim-meta dd {
  margin: .35rem 0 0;
  color: #173e67;
  line-height: 1.55;
}
.answer-card .disclosure-note {
  margin: 1rem 0 0;
  padding: .9rem 1rem;
  border-left: 4px solid var(--orange);
  border-radius: 0 10px 10px 0;
  background: #fff8f2;
  color: #5a3a24;
  line-height: 1.65;
}
.editorial-note {
  margin: 4rem 0 2rem;
  padding: 1.5rem;
  border: 1px solid #dce6f0;
  border-radius: 18px;
  background: #f7fafc;
}
.editorial-note h2 {
  margin-top: .4rem !important;
}
.cluster-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.cluster-grid section {
  padding: 1.4rem;
  border: 1px solid #dce6f0;
  border-radius: 18px;
  background: #fff;
}
.cluster-grid h3 {
  margin: 0 0 .65rem;
  color: var(--navy);
}
.cluster-grid p {
  margin: 0;
  color: #49657f;
  line-height: 1.8;
}
.cluster-grid a {
  color: #0b4b8f;
  text-underline-offset: 3px;
}
.trust-hero h1 {
  max-width: 900px;
}
.trust-page {
  max-width: 980px;
  padding-top: 3.5rem;
  padding-bottom: 5rem;
}
.long-form-content .table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid #dce6f0;
  border-radius: 16px;
  background: #fff;
}
.long-form-content .table-wrap table {
  min-width: 760px;
  margin: 0;
  border: 0;
  border-radius: 0;
}
.long-form-content .table-wrap th,
.long-form-content .table-wrap td {
  vertical-align: top;
}
@media (max-width: 920px) {
  .long-form-content > h2 { margin-top: 3rem; }
  .article-aside { display: none; }
  .claim-meta,
  .cluster-grid { grid-template-columns: 1fr; }
}