:root {
  --navy: #003c64;
  --navy-deep: #002d4c;
  --blue: #0089e4;
  --blue-pale: #dceffc;
  --paper: #f5f5f3;
  --white: #fff;
  --ink-soft: #536b79;
  --line: rgba(0, 60, 100, .34);
  --line-soft: rgba(0, 60, 100, .15);
  --serif-jp: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --serif-en: "Cormorant Garamond", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--navy);
  font-family: var(--serif-jp);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.9;
}
body.menu-open { overflow: hidden; }
a { color: inherit; }
button { color: inherit; font: inherit; }
::selection { background: var(--blue); color: var(--white); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 82px;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  border-bottom: 1px solid var(--navy);
  background: rgba(245, 245, 243, .95);
  backdrop-filter: blur(14px);
  transition: height .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled { height: 68px; box-shadow: 0 9px 30px rgba(0, 45, 76, .06); }
.brand {
  width: 345px;
  display: flex;
  align-items: center;
  padding: 0 62px;
  border-right: 1px solid var(--navy);
}
.brand img { width: 222px; height: auto; display: block; }
.global-nav { display: flex; align-items: stretch; margin-left: auto; }
.global-nav a {
  min-width: 116px;
  padding: 0 22px;
  display: grid;
  place-items: center;
  border-left: 1px solid var(--line-soft);
  font-family: var(--serif-en);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .06em;
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
}
.global-nav a:hover, .global-nav a:focus-visible { background: var(--blue-pale); }
.global-nav .nav-contact { min-width: 146px; background: var(--navy); color: var(--white); }
.global-nav .nav-contact:hover, .global-nav .nav-contact:focus-visible { background: var(--blue); }
.global-nav i { color: var(--blue); font-style: normal; }
.global-nav .nav-contact i { color: inherit; }
.menu-button { display: none; }

.hero {
  min-height: calc(100vh - 82px);
  display: grid;
  grid-template-columns: minmax(540px, .92fr) minmax(540px, 1.08fr);
  border-bottom: 1px solid var(--navy);
}
.hero-copy {
  min-height: 660px;
  padding: clamp(70px, 8vw, 128px) clamp(44px, 6.2vw, 104px) 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.kicker {
  margin: 0 0 22px;
  font-family: var(--serif-en);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
  line-height: 1.3;
}
.hero h1 {
  margin: 0;
  font-size: clamp(39px, 4.1vw, 66px);
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: 1.44;
}
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lead {
  margin: 34px 0 10px;
  font-size: clamp(20px, 1.6vw, 27px);
  font-weight: 500;
  letter-spacing: -.025em;
}
.hero-body { max-width: 610px; margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 2; }
.hero-actions { margin-top: 36px; display: flex; align-items: center; gap: 34px; }
.button {
  min-height: 54px;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 46px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { background: var(--navy); color: var(--white); }
.button-primary:hover, .button-primary:focus-visible { background: var(--blue); }
.button span { font-family: var(--serif-en); font-size: 19px; }
.text-link {
  width: fit-content;
  padding: 5px 0 3px;
  border-bottom: 1px solid currentColor;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}
.text-link span { margin-left: 20px; color: var(--blue); font-family: var(--serif-en); font-size: 19px; }

.hero-visual {
  min-height: 660px;
  position: relative;
  overflow: hidden;
  border-left: 1px solid var(--navy);
  background:
    linear-gradient(180deg, rgba(0,45,76,.03), rgba(0,45,76,.22)),
    url("https://crossproducers.com/assets/images/index/img_visual.png") center / cover no-repeat,
    var(--navy);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 49.8%, rgba(255,255,255,.16) 50%, transparent 50.2%), linear-gradient(transparent 49.8%, rgba(255,255,255,.16) 50%, transparent 50.2%);
  background-size: 50% 50%;
  pointer-events: none;
}
.draft-badge {
  position: absolute;
  top: 26px;
  right: 28px;
  z-index: 2;
  padding: 8px 13px;
  background: rgba(245,245,243,.94);
  border: 1px solid var(--navy);
  font-family: var(--serif-en);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
}
.hero-sequence {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: rgba(0,45,76,.91);
  color: var(--white);
  backdrop-filter: blur(8px);
}
.hero-sequence div { min-height: 108px; padding: 22px 24px; border-top: 1px solid rgba(255,255,255,.7); border-right: 1px solid rgba(255,255,255,.35); }
.hero-sequence div:last-child { border-right: 0; }
.hero-sequence span { display: block; color: #6bc3ff; font-family: var(--serif-en); font-size: 13px; }
.hero-sequence strong { font-family: var(--serif-en); font-size: 22px; font-weight: 400; letter-spacing: .03em; }

.proof-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr)) 1.15fr;
  border-bottom: 1px solid var(--navy);
}
.proof-strip > div, .proof-strip > p { min-height: 120px; margin: 0; padding: 20px clamp(15px, 2vw, 30px); border-right: 1px solid var(--line); display: flex; flex-direction: column; justify-content: center; }
.proof-strip > div:last-of-type { border-right: 1px solid var(--navy); }
.proof-strip strong { font-family: var(--serif-en); font-size: clamp(34px, 3vw, 50px); font-weight: 400; line-height: 1; letter-spacing: -.035em; }
.proof-strip strong span { margin-left: 3px; font-family: var(--serif-jp); font-size: 13px; font-weight: 400; letter-spacing: 0; }
.proof-strip div > span { margin-top: 8px; color: var(--ink-soft); font-size: 12px; }
.proof-strip > p { border-right: 0; color: var(--ink-soft); font-size: 11px; line-height: 1.7; }

.section-shell { padding-right: clamp(28px, 7vw, 112px); padding-left: clamp(28px, 7vw, 112px); }
.section-index { display: flex; align-items: center; gap: 15px; align-self: start; }
.section-index span { font-family: var(--serif-en); font-size: 38px; font-weight: 300; line-height: 1; }
.section-index p { margin: 0; font-family: var(--serif-en); font-size: 13px; font-weight: 500; letter-spacing: .08em; }
.section-index::after { content: ""; width: 40px; height: 1px; background: currentColor; opacity: .65; }

.opening {
  padding-top: 120px;
  padding-bottom: 120px;
  display: grid;
  grid-template-columns: 190px minmax(460px, 1.2fr) minmax(280px, .65fr);
  gap: clamp(34px, 6vw, 92px);
  align-items: start;
  border-bottom: 1px solid var(--navy);
}
.opening-main h2, .model-heading h2, .graph-copy h2, .proof h2, .cases h2, .knowledge h2, .insights h2, .contact h2 {
  margin: 0;
  font-size: clamp(35px, 4vw, 60px);
  font-weight: 400;
  letter-spacing: -.05em;
  line-height: 1.48;
}
.opening-main > p:last-child { max-width: 720px; margin: 34px 0 0; color: var(--ink-soft); font-size: 15px; }
.opening-note { padding: 28px 0 0; border-top: 1px solid var(--navy); }
.opening-note span { font-family: var(--serif-en); font-size: 13px; font-weight: 500; letter-spacing: .08em; }
.opening-note strong { display: block; margin-top: 16px; color: var(--blue); font-size: clamp(25px, 2.2vw, 36px); font-weight: 500; line-height: 1.6; }
.opening-note p { margin: 17px 0 0; color: var(--ink-soft); font-size: 13px; }

.model { padding: 118px 0 0; border-bottom: 1px solid var(--navy); }
.model-intro { display: grid; grid-template-columns: 190px minmax(500px, 1.25fr) minmax(280px, .65fr); gap: clamp(34px, 6vw, 92px); align-items: end; }
.model-copy { margin: 0 0 7px; color: var(--ink-soft); font-size: 14px; }
.model-grid { margin-top: 72px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--navy); }
.model-card { position: relative; min-width: 0; border-right: 1px solid var(--navy); }
.model-card:last-child { border-right: 0; }
.model-card button { width: 100%; min-height: 492px; padding: 38px clamp(28px, 4.8vw, 76px) 42px; display: flex; flex-direction: column; align-items: flex-start; border: 0; background: transparent; text-align: left; cursor: pointer; transition: background .3s ease, color .3s ease; }
.model-card button:hover, .model-card button:focus-visible, .model-card button[aria-pressed="true"] { background: var(--white); outline: 0; }
.model-card.core button { background: var(--navy); color: var(--white); }
.model-card.core button:hover, .model-card.core button:focus-visible, .model-card.core button[aria-pressed="true"] { background: var(--navy-deep); }
.core-label { position: absolute; top: 0; right: 0; z-index: 2; padding: 7px 12px; background: var(--blue); color: var(--white); font-family: var(--serif-en); font-size: 11px; letter-spacing: .08em; }
.model-number { font-family: var(--serif-en); font-size: 16px; }
.model-card small { margin-top: 46px; font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .08em; }
.model-card h3 { margin: 7px 0 20px; font-family: var(--serif-en); font-size: clamp(48px, 5.5vw, 77px); font-weight: 300; letter-spacing: -.04em; line-height: .86; }
.model-card h3 sup { margin-left: 5px; font-size: 15px; vertical-align: top; }
.model-card p { max-width: 370px; margin: auto 0 0; color: var(--ink-soft); font-size: 14px; }
.model-card.core p { color: rgba(255,255,255,.76); }
.model-card i { margin-top: 24px; color: var(--blue); font-family: var(--serif-en); font-size: 12px; font-style: normal; font-weight: 500; letter-spacing: .06em; }
.model-card.core i { color: #6bc3ff; }
.stage-detail {
  min-height: 238px;
  padding: 42px clamp(28px, 7vw, 112px);
  display: grid;
  grid-template-columns: .9fr 1.1fr .8fr;
  gap: clamp(30px, 5vw, 80px);
  align-items: start;
  background: var(--white);
  border-top: 1px solid var(--navy);
}
.stage-detail span { font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .07em; }
.stage-detail h3 { margin: 14px 0 0; font-size: clamp(23px, 2.1vw, 34px); font-weight: 500; line-height: 1.6; }
.stage-detail > p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.stage-detail ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.stage-detail li { padding: 10px 0; border-bottom: 1px solid var(--line-soft); font-family: var(--serif-en); font-size: 14px; }

.graph-heart {
  padding-top: 130px;
  padding-bottom: 130px;
  display: grid;
  grid-template-columns: 190px minmax(400px, .9fr) minmax(520px, 1.1fr);
  gap: clamp(34px, 5vw, 82px);
  align-items: center;
  border-bottom: 1px solid var(--navy);
}
.graph-copy > p:not(.kicker) { max-width: 660px; margin: 34px 0 28px; color: var(--ink-soft); font-size: 14px; }
.graph-enablement { max-width: 660px; margin-top: 38px; padding: 18px 0; border-top: 1px solid var(--navy); border-bottom: 1px solid var(--line-soft); }
.graph-enablement span { color: var(--blue); font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .08em; }
.graph-enablement p { margin: 8px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.9; }
.graph-program-link { display: inline-block; margin-top: 13px; padding-bottom: 2px; border-bottom: 1px solid var(--navy); font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .05em; text-decoration: none; }
.graph-program-link b { margin-left: 8px; color: var(--blue); font-size: 14px; font-weight: 400; }
.decision-loop { aspect-ratio: 1.05 / 1; position: relative; min-height: 520px; }
.decision-loop::before, .decision-loop::after { content: ""; position: absolute; inset: 12%; border: 1px solid var(--line); border-radius: 50%; }
.decision-loop::after { inset: 25%; border-color: var(--blue); }
.loop-center { position: absolute; inset: 35%; z-index: 2; display: grid; place-content: center; text-align: center; background: var(--navy); color: var(--white); border-radius: 50%; box-shadow: 0 0 0 16px var(--paper); }
.loop-center small { color: #6bc3ff; font-family: var(--serif-en); font-size: 10px; letter-spacing: .08em; line-height: 1.3; }
.loop-center strong { margin-top: 4px; font-family: var(--serif-en); font-size: clamp(23px, 2.5vw, 38px); font-weight: 300; line-height: .8; }
.loop-item { width: 168px; min-height: 96px; position: absolute; z-index: 3; padding: 13px 16px; background: var(--paper); border: 1px solid var(--navy); }
.loop-item span { color: var(--blue); font-family: var(--serif-en); font-size: 12px; }
.loop-item strong { display: block; font-family: var(--serif-en); font-size: 18px; font-weight: 500; line-height: 1.1; }
.loop-item small { color: var(--ink-soft); font-size: 11px; }
.item-a { top: 2%; left: 50%; transform: translateX(-50%); }
.item-b { top: 50%; right: 0; transform: translateY(-50%); }
.item-c { bottom: 2%; left: 50%; transform: translateX(-50%); }
.item-d { top: 50%; left: 0; transform: translateY(-50%); }

.proof { padding: 116px 0 0; border-bottom: 1px solid var(--navy); }
.proof-head { display: grid; grid-template-columns: 190px minmax(460px, 1.2fr) minmax(280px, .65fr); gap: clamp(34px, 6vw, 92px); align-items: end; }
.proof-head > p { margin: 0 0 8px; color: var(--ink-soft); font-size: 14px; }
.depth-grid { margin-top: 72px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--navy); }
.depth-grid article { min-height: 284px; padding: 31px clamp(23px, 3vw, 48px); border-right: 1px solid var(--navy); }
.depth-grid article:last-child { border-right: 0; }
.depth-grid article:nth-child(1) { background: rgba(255,255,255,.25); }
.depth-grid article:nth-child(2) { background: rgba(220,239,252,.34); }
.depth-grid article:nth-child(3) { background: rgba(0,137,228,.12); }
.depth-grid .principal-depth { background: var(--navy); color: var(--white); }
.depth-grid span { font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .08em; }
.depth-grid h3 { margin: 55px 0 8px; font-size: clamp(27px, 2.4vw, 38px); font-weight: 500; }
.depth-grid p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.depth-grid .principal-depth p { color: rgba(255,255,255,.72); }
.depth-grid .principal-depth strong { display: block; margin-top: 28px; color: #6bc3ff; font-family: var(--serif-en); font-size: 11px; letter-spacing: .08em; }

.cases { padding-top: 120px; padding-bottom: 130px; }
.cases > .section-index { margin-bottom: 42px; }
.cases-heading { max-width: 1000px; }
.case-feature { margin-top: 66px; padding: clamp(32px, 5vw, 70px); display: block; background: var(--navy); color: var(--white); text-decoration: none; transition: background .25s ease, transform .25s ease; }
.case-feature:hover, .case-feature:focus-visible { background: var(--navy-deep); transform: translateY(-3px); }
.case-top, .case-card > div { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.case-top span, .case-card > div span { font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .08em; }
.case-top i, .case-card > div i { color: #6bc3ff; font-family: var(--serif-en); font-size: 28px; font-style: normal; font-weight: 300; }
.case-feature h3 { margin: 58px 0 22px; font-size: clamp(34px, 4vw, 60px); font-weight: 400; letter-spacing: -.045em; line-height: 1.45; }
.case-feature > p { max-width: 830px; margin: 0; color: rgba(255,255,255,.74); font-size: 14px; }
.case-route { margin-top: 38px; display: flex; align-items: center; gap: 15px; flex-wrap: wrap; }
.case-route span { padding: 8px 13px; border: 1px solid rgba(255,255,255,.45); font-family: var(--serif-en); font-size: 12px; letter-spacing: .05em; }
.case-route b { color: #6bc3ff; font-weight: 400; }
.case-link { display: block; width: fit-content; margin: 48px 0 0 auto; border-bottom: 1px solid #6bc3ff; color: #6bc3ff; font-family: var(--serif-en); font-size: 13px; letter-spacing: .05em; }
.ma-service-link { min-height: 92px; padding: 20px clamp(24px, 4vw, 58px); display: grid; grid-template-columns: 1fr 1.3fr auto; align-items: center; gap: 30px; border-right: 1px solid var(--navy); border-bottom: 1px solid var(--navy); border-left: 1px solid var(--navy); background: var(--blue-pale); text-decoration: none; transition: background .2s ease, color .2s ease; }
.ma-service-link:hover, .ma-service-link:focus-visible { background: var(--blue); color: var(--white); }
.ma-service-link span { font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .06em; }
.ma-service-link strong { font-size: 17px; font-weight: 500; }
.ma-service-link i { color: var(--blue); font-family: var(--serif-en); font-size: 25px; font-style: normal; }
.ma-service-link:hover i, .ma-service-link:focus-visible i { color: var(--white); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-right: 1px solid var(--navy); border-left: 1px solid var(--navy); }
.case-card { min-height: 370px; padding: 30px clamp(24px, 3vw, 46px); display: flex; flex-direction: column; border-right: 1px solid var(--navy); border-bottom: 1px solid var(--navy); color: var(--navy); text-decoration: none; transition: background .25s ease; }
.case-card:last-child { border-right: 0; }
.case-card:hover, .case-card:focus-visible { background: var(--white); }
.case-card > div i { color: var(--blue); }
.case-card h3 { margin: 58px 0 20px; font-size: clamp(21px, 2vw, 30px); font-weight: 500; letter-spacing: -.03em; line-height: 1.65; }
.case-card p { margin: auto 0 0; color: var(--ink-soft); font-size: 12px; }
.case-card > strong { margin-top: 25px; font-family: var(--serif-en); font-size: 12px; letter-spacing: .06em; }
.case-all { margin: 34px 0 0 auto; display: block; width: fit-content; padding-bottom: 4px; border-bottom: 1px solid var(--navy); font-family: var(--serif-en); font-size: 14px; font-weight: 500; letter-spacing: .05em; text-decoration: none; }
.case-all span { margin-left: 28px; color: var(--blue); }

.knowledge { background: var(--navy); color: var(--white); }
.knowledge-layout { padding-top: 118px; padding-bottom: 118px; display: grid; grid-template-columns: 190px minmax(460px, 1.05fr) minmax(360px, .75fr); gap: clamp(34px, 6vw, 92px); align-items: start; }
.section-index.inverse { color: var(--white); }
.knowledge .kicker { color: #6bc3ff; }
.knowledge-copy > p:last-child { max-width: 700px; margin: 34px 0 0; color: rgba(255,255,255,.7); font-size: 14px; }
.knowledge-stats { border-top: 1px solid rgba(255,255,255,.7); }
.knowledge-stats > div { padding: 20px 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid rgba(255,255,255,.28); }
.knowledge-stats strong { font-family: var(--serif-en); font-size: clamp(35px, 3.4vw, 53px); font-weight: 300; line-height: 1; }
.knowledge-stats strong span { color: #6bc3ff; font-size: .5em; }
.knowledge-stats p { margin: 0; color: rgba(255,255,255,.62); font-family: var(--serif-en); font-size: 10px; letter-spacing: .08em; line-height: 1.4; text-align: right; }
.knowledge-links { grid-column: 2 / 4; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid rgba(255,255,255,.5); }
.knowledge-links a { padding: 22px 0; display: flex; justify-content: space-between; border-bottom: 1px solid rgba(255,255,255,.5); font-family: var(--serif-en); font-size: 14px; letter-spacing: .06em; text-decoration: none; }
.knowledge-links a:first-child { padding-right: 40px; border-right: 1px solid rgba(255,255,255,.5); }
.knowledge-links a:last-child { padding-left: 40px; }
.knowledge-links span { color: #6bc3ff; }

.insights { padding-top: 120px; padding-bottom: 130px; }
.insights > .section-index { margin-bottom: 42px; }
.insights-heading { display: grid; grid-template-columns: 1.15fr .65fr; gap: 90px; align-items: end; }
.insights-heading > p { margin: 0 0 10px; color: var(--ink-soft); font-size: 14px; }
.insight-grid { margin-top: 67px; display: grid; grid-template-columns: 1.05fr .95fr; border: 1px solid var(--navy); }
.observatory-card { min-height: 525px; padding: clamp(35px, 5vw, 72px); display: flex; flex-direction: column; justify-content: center; background: var(--white); text-decoration: none; transition: background .25s ease; }
.observatory-card:hover, .observatory-card:focus-visible { background: var(--blue-pale); }
.observatory-card > span { font-family: var(--serif-en); font-size: 12px; font-weight: 500; letter-spacing: .08em; }
.observatory-card h3 { margin: 35px 0 20px; font-size: clamp(37px, 4.2vw, 62px); font-weight: 400; letter-spacing: -.05em; }
.observatory-card h3 b { margin-right: 13px; font-family: var(--serif-en); font-size: 1.4em; font-weight: 300; }
.observatory-card p { max-width: 590px; margin: 0; color: var(--ink-soft); font-size: 14px; }
.observatory-card strong { width: fit-content; margin-top: 54px; padding-bottom: 4px; border-bottom: 1px solid var(--blue); color: var(--blue); font-size: 13px; }
.note-stack { border-left: 1px solid var(--navy); }
.note-stack > a { min-height: 141px; padding: 25px 31px; display: grid; grid-template-columns: 1fr auto; align-content: center; column-gap: 25px; border-bottom: 1px solid var(--navy); text-decoration: none; transition: background .2s ease; }
.note-stack > a:hover, .note-stack > a:focus-visible { background: var(--white); }
.note-stack span { grid-column: 1; font-family: var(--serif-en); font-size: 11px; font-weight: 500; letter-spacing: .07em; }
.note-stack h3 { grid-column: 1; margin: 7px 0 0; font-size: clamp(16px, 1.3vw, 21px); font-weight: 500; line-height: 1.7; }
.note-stack i { grid-column: 2; grid-row: 1 / 3; align-self: center; color: var(--blue); font-family: var(--serif-en); font-size: 21px; font-style: normal; }
.note-stack .note-index { min-height: 101px; display: flex; align-items: center; justify-content: space-between; border-bottom: 0; background: var(--navy); color: var(--white); font-family: var(--serif-en); font-size: 13px; letter-spacing: .06em; }
.note-stack .note-index:hover, .note-stack .note-index:focus-visible { background: var(--blue); }

.contact { min-height: 620px; position: relative; overflow: hidden; display: grid; place-items: center; background: var(--blue); color: var(--white); text-align: center; }
.contact-mark { position: absolute; left: 50%; bottom: -13%; transform: translateX(-50%); color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,.25); font-family: var(--serif-en); font-size: clamp(180px, 34vw, 520px); font-weight: 300; line-height: .7; white-space: nowrap; }
.contact-inner { position: relative; z-index: 2; max-width: 920px; padding: 90px 26px; }
.contact-inner > p:not(.kicker) { max-width: 660px; margin: 28px auto 35px; color: rgba(255,255,255,.82); font-size: 14px; }
.button-light { margin: 0 auto; background: var(--white); color: var(--navy); }
.button-light:hover, .button-light:focus-visible { background: var(--navy); color: var(--white); }

.site-footer { min-height: 150px; padding: 38px clamp(28px, 7vw, 112px); display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 50px; background: var(--paper); border-top: 1px solid var(--navy); }
.site-footer img { width: 202px; }
.site-footer > p { margin: 0; color: var(--ink-soft); font-family: var(--serif-en); font-size: 14px; letter-spacing: .05em; }
.site-footer > div { display: flex; flex-direction: column; align-items: flex-end; gap: 9px; }
.site-footer a, .site-footer span { font-family: var(--serif-en); font-size: 11px; letter-spacing: .05em; }
.site-footer a { font-weight: 500; text-decoration: none; }
.site-footer span { color: var(--ink-soft); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,1,.36,1); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1180px) {
  .brand { width: 285px; padding: 0 36px; }
  .global-nav a { min-width: auto; padding: 0 16px; }
  .hero { grid-template-columns: 1fr 1fr; }
  .opening, .model-intro, .proof-head, .knowledge-layout { grid-template-columns: 140px 1fr; }
  .opening-note, .model-copy, .proof-head > p { grid-column: 2; }
  .graph-heart { grid-template-columns: 140px 1fr; }
  .decision-loop { grid-column: 2; width: min(620px, 100%); justify-self: center; }
  .knowledge-stats { grid-column: 2; }
  .knowledge-links { grid-column: 2; }
  .proof-strip { grid-template-columns: repeat(5, 1fr); }
  .proof-strip > p { display: none; }
  .proof-strip > div:last-of-type { border-right: 0; }
}

@media (max-width: 860px) {
  .site-header { height: 70px; }
  .brand { width: auto; padding: 0 22px; border-right: 0; }
  .brand img { width: 190px; }
  .menu-button { width: 70px; display: grid; place-content: center; gap: 7px; border: 0; border-left: 1px solid var(--navy); background: transparent; }
  .menu-button span { width: 24px; height: 1px; display: block; background: var(--navy); transition: transform .2s ease; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .global-nav { position: fixed; inset: 70px 0 auto; display: none; flex-direction: column; align-items: stretch; background: var(--paper); border-bottom: 1px solid var(--navy); }
  .global-nav.is-open { display: flex; }
  .global-nav a { min-height: 58px; display: flex; justify-content: space-between; border-top: 1px solid var(--line-soft); border-left: 0; }
  .hero { min-height: auto; grid-template-columns: 1fr; }
  .hero-copy { min-height: 610px; padding: 70px 28px 58px; }
  .hero h1 { font-size: clamp(36px, 9vw, 54px); }
  .hero-visual { min-height: 500px; border-top: 1px solid var(--navy); border-left: 0; }
  .proof-strip { grid-template-columns: repeat(2, 1fr); }
  .proof-strip > div { min-height: 106px; border-bottom: 1px solid var(--line-soft); }
  .proof-strip > div:nth-child(even) { border-right: 0; }
  .proof-strip > div:last-of-type { grid-column: 1 / 3; }
  .opening, .model-intro, .proof-head, .graph-heart, .knowledge-layout { grid-template-columns: 1fr; gap: 38px; }
  .section-index { margin-bottom: 18px; }
  .opening-note, .model-copy, .proof-head > p, .decision-loop, .knowledge-stats, .knowledge-links { grid-column: 1; }
  .opening { padding-top: 85px; padding-bottom: 85px; }
  .model { padding-top: 85px; }
  .model-grid { grid-template-columns: 1fr; }
  .model-card { border-right: 0; border-bottom: 1px solid var(--navy); }
  .model-card button { min-height: 390px; }
  .stage-detail { grid-template-columns: 1fr; gap: 28px; }
  .graph-heart { padding-top: 85px; padding-bottom: 85px; }
  .decision-loop { width: 100%; min-height: 460px; }
  .proof { padding-top: 85px; }
  .depth-grid { grid-template-columns: repeat(2, 1fr); }
  .depth-grid article:nth-child(2) { border-right: 0; }
  .depth-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--navy); }
  .cases { padding-top: 85px; padding-bottom: 90px; }
  .case-grid { grid-template-columns: 1fr; }
  .ma-service-link { grid-template-columns: 1fr auto; }
  .ma-service-link span { grid-column: 1 / 3; }
  .case-card { border-right: 0; }
  .knowledge-layout { padding-top: 85px; padding-bottom: 85px; }
  .knowledge-links { grid-template-columns: 1fr; }
  .knowledge-links a:first-child { padding-right: 0; border-right: 0; }
  .knowledge-links a:last-child { padding-left: 0; }
  .insights { padding-top: 85px; padding-bottom: 90px; }
  .insights-heading { grid-template-columns: 1fr; gap: 28px; }
  .insight-grid { grid-template-columns: 1fr; }
  .note-stack { border-top: 1px solid var(--navy); border-left: 0; }
  .site-footer { grid-template-columns: 1fr; gap: 15px; }
  .site-footer > div { align-items: flex-start; }
}

@media (max-width: 560px) {
  body { font-size: 15px; }
  .hero-copy { min-height: 570px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .hero-visual { min-height: 430px; }
  .hero-sequence div { min-height: 82px; padding: 15px 12px; }
  .hero-sequence strong { font-size: 15px; }
  .draft-badge { top: 18px; right: 16px; }
  .section-shell { padding-right: 22px; padding-left: 22px; }
  .opening-main h2, .model-heading h2, .graph-copy h2, .proof h2, .cases h2, .knowledge h2, .insights h2, .contact h2 { font-size: 34px; }
  .model-card button { min-height: 360px; padding: 30px 24px; }
  .model-card small { margin-top: 34px; }
  .stage-detail { padding: 32px 22px; }
  .decision-loop { min-height: 390px; }
  .loop-item { width: 134px; min-height: 80px; padding: 9px 10px; }
  .loop-item strong { font-size: 14px; }
  .loop-item small { font-size: 9px; }
  .loop-center { inset: 36%; box-shadow: 0 0 0 9px var(--paper); }
  .loop-center strong { font-size: 21px; }
  .depth-grid { grid-template-columns: 1fr; }
  .depth-grid article { min-height: 210px; border-right: 0; border-bottom: 1px solid var(--navy); }
  .depth-grid article:nth-child(3) { border-bottom: 1px solid var(--navy); }
  .depth-grid h3 { margin-top: 30px; }
  .case-feature { padding: 30px 24px; }
  .case-feature h3 { margin-top: 42px; font-size: 33px; }
  .case-route { gap: 8px; }
  .case-route span { padding: 6px 8px; font-size: 10px; }
  .case-card { min-height: 330px; padding: 27px 24px; }
  .ma-service-link { padding: 20px 24px; gap: 8px 18px; }
  .ma-service-link strong { font-size: 15px; }
  .observatory-card { min-height: 450px; padding: 34px 24px; }
  .note-stack > a { padding: 22px 24px; }
  .contact { min-height: 540px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}