:root {
  --field-950: oklch(20.7% 0.047 237);
  --field-900: oklch(24.5% 0.052 238);
  --field-800: oklch(30.2% 0.055 238);
  --blue-500: oklch(56.8% 0.255 265);
  --blue-400: oklch(64.5% 0.196 260);
  --blue-200: oklch(83.5% 0.083 258);
  --mist-50: oklch(98.2% 0.003 240);
  --mist-100: oklch(95.5% 0.008 240);
  --mist-200: oklch(90.5% 0.012 240);
  --mist-300: oklch(83.5% 0.018 240);
  --ink-950: oklch(18% 0.036 238);
  --ink-900: oklch(23% 0.035 238);
  --ink-700: oklch(40% 0.035 238);
  --ink-600: oklch(48% 0.03 238);
  --white: oklch(100% 0 0);
  --text-on-dark: oklch(96% 0.008 245);
  --text-muted-dark: oklch(78% 0.025 242);
  --line-dark: oklch(68% 0.06 253 / 0.24);
  --line-light: oklch(76% 0.025 240 / 0.58);
  --content: 1240px;
  --gutter: clamp(1.25rem, 6vw, 5rem);
  --radius-sm: 4px;
  --radius-md: 10px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--field-950); }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text-on-dark);
  background: var(--field-950);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { display: block; max-width: 100%; }
h1, h2, h3, p, figure, blockquote { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
::selection { color: var(--white); background: var(--blue-500); }
:focus-visible { outline: 2px solid var(--blue-400); outline-offset: 4px; }

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  color: var(--white);
  background: var(--blue-500);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }
.shell { width: min(calc(100% - (var(--gutter) * 2)), var(--content)); margin-inline: auto; }
.light-section { position: relative; z-index: 2; color: var(--ink-900); background: var(--mist-50); }
.dark-panel { position: relative; z-index: 2; background: var(--field-950); }
.field-section { position: relative; isolation: isolate; overflow: hidden; background: var(--field-950); }
.field-canvas { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; opacity: 0.95; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  padding-inline: max(1.25rem, calc((100vw - var(--content)) / 2));
  border-bottom: 1px solid var(--line-dark);
  background: oklch(20.7% 0.047 237 / 0.82);
  backdrop-filter: blur(18px);
  transition: background 180ms ease;
}
.site-header.is-scrolled { background: oklch(18% 0.045 238 / 0.94); }
.brand { justify-self: start; }
.brand img { width: 132px; height: auto; }
.desktop-nav { display: flex; align-items: center; gap: clamp(1.25rem, 3vw, 2.5rem); color: var(--text-muted-dark); font-size: 0.875rem; }
.desktop-nav a { position: relative; padding-block: 1.65rem; transition: color 180ms ease; }
.desktop-nav a::after { position: absolute; right: 0; bottom: 0; left: 0; height: 1px; content: ""; background: var(--blue-400); transform: scaleX(0); transform-origin: left; transition: transform 220ms var(--ease-out); }
.desktop-nav a:hover { color: var(--white); }
.desktop-nav a:hover::after { transform: scaleX(1); }
.header-action { justify-self: end; min-height: 44px; display: inline-flex; align-items: center; gap: 0.5rem; padding-inline: 1rem; border: 1px solid oklch(68% 0.18 260 / 0.7); border-radius: var(--radius-sm); background: oklch(52% 0.24 265 / 0.22); font-size: 0.875rem; font-weight: 650; }
.header-action:hover { background: oklch(52% 0.24 265 / 0.38); }
.menu-button, .mobile-menu { display: none; }

.hero { min-height: 100svh; padding: clamp(8rem, 13vh, 10rem) 0 5.5rem; }
.hero::after { position: absolute; inset: auto 0 0; height: 38%; z-index: -1; content: ""; background: linear-gradient(to top, var(--field-950), transparent); }
.hero-inner { min-height: calc(100svh - 13rem); display: flex; flex-direction: column; justify-content: space-between; gap: 5rem; }
.hero-copy { max-width: 950px; }
.hero-context, .field-readout, .section-label, .module-index span, .module-index b, .module-audience, .day-agenda article > span, .leader-grid span, .final-cta-inner > p {
  font-family: Arial, sans-serif;
  letter-spacing: 0.04em;
}
.hero-context { margin-bottom: 1.75rem; color: var(--blue-200); font-size: 0.78rem; font-weight: 700; }
.hero h1 { margin-bottom: 1.7rem; max-width: 14ch; font-size: clamp(3.2rem, 7.1vw, 5.9rem); font-weight: 630; line-height: 1.03; letter-spacing: -0.035em; }
.hero h1 span { color: var(--blue-400); }
.hero-lead { max-width: 45rem; color: var(--text-muted-dark); font-size: clamp(1.05rem, 1.55vw, 1.3rem); line-height: 1.82; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; margin-top: 2.5rem; }
.primary-action, .text-action { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 0.75rem; font-size: 0.92rem; font-weight: 650; }
.primary-action { padding-inline: 1.35rem; border-radius: var(--radius-sm); color: var(--white); background: var(--blue-500); transition: background 180ms ease, transform 180ms var(--ease-out); }
.primary-action:hover { background: var(--blue-400); transform: translateY(-2px); }
.text-action { color: var(--text-muted-dark); }
.text-action:hover { color: var(--white); }
.hero-path { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-dark); }
.hero-path div { position: relative; min-height: 100px; padding: 1.25rem 1.25rem 0; border-right: 1px solid var(--line-dark); }
.hero-path div:last-child { border-right: 0; }
.hero-path div::before { position: absolute; top: -4px; left: 0; width: 7px; height: 7px; content: ""; border-radius: 50%; background: var(--blue-400); }
.hero-path b, .hero-path span { display: block; }
.hero-path b { margin-bottom: 0.4rem; font-size: 1rem; }
.hero-path span { color: var(--text-muted-dark); font-size: 0.8rem; }
.field-readout { position: absolute; right: var(--gutter); bottom: 1.1rem; left: var(--gutter); display: flex; justify-content: space-between; color: oklch(76% 0.06 245 / 0.58); font-size: 0.66rem; }
.hero-orbit { position: absolute; top: 17%; right: 6%; z-index: -1; width: min(40vw, 580px); aspect-ratio: 1; opacity: 0.55; }
.hero-orbit strong { position: absolute; inset: 50% auto auto 50%; color: var(--blue-400); font: 400 clamp(4rem, 8vw, 7rem)/1 Arial; transform: translate(-50%, -50%); }
.orbit { position: absolute; inset: 0; border: 1px solid oklch(66% 0.11 250 / 0.28); border-radius: 50%; }
.orbit-a { transform: rotate(20deg) scaleY(0.42); }
.orbit-b { transform: rotate(-42deg) scaleY(0.55); }

.problem { padding: clamp(5rem, 10vw, 8.5rem) 0; border-top: 1px solid var(--line-dark); }
.problem-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr); gap: clamp(3rem, 7vw, 8rem); }
.section-label { margin-bottom: 1.5rem; color: var(--blue-200); font-size: 0.76rem; font-weight: 700; }
.section-label--blue { color: var(--blue-500); }
.problem h2, .split-heading h2, .faculty-heading h2, .fit h2 { font-size: clamp(2.25rem, 4.4vw, 4.6rem); line-height: 1.12; letter-spacing: -0.035em; }
.shift-list { border-top: 1px solid var(--line-dark); }
.shift-list article { display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; padding: 1.35rem 0; border-bottom: 1px solid var(--line-dark); }
.shift-list article > span { color: var(--blue-400); font: 700 0.75rem Arial; }
.shift-list h3 { margin-bottom: 0.35rem; font-size: 1.15rem; }
.shift-list p { margin-bottom: 0; color: var(--text-muted-dark); line-height: 1.7; }

.method { padding: clamp(5.5rem, 10vw, 9rem) 0; }
.book-layout { display: grid; grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr); align-items: center; gap: clamp(4rem, 10vw, 10rem); }
.book-visual { position: relative; width: min(100%, 400px); margin-inline: auto; }
.book-visual img { position: relative; z-index: 2; width: 76%; margin-inline: auto; border: 1px solid var(--mist-200); box-shadow: 18px 24px 0 oklch(82% 0.034 252); }
.book-visual figcaption { margin-top: 2.6rem; color: var(--ink-600); font: 700 0.7rem Arial; letter-spacing: 0.07em; text-align: center; }
.book-field { position: absolute; top: -2.5rem; right: -1rem; z-index: 1; color: oklch(89% 0.05 255); font: 400 13rem/1 Arial; }
.book-copy h2 { margin-bottom: 0.8rem; font-size: clamp(2.7rem, 5.4vw, 5.2rem); line-height: 1.04; letter-spacing: -0.04em; }
.book-meta { margin-bottom: 2rem; color: var(--blue-500); font-size: 0.92rem; font-weight: 650; }
.book-intro { max-width: 42rem; color: var(--ink-700); font-size: 1.05rem; line-height: 1.9; }
.book-copy blockquote { max-width: 34rem; margin: 2.5rem 0; padding: 1.4rem 0; border-top: 1px solid var(--ink-900); border-bottom: 1px solid var(--ink-900); font-size: clamp(1.35rem, 2.3vw, 2rem); font-weight: 600; line-height: 1.55; }
.inline-link { display: inline-flex; gap: 0.5rem; align-items: center; color: var(--blue-500); font-weight: 650; }
.operating-model { margin-top: clamp(6rem, 11vw, 10rem); border-top: 1px solid var(--ink-900); }
.model-intro { display: flex; justify-content: space-between; padding: 1.15rem 0; border-bottom: 1px solid var(--line-light); }
.model-intro p, .model-intro span { margin: 0; font-size: 0.82rem; }
.model-intro span { color: var(--ink-600); }
.operating-model ol { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; list-style: none; }
.operating-model li { position: relative; min-height: 245px; padding: 2rem clamp(1.2rem, 3vw, 2.5rem); border-right: 1px solid var(--line-light); }
.operating-model li:last-child { border-right: 0; }
.operating-model li:not(:last-child)::after { position: absolute; top: 50%; right: -0.65rem; z-index: 2; width: 1.3rem; height: 1.3rem; display: grid; place-items: center; content: "→"; color: var(--blue-500); background: var(--mist-50); transform: translateY(-50%); }
.operating-model li > span { color: var(--blue-500); font: 700 0.72rem Arial; }
.operating-model h3 { margin: 4.2rem 0 0.75rem; font-size: 1.35rem; }
.operating-model li p { margin: 0; color: var(--ink-600); line-height: 1.7; }

.system-intro { padding: clamp(5rem, 9vw, 8rem) 0 4rem; border-top: 1px solid var(--mist-200); }
.split-heading { display: grid; grid-template-columns: minmax(180px, 0.38fr) minmax(0, 1fr); gap: clamp(2rem, 7vw, 7rem); }
.split-heading h2 { margin-bottom: 1.2rem; }
.split-heading > div > p { max-width: 46rem; color: var(--ink-600); font-size: 1.05rem; line-height: 1.8; }
.transformation-rail { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 4.5rem; border-top: 1px solid var(--ink-900); border-bottom: 1px solid var(--ink-900); }
.transformation-rail a { position: relative; min-height: 180px; padding: 1.2rem 1.3rem 1.6rem; border-right: 1px solid var(--line-light); transition: color 180ms ease, background 180ms ease; }
.transformation-rail a:last-child { border-right: 0; }
.transformation-rail a:hover { color: var(--white); background: var(--blue-500); }
.transformation-rail b, .transformation-rail span, .transformation-rail small { display: block; }
.transformation-rail b { color: var(--blue-500); font: 700 0.76rem Arial; }
.transformation-rail a:hover b { color: var(--white); }
.transformation-rail span { margin-top: 3.5rem; font-size: 1.1rem; font-weight: 650; }
.transformation-rail small { margin-top: 0.5rem; color: var(--ink-600); }
.transformation-rail a:hover small { color: oklch(93% 0.025 258); }

.module { padding: clamp(5rem, 9vw, 8rem) 0; border-top: 1px solid var(--mist-200); }
.module-layout { display: grid; grid-template-columns: minmax(180px, 0.34fr) minmax(0, 1fr); gap: clamp(2.5rem, 7vw, 7rem); }
.module-index { align-self: start; padding-top: 0.4rem; }
.module-index span, .module-index b { display: block; }
.module-index span { color: var(--blue-500); font-size: 0.7rem; font-weight: 700; }
.module-index b { margin-top: 1rem; font-size: 1.9rem; }
.module-content > h2 { max-width: 15ch; margin-bottom: 1rem; font-size: clamp(2.4rem, 4.7vw, 4.8rem); line-height: 1.08; letter-spacing: -0.04em; }
.module-audience { margin-bottom: 1.2rem; color: var(--blue-500); font-size: 0.74rem; font-weight: 700; }
.module-promise { max-width: 50rem; margin-bottom: 3.3rem; color: var(--ink-600); font-size: clamp(1.1rem, 2vw, 1.45rem); line-height: 1.7; }
.module-columns { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(240px, 0.7fr); gap: 3rem; border-top: 1px solid var(--ink-900); padding-top: 2rem; }
.module-columns h3 { margin-bottom: 1.5rem; font-size: 1rem; }
.plain-list { margin: 0; padding: 0; list-style: none; }
.plain-list li { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 1rem 0; border-top: 1px solid var(--line-light); }
.plain-list li:first-child { border-top: 0; }
.plain-list span { color: var(--ink-600); line-height: 1.7; }
.deliverable-panel { align-self: end; padding: 2rem; color: var(--white); background: var(--field-950); }
.deliverable-panel p { margin-bottom: 0; color: var(--text-muted-dark); line-height: 2; }

.module--dark { color: var(--text-on-dark); background: var(--field-950); border-color: var(--line-dark); }
.module--dark .module-promise, .module--dark .module-index span { color: var(--text-muted-dark); }
.module--dark .module-audience { color: var(--blue-200); }
.dimension-path { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); }
.dimension-path div { position: relative; min-height: 125px; padding: 1.1rem; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.dimension-path div::after { position: absolute; right: -5px; bottom: -5px; z-index: 2; width: 9px; height: 9px; content: ""; background: var(--blue-400); }
.dimension-path b, .dimension-path span { display: block; }
.dimension-path b { color: var(--blue-400); font: 700 0.72rem Arial; }
.dimension-path span { margin-top: 2rem; font-size: 0.95rem; font-weight: 600; }
.day-agenda { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 3rem; border-top: 1px solid var(--line-dark); }
.day-agenda article { min-height: 220px; padding: 1.6rem 1.5rem; border-right: 1px solid var(--line-dark); }
.day-agenda article:last-child { border-right: 0; }
.day-agenda article > span { color: var(--blue-200); font-size: 0.7rem; font-weight: 700; }
.day-agenda h3 { margin: 4rem 0 0.75rem; font-size: 1.25rem; }
.day-agenda p { margin: 0; color: var(--text-muted-dark); line-height: 1.75; }
.module-note { margin: 2rem 0 0; color: var(--blue-200); font-weight: 650; }

.leader-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink-900); border-bottom: 1px solid var(--ink-900); }
.leader-grid > div { min-height: 265px; padding: 1.8rem 2rem 2rem 0; }
.leader-grid > div + div { padding-left: 2rem; border-left: 1px solid var(--line-light); }
.leader-grid span { color: var(--blue-500); font-size: 0.72rem; font-weight: 700; }
.leader-grid h3 { margin: 4.5rem 0 1rem; font-size: 1.4rem; }
.leader-grid p { margin: 0; color: var(--ink-600); line-height: 1.8; }
.artifact-line { display: flex; flex-wrap: wrap; gap: 0.65rem; align-items: center; margin-top: 2rem; }
.artifact-line b { margin-right: 0.5rem; }
.artifact-line span { padding: 0.65rem 0.85rem; border: 1px solid var(--line-light); border-radius: var(--radius-sm); color: var(--ink-700); font-size: 0.82rem; }

.module--field { color: var(--text-on-dark); background: var(--field-900); border-color: var(--line-dark); }
.module--field .module-audience { color: var(--blue-200); }
.module--field .module-promise, .module--field .module-index span { color: var(--text-muted-dark); }
.cadence-line { display: flex; flex-wrap: wrap; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.cadence-line span { flex: 1 1 12rem; padding: 1.4rem 1rem; border-right: 1px solid var(--line-dark); text-align: center; }
.cadence-line span:last-child { border-right: 0; }

.delivery { padding: clamp(6rem, 10vw, 10rem) 0; }
.timeline { margin-top: 5rem; border-top: 1px solid var(--ink-900); }
.timeline article { display: grid; grid-template-columns: minmax(180px, 0.33fr) 1fr; gap: 2rem; padding: 2.4rem 0; border-bottom: 1px solid var(--line-light); }
.timeline-range b, .timeline-range span { display: block; font-family: Arial, sans-serif; }
.timeline-range b { color: var(--blue-500); font-size: clamp(2rem, 4.5vw, 4rem); letter-spacing: -0.04em; }
.timeline-range span { margin-top: 0.4rem; color: var(--ink-600); font-size: 0.65rem; letter-spacing: 0.08em; }
.timeline article h3 { margin-bottom: 0.7rem; font-size: 1.4rem; }
.timeline article p { margin-bottom: 1.2rem; color: var(--ink-600); line-height: 1.8; }
.timeline article strong { color: var(--blue-500); }
.outcome-band { margin-top: 6rem; padding: clamp(2.5rem, 5vw, 5rem); color: var(--white); background: var(--blue-500); }
.outcome-band p { margin-bottom: 2rem; color: oklch(93% 0.025 258); }
.outcome-band h3 { max-width: 30ch; margin: 0; font-size: clamp(1.65rem, 3.5vw, 3.2rem); line-height: 1.45; }

.faculty { padding: clamp(6rem, 10vw, 10rem) 0; }
.faculty-heading { display: grid; grid-template-columns: 0.35fr 1fr; column-gap: 5rem; align-items: start; }
.faculty-heading .section-label { grid-row: 1 / 3; }
.faculty-heading h2 { margin-bottom: 1rem; }
.faculty-heading > p:last-child { max-width: 45rem; color: var(--text-muted-dark); line-height: 1.8; }
.faculty-list { margin-top: 5rem; border-top: 1px solid var(--line-dark); }
.faculty-profile { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: clamp(3rem, 7vw, 7rem); align-items: center; padding: 4rem 0; border-bottom: 1px solid var(--line-dark); }
.faculty-profile--reverse figure { order: 2; }
.faculty-profile figure { position: relative; width: 300px; margin: 0; overflow: hidden; background: var(--field-800); }
.faculty-profile--reverse { grid-template-columns: minmax(0, 1fr) 300px; }
.faculty-profile figure::after { position: absolute; inset: 0; content: ""; border-top: 4px solid var(--blue-500); pointer-events: none; }
.faculty-profile img { width: 100%; aspect-ratio: 1 / 1.04; object-fit: cover; object-position: center top; filter: saturate(0.82); }
.faculty-copy > p:first-child { color: var(--blue-200); font-size: 0.82rem; }
.faculty-copy h3 { margin-bottom: 0.65rem; font-size: clamp(2.7rem, 5vw, 5.2rem); line-height: 1; letter-spacing: -0.04em; }
.faculty-role { margin-bottom: 2rem; color: var(--text-muted-dark); font-size: 1.05rem; }
.faculty-copy ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-dark); }
.faculty-copy li { position: relative; padding: 0.9rem 0 0.9rem 1.4rem; border-bottom: 1px solid var(--line-dark); color: var(--text-muted-dark); line-height: 1.7; }
.faculty-copy li::before { position: absolute; top: 1.5rem; left: 0; width: 5px; height: 5px; content: ""; background: var(--blue-400); }

.fit { padding: clamp(6rem, 10vw, 10rem) 0; }
.fit-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, 0.8fr); gap: clamp(4rem, 8vw, 9rem); }
.fit ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink-900); }
.fit li { padding: 1.2rem 0; border-bottom: 1px solid var(--line-light); font-size: 1.05rem; }
.fit li::before { margin-right: 0.9rem; color: var(--blue-500); content: "∇"; }

.final-cta { min-height: 78svh; display: grid; place-items: center; padding: 7rem 0; }
.final-cta::after { position: absolute; inset: 0; z-index: -1; content: ""; background: radial-gradient(circle at 75% 45%, transparent, var(--field-950) 66%); }
.final-cta-inner > p { color: var(--blue-200); font-size: 0.72rem; font-weight: 700; }
.final-cta h2 { max-width: 20ch; margin: 1.5rem 0 3rem; font-size: clamp(2.5rem, 5.6vw, 5.4rem); line-height: 1.16; letter-spacing: -0.04em; }
.site-footer { padding: 4rem 0; border-top: 1px solid var(--line-dark); color: var(--text-muted-dark); background: var(--field-950); }
.site-footer img { width: 120px; }
.site-footer p { margin: 1.5rem 0 3rem; }
.site-footer .shell > div { display: flex; justify-content: space-between; gap: 1rem; font-size: 0.8rem; }

.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .desktop-nav, .header-action { display: none; }
  .menu-button { justify-self: end; display: inline-flex; align-items: center; gap: 0.7rem; min-height: 44px; padding: 0; border: 0; background: transparent; }
  .menu-button i, .menu-button i::after { display: block; width: 20px; height: 1px; background: currentColor; transition: transform 180ms ease; }
  .menu-button i { position: relative; }
  .menu-button i::after { position: absolute; top: 6px; content: ""; }
  .menu-button[aria-expanded="true"] i { transform: rotate(45deg); }
  .menu-button[aria-expanded="true"] i::after { top: 0; transform: rotate(-90deg); }
  .mobile-menu { position: fixed; inset: 72px 0 0; display: flex; flex-direction: column; padding: 2rem var(--gutter); background: var(--field-950); }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu a { padding: 1.2rem 0; border-bottom: 1px solid var(--line-dark); font-size: 1.1rem; }
  .problem-grid, .book-layout, .module-layout, .fit-layout { grid-template-columns: 1fr; }
  .problem-grid, .book-layout { gap: 4rem; }
  .module-index { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 1rem; border-bottom: 1px solid var(--line-light); }
  .module--dark .module-index, .module--field .module-index { border-color: var(--line-dark); }
  .module-index b { margin-top: 0; font-size: 1.2rem; }
  .faculty-heading { grid-template-columns: 1fr; }
  .faculty-heading .section-label { grid-row: auto; }
  .faculty-profile { grid-template-columns: 240px minmax(0, 1fr); gap: 3rem; }
  .faculty-profile--reverse { grid-template-columns: 240px minmax(0, 1fr); }
  .faculty-profile--reverse figure { order: 0; }
  .faculty-profile figure { width: 240px; }
}

@media (max-width: 680px) {
  :root { --gutter: 1.25rem; }
  .site-header { min-height: 64px; }
  .brand img { width: 112px; }
  .mobile-menu { inset-block-start: 64px; }
  .hero { padding-top: 7rem; }
  .hero-inner { min-height: calc(100svh - 11rem); gap: 3rem; }
  .hero h1 { font-size: clamp(3rem, 14vw, 4.4rem); }
  .hero-orbit { top: 15%; right: -35%; width: 90vw; opacity: 0.35; }
  .hero-path { grid-template-columns: 1fr 1fr; }
  .hero-path div { min-height: 84px; border-bottom: 1px solid var(--line-dark); }
  .hero-path div:nth-child(2) { border-right: 0; }
  .field-readout { display: none; }
  .problem h2, .split-heading h2, .faculty-heading h2, .fit h2 { font-size: clamp(2.25rem, 11vw, 3.4rem); }
  .split-heading { grid-template-columns: 1fr; gap: 1rem; }
  .book-layout { gap: 5rem; }
  .book-visual { width: 84%; }
  .book-copy h2 { font-size: 3rem; }
  .model-intro { display: block; }
  .model-intro span { display: block; margin-top: 0.4rem; }
  .operating-model ol { grid-template-columns: 1fr; }
  .operating-model li { min-height: auto; padding: 1.5rem 0; border-right: 0; border-bottom: 1px solid var(--line-light); }
  .operating-model li:not(:last-child)::after { display: none; }
  .operating-model h3 { margin-top: 2rem; }
  .transformation-rail { grid-template-columns: 1fr 1fr; }
  .transformation-rail a { min-height: 145px; border-bottom: 1px solid var(--line-light); }
  .transformation-rail a:nth-child(2) { border-right: 0; }
  .module-content > h2 { font-size: clamp(2.3rem, 11vw, 3.5rem); }
  .module-columns, .leader-grid { grid-template-columns: 1fr; }
  .plain-list li { grid-template-columns: 1fr; gap: 0.4rem; }
  .dimension-path { grid-template-columns: 1fr 1fr; }
  .dimension-path div { min-height: 110px; }
  .day-agenda { grid-template-columns: 1fr; }
  .day-agenda article { min-height: auto; padding: 1.5rem 0; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .day-agenda h3 { margin-top: 2rem; }
  .leader-grid > div { min-height: auto; padding: 1.5rem 0; }
  .leader-grid > div + div { padding-left: 0; border-top: 1px solid var(--line-light); border-left: 0; }
  .leader-grid h3 { margin-top: 2rem; }
  .timeline article { grid-template-columns: 1fr; gap: 1.2rem; }
  .timeline-range { display: flex; align-items: baseline; gap: 0.7rem; }
  .timeline-range b { font-size: 2.5rem; }
  .faculty-profile { grid-template-columns: 1fr; gap: 2.5rem; }
  .faculty-profile--reverse { grid-template-columns: 1fr; }
  .faculty-profile figure { width: min(68vw, 240px); }
  .faculty-copy h3 { font-size: 3.5rem; }
  .fit-layout { gap: 2.5rem; }
  .final-cta { min-height: 68svh; }
  .site-footer .shell > div { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
  .field-canvas { opacity: 0.55; }
}