@charset "utf-8";

:root {
  --navy-950: #252322;
  --navy-900: #2c2928;
  --navy-850: #343130;
  --navy-800: #3e3a39;
  --navy-700: #5b5654;
  --blue-600: #009fe8;
  --blue-500: #008fd1;
  --blue-300: #87d0f4;
  --cyan-400: #87d0f4;
  --signal: #009fe8;
  --paper: #f5f8f9;
  --paper-blue: #edf5f8;
  --white: #ffffff;
  --ink: #3e3a39;
  --ink-soft: #5b5654;
  --muted: #747372;
  --line: #dbe4e8;
  --line-dark: rgba(135, 208, 244, .22);
  --shell: min(1260px, calc(100vw - 72px));
  --header-height: 82px;
  --display: "PingFang SC", "Noto Sans SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --body: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --utility: "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body, button, input { font-family: var(--body); }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; }
::selection { color: var(--white); background: var(--blue-600); }
.shell { width: var(--shell); margin: 0 auto; }
.skip-link {
  position: fixed;
  z-index: 500;
  top: 8px;
  left: 8px;
  padding: 9px 13px;
  color: var(--navy-950);
  background: var(--cyan-400);
  transform: translateY(-150%);
}
.skip-link:focus { transform: none; }

/* Header */
.site-header {
  position: absolute;
  z-index: 80;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  color: var(--ink);
  border-bottom: 1px solid rgba(62, 58, 57, .11);
  background: rgba(255, 255, 255, .96);
  transition: background .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.site-header.is-scrolled {
  position: fixed;
  border-color: rgba(62, 58, 57, .12);
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 16px 38px rgba(62, 58, 57, .10);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}
.header-inner {
  display: grid;
  grid-template-columns: 196px 1fr auto;
  align-items: center;
  gap: clamp(26px, 3vw, 52px);
  height: 100%;
}
.brand {
  display: inline-flex;
  align-items: center;
  width: 186px;
}
.brand-logo { display: block; width: 100%; height: auto; }
.brand-color {
  position: relative;
  display: block;
  aspect-ratio: 1582 / 444;
  overflow: hidden;
}
.brand-color .brand-logo {
  position: absolute;
  top: 0;
  left: 0;
  width: 151.71%;
  max-width: none;
  transform: translate(-17.04%, -37.67%);
}
.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(18px, 2vw, 31px);
  height: 100%;
  font-size: 13px;
  white-space: nowrap;
}
.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 100%;
  color: #686563;
  transition: color .2s ease;
}
.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--cyan-400);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .22s ease;
}
.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-current { color: var(--ink); }
.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-current::after {
  transform: scaleX(1);
  transform-origin: left;
}
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 10px 16px;
  border: 1px solid var(--blue-600);
  color: var(--white);
  background: var(--blue-600);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}
.header-cta:hover,
.header-cta:focus-visible {
  color: var(--white);
  border-color: var(--blue-500);
  background: var(--blue-500);
}
.nav-toggle { display: none; }
.nav-close-label { display: none; }

/* Shared typography */
.v4-section { padding: clamp(96px, 10vw, 146px) 0; }
.v4-section-index,
.v4-kicker {
  margin: 0;
  font-family: var(--utility);
  font-size: 10px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .16em;
}
.v4-section-index { color: var(--blue-600); }
.v4-section-heading h2,
.v4-founder-copy h2,
.v4-coverage-intro h2,
.v4-faq-intro h2,
.v4-contact h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(40px, 4vw, 58px);
  font-weight: 760;
  line-height: 1.16;
  letter-spacing: -.055em;
  text-wrap: balance;
}
.v4-heading-split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .55fr);
  align-items: end;
  gap: clamp(50px, 8vw, 116px);
}
.v4-heading-split .v4-section-index { margin-bottom: 19px; }
.v4-heading-split > p,
.v4-heading-split > a {
  max-width: 420px;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}

/* Hero */
.v4-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-height) + 70px) 0 0;
  color: var(--ink);
  background:
    linear-gradient(115deg, rgba(135, 208, 244, .15), transparent 42%),
    linear-gradient(135deg, #ffffff 0%, #f4f9fb 62%, #eaf6fb 100%);
}
.v4-hero::after {
  position: absolute;
  right: -8%;
  bottom: 7%;
  width: 48%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 159, 232, .35), transparent);
  content: "";
  transform: rotate(-12deg);
}
.v4-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(460px, .98fr);
  align-items: center;
  gap: clamp(48px, 6vw, 92px);
  min-height: 610px;
  padding-bottom: 64px;
}
.v4-hero-copy { padding: 18px 0; }
.v4-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 13px;
  color: #8a8785;
}
.v4-kicker span { color: var(--cyan-400); }
.v4-hero h1 {
  max-width: 720px;
  margin: 26px 0 0;
  font-family: var(--display);
  font-size: clamp(52px, 5.2vw, 76px);
  font-weight: 760;
  line-height: 1.11;
  letter-spacing: -.068em;
  text-wrap: balance;
}
.v4-hero h1 span {
  display: block;
  color: var(--blue-600);
}
.v4-hero-lede {
  max-width: 615px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}
.v4-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 35px;
}
.v4-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 13px 21px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 700;
  transition: transform .2s ease, color .2s ease, background .2s ease, border-color .2s ease;
}
.v4-button:hover,
.v4-button:focus-visible { transform: translateY(-3px); }
.v4-button-primary {
  color: var(--white);
  background: var(--blue-600);
  box-shadow: 0 12px 30px rgba(0, 159, 232, .20);
}
.v4-button-primary:hover,
.v4-button-primary:focus-visible { background: var(--blue-500); }
.v4-button-quiet {
  color: var(--ink);
  border-color: rgba(62, 58, 57, .22);
  background: rgba(255, 255, 255, .48);
}
.v4-button-quiet:hover,
.v4-button-quiet:focus-visible {
  border-color: var(--blue-600);
  background: rgba(135, 208, 244, .13);
}
.v4-hero-principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 630px;
  margin: 45px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.v4-hero-principles div {
  padding: 15px 16px 15px 0;
}
.v4-hero-principles div + div {
  padding-left: 16px;
  border-left: 1px solid var(--line);
}
.v4-hero-principles dt {
  color: var(--blue-600);
  font-family: var(--utility);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .16em;
}
.v4-hero-principles dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
}
.v4-proof-wall {
  padding: 14px;
  border: 1px solid rgba(135, 208, 244, .34);
  background: rgba(44, 41, 40, .98);
  box-shadow: 28px 34px 70px rgba(62, 58, 57, .18);
}
.v4-proof-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 2px 1px 12px;
  font-family: var(--utility);
  font-size: 8px;
  letter-spacing: .12em;
}
.v4-proof-heading span { color: var(--cyan-400); font-weight: 700; }
.v4-proof-heading b { color: #758ba6; font-weight: 500; letter-spacing: .04em; }
.v4-proof-wall a {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--navy-900);
}
.v4-proof-wall img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform .5s cubic-bezier(.2,.7,.2,1), filter .3s ease;
}
.v4-proof-wall a:hover img,
.v4-proof-wall a:focus-visible img {
  filter: saturate(1.06) contrast(1.02);
  transform: scale(1.025);
}
.v4-proof-wall a > span {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 11px 13px;
  color: var(--white);
  background: rgba(37, 35, 34, .84);
  -webkit-backdrop-filter: blur(9px);
  backdrop-filter: blur(9px);
}
.v4-proof-wall a > span b {
  font-family: var(--utility);
  font-size: 9px;
  letter-spacing: .1em;
}
.v4-proof-wall a > span small {
  color: #aebed1;
  font-size: 9px;
}
.v4-proof-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 8px;
}
.v4-proof-pair a > span { padding: 9px 10px; }
.v4-proof-pair a > span small { display: none; }
.v4-discovery-route {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 230px 1fr;
  align-items: stretch;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  color: var(--white);
  background: var(--navy-900);
}
.v4-discovery-route > p {
  display: grid;
  align-content: center;
  gap: 4px;
  margin: 0;
  padding: 22px 26px 22px 0;
}
.v4-discovery-route > p b { font-size: 13px; }
.v4-discovery-route > p span { color: #7186a1; font-size: 10px; }
.v4-discovery-route ol {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
}
.v4-discovery-route li {
  display: grid;
  grid-template-columns: auto 1fr;
  align-content: center;
  gap: 2px 12px;
  min-height: 90px;
  padding: 16px 21px;
  border-left: 1px solid var(--line-dark);
}
.v4-discovery-route li > span {
  grid-row: 1 / span 2;
  color: var(--cyan-400);
  font-family: var(--utility);
  font-size: 9px;
  font-weight: 700;
}
.v4-discovery-route strong { color: #eff4fc; font-size: 13px; }
.v4-discovery-route small { color: #7589a3; font-size: 9px; }

/* Diagnosis */
.v4-diagnosis { background: var(--white); }
.v4-diagnosis-list {
  margin-top: 72px;
  border-top: 1px solid var(--line);
}
.v4-diagnosis-list a {
  display: grid;
  grid-template-columns: 70px minmax(250px, .95fr) minmax(300px, 1.15fr) 210px;
  align-items: center;
  gap: 28px;
  min-height: 116px;
  padding: 18px 22px 18px 4px;
  border-bottom: 1px solid var(--line);
  transition: color .2s ease, background .2s ease, padding .2s ease;
}
.v4-diagnosis-list a:hover,
.v4-diagnosis-list a:focus-visible {
  padding-right: 14px;
  padding-left: 14px;
  color: var(--navy-950);
  background: #eef8fc;
}
.v4-diagnosis-list a > span {
  color: var(--blue-600);
  font-family: var(--utility);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
}
.v4-diagnosis-list h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 20px;
  line-height: 1.45;
  letter-spacing: -.03em;
}
.v4-diagnosis-list p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}
.v4-diagnosis-list a > b {
  justify-self: end;
  color: var(--blue-600);
  font-size: 11px;
}

/* Connected system */
.v4-system {
  color: #eef4fc;
  background: var(--navy-900);
}
.v4-system .v4-section-index { color: var(--cyan-400); }
.v4-system-heading {
  display: grid;
  grid-template-columns: 1.4fr .6fr;
  gap: 20px 90px;
  align-items: end;
}
.v4-system-heading .v4-section-index { grid-column: 1 / -1; }
.v4-system-heading h2 { font-size: clamp(42px, 4.4vw, 62px); }
.v4-system-heading h2 span { color: var(--blue-300); }
.v4-system-heading > p:last-child {
  max-width: 400px;
  margin: 0 0 7px;
  color: #93a7bf;
  font-size: 14px;
  line-height: 1.9;
}
.v4-system-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 70px;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.v4-system-step {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 472px;
  padding: 30px 27px 27px;
  border-left: 1px solid var(--line-dark);
  transition: background .25s ease, transform .25s ease;
}
.v4-system-step:last-child { border-right: 1px solid var(--line-dark); }
.v4-system-step::before {
  position: absolute;
  top: -1px;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--blue-500);
  content: "";
  transform: scaleX(.18);
  transform-origin: left;
  transition: transform .28s ease, background .28s ease;
}
.v4-system-step:nth-child(3)::before { background: var(--cyan-400); }
.v4-system-step:nth-child(4)::before { background: var(--signal); }
.v4-system-step:hover,
.v4-system-step:focus-visible {
  background: rgba(255, 255, 255, .045);
  transform: translateY(-7px);
}
.v4-system-step:hover::before,
.v4-system-step:focus-visible::before { transform: scaleX(1); }
.v4-step-code {
  color: #71869f;
  font-family: var(--utility);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .13em;
}
.v4-system-step h3 {
  margin: 43px 0 18px;
  font-family: var(--display);
  font-size: 27px;
  line-height: 1.25;
  letter-spacing: -.045em;
}
.v4-system-step > p {
  min-height: 94px;
  margin: 0;
  color: #9fb0c4;
  font-size: 13px;
  line-height: 1.8;
}
.v4-system-step dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 9px 12px;
  margin: 24px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-dark);
}
.v4-system-step dt {
  color: var(--cyan-400);
  font-size: 10px;
  font-weight: 700;
}
.v4-system-step dd {
  margin: 0;
  color: #c1cedd;
  font-size: 11px;
}
.v4-system-step > b {
  margin-top: auto;
  padding-top: 30px;
  color: var(--white);
  font-size: 11px;
}

/* Founder */
.v4-founder { background: var(--paper-blue); }
.v4-founder-layout {
  display: grid;
  grid-template-columns: minmax(300px, .7fr) minmax(0, 1.3fr);
  gap: clamp(55px, 9vw, 128px);
  align-items: center;
}
.v4-founder-portrait {
  max-width: 430px;
  background: var(--navy-900);
  box-shadow: 24px 24px 0 #dce5f0;
}
.v4-founder-portrait img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}
.v4-founder-portrait p {
  display: grid;
  gap: 3px;
  margin: 0;
  padding: 19px 22px;
  color: var(--white);
}
.v4-founder-portrait p span {
  color: var(--cyan-400);
  font-family: var(--utility);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .14em;
}
.v4-founder-portrait p b { font-size: 14px; }
.v4-founder-copy { max-width: 700px; }
.v4-founder-copy .v4-section-index { margin-bottom: 20px; }
.v4-founder-copy h2 { font-size: clamp(45px, 5vw, 68px); }
.v4-founder-lede {
  max-width: 660px;
  margin: 27px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.95;
}
.v4-founder-copy blockquote {
  margin: 30px 0 0;
  padding: 20px 0 20px 23px;
  border-left: 3px solid var(--blue-600);
  color: var(--navy-800);
  font-family: var(--display);
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 650;
  line-height: 1.55;
  letter-spacing: -.035em;
}
.v4-founder-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 34px;
  border-top: 1px solid #cbd6e2;
  border-bottom: 1px solid #cbd6e2;
}
.v4-founder-facts span {
  display: grid;
  gap: 5px;
  padding: 17px 18px 17px 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}
.v4-founder-facts span + span {
  padding-left: 18px;
  border-left: 1px solid #cbd6e2;
}
.v4-founder-facts b { color: var(--ink); font-size: 12px; }
.v4-founder-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: 30px;
}
.v4-founder-links a,
.v4-inline-link {
  padding-bottom: 4px;
  border-bottom: 1px solid currentColor;
  color: var(--blue-600);
  font-size: 12px;
  font-weight: 700;
}

/* Ownership */
.v4-ownership { background: var(--white); }
.v4-ownership-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 70px;
  box-shadow: 0 26px 60px rgba(62, 58, 57, .10);
}
.v4-ownership-grid article { padding: clamp(35px, 4vw, 55px); }
.v4-ownership-grid article > p {
  margin: 0;
  font-family: var(--utility);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .15em;
}
.v4-ownership-grid h3 {
  margin: 17px 0 34px;
  font-family: var(--display);
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.25;
  letter-spacing: -.045em;
}
.v4-ownership-grid ul { margin: 0; padding: 0; list-style: none; }
.v4-ownership-grid li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 15px 0;
  border-top: 1px solid currentColor;
  font-size: 13px;
}
.v4-ownership-grid li span {
  font-family: var(--utility);
  font-size: 9px;
  font-weight: 700;
}
.v4-rented {
  color: #53667b;
  background: #e8edf3;
}
.v4-rented article > p,
.v4-rented > p { color: #7b8b9e; }
.v4-rented li { border-color: #cbd5df; }
.v4-owned {
  color: #eef3ff;
  background: var(--blue-600);
}
.v4-owned > p { color: #c2d0ff; }
.v4-owned li { border-color: rgba(255, 255, 255, .23); }
.v4-owned li span { color: var(--cyan-400); }

/* Cases */
.v4-cases { background: var(--paper); }
.v4-case-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 26px;
  margin-top: 70px;
}
.v4-case {
  display: block;
  grid-column: span 3;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}
.v4-case:hover,
.v4-case:focus-visible {
  border-color: #b8ccd5;
  box-shadow: 0 24px 52px rgba(62, 58, 57, .12);
  transform: translateY(-7px);
}
.v4-case-featured {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(310px, .65fr);
  grid-column: 1 / -1;
}
.v4-case-grid > .v4-case:nth-child(2),
.v4-case-grid > .v4-case:nth-child(3),
.v4-case-grid > .v4-case:nth-child(4) { grid-column: span 2; }
.v4-case figure {
  overflow: hidden;
  margin: 0;
  background: #dbe2eb;
}
.v4-case:not(.v4-case-featured) figure { aspect-ratio: 1434 / 996; }
.v4-case-featured figure {
  display: grid;
  align-items: center;
  min-height: 510px;
}
.v4-case figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform .55s cubic-bezier(.2,.7,.2,1);
}
.v4-case:hover figure img,
.v4-case:focus-visible figure img { transform: scale(1.018); }
.v4-case > div { padding: 24px 25px 26px; }
.v4-case-featured > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(35px, 5vw, 68px);
}
.v4-case > div > p {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 0;
  color: var(--muted);
  font-size: 9px;
}
.v4-case > div > p b {
  color: var(--blue-600);
  font-family: var(--utility);
  font-weight: 500;
}
.v4-case h3 {
  margin: 23px 0 10px;
  font-family: var(--utility);
  font-size: clamp(23px, 2.4vw, 34px);
  line-height: 1.2;
  letter-spacing: -.04em;
}
.v4-case small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}
.v4-case strong {
  display: inline-block;
  margin-top: 24px;
  color: var(--blue-600);
  font-size: 11px;
}

/* Coverage */
.v4-coverage {
  color: #eef4fd;
  background: var(--navy-850);
}
.v4-coverage-layout {
  display: grid;
  grid-template-columns: minmax(340px, .7fr) minmax(0, 1.3fr);
  gap: clamp(64px, 10vw, 145px);
  align-items: start;
}
.v4-coverage-intro .v4-section-index { color: var(--cyan-400); }
.v4-coverage-intro h2 { margin-top: 20px; font-size: clamp(42px, 4.3vw, 61px); }
.v4-coverage-intro > p:last-child {
  max-width: 420px;
  margin: 25px 0 0;
  color: #94a8bf;
  font-size: 13px;
  line-height: 1.9;
}
.v4-domain-list { border-top: 1px solid var(--line-dark); }
.v4-domain-list a {
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  min-height: 71px;
  padding: 12px 16px 12px 4px;
  border-bottom: 1px solid var(--line-dark);
  transition: padding .2s ease, color .2s ease, background .2s ease;
}
.v4-domain-list a:hover,
.v4-domain-list a:focus-visible {
  padding-right: 10px;
  padding-left: 14px;
  color: var(--white);
  background: rgba(255, 255, 255, .045);
}
.v4-domain-list span { color: #879db6; font-size: 11px; }
.v4-domain-list b {
  font-family: var(--utility);
  font-size: clamp(15px, 1.6vw, 20px);
  font-weight: 500;
  letter-spacing: -.02em;
}

/* Notes */
.v4-knowledge { background: var(--white); }
.v4-inline-link {
  justify-self: end;
  align-self: end;
  margin-bottom: 9px !important;
}
.v4-note-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 70px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.v4-note-list a {
  display: flex;
  flex-direction: column;
  min-height: 310px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: color .22s ease, background .22s ease;
}
.v4-note-list a:hover,
.v4-note-list a:focus-visible {
  color: var(--white);
  background: var(--navy-800);
}
.v4-note-list span {
  color: var(--blue-600);
  font-family: var(--utility);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .14em;
}
.v4-note-list a:hover span,
.v4-note-list a:focus-visible span { color: var(--cyan-400); }
.v4-note-list h3 {
  margin: 42px 0 25px;
  font-family: var(--display);
  font-size: clamp(22px, 2.2vw, 29px);
  line-height: 1.45;
  letter-spacing: -.045em;
}
.v4-note-list b {
  margin-top: auto;
  color: var(--blue-600);
  font-size: 11px;
}
.v4-note-list a:hover b,
.v4-note-list a:focus-visible b { color: var(--cyan-400); }

/* FAQ */
.v4-faq { background: var(--paper-blue); }
.v4-faq-layout {
  display: grid;
  grid-template-columns: minmax(300px, .68fr) minmax(0, 1.32fr);
  gap: clamp(70px, 11vw, 150px);
  align-items: start;
}
.v4-faq-intro .v4-section-index { margin-bottom: 20px; }
.v4-faq-intro h2 { font-size: clamp(39px, 4.3vw, 60px); }
.v4-faq-intro > p:last-child {
  max-width: 390px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}
.faq-list { border-top: 1px solid #cbd6e2; }
.faq-list details { border-bottom: 1px solid #cbd6e2; }
.faq-list summary {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 22px;
  min-height: 83px;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary > span {
  font-family: var(--display);
  font-size: 17px;
  font-weight: 680;
  line-height: 1.5;
  letter-spacing: -.025em;
}
.faq-list summary b {
  color: var(--blue-600);
  font-size: 9px;
  font-weight: 600;
}
.faq-list .when-open { display: none; }
.faq-list details[open] .when-closed { display: none; }
.faq-list details[open] .when-open { display: block; }
.faq-list details p {
  max-width: 690px;
  margin: -5px 0 0;
  padding: 0 90px 26px 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

/* Contact and footer */
.v4-contact {
  padding: clamp(100px, 10vw, 150px) 0;
  color: #f1f5fd;
  background:
    linear-gradient(120deg, rgba(0, 159, 232, .08), transparent 46%),
    var(--navy-950);
}
.v4-contact .v4-section-index {
  margin-bottom: 21px;
  color: var(--cyan-400);
}
.v4-contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, .65fr);
  gap: clamp(60px, 11vw, 150px);
  align-items: end;
}
.v4-contact h2 { font-size: clamp(48px, 5vw, 72px); }
.v4-contact-layout > div:first-child > p:last-child {
  max-width: 610px;
  margin: 25px 0 0;
  color: #98aac0;
  font-size: 14px;
  line-height: 1.9;
}
.v4-contact-actions { display: grid; gap: 9px; }
.v4-contact-button {
  display: grid;
  gap: 2px;
  width: 100%;
  min-height: 75px;
  padding: 15px 19px;
  border: 1px solid rgba(206, 224, 245, .22);
  color: var(--white);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: color .22s ease, background .22s ease, border-color .22s ease, transform .22s ease;
}
.v4-contact-button span { font-size: 13px; font-weight: 700; }
.v4-contact-button b {
  color: #8397b0;
  font-family: var(--utility);
  font-size: 10px;
  font-weight: 500;
}
.v4-contact-button:hover,
.v4-contact-button:focus-visible {
  color: var(--navy-950);
  border-color: var(--cyan-400);
  background: var(--cyan-400);
  transform: translateX(5px);
}
.v4-contact-button:hover b,
.v4-contact-button:focus-visible b { color: #33515b; }
.site-footer {
  color: #a7b5c6;
  background: #1f1e1d;
}
.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 35px;
  padding: 38px 0;
  border-bottom: 1px solid rgba(205, 222, 243, .12);
}
.footer-brand { width: 172px; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px 27px;
  font-size: 11px;
}
.footer-links a:hover,
.footer-links a:focus-visible { color: var(--cyan-400); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0 23px;
  color: #607187;
  font-size: 9px;
  line-height: 1.7;
}
.footer-bottom p { margin: 0; }
.footer-bottom a:hover,
.footer-bottom a:focus-visible { color: var(--cyan-400); }
.back-top {
  position: fixed;
  z-index: 70;
  right: 18px;
  bottom: 18px;
  min-width: 60px;
  min-height: 32px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, .13);
  color: var(--white);
  background: var(--navy-800);
  box-shadow: 0 10px 25px rgba(2, 10, 23, .2);
  cursor: pointer;
  font-size: 10px;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease, background .2s ease;
}
.back-top:hover,
.back-top:focus-visible { background: var(--blue-600); }
.back-top.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.toast {
  position: fixed;
  z-index: 120;
  right: 18px;
  bottom: 66px;
  padding: 10px 14px;
  border: 1px solid rgba(102, 215, 222, .3);
  color: var(--white);
  background: var(--navy-800);
  box-shadow: 0 12px 28px rgba(2, 10, 23, .22);
  font-size: 11px;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.toast.is-visible { opacity: 1; transform: none; }

/* Motion and accessibility */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .65s cubic-bezier(.2,.7,.2,1), transform .65s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal-delay { transition-delay: .12s; }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }
:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

@media (max-width: 1120px) {
  :root { --shell: min(100% - 52px, 980px); }
  .header-inner { grid-template-columns: 174px 1fr auto; gap: 23px; }
  .brand { width: 170px; }
  .site-nav { gap: 16px; font-size: 12px; }
  .header-cta { padding-right: 12px; padding-left: 12px; }
  .v4-hero-layout {
    grid-template-columns: minmax(0, 1fr) minmax(390px, .85fr);
    gap: 45px;
  }
  .v4-hero h1 { font-size: clamp(49px, 5.6vw, 64px); }
  .v4-discovery-route { grid-template-columns: 180px 1fr; }
  .v4-discovery-route li { padding-right: 13px; padding-left: 13px; }
  .v4-diagnosis-list a {
    grid-template-columns: 52px minmax(220px, 1fr) minmax(250px, 1fr) 170px;
    gap: 19px;
  }
  .v4-system-step { min-height: 495px; padding: 27px 19px 24px; }
  .v4-system-step h3 { font-size: 23px; }
  .v4-founder-layout { grid-template-columns: 330px 1fr; gap: 70px; }
  .v4-case-featured { grid-template-columns: minmax(0, 1.2fr) minmax(290px, .8fr); }
  .v4-case-featured figure { min-height: 440px; }
}

@media (max-width: 900px) {
  :root { --header-height: 72px; }
  .header-inner { grid-template-columns: 1fr auto; }
  .brand { width: 166px; }
  .header-cta { display: none; }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 58px;
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid rgba(62, 58, 57, .25);
    color: var(--ink);
    background: transparent;
    cursor: pointer;
    font-size: 11px;
  }
  .nav-toggle.is-open .nav-open-label { display: none; }
  .nav-toggle.is-open .nav-close-label { display: inline; }
  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 26px;
    display: grid;
    justify-items: stretch;
    width: min(320px, calc(100vw - 52px));
    height: auto;
    padding: 13px 20px;
    border: 1px solid rgba(205, 222, 243, .15);
    color: var(--white);
    background: var(--navy-900);
    box-shadow: 0 24px 50px rgba(2, 10, 23, .32);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .2s ease, visibility .2s ease, transform .2s ease;
  }
  .site-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .site-nav a {
    width: 100%;
    height: auto;
    padding: 10px 0;
    color: #c3cfdf;
  }
  .site-nav a.is-current { color: var(--white); }
  .site-nav a::after { display: none; }
  .nav-is-open { overflow: hidden; }
  .v4-hero-layout {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 30px;
  }
  .v4-hero-copy { max-width: 760px; }
  .v4-hero h1 { font-size: clamp(51px, 8vw, 72px); }
  .v4-proof-wall { max-width: 760px; }
  .v4-discovery-route { grid-template-columns: 1fr; }
  .v4-discovery-route > p {
    grid-template-columns: auto 1fr;
    gap: 15px;
    padding: 18px 0;
  }
  .v4-discovery-route li:first-child { border-left: 0; }
  .v4-heading-split,
  .v4-system-heading {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  .v4-heading-split > p,
  .v4-system-heading > p:last-child {
    max-width: 590px;
  }
  .v4-diagnosis-list a {
    grid-template-columns: 50px 1fr 1fr;
  }
  .v4-diagnosis-list a > b {
    grid-column: 2 / -1;
    justify-self: start;
    margin-top: -10px;
  }
  .v4-system-rail { grid-template-columns: repeat(2, 1fr); }
  .v4-system-step { min-height: 425px; }
  .v4-system-step:nth-child(3) { border-top: 1px solid var(--line-dark); }
  .v4-system-step:nth-child(4) { border-top: 1px solid var(--line-dark); }
  .v4-founder-layout {
    grid-template-columns: 300px 1fr;
    gap: 52px;
  }
  .v4-founder-facts { grid-template-columns: 1fr; }
  .v4-founder-facts span + span {
    padding-left: 0;
    border-top: 1px solid #cbd6e2;
    border-left: 0;
  }
  .v4-case-featured {
    grid-template-columns: 1fr;
  }
  .v4-case,
  .v4-case-grid > .v4-case:nth-child(2),
  .v4-case-grid > .v4-case:nth-child(3),
  .v4-case-grid > .v4-case:nth-child(4) { grid-column: span 3; }
  .v4-case-featured figure { min-height: 0; }
  .v4-case-featured > div { padding: 30px 28px; }
  .v4-coverage-layout {
    grid-template-columns: 1fr;
    gap: 55px;
  }
  .v4-coverage-intro { max-width: 650px; }
  .v4-faq-layout {
    grid-template-columns: 1fr;
    gap: 55px;
  }
  .v4-faq-intro { max-width: 650px; }
  .v4-contact-layout {
    grid-template-columns: 1fr;
    gap: 52px;
  }
  .v4-contact-actions { max-width: 600px; }
}

@media (max-width: 680px) {
  :root {
    --shell: calc(100vw - 36px);
    --header-height: 68px;
  }
  body { font-size: 15px; }
  .site-header { height: var(--header-height); }
  .brand { width: 148px; }
  .site-nav { right: 18px; width: calc(100vw - 36px); }
  .v4-section { padding: 80px 0; }
  .v4-section-heading h2,
  .v4-founder-copy h2,
  .v4-coverage-intro h2,
  .v4-faq-intro h2 {
    font-size: clamp(35px, 10vw, 48px);
  }
  .v4-hero {
    padding-top: calc(var(--header-height) + 45px);
  }
  .v4-hero-layout {
    gap: 44px;
    padding-top: 0;
    padding-bottom: 47px;
  }
  .v4-hero h1 {
    margin-top: 21px;
    font-size: clamp(43px, 12.3vw, 58px);
    line-height: 1.14;
  }
  .v4-hero-lede { margin-top: 23px; font-size: 14px; }
  .v4-hero-actions { margin-top: 28px; }
  .v4-button {
    min-height: 47px;
    padding: 12px 16px;
    font-size: 12px;
  }
  .v4-hero-principles { grid-template-columns: 1fr; margin-top: 34px; }
  .v4-hero-principles div { padding: 12px 0; }
  .v4-hero-principles div + div {
    padding-left: 0;
    border-top: 1px solid var(--line-dark);
    border-left: 0;
  }
  .v4-proof-wall { padding: 9px; }
  .v4-proof-heading { display: grid; gap: 4px; padding: 2px 0 9px; }
  .v4-proof-pair { gap: 6px; margin-top: 6px; }
  .v4-proof-wall a > span {
    align-items: start;
    padding: 8px 9px;
  }
  .v4-proof-wall a > span small { display: none; }
  .v4-discovery-route ol { grid-template-columns: repeat(2, 1fr); }
  .v4-discovery-route li {
    min-height: 78px;
    border-top: 1px solid var(--line-dark);
  }
  .v4-discovery-route li:nth-child(odd) { border-left: 0; }
  .v4-discovery-route li:first-child,
  .v4-discovery-route li:nth-child(2) { border-top: 0; }
  .v4-heading-split { gap: 21px; }
  .v4-diagnosis-list { margin-top: 45px; }
  .v4-diagnosis-list a {
    grid-template-columns: 36px 1fr;
    gap: 11px 15px;
    min-height: 0;
    padding: 23px 4px;
  }
  .v4-diagnosis-list h3 { font-size: 18px; }
  .v4-diagnosis-list p {
    grid-column: 2;
    font-size: 12px;
  }
  .v4-diagnosis-list a > b {
    grid-column: 2;
    margin-top: 4px;
  }
  .v4-system-heading h2 { font-size: clamp(36px, 10vw, 48px); }
  .v4-system-rail { grid-template-columns: 1fr; margin-top: 48px; }
  .v4-system-step {
    min-height: 355px;
    padding: 25px 21px;
    border-top: 1px solid var(--line-dark);
    border-right: 1px solid var(--line-dark);
  }
  .v4-system-step:first-child { border-top: 0; }
  .v4-system-step h3 { margin-top: 30px; font-size: 25px; }
  .v4-system-step > p { min-height: 0; }
  .v4-founder-layout { grid-template-columns: 1fr; gap: 58px; }
  .v4-founder-portrait { max-width: 340px; box-shadow: 15px 15px 0 #dce5f0; }
  .v4-founder-lede { font-size: 13px; }
  .v4-founder-copy blockquote { font-size: 20px; }
  .v4-founder-links { display: grid; justify-items: start; }
  .v4-ownership-grid { grid-template-columns: 1fr; margin-top: 47px; }
  .v4-ownership-grid article { padding: 31px 23px; }
  .v4-ownership-grid h3 { margin-bottom: 25px; font-size: 29px; }
  .v4-case-grid { grid-template-columns: 1fr; gap: 16px; margin-top: 47px; }
  .v4-case,
  .v4-case-featured,
  .v4-case-grid > .v4-case:nth-child(2),
  .v4-case-grid > .v4-case:nth-child(3),
  .v4-case-grid > .v4-case:nth-child(4) { grid-column: auto; }
  .v4-case > div,
  .v4-case-featured > div { padding: 22px 19px 24px; }
  .v4-case > div > p { display: grid; gap: 3px; }
  .v4-case h3 { margin-top: 19px; }
  .v4-domain-list a { grid-template-columns: 105px 1fr; }
  .v4-note-list {
    grid-template-columns: 1fr;
    margin-top: 47px;
  }
  .v4-note-list a { min-height: 230px; padding: 23px; }
  .v4-note-list h3 { margin-top: 29px; font-size: 23px; }
  .v4-inline-link {
    justify-self: start;
    align-self: start;
    margin-bottom: 0 !important;
  }
  .v4-faq-layout { gap: 40px; }
  .faq-list summary { min-height: 74px; gap: 14px; }
  .faq-list summary > span { font-size: 15px; }
  .faq-list summary b { font-size: 8px; }
  .faq-list details p { padding-right: 8px; font-size: 12px; }
  .v4-contact { padding: 82px 0; }
  .v4-contact h2 { font-size: clamp(42px, 12vw, 58px); }
  .v4-contact-layout { gap: 40px; }
  .footer-top { display: block; padding: 31px 0 25px; }
  .footer-links { justify-content: flex-start; margin-top: 27px; }
  .footer-bottom { display: block; }
  .footer-bottom p + p { margin-top: 6px; }
  .back-top { right: 11px; bottom: 11px; }
  .toast { right: 11px; bottom: 57px; }
}

@media (max-width: 400px) {
  .v4-kicker { font-size: 8px; }
  .v4-hero h1 { font-size: 42px; }
  .v4-button { width: 100%; }
  .v4-domain-list a { grid-template-columns: 1fr; gap: 5px; padding: 14px 4px; }
}

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