@charset "utf-8";

/*
 * Sanniao homepage / modern discovery-system direction
 * Keeps the original brand palette and real project assets.
 */
:root {
  --v5-ink: #292627;
  --v5-ink-2: #3e3a39;
  --v5-ink-3: #666160;
  --v5-blue: #009fe8;
  --v5-blue-deep: #008ccf;
  --v5-sky: #87d0f4;
  --v5-mist: #edf8fd;
  --v5-cloud: #f6fafc;
  --v5-line: #dbe8ee;
  --v5-night: #202b30;
  --v5-white: #fff;
  --shell: min(1320px, calc(100vw - 64px));
  --header-height: 92px;
}

html { background: var(--v5-white); }
body {
  color: var(--v5-ink);
  background: var(--v5-white);
  overflow-x: clip;
}
.shell { width: var(--shell); }
::selection { color: #fff; background: var(--v5-blue); }

/* Header */
.site-header {
  position: absolute;
  height: var(--header-height);
  color: var(--v5-ink);
  border: 0;
  background: transparent;
}
.site-header.is-scrolled {
  height: 76px;
  border: 0;
  background: rgba(255, 255, 255, .86);
  box-shadow: 0 12px 40px rgba(41, 38, 39, .08);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
}
.header-inner {
  grid-template-columns: 186px minmax(0, 1fr) auto;
  gap: clamp(26px, 3vw, 54px);
}
.brand { width: 178px; }
.site-nav {
  gap: clamp(19px, 2vw, 33px);
  font-size: 13px;
  font-weight: 560;
}
.site-nav a { color: #5d5959; }
.site-nav a::after { display: none; }
.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-current { color: var(--v5-blue); }
.site-nav a.is-current::before {
  position: absolute;
  bottom: 24px;
  left: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--v5-blue);
  content: "";
  transform: translateX(-50%);
}
.header-cta {
  min-height: 46px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: var(--v5-ink);
  box-shadow: none;
  font-size: 13px;
  font-weight: 650;
}
.header-cta::after { content: "  ↗"; }
.header-cta:hover,
.header-cta:focus-visible {
  border-color: transparent;
  color: #fff;
  background: var(--v5-blue);
  transform: translateY(-2px);
}

/* Hero thesis */
.v4-hero {
  position: relative;
  min-height: 980px;
  padding: 150px 0 0;
  color: var(--v5-ink);
  background:
    radial-gradient(circle at 78% 19%, rgba(135, 208, 244, .40), transparent 26%),
    radial-gradient(circle at 18% 5%, rgba(0, 159, 232, .08), transparent 24%),
    linear-gradient(180deg, #fbfdfe 0%, #f1f9fc 78%, #fff 100%);
  overflow: hidden;
}
.v4-hero::before {
  position: absolute;
  top: 92px;
  right: -10vw;
  width: 62vw;
  height: 62vw;
  border: 1px solid rgba(0, 159, 232, .10);
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 72px rgba(0, 159, 232, .025),
    0 0 0 144px rgba(0, 159, 232, .018);
  pointer-events: none;
}
.v4-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(460px, .95fr);
  gap: clamp(48px, 6vw, 96px);
  align-items: center;
}
.v4-hero-copy { max-width: 690px; }
.v4-kicker {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 28px;
  color: #767273;
  font-family: var(--utility);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: .17em;
}
.v4-kicker::before {
  width: 28px;
  height: 1px;
  background: var(--v5-blue);
  content: "";
}
.v4-kicker span { color: var(--v5-blue); }
.v4-hero h1 {
  max-width: none;
  margin: 0;
  color: var(--v5-ink);
  font-family: var(--display);
  font-size: clamp(64px, 6.4vw, 90px);
  font-weight: 680;
  letter-spacing: -.072em;
  line-height: 1.04;
}
.v4-hero h1 span {
  display: inline-block;
  color: var(--v5-blue);
  background: none;
}
.v4-hero-lede {
  max-width: 610px;
  margin: 33px 0 0;
  color: #656162;
  font-size: 17px;
  line-height: 1.9;
}
.v4-hero-actions {
  display: flex;
  gap: 13px;
  margin-top: 37px;
}
.v4-button {
  min-height: 58px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 680;
}
.v4-button::after { content: "↗"; margin-left: 17px; }
.v4-button-primary {
  border-color: var(--v5-blue);
  color: #fff;
  background: var(--v5-blue);
  box-shadow: 0 15px 35px rgba(0, 159, 232, .22);
}
.v4-button-primary:hover,
.v4-button-primary:focus-visible {
  border-color: var(--v5-ink);
  color: #fff;
  background: var(--v5-ink);
  transform: translateY(-3px);
}
.v4-button-quiet {
  border-color: rgba(41, 38, 39, .18);
  color: var(--v5-ink);
  background: rgba(255, 255, 255, .55);
}
.v4-button-quiet:hover,
.v4-button-quiet:focus-visible {
  border-color: var(--v5-ink);
  color: var(--v5-ink);
  background: #fff;
  transform: translateY(-3px);
}
.v4-hero-principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 48px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid rgba(41, 38, 39, .12);
}
.v4-hero-principles div {
  padding: 0 18px;
  border-right: 1px solid rgba(41, 38, 39, .10);
}
.v4-hero-principles div:first-child { padding-left: 0; }
.v4-hero-principles div:last-child { border-right: 0; }
.v4-hero-principles dt {
  color: var(--v5-blue);
  font-family: var(--utility);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: .15em;
}
.v4-hero-principles dd {
  margin: 7px 0 0;
  color: #777273;
  font-size: 12px;
}

/* Signature: a live buyer-discovery path, grounded in real project work. */
.v5-query-stage {
  position: relative;
  min-height: 642px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: 34px 34px 104px 34px;
  color: #fff;
  background:
    radial-gradient(circle at 98% 0%, rgba(0, 159, 232, .25), transparent 30%),
    linear-gradient(145deg, #252b2e, #182126);
  box-shadow: 0 36px 90px rgba(28, 42, 48, .20);
  overflow: hidden;
}
.v5-query-stage::after {
  position: absolute;
  right: -85px;
  bottom: -85px;
  width: 230px;
  height: 230px;
  border: 1px solid rgba(135, 208, 244, .25);
  border-radius: 50%;
  content: "";
  box-shadow: 0 0 0 34px rgba(135, 208, 244, .035), 0 0 0 68px rgba(135, 208, 244, .025);
}
.v5-stage-head,
.v5-stage-foot {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: #90a5ae;
  font-family: var(--utility);
  font-size: 9px;
  font-weight: 720;
  letter-spacing: .13em;
}
.v5-stage-head span { display: inline-flex; align-items: center; gap: 9px; color: var(--v5-sky); }
.v5-stage-head i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--v5-blue);
  box-shadow: 0 0 0 6px rgba(0, 159, 232, .12);
  animation: v5-pulse 2.4s ease-in-out infinite;
}
.v5-buyer-query {
  position: relative;
  z-index: 2;
  margin-top: 27px;
  padding: 21px 22px 23px;
  border: 1px solid rgba(135, 208, 244, .22);
  border-radius: 20px;
  background: rgba(135, 208, 244, .07);
}
.v5-buyer-query span {
  color: var(--v5-sky);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
}
.v5-buyer-query p {
  margin: 10px 0 0;
  color: #fff;
  font-family: var(--utility);
  font-size: clamp(18px, 1.65vw, 24px);
  font-weight: 540;
  letter-spacing: -.02em;
  line-height: 1.35;
}
.v5-discovery-flow {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 0;
  margin: 18px 0;
}
.v5-discovery-flow::before {
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 36px;
  width: 1px;
  background: linear-gradient(var(--v5-sky), var(--v5-blue));
  content: "";
  opacity: .55;
}
.v5-discovery-flow div {
  position: relative;
  display: grid;
  grid-template-columns: 72px 1fr auto;
  align-items: center;
  min-height: 58px;
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.v5-discovery-flow div:last-child { border-bottom: 0; }
.v5-discovery-flow div::before {
  position: absolute;
  left: 32px;
  width: 9px;
  height: 9px;
  border: 2px solid #20292d;
  border-radius: 50%;
  background: var(--v5-sky);
  content: "";
  transform: translateX(-50%);
}
.v5-discovery-flow span {
  padding-left: 0;
  color: #71858e;
  font-family: var(--utility);
  font-size: 8px;
  font-weight: 760;
  letter-spacing: .12em;
}
.v5-discovery-flow b { font-size: 14px; font-weight: 650; }
.v5-discovery-flow small { color: #8fa0a7; font-size: 11px; }
.v5-live-result {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 154px 1fr;
  gap: 20px;
  align-items: center;
  padding: 12px;
  border-radius: 18px;
  color: #fff;
  background: #fff;
  transition: transform .25s ease, box-shadow .25s ease;
}
.v5-live-result:hover,
.v5-live-result:focus-visible { transform: translateY(-4px); box-shadow: 0 18px 44px rgba(0, 0, 0, .28); }
.v5-live-result img {
  width: 154px;
  height: 96px;
  border-radius: 11px;
  object-fit: cover;
}
.v5-live-result > span { display: grid; gap: 2px; }
.v5-live-result small { color: var(--v5-blue); font-size: 8px; font-weight: 760; letter-spacing: .12em; }
.v5-live-result b { color: var(--v5-ink); font-family: var(--utility); font-size: 18px; }
.v5-live-result em { color: #767173; font-family: var(--utility); font-size: 10px; font-style: normal; }
.v5-stage-foot {
  justify-content: flex-start;
  gap: 9px;
  margin-top: 18px;
}
.v5-stage-foot span {
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 999px;
}

.v4-discovery-route {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 34px;
  align-items: center;
  margin: 80px 0 -66px;
  padding: 27px 30px;
  border: 1px solid rgba(0, 159, 232, .12);
  border-radius: 28px;
  color: var(--v5-ink);
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 30px 70px rgba(38, 63, 75, .10);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}
.v4-discovery-route p { display: grid; gap: 3px; margin: 0; }
.v4-discovery-route p b { color: var(--v5-ink); font-size: 14px; }
.v4-discovery-route p span { color: #8b8585; font-size: 11px; }
.v4-discovery-route ol {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.v4-discovery-route li {
  position: relative;
  display: grid;
  gap: 2px;
  padding: 0 24px;
  border-left: 1px solid var(--v5-line);
}
.v4-discovery-route li::after {
  position: absolute;
  top: 50%;
  right: -4px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--v5-blue);
  content: "";
  transform: translateY(-50%);
}
.v4-discovery-route li:last-child::after { display: none; }
.v4-discovery-route li span { color: var(--v5-blue); font-family: var(--utility); font-size: 9px; font-weight: 760; }
.v4-discovery-route li strong { color: var(--v5-ink); font-size: 14px; }
.v4-discovery-route li small { color: #8a8585; font-size: 10px; }

/* Shared editorial rhythm */
.v4-section { padding: clamp(116px, 11vw, 170px) 0; }
.v4-section-heading { margin-bottom: 64px; }
.v4-section-index {
  margin: 0 0 21px;
  color: var(--v5-blue);
  font-family: var(--utility);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: .17em;
}
.v4-section h2,
.v4-contact h2 {
  margin: 0;
  color: var(--v5-ink);
  font-family: var(--display);
  font-size: clamp(49px, 4.7vw, 70px);
  font-weight: 630;
  letter-spacing: -.055em;
  line-height: 1.12;
}
.v4-heading-split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .52fr);
  gap: clamp(60px, 11vw, 150px);
  align-items: end;
}
.v4-heading-split > p {
  max-width: 430px;
  margin: 0;
  color: #777273;
  font-size: 14px;
  line-height: 1.9;
}

/* Diagnosis */
.v4-diagnosis { padding-top: 180px; background: #fff; }
.v4-diagnosis-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.v4-diagnosis-list a {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "tag result" "title title" "copy copy";
  min-height: 300px;
  padding: 38px 40px;
  border: 1px solid transparent;
  border-radius: 30px;
  color: var(--v5-ink);
  background: var(--v5-cloud);
  overflow: hidden;
  transition: background .28s ease, transform .28s ease, box-shadow .28s ease;
}
.v4-diagnosis-list a:nth-child(2),
.v4-diagnosis-list a:nth-child(4) { transform: translateY(32px); }
.v4-diagnosis-list a::after {
  position: absolute;
  right: -90px;
  bottom: -90px;
  width: 190px;
  height: 190px;
  border: 1px solid rgba(0, 159, 232, .14);
  border-radius: 50%;
  content: "";
  transition: transform .4s ease;
}
.v4-diagnosis-list a:hover,
.v4-diagnosis-list a:focus-visible {
  background: var(--v5-mist);
  box-shadow: 0 25px 60px rgba(28, 63, 79, .09);
  transform: translateY(-5px);
}
.v4-diagnosis-list a:nth-child(2):hover,
.v4-diagnosis-list a:nth-child(2):focus-visible,
.v4-diagnosis-list a:nth-child(4):hover,
.v4-diagnosis-list a:nth-child(4):focus-visible { transform: translateY(27px); }
.v4-diagnosis-list a:hover::after { transform: scale(1.3); }
.v4-diagnosis-list a > span {
  grid-area: tag;
  color: var(--v5-blue);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: .08em;
}
.v4-diagnosis-list h3 {
  grid-area: title;
  max-width: 480px;
  margin: 44px 0 13px;
  font-size: clamp(26px, 2.35vw, 35px);
  font-weight: 620;
  letter-spacing: -.04em;
  line-height: 1.22;
}
.v4-diagnosis-list p {
  grid-area: copy;
  max-width: 470px;
  margin: 0;
  color: #777273;
  font-size: 13px;
  line-height: 1.8;
}
.v4-diagnosis-list b {
  grid-area: result;
  align-self: start;
  color: var(--v5-ink);
  font-size: 11px;
  font-weight: 650;
}
.v4-diagnosis-list b::after { content: " ↗"; color: var(--v5-blue); }

/* Connected service system */
.v4-system {
  color: var(--v5-ink);
  background:
    radial-gradient(circle at 0 15%, rgba(135, 208, 244, .35), transparent 24%),
    var(--v5-mist);
}
.v4-system .shell {
  display: grid;
  grid-template-columns: minmax(400px, .86fr) minmax(0, 1.14fr);
  gap: clamp(60px, 7vw, 96px);
  align-items: start;
}
.v4-system-heading {
  display: block;
  position: sticky;
  top: 126px;
  min-width: 0;
  margin: 0;
}
.v4-system-heading h2 { font-size: clamp(46px, 3.9vw, 56px); }
.v4-system-heading h2 span { color: var(--v5-blue); }
.v4-system-heading > p:last-child {
  width: min(100%, 430px);
  max-width: 430px;
  margin: 28px 0 0;
  color: #696566;
  font-size: 14px;
  line-height: 1.9;
}
.v4-system-rail {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  min-width: 0;
}
.v4-system-step {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  grid-template-areas: "code code" "title title" "copy facts" "link link";
  gap: 0 42px;
  min-height: 334px;
  padding: 39px 42px;
  border: 1px solid rgba(0, 159, 232, .09);
  border-radius: 32px;
  color: var(--v5-ink);
  background: rgba(255, 255, 255, .88);
  box-shadow: 0 16px 50px rgba(29, 65, 82, .055);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease;
}
.v4-system-step:hover,
.v4-system-step:focus-visible {
  color: var(--v5-ink);
  background: #fff;
  box-shadow: 0 28px 70px rgba(29, 65, 82, .12);
  transform: translateX(-8px);
}
.v4-system-step::after {
  position: absolute;
  top: -66px;
  right: -66px;
  width: 164px;
  height: 164px;
  border-radius: 50%;
  background: rgba(135, 208, 244, .16);
  content: "";
}
.v4-system-step:nth-child(2)::after { background: rgba(0, 159, 232, .13); }
.v4-system-step:nth-child(3)::after { background: rgba(135, 208, 244, .25); }
.v4-system-step:nth-child(4)::after { background: rgba(0, 159, 232, .20); }
.v4-step-code {
  grid-area: code;
  color: var(--v5-blue);
  font-family: var(--utility);
  font-size: 9px;
  font-weight: 760;
  letter-spacing: .15em;
}
.v4-system-step h3 {
  grid-area: title;
  margin: 28px 0 22px;
  font-size: clamp(34px, 3vw, 44px);
  font-weight: 620;
  letter-spacing: -.045em;
}
.v4-system-step > p {
  grid-area: copy;
  max-width: 380px;
  margin: 0;
  color: #6f6a6b;
  font-size: 13px;
  line-height: 1.85;
}
.v4-system-step dl {
  grid-area: facts;
  display: grid;
  grid-template-columns: 42px 1fr;
  align-content: start;
  gap: 7px 9px;
  margin: 0;
  font-size: 10px;
}
.v4-system-step dt { color: var(--v5-blue); font-weight: 700; }
.v4-system-step dd { margin: 0; color: #716c6d; }
.v4-system-step > b {
  grid-area: link;
  align-self: end;
  margin-top: 28px;
  color: var(--v5-ink);
  font-size: 12px;
  font-weight: 680;
}
.v4-system-step > b::after { content: "  ↗"; color: var(--v5-blue); }

/* Founder */
.v4-founder { background: #fff; }
.v4-founder-layout {
  display: grid;
  grid-template-columns: minmax(380px, .82fr) minmax(0, 1.18fr);
  gap: clamp(70px, 10vw, 145px);
  align-items: center;
}
.v4-founder-portrait {
  position: relative;
  min-height: 700px;
  border-radius: 34px 34px 128px 34px;
  background: var(--v5-mist);
  overflow: hidden;
}
.v4-founder-portrait::after {
  position: absolute;
  inset: auto 0 0;
  height: 48%;
  background: linear-gradient(transparent, rgba(27, 31, 33, .74));
  content: "";
}
.v4-founder-portrait img { width: 100%; height: 700px; object-fit: cover; filter: grayscale(1) contrast(1.06); }
.v4-founder-portrait p {
  position: absolute;
  z-index: 2;
  right: 34px;
  bottom: 34px;
  left: 34px;
  display: grid;
  gap: 5px;
  margin: 0;
  color: #fff;
}
.v4-founder-portrait p span { color: var(--v5-sky); font-family: var(--utility); font-size: 9px; font-weight: 720; letter-spacing: .15em; }
.v4-founder-portrait p b { font-size: 18px; font-weight: 620; }
.v4-founder-copy h2 { font-size: clamp(50px, 5vw, 72px); }
.v4-founder-lede {
  max-width: 680px;
  margin: 31px 0 0;
  color: #6b6667;
  font-size: 15px;
  line-height: 1.95;
}
.v4-founder-copy blockquote {
  max-width: 690px;
  margin: 40px 0 0;
  padding: 0 0 0 28px;
  border-left: 4px solid var(--v5-blue);
  color: var(--v5-ink);
  font-size: clamp(24px, 2.4vw, 33px);
  font-weight: 580;
  letter-spacing: -.03em;
  line-height: 1.5;
}
.v4-founder-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 38px;
}
.v4-founder-facts span {
  display: grid;
  grid-template-columns: 82px 1fr;
  padding: 12px 0;
  border-bottom: 1px solid var(--v5-line);
  color: #777273;
  font-size: 12px;
}
.v4-founder-facts b { color: var(--v5-blue); }
.v4-founder-links { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 31px; }
.v4-founder-links a {
  padding-bottom: 5px;
  border-bottom: 1px solid rgba(41, 38, 39, .25);
  color: var(--v5-ink);
  font-size: 12px;
  font-weight: 650;
}
.v4-founder-links a::after { content: "  ↗"; color: var(--v5-blue); }

/* Ownership contrast */
.v4-ownership {
  padding-bottom: calc(clamp(116px, 11vw, 170px) + 54px);
  color: #fff;
  background: var(--v5-ink);
}
.v4-ownership .v4-section-index { color: var(--v5-sky); }
.v4-ownership h2 { color: #fff; }
.v4-ownership .v4-heading-split > p { color: #b9b1b2; }
.v4-ownership-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.v4-ownership-grid article {
  min-height: 510px;
  padding: 46px;
  border: 0;
  border-radius: 38px;
}
.v4-rented { color: #fff; background: #343031; }
.v4-owned {
  color: #fff;
  background:
    radial-gradient(circle at 92% 5%, rgba(135, 208, 244, .48), transparent 30%),
    var(--v5-blue);
  transform: translateY(54px);
}
.v4-ownership-grid article > p { color: rgba(255, 255, 255, .64); font-family: var(--utility); font-size: 9px; font-weight: 760; letter-spacing: .16em; }
.v4-ownership-grid h3 { margin: 20px 0 62px; color: #fff; font-size: clamp(34px, 3.3vw, 46px); font-weight: 620; letter-spacing: -.04em; }
.v4-ownership-grid ul { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.v4-ownership-grid li {
  display: grid;
  grid-template-columns: 42px 1fr;
  align-items: center;
  min-height: 59px;
  border-top: 1px solid rgba(255, 255, 255, .16);
  color: rgba(255, 255, 255, .84);
  font-size: 13px;
}
.v4-ownership-grid li span { color: rgba(255, 255, 255, .48); font-family: var(--utility); font-size: 9px; }

/* Live work */
.v4-cases { background: #fff; }
.v4-case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 72px 24px;
}
.v4-case {
  display: block;
  border: 0;
  color: var(--v5-ink);
  background: transparent;
  overflow: visible;
}
.v4-case:hover,
.v4-case:focus-visible { color: var(--v5-ink); background: transparent; transform: none; }
.v4-case-featured {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  grid-column: 1 / -1;
  gap: 32px;
  align-items: stretch;
  padding: 16px;
  border-radius: 38px;
  background: var(--v5-mist);
}
.v4-case figure {
  position: relative;
  margin: 0;
  border-radius: 28px;
  background: #e6eef2;
  overflow: hidden;
}
.v4-case:not(.v4-case-featured) figure { aspect-ratio: 1.42 / 1; }
.v4-case figure::after {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: inherit;
  content: "";
  pointer-events: none;
}
.v4-case figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .65s cubic-bezier(.2,.7,.2,1); }
.v4-case:hover figure img { transform: scale(1.035); }
.v4-case > div { padding: 23px 2px 0; }
.v4-case-featured > div { display: flex; flex-direction: column; justify-content: flex-end; padding: 40px 30px 42px 8px; }
.v4-case > div > p { display: flex; justify-content: space-between; gap: 16px; margin: 0; color: #817b7c; font-size: 10px; }
.v4-case > div > p b { color: var(--v5-blue); font-family: var(--utility); font-weight: 650; }
.v4-case h3 { margin: 16px 0 0; font-family: var(--utility); font-size: clamp(25px, 2.4vw, 35px); font-weight: 650; letter-spacing: -.035em; }
.v4-case small { display: block; max-width: 470px; margin-top: 13px; color: #777273; font-size: 12px; line-height: 1.8; }
.v4-case strong { display: inline-block; margin-top: 24px; color: var(--v5-ink); font-size: 11px; font-weight: 660; }
.v4-case strong::after { content: "  ↗"; color: var(--v5-blue); }

/* Coverage */
.v4-coverage {
  background:
    radial-gradient(circle at 85% 100%, rgba(135, 208, 244, .34), transparent 32%),
    var(--v5-cloud);
}
.v4-coverage-layout {
  display: grid;
  grid-template-columns: minmax(390px, .82fr) minmax(0, 1.18fr);
  gap: clamp(62px, 8vw, 108px);
  align-items: start;
}
.v4-coverage-intro { position: sticky; top: 126px; }
.v4-coverage-intro h2 { font-size: clamp(46px, 4.1vw, 59px); }
.v4-coverage-intro > p:last-child { max-width: 420px; margin: 27px 0 0; color: #777273; font-size: 13px; line-height: 1.9; }
.v4-domain-list { border-top: 1px solid #cedde4; }
.v4-domain-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 82px;
  padding: 0 4px;
  border-bottom: 1px solid #cedde4;
  color: var(--v5-ink);
  transition: padding .22s ease, color .22s ease;
}
.v4-domain-list a:hover,
.v4-domain-list a:focus-visible { padding: 0 15px; color: var(--v5-blue); }
.v4-domain-list span { font-size: 18px; font-weight: 570; }
.v4-domain-list b { color: #827d7e; font-family: var(--utility); font-size: 11px; font-weight: 500; }
.v4-domain-list b::after { content: "  ↗"; color: var(--v5-blue); }

/* Notes */
.v4-knowledge { background: #fff; }
.v4-inline-link {
  justify-self: end;
  padding: 12px 0;
  border: 0;
  border-bottom: 1px solid rgba(41, 38, 39, .25);
  border-radius: 0;
  font-size: 12px;
  font-weight: 650;
}
.v4-inline-link::after { content: "  ↗"; color: var(--v5-blue); }
.v4-note-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.v4-note-list a {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 360px;
  padding: 34px;
  border: 0;
  border-radius: 30px;
  color: var(--v5-ink);
  background: var(--v5-cloud);
  overflow: hidden;
  transition: transform .28s ease, background .28s ease;
}
.v4-note-list a:nth-child(2) { background: var(--v5-mist); }
.v4-note-list a:nth-child(3) { color: #fff; background: var(--v5-night); }
.v4-note-list a:hover,
.v4-note-list a:focus-visible { color: var(--v5-ink); background: #e9f6fc; transform: translateY(-7px); }
.v4-note-list a:nth-child(3):hover,
.v4-note-list a:nth-child(3):focus-visible { color: #fff; background: #172228; }
.v4-note-list span { color: var(--v5-blue); font-family: var(--utility); font-size: 9px; font-weight: 760; letter-spacing: .14em; }
.v4-note-list a:nth-child(3) span { color: var(--v5-sky); }
.v4-note-list h3 { margin: 70px 0 0; font-size: clamp(23px, 2.2vw, 31px); font-weight: 590; letter-spacing: -.035em; line-height: 1.42; }
.v4-note-list b { margin-top: auto; font-size: 11px; font-weight: 650; }
.v4-note-list b::after { content: "  ↗"; color: var(--v5-blue); }

/* FAQ */
.v4-faq { background: var(--v5-cloud); }
.v4-faq-layout {
  display: grid;
  grid-template-columns: minmax(390px, .82fr) minmax(0, 1.18fr);
  gap: clamp(62px, 8vw, 108px);
  align-items: start;
}
.v4-faq-intro { position: sticky; top: 126px; }
.v4-faq-intro h2 { font-size: clamp(46px, 4.1vw, 59px); }
.v4-faq-intro > p:last-child { max-width: 410px; margin: 26px 0 0; color: #777273; font-size: 13px; line-height: 1.9; }
.faq-list { border-top: 1px solid #cedde4; }
.faq-list details { border-bottom: 1px solid #cedde4; background: transparent; }
.faq-list summary { min-height: 91px; padding: 0; color: var(--v5-ink); }
.faq-list summary span { padding-right: 28px; font-size: 17px; font-weight: 590; }
.faq-list summary b { color: var(--v5-blue); font-size: 10px; font-weight: 650; }
.faq-list details p { max-width: 680px; margin: -4px 0 0; padding: 0 90px 30px 0; color: #777273; font-size: 13px; line-height: 1.9; }

/* Contact */
.v4-contact {
  position: relative;
  padding: clamp(115px, 11vw, 170px) 0;
  color: #fff;
  background:
    radial-gradient(circle at 85% 10%, rgba(135, 208, 244, .58), transparent 28%),
    var(--v5-blue);
  overflow: hidden;
}
.v4-contact::before {
  position: absolute;
  right: -110px;
  bottom: -180px;
  width: 620px;
  height: 620px;
  border: 1px solid rgba(255, 255, 255, .24);
  border-radius: 50%;
  content: "";
  box-shadow: 0 0 0 90px rgba(255, 255, 255, .035), 0 0 0 180px rgba(255, 255, 255, .025);
}
.v4-contact .v4-section-index { color: #fff; opacity: .72; }
.v4-contact-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(380px, .65fr);
  gap: clamp(70px, 11vw, 150px);
  align-items: end;
}
.v4-contact h2 { color: #fff; font-size: clamp(58px, 6vw, 84px); }
.v4-contact-layout > div:first-child > p:last-child { max-width: 610px; margin: 27px 0 0; color: rgba(255, 255, 255, .78); font-size: 14px; line-height: 1.9; }
.v4-contact-actions { display: grid; gap: 10px; }
.v4-contact-button {
  min-height: 76px;
  padding: 15px 20px;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 18px;
  color: #fff;
  background: rgba(255, 255, 255, .08);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.v4-contact-button span { font-size: 13px; }
.v4-contact-button b { color: rgba(255, 255, 255, .68); font-size: 10px; }
.v4-contact-button:hover,
.v4-contact-button:focus-visible {
  color: var(--v5-ink);
  border-color: #fff;
  background: #fff;
  transform: translateX(7px);
}
.v4-contact-button:hover b,
.v4-contact-button:focus-visible b { color: #777273; }

/* Footer */
.site-footer { color: #aaa5a6; background: #1c1a1b; }
.footer-top { padding-top: 60px; }
.footer-brand { width: 180px; }
.footer-links a:hover { color: var(--v5-sky); }
.footer-bottom { border-top-color: rgba(255, 255, 255, .10); }
.back-top { border-radius: 999px; background: var(--v5-ink); }

@keyframes v5-pulse {
  0%, 100% { box-shadow: 0 0 0 5px rgba(0, 159, 232, .10); }
  50% { box-shadow: 0 0 0 10px rgba(0, 159, 232, .02); }
}

@media (max-width: 1180px) {
  :root { --shell: min(100% - 44px, 1120px); }
  .site-nav { gap: 17px; }
  .site-nav a { font-size: 12px; }
  .v4-hero-layout { grid-template-columns: minmax(0, 1fr) minmax(420px, .86fr); gap: 42px; }
  .v4-hero h1 { font-size: clamp(61px, 6.8vw, 78px); }
  .v5-query-stage { min-height: 612px; padding: 24px; }
  .v5-live-result { grid-template-columns: 132px 1fr; }
  .v5-live-result img { width: 132px; height: 88px; }
  .v4-system .shell,
  .v4-coverage-layout,
  .v4-faq-layout { gap: 64px; }
}

@media (max-width: 980px) {
  :root { --shell: min(100% - 36px, 920px); --header-height: 74px; }
  .site-header { height: var(--header-height); }
  .site-header.is-scrolled { height: 68px; }
  .header-inner { grid-template-columns: 166px 1fr auto; gap: 18px; }
  .brand { width: 160px; }
  .header-cta { display: none; }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 42px;
    border: 1px solid rgba(41, 38, 39, .16);
    border-radius: 999px;
    color: var(--v5-ink);
    background: rgba(255, 255, 255, .78);
  }
  .site-nav {
    position: fixed;
    top: 76px;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 2px;
    height: auto;
    padding: 18px;
    border: 0;
    border-radius: 24px;
    background: rgba(32, 43, 48, .98);
    box-shadow: 0 28px 70px rgba(20, 31, 36, .28);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a {
    width: 100%;
    min-height: 48px;
    padding: 0 15px;
    border-radius: 12px;
    color: rgba(255, 255, 255, .73);
  }
  .site-nav a:hover,
  .site-nav a:focus-visible,
  .site-nav a.is-current { color: #fff; background: rgba(255, 255, 255, .08); }
  .site-nav a.is-current::before { display: none; }

  .v4-hero { min-height: 0; padding-top: 120px; }
  .v4-hero-layout { grid-template-columns: 1fr; gap: 60px; }
  .v4-hero-copy { max-width: 760px; }
  .v4-hero h1 { max-width: 760px; font-size: clamp(62px, 9.5vw, 82px); }
  .v5-query-stage { width: min(100%, 700px); min-height: 0; }
  .v4-discovery-route { grid-template-columns: 1fr; margin-top: 54px; }
  .v4-discovery-route ol { border-top: 1px solid var(--v5-line); padding-top: 20px; }
  .v4-discovery-route li:first-child { padding-left: 0; border-left: 0; }

  .v4-heading-split { grid-template-columns: 1fr; gap: 25px; }
  .v4-heading-split > p { max-width: 650px; }
  .v4-system .shell,
  .v4-coverage-layout,
  .v4-faq-layout { grid-template-columns: 1fr; }
  .v4-system-heading,
  .v4-coverage-intro,
  .v4-faq-intro { position: static; }
  .v4-system-heading { margin-bottom: 58px; }
  .v4-founder-layout { grid-template-columns: .85fr 1.15fr; gap: 52px; }
  .v4-founder-portrait,
  .v4-founder-portrait img { min-height: 590px; height: 590px; }
  .v4-case-featured { grid-template-columns: 1fr; }
  .v4-case-featured figure { aspect-ratio: 1.6 / 1; }
  .v4-case-featured > div { padding: 18px 16px 26px; }
  .v4-note-list { grid-template-columns: 1fr; }
  .v4-note-list a { min-height: 260px; }
  .v4-note-list h3 { margin-top: 45px; }
  .v4-contact-layout { grid-template-columns: 1fr; align-items: start; }
  .v4-contact-actions { max-width: 620px; }
}

@media (max-width: 720px) {
  :root { --shell: calc(100vw - 36px); }
  .header-inner { grid-template-columns: 1fr auto; }
  .brand { width: 154px; }
  .nav-toggle { width: 58px; height: 40px; }

  .v4-hero { padding-top: 112px; }
  .v4-hero::before { top: 90px; right: -90vw; width: 170vw; height: 170vw; }
  .v4-kicker { margin-bottom: 22px; font-size: 9px; letter-spacing: .13em; }
  .v4-hero h1 { font-size: clamp(48px, 14.5vw, 65px); letter-spacing: -.065em; line-height: 1.08; }
  .v4-hero-lede { margin-top: 25px; font-size: 15px; line-height: 1.82; }
  .v4-hero-actions { display: grid; margin-top: 29px; }
  .v4-button { width: 100%; min-height: 56px; }
  .v4-hero-principles { grid-template-columns: 1fr; gap: 0; margin-top: 35px; padding-top: 0; }
  .v4-hero-principles div { display: grid; grid-template-columns: 82px 1fr; padding: 12px 0; border-right: 0; border-bottom: 1px solid rgba(41, 38, 39, .10); }
  .v4-hero-principles dd { margin: 0; }

  .v5-query-stage { padding: 20px; border-radius: 25px 25px 66px 25px; }
  .v5-stage-head b { display: none; }
  .v5-buyer-query { padding: 18px; }
  .v5-buyer-query p { font-size: 17px; }
  .v5-discovery-flow div { grid-template-columns: 58px 1fr; min-height: 62px; }
  .v5-discovery-flow div::before { left: 28px; }
  .v5-discovery-flow::before { left: 28px; }
  .v5-discovery-flow small { grid-column: 2; margin-top: -10px; }
  .v5-live-result { grid-template-columns: 105px 1fr; gap: 14px; }
  .v5-live-result img { width: 105px; height: 78px; }
  .v5-live-result b { font-size: 15px; }
  .v5-stage-foot { flex-wrap: wrap; }

  .v4-discovery-route { margin: 45px 0 -50px; padding: 22px; border-radius: 22px; }
  .v4-discovery-route ol { grid-template-columns: repeat(2, 1fr); gap: 20px 0; }
  .v4-discovery-route li { padding: 0 15px; }
  .v4-discovery-route li:nth-child(3) { padding-left: 0; border-left: 0; }
  .v4-discovery-route li:nth-child(2)::after { display: none; }

  .v4-section { padding: 100px 0; }
  .v4-diagnosis { padding-top: 135px; }
  .v4-section-heading { margin-bottom: 42px; }
  .v4-section-index { margin-bottom: 16px; }
  .v4-section h2,
  .v4-contact h2 { font-size: clamp(40px, 11.8vw, 56px); letter-spacing: -.05em; }
  .v4-diagnosis-list { grid-template-columns: 1fr; }
  .v4-diagnosis-list a,
  .v4-diagnosis-list a:nth-child(2),
  .v4-diagnosis-list a:nth-child(4) { min-height: 270px; padding: 29px; transform: none; }
  .v4-diagnosis-list a:hover,
  .v4-diagnosis-list a:focus-visible,
  .v4-diagnosis-list a:nth-child(2):hover,
  .v4-diagnosis-list a:nth-child(2):focus-visible,
  .v4-diagnosis-list a:nth-child(4):hover,
  .v4-diagnosis-list a:nth-child(4):focus-visible { transform: translateY(-4px); }
  .v4-diagnosis-list h3 { margin-top: 36px; font-size: 27px; }

  .v4-system .shell { display: block; }
  .v4-system-step { grid-template-columns: 1fr; grid-template-areas: "code" "title" "copy" "facts" "link"; min-height: 0; padding: 29px; }
  .v4-system-step:hover,
  .v4-system-step:focus-visible { transform: translateY(-4px); }
  .v4-system-step dl { margin-top: 22px; }

  .v4-founder-layout { grid-template-columns: 1fr; }
  .v4-founder-portrait,
  .v4-founder-portrait img { min-height: 500px; height: 500px; }
  .v4-founder-portrait { border-radius: 27px 27px 88px 27px; }
  .v4-founder-copy blockquote { padding-left: 20px; font-size: 24px; }
  .v4-founder-facts span { grid-template-columns: 70px 1fr; }

  .v4-ownership-grid { grid-template-columns: 1fr; }
  .v4-ownership-grid article { min-height: 450px; padding: 30px; border-radius: 29px; }
  .v4-owned { transform: none; }
  .v4-ownership-grid h3 { margin-bottom: 42px; }

  .v4-case-grid { grid-template-columns: 1fr; gap: 54px; }
  .v4-case-featured { display: block; grid-column: auto; padding: 11px; border-radius: 28px; }
  .v4-case-featured figure { aspect-ratio: 1.25 / 1; }
  .v4-case:not(.v4-case-featured) figure { aspect-ratio: 1.3 / 1; }
  .v4-case figure { border-radius: 20px; }
  .v4-case-featured > div { padding: 22px 12px 25px; }
  .v4-case > div > p { display: grid; gap: 4px; }

  .v4-coverage-layout,
  .v4-faq-layout { display: block; }
  .v4-coverage-intro,
  .v4-faq-intro { margin-bottom: 48px; }
  .v4-domain-list a { min-height: 72px; }
  .v4-domain-list span { font-size: 15px; }
  .v4-domain-list b { font-size: 9px; }

  .v4-note-list a { min-height: 290px; padding: 28px; }
  .faq-list summary { min-height: 82px; }
  .faq-list summary b { display: none; }
  .faq-list details p { padding-right: 0; }

  .v4-contact { padding: 105px 0; }
  .v4-contact-layout { gap: 52px; }
  .v4-contact-button { border-radius: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  .v5-stage-head i { animation: none; }
  .v4-case figure img,
  .v4-diagnosis-list a,
  .v4-system-step,
  .v4-note-list a { transition: none; }
}