:root {
  --navy-950: #04101d;
  --navy-900: #071525;
  --navy-850: #0a1b2e;
  --navy-800: #0e2237;
  --mist-50: #f5f7f8;
  --mist-100: #edf1f3;
  --mist-200: #d9e0e4;
  --mist-500: #7d8b96;
  --ink: #0d1a26;
  --cyan: #15e7e0;
  --cyan-soft: #a7f6f2;
  --white: #ffffff;
  --line-light: rgba(9, 28, 45, 0.13);
  --line-dark: rgba(255, 255, 255, 0.14);
  --shadow: 0 28px 70px rgba(7, 21, 37, 0.12);
  --radius: 3px;
  --shell: min(1180px, calc(100% - 48px));
  --header-height: 88px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--navy-900);
  font-family: "Avenir Next", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

button,
a,
label {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 4px;
}

::selection {
  color: var(--navy-950);
  background: var(--cyan);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 12px;
  left: 12px;
  padding: 9px 15px;
  color: var(--navy-950);
  background: var(--cyan);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  color: var(--white);
  background: rgba(4, 16, 29, 0.72);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.site-header.scrolled {
  background: rgba(4, 16, 29, 0.94);
  border-color: var(--line-dark);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  transform: rotate(45deg);
}

.brand-mark::before,
.brand-mark::after,
.brand-mark i {
  content: "";
  position: absolute;
  background: var(--cyan);
}

.brand-mark::before {
  width: 13px;
  height: 2px;
}

.brand-mark::after {
  width: 2px;
  height: 13px;
}

.brand-mark i:first-child {
  top: -1px;
  right: -1px;
  width: 10px;
  height: 1px;
}

.brand-mark i:last-child {
  right: -1px;
  bottom: -1px;
  width: 1px;
  height: 10px;
}

.brand-name {
  font-size: 12px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.6vw, 38px);
  font-size: 14px;
}

.site-nav a:not(.nav-cta) {
  position: relative;
  color: rgba(255, 255, 255, 0.76);
  transition: color 0.2s ease;
}

.site-nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--white);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  padding: 10px 18px;
  color: var(--navy-950);
  background: var(--cyan);
  border: 1px solid var(--cyan);
  font-weight: 700;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-cta:hover {
  color: var(--cyan);
  background: transparent;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--white);
  background: transparent;
  border: 1px solid var(--line-dark);
}

.menu-button span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
  transition: transform 0.25s ease;
}

.hero {
  position: relative;
  min-height: 100svh;
  padding: calc(var(--header-height) + 80px) 0 40px;
  overflow: hidden;
  color: var(--white);
  background: var(--navy-950);
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.36;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 90%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(1px);
  pointer-events: none;
}

.hero-glow-one {
  top: 9%;
  right: 8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(21, 231, 224, 0.1), transparent 66%);
}

.hero-glow-two {
  bottom: -20%;
  left: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(47, 100, 147, 0.15), transparent 70%);
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(400px, 0.78fr);
  align-items: center;
  gap: clamp(48px, 7vw, 100px);
}

.eyebrow,
.section-kicker {
  margin: 0 0 28px;
  color: var(--mist-500);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
}

.eyebrow {
  display: flex;
  align-items: center;
  color: rgba(255, 255, 255, 0.62);
}

.eyebrow span {
  display: inline-block;
  width: 34px;
  height: 1px;
  margin-right: 13px;
  background: var(--cyan);
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(54px, 6.9vw, 98px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.07em;
}

.hero h1 span,
.system h2 span,
.contact h2 span {
  color: var(--cyan);
}

.hero-lead {
  max-width: 620px;
  margin: 34px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 18px;
  line-height: 1.9;
}

.hero-actions,
.contact-actions {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-top: 44px;
}

.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 0;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--navy-950);
  background: var(--cyan);
  border-color: var(--cyan);
}

.button-primary:hover {
  color: var(--cyan);
  background: transparent;
}

.text-link,
.back-link {
  display: inline-flex;
  gap: 18px;
  align-items: center;
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
}

.text-link:hover,
.back-link:hover {
  color: var(--white);
  border-color: var(--cyan);
}

.hero-poster {
  position: relative;
  min-height: 530px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.015)),
    var(--navy-850);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 38px 100px rgba(0, 0, 0, 0.26);
}

.poster-corner {
  position: absolute;
  width: 52px;
  height: 52px;
  border-color: var(--cyan);
  opacity: 0.65;
}

.poster-corner-one {
  top: -1px;
  right: -1px;
  border-top: 1px solid;
  border-right: 1px solid;
}

.poster-corner-two {
  bottom: -1px;
  left: -1px;
  border-bottom: 1px solid;
  border-left: 1px solid;
}

.poster-topline {
  position: absolute;
  z-index: 3;
  top: 24px;
  right: 24px;
  left: 24px;
  display: flex;
  justify-content: space-between;
  padding-bottom: 16px;
  color: rgba(255, 255, 255, 0.68);
  border-bottom: 1px solid var(--line-dark);
  font-size: 11px;
  letter-spacing: 0.15em;
}

.signal {
  display: flex;
  align-items: center;
  gap: 7px;
}

.signal i {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(21, 231, 224, 0.85);
}

.orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 270px;
  height: 270px;
  transform: translate(-50%, -50%);
}

.orbit-ring,
.orbit-core,
.orbit-node {
  position: absolute;
  border-radius: 50%;
}

.orbit-ring-one {
  inset: 0;
  border: 1px solid rgba(21, 231, 224, 0.3);
}

.orbit-ring-one::before,
.orbit-ring-one::after {
  content: "";
  position: absolute;
  background: rgba(255, 255, 255, 0.14);
}

.orbit-ring-one::before {
  top: 50%;
  left: -62px;
  width: 394px;
  height: 1px;
}

.orbit-ring-one::after {
  top: -62px;
  left: 50%;
  width: 1px;
  height: 394px;
}

.orbit-ring-two {
  inset: 41px;
  border: 1px dashed rgba(255, 255, 255, 0.22);
}

.orbit-core {
  inset: 91px;
  display: grid;
  place-items: center;
  background: rgba(21, 231, 224, 0.1);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 46px rgba(21, 231, 224, 0.12);
}

.orbit-core b {
  width: 9px;
  height: 9px;
  background: var(--cyan);
  border-radius: 50%;
}

.orbit-node {
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 0 0 13px rgba(21, 231, 224, 0.8);
}

.node-one { top: 26px; left: 61px; }
.node-two { right: 3px; bottom: 92px; }
.node-three { bottom: 22px; left: 55px; }

.poster-label {
  position: absolute;
  z-index: 2;
  display: grid;
  grid-template-columns: auto 1fr;
  min-width: 125px;
  padding: 11px 12px;
  background: rgba(4, 16, 29, 0.82);
  border: 1px solid var(--line-dark);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
}

.poster-label small {
  grid-row: 1 / 3;
  margin-right: 10px;
  color: var(--cyan);
  font-size: 9px;
}

.poster-label strong {
  font-size: 13px;
  line-height: 1.2;
}

.poster-label span {
  color: rgba(255, 255, 255, 0.66);
  font-size: 9px;
}

.label-one { top: 112px; left: 20px; }
.label-two { top: 102px; right: 16px; }
.label-three { bottom: 96px; left: 12px; }
.label-four { right: 23px; bottom: 106px; }

.poster-note {
  position: absolute;
  right: 24px;
  bottom: 15px;
  left: 24px;
  margin: 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 11px;
  text-align: center;
  letter-spacing: 0.08em;
}

.hero-foot {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  margin-top: 70px;
  padding-top: 24px;
  border-top: 1px solid var(--line-dark);
}

.hero-foot > p {
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.capability-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.capability-row span {
  padding: 5px 12px;
  color: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line-dark);
  font-size: 11px;
}

.section-light {
  background: var(--mist-50);
}

.statement {
  padding: 145px 0;
}

.statement-grid {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) minmax(240px, 0.38fr);
  gap: 48px;
  align-items: start;
}

.section-index {
  color: #aab4bb;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.section-kicker {
  color: #687985;
  text-transform: uppercase;
}

.statement h2,
.section-heading h2,
.process-intro h2,
.brief-copy h2 {
  margin: 0;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.14;
  letter-spacing: -0.055em;
}

.statement h2 span {
  position: relative;
  white-space: nowrap;
}

.statement h2 span::after {
  content: "";
  position: absolute;
  z-index: 0;
  right: 0;
  bottom: 7px;
  left: 0;
  height: 9px;
  background: var(--cyan);
  opacity: 0.55;
}

.statement-side {
  margin: 65px 0 0;
  color: #586a76;
  font-size: 15px;
}

.services {
  padding: 0 0 150px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 64px;
  align-items: end;
  margin-bottom: 64px;
}

.section-heading > p {
  margin: 0 0 9px;
  color: #667884;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-light);
  border-left: 1px solid var(--line-light);
}

.service-card {
  position: relative;
  min-height: 490px;
  padding: 28px 25px 32px;
  background: var(--mist-50);
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  overflow: hidden;
  transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.service-card:hover {
  z-index: 1;
  background: var(--white);
  box-shadow: var(--shadow);
  transform: translateY(-7px);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.card-number {
  color: #8d9aa3;
  font-size: 11px;
  letter-spacing: 0.16em;
}

.card-icon {
  position: relative;
  width: 82px;
  height: 82px;
  margin: 62px 0 42px;
  border: 1px solid #a8b5bd;
}

.card-icon span {
  position: absolute;
  display: block;
  background: var(--ink);
}

.icon-strategy span:first-child {
  top: 18px;
  left: 18px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--ink);
  border-radius: 50%;
}

.icon-strategy span:last-child {
  top: 37px;
  left: 37px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  border-radius: 50%;
}

.icon-content span {
  left: 18px;
  width: 44px;
  height: 1px;
}

.icon-content span:first-child { top: 24px; }
.icon-content span:nth-child(2) { top: 40px; width: 31px; }
.icon-content span:last-child { top: 56px; width: 20px; background: var(--cyan); }

.icon-channel span {
  width: 13px;
  height: 13px;
  background: transparent;
  border: 1px solid var(--ink);
}

.icon-channel span:nth-child(1) { top: 17px; left: 17px; }
.icon-channel span:nth-child(2) { top: 17px; right: 17px; }
.icon-channel span:nth-child(3) { right: 17px; bottom: 17px; }
.icon-channel span:nth-child(4) { bottom: 17px; left: 17px; border-color: var(--cyan); background: var(--cyan); }

.icon-data span {
  bottom: 17px;
  width: 10px;
}

.icon-data span:first-child { left: 17px; height: 22px; }
.icon-data span:nth-child(2) { left: 35px; height: 37px; }
.icon-data span:last-child { left: 53px; height: 49px; background: var(--cyan); }

.service-card h3 {
  margin: 0 0 15px;
  font-size: 23px;
  line-height: 1.3;
}

.service-card p {
  margin: 0;
  color: #697a85;
  font-size: 14px;
}

.service-card ul,
.scenario-output ul {
  margin: 24px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-light);
}

.service-card li {
  position: relative;
  padding-left: 15px;
  color: #40515d;
  font-size: 12px;
}

.service-card li::before {
  content: "";
  position: absolute;
  top: 0.75em;
  left: 0;
  width: 4px;
  height: 4px;
  background: var(--cyan);
}

.system {
  padding: 150px 0;
  color: var(--white);
  background: var(--navy-900);
  overflow: hidden;
}

.system-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.65fr) minmax(520px, 1fr);
  gap: 90px;
  align-items: center;
}

.section-kicker-dark {
  color: rgba(255, 255, 255, 0.68);
}

.system h2 {
  margin: 0;
  font-size: clamp(42px, 5.3vw, 72px);
  line-height: 1.09;
  letter-spacing: -0.06em;
}

.system-copy > p:not(.section-kicker) {
  max-width: 520px;
  margin: 34px 0 0;
  color: rgba(255, 255, 255, 0.6);
}

.button-ghost {
  margin-top: 34px;
  color: var(--cyan);
  background: transparent;
  border-color: rgba(21, 231, 224, 0.48);
}

.button-ghost:hover {
  color: var(--navy-950);
  background: var(--cyan);
  border-color: var(--cyan);
}

.system-map {
  position: relative;
  min-height: 590px;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 54px 54px;
  border: 1px solid var(--line-dark);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.24);
}

.map-axis {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
}

.map-axis-x {
  top: 50%;
  left: 9%;
  width: 82%;
  height: 1px;
}

.map-axis-y {
  top: 9%;
  left: 50%;
  width: 1px;
  height: 82%;
}

.map-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 320px;
  height: 320px;
  border: 1px dashed rgba(21, 231, 224, 0.38);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.map-ring::after {
  content: "";
  position: absolute;
  top: 19px;
  left: 50px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 16px var(--cyan);
}

.map-center {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 142px;
  height: 142px;
  place-content: center;
  text-align: center;
  background: #0a2235;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 60px rgba(21, 231, 224, 0.12);
}

.map-center span,
.map-item small,
.map-item span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 10px;
}

.map-center strong {
  font-size: 25px;
  line-height: 1.2;
}

.map-item {
  position: absolute;
  width: 140px;
  padding: 14px;
  background: rgba(6, 24, 40, 0.93);
  border: 1px solid var(--line-dark);
}

.map-item small,
.map-item span,
.map-item strong {
  display: block;
}

.map-item strong {
  margin: 2px 0;
  color: var(--cyan-soft);
  font-size: 18px;
}

.map-item-one { top: 12%; left: 10%; }
.map-item-two { top: 12%; right: 10%; }
.map-item-three { right: 10%; bottom: 12%; }
.map-item-four { bottom: 12%; left: 10%; }

.scenarios {
  padding: 150px 0 70px;
}

.scenario-list {
  border-top: 1px solid var(--line-light);
}

.scenario {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) minmax(260px, 0.5fr);
  gap: 34px;
  align-items: center;
  min-height: 210px;
  padding: 32px 22px;
  border-bottom: 1px solid var(--line-light);
  transition: background-color 0.25s ease, padding 0.25s ease;
}

.scenario:hover {
  padding-right: 32px;
  padding-left: 32px;
  background: var(--white);
}

.scenario-tag {
  color: #778792;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.scenario-title {
  position: relative;
  padding-left: 74px;
}

.scenario-symbol {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  color: var(--ink);
  background: var(--cyan);
  border-radius: 50%;
  font-size: 20px;
}

.scenario-title h3 {
  margin: 0 0 8px;
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.scenario-title p {
  margin: 0;
  color: #687985;
  font-size: 14px;
}

.scenario-output > span {
  color: #81909a;
  font-size: 11px;
  letter-spacing: 0.12em;
}

.scenario-output ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 10px;
  padding-top: 10px;
}

.scenario-output li {
  color: #43545f;
  font-size: 12px;
}

.process {
  padding: 100px 0 150px;
}

.process-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.7fr) minmax(0, 1fr);
  gap: 100px;
  align-items: start;
}

.process-intro {
  position: sticky;
  top: calc(var(--header-height) + 40px);
}

.process-intro > p:last-child {
  max-width: 420px;
  margin: 28px 0 0;
  color: #687985;
}

.process-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: process;
  border-top: 1px solid var(--line-light);
}

.process-list li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 25px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line-light);
}

.process-number {
  color: #8e9aa3;
  font-size: 12px;
  letter-spacing: 0.15em;
}

.process-list h3 {
  margin: 0 0 10px;
  font-size: 26px;
  line-height: 1.2;
}

.process-list p {
  max-width: 500px;
  margin: 0;
  color: #687985;
}

.brief {
  padding: 145px 0;
  color: var(--white);
  background: #0b2033;
}

.brief-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.66fr) minmax(0, 1fr);
  gap: 90px;
}

.brief-copy h2 {
  color: var(--white);
}

.brief-copy > p:not(.section-kicker) {
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.62);
}

.privacy-note {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  color: var(--cyan-soft);
  font-size: 12px;
}

.privacy-note span {
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border: 1px solid rgba(21, 231, 224, 0.5);
  border-radius: 50%;
  font-size: 10px;
}

.brief-form {
  padding: clamp(28px, 4.5vw, 54px);
  color: var(--ink);
  background: var(--mist-50);
  box-shadow: 0 38px 80px rgba(0, 0, 0, 0.18);
}

.brief-form fieldset {
  margin: 0 0 38px;
  padding: 0;
  border: 0;
}

.brief-form legend {
  width: 100%;
  margin-bottom: 20px;
  font-size: 17px;
  font-weight: 700;
}

.brief-form legend span {
  margin-right: 12px;
  color: #83909a;
  font-size: 11px;
  letter-spacing: 0.12em;
}

.choice-grid,
.radio-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.brief-form label {
  cursor: pointer;
}

.brief-form label input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.brief-form label span {
  display: flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 10px;
  color: #52636e;
  background: var(--white);
  border: 1px solid #d5dde1;
  font-size: 13px;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.brief-form label input:focus-visible + span {
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

.brief-form label input:checked + span {
  color: var(--navy-950);
  background: var(--cyan-soft);
  border-color: var(--cyan);
  font-weight: 700;
}

.radio-row {
  grid-template-columns: repeat(3, 1fr);
}

.brief-button {
  width: 100%;
}

.brief-result {
  margin-top: 18px;
  padding: 18px;
  color: #30424e;
  background: #e8edef;
  border-left: 3px solid var(--cyan);
  font-size: 14px;
}

.brief-result strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
}

.contact {
  position: relative;
  min-height: 700px;
  display: grid;
  place-items: center;
  padding: 130px 0;
  overflow: hidden;
  color: var(--white);
  background: var(--navy-950);
}

.contact-lines {
  position: absolute;
  inset: -25%;
  opacity: 0.45;
  background:
    radial-gradient(circle at center, rgba(21, 231, 224, 0.12), transparent 30%),
    repeating-radial-gradient(circle at center, transparent 0 68px, rgba(255, 255, 255, 0.06) 69px 70px);
}

.contact-lines::before,
.contact-lines::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: rgba(21, 231, 224, 0.2);
  transform: translate(-50%, -50%);
}

.contact-lines::before { width: 1px; height: 100%; }
.contact-lines::after { width: 100%; height: 1px; }

.contact-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.contact h2 {
  max-width: 960px;
  margin: 0 auto;
  font-size: clamp(44px, 6.3vw, 84px);
  line-height: 1.09;
  letter-spacing: -0.065em;
}

.contact-inner > p:not(.section-kicker) {
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.58);
}

.contact-actions {
  justify-content: center;
}

.button-light {
  color: var(--navy-950);
  background: var(--white);
  border-color: var(--white);
}

.button-light:hover {
  color: var(--white);
  background: transparent;
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease, background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, padding 0.25s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js .service-card.is-visible:hover {
  transform: translateY(-7px);
}

.service-card:nth-child(2),
.process-list li:nth-child(2) { transition-delay: 0.06s; }
.service-card:nth-child(3),
.process-list li:nth-child(3) { transition-delay: 0.12s; }
.service-card:nth-child(4),
.process-list li:nth-child(4) { transition-delay: 0.18s; }

@media (max-width: 1040px) {
  .hero-layout {
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.7fr);
    gap: 40px;
  }

  .hero-poster {
    min-height: 470px;
  }

  .orbit {
    transform: translate(-50%, -50%) scale(0.85);
  }

  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-card {
    min-height: 430px;
  }

  .system-layout,
  .brief-layout {
    gap: 54px;
  }

  .scenario {
    grid-template-columns: 90px minmax(0, 1fr) 240px;
  }
}

@media (max-width: 820px) {
  :root {
    --shell: min(100% - 36px, 680px);
    --header-height: 74px;
  }

  .menu-button {
    position: relative;
    z-index: 102;
    display: block;
  }

  .menu-button[aria-expanded="true"] span:nth-child(2) {
    transform: translateY(3px) rotate(45deg);
  }

  .menu-button[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-3px) rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    z-index: 101;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 18px;
    padding: 100px max(28px, calc((100vw - 680px) / 2));
    background: rgba(4, 16, 29, 0.98);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-12px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }

  .site-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  html:not(.js) .header-inner {
    flex-wrap: wrap;
    padding-block: 14px;
  }

  html:not(.js) .menu-button {
    display: none;
  }

  html:not(.js) .site-nav {
    position: static;
    width: 100%;
    flex-direction: row;
    justify-content: flex-start;
    gap: 14px 22px;
    padding: 10px 0 4px;
    background: transparent;
    visibility: visible;
    opacity: 1;
    transform: none;
    flex-wrap: wrap;
  }

  html:not(.js) .site-nav a {
    font-size: 13px;
  }

  html:not(.js) .nav-cta {
    margin-top: 0;
  }

  .site-nav a {
    font-size: 24px;
  }

  .nav-cta {
    margin-top: 14px;
    font-size: 15px !important;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 60px);
  }

  .hero-layout,
  .system-layout,
  .brief-layout,
  .process-layout {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: clamp(50px, 11vw, 76px);
  }

  .hero-poster {
    min-height: 530px;
    margin-top: 16px;
  }

  .statement,
  .system,
  .brief {
    padding: 105px 0;
  }

  .statement-grid {
    grid-template-columns: 50px 1fr;
    gap: 26px;
  }

  .statement-side {
    grid-column: 2;
    margin-top: 0;
  }

  .services {
    padding-bottom: 105px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .system-map {
    min-height: 560px;
  }

  .scenarios {
    padding-top: 105px;
  }

  .scenario {
    grid-template-columns: 80px 1fr;
  }

  .scenario-output {
    grid-column: 2;
  }

  .process {
    padding: 70px 0 105px;
  }

  .process-layout {
    gap: 60px;
  }

  .process-intro {
    position: static;
  }

  .contact {
    min-height: 620px;
  }
}

@media (max-width: 560px) {
  :root {
    --shell: calc(100% - 32px);
  }

  .brand-name {
    font-size: 10px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .hero {
    padding-bottom: 28px;
  }

  .eyebrow,
  .section-kicker {
    margin-bottom: 20px;
    font-size: 11px;
  }

  .hero h1 {
    font-size: clamp(42px, 13.7vw, 62px);
    letter-spacing: -0.075em;
  }

  .hero-lead {
    margin-top: 26px;
    font-size: 16px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 22px;
    margin-top: 34px;
  }

  .hero-poster {
    min-height: 430px;
  }

  .orbit {
    transform: translate(-50%, -50%) scale(0.68);
  }

  .poster-label {
    min-width: 105px;
    padding: 9px;
  }

  .label-one { top: 94px; left: 8px; }
  .label-two { top: 88px; right: 7px; }
  .label-three { bottom: 77px; left: 7px; }
  .label-four { right: 8px; bottom: 84px; }

  .hero-foot {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    margin-top: 42px;
  }

  .capability-row {
    justify-content: flex-start;
  }

  .statement,
  .system,
  .brief {
    padding: 84px 0;
  }

  .statement-grid {
    grid-template-columns: 1fr;
  }

  .section-index {
    display: none;
  }

  .statement-side {
    grid-column: 1;
  }

  .statement h2,
  .section-heading h2,
  .process-intro h2,
  .brief-copy h2 {
    font-size: clamp(35px, 10.8vw, 48px);
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: 0;
  }

  .card-icon {
    margin: 38px 0 30px;
  }

  .system-layout {
    gap: 48px;
  }

  .system h2 {
    font-size: clamp(38px, 11vw, 50px);
  }

  .system-map {
    min-height: 440px;
  }

  .map-ring {
    width: 235px;
    height: 235px;
  }

  .map-center {
    width: 112px;
    height: 112px;
  }

  .map-center strong {
    font-size: 20px;
  }

  .map-item {
    width: 108px;
    padding: 9px;
  }

  .map-item strong {
    font-size: 15px;
  }

  .map-item-one { top: 7%; left: 4%; }
  .map-item-two { top: 7%; right: 4%; }
  .map-item-three { right: 4%; bottom: 7%; }
  .map-item-four { bottom: 7%; left: 4%; }

  .scenarios {
    padding: 84px 0 45px;
  }

  .scenario {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 28px 8px;
  }

  .scenario:hover {
    padding-right: 14px;
    padding-left: 14px;
  }

  .scenario-title {
    padding-left: 64px;
  }

  .scenario-output {
    grid-column: 1;
    padding-left: 64px;
  }

  .process {
    padding: 50px 0 84px;
  }

  .process-list li {
    grid-template-columns: 45px 1fr;
    gap: 15px;
    padding: 28px 0;
  }

  .brief-layout {
    gap: 42px;
  }

  .brief-form {
    margin-inline: -5px;
    padding: 24px 18px;
  }

  .choice-grid,
  .radio-row {
    grid-template-columns: 1fr 1fr;
  }

  .radio-row label:last-child {
    grid-column: 1 / -1;
  }

  .contact {
    min-height: 560px;
    padding: 90px 0;
  }

  .contact h2 {
    font-size: clamp(39px, 12vw, 54px);
  }

  .contact-actions {
    flex-direction: column;
    gap: 22px;
  }
}

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .js .service-card.is-visible:hover {
    transform: none;
  }
}