:root {
  --ink: #071a2f;
  --muted: #63788e;
  --line: #d9e5f1;
  --soft: #f4f8fb;
  --soft-2: #eef4f8;
  --dark: #061629;
  --dark-2: #0a1e35;
  --blue: #176bff;
  --blue-2: #2e8dff;
  --cyan: #12d6c6;
  --cyan-soft: #dffbf8;
  --gold: #d7a83d;
  --green: #4fb06d;
  --white: #ffffff;
  --max: 1220px;
  --header: 76px;
  --shadow: 0 24px 80px rgba(7, 26, 47, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--soft);
  line-height: 1.6;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

img {
  max-width: 100%;
  display: block;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  height: var(--header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(22px, 5vw, 64px);
  color: var(--white);
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header[data-elevated="true"] {
  background: rgba(248, 251, 254, 0.94);
  color: var(--ink);
  border-bottom-color: rgba(8, 36, 65, 0.1);
  backdrop-filter: blur(18px);
}

body.nav-open .site-header {
  background: rgba(248, 251, 254, 0.98);
  color: var(--ink);
  border-bottom-color: rgba(8, 36, 65, 0.1);
}

.brand {
  width: 188px;
  height: 54px;
  display: flex;
  align-items: center;
  position: relative;
}

.brand img {
  height: 46px;
  object-fit: contain;
  transition: opacity 180ms ease;
}

.brand-logo {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
}

.brand-logo-light {
  opacity: 0;
}

.site-header[data-elevated="true"] .brand-logo-dark,
body.nav-open .site-header .brand-logo-dark {
  opacity: 0;
}

.site-header[data-elevated="true"] .brand-logo-light,
body.nav-open .site-header .brand-logo-light {
  opacity: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 15px;
}

.site-nav a {
  color: currentColor;
  opacity: 0.86;
}

.site-nav a:hover {
  opacity: 1;
}

.nav-cta {
  height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
}

.site-header[data-elevated="true"] .nav-cta {
  border-color: rgba(23, 107, 255, 0.22);
  background: #eaf3ff;
  color: var(--blue);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  position: relative;
}

.site-header[data-elevated="true"] .nav-toggle,
body.nav-open .site-header .nav-toggle {
  border-color: rgba(23, 107, 255, 0.18);
  background: #eaf3ff;
}

.nav-toggle span {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: currentColor;
  transition: transform 180ms ease, top 180ms ease;
}

.nav-toggle span:first-child {
  top: 15px;
}

.nav-toggle span:last-child {
  top: 25px;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  top: 20px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  top: 20px;
  transform: rotate(-45deg);
}

.section {
  padding: clamp(76px, 9vw, 122px) clamp(22px, 5vw, 64px);
  position: relative;
  isolation: isolate;
}

#services,
#model,
#cases,
#about,
#contact {
  scroll-margin-top: calc(var(--header) + 18px);
}

.section-dark {
  background: var(--dark);
  color: var(--white);
}

.section-soft {
  background: var(--soft);
}

.section-head {
  width: min(100%, var(--max));
  margin: 0 auto 44px;
}

.section-head-split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.7fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
  margin-bottom: 52px;
}

.section-head-split p {
  margin: 0;
  font-size: 17px;
}

.section-head.narrow {
  max-width: 820px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: 72px;
  line-height: 1.06;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

h2 {
  margin-bottom: 16px;
  font-size: 42px;
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 24px;
  line-height: 1.24;
  letter-spacing: 0;
}

p {
  color: var(--muted);
}

.section-dark p {
  color: #afc4da;
}

.hero {
  min-height: min(900px, 92vh);
  position: relative;
  display: flex;
  align-items: center;
  padding: calc(var(--header) + 46px) clamp(22px, 5vw, 64px) 58px;
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 36%;
  background: linear-gradient(180deg, rgba(6, 22, 41, 0), rgba(6, 22, 41, 0.86));
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 430px);
  gap: 64px;
  align-items: center;
}

.hero-inner > * {
  min-width: 0;
}

.hero-copy-block {
  padding-top: 18px;
}

.hero-copy {
  max-width: 760px;
  margin-bottom: 30px;
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid transparent;
  font-weight: 760;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--cyan);
  color: #043a40;
}

.button-ghost {
  border-color: rgba(255, 255, 255, 0.32);
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
}

.hero-engine {
  position: relative;
  min-height: 470px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(circle at 50% 44%, rgba(18, 214, 198, 0.16), transparent 40%),
    rgba(255, 255, 255, 0.045);
  overflow: hidden;
  border-radius: 8px;
}

.hero-engine::before,
.hero-engine::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 310px;
  height: 310px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(18, 214, 198, 0.24);
  border-radius: 50%;
}

.hero-engine::after {
  width: 430px;
  height: 430px;
  border-color: rgba(46, 141, 255, 0.18);
}

.engine-core {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  width: 218px;
  min-height: 218px;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 26px;
  border-radius: 50%;
  text-align: center;
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(18, 214, 198, 0.28), rgba(23, 107, 255, 0.28)),
    rgba(6, 22, 41, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 24px 80px rgba(4, 11, 20, 0.28);
}

.engine-core span,
.engine-node span,
.resource-wave span,
.model-stages span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 820;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.engine-core strong {
  margin: 12px 0 8px;
  font-size: 26px;
  line-height: 1.18;
}

.engine-core em {
  color: #b7cde3;
  font-size: 12px;
  font-style: normal;
}

.engine-node {
  position: absolute;
  z-index: 3;
  width: 154px;
  padding: 16px;
  color: var(--white);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.075);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.engine-node small {
  display: block;
  margin-top: 8px;
  color: #b7cde3;
  font-size: 12px;
  line-height: 1.5;
}

.engine-media {
  left: 24px;
  top: 40px;
}

.engine-touch {
  right: 24px;
  top: 88px;
}

.engine-result {
  right: 38px;
  bottom: 56px;
}

.engine-feedback {
  left: 30px;
  bottom: 70px;
}

.hero-routes {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 0.9fr 1.25fr 0.9fr;
  gap: 12px;
}

.hero-routes a {
  min-height: 112px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 20px 22px;
  color: #d9eaff;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.035);
}

.hero-routes a:hover {
  background: rgba(255, 255, 255, 0.07);
}

.hero-routes span {
  color: var(--cyan);
  font-weight: 820;
  font-size: 14px;
}

.hero-routes strong {
  font-size: 22px;
  line-height: 1.2;
}

.hero-routes small {
  color: #b7cde3;
  line-height: 1.5;
}

.hero-routes .route-primary {
  border-top-color: var(--cyan);
  background: linear-gradient(90deg, rgba(18, 214, 198, 0.16), rgba(23, 107, 255, 0.12));
}

.ecosystem-section {
  background: var(--white);
}

.ecosystem-wrap,
.services-showcase,
.model-story,
.solution-focus,
.case-layout,
.delivery-board,
.about-grid,
.contact-panel {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.ecosystem-wrap {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.ecosystem-copy p {
  font-size: 18px;
}

.resource-wave {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  position: relative;
  border: 0;
}

.resource-wave::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 46%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--blue), var(--gold));
  opacity: 0.38;
}

.resource-wave article {
  min-height: 250px;
  padding: 28px 22px;
  position: relative;
  z-index: 1;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 46px rgba(7, 26, 47, 0.06);
}

.resource-wave article:nth-child(even) {
  margin-top: 34px;
}

.resource-wave strong {
  display: block;
  margin: 50px 0 10px;
  font-size: 20px;
  white-space: nowrap;
}

.services-section {
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(18, 214, 198, 0.08), transparent 34%),
    linear-gradient(180deg, #edf4f8 0%, #f8fbfe 50%, #ffffff 100%);
  border-top: 1px solid rgba(8, 36, 65, 0.08);
}

.services-section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 118px;
  background:
    linear-gradient(90deg, rgba(23, 107, 255, 0.14), rgba(18, 214, 198, 0.1), rgba(215, 168, 61, 0.12));
  clip-path: polygon(0 0, 100% 0, 100% 44%, 0 100%);
  z-index: -1;
}

.services-section::after {
  content: "";
  position: absolute;
  right: clamp(24px, 7vw, 120px);
  top: 148px;
  width: min(520px, 44vw);
  height: 260px;
  background-image:
    linear-gradient(rgba(23, 107, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 107, 255, 0.1) 1px, transparent 1px);
  background-size: 28px 28px;
  transform: skewY(-8deg);
  opacity: 0.58;
  z-index: -1;
}

.services-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.service-parallel,
.case-featured,
.case-stack article {
  border-radius: 8px;
}

.service-parallel {
  --accent: var(--cyan);
  min-height: 430px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 251, 255, 0.96)),
    var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 22px 64px rgba(7, 26, 47, 0.08);
  position: relative;
  overflow: hidden;
}

.service-parallel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: var(--accent);
}

.service-parallel::after {
  content: "";
  position: absolute;
  right: -22px;
  top: 34px;
  width: 138px;
  height: 66px;
  border-top: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  opacity: 0.16;
  transform: skewX(-18deg);
}

.service-cpm {
  --accent: var(--blue);
}

.service-cpa {
  --accent: var(--cyan);
}

.service-cps {
  --accent: var(--gold);
}

.service-topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 56px;
}

.service-parallel h3 {
  max-width: 340px;
  margin-bottom: 18px;
  font-size: 28px;
}

.service-parallel p {
  margin-bottom: 0;
  font-size: 17px;
}

.service-code {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  background: color-mix(in srgb, var(--accent) 12%, #ffffff);
  color: var(--accent);
  font-weight: 820;
  font-size: 20px;
  line-height: 1;
}

.service-mode {
  color: var(--ink);
  font-size: 14px;
  font-weight: 760;
}

.service-flow {
  margin-top: auto;
  padding-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  border-top: 1px solid rgba(8, 36, 65, 0.1);
}

.service-flow span {
  min-height: 38px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  color: #35516d;
  font-size: 14px;
  font-weight: 680;
  background: rgba(234, 243, 255, 0.72);
  border-left: 2px solid color-mix(in srgb, var(--accent) 66%, #ffffff);
}

.model-section {
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(6, 22, 41, 0.94), rgba(8, 31, 56, 0.98)),
    var(--dark);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(8, 36, 65, 0.12);
}

.model-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(185, 215, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(185, 215, 255, 0.07) 1px, transparent 1px),
    linear-gradient(120deg, rgba(18, 214, 198, 0.12), transparent 38%, rgba(23, 107, 255, 0.1));
  background-size: 44px 44px, 44px 44px, 100% 100%;
  opacity: 0.64;
  z-index: -1;
}

.model-story {
  display: grid;
  grid-template-columns: 0.68fr 1.32fr;
  gap: 64px;
  align-items: center;
}

.model-copy {
  position: sticky;
  top: 112px;
}

.model-label {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 8px 12px;
  color: #dffbf8;
  font-size: 13px;
  font-weight: 820;
  background: rgba(18, 214, 198, 0.1);
  border-left: 3px solid var(--cyan);
}

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

.model-copy p {
  font-size: 18px;
}

.model-signal-board {
  margin-top: 34px;
  display: grid;
  gap: 10px;
}

.model-signal-board span {
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  color: #d8e8ff;
  font-weight: 720;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-left-color: rgba(18, 214, 198, 0.46);
}

.model-visual {
  min-width: 0;
  padding: 28px;
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.095), rgba(255, 255, 255, 0.035)),
    rgba(6, 22, 41, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.13);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.24);
}

.model-stages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  position: relative;
}

.model-stages::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 48%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--blue), #b9d7ff);
  opacity: 0.38;
}

.model-stages article {
  min-height: 340px;
  padding: 28px 18px;
  position: relative;
  z-index: 1;
  color: var(--white);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.045)),
    rgba(8, 36, 65, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
}

.model-stages article::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--cyan);
}

.model-stages article:nth-child(2),
.model-stages article:nth-child(4) {
  margin-top: 34px;
}

.model-stages article:nth-child(2)::before {
  background: var(--blue);
}

.model-stages article:nth-child(3)::before {
  background: #63e6f1;
}

.model-stages article:nth-child(4)::before {
  background: #b9d7ff;
}

.model-stages article p {
  color: #b7cde3;
}

.model-stages h3 {
  margin-top: 76px;
  color: var(--white);
  font-size: 22px;
}

.model-stages span {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #071a2f;
  background: var(--cyan);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 820;
  letter-spacing: 0;
}

.industry-section {
  background:
    linear-gradient(180deg, rgba(6, 22, 41, 0.94), rgba(6, 22, 41, 1)),
    var(--dark);
}

.solution-focus {
  display: grid;
  grid-template-columns: minmax(0, 1.26fr) minmax(300px, 0.74fr);
  gap: 20px;
}

.solution-lead,
.solution-stack article {
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.052);
}

.solution-lead {
  min-height: 430px;
  padding: 42px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background:
    linear-gradient(145deg, rgba(18, 214, 198, 0.14), rgba(23, 107, 255, 0.08)),
    rgba(255, 255, 255, 0.045);
}

.solution-tag,
.case-meta {
  display: block;
  width: fit-content;
  margin-bottom: 26px;
  color: var(--cyan);
  font-weight: 820;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.solution-lead h3 {
  max-width: 760px;
  font-size: 34px;
}

.solution-lead p {
  max-width: 760px;
}

.solution-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.solution-points span {
  padding: 10px 12px;
  color: #d8e8ff;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.solution-stack {
  display: grid;
  gap: 20px;
}

.solution-stack article {
  min-height: 205px;
  padding: 30px;
}

.solution-stack .solution-tag {
  margin-bottom: 28px;
}

.cases-section {
  overflow: hidden;
  background:
    linear-gradient(180deg, #f8fbfe 0%, #eef4f8 100%);
}

.cases-section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 130px;
  background:
    linear-gradient(90deg, rgba(6, 22, 41, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0));
  z-index: -1;
}

.case-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.72fr);
  gap: 24px;
  align-items: stretch;
}

.case-featured {
  min-height: 500px;
  padding: 44px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(18, 214, 198, 0.14), rgba(23, 107, 255, 0.1)),
    linear-gradient(180deg, #071a2f, #0a2542);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 28px 88px rgba(7, 26, 47, 0.18);
  position: relative;
  overflow: hidden;
}

.case-featured::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 8px;
  background: linear-gradient(var(--cyan), var(--blue));
}

.case-featured::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: 52px;
  width: 300px;
  height: 96px;
  border-top: 2px solid rgba(18, 214, 198, 0.28);
  border-bottom: 2px solid rgba(46, 141, 255, 0.22);
  transform: rotate(-16deg);
}

.case-featured > * {
  position: relative;
  z-index: 1;
}

.case-featured-top {
  margin-bottom: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.case-featured-top span {
  padding: 8px 12px;
  color: #071a2f;
  font-size: 13px;
  font-weight: 820;
  background: var(--cyan);
}

.case-featured-top .case-meta {
  margin-bottom: 0;
}

.case-featured h3 {
  max-width: 760px;
  color: var(--white);
  font-size: 36px;
}

.case-featured p {
  max-width: 760px;
  color: #c3d6e8;
  font-size: 18px;
}

.case-featured strong {
  display: block;
  margin-top: 18px;
  color: var(--white);
  font-size: 18px;
}

.case-points {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.case-points span {
  padding: 10px 12px;
  color: #dffbf8;
  background: rgba(255, 255, 255, 0.075);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.case-stack {
  display: grid;
  gap: 16px;
}

.case-stack article {
  min-height: 156px;
  padding: 24px 26px;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px 18px;
  align-items: start;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 1), rgba(248, 251, 254, 0.96));
  border: 1px solid var(--line);
  box-shadow: 0 18px 48px rgba(7, 26, 47, 0.06);
  position: relative;
  overflow: hidden;
}

.case-stack article::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--blue);
}

.case-stack article:nth-child(2)::before {
  background: var(--cyan);
}

.case-stack article:nth-child(3)::before {
  background: var(--gold);
}

.case-index {
  grid-row: span 2;
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  font-size: 14px;
  font-weight: 820;
  background: #eaf3ff;
}

.case-stack article:nth-child(2) .case-index {
  color: #087c76;
  background: #dffbf8;
}

.case-stack article:nth-child(3) .case-index {
  color: #9a7118;
  background: #fff3d5;
}

.case-stack article p {
  grid-column: 2;
  margin-bottom: 0;
}

.case-stack .case-meta {
  margin-bottom: 14px;
}

.case-stack h3 {
  font-size: 22px;
}

.process-section {
  background: var(--white);
}

.delivery-board {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 54px;
  align-items: center;
}

.delivery-copy p {
  font-size: 18px;
}

.delivery-loop {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  position: relative;
}

.delivery-loop::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 58%;
  height: 58%;
  transform: translate(-50%, -50%);
  border: 1px dashed rgba(23, 107, 255, 0.24);
  border-radius: 50%;
}

.delivery-loop article {
  min-height: 190px;
  padding: 28px;
  position: relative;
  z-index: 1;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.delivery-loop strong {
  display: block;
  margin: 36px 0 8px;
  font-size: 22px;
}

.about-grid,
.contact-panel {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(30px, 6vw, 78px);
  align-items: start;
}

.about-grid h2 {
  margin-bottom: 24px;
}

.about-panel {
  padding: 34px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.about-panel h3 {
  color: var(--white);
}

.about-principles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0;
}

.about-principles span {
  padding: 10px 12px;
  color: #dffbf8;
  background: rgba(18, 214, 198, 0.1);
  border: 1px solid rgba(18, 214, 198, 0.22);
}

.compliance-note {
  margin-bottom: 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-section {
  background: var(--soft-2);
}

.contact-panel {
  align-items: stretch;
}

.contact-copy {
  padding-top: 14px;
}

.lead-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(22px, 4vw, 34px);
  box-shadow: var(--shadow);
}

.lead-form label {
  display: grid;
  gap: 8px;
}

.lead-form span {
  color: var(--ink);
  font-size: 14px;
  font-weight: 760;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  font: inherit;
  color: var(--ink);
  background: #fbfdff;
  resize: vertical;
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
  outline: 2px solid rgba(23, 107, 255, 0.18);
  border-color: var(--blue);
}

.wide {
  grid-column: 1 / -1;
}

.form-status {
  grid-column: 1 / -1;
  min-height: 20px;
  margin: 0;
  color: #087c76;
  font-weight: 760;
}

.privacy-note {
  margin: 0;
  font-size: 13px;
}

.site-footer {
  padding: 42px clamp(22px, 5vw, 64px);
  background: var(--dark);
  color: #afc4da;
  display: grid;
  justify-items: center;
  gap: 8px;
  text-align: center;
}

.site-footer img {
  width: 210px;
  margin-bottom: 10px;
}

.site-footer p {
  margin: 0;
  color: #afc4da;
}

@media (max-width: 1120px) {
  h1 {
    font-size: 60px;
  }

  h2 {
    font-size: 40px;
  }

  .hero-inner,
  .ecosystem-wrap,
  .model-story {
    grid-template-columns: 1fr;
  }

  .section-head-split {
    grid-template-columns: 1fr;
  }

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

  .hero-routes,
  .services-showcase,
  .case-layout {
    grid-template-columns: 1fr;
  }

  .model-copy {
    position: static;
  }
}

@media (max-width: 820px) {
  :root {
    --header: 68px;
  }

  .site-header {
    padding-inline: 18px;
  }

  .brand {
    width: 168px;
  }

  .brand img {
    height: 42px;
  }

  .nav-toggle {
    display: block;
    z-index: 22;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 21;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    padding: 88px 28px 32px;
    background: rgba(248, 251, 254, 0.98);
    color: var(--ink);
    transform: translateX(100%);
    transition: transform 220ms ease;
  }

  .site-nav[data-open="true"] {
    transform: translateX(0);
  }

  .site-nav a {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
    font-size: 22px;
    opacity: 1;
  }

  .nav-cta {
    margin-top: 22px;
    justify-content: center;
    border-color: rgba(23, 107, 255, 0.22);
    background: #eaf3ff;
    color: var(--blue);
  }

  .section {
    padding-block: 74px;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header) + 40px);
  }

  h1 {
    font-size: 44px;
    line-height: 1.1;
  }

  h2 {
    font-size: 34px;
  }

  h3 {
    font-size: 22px;
  }

  .hero-copy,
  .ecosystem-copy p,
  .model-copy p,
  .service-parallel p,
  .case-featured p {
    font-size: 16px;
  }

  .hero-engine {
    min-height: 520px;
  }

  .engine-core {
    width: 190px;
    min-height: 190px;
  }

  .engine-core strong {
    font-size: 22px;
  }

  .hero-routes,
  .resource-wave,
  .model-visual,
  .model-stages,
  .about-grid,
  .contact-panel,
  .lead-form {
    grid-template-columns: 1fr;
  }

  .resource-wave::before {
    display: none;
  }

  .model-stages::before {
    display: none;
  }

  .model-stages article:nth-child(2),
  .model-stages article:nth-child(4) {
    margin-top: 0;
  }

  .resource-wave article {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .resource-wave article:last-child {
    border-bottom: 0;
  }

  .service-parallel,
  .case-featured {
    min-height: auto;
    padding: 30px;
  }

  .service-topline {
    margin-bottom: 38px;
  }

  .service-parallel h3,
  .case-featured h3 {
    font-size: 28px;
  }

  .button {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .section {
    padding-inline: 18px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-engine {
    min-height: auto;
    display: grid;
    gap: 12px;
    padding: 22px;
  }

  .hero-engine::before,
  .hero-engine::after {
    display: none;
  }

  .engine-core {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    min-height: 170px;
    transform: none;
    border-radius: 8px;
  }

  .engine-node,
  .engine-media,
  .engine-touch,
  .engine-result,
  .engine-feedback {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    width: 100%;
    padding: 14px;
  }

  .service-parallel,
  .model-stages article,
  .case-stack article,
  .about-panel,
  .lead-form {
    padding: 22px;
  }

  .section-head-split {
    gap: 18px;
  }

  .service-flow,
  .case-stack article {
    grid-template-columns: 1fr;
  }

  .case-index,
  .case-stack article p {
    grid-column: auto;
  }

  .case-index {
    grid-row: auto;
  }
}