/* Industrial dark redesign: dependency-free and safe for static hosting. */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #080b09;
  --bg-raised: #0e120f;
  --surface: #131814;
  --surface-soft: rgba(20, 26, 21, 0.86);
  --line: rgba(221, 238, 222, 0.13);
  --line-strong: rgba(159, 232, 112, 0.34);
  --text: #eef3ed;
  --text-soft: #a6b0a5;
  --text-muted: #6f7a70;
  --accent: #9fe870;
  --accent-dark: #172613;
  --danger: #ffb36a;
  --header-h: 72px;
  --container: 1360px;
  --transition: 220ms cubic-bezier(.2, .7, .2, 1);
  --font: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  opacity: 0;
  transition: opacity 400ms ease;
}

body.loaded { opacity: 1; }

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background: radial-gradient(circle at 50% 0%, rgba(159, 232, 112, 0.07), transparent 34rem);
}

::selection {
  color: #081008;
  background: var(--accent);
}

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

button, input, textarea, select { font: inherit; }

button { color: inherit; }

ul { list-style: none; }

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1200;
  padding: 8px 12px;
  color: #081008;
  background: var(--accent);
  transform: translateY(-150%);
}

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

.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

#particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .34;
}

.data-stream {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: .72;
  background-image:
    linear-gradient(rgba(221, 238, 222, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(221, 238, 222, .025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent, #000 15%, #000 85%, transparent);
}

.glass {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(17, 22, 18, .78);
  box-shadow: inset 0 1px rgba(255, 255, 255, .025);
}

/* Header */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}

.header.scrolled {
  border-color: var(--line);
  background: rgba(8, 11, 9, .9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 190px;
  font-size: 1.02rem;
  font-weight: 650;
  letter-spacing: 0;
}

.logo img {
  width: 34px;
  height: 34px;
}

.logo-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
  line-height: 1.1;
}

.logo-copy strong {
  font-size: .94rem;
  font-weight: 650;
  white-space: nowrap;
}

.logo-copy small {
  color: var(--text-muted);
  font-size: .52rem;
  font-weight: 500;
  text-transform: none;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 34px);
}

.nav a {
  position: relative;
  color: var(--text-soft);
  font-size: .88rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav a:not(.nav-contact)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -25px;
  height: 2px;
  background: var(--accent);
  transition: right var(--transition);
}

.nav a:hover,
.nav a.active { color: var(--text); }

.nav a:hover::after,
.nav a.active::after { right: 0; }

.nav .nav-contact {
  min-width: 102px;
  padding: 9px 16px;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-align: center;
}

.nav .nav-contact:hover {
  color: #091008;
  background: var(--accent);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--surface);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  margin: 5px auto;
  background: var(--text);
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Hero */
.hero {
  position: relative;
  z-index: 1;
  min-height: 92dvh;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: #080b09;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero::before {
  background:
    linear-gradient(90deg, rgba(6, 9, 7, .96) 0%, rgba(6, 9, 7, .84) 38%, rgba(6, 9, 7, .36) 70%, rgba(6, 9, 7, .38) 100%),
    linear-gradient(0deg, #080b09 0%, transparent 42%);
}

.hero::after {
  inset: var(--header-h) 0 0;
  opacity: .42;
  background-image:
    linear-gradient(rgba(221, 238, 222, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(221, 238, 222, .08) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: linear-gradient(90deg, #000, transparent 78%);
}

.hero-visual {
  position: absolute;
  inset: 0;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 60% center;
  filter: saturate(.68) contrast(1.08) brightness(.72);
  transform: scale(1.02);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: end;
  min-height: 92dvh;
  padding-top: calc(var(--header-h) + 80px);
  padding-bottom: 74px;
}

.hero-content { max-width: 790px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .73rem;
  line-height: 1;
  letter-spacing: .08em;
}

.hero-badge span {
  width: 7px;
  height: 7px;
  background: var(--accent);
  box-shadow: 0 0 14px var(--accent);
  animation: statusPulse 1.8s ease-in-out infinite;
}

@keyframes statusPulse {
  50% { opacity: .4; }
}

.hero-title {
  max-width: 760px;
  font-size: clamp(3.6rem, 7.2vw, 7.6rem);
  font-weight: 750;
  line-height: .98;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero-title span { display: inline; }

.gradient-text { color: inherit; }

.hero-lead {
  margin-top: 24px;
  color: var(--accent);
  font-size: clamp(1.3rem, 2vw, 2rem);
  font-weight: 500;
  line-height: 1.4;
}

.hero-desc {
  max-width: 620px;
  margin-top: 18px;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.9;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 48px;
  padding: 10px 22px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  border-color: var(--accent);
  color: #081008;
  background: var(--accent);
}

.btn-primary:hover { background: #b4f28d; }

.btn-outline {
  color: var(--text);
  background: rgba(8, 11, 9, .42);
}

.btn-outline:hover {
  border-color: var(--text-soft);
  background: rgba(238, 243, 237, .07);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 660px;
  margin-top: 46px;
}

.stat-item {
  position: relative;
  min-height: 108px;
  padding: 24px 20px 16px;
  border-right: 0;
  background: rgba(8, 11, 9, .52);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.stat-item:last-child { border-right: 1px solid var(--line); }

.stat-index {
  position: absolute;
  top: 8px;
  right: 10px;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: .65rem;
}

.stat-num,
.stat-suffix {
  font-family: var(--mono);
  font-size: 1.72rem;
  font-weight: 600;
  line-height: 1.1;
}

.stat-suffix { color: var(--accent); }

.stat-label {
  display: block;
  margin-top: 8px;
  color: var(--text-muted);
  font-size: .76rem;
}

.hero-console {
  align-self: center;
  width: 100%;
  margin-top: 190px;
  border: 1px solid var(--line-strong);
  background: rgba(8, 11, 9, .8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.console-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: .64rem;
}

.console-head > span { color: var(--text-muted); }

.console-head strong {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-weight: 500;
}

.console-head i {
  width: 5px;
  height: 5px;
  background: var(--accent);
}

.console-body {
  display: grid;
  gap: 10px;
  padding: 16px 14px 12px;
}

.console-body div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.console-body span {
  color: var(--text-muted);
  font-size: .72rem;
}

.console-body strong {
  font-family: var(--mono);
  font-size: .95rem;
  font-weight: 500;
}

.console-wave {
  position: relative;
  height: 42px;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(90deg, transparent 49%, rgba(159, 232, 112, .1) 50%, transparent 51%) 0 0 / 26px 100%,
    linear-gradient(rgba(159, 232, 112, .1) 1px, transparent 1px) 0 0 / 100% 10px;
}

.console-wave span {
  position: absolute;
  left: -5%;
  top: 20px;
  width: 110%;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  transform: rotate(-3deg);
}

.platform-strip {
  position: relative;
  z-index: 3;
  border-bottom: 1px solid var(--line);
  background: #0b0f0c;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.platform-grid > div {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-content: center;
  align-items: center;
  gap: 0 15px;
  min-height: 116px;
  padding: 28px 26px;
  border-left: 1px solid var(--line);
}

.platform-grid > div:last-child { border-right: 1px solid var(--line); }

.platform-grid span {
  grid-row: 1 / 3;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .72rem;
}

.platform-grid strong {
  font-size: .96rem;
  font-weight: 600;
}

.platform-grid small {
  color: var(--text-muted);
  font-size: .75rem;
}

/* Shared section styles */
.section {
  position: relative;
  z-index: 2;
  padding: 118px 0 140px;
  border-bottom: 1px solid var(--line);
}

.section-alt { background: rgba(14, 18, 15, .72); }

.section-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
  gap: 60px;
  align-items: end;
  margin-bottom: 62px;
}

.section-tag {
  display: block;
  grid-column: 1 / -1;
  margin-bottom: -38px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .06em;
}

.section-title {
  max-width: 780px;
  font-size: clamp(2.1rem, 4.2vw, 4.5rem);
  font-weight: 680;
  line-height: 1.12;
  letter-spacing: 0;
  text-wrap: balance;
}

.section-desc {
  max-width: 430px;
  color: var(--text-soft);
  font-size: .96rem;
  line-height: 1.9;
  text-wrap: pretty;
}

.cap-card p,
.scenario-card p,
.deployment-modes p { text-wrap: pretty; }

/* Capabilities */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.cap-card {
  position: relative;
  min-height: 284px;
  padding: 30px 26px;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: rgba(13, 17, 14, .72);
  overflow: hidden;
  transition: background var(--transition), transform var(--transition);
}

.cap-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

.cap-card:hover {
  z-index: 1;
  background: #151b16;
  transform: translateY(-4px);
}

.cap-card:hover::before { transform: scaleY(1); }

.cap-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 50px;
  border: 1px solid var(--line-strong);
  color: var(--accent);
}

.cap-icon svg {
  width: 25px;
  height: 25px;
}

.cap-card h3 {
  margin-bottom: 10px;
  font-size: 1.03rem;
  font-weight: 600;
}

.cap-card p {
  color: var(--text-muted);
  font-size: .82rem;
  line-height: 1.8;
}

/* Solutions */
.solution-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 28px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

.solution-tabs::-webkit-scrollbar { display: none; }

.tab-btn {
  position: relative;
  flex: 0 0 auto;
  min-width: 145px;
  padding: 16px 22px;
  border: 0;
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.tab-btn::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: transparent;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.active {
  color: var(--accent);
  background: rgba(159, 232, 112, .04);
}

.tab-btn.active::after { background: var(--accent); }

.solution-panel {
  display: none;
  grid-template-columns: minmax(280px, .78fr) minmax(0, 1.22fr);
  min-height: 510px;
  overflow: hidden;
  border-radius: 4px;
  background: var(--surface);
}

.solution-panel.active { display: grid; }

.solution-text {
  display: flex;
  flex-direction: column;
  padding: clamp(34px, 5vw, 70px);
  border-right: 1px solid var(--line);
}

.solution-text h3 {
  max-width: 400px;
  margin-bottom: 18px;
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  font-weight: 650;
  line-height: 1.24;
}

.solution-text > p {
  color: var(--text-soft);
  font-size: .9rem;
  line-height: 1.9;
}

.solution-detail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  margin-top: 20px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .72rem;
  transition: gap var(--transition), color var(--transition);
}

.solution-detail-link:hover { gap: 13px; color: var(--text); }

.solution-text ul {
  display: grid;
  gap: 13px;
  margin-top: auto;
  padding-top: 34px;
}

.solution-text li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--text-soft);
  font-size: .84rem;
}

.solution-text li::before {
  content: "+";
  color: var(--accent);
  font-family: var(--mono);
}

.solution-visual {
  position: relative;
  min-height: 420px;
  overflow: hidden;
}

.solution-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(8, 11, 9, .84), transparent 55%);
  pointer-events: none;
}

.solution-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.7) contrast(1.08);
  transition: transform 900ms cubic-bezier(.2, .7, .2, 1);
}

.solution-panel.active .solution-visual img { transform: scale(1.035); }

.solution-points {
  position: absolute;
  z-index: 2;
  left: 28px;
  right: 28px;
  bottom: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.solution-points span {
  padding: 6px 10px;
  border: 1px solid rgba(238, 243, 237, .2);
  color: var(--text);
  background: rgba(8, 11, 9, .72);
  font-size: .7rem;
}

/* Project materials */
.material-showcase {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 18px;
}

.material-feature {
  position: relative;
  min-height: 320px;
  overflow: hidden;
  border-radius: 3px;
  background: var(--surface);
}

.material-feature:first-child {
  grid-row: span 2;
  min-height: 658px;
}

.material-feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.68) brightness(.72);
  transition: transform 650ms ease, filter 650ms ease;
}

.material-feature::after {
  content: "";
  position: absolute;
  inset: 32% 0 0;
  background: linear-gradient(0deg, rgba(8, 11, 9, .98), transparent);
  pointer-events: none;
}

.material-feature > div {
  position: absolute;
  z-index: 2;
  left: 28px;
  right: 28px;
  bottom: 26px;
}

.material-feature span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .05em;
}

.material-feature h3 {
  margin: 8px 0 10px;
  font-size: clamp(1.25rem, 2vw, 2rem);
  font-weight: 620;
}

.material-feature p {
  max-width: 620px;
  color: var(--text-soft);
  font-size: .82rem;
  line-height: 1.75;
}

.material-feature:hover img {
  filter: saturate(.8) brightness(.82);
  transform: scale(1.025);
}

/* Deployment blueprint */
.deployment-grid {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
  gap: 18px;
}

.deployment-map,
.deployment-flow {
  padding: clamp(26px, 4vw, 46px);
  border-radius: 3px;
}

.deployment-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.deployment-head span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .66rem;
}

.deployment-head strong {
  font-size: 1rem;
  font-weight: 600;
}

.protocol-groups {
  display: grid;
  gap: 0;
}

.protocol-groups > div {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.protocol-groups > div:last-child { border-bottom: 0; }

.protocol-groups small {
  display: block;
  margin-bottom: 9px;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: .67rem;
}

.protocol-groups p {
  color: var(--text-soft);
  font-size: .88rem;
  line-height: 1.85;
}

.deployment-flow ol { list-style: none; }

.deployment-flow li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.deployment-flow li:last-child { border-bottom: 0; }

.deployment-flow li > b {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 500;
}

.deployment-flow li strong {
  display: block;
  margin-bottom: 3px;
  font-size: .88rem;
  font-weight: 600;
}

.deployment-flow li p {
  color: var(--text-muted);
  font-size: .76rem;
}

.deployment-modes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.deployment-modes > div {
  min-height: 210px;
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.deployment-modes span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: .68rem;
}

.deployment-modes strong {
  display: block;
  margin: 40px 0 10px;
  font-size: 1rem;
  font-weight: 600;
}

.deployment-modes p {
  color: var(--text-muted);
  font-size: .78rem;
  line-height: 1.8;
}

/* Architecture */
.arch-layers {
  display: grid;
  gap: 0;
  max-width: 1100px;
  margin: 0 auto;
}

.architecture-summary > p {
  color: var(--text-soft);
  font-size: .96rem;
  line-height: 1.9;
}

.architecture-summary ul { margin-top: 20px; border-top: 1px solid var(--line); }
.architecture-summary li { display: grid; grid-template-columns: 48px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); color: var(--text-muted); font-size: .76rem; }
.architecture-summary li span { color: var(--accent); font-family: var(--mono); }

.arch-layer {
  display: grid;
  grid-template-columns: 180px 1fr;
  align-items: stretch;
  min-height: 112px;
  border-radius: 0;
  background: rgba(15, 20, 16, .78);
  transition: border-color var(--transition), background var(--transition);
}

.arch-layer:hover {
  border-color: var(--line-strong);
  background: #141a15;
}

.layer-label {
  display: flex;
  align-items: center;
  padding: 24px 28px;
  border-right: 1px solid var(--line);
  color: var(--accent);
  font-family: var(--mono);
  font-size: .86rem;
}

.layer-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
}

.layer-items span {
  padding: 18px;
  border-right: 1px solid var(--line);
  color: var(--text-soft);
  font-size: .84rem;
  text-align: center;
}

.layer-items span:last-child { border-right: 0; }

.arch-connector {
  position: relative;
  height: 34px;
}

.arch-connector::before,
.arch-connector::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.arch-connector::before {
  top: 0;
  width: 1px;
  height: 100%;
  background: var(--line-strong);
}

.arch-connector::after {
  bottom: -1px;
  width: 6px;
  height: 6px;
  border-right: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  transform: translateX(-50%) rotate(45deg);
}

.connector-line { display: none; }

/* Scenarios */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.scenario-card {
  min-height: 230px;
  padding: 28px;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  transition: background var(--transition);
}

.scenario-card:hover { background: rgba(159, 232, 112, .035); }

.scenario-num {
  margin-bottom: 52px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .76rem;
}

.scenario-card h3 {
  margin-bottom: 12px;
  font-size: 1.18rem;
  font-weight: 600;
}

.scenario-card p {
  color: var(--text-muted);
  font-size: .84rem;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr);
  gap: clamp(50px, 8vw, 120px);
  align-items: start;
}

.about-content .section-tag { margin-bottom: 26px; }

.about-content .section-title { margin-bottom: 36px; }

.about-content > p {
  max-width: 720px;
  margin-bottom: 18px;
  color: var(--text-soft);
  font-size: .94rem;
  line-height: 2;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 44px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.value-item {
  min-height: 130px;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.value-item strong {
  display: block;
  margin-bottom: 12px;
  color: var(--accent);
  font-size: .75rem;
  font-weight: 500;
}

.value-item span {
  color: var(--text-soft);
  font-size: .8rem;
}

.about-visual {
  position: sticky;
  top: calc(var(--header-h) + 34px);
  padding: 38px;
  border-color: var(--line-strong);
  border-radius: 3px;
  background:
    linear-gradient(rgba(159, 232, 112, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 232, 112, .04) 1px, transparent 1px),
    var(--surface);
  background-size: 32px 32px;
}

.scope-list h4 {
  margin-bottom: 24px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 500;
}

.scope-list ul { counter-reset: scope; }

.scope-list li {
  counter-increment: scope;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--text-soft);
  font-size: .84rem;
}

.scope-list li::before {
  content: "0" counter(scope);
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: .65rem;
}

/* Partners and team */
.partner-matrix {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.partner-matrix > div {
  min-height: 175px;
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(9, 13, 10, .5);
  transition: background var(--transition), border-color var(--transition);
}

.partner-matrix > div:hover { border-color: var(--line-strong); background: rgba(159,232,112,.035); }
.partner-matrix span { color: var(--accent); font-family: var(--mono); font-size: .67rem; }
.partner-matrix strong { display: block; margin-top: 48px; color: var(--text-soft); font-size: .92rem; font-weight: 600; }
.partner-matrix small { display: block; margin-top: 8px; color: var(--text-muted); font-family: var(--mono); font-size: .62rem; }

.team-structure-dark { margin-top: 34px; padding-top: 28px; border-top: 1px solid var(--line-strong); }
.team-structure-dark h4 { margin-bottom: 14px; color: var(--accent); font-family: var(--mono); font-size: .75rem; font-weight: 500; }
.team-structure-dark > div { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding: 13px 0; border-top: 1px solid var(--line); }
.team-structure-dark > div > span { color: var(--text-muted); font-family: var(--mono); font-size: .64rem; }
.team-structure-dark p { color: var(--text-muted); font-size: .76rem; line-height: 1.7; }
.team-structure-dark p strong { display: block; color: var(--text-soft); font-size: .8rem; }

/* Solution detail page */
.detail-page-dark .header { background: rgba(6, 9, 7, .96); }
.dark-detail-hero { position: relative; min-height: min(780px, 92dvh); display: flex; align-items: flex-end; overflow: hidden; }
.dark-detail-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,9,7,.94), rgba(6,9,7,.5) 66%, rgba(6,9,7,.22)), linear-gradient(0deg, rgba(6,9,7,.75), transparent 58%); }
.dark-detail-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: saturate(.68) contrast(1.08); }
.dark-detail-hero-content { position: relative; z-index: 1; padding-bottom: clamp(68px, 10vh, 108px); }
.dark-detail-hero-content > span,
.dark-detail-media > span { color: var(--accent); font-family: var(--mono); font-size: .7rem; letter-spacing: .06em; }
.dark-detail-hero-content h1 { max-width: 900px; margin: 18px 0 22px; font-size: clamp(3rem, 6.8vw, 6.6rem); line-height: 1.02; text-wrap: balance; }
.dark-detail-hero-content p { max-width: 650px; margin-bottom: 30px; color: var(--text-soft); font-size: 1rem; line-height: 1.9; }

.dark-detail-nav { position: sticky; top: var(--header-h); z-index: 50; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(8,11,9,.94); backdrop-filter: blur(14px); }
.dark-detail-nav .container { display: grid; grid-template-columns: repeat(4, 1fr); }
.dark-detail-nav a { padding: 20px; border-left: 1px solid var(--line); color: var(--text-soft); font-size: .8rem; text-align: center; }
.dark-detail-nav a:last-child { border-right: 1px solid var(--line); }
.dark-detail-nav span { margin-right: 8px; color: var(--accent); font-family: var(--mono); font-size: .66rem; }

.dark-overview-band { border-bottom: 1px solid var(--line); background: #0b0f0c; }
.dark-overview-band .container { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); border-left: 1px solid var(--line); }
.dark-overview-band .container > div { min-height: 112px; padding: 24px; border-right: 1px solid var(--line); }
.dark-overview-band span,
.dark-overview-band strong { display: block; }
.dark-overview-band span { margin-bottom: 14px; color: var(--accent); font-family: var(--mono); font-size: .65rem; }
.dark-overview-band strong { color: var(--text-soft); font-size: .8rem; font-weight: 500; line-height: 1.7; }

.dark-detail-solution { scroll-margin-top: calc(var(--header-h) + 62px); }
.dark-detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(48px, 7vw, 100px); align-items: start; }
.dark-detail-grid.reverse .dark-detail-media { order: 2; }
.dark-detail-media { position: sticky; top: calc(var(--header-h) + 94px); overflow: hidden; border-radius: 3px; }
.dark-detail-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; filter: saturate(.65) contrast(1.08); }
.dark-detail-media > span { display: block; padding: 17px 20px; border-top: 1px solid var(--line); background: var(--surface); }
.dark-detail-copy .section-tag { margin: 0 0 14px; }
.dark-detail-copy h2 { margin-bottom: 20px; font-size: clamp(2rem, 3.8vw, 4rem); font-weight: 650; line-height: 1.12; text-wrap: balance; }
.dark-detail-lead { color: var(--text-soft); font-size: .94rem; line-height: 1.9; }
.dark-detail-facts { margin: 34px 0; border-top: 1px solid var(--line); }
.dark-detail-facts > div { display: grid; grid-template-columns: 110px 1fr; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.dark-detail-facts strong { color: var(--text); font-size: .82rem; font-weight: 600; }
.dark-detail-facts p { color: var(--text-muted); font-size: .78rem; }
.dark-deliverables { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.dark-deliverables li { position: relative; min-height: 78px; padding: 20px 16px 18px 38px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--text-muted); font-size: .77rem; }
.dark-deliverables li::before { content: "+"; position: absolute; left: 17px; top: 19px; color: var(--accent); font-family: var(--mono); }

.dark-solution-deep-dive { position: relative; z-index: 2; padding: 24px 0 118px; border-bottom: 1px solid var(--line); }
.dark-subhead { display: grid; grid-template-columns: minmax(0,.85fr) minmax(320px,1.15fr); gap: 22px 70px; align-items: end; margin-bottom: 42px; }
.dark-subhead > span { grid-column: 1 / -1; color: var(--accent); font-family: var(--mono); font-size: .67rem; }
.dark-subhead h3 { font-size: clamp(1.8rem, 3.4vw, 3.4rem); font-weight: 620; line-height: 1.16; text-wrap: balance; }
.dark-subhead p { color: var(--text-soft); font-size: .86rem; line-height: 1.9; }

.dark-challenge-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.dark-challenge-grid article { min-height: 190px; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(9,13,10,.42); }
.dark-challenge-grid article > span { color: var(--accent); font-family: var(--mono); font-size: .64rem; }
.dark-challenge-grid h4 { margin: 42px 0 10px; font-size: .94rem; font-weight: 600; }
.dark-challenge-grid p { color: var(--text-muted); font-size: .75rem; line-height: 1.75; }

.dark-solution-chain { display: grid; grid-template-columns: minmax(0,1fr) 24px minmax(0,1fr) 24px minmax(0,1fr) 24px minmax(0,1fr) 24px minmax(0,1fr); align-items: center; margin-top: 42px; }
.dark-solution-chain > div { min-height: 132px; display: grid; align-content: center; padding: 18px; border: 1px solid var(--line); background: rgba(15,20,16,.82); text-align: center; }
.dark-solution-chain span,
.dark-solution-chain strong,
.dark-solution-chain small { display: block; }
.dark-solution-chain span { margin-bottom: 10px; color: var(--accent); font-family: var(--mono); font-size: .62rem; }
.dark-solution-chain strong { font-size: .82rem; font-weight: 600; }
.dark-solution-chain small { margin-top: 7px; color: var(--text-muted); font-size: .63rem; line-height: 1.5; }
.dark-solution-chain > i { position: relative; height: 1px; background: var(--accent); opacity: .55; }
.dark-solution-chain > i::after { content: ""; position: absolute; right: 0; top: -3px; width: 6px; height: 6px; border-top: 1px solid var(--accent); border-right: 1px solid var(--accent); transform: rotate(45deg); }

.dark-phases { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); margin-top: 42px; border-top: 1px solid var(--line); }
.dark-phases > div { padding: 24px 24px 4px 0; }
.dark-phases span,
.dark-phases strong { display: block; }
.dark-phases span { color: var(--accent); font-family: var(--mono); font-size: .62rem; }
.dark-phases strong { margin: 12px 0 7px; font-size: .84rem; }
.dark-phases p { color: var(--text-muted); font-size: .72rem; line-height: 1.7; }

.dark-project-boundary { background: #0c140d; }
.dark-boundary-head { display: grid; grid-template-columns: minmax(0,.9fr) minmax(320px,1.1fr); gap: 20px 70px; align-items: end; margin-bottom: 46px; }
.dark-boundary-head > span { grid-column: 1 / -1; color: var(--accent); font-family: var(--mono); font-size: .66rem; }
.dark-boundary-head h2 { font-size: clamp(2rem,3.8vw,3.8rem); font-weight: 630; line-height: 1.16; text-wrap: balance; }
.dark-boundary-head p { color: var(--text-soft); line-height: 1.9; }
.dark-boundary-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.dark-boundary-grid article { min-height: 300px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.dark-boundary-grid article > span { color: var(--accent); font-family: var(--mono); font-size: .65rem; }
.dark-boundary-grid h3 { margin: 44px 0 18px; font-size: 1.06rem; }
.dark-boundary-grid ul { display: grid; gap: 10px; }
.dark-boundary-grid li { position: relative; padding-left: 18px; color: var(--text-muted); font-size: .76rem; }
.dark-boundary-grid li::before { content: "+"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }

.dark-detail-cta { padding: 76px 0 88px; border-bottom: 1px solid var(--line); background: #0d160e; }
.dark-detail-cta .container { display: flex; align-items: center; justify-content: space-between; gap: 42px; }
.dark-detail-cta span { color: var(--accent); font-family: var(--mono); font-size: .68rem; }
.dark-detail-cta h2 { margin: 8px 0; font-size: clamp(1.9rem, 3.5vw, 3.2rem); line-height: 1.2; }
.dark-detail-cta p { color: var(--text-muted); }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.contact-card {
  min-height: 245px;
  padding: 30px 26px;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: rgba(11, 15, 12, .7);
}

.contact-icon {
  width: 36px;
  height: 36px;
  margin-bottom: 54px;
  color: var(--accent);
}

.contact-icon svg {
  width: 100%;
  height: 100%;
  stroke-width: 1.3;
}

.contact-card h3 {
  margin-bottom: 12px;
  font-size: .96rem;
  font-weight: 600;
}

.contact-card p {
  color: var(--text-muted);
  font-size: .78rem;
  overflow-wrap: anywhere;
}

.contact-card a {
  color: var(--text-soft);
  transition: color var(--transition);
}

.contact-card a:hover { color: var(--accent); }

/* Footer */
.footer {
  position: relative;
  z-index: 2;
  padding: 34px 0;
  background: #060806;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .84rem;
  font-weight: 600;
}

.footer-brand img {
  width: 26px;
  height: 26px;
}

.footer-brand > span {
  display: grid;
  gap: 3px;
}

.footer-brand strong {
  font-size: .84rem;
  font-weight: 600;
}

.footer-brand small {
  color: var(--text-muted);
  font-size: .62rem;
  font-weight: 500;
}

.footer-copy {
  color: var(--text-muted);
  font-size: .72rem;
}

.footer-meta {
  display: grid;
  justify-items: end;
  gap: 6px;
  text-align: right;
}

.footer-icp {
  color: var(--text-muted);
  font-size: .72rem;
  line-height: 1.5;
}

.footer-icp:hover {
  color: var(--accent);
}

.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 80;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  color: var(--accent);
  background: rgba(8, 11, 9, .9);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
}

.back-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-top:hover {
  color: #081008;
  background: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease var(--delay, 0ms), transform 700ms ease var(--delay, 0ms);
}

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

@media (max-width: 1100px) {
  .nav { gap: 18px; }
  .nav a { font-size: .82rem; }
  .hero-inner { grid-template-columns: minmax(0, 1fr) 260px; }
  .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  :root { --header-h: 66px; }

  .container { width: min(100% - 36px, var(--container)); }

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

  .nav {
    position: fixed;
    top: calc(var(--header-h) + 12px);
    right: 14px;
    left: auto;
    z-index: 101;
    width: min(360px, calc(100vw - 28px));
    max-height: calc(100dvh - var(--header-h) - 28px);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 4px;
    padding: 10px;
    background:
      linear-gradient(135deg, rgba(159, 232, 112, 0.06), transparent 42%),
      rgba(7, 12, 9, 0.96);
    border: 1px solid rgba(159, 232, 112, 0.2);
    box-shadow: 0 26px 80px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px) scale(0.98);
    transform-origin: top right;
    transition: opacity 220ms ease, transform 220ms ease, visibility 220ms ease;
  }

  .nav.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .nav a {
    width: 100%;
    padding: 14px 16px;
    border-bottom: 0;
    border-radius: 6px;
    font-size: 1rem;
    color: var(--muted);
  }

  .nav a:not(.nav-contact)::after { display: none; }

  .nav a:hover,
  .nav a.active {
    background: rgba(159, 232, 112, 0.08);
    color: var(--text);
  }

  .nav .nav-contact {
    width: 100%;
    min-width: 0;
    margin-top: 6px;
    padding: 14px 16px;
    justify-content: center;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    align-items: end;
    padding-top: calc(var(--header-h) + 70px);
    padding-bottom: 44px;
  }

  .hero-console {
    display: none;
  }

  .hero-title { font-size: clamp(3.5rem, 13vw, 6rem); }

  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid > div:nth-child(3) { border-top: 1px solid var(--line); }
  .platform-grid > div:nth-child(4) { border-top: 1px solid var(--line); }

  .section { padding: 90px 0 108px; }

  .section-header {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 46px;
  }

  .section-tag {
    grid-column: auto;
    margin-bottom: 4px;
  }

  .section-desc { max-width: 620px; }

  .solution-panel.active { grid-template-columns: 1fr; }
  .solution-text { min-height: 420px; border-right: 0; border-bottom: 1px solid var(--line); }

  .material-showcase { grid-template-columns: 1fr 1fr; }
  .material-feature:first-child {
    grid-column: 1 / -1;
    grid-row: auto;
    min-height: 520px;
  }

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

  .scenario-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

  .about-visual { position: static; }
  .dark-detail-grid { grid-template-columns: 1fr; }
  .dark-detail-grid.reverse .dark-detail-media { order: 0; }
  .dark-detail-media { position: static; }
  .dark-overview-band .container { grid-template-columns: repeat(2,1fr); }
  .dark-subhead,
  .dark-boundary-head { grid-template-columns: 1fr; gap: 16px; }
  .dark-subhead > span,
  .dark-boundary-head > span { grid-column: auto; }
  .dark-challenge-grid { grid-template-columns: repeat(2,1fr); }
  .dark-phases { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 620px) {
  .container { width: min(100% - 28px, var(--container)); }

  .logo {
    min-width: 0;
    gap: 9px;
  }

  .logo img {
    width: 31px;
    height: 31px;
  }

  .logo-copy strong { font-size: .84rem; }
  .logo-copy small { font-size: .46rem; }

  .hero {
    min-height: 760px;
  }

  .hero::before {
    background:
      linear-gradient(90deg, rgba(6, 9, 7, .92), rgba(6, 9, 7, .45)),
      linear-gradient(0deg, #080b09 0%, rgba(8, 11, 9, .28) 65%);
  }

  .hero-visual img { object-position: 58% center; }

  .hero-inner {
    min-height: 760px;
    padding-top: 122px;
    padding-bottom: 32px;
  }

  .hero-badge {
    margin-bottom: 20px;
    font-size: .61rem;
  }

  .hero-title {
    max-width: 330px;
    font-size: clamp(3.2rem, 17vw, 4.6rem);
    line-height: 1.02;
  }

  .hero-title span {
    display: block;
    white-space: nowrap;
  }

  .hero-lead {
    max-width: 340px;
    margin-top: 18px;
    font-size: 1.18rem;
  }

  .hero-desc {
    margin-top: 14px;
    font-size: .86rem;
    line-height: 1.8;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 24px;
  }

  .btn {
    min-height: 44px;
    padding-inline: 12px;
    gap: 8px;
    font-size: .78rem;
  }

  .hero-stats { margin-top: 28px; }

  .stat-item {
    min-height: 86px;
    padding: 20px 10px 10px;
  }

  .stat-num,
  .stat-suffix { font-size: 1.25rem; }

  .stat-label { font-size: .62rem; }

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

  .platform-grid > div {
    min-height: 88px;
    padding: 20px;
    border-right: 1px solid var(--line);
    border-top: 1px solid var(--line);
  }

  .platform-grid strong,
  .platform-grid small { align-self: center; }

  .platform-grid > div:first-child { border-top: 0; }

  .section { padding: 76px 0 90px; }

  .section-title {
    font-size: clamp(2rem, 11vw, 3.2rem);
  }

  .cap-grid,
  .scenario-grid,
  .contact-grid { grid-template-columns: 1fr; }
  .partner-matrix { grid-template-columns: 1fr; }

  .cap-card { min-height: 240px; }
  .cap-icon { margin-bottom: 38px; }

  .solution-tabs {
    margin-right: -14px;
    padding-right: 14px;
  }

  .tab-btn {
    min-width: 112px;
    padding: 14px 12px;
    font-size: .78rem;
  }

  .solution-panel { min-height: 0; }

  .solution-text {
    min-height: 390px;
    padding: 30px 24px;
  }

  .solution-text h3 { font-size: 1.65rem; }

  .solution-visual { min-height: 300px; }

  .solution-points {
    left: 18px;
    right: 18px;
    bottom: 18px;
  }

  .material-showcase { grid-template-columns: 1fr; }

  .material-feature,
  .material-feature:first-child {
    grid-column: auto;
    min-height: 390px;
  }

  .material-feature > div {
    left: 20px;
    right: 20px;
    bottom: 20px;
  }

  .deployment-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .deployment-modes { grid-template-columns: 1fr; }
  .deployment-modes > div { min-height: 0; }
  .deployment-modes strong { margin-top: 24px; }
  .dark-detail-hero { min-height: 680px; }
  .dark-detail-hero-content h1 {
    font-size: clamp(2.5rem, 12.5vw, 3.4rem);
    line-height: 1.08;
  }
  .dark-detail-nav { position: static; overflow-x: auto; }
  .dark-detail-nav .container { width: max-content; min-width: 100%; grid-template-columns: repeat(4, minmax(128px, 1fr)); }
  .dark-detail-nav a { white-space: nowrap; }
  .dark-detail-solution { scroll-margin-top: var(--header-h); }
  .dark-detail-facts > div { grid-template-columns: 1fr; gap: 5px; }
  .dark-deliverables { grid-template-columns: 1fr; }
  .dark-detail-cta .container { align-items: flex-start; flex-direction: column; }
  .dark-solution-chain { grid-template-columns: 1fr; gap: 0; }
  .dark-solution-chain > div { min-height: 108px; }
  .dark-solution-chain > i { width: 1px; height: 22px; margin: 0 auto; }
  .dark-solution-chain > i::after { right: -3px; top: auto; bottom: 0; transform: rotate(135deg); }
  .dark-boundary-grid { grid-template-columns: 1fr; }
  .dark-overview-band .container,
  .dark-challenge-grid,
  .dark-phases { grid-template-columns: 1fr; }
  .dark-overview-band .container > div { min-height: 94px; }
  .dark-challenge-grid article { min-height: 160px; }
  .dark-challenge-grid h4 { margin-top: 28px; }

  .arch-layer { grid-template-columns: 1fr; }

  .layer-label {
    padding: 15px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .layer-items span {
    border-bottom: 1px solid var(--line);
    font-size: .76rem;
  }

  .layer-items span:nth-child(2) { border-right: 0; }
  .layer-items span:nth-last-child(-n + 2) { border-bottom: 0; }

  .about-values { grid-template-columns: 1fr; }

  .value-item { min-height: 100px; }

  .about-visual { padding: 26px 22px; }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .footer-meta {
    justify-items: start;
    text-align: left;
  }

  .back-top {
    right: 14px;
    bottom: 14px;
  }
}

@media (max-width: 620px) and (max-height: 700px) {
  .hero,
  .hero-inner {
    min-height: 540px;
  }

  .hero-inner {
    padding-top: 92px;
    padding-bottom: 22px;
  }

  .hero-badge {
    margin-bottom: 12px;
  }

  .hero-title {
    font-size: clamp(2.65rem, 14.5vw, 3.1rem);
  }

  .hero-lead {
    margin-top: 12px;
    font-size: 1rem;
  }

  .hero-desc {
    margin-top: 10px;
    font-size: .76rem;
    line-height: 1.65;
  }

  .hero-actions {
    margin-top: 16px;
  }

  .hero-stats {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

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