:root {
  --navy-950: #050b13;
  --navy-900: #07111f;
  --navy-850: #0a1726;
  --navy-800: #0d1b2a;
  --navy-700: #14283b;
  --mist-50: #f4f7f8;
  --mist-100: #e9eff1;
  --mist-200: #d7e1e4;
  --mist-400: #93a5ac;
  --mist-500: #71858d;
  --ink: #10202a;
  --cyan: #19e6e6;
  --cyan-soft: #7ff5f0;
  --line-dark: rgba(231, 242, 244, 0.14);
  --line-light: rgba(11, 33, 44, 0.14);
  --font-mono: ui-monospace, "SFMono-Regular", "Cascadia Code", "Noto Sans Mono CJK SC", "Microsoft YaHei", monospace;
  --font-sans: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --shell: min(1180px, calc(100% - 48px));
  --header-height: 78px;
  --radius: 2px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  margin: 0;
  background: var(--navy-900);
  color: var(--mist-50);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
}

img,
svg {
  display: block;
}

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

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--navy-950);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform 180ms 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;
  height: var(--header-height);
  border-bottom: 1px solid var(--line-dark);
  background: rgba(7, 17, 31, 0.76);
  backdrop-filter: blur(18px);
  transition: background 240ms ease, box-shadow 240ms ease;
}

.site-header.is-scrolled {
  background: rgba(5, 11, 19, 0.94);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.2);
}

.header-inner {
  width: min(1320px, calc(100% - 48px));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  min-width: 220px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3px;
  transform: rotate(45deg);
}

.brand-mark span {
  display: block;
  border: 1px solid rgba(25, 230, 230, 0.64);
}

.brand-mark span:nth-child(1),
.brand-mark span:nth-child(4) {
  background: var(--cyan);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-copy strong {
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.2em;
}

.brand-copy small {
  margin-top: 6px;
  color: var(--mist-400);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.24em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.site-nav a {
  position: relative;
  color: var(--mist-200);
  transition: color 180ms 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 220ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--cyan-soft);
}

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

.nav-cta {
  padding: 11px 18px;
  border: 1px solid rgba(25, 230, 230, 0.58);
  color: var(--cyan) !important;
  transition: background 180ms ease, color 180ms ease !important;
}

.nav-cta:hover {
  background: var(--cyan);
  color: var(--navy-950) !important;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 12px;
  border: 0;
  background: transparent;
  color: var(--mist-50);
  cursor: pointer;
}

.nav-toggle-label {
  font-family: var(--font-mono);
  font-size: 12px;
}

.nav-toggle-icon {
  width: 28px;
  height: 18px;
  position: relative;
}

.nav-toggle-icon i {
  position: absolute;
  right: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform 220ms ease, top 220ms ease;
}

.nav-toggle-icon i:first-child { top: 4px; }
.nav-toggle-icon i:last-child { top: 13px; width: 68%; }

.hero {
  min-height: 780px;
  position: relative;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 82px) 0 96px;
  overflow: hidden;
  isolation: isolate;
  background:
    linear-gradient(115deg, rgba(5, 11, 19, 0.1), rgba(8, 22, 36, 0.78)),
    var(--navy-900);
}

.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -12vw;
  bottom: -32vw;
  width: 68vw;
  height: 68vw;
  border: 1px solid rgba(25, 230, 230, 0.09);
  border-radius: 50%;
  box-shadow: 0 0 0 7vw rgba(25, 230, 230, 0.016), 0 0 0 14vw rgba(25, 230, 230, 0.012);
}

.hero-grid,
.about-grid,
.contact-grid {
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: 0.34;
  background-image: radial-gradient(circle, rgba(157, 196, 204, 0.38) 0.7px, transparent 0.8px);
  background-size: 18px 18px;
  mask-image: linear-gradient(90deg, transparent 5%, #000 48%, transparent 96%);
}

.hero-grid::before,
.hero-grid::after {
  content: "";
  position: absolute;
  background: rgba(25, 230, 230, 0.2);
}

.hero-grid::before {
  top: 24%;
  right: 0;
  left: 0;
  height: 1px;
}

.hero-grid::after {
  top: 0;
  bottom: 0;
  left: 62%;
  width: 1px;
}

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

.hero-orb-one {
  top: 18%;
  right: 9%;
  width: 300px;
  height: 300px;
  background: rgba(25, 230, 230, 0.08);
  filter: blur(70px);
}

.hero-orb-two {
  bottom: 4%;
  left: -5%;
  width: 240px;
  height: 240px;
  background: rgba(42, 103, 156, 0.16);
  filter: blur(80px);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  align-items: center;
  gap: clamp(48px, 7vw, 110px);
}

.eyebrow,
.section-index {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 24px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.eyebrow span + span::before {
  content: "/";
  margin-right: 12px;
  color: var(--mist-500);
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(46px, 5.3vw, 80px);
  font-weight: 640;
  letter-spacing: -0.055em;
  line-height: 1.08;
}

.title-line {
  display: block;
}

.title-accent {
  position: relative;
  z-index: 0;
  margin-top: 8px;
  color: var(--cyan-soft);
  text-shadow: 0 0 34px rgba(25, 230, 230, 0.14);
}

.title-accent::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 18%;
  opacity: 0.85;
  background: var(--cyan);
  transform: scaleX(0.06);
  transform-origin: left;
  animation: headline-scan 5.8s cubic-bezier(.72, 0, .2, 1) infinite;
}

@keyframes headline-scan {
  0%, 18% { transform: scaleX(0.06); opacity: 0.85; }
  48%, 72% { transform: scaleX(1); opacity: 0.12; }
  100% { transform: scaleX(0.06); opacity: 0.85; }
}

.hero-lead {
  max-width: 650px;
  margin: 30px 0 0;
  color: #adc0c6;
  font-size: 17px;
  line-height: 1.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  padding: 13px 22px;
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: color 200ms ease, background 200ms ease, border-color 200ms ease, transform 200ms ease;
}

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

.button svg {
  width: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.button-primary {
  background: var(--cyan);
  color: var(--navy-950);
  box-shadow: 0 14px 40px rgba(25, 230, 230, 0.1);
}

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

.button-ghost {
  border-color: rgba(221, 237, 240, 0.2);
  color: var(--mist-100);
}

.button-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan-soft);
}

.hero-principles {
  display: flex;
  gap: clamp(20px, 3vw, 44px);
  margin: 50px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-dark);
}

.hero-principles div {
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: 8px;
}

.hero-principles dt,
.hero-principles dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
}

.hero-principles dt { color: var(--cyan); }
.hero-principles dd { color: var(--mist-400); }

.hero-system {
  position: relative;
}

.system-frame {
  position: relative;
  border: 1px solid rgba(136, 177, 185, 0.26);
  background: linear-gradient(155deg, rgba(17, 40, 58, 0.88), rgba(6, 16, 28, 0.76));
  box-shadow: 0 36px 90px rgba(0, 0, 0, 0.34), inset 0 0 60px rgba(25, 230, 230, 0.025);
  transform: perspective(1400px) rotateY(-3deg) rotateX(1deg);
}

.system-frame::before,
.system-frame::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  pointer-events: none;
}

.system-frame::before {
  top: -5px;
  left: -5px;
  border-top: 1px solid var(--cyan);
  border-left: 1px solid var(--cyan);
}

.system-frame::after {
  right: -5px;
  bottom: -5px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
}

.system-topbar,
.system-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 18px;
  color: var(--mist-400);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.system-topbar {
  border-bottom: 1px solid var(--line-dark);
}

.system-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cyan-soft);
}

.system-status i,
.system-footer i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.system-canvas {
  min-height: 430px;
  position: relative;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(173, 204, 209, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(173, 204, 209, 0.045) 1px, transparent 1px);
  background-size: 32px 32px;
}

.system-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  fill: none;
  stroke: rgba(25, 230, 230, 0.34);
  stroke-width: 1;
  stroke-dasharray: 5 6;
}

.system-lines path {
  animation: dash-flow 8s linear infinite;
}

@keyframes dash-flow {
  to { stroke-dashoffset: -110; }
}

.orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(25, 230, 230, 0.12);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-one { width: 54%; aspect-ratio: 1; }
.orbit-two { width: 78%; aspect-ratio: 1; }

.system-core {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  width: 126px;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(25, 230, 230, 0.72);
  border-radius: 50%;
  background: rgba(7, 21, 33, 0.94);
  box-shadow: 0 0 52px rgba(25, 230, 230, 0.13), inset 0 0 26px rgba(25, 230, 230, 0.08);
  transform: translate(-50%, -50%);
}

.core-pulse {
  position: absolute;
  inset: -10px;
  border: 1px solid rgba(25, 230, 230, 0.18);
  border-radius: 50%;
  animation: core-pulse 3.6s ease-out infinite;
}

@keyframes core-pulse {
  0% { transform: scale(0.88); opacity: 0; }
  30% { opacity: 1; }
  100% { transform: scale(1.38); opacity: 0; }
}

.system-core strong,
.system-node b {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.system-core strong { font-size: 15px; }
.system-core small,
.system-node small { color: var(--mist-500); font-size: 10px; }
.system-core small { margin-top: 5px; }

.system-node {
  position: absolute;
  z-index: 2;
  width: 104px;
  padding: 12px 13px;
  border-left: 2px solid var(--cyan);
  background: rgba(10, 27, 42, 0.9);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.18);
}

.system-node b,
.system-node small { display: block; }
.system-node b { font-size: 12px; }
.system-node small { margin-top: 3px; }
.node-one { top: 10%; left: 5%; }
.node-two { top: 10%; right: 5%; }
.node-three { bottom: 10%; left: 5%; }
.node-four { right: 5%; bottom: 10%; }

.system-footer {
  justify-content: flex-start;
  gap: 26px;
  border-top: 1px solid var(--line-dark);
}

.system-footer span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.system-stamp {
  position: absolute;
  right: -28px;
  bottom: -36px;
  width: 92px;
  height: 92px;
  display: grid;
  place-items: center;
  padding: 16px;
  border: 1px solid rgba(25, 230, 230, 0.5);
  background: var(--navy-950);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  transform: rotate(6deg);
}

.system-stamp i {
  width: 100%;
  height: 1px;
  background: rgba(25, 230, 230, 0.45);
}

.intro-strip {
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  background: var(--navy-950);
}

.strip-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(25px, 5vw, 70px);
}

.strip-inner p {
  margin: 0;
  color: var(--mist-400);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.strip-inner i {
  width: 4px;
  height: 4px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.section {
  position: relative;
  padding: 126px 0;
}

.capabilities,
.process-section {
  background: var(--mist-50);
  color: var(--ink);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  align-items: end;
  gap: 80px;
  margin-bottom: 64px;
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line-light);
}

.section-index {
  margin-bottom: 18px;
  color: #087f86;
}

.section h2,
.contact-section h2 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 58px);
  font-weight: 610;
  letter-spacing: -0.045em;
  line-height: 1.2;
}

.section-head > p {
  max-width: 470px;
  margin: 0;
  color: #52666e;
  font-size: 15px;
  line-height: 1.9;
}

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

.capability-card {
  min-height: 450px;
  position: relative;
  padding: 30px 26px;
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  transition: color 260ms ease, background 260ms ease, transform 260ms ease;
}

.capability-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 260ms ease;
}

.capability-card:hover {
  z-index: 2;
  background: var(--navy-900);
  color: var(--mist-50);
  transform: translateY(-8px);
}

.capability-card:hover::after { transform: scaleX(1); }

.card-number {
  color: #778b92;
  font-family: var(--font-mono);
  font-size: 11px;
}

.card-icon {
  width: 54px;
  height: 54px;
  position: relative;
  margin: 42px 0 32px;
  border: 1px solid #759098;
}

.card-icon span {
  position: absolute;
  display: block;
  height: 1px;
  background: #0f8f96;
  transform-origin: left;
}

.card-icon span:nth-child(1) { width: 28px; top: 13px; left: 12px; transform: rotate(32deg); }
.card-icon span:nth-child(2) { width: 28px; top: 27px; left: 12px; transform: rotate(-32deg); }
.card-icon span:nth-child(3) { width: 6px; height: 6px; top: 24px; left: 23px; border-radius: 50%; }
.icon-channel span:nth-child(1) { width: 12px; height: 12px; top: 9px; left: 9px; background: transparent; border: 1px solid #0f8f96; transform: none; }
.icon-channel span:nth-child(2) { width: 12px; height: 12px; top: 31px; left: 31px; background: transparent; border: 1px solid #0f8f96; transform: none; }
.icon-channel span:nth-child(3) { width: 30px; height: 1px; top: 27px; left: 12px; border-radius: 0; transform: rotate(45deg); }
.icon-content span:nth-child(1) { width: 28px; top: 14px; left: 12px; transform: none; }
.icon-content span:nth-child(2) { width: 20px; top: 26px; left: 12px; transform: none; }
.icon-content span:nth-child(3) { width: 12px; height: 12px; top: 34px; left: 28px; background: transparent; border: 1px solid #0f8f96; border-radius: 50%; }
.icon-user span:nth-child(1) { width: 12px; height: 12px; top: 10px; left: 20px; background: transparent; border: 1px solid #0f8f96; border-radius: 50%; transform: none; }
.icon-user span:nth-child(2) { width: 28px; height: 14px; top: 31px; left: 12px; background: transparent; border: 1px solid #0f8f96; border-radius: 22px 22px 0 0; transform: none; }
.icon-user span:nth-child(3) { display: none; }

.capability-card:hover .card-icon { border-color: rgba(127, 245, 240, 0.62); }
.capability-card:hover .card-icon span { background-color: var(--cyan); border-color: var(--cyan); }

.capability-card h3 {
  margin: 0 0 16px;
  font-size: 21px;
  font-weight: 650;
}

.capability-card p {
  margin: 0;
  color: #63757c;
  font-size: 14px;
  line-height: 1.85;
  transition: color 260ms ease;
}

.capability-card:hover p { color: #9eb0b6; }

.capability-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.capability-card li {
  padding: 5px 8px;
  border: 1px solid rgba(70, 99, 108, 0.22);
  color: #536970;
  font-family: var(--font-mono);
  font-size: 10px;
  transition: color 260ms ease, border-color 260ms ease;
}

.capability-card:hover li {
  border-color: rgba(25, 230, 230, 0.22);
  color: var(--cyan-soft);
}

.solution-section {
  overflow: hidden;
  background: var(--navy-850);
}

.solution-section::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -180px;
  width: 560px;
  height: 560px;
  border: 1px solid rgba(25, 230, 230, 0.08);
  border-radius: 50%;
  box-shadow: 0 0 0 70px rgba(25, 230, 230, 0.012), 0 0 0 140px rgba(25, 230, 230, 0.009);
}

.solution-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  align-items: center;
  gap: clamp(60px, 9vw, 140px);
}

.solution-copy {
  position: sticky;
  top: 130px;
}

.solution-copy .section-index,
.about-copy .section-index,
.contact-section .section-index {
  color: var(--cyan);
}

.solution-lead {
  margin: 28px 0 0;
  color: #96aab1;
  font-size: 15px;
  line-height: 1.95;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  padding-bottom: 5px;
  border-bottom: 1px solid rgba(25, 230, 230, 0.44);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}

.text-link span { transition: transform 180ms ease; }
.text-link:hover span { transform: translate(3px, -3px); }

.solution-stack {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.solution-layer {
  min-height: 146px;
  position: relative;
  display: grid;
  grid-template-columns: 0.75fr 1fr;
  align-items: center;
  gap: 24px;
  margin-top: -1px;
  padding: 30px 76px 30px 32px;
  border: 1px solid rgba(176, 207, 212, 0.18);
  background: rgba(11, 30, 46, 0.86);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
  transition: border-color 220ms ease, background 220ms ease, transform 220ms ease;
}

.solution-layer:nth-child(2) { margin-left: 24px; }
.solution-layer:nth-child(3) { margin-left: 48px; }
.solution-layer:nth-child(4) { margin-left: 72px; }

.solution-layer:hover {
  z-index: 2;
  border-color: rgba(25, 230, 230, 0.52);
  background: rgba(14, 39, 57, 0.96);
  transform: translateX(-8px);
}

.layer-label span,
.layer-label strong {
  display: block;
}

.layer-label span {
  margin-bottom: 7px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.layer-label strong {
  font-size: 23px;
  font-weight: 620;
}

.solution-layer p {
  margin: 0;
  color: #8fa4ab;
  font-size: 14px;
}

.layer-code {
  position: absolute;
  top: 50%;
  right: 22px;
  color: rgba(127, 245, 240, 0.24);
  font-family: var(--font-mono);
  font-size: 10px;
  writing-mode: vertical-rl;
  transform: translateY(-50%);
}

.flow-section {
  padding-block: 78px;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  background: var(--navy-950);
}

.flow-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 46px;
}

.flow-heading .section-index { margin-bottom: 0; }
.flow-heading h2 { font-size: clamp(28px, 3vw, 42px); }

.flow-track {
  display: grid;
  grid-template-columns: repeat(7, auto);
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
}

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

.flow-item span {
  margin-bottom: 8px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.flow-item strong {
  white-space: nowrap;
  font-size: 15px;
  font-weight: 570;
}

.flow-track svg {
  width: clamp(34px, 4vw, 68px);
  fill: none;
  stroke: rgba(25, 230, 230, 0.42);
  stroke-width: 1;
}

.process-section .section-head { margin-bottom: 0; }

.process-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-item {
  min-height: 146px;
  display: grid;
  grid-template-columns: 90px 1fr 1.1fr 40px;
  align-items: center;
  gap: 40px;
  border-bottom: 1px solid var(--line-light);
  transition: background 220ms ease, padding 220ms ease;
}

.process-item:hover {
  padding-inline: 20px;
  background: #edf3f4;
}

.process-no {
  color: #73888f;
  font-family: var(--font-mono);
  font-size: 12px;
}

.process-tag {
  display: block;
  margin-bottom: 4px;
  color: #087f86;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.process-item h3 {
  margin: 0;
  font-size: 23px;
  font-weight: 620;
}

.process-item p {
  margin: 0;
  color: #5d7077;
  font-size: 14px;
}

.process-arrow {
  color: #0a858c;
  font-family: var(--font-mono);
  font-size: 22px;
  transition: transform 220ms ease;
}

.process-item:hover .process-arrow { transform: translate(5px, 5px); }

.about-section {
  overflow: hidden;
  background: #091725;
}

.about-grid {
  opacity: 0.26;
  mask-image: linear-gradient(90deg, #000, transparent 70%);
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: clamp(60px, 10vw, 150px);
}

.about-poster {
  min-height: 520px;
  position: relative;
  border: 1px solid rgba(154, 191, 198, 0.18);
  background: linear-gradient(145deg, rgba(18, 47, 66, 0.66), rgba(7, 17, 30, 0.75));
  overflow: hidden;
}

.poster-axis {
  position: absolute;
  background: rgba(25, 230, 230, 0.3);
}

.axis-x { top: 50%; right: 0; left: 0; height: 1px; }
.axis-y { top: 0; bottom: 0; left: 50%; width: 1px; }

.poster-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(25, 230, 230, 0.42);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.ring-one { width: 48%; aspect-ratio: 1; }
.ring-two { width: 74%; aspect-ratio: 1; opacity: 0.4; }

.poster-block {
  position: absolute;
  background: var(--cyan);
  mix-blend-mode: screen;
}

.block-one {
  top: 25%;
  left: 26%;
  width: 28%;
  height: 34%;
  opacity: 0.7;
}

.block-two {
  right: 22%;
  bottom: 22%;
  width: 22%;
  height: 30%;
  opacity: 0.18;
}

.poster-dots {
  position: absolute;
  right: 6%;
  bottom: 6%;
  width: 32%;
  height: 24%;
  opacity: 0.55;
  background-image: radial-gradient(circle, var(--cyan) 1px, transparent 1.2px);
  background-size: 12px 12px;
}

.poster-index {
  position: absolute;
  top: 20px;
  left: 22px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
}

.about-copy > p:not(.section-index) {
  margin: 28px 0 0;
  color: #a1b4ba;
  font-size: 16px;
  line-height: 2;
}

.about-copy blockquote {
  margin: 36px 0 0;
  padding: 16px 0 16px 24px;
  border-left: 2px solid var(--cyan);
  color: var(--mist-100);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
}

.about-values {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 34px;
}

.about-values span {
  padding: 7px 12px;
  border: 1px solid rgba(25, 230, 230, 0.25);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

.contact-section {
  min-height: 560px;
  position: relative;
  display: flex;
  align-items: center;
  padding: 100px 0;
  overflow: hidden;
  background: var(--navy-950);
}

.contact-section::before {
  content: "";
  position: absolute;
  top: 0;
  right: 8%;
  width: 1px;
  height: 100%;
  background: linear-gradient(transparent, rgba(25, 230, 230, 0.4), transparent);
  transform: rotate(22deg);
}

.contact-grid {
  opacity: 0.25;
  mask-image: radial-gradient(circle at 68% 45%, #000, transparent 62%);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: end;
  gap: 100px;
}

.contact-section h2 {
  font-size: clamp(42px, 5.4vw, 76px);
}

.contact-action {
  padding-left: 32px;
  border-left: 1px solid var(--line-dark);
}

.contact-action p {
  max-width: 410px;
  margin: 0 0 28px;
  color: #9eb1b7;
  line-height: 1.9;
}

.button-large {
  min-height: 58px;
  padding-inline: 26px;
}

.back-top {
  display: block;
  width: max-content;
  margin-top: 24px;
  color: var(--mist-400);
  font-family: var(--font-mono);
  font-size: 11px;
  transition: color 180ms ease;
}

.back-top:hover { color: var(--cyan); }

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms cubic-bezier(.2, .65, .3, 1), transform 700ms cubic-bezier(.2, .65, .3, 1);
}

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

.capability-grid .reveal:nth-child(2),
.solution-stack .reveal:nth-child(2) { transition-delay: 80ms; }
.capability-grid .reveal:nth-child(3),
.solution-stack .reveal:nth-child(3) { transition-delay: 160ms; }
.capability-grid .reveal:nth-child(4),
.solution-stack .reveal:nth-child(4) { transition-delay: 240ms; }

@media (max-width: 1100px) {
  .site-nav { gap: 22px; }
  .hero-layout { grid-template-columns: minmax(0, 1fr) minmax(380px, 0.8fr); gap: 44px; }
  .hero h1 { font-size: clamp(44px, 5.5vw, 64px); }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .capability-card { min-height: 390px; }
  .flow-track { gap: 14px; }
}

@media (max-width: 900px) {
  :root { --header-height: 70px; --shell: min(calc(100% - 36px), 760px); }

  .header-inner { width: calc(100% - 36px); }
  .brand { min-width: 0; }
  .brand-copy small { display: none; }
  .nav-toggle { display: inline-flex; z-index: 2; }
  .site-nav {
    position: fixed;
    z-index: 1;
    inset: var(--header-height) 0 auto;
    display: grid;
    gap: 0;
    padding: 18px;
    border-bottom: 1px solid var(--line-dark);
    background: rgba(5, 11, 19, 0.98);
    box-shadow: 0 28px 40px rgba(0, 0, 0, 0.32);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 180ms ease, visibility 180ms ease, transform 180ms ease;
  }
  .site-nav a { padding: 14px 10px; border-bottom: 1px solid var(--line-dark); }
  .site-nav a:not(.nav-cta)::after { display: none; }
  .site-nav .nav-cta { margin-top: 10px; text-align: center; border: 1px solid rgba(25, 230, 230, 0.58); }
  .nav-open .site-nav { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-open .nav-toggle-icon i { top: 9px; width: 100%; }
  .nav-open .nav-toggle-icon i:first-child { transform: rotate(45deg); }
  .nav-open .nav-toggle-icon i:last-child { transform: rotate(-45deg); }
  .no-js .site-nav { opacity: 1; visibility: visible; transform: none; }
  .no-js .nav-toggle { display: none; }

  .hero { padding-top: calc(var(--header-height) + 70px); }
  .hero-layout { grid-template-columns: 1fr; }
  .hero-copy { max-width: 700px; }
  .hero-system { width: min(100%, 600px); margin: 10px auto 0; }
  .system-frame { transform: none; }
  .system-stamp { right: 16px; }

  .section { padding: 92px 0; }
  .section-head { grid-template-columns: 1fr; gap: 24px; margin-bottom: 48px; }
  .solution-layout { grid-template-columns: 1fr; gap: 56px; }
  .solution-copy { position: static; }
  .flow-heading { align-items: flex-start; flex-direction: column; }
  .flow-track { grid-template-columns: 1fr; gap: 12px; }
  .flow-track svg { width: 44px; margin-left: 28px; transform: rotate(90deg); }
  .flow-item { padding: 10px 0; }
  .process-item { grid-template-columns: 56px 0.8fr 1.2fr 30px; gap: 24px; }
  .about-layout { grid-template-columns: 0.85fr 1.15fr; gap: 50px; }
  .about-poster { min-height: 440px; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .contact-action { max-width: 560px; }
}

@media (max-width: 640px) {
  :root { --shell: calc(100% - 32px); }
  .header-inner { width: calc(100% - 32px); }
  .brand-copy strong { font-size: 14px; letter-spacing: 0.14em; }
  .brand-mark { width: 29px; height: 29px; }
  .nav-toggle-label { display: none; }

  .hero { min-height: 0; padding: calc(var(--header-height) + 54px) 0 76px; }
  .hero h1 { font-size: clamp(39px, 12vw, 54px); letter-spacing: -0.06em; }
  .hero-lead { font-size: 15px; line-height: 1.9; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .hero-principles { justify-content: space-between; gap: 12px; }
  .hero-principles div { grid-template-columns: 1fr; gap: 2px; }
  .system-canvas { min-height: 360px; }
  .system-core { width: 108px; }
  .system-node { width: 86px; padding: 9px; }
  .system-node b { font-size: 11px; }
  .system-node small { font-size: 9px; }
  .system-footer { justify-content: space-between; gap: 6px; padding-inline: 12px; }
  .system-stamp { width: 72px; height: 72px; bottom: -26px; }
  .strip-inner { min-height: 110px; align-items: flex-start; flex-direction: column; gap: 5px; padding-block: 20px; }
  .strip-inner i { display: none; }

  .section { padding: 76px 0; }
  .section h2 { font-size: clamp(32px, 9vw, 44px); }
  .section-head { padding-bottom: 28px; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-card { min-height: 0; padding: 26px 22px 32px; }
  .capability-card:hover { transform: none; }
  .card-icon { margin: 28px 0 24px; }

  .solution-stack { padding-right: 0; }
  .solution-layer,
  .solution-layer:nth-child(2),
  .solution-layer:nth-child(3),
  .solution-layer:nth-child(4) {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-left: 0;
    padding: 24px 48px 24px 22px;
  }
  .solution-layer:hover { transform: none; }
  .flow-section { padding-block: 64px; }

  .process-item {
    grid-template-columns: 42px 1fr 24px;
    gap: 14px;
    padding: 24px 0;
  }
  .process-item:hover { padding-inline: 10px; }
  .process-item p { grid-column: 2 / -1; }
  .process-arrow { grid-row: 1; grid-column: 3; }

  .about-layout { grid-template-columns: 1fr; }
  .about-poster { min-height: 330px; order: 2; }
  .about-copy { order: 1; }
  .contact-section { min-height: 0; padding: 82px 0; }
  .contact-section h2 { font-size: clamp(40px, 12vw, 58px); }
  .contact-action { padding: 0; border: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
  .title-accent::after { transform: scaleX(1); opacity: 0.12; }
}

@media (prefers-contrast: more) {
  :root { --mist-400: #bdcbd0; --line-dark: rgba(255, 255, 255, 0.32); }
  .hero-lead, .solution-lead, .about-copy > p:not(.section-index), .contact-action p { color: #cfdbde; }
  .section-head > p, .capability-card p, .process-item p { color: #32474f; }
}