:root {
  --ink: #091a34;
  --ink-soft: #39475b;
  --blue: #145cff;
  --blue-deep: #0748d8;
  --paper: #ffffff;
  --mist: #f3f6fb;
  --line: #dce3ed;
  --shell: 1200px;
}

* { box-sizing: border-box; }

html {
  background: var(--paper);
}

section[id] { scroll-margin-top: 92px; }

body {
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  transform: translateY(-140%);
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
}

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

.shell {
  width: min(calc(100% - 64px), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 227, 237, .9);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: -.04em;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 42px);
}

.nav a {
  position: relative;
  color: #4c586a;
  font-size: 14px;
  text-decoration: none;
  transition: color .2s ease;
}

.nav a::after {
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

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

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

.hero {
  min-height: 760px;
  padding: 94px 0 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr);
  align-items: center;
  gap: clamp(48px, 7vw, 100px);
}

.hero-copy h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(60px, 6.25vw, 92px);
  font-weight: 680;
  line-height: 1.06;
  letter-spacing: -.065em;
  overflow-wrap: anywhere;
}

.hero-copy h1 span { color: var(--blue); }

.hero-copy p {
  max-width: 560px;
  margin: 42px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 4.5;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #eef3fa;
  isolation: isolate;
}

.grid-plane {
  position: absolute;
  inset: 0;
  z-index: -3;
  background-image:
    linear-gradient(rgba(9, 26, 52, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(9, 26, 52, .08) 1px, transparent 1px);
  background-size: 48px 48px;
  transform: perspective(700px) rotateX(58deg) scale(1.65) translateY(22%);
  transform-origin: bottom;
}

.glass,
.metal-frame,
.blue-core { position: absolute; }

.glass {
  border: 1px solid rgba(255, 255, 255, .9);
  box-shadow: 0 30px 80px rgba(16, 57, 131, .17);
  backdrop-filter: blur(4px);
}

.glass-one {
  width: 59%;
  height: 66%;
  top: 14%;
  left: 8%;
  background: linear-gradient(145deg, rgba(255, 255, 255, .76), rgba(178, 204, 248, .19));
  transform: rotate(-12deg) skewY(5deg);
}

.glass-two {
  width: 48%;
  height: 52%;
  right: 7%;
  bottom: 7%;
  background: linear-gradient(145deg, rgba(255, 255, 255, .42), rgba(20, 92, 255, .14));
  transform: rotate(14deg) skewY(-5deg);
}

.metal-frame {
  width: 56%;
  height: 68%;
  top: 18%;
  left: 27%;
  z-index: -1;
  border: 18px solid #9aa7b8;
  border-top-color: #e7edf5;
  border-right-color: #617084;
  box-shadow: 18px 24px 50px rgba(9, 26, 52, .22);
  transform: rotate(8deg);
}

.blue-core {
  width: 29%;
  height: 42%;
  right: 18%;
  bottom: 14%;
  z-index: -2;
  background: var(--blue);
  box-shadow: 0 28px 70px rgba(20, 92, 255, .35);
  transform: rotate(-18deg);
}

.coordinate {
  position: absolute;
  z-index: 5;
  color: rgba(9, 26, 52, .58);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .16em;
}

.coordinate-top { top: 18px; left: 20px; }
.coordinate-bottom { right: 20px; bottom: 18px; }

.hero-rule {
  width: min(calc(100% - 64px), var(--shell));
  height: 1px;
  margin: 74px auto 0;
  background: var(--line);
}

.hero-rule span {
  display: block;
  width: 22%;
  height: 3px;
  background: var(--blue);
  transform: translateY(-1px);
}

.section { padding: 142px 0; }

.two-column {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: clamp(34px, 6vw, 92px);
}

.section-index {
  padding-top: 8px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
}

.section h2 {
  margin: 0;
  font-size: clamp(42px, 4.6vw, 66px);
  font-weight: 660;
  line-height: 1.06;
  letter-spacing: -.055em;
}

.about { background: var(--paper); }

.about-content .lead {
  max-width: 870px;
  margin: 68px 0 0;
  font-size: clamp(30px, 3vw, 43px);
  font-weight: 500;
  line-height: 1.48;
  letter-spacing: -.035em;
}

.about-content > p:last-child {
  max-width: 680px;
  margin: 38px 0 0 auto;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.9;
}

.capabilities { background: var(--mist); }

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 36px;
  margin-bottom: 76px;
}

.section-heading > p {
  max-width: 320px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.capability-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.capability-list li {
  display: grid;
  grid-template-columns: 76px minmax(180px, .72fr) minmax(260px, 1fr);
  align-items: baseline;
  gap: 30px;
  padding: 34px 0;
  border-bottom: 1px solid #cbd4e1;
}

.item-number {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}

.capability-list h3 {
  margin: 0;
  font-size: clamp(25px, 2.7vw, 36px);
  font-weight: 620;
  letter-spacing: -.035em;
}

.capability-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.75;
}

.section-dark {
  color: #fff;
  background: var(--ink);
}

.dark-heading {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: clamp(34px, 6vw, 92px);
}

.dark-heading .section-index { color: #6f9cff; }

.dark-heading p {
  margin: 20px 0 0;
  color: #aebcd0;
  font-size: 16px;
}

.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 100px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #43516a;
}

.process li {
  position: relative;
  min-height: 230px;
  padding: 30px 24px 20px 0;
}

.process li:not(:last-child) { border-right: 1px solid #43516a; }
.process li:not(:first-child) { padding-left: 28px; }

.process li::before {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  content: "";
  background: var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 0 6px var(--ink);
}

.process li:not(:first-child)::before { left: 28px; }

.process span {
  color: #8090a9;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
}

.process h3 {
  margin: 54px 0 14px;
  font-size: 31px;
  font-weight: 600;
}

.process p {
  margin: 0;
  color: #aebcd0;
  font-size: 15px;
}

.value-list { margin: 64px 0 0; }

.value-list > div {
  display: grid;
  grid-template-columns: minmax(190px, .7fr) minmax(280px, 1fr);
  align-items: center;
  gap: 48px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.value-list > div:last-child { border-bottom: 1px solid var(--line); }

.value-list dt {
  font-size: clamp(35px, 4vw, 54px);
  font-weight: 620;
  letter-spacing: -.045em;
}

.value-list dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.8;
}

.statement {
  min-height: 470px;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: var(--blue);
}

.statement .shell {
  position: relative;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
}

.statement p {
  position: relative;
  z-index: 2;
  margin: 0;
  font-size: clamp(62px, 8.2vw, 116px);
  font-weight: 680;
  line-height: .98;
  letter-spacing: -.07em;
}

.statement span {
  position: absolute;
  right: -30px;
  bottom: -126px;
  color: rgba(255, 255, 255, .12);
  font-size: 360px;
  font-weight: 900;
  letter-spacing: -.11em;
  line-height: 1;
  user-select: none;
}

.footer { background: #07152a; }

.footer-inner {
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  color: #a9b5c6;
  font-size: 13px;
}

.footer-inner span:first-child {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

@media (max-width: 920px) {
  .shell { width: min(calc(100% - 40px), var(--shell)); }
  .header-inner { min-height: 70px; }
  .nav { display: none; }
  .hero { min-height: auto; padding-top: 62px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy h1 { font-size: clamp(53px, 11vw, 76px); }
  .hero-copy p { margin-top: 30px; }
  .hero-visual { width: min(100%, 620px); min-height: 0; aspect-ratio: 5 / 4; margin-left: auto; }
  .hero-rule { width: calc(100% - 40px); margin-top: 58px; }
  .section { padding: 100px 0; }
  .two-column,
  .dark-heading { grid-template-columns: 58px minmax(0, 1fr); gap: 24px; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .process li:nth-child(2) { border-right: 0; }
  .process li:nth-child(n+3) { border-top: 1px solid #43516a; }
  .process li:nth-child(3)::before,
  .process li:nth-child(4)::before { top: -5px; }
}

@media (max-width: 640px) {
  .shell { width: min(calc(100% - 32px), var(--shell)); }
  .brand-mark { width: 34px; height: 34px; }
  .hero { padding-top: 50px; }
  .hero-grid { gap: 54px; }
  .hero-copy h1 { font-size: clamp(44px, 13vw, 51px); line-height: 1.08; }
  .hero-copy p { font-size: 16px; line-height: 1.8; }
  .hero-visual { aspect-ratio: 1 / 1.05; }
  .coordinate-top { max-width: 170px; line-height: 1.5; }
  .hero-rule { width: calc(100% - 32px); }
  .section { padding: 82px 0; }
  .two-column,
  .dark-heading { grid-template-columns: 1fr; gap: 22px; }
  .section-index { padding: 0; }
  .section h2 { font-size: 44px; }
  .about-content .lead { margin-top: 42px; font-size: 28px; }
  .about-content > p:last-child { margin-top: 28px; }
  .section-heading { align-items: start; flex-direction: column; margin-bottom: 48px; }
  .capability-list li { grid-template-columns: 44px 1fr; gap: 18px; }
  .capability-list p { grid-column: 2; }
  .process { grid-template-columns: 1fr; margin-top: 64px; }
  .process li,
  .process li:not(:first-child) { min-height: 180px; padding: 27px 0; border-right: 0; border-top: 1px solid #43516a; }
  .process li:first-child { border-top: 0; }
  .process li::before,
  .process li:not(:first-child)::before { top: -5px; left: 0; }
  .process li:first-child::before { top: -5px; }
  .process h3 { margin-top: 36px; }
  .value-list { margin-top: 42px; }
  .value-list > div { grid-template-columns: 1fr; gap: 12px; padding: 28px 0; }
  .statement { min-height: 390px; }
  .statement p { font-size: clamp(58px, 18vw, 80px); }
  .statement span { right: -22px; bottom: -72px; font-size: 220px; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}