:root {
  --navy-950: #041321;
  --navy-900: #071b2f;
  --navy-800: #0b2942;
  --mist-100: #f3f6f7;
  --mist-200: #e2e9ec;
  --mist-300: #cbd7dc;
  --ink: #0a2135;
  --muted: #526777;
  --cyan: #14e4e7;
  --cyan-dark: #00bcc4;
  --white: #ffffff;
  --border: #b9c8ce;
  --radius: 6px;
  --shell: min(1180px, calc(100% - 64px));
  --header-height: 82px;
  --ease: cubic-bezier(.2,.8,.2,1);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--mist-100);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
svg { display: block; }

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 16px;
  color: var(--navy-950);
  background: var(--cyan);
  border: 2px solid var(--navy-950);
  transform: translateY(-160%);
  transition: transform .2s ease;
}

.skip-link:focus { transform: translateY(0); }
.page-shell { width: var(--shell); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  color: var(--white);
  background: rgba(7, 27, 47, .96);
  border-bottom: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: var(--shell);
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  min-width: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 3px;
  padding: 5px;
  flex: 0 0 auto;
  background: var(--cyan);
}

.brand-mark span { display: block; background: var(--navy-950); }
.brand-mark span:nth-child(1) { height: 55%; }
.brand-mark span:nth-child(2) { height: 100%; }
.brand-mark span:nth-child(3) { height: 75%; }

.site-nav { display: flex; align-items: center; gap: clamp(20px, 2.4vw, 36px); }
.site-nav a { position: relative; color: #dbe7ec; font-size: 14px; font-weight: 600; }
.site-nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -9px;
  height: 2px;
  background: var(--cyan);
  transition: right .25s var(--ease);
}
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.site-nav .nav-cta {
  padding: 10px 16px;
  color: var(--navy-950);
  background: var(--cyan);
  border: 1px solid var(--cyan);
  transition: background .2s ease, color .2s ease;
}
.site-nav .nav-cta:hover { color: var(--white); background: transparent; }
.menu-toggle { display: none; }

.hero { color: var(--white); background: var(--navy-900); overflow: hidden; }
.hero-grid {
  min-height: min(730px, calc(100vh - var(--header-height) - 58px));
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(400px, .9fr);
  align-items: center;
  gap: clamp(50px, 7vw, 110px);
  padding-block: 80px;
}

.eyebrow, .section-kicker {
  margin: 0 0 26px;
  color: var(--cyan-dark);
  font-size: 13px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .2em;
}

.eyebrow { display: flex; align-items: center; gap: 12px; color: var(--cyan); }
.eyebrow span { width: 36px; height: 2px; background: var(--cyan); }

.hero h1, .section h2 {
  margin: 0;
  font-weight: 760;
  letter-spacing: -.055em;
  line-height: 1.12;
}
.hero h1 { max-width: 760px; font-size: clamp(48px, 6vw, 82px); }
.hero h1 em { color: var(--cyan); font-style: normal; }
.hero-lead { max-width: 620px; margin: 34px 0 0; color: #b7c7cf; font-size: clamp(17px, 1.5vw, 20px); }

.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 42px; }
.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
  padding: 13px 20px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 800;
  transition: transform .2s var(--ease), background .2s ease, color .2s ease;
}
.button:hover { transform: translate(-3px, -3px); }
.button-primary { color: var(--navy-950); background: var(--cyan); box-shadow: 5px 5px 0 rgba(20,228,231,.2); }
.button-primary:hover { background: var(--white); }
.text-link, .contact-link { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 700; }
.text-link span, .contact-link span { color: var(--cyan); transition: transform .2s ease; }
.text-link:hover span { transform: translateY(4px); }

.hero-visual {
  position: relative;
  min-height: 470px;
  border: 1px solid rgba(255,255,255,.28);
  background: #0a233a;
  isolation: isolate;
}
.visual-grid {
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: .13;
  background-image: linear-gradient(rgba(255,255,255,.8) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.8) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero-visual::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 44%;
  aspect-ratio: 1;
  right: 12%;
  top: 19%;
  background: var(--cyan);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  opacity: .88;
}
.hero-visual::after {
  content: "";
  position: absolute;
  width: 34%;
  height: 12px;
  right: 1px;
  bottom: -1px;
  background: var(--cyan);
}
.orbit { position: absolute; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; }
.orbit-one { width: 61%; aspect-ratio: 1; right: 3%; top: 9%; }
.orbit-two { width: 43%; aspect-ratio: 1; right: 12%; top: 18%; }
.signal-card {
  position: absolute;
  color: var(--navy-950);
  background: var(--white);
  border: 1px solid var(--navy-950);
  box-shadow: 7px 7px 0 var(--navy-950);
}
.signal-card-main {
  left: -30px;
  bottom: 64px;
  width: min(360px, 82%);
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 8px;
  padding: 28px 24px 22px;
  text-align: center;
}
.signal-label { position: absolute; top: -27px; left: -1px; padding: 4px 10px; color: var(--navy-950); background: var(--cyan); font-size: 12px; font-weight: 800; }
.signal-card-main strong { font-size: 17px; }
.signal-arrow { color: var(--cyan-dark); }
.signal-card-small { top: 38px; right: -22px; display: flex; align-items: center; gap: 10px; padding: 11px 14px; font-size: 13px; font-weight: 800; box-shadow: 5px 5px 0 var(--cyan); }
.pulse { width: 9px; height: 9px; background: var(--cyan-dark); border-radius: 50%; box-shadow: 0 0 0 4px rgba(0,188,196,.15); }
.corner-note { position: absolute; left: 20px; top: 14px; color: rgba(255,255,255,.52); font-size: 13px; font-weight: 700; }

.hero-strip { border-top: 1px solid rgba(255,255,255,.16); background: var(--navy-950); }
.strip-inner { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: #a8bcc7; font-size: 13px; font-weight: 700; letter-spacing: .12em; }
.strip-inner i { width: 5px; height: 5px; background: var(--cyan); transform: rotate(45deg); }

.section { padding-block: clamp(90px, 11vw, 150px); }
.section h2 { font-size: clamp(38px, 5vw, 64px); }

.about {
  display: grid;
  grid-template-columns: 70px minmax(130px, .35fr) 1.1fr .85fr;
  grid-template-areas:
    "index kicker heading copy"
    ". . quote quote";
  column-gap: clamp(22px, 3vw, 54px);
  row-gap: 70px;
  border-bottom: 1px solid var(--border);
}
.section-index { grid-area: index; color: var(--cyan-dark); font-size: 13px; font-weight: 800; }
.about > .section-kicker { grid-area: kicker; }
.about-heading { grid-area: heading; }
.about-copy { grid-area: copy; padding-top: 4px; }
.about-copy p { margin: 0 0 22px; color: var(--muted); }
.about-quote {
  grid-area: quote;
  position: relative;
  display: grid;
  grid-template-columns: 70px 1fr;
  align-items: start;
  gap: 18px;
  padding: 34px 40px 36px;
  background: var(--white);
  border-left: 5px solid var(--cyan-dark);
  box-shadow: 0 18px 50px rgba(5,34,54,.06);
}
.about-quote p { max-width: 720px; margin: 0; font-size: clamp(20px, 2.1vw, 28px); font-weight: 700; line-height: 1.55; }
.quote-mark { color: var(--cyan-dark); font-family: Georgia, serif; font-size: 74px; line-height: .9; }

.services { background: var(--white); }
.section-heading { display: grid; grid-template-columns: 1.4fr .6fr; align-items: end; gap: 60px; margin-bottom: 64px; }
.section-heading > p { max-width: 400px; margin: 0 0 8px; color: var(--muted); }
.service-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 18px; }
.service-card {
  min-height: 390px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(26px, 3.5vw, 44px);
  background: var(--mist-100);
  border: 1px solid var(--border);
  transition: transform .25s var(--ease), border-color .25s ease, box-shadow .25s ease;
}
.service-card:nth-child(2), .service-card:nth-child(4) { transform: translateY(48px); }
.service-card:hover { border-color: var(--cyan-dark); box-shadow: 8px 8px 0 var(--mist-200); }
.service-card:nth-child(2):hover, .service-card:nth-child(4):hover { transform: translate(-4px, 44px); }
.service-card:nth-child(1):hover, .service-card:nth-child(3):hover { transform: translate(-4px, -4px); }
.service-card-featured { background: var(--cyan); border-color: var(--navy-900); }
.service-card-dark { color: var(--white); background: var(--navy-900); border-color: var(--navy-900); }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; }
.card-number { font-size: 13px; font-weight: 800; }
.card-icon { width: 48px; color: var(--cyan-dark); }
.card-icon svg { width: 100%; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: square; stroke-linejoin: miter; }
.service-card-featured .card-icon { color: var(--navy-900); }
.service-card-dark .card-icon { color: var(--cyan); }
.service-card h3 { margin: 42px 0 14px; font-size: clamp(28px, 3vw, 38px); letter-spacing: -.04em; }
.service-card p { max-width: 580px; margin: 0; color: var(--muted); }
.service-card-featured p { color: #16444e; }
.service-card-dark p { color: #b9cbd3; }
.service-card ul { display: flex; flex-wrap: wrap; gap: 8px; margin: 30px 0 0; padding: 0; list-style: none; }
.service-card li { padding: 5px 10px; border: 1px solid currentColor; font-size: 12px; font-weight: 700; }

.process { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(50px, 9vw, 130px); }
.process-intro { position: sticky; top: calc(var(--header-height) + 40px); align-self: start; }
.process-intro > p:last-child { max-width: 430px; margin: 32px 0 0; color: var(--muted); }
.process-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--border); }
.process-list li {
  position: relative;
  min-height: 174px;
  display: grid;
  grid-template-columns: 55px 1fr 42px;
  gap: 24px;
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--border);
}
.step-number { align-self: start; color: var(--cyan-dark); font-size: 13px; font-weight: 800; }
.process-list h3 { margin: 0 0 8px; font-size: 24px; }
.process-list p { max-width: 480px; margin: 0; color: var(--muted); }
.step-shape { width: 32px; height: 32px; border: 2px solid var(--navy-800); transform: rotate(45deg); transition: background .2s ease, transform .25s var(--ease); }
.process-list li:hover .step-shape { background: var(--cyan); transform: rotate(90deg); }

.values { color: var(--white); background: var(--navy-900); }
.values-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; grid-template-rows: auto auto; gap: 18px; }
.values-title { padding: 12px 50px 30px 0; }
.values-title .section-kicker { color: var(--cyan); }
.value-card { min-height: 300px; display: flex; flex-direction: column; padding: 32px; background: var(--navy-800); border: 1px solid rgba(255,255,255,.25); }
.value-card > span { color: var(--cyan); font-size: 13px; font-weight: 800; }
.value-card h3 { margin: auto 0 12px; font-size: 27px; }
.value-card p { margin: 0; color: #b9cbd3; }
.value-card-cyan { color: var(--navy-950); background: var(--cyan); border-color: var(--cyan); }
.value-card-cyan > span, .value-card-cyan p { color: #16444e; }
.value-card-outline { background: transparent; }
.value-card-wide { position: relative; grid-column: 2 / 4; min-height: 260px; overflow: hidden; }
.value-card-wide p { max-width: 510px; }
.value-line { position: absolute; right: 34px; bottom: 34px; width: 36%; height: 90px; display: flex; align-items: flex-end; gap: 7px; }
.value-line::before { content: ""; position: absolute; inset: 0; border-bottom: 1px solid rgba(255,255,255,.25); border-left: 1px solid rgba(255,255,255,.25); }
.value-line i { z-index: 1; flex: 1; background: var(--cyan); }
.value-line i:nth-child(1) { height: 32%; }
.value-line i:nth-child(2) { height: 62%; }
.value-line i:nth-child(3) { height: 100%; }

.contact { position: relative; padding-block: clamp(100px, 13vw, 170px); color: var(--white); background: var(--navy-950); overflow: hidden; }
.contact-inner { position: relative; z-index: 1; }
.contact .section-kicker { color: var(--cyan); }
.contact h2 { max-width: 940px; font-size: clamp(42px, 6vw, 76px); }
.contact-inner > p:not(.section-kicker) { max-width: 660px; margin: 30px 0 0; color: #adc0c9; font-size: 18px; }
.contact-actions { display: flex; align-items: center; gap: 30px; margin-top: 44px; }
.button-light { color: var(--navy-950); background: var(--white); box-shadow: 5px 5px 0 var(--cyan); }
.button-light:hover { background: var(--cyan); }
.contact-link:hover span { transform: translateY(-4px); }
.contact-shape { position: absolute; width: 310px; height: 310px; right: -20px; top: -35px; opacity: .3; }
.contact-shape::before, .contact-shape::after, .contact-shape span { content: ""; position: absolute; border: 1px solid var(--cyan); transform: rotate(45deg); }
.contact-shape::before { inset: 0; }
.contact-shape::after { inset: 54px; }
.contact-shape span:first-child { inset: 108px; background: var(--cyan); }
.contact-shape span:last-child { width: 115px; height: 1px; border: 0; top: 50%; left: -22px; background: var(--cyan); transform: none; }

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--navy-950);
  background: var(--cyan);
  border: 1px solid var(--navy-950);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--white); }

.reveal { opacity: 1; translate: 0 0; }
.reveal-ready .reveal {
  opacity: 0;
  translate: 0 24px;
  transition: opacity .55s var(--ease), translate .55s var(--ease);
}
.reveal-ready .reveal.is-in { opacity: 1; translate: 0 0; }

@media (max-width: 1020px) {
  :root { --shell: min(calc(100% - 40px), 900px); }
  .site-nav { gap: 18px; }
  .site-nav a { font-size: 13px; }
  .hero-grid { grid-template-columns: 1fr .82fr; gap: 45px; }
  .hero-visual { min-height: 410px; }
  .about { grid-template-columns: 50px .28fr 1fr; grid-template-areas: "index kicker heading" ". . copy" ". . quote"; row-gap: 42px; }
  .about-quote { grid-template-columns: 52px 1fr; padding-inline: 26px; }
  .process { gap: 60px; }
}

@media (max-width: 820px) {
  :root { --header-height: 70px; }
  .menu-toggle {
    position: relative;
    z-index: 102;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--white);
    background: transparent;
    border: 0;
    cursor: pointer;
  }
  .menu-toggle-text { font-size: 13px; font-weight: 700; }
  .menu-icon { width: 23px; display: grid; gap: 6px; }
  .menu-icon i { height: 2px; display: block; background: var(--cyan); transition: transform .2s ease; }
  .menu-toggle[aria-expanded="true"] .menu-icon i:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-icon i:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 101;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 20px;
    padding: 88px max(26px, calc((100vw - 680px) / 2));
    background: var(--navy-950);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
  }
  .site-nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
  .site-nav a { font-size: clamp(24px, 7vw, 38px); }
  .site-nav .nav-cta { margin-top: 16px; font-size: 16px; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr; padding-block: 76px 60px; }
  .hero-copy { max-width: 710px; }
  .hero-visual { width: min(570px, 92%); min-height: 410px; margin-left: auto; }
  .signal-card-main { left: -8%; }
  .signal-card-small { right: -4%; }
  .about { grid-template-columns: 46px 1fr; grid-template-areas: "index kicker" ". heading" ". copy" ". quote"; }
  .section-heading { grid-template-columns: 1fr; gap: 26px; }
  .service-card { min-height: 360px; }
  .process { grid-template-columns: 1fr; }
  .process-intro { position: static; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .values-title { grid-column: 1 / 3; }
  .value-card-wide { grid-column: 1 / 3; }
}

@media (max-width: 620px) {
  :root { --shell: calc(100% - 32px); }
  body { font-size: 15px; }
  .brand-name { max-width: 215px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }
  .hero-grid { gap: 50px; padding-top: 62px; }
  .hero h1 { font-size: clamp(42px, 12vw, 58px); }
  .hero h1 br { display: none; }
  .hero-lead { margin-top: 26px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 22px; margin-top: 34px; }
  .hero-visual { width: calc(100% - 14px); min-height: 330px; }
  .hero-visual::before { width: 50%; right: 8%; }
  .signal-card-main { bottom: 43px; width: 92%; padding: 24px 14px 19px; }
  .signal-card-main strong { font-size: 14px; }
  .signal-card-small { top: 27px; right: -8px; }
  .strip-inner { min-height: 72px; justify-content: flex-start; flex-wrap: wrap; gap: 8px 15px; padding-block: 12px; letter-spacing: .06em; }
  .strip-inner i { width: 4px; height: 4px; }
  .section { padding-block: 82px; }
  .section h2 { font-size: clamp(36px, 10vw, 50px); }
  .about { grid-template-columns: 1fr; grid-template-areas: "index" "kicker" "heading" "copy" "quote"; gap: 22px; }
  .about > .section-kicker { margin-bottom: 4px; }
  .about-quote { grid-template-columns: 34px 1fr; gap: 8px; padding: 26px 20px; }
  .quote-mark { font-size: 52px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card, .service-card:nth-child(2), .service-card:nth-child(4) { min-height: 340px; transform: none; }
  .service-card:nth-child(2):hover, .service-card:nth-child(4):hover { transform: translate(-3px, -3px); }
  .process { gap: 48px; }
  .process-list li { grid-template-columns: 36px 1fr 24px; gap: 12px; }
  .step-shape { width: 20px; height: 20px; }
  .values-grid { grid-template-columns: 1fr; }
  .values-title, .value-card-wide { grid-column: 1; }
  .values-title { padding-right: 0; }
  .value-card { min-height: 260px; }
  .value-card-wide { min-height: 340px; }
  .value-line { width: 55%; }
  .contact h2 br { display: none; }
  .contact-inner > p:not(.section-kicker) { font-size: 16px; }
  .contact-actions { align-items: flex-start; flex-direction: column; }
  .contact-shape { width: 180px; height: 180px; right: -50px; top: -25px; }
  .contact-shape::after { inset: 35px; }
  .contact-shape span:first-child { inset: 70px; }
  .back-to-top { right: 14px; bottom: 14px; }
}

@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-ready .reveal { opacity: 1; translate: 0 0; }
}