:root {
  --ink: #101827;
  --blue: #2f5bff;
  --paper: #f4f1e8;
  --white: #fffdf8;
  --slate: #667085;
  --line: rgba(16, 24, 39, 0.16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.site-header { height: 108px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 15px; }
.brand-mark { width: 48px; height: 48px; display: grid; place-items: center; background: var(--ink); color: white; font-weight: 800; font-size: 25px; }
.brand > span:last-child { display: grid; line-height: 1; gap: 8px; }
.brand strong { font-size: 22px; letter-spacing: .12em; white-space: nowrap; }
.brand small { color: var(--slate); font-size: 13px; font-weight: 700; letter-spacing: .1em; }
nav { display: flex; align-items: center; gap: 34px; font-size: 15px; font-weight: 600; }
nav a { transition: color .2s ease; }
nav a:hover, nav a:focus-visible { color: var(--blue); }
.nav-contact { padding: 12px 18px; border: 1px solid var(--ink); }

.hero { min-height: 730px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; padding-block: 64px 84px; }
.hero-company { display: grid; gap: 7px; margin: 0 0 27px; padding: 0 0 22px; border-bottom: 1px solid var(--line); }
.hero-company strong { font-size: clamp(27px, 2.6vw, 38px); letter-spacing: .05em; }
.hero-company span { color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .18em; }
.eyebrow { margin: 0 0 26px; display: flex; align-items: center; gap: 12px; font-size: 12px; font-weight: 700; letter-spacing: .2em; }
.eyebrow span { display: inline-block; width: 28px; height: 2px; background: var(--blue); }
.hero h1, .section-heading h2, .approach h2, .about h2, .contact h2 { margin: 0; letter-spacing: -.055em; line-height: 1.08; }
.hero h1 { font-size: clamp(58px, 6vw, 88px); }
.hero-intro { max-width: 590px; margin: 34px 0 0; font-size: 20px; line-height: 1.85; }
.hero-en { max-width: 540px; margin: 16px 0 0; color: var(--slate); font-size: 16px; line-height: 1.65; }
.hero-actions { display: flex; align-items: center; gap: 32px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 32px; min-height: 56px; padding: 0 24px; font-size: 16px; font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button-primary { background: var(--blue); color: white; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.text-link { padding-block: 12px; border-bottom: 1px solid var(--ink); font-size: 16px; font-weight: 700; }
.text-link span { margin-left: 18px; }

.hero-system { position: relative; height: 510px; overflow: hidden; border: 1px solid var(--line); background-color: rgba(255,255,255,.28); background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 44px 44px; }
.system-label { position: absolute; top: 18px; left: 20px; font: 700 9px/1 Arial; letter-spacing: .14em; }
.system-card { position: absolute; z-index: 2; width: 172px; padding: 13px 16px; border: 1px solid var(--ink); background: var(--paper); }
.system-card b { display: block; font-size: 10px; letter-spacing: .11em; }
.system-card span { display: block; margin-top: 6px; color: var(--slate); font-size: 11px; }
.card-a { top: 95px; left: 48px; }.card-b { top: 224px; right: 34px; }.card-c { bottom: 48px; left: 72px; }
.system-core { position: absolute; z-index: 3; left: 50%; top: 50%; width: 132px; height: 132px; display: grid; place-content: center; gap: 6px; transform: translate(-50%,-50%); background: var(--blue); color: white; box-shadow: 16px 16px 0 rgba(16,24,39,.12); }
.system-core span { font-size: 20px; font-weight: 700; }.system-core strong { font-size: 8px; letter-spacing: .18em; }
.node { position: absolute; z-index: 2; width: 12px; height: 12px; border: 2px solid var(--ink); border-radius: 50%; background: var(--paper); }
.node-a { top: 149px; left: 48%; }.node-b { bottom: 111px; right: 21%; }.node-c { top: 47%; left: 15%; }
.system-line { position: absolute; display: block; background: var(--ink); opacity: .75; }
.line-a { top: 154px; left: 36%; width: 34%; height: 1px; }.line-b { top: 49%; right: 0; width: 34%; height: 1px; }.line-c { bottom: 116px; left: 24%; width: 1px; height: 34%; }
.system-index { position: absolute; right: 18px; bottom: 10px; color: rgba(16,24,39,.14); font-size: 72px; font-weight: 800; }

.principles { border-block: 1px solid var(--line); background: var(--white); }
.principle-grid { min-height: 112px; display: grid; grid-template-columns: 1.15fr repeat(3, 1fr); align-items: center; }
.principle-grid > p { margin: 0; color: var(--slate); font-size: 14px; }
.principle-grid > div { display: grid; gap: 7px; padding-left: 28px; border-left: 1px solid var(--line); }
.principle-grid b { font-size: 18px; }.principle-grid span { color: var(--slate); font-size: 12px; letter-spacing: .06em; }

.section { padding-block: 128px; }
.section-heading { display: grid; grid-template-columns: 1fr 1.2fr .7fr; align-items: end; gap: 50px; margin-bottom: 70px; }
.section-heading .eyebrow { align-self: start; }
.section-heading h2, .about h2 { font-size: clamp(38px, 4vw, 56px); }
.section-heading > p:last-child { margin: 0; color: var(--slate); line-height: 1.8; font-size: 17px; }
.service-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); border-left: 1px solid var(--line); }
.service-card { position: relative; min-height: 280px; display: grid; grid-template-columns: 58px 1fr; gap: 8px; padding: 34px 34px 32px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.2); transition: background .2s ease, transform .2s ease; }
.service-card:hover { z-index: 1; background: var(--white); transform: translateY(-3px); }
.service-number { color: var(--blue); font-size: 11px; font-weight: 700; }
.service-card h3 { margin: 0; font-size: 28px; letter-spacing: -.02em; }
.service-card p { max-width: 360px; margin: 30px 0 0; color: var(--slate); font-size: 17px; line-height: 1.75; }
.service-card .service-en { margin: 8px 0 0; color: var(--ink); font-size: 12px; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.card-arrow { position: absolute; right: 30px; bottom: 28px; font-size: 20px; }

.approach { padding-block: 128px; background: var(--ink); color: white; }
.approach-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 120px; }
.eyebrow.light span { background: #7190ff; }
.approach h2 { font-size: clamp(48px, 5vw, 68px); }
.approach-copy > p:not(.eyebrow) { max-width: 480px; margin: 34px 0 0; color: #bac1cf; font-size: 18px; line-height: 1.85; }
.approach-copy .approach-en { font-size: 15px !important; line-height: 1.65 !important; }
.process-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.26); }
.process-list li { min-height: 118px; display: grid; grid-template-columns: 60px 1fr; gap: 12px; align-items: center; border-bottom: 1px solid rgba(255,255,255,.16); }
.process-list > li > span { color: #7190ff; font-size: 11px; font-weight: 700; }
.process-list h3 { margin: 0; font-size: 26px; }.process-list h3 small { margin-left: 12px; color: #8f99aa; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.process-list p { margin: 9px 0 0; color: #aeb6c5; font-size: 16px; }

.about { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }
.about-copy { padding-top: 43px; }
.about-copy > p { margin: 0 0 22px; font-size: 19px; line-height: 1.85; }
.about-copy .about-en { color: var(--slate); font-size: 15px; }

.contact { padding-block: 110px 100px; background: var(--blue); color: white; }
.contact h2 { font-size: clamp(58px, 7vw, 92px); }
.contact-intro { max-width: 540px; margin: 32px 0 0; font-size: 20px; line-height: 1.7; }
.contact-bottom { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: stretch; margin-top: 50px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.55); }
.contact-address { display: grid; align-content: start; gap: 12px; margin: 0; padding: 12px 0; font-style: normal; }
.contact-address span { font-size: 13px; font-weight: 700; letter-spacing: .1em; }
.contact-address strong { font-size: clamp(19px, 2vw, 25px); line-height: 1.45; letter-spacing: .01em; }
.contact-address small { opacity: .72; font-size: 12px; letter-spacing: .08em; }
.contact-email { display: grid; grid-template-columns: auto 1fr; gap: 6px 28px; align-items: baseline; padding: 12px 0; border-bottom: 2px solid rgba(255,255,255,.9); transition: border-color .2s ease, transform .2s ease; }
.contact-email:hover, .contact-email:focus-visible { border-color: var(--ink); transform: translateY(-2px); }
.contact-email span { font-size: 13px; letter-spacing: .1em; }.contact-email strong { justify-self: end; font-size: clamp(20px, 2.2vw, 27px); overflow-wrap: anywhere; }.contact-email small { grid-column: 2; justify-self: end; opacity: .72; font-size: 12px; letter-spacing: .08em; }

.footer { min-height: 160px; display: grid; grid-template-columns: 1.1fr .9fr 1.3fr; align-items: center; font-size: 13px; }
.footer > p:nth-child(2) { justify-self: center; }.footer > p:last-child { justify-self: end; }.footer > p:last-child span { margin-left: 28px; color: var(--slate); }
.footer-location { max-width: 360px; text-align: right; line-height: 1.55; }
.footer-brand { transform: scale(.78); transform-origin: left center; }

@media (max-width: 900px) {
  .shell { width: min(100% - 32px, 680px); }
  nav > a:not(.nav-contact) { display: none; }
  .hero { grid-template-columns: 1fr; gap: 42px; padding-block: 58px 70px; }
  .hero-system { height: 430px; }
  .principle-grid { grid-template-columns: 1fr; padding-block: 22px; }
  .principle-grid > p { display: none; }.principle-grid > div { padding: 16px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .principle-grid > div:last-child { border-bottom: 0; }
  .section { padding-block: 84px; }
  .section-heading { grid-template-columns: 1fr; gap: 22px; margin-bottom: 46px; }
  .service-grid { grid-template-columns: 1fr; }
  .approach { padding-block: 86px; }.approach-grid, .about { grid-template-columns: 1fr; gap: 60px; }
  .about-copy { padding-top: 0; }
}

@media (max-width: 560px) {
  .site-header { height: 100px; }.site-header nav { display: none; }.site-header .brand-mark { width: 44px; height: 44px; font-size: 22px; }.site-header .brand strong { font-size: 18px; }.site-header .brand small { font-size: 10px; letter-spacing: .06em; }.hero h1 { font-size: 48px; }
  .hero-company strong { font-size: 24px; letter-spacing: .02em; }.hero-company span { font-size: 11px; letter-spacing: .11em; }
  .hero-system { height: 360px; }.system-card { width: 138px; padding: 10px; }.card-a { left: 18px; top: 76px; }.card-b { right: 16px; top: 190px; }.card-c { left: 25px; bottom: 28px; }.system-core { width: 104px; height: 104px; }.system-index { font-size: 50px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 18px; }.button { width: 100%; }
  .service-card { min-height: 285px; grid-template-columns: 36px 1fr; padding: 28px 22px; }.service-card h3 { font-size: 24px; }
  .approach-grid { gap: 54px; }.process-list li { grid-template-columns: 42px 1fr; }.process-list h3 small { display: block; margin: 5px 0 0; }
  .contact-bottom { grid-template-columns: 1fr; gap: 34px; }.contact-address { padding-bottom: 30px; border-bottom: 1px solid rgba(255,255,255,.35); }.contact-email { grid-template-columns: 1fr; }.contact-email strong, .contact-email small { grid-column: 1; justify-self: start; }
  .footer { grid-template-columns: 1fr; gap: 12px; padding-block: 30px; }.footer > p:nth-child(2), .footer > p:last-child { justify-self: start; margin: 0; }
  .footer-location { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}