:root {
  --blue: #1f66f2;
  --blue-dark: #174fc0;
  --navy: #10233f;
  --text: #172238;
  --muted: #667085;
  --line: #dce2ea;
  --soft: #f4f7fb;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin-top: 0; }
.container { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.header__inner { min-height: 76px; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 12px; margin-right: auto; }
.brand__mark {
  width: 44px; height: 44px; display: grid; place-items: center;
  background: var(--blue); color: var(--white); font-size: 12px; font-weight: 800; letter-spacing: .08em;
}
.brand__text { display: grid; gap: 3px; }
.brand__text strong { color: var(--navy); font-size: 16px; letter-spacing: .12em; }
.brand__text small { color: #8993a4; font-size: 8px; letter-spacing: .08em; }
.nav { display: flex; gap: 34px; color: #3d4a60; font-size: 14px; }
.nav a, .footer a { transition: color .16s ease; }
.nav a:hover, .footer a:hover { color: var(--blue); }
.header__contact { padding: 11px 19px; border: 1px solid var(--navy); font-size: 14px; }
.header__contact:hover { color: var(--white); background: var(--navy); }
.mobile-menu { display: none; position: relative; }

.hero { padding: 84px 0 96px; border-bottom: 1px solid var(--line); }
.hero__grid { display: grid; grid-template-columns: 1.12fr .88fr; align-items: stretch; gap: 80px; }
.hero__content { padding: 54px 0 32px; }
.kicker, .section-index {
  margin-bottom: 24px; color: var(--blue); font-size: 12px; font-weight: 700; letter-spacing: .13em;
}
.hero h1 {
  margin-bottom: 30px; color: var(--navy); font-size: clamp(52px, 6vw, 82px);
  font-weight: 750; line-height: 1.12; letter-spacing: -.055em;
}
.hero h1 span { color: var(--blue); }
.hero__intro { max-width: 650px; margin-bottom: 40px; color: var(--muted); font-size: 18px; line-height: 1.9; }
.hero__actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.button { min-height: 50px; display: inline-flex; align-items: center; padding: 0 22px; font-size: 14px; font-weight: 650; }
.button--primary { color: var(--white); background: var(--blue); }
.button--primary:hover { background: var(--blue-dark); }
.button--text { padding-inline: 0; border-bottom: 1px solid var(--navy); }
.hero__panel { padding: 48px; color: var(--white); background: var(--navy); }
.hero__panel-label { margin-bottom: 50px; color: #9fb2ce; font-size: 12px; letter-spacing: .12em; }
.hero__panel-title { margin-bottom: 44px; font-size: 28px; font-weight: 650; line-height: 1.55; }
.hero__panel ol { margin: 0; padding: 0; list-style: none; border-top: 1px solid #40536e; }
.hero__panel li { display: grid; grid-template-columns: 42px 1fr; padding: 18px 0; border-bottom: 1px solid #40536e; color: #e5ebf4; font-size: 14px; }
.hero__panel li span { color: #78a4ff; font-size: 11px; }

.principle { padding: 88px 0; background: var(--soft); }
.principle__grid { display: grid; grid-template-columns: .46fr 1.12fr .72fr; gap: 64px; align-items: start; }
.principle h2 { margin: 0; color: var(--navy); font-size: 34px; line-height: 1.55; letter-spacing: -.025em; }
.principle__grid > p:last-child { margin: 3px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; }

.section { padding-top: 110px; padding-bottom: 110px; }
.section--soft { background: var(--soft); }
.section-heading { margin-bottom: 58px; }
.section-heading h2, .about h2, .contact h2 { margin-bottom: 16px; color: var(--navy); font-size: clamp(38px, 4.7vw, 58px); line-height: 1.2; letter-spacing: -.04em; }
.section-heading > p:last-child, .section-heading--split > p { max-width: 500px; margin-bottom: 0; color: var(--muted); font-size: 15px; line-height: 1.85; }
.section-heading--split { display: grid; grid-template-columns: 1.15fr .85fr; align-items: end; gap: 80px; }
.section-heading--split > div .section-index { margin-bottom: 18px; }
.section-heading--split > div h2 { margin-bottom: 0; }

.service-list { border-top: 1px solid var(--navy); }
.service-list article { display: grid; grid-template-columns: 80px .72fr 1.28fr; gap: 30px; align-items: center; min-height: 130px; border-bottom: 1px solid var(--line); }
.service-list article > span { color: var(--blue); font-size: 12px; font-weight: 700; }
.service-list h3 { margin: 0; color: var(--navy); font-size: 23px; }
.service-list p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.8; }

.capability-list { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--navy); }
.capability-list > div { display: grid; grid-template-columns: .65fr 1.35fr; gap: 28px; min-height: 118px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.capability-list > div:nth-child(odd) { padding-right: 44px; border-right: 1px solid var(--line); }
.capability-list > div:nth-child(even) { padding-left: 44px; }
.capability-list span { color: var(--navy); font-size: 18px; font-weight: 700; }
.capability-list p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.process { display: grid; grid-template-columns: repeat(6, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--navy); }
.process li { min-height: 176px; padding: 26px 20px 22px 0; border-bottom: 1px solid var(--line); }
.process li + li { padding-left: 20px; border-left: 1px solid var(--line); }
.process span { display: block; margin-bottom: 50px; color: var(--blue); font-size: 12px; font-weight: 700; }
.process strong { display: block; margin-bottom: 10px; color: var(--navy); font-size: 16px; }
.process p { margin: 0; color: var(--muted); font-size: 12px; }

.about { padding: 110px 0; color: var(--white); background: var(--navy); }
.about__grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; }
.section-index--light { color: #77a3ff; }
.about h2 { color: var(--white); }
.about__lead { max-width: 680px; margin-bottom: 32px; color: var(--white); font-size: 27px; font-weight: 600; line-height: 1.6; }
.about__content > p:not(.about__lead) { max-width: 760px; color: #b9c5d8; font-size: 15px; line-height: 2; }

.contact { padding: 104px 0; background: var(--white); }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }
.contact h2 { margin: 0; }
.contact__details > p { margin-bottom: 32px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.contact dl { margin: 0; border-top: 1px solid var(--navy); }
.contact dl div { display: flex; justify-content: space-between; gap: 30px; padding: 19px 0; border-bottom: 1px solid var(--line); }
.contact dt { color: var(--muted); font-size: 13px; }
.contact dd { margin: 0; color: var(--navy); font-size: 17px; font-weight: 650; }

.footer { padding-top: 52px; color: #b9c5d8; background: #0b192e; }
.footer__top { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding-bottom: 42px; }
.brand--footer { margin: 0; }
.brand--footer .brand__text strong { color: var(--white); }
.footer nav { display: flex; gap: 28px; font-size: 13px; }
.footer__bottom { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-top: 1px solid #35445b; color: #7f8da2; font-size: 12px; }

.legal { padding: 88px 0 110px; }
.legal__head { padding-bottom: 44px; border-bottom: 1px solid var(--navy); }
.legal__head h1 { margin-bottom: 18px; color: var(--navy); font-size: clamp(44px, 6vw, 68px); letter-spacing: -.04em; }
.legal__head > p:last-child { margin: 0; color: var(--muted); font-size: 13px; }
.legal__body { max-width: 800px; margin-left: auto; padding-top: 42px; }
.legal__body h2 { margin: 42px 0 14px; color: var(--navy); font-size: 20px; }
.legal__body p, .legal__body li { color: #49566a; font-size: 15px; line-height: 2; }
.legal__body a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 920px) {
  .nav, .header__contact { display: none; }
  .mobile-menu { display: block; }
  .mobile-menu summary { list-style: none; cursor: pointer; padding: 9px 14px; border: 1px solid var(--navy); font-size: 13px; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .mobile-menu nav { position: absolute; right: 0; top: calc(100% + 10px); width: 180px; display: grid; padding: 8px; background: var(--white); border: 1px solid var(--line); box-shadow: 0 18px 45px rgba(16, 35, 63, .12); }
  .mobile-menu nav a { padding: 11px; font-size: 14px; }
  .hero__grid, .principle__grid, .about__grid, .contact__grid { grid-template-columns: 1fr; }
  .hero__grid { gap: 42px; }
  .hero__content { padding-top: 22px; }
  .principle__grid { gap: 24px; }
  .section-heading--split { grid-template-columns: 1fr; gap: 24px; }
  .process { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 620px) {
  .container { width: min(100% - 32px, 1180px); }
  .header__inner { min-height: 68px; }
  .brand__mark { width: 38px; height: 38px; font-size: 10px; }
  .brand__text strong { font-size: 14px; }
  .hero { padding: 58px 0 68px; }
  .hero h1 { font-size: 48px; }
  .hero__intro { font-size: 16px; }
  .hero__actions { align-items: flex-start; flex-direction: column; }
  .hero__panel { padding: 30px 24px; }
  .principle { padding: 66px 0; }
  .principle h2 { font-size: 28px; }
  .section, .about, .contact { padding-top: 78px; padding-bottom: 78px; }
  .section-heading { margin-bottom: 42px; }
  .section-heading h2, .about h2, .contact h2 { font-size: 40px; }
  .service-list article { grid-template-columns: 40px 1fr; gap: 10px 14px; padding: 24px 0; }
  .service-list article p { grid-column: 2; }
  .capability-list { grid-template-columns: 1fr; }
  .capability-list > div, .capability-list > div:nth-child(odd), .capability-list > div:nth-child(even) { grid-template-columns: 1fr; gap: 12px; min-height: auto; padding: 24px 0; border-right: 0; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .process span { margin-bottom: 32px; }
  .about__grid, .contact__grid { gap: 42px; }
  .about__lead { font-size: 23px; }
  .footer__top, .footer__bottom { align-items: flex-start; flex-direction: column; }
  .footer__bottom { justify-content: center; padding: 18px 0; }
  .legal { padding: 64px 0 84px; }
}

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