:root {
  --ink: #17211d;
  --muted: #5f6c66;
  --green: #0b5c45;
  --green-dark: #073d30;
  --mint: #dff2e9;
  --coral: #ef795d;
  --paper: #f5f7f5;
  --white: #ffffff;
  --line: #dce4df;
  --shadow: 0 18px 45px rgba(23, 33, 29, 0.12);
  --container: min(1180px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.7;
  letter-spacing: 0;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
.container { width: var(--container); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.18);
  transition: background .25s ease, color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled,
.site-header.light-header {
  color: var(--ink);
  background: rgba(255,255,255,.96);
  box-shadow: 0 8px 30px rgba(16,42,32,.08);
  border-bottom-color: var(--line);
  backdrop-filter: blur(12px);
}
.header-inner { height: 78px; display: flex; align-items: center; gap: 38px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand img { width: 42px; height: 42px; }
.brand-text { line-height: 1.18; }
.brand-text strong { display: block; font-size: 18px; font-weight: 800; }
.brand-text small { display: block; font-size: 10px; opacity: .68; text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.main-nav a { position: relative; font-size: 15px; font-weight: 600; white-space: nowrap; }
.main-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -9px; height: 2px; background: var(--coral); transition: right .2s ease; }
.main-nav a:hover::after, .main-nav a.active::after { right: 0; }
.header-phone { display: inline-flex; align-items: center; gap: 8px; padding: 10px 15px; border: 1px solid currentColor; font-size: 14px; font-weight: 700; }
.header-phone:hover { color: var(--white); background: var(--green); border-color: var(--green); }
.menu-button { display: none; width: 44px; height: 44px; border: 0; color: inherit; background: transparent; align-items: center; justify-content: center; cursor: pointer; }

.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: flex-end;
  color: var(--white);
  background: url("images/team-collaboration.jpg") center 42% / cover no-repeat;
}
.hero::before { content: ""; position: absolute; inset: 0; background: rgba(3, 18, 13, .66); }
.hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 9px; background: var(--coral); }
.hero-inner { position: relative; z-index: 1; padding: 160px 0 90px; display: grid; grid-template-columns: minmax(0, 760px) 1fr; gap: 80px; align-items: end; }
.hero h1 { margin: 0 0 22px; max-width: 760px; font-size: clamp(44px, 5.7vw, 78px); line-height: 1.08; font-weight: 800; }
.hero h1 span { color: #aee6d1; }
.hero-lead { max-width: 680px; margin: 0 0 34px; font-size: 19px; line-height: 1.85; color: rgba(255,255,255,.88); }
.actions { display: flex; flex-wrap: wrap; gap: 14px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 12px 22px; border: 1px solid transparent; font-size: 15px; font-weight: 700; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--coral); color: #23130f; }
.button-primary:hover { background: #ff9075; }
.button-outline { color: var(--white); border-color: rgba(255,255,255,.65); }
.button-outline:hover { color: var(--ink); background: var(--white); }
.button-green { color: var(--white); background: var(--green); }
.button-green:hover { background: var(--green-dark); }
.hero-aside { padding-left: 24px; border-left: 1px solid rgba(255,255,255,.35); }
.hero-aside p { margin: 0 0 9px; color: rgba(255,255,255,.68); font-size: 13px; }
.hero-aside strong { display: block; font-size: 18px; line-height: 1.5; }

.section { padding: 104px 0; }
.section-soft { background: var(--paper); }
.section-dark { color: var(--white); background: var(--green-dark); }
.section-head { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); align-items: end; gap: 60px; margin-bottom: 48px; }
.section-label { margin: 0 0 15px; color: var(--green); font-size: 13px; font-weight: 800; }
.section-dark .section-label { color: #9fe2c7; }
h2 { margin: 0; font-size: clamp(32px, 4vw, 50px); line-height: 1.2; }
.section-head > p { margin: 0; color: var(--muted); font-size: 17px; }
.section-dark .section-head > p { color: rgba(255,255,255,.7); }

.services-list { border-top: 1px solid var(--line); }
.service-row { display: grid; grid-template-columns: 70px 1.15fr 1fr 48px; align-items: center; gap: 30px; min-height: 142px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.service-row > span { color: var(--green); font-size: 13px; font-weight: 800; }
.service-row h3 { margin: 0; font-size: 25px; line-height: 1.3; }
.service-row p { margin: 0; color: var(--muted); }
.service-row .arrow { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--line); color: var(--green); transition: .2s ease; }
.service-row:hover .arrow { color: var(--white); background: var(--green); border-color: var(--green); transform: translateX(4px); }

.proof-band { display: grid; grid-template-columns: 1.1fr .9fr; min-height: 560px; }
.proof-photo { min-height: 480px; background: url("images/strategy-workshop.jpg") center / cover no-repeat; }
.proof-copy { display: flex; align-items: center; background: var(--green); color: var(--white); }
.proof-copy-inner { max-width: 620px; padding: 72px 8vw 72px 70px; }
.proof-copy .section-label { color: #b8ead7; }
.proof-copy h2 { margin-bottom: 26px; }
.proof-copy p { color: rgba(255,255,255,.78); font-size: 17px; }
.principles { margin: 34px 0 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.24); }
.principles li { display: grid; grid-template-columns: 35px 1fr; gap: 14px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.24); }
.principles b { color: #b8ead7; }

.focus-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.focus-card { position: relative; min-height: 320px; padding: 28px; overflow: hidden; color: var(--white); background: var(--green-dark); }
.focus-card:nth-child(2) { background: var(--green); }
.focus-card:nth-child(3) { color: var(--ink); background: var(--mint); }
.focus-card .icon-box { width: 48px; height: 48px; display: grid; place-items: center; border: 1px solid currentColor; margin-bottom: 64px; }
.focus-card h3 { margin: 0 0 14px; font-size: 26px; }
.focus-card p { margin: 0; opacity: .78; }
.focus-card a { position: absolute; left: 28px; bottom: 28px; font-weight: 700; }

.process { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.24); }
.process article { min-height: 260px; padding: 28px; border-right: 1px solid rgba(255,255,255,.24); }
.process article:last-child { border-right: 0; }
.process span { color: #9fe2c7; font-size: 13px; font-weight: 800; }
.process h3 { margin: 48px 0 12px; font-size: 22px; }
.process p { margin: 0; color: rgba(255,255,255,.68); }

.cta-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 40px; padding: 54px 0; }
.cta-band h2 { font-size: clamp(29px, 3.4vw, 44px); }
.cta-band p { margin: 10px 0 0; color: var(--muted); }
.cta-actions { display: flex; gap: 12px; }

.site-footer { padding: 64px 0 28px; color: rgba(255,255,255,.74); background: #101814; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .7fr .7fr .9fr; gap: 50px; }
.site-footer .brand { color: var(--white); }
.footer-intro { max-width: 370px; margin: 20px 0 0; }
.footer-col strong { display: block; margin-bottom: 17px; color: var(--white); }
.footer-col a, .footer-col span { display: block; margin: 8px 0; }
.footer-col a:hover { color: #9fe2c7; }
.copyright { margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.14); display: flex; justify-content: space-between; gap: 20px; font-size: 13px; }

.page-hero { min-height: 510px; padding: 170px 0 85px; color: var(--white); background: var(--green-dark); }
.page-hero.server { position: relative; background: url("images/ai-infrastructure.jpg") center / cover no-repeat; }
.page-hero.server::before { content: ""; position: absolute; inset: 0; background: rgba(3,18,13,.62); }
.page-hero.server .container { position: relative; z-index: 1; }
.page-hero h1 { max-width: 850px; margin: 0 0 22px; font-size: clamp(42px, 5.2vw, 68px); line-height: 1.12; }
.page-hero p { max-width: 720px; margin: 0; color: rgba(255,255,255,.75); font-size: 19px; }
.page-hero .bread { margin-bottom: 46px; color: #aee6d1; font-size: 13px; font-weight: 700; }
.content-split { display: grid; grid-template-columns: .72fr 1.28fr; gap: 80px; }
.content-split aside { position: sticky; top: 120px; align-self: start; }
.content-split aside h2 { font-size: 34px; }
.content-split aside p { color: var(--muted); }
.detail-list { border-top: 1px solid var(--line); }
.detail-item { display: grid; grid-template-columns: 55px 1fr; gap: 25px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.detail-item > span { width: 45px; height: 45px; display: grid; place-items: center; color: var(--green); background: var(--mint); font-weight: 800; }
.detail-item h3 { margin: 0 0 9px; font-size: 24px; }
.detail-item p { margin: 0; color: var(--muted); }
.deliverables { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 48px; }
.deliverable { padding: 28px; border: 1px solid var(--line); }
.deliverable i { width: 42px; height: 42px; display: grid; place-items: center; color: var(--green); background: var(--mint); font-style: normal; }
.deliverable h3 { margin: 25px 0 9px; font-size: 21px; }
.deliverable p { margin: 0; color: var(--muted); }
.geo-table { width: 100%; border-collapse: collapse; margin-top: 42px; }
.geo-table th, .geo-table td { padding: 20px; text-align: left; border: 1px solid var(--line); vertical-align: top; }
.geo-table th { color: var(--white); background: var(--green); }
.geo-table td:first-child { width: 25%; font-weight: 700; }
.server-options { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.server-option { padding: 30px; border: 1px solid var(--line); }
.server-option .icon-box { color: var(--green); }
.server-option h3 { margin: 28px 0 12px; font-size: 24px; }
.server-option p { margin: 0 0 20px; color: var(--muted); }
.server-option ul { padding-left: 18px; color: var(--muted); }
.server-option li { margin: 7px 0; }
.about-photo { aspect-ratio: 16 / 8; object-fit: cover; margin-top: 48px; }
.values { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.value { padding: 30px 0; border-top: 3px solid var(--green); }
.value h3 { margin: 0 0 12px; font-size: 24px; }
.value p { margin: 0; color: var(--muted); }
.contact-strip { display: none; position: fixed; z-index: 90; right: 22px; bottom: 22px; }
.contact-strip a { display: inline-flex; align-items: center; gap: 8px; min-height: 48px; padding: 10px 17px; color: var(--white); background: var(--coral); box-shadow: var(--shadow); font-weight: 800; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

@media (max-width: 980px) {
  :root { --container: min(100% - 36px, 760px); }
  .header-inner { height: 70px; }
  .menu-button { display: flex; margin-left: auto; }
  .header-phone { display: none; }
  .main-nav { position: fixed; inset: 70px 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 18px 24px; color: var(--ink); background: var(--white); box-shadow: 0 20px 30px rgba(0,0,0,.12); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .main-nav a::after { display: none; }
  .hero { min-height: 760px; }
  .hero-inner { grid-template-columns: 1fr; gap: 46px; padding: 140px 0 70px; }
  .hero-aside { max-width: 400px; }
  .section { padding: 82px 0; }
  .section-head { grid-template-columns: 1fr; gap: 22px; }
  .service-row { grid-template-columns: 52px 1fr 40px; gap: 18px; }
  .service-row p { grid-column: 2 / 4; }
  .proof-band { grid-template-columns: 1fr; }
  .proof-copy-inner { max-width: 760px; width: var(--container); margin-inline: auto; padding: 70px 0; }
  .focus-grid { grid-template-columns: 1fr; }
  .focus-card { min-height: 285px; }
  .process { grid-template-columns: repeat(2,1fr); }
  .process article:nth-child(2) { border-right: 0; }
  .process article { border-bottom: 1px solid rgba(255,255,255,.24); }
  .content-split { grid-template-columns: 1fr; gap: 46px; }
  .content-split aside { position: static; }
  .server-options { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  :root { --container: calc(100% - 30px); }
  .brand-text strong { font-size: 16px; }
  .brand-text small { display: none; }
  .hero { min-height: 720px; background-position: 58% center; }
  .hero h1 { font-size: 43px; }
  .hero-lead { font-size: 17px; }
  .hero-aside { display: none; }
  .button { width: 100%; }
  .section { padding: 66px 0; }
  h2 { font-size: 33px; }
  .service-row { grid-template-columns: 38px 1fr 34px; gap: 12px; min-height: 0; padding: 26px 0; }
  .service-row h3 { font-size: 21px; }
  .service-row .arrow { width: 34px; height: 34px; }
  .proof-photo { min-height: 350px; }
  .proof-copy-inner { padding: 58px 0; }
  .process { grid-template-columns: 1fr; }
  .process article { border-right: 0; min-height: 220px; }
  .cta-band { grid-template-columns: 1fr; }
  .cta-actions { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 38px 26px; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .copyright { flex-direction: column; }
  .page-hero { min-height: 460px; padding: 140px 0 65px; }
  .page-hero h1 { font-size: 42px; }
  .deliverables, .values { grid-template-columns: 1fr; }
  .geo-table { display: block; overflow-x: auto; white-space: nowrap; }
  .contact-strip { display: block; left: 15px; right: 15px; bottom: 15px; }
  .contact-strip a { width: 100%; justify-content: center; }
  .site-footer { padding-bottom: 90px; }
}