:root {
  --navy-950: #061728;
  --navy-900: #081d31;
  --navy-800: #0d2c46;
  --navy-700: #164e78;
  --blue-500: #2e82b6;
  --gold-500: #cfa85f;
  --gold-300: #e4c784;
  --ink: #10283a;
  --text: #3d5362;
  --muted: #748593;
  --line: #dce4e9;
  --paper: #f5f7f9;
  --white: #fff;
  --content: 1180px;
  --header-height: 80px;
  --ease: cubic-bezier(.22, 1, .36, 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(--white);
  font-family: "Noto Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.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; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 999; padding: 10px 16px; background: var(--gold-500); color: var(--navy-950); font-weight: 700; transition: top .2s; }
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.12);
  transition: background .35s, box-shadow .35s, height .35s;
}
.site-header.is-scrolled { background: rgba(6,23,40,.94); box-shadow: 0 14px 38px rgba(0,0,0,.16); backdrop-filter: blur(16px); }
.header-inner { width: min(var(--content), calc(100% - 48px)); height: 100%; margin: auto; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; min-width: 0; }
.brand-logo { width: 168px; height: auto; }
.site-nav { display: flex; align-items: center; gap: 34px; font-size: 15px; }
.site-nav a { position: relative; padding: 27px 0 24px; color: rgba(255,255,255,.78); transition: color .2s; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 18px; height: 2px; background: var(--gold-500); transition: right .28s var(--ease); }
.site-nav a:hover, .site-nav a:focus-visible, .site-nav a.is-active { color: var(--white); }
.site-nav a:hover::after, .site-nav a:focus-visible::after, .site-nav a.is-active::after { right: 0; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; color: inherit; }
.menu-toggle > span:not(.sr-only) { display: block; height: 2px; margin: 5px 0; background: currentColor; transition: transform .25s, opacity .25s; }

.hero { position: relative; min-height: 820px; height: 100svh; max-height: 980px; overflow: hidden; background: var(--navy-950); color: var(--white); }
.hero-image, .hero-shade, .hero-grid { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-image { object-fit: cover; object-position: center; }
.hero-shade { background: linear-gradient(90deg, rgba(4,18,31,.98) 0%, rgba(4,18,31,.88) 37%, rgba(4,18,31,.32) 70%, rgba(4,18,31,.38) 100%), linear-gradient(0deg, rgba(4,18,31,.55), transparent 50%); }
.hero-grid { opacity: .14; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 88px 88px; mask-image: linear-gradient(90deg, #000, transparent 65%); }
.hero-content { position: relative; z-index: 2; width: min(var(--content), calc(100% - 48px)); margin: auto; padding-top: clamp(170px, 22vh, 230px); }
.eyebrow, .section-index { margin: 0 0 24px; color: var(--gold-500); font-size: 13px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 14px; }
.eyebrow::before { content: ""; width: 42px; height: 2px; background: var(--gold-500); }
.hero h1 { max-width: 700px; margin: 0; font-size: clamp(58px, 7.2vw, 96px); line-height: 1.05; letter-spacing: -.04em; }
.hero-lead { max-width: 690px; margin: 32px 0 0; color: rgba(255,255,255,.76); font-size: clamp(18px, 1.5vw, 22px); line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }
.button { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 0 26px; border: 1px solid transparent; font-size: 15px; font-weight: 700; letter-spacing: .03em; transition: transform .25s var(--ease), background .25s, color .25s, border-color .25s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--gold-500); color: var(--navy-950); }
.button-primary:hover { background: var(--gold-300); }
.button-ghost { border-color: rgba(255,255,255,.38); color: var(--white); }
.button-ghost:hover { border-color: var(--white); background: rgba(255,255,255,.08); }
.hero-metrics { position: absolute; z-index: 3; right: max(24px, calc((100% - var(--content))/2)); bottom: 52px; display: grid; grid-template-columns: repeat(4, auto); padding: 24px 0; background: rgba(5,22,37,.74); border: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(16px); }
.hero-metrics div { min-width: 148px; padding: 0 25px; border-right: 1px solid rgba(255,255,255,.16); }
.hero-metrics div:last-child { border-right: 0; }
.hero-metrics strong, .hero-metrics span { display: block; }
.hero-metrics strong { color: var(--white); font-size: 23px; line-height: 1.2; }
.hero-metrics span { margin-top: 8px; color: rgba(255,255,255,.57); font-size: 12px; }
.scroll-cue { position: absolute; z-index: 3; left: max(24px, calc((100% - var(--content))/2)); bottom: 57px; display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,.55); font-size: 12px; letter-spacing: .12em; }
.scroll-cue span { width: 34px; height: 1px; background: var(--gold-500); }

.section { padding: 124px 0; }
.section-inner { width: min(var(--content), calc(100% - 48px)); margin: auto; }
.section-light { background: var(--paper); }
.section-ink { position: relative; overflow: hidden; background: var(--navy-950); color: var(--white); }
.section-ink::before { content: ""; position: absolute; width: 620px; height: 620px; right: -220px; top: -260px; border: 1px solid rgba(255,255,255,.06); border-radius: 50%; box-shadow: 0 0 0 90px rgba(255,255,255,.025), 0 0 0 180px rgba(255,255,255,.018); }
.section-heading { max-width: 440px; }
.section-heading-wide { max-width: 900px; margin-bottom: 70px; }
.section-heading h2, .property-content h2, .capability-copy h2, .credentials-copy h2, .closing h2 { margin: 0; font-size: clamp(38px, 4.3vw, 62px); line-height: 1.15; letter-spacing: -.035em; }
.section-heading > p:last-child, .section-heading-wide > p:last-child { margin: 20px 0 0; color: var(--muted); font-size: 18px; }
.section-ink .section-heading > p:last-child { color: rgba(255,255,255,.64); }

.about-layout { display: grid; grid-template-columns: .8fr 1.35fr; gap: 100px; align-items: start; }
.about-copy { max-width: 690px; }
.about-copy p { margin: 0 0 25px; color: var(--text); font-size: 17px; }
.about-copy .lead-copy { color: var(--ink); font-size: 24px; line-height: 1.75; }
.operator-line { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 48px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.operator-line span { padding: 21px 12px; border-right: 1px solid var(--line); color: var(--navy-700); font-weight: 700; text-align: center; }
.operator-line span:last-child { border-right: 0; }

.service-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 72px; }
.service-item { display: grid; grid-template-columns: 62px 1fr; gap: 18px; min-height: 170px; padding: 34px 0; border-top: 1px solid rgba(255,255,255,.15); }
.service-number { padding-top: 6px; color: var(--gold-500); font-size: 14px; font-weight: 700; }
.service-item h3 { margin: 0 0 12px; font-size: 27px; line-height: 1.3; }
.service-item p { margin: 0; color: rgba(255,255,255,.63); font-size: 16px; }

.property { display: grid; grid-template-columns: 1.05fr .95fr; min-height: 800px; background: var(--navy-900); color: var(--white); }
.property-visual { position: relative; min-height: 620px; overflow: hidden; }
.property-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 58%, var(--navy-900)), linear-gradient(0deg, rgba(8,29,49,.5), transparent 45%); }
.property-visual img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.property-content { display: flex; flex-direction: column; justify-content: center; padding: 100px max(48px, calc((100vw - var(--content))/2)) 100px 78px; }
.property-lead { margin: 28px 0 34px; color: rgba(255,255,255,.68); font-size: 18px; }
.scenario-list { margin: 0; padding: 0; list-style: none; }
.scenario-list li { display: grid; grid-template-columns: 170px 1fr; gap: 24px; padding: 19px 0; border-bottom: 1px solid rgba(255,255,255,.15); }
.scenario-list strong { color: var(--gold-300); }
.scenario-list span { color: rgba(255,255,255,.7); }

.process-section { overflow: hidden; }
.process-list { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 38px; margin: 0; padding: 18px 0 0; list-style: none; }
.process-list::before { content: ""; position: absolute; top: 47px; left: 30px; right: 30px; height: 2px; background: var(--line); }
.process-list li { position: relative; padding-top: 85px; }
.process-list li > span { position: absolute; top: 23px; left: 0; display: grid; width: 50px; height: 50px; place-items: center; border-radius: 50%; background: var(--navy-950); color: var(--white); font-weight: 700; box-shadow: 0 0 0 12px var(--paper); }
.process-list h3 { margin: 0 0 14px; font-size: 24px; }
.process-list p { margin: 0; color: var(--text); }

.capability-section { padding: 0; background: var(--white); }
.capability-layout { display: grid; grid-template-columns: 1fr .86fr; min-height: 720px; }
.capability-copy { align-self: center; padding: 100px 90px 100px 0; }
.capability-copy > p:not(.section-index) { color: var(--text); font-size: 18px; }
.capability-points { margin: 44px 0 0; }
.capability-points div { display: grid; grid-template-columns: 150px 1fr; gap: 24px; padding: 20px 0; border-top: 1px solid var(--line); }
.capability-points dt { color: var(--navy-700); font-weight: 700; }
.capability-points dd { margin: 0; color: var(--text); }
.platform-panel { display: flex; flex-direction: column; justify-content: center; margin-right: calc((100vw - var(--content))/-2); padding: 110px max(48px, calc((100vw - var(--content))/2)) 110px 82px; background: var(--navy-950); color: var(--white); }
.panel-kicker { margin: 0 0 18px; color: var(--gold-500); font-size: 13px; font-weight: 700; letter-spacing: .14em; }
.platform-panel h3 { max-width: 500px; margin: 0; font-size: clamp(34px, 3.8vw, 54px); line-height: 1.2; }
.platform-panel > p:last-child { color: rgba(255,255,255,.65); }
.platform-list { display: flex; flex-direction: column; margin: 42px 0 32px; border-top: 1px solid rgba(255,255,255,.14); }
.platform-list span { padding: 17px 0; border-bottom: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.86); }

.cooperation-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 72px; }
.cooperation-item { display: grid; grid-template-columns: 64px 1fr; padding: 34px 0 38px; border-top: 1px solid rgba(255,255,255,.15); }
.cooperation-item span { grid-row: 1 / 3; color: var(--gold-500); font-size: 15px; font-weight: 700; }
.cooperation-item h3 { margin: 0 0 13px; font-size: 26px; }
.cooperation-item p { margin: 0; color: rgba(255,255,255,.64); }

.credentials-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 88px; align-items: start; }
.trust-list { margin-top: 54px; }
.trust-list div { padding: 23px 0; border-top: 1px solid var(--line); }
.trust-list span, .trust-list strong { display: block; }
.trust-list span { margin-bottom: 6px; color: var(--gold-500); font-size: 13px; font-weight: 700; letter-spacing: .12em; }
.trust-list strong { font-size: 22px; }
.credential-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.credential-gallery figure { position: relative; min-height: 190px; margin: 0; overflow: hidden; background: var(--white); box-shadow: 0 18px 42px rgba(9,29,47,.1); }
.credential-gallery img { width: 100%; height: 100%; min-height: 190px; object-fit: cover; }
.credential-gallery figcaption { position: absolute; inset: auto 0 0; padding: 24px 16px 12px; color: var(--white); font-size: 13px; background: linear-gradient(transparent, rgba(3,15,27,.86)); }
.credential-main { grid-column: 1 / -1; aspect-ratio: 1076 / 760; }
.partners { display: grid; grid-template-columns: 130px 1fr; gap: 34px; margin-top: 76px; padding-top: 32px; border-top: 1px solid var(--line); }
.partners p { margin: 0; color: var(--gold-500); font-weight: 700; }
.partners div { color: var(--text); word-spacing: .28em; }

.closing { position: relative; min-height: 550px; display: grid; place-items: center; overflow: hidden; background: radial-gradient(circle at 78% 35%, rgba(50,130,180,.28), transparent 34%), linear-gradient(120deg, var(--navy-950), var(--navy-800)); color: var(--white); text-align: center; }
.closing::before, .closing::after { content: ""; position: absolute; border: 1px solid rgba(255,255,255,.08); border-radius: 50%; }
.closing::before { width: 560px; height: 560px; right: -160px; top: -260px; box-shadow: 0 0 0 90px rgba(255,255,255,.02), 0 0 0 180px rgba(255,255,255,.015); }
.closing::after { width: 300px; height: 300px; left: -120px; bottom: -180px; }
.closing-content { position: relative; z-index: 1; width: min(760px, calc(100% - 48px)); }
.closing-content > p:not(.section-index) { margin: 24px 0 36px; color: rgba(255,255,255,.68); font-size: 19px; }

.site-footer { display: grid; grid-template-columns: 1fr auto; gap: 42px; align-items: center; padding: 58px max(24px, calc((100% - var(--content))/2)); background: #04121f; color: rgba(255,255,255,.68); }
.footer-brand { color: var(--white); }
.site-footer > div > p { margin: 16px 0 0; font-size: 13px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 25px; font-size: 14px; }
.footer-brand .brand-logo { width: 180px; }
.site-footer nav a:hover { color: var(--white); }
.copyright { grid-column: 1 / -1; margin: 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: 12px; }

.back-top { position: fixed; right: 24px; bottom: 24px; z-index: 90; width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; background: rgba(6,23,40,.9); color: var(--white); font-size: 20px; opacity: 0; pointer-events: none; transform: translateY(12px); transition: opacity .25s, transform .25s, background .25s; }
.back-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { background: var(--gold-500); color: var(--navy-950); }

.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  :root { --header-height: 72px; }
  .site-nav { gap: 20px; }
  .hero-metrics { right: 24px; }
  .hero-metrics div { min-width: 132px; padding: 0 18px; }
  .scroll-cue { display: none; }
  .property { grid-template-columns: 1fr; }
  .property-visual { min-height: 560px; }
  .property-visual::after { background: linear-gradient(0deg, var(--navy-900), transparent 48%); }
  .property-content { padding: 88px 48px 100px; }
  .capability-layout { grid-template-columns: 1fr; }
  .capability-copy { padding: 100px 0; }
  .platform-panel { margin: 0 calc((100vw - 100%)/-2); padding: 90px max(48px, calc((100vw - var(--content))/2)); }
}

@media (max-width: 820px) {
  .header-inner { width: min(100% - 32px, var(--content)); }
  .menu-toggle { display: block; z-index: 102; }
  .menu-toggle[aria-expanded="true"] > span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] > span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 0; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 12px; padding: 110px 36px 50px; background: rgba(5,20,34,.98); opacity: 0; visibility: hidden; transform: translateY(-10px); transition: opacity .25s, visibility .25s, transform .25s; }
  .site-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .site-nav a { width: 100%; padding: 12px 0; font-size: 28px; }
  .site-nav a::after { display: none; }
  .hero { min-height: 760px; height: 100svh; max-height: none; }
  .hero-content { padding-top: clamp(150px, 21vh, 190px); }
  .hero h1 { font-size: clamp(48px, 13vw, 72px); }
  .hero-lead { max-width: 570px; font-size: 17px; }
  .hero-metrics { left: 24px; right: 24px; bottom: 28px; grid-template-columns: 1fr 1fr; }
  .hero-metrics div { padding: 12px 20px; border-right: 1px solid rgba(255,255,255,.14); }
  .hero-metrics div:nth-child(2) { border-right: 0; }
  .hero-metrics div:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.14); }
  .hero-metrics strong { font-size: 20px; }
  .hero-metrics span { margin-top: 4px; }
  .section { padding: 92px 0; }
  .section-inner { width: min(100% - 36px, var(--content)); }
  .about-layout, .credentials-layout { grid-template-columns: 1fr; gap: 48px; }
  .service-list, .cooperation-grid { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: 1fr 1fr; gap: 38px 24px; }
  .process-list::before { display: none; }
  .process-list li { padding-top: 72px; }
  .process-list li > span { top: 8px; box-shadow: none; }
  .credential-gallery { margin-top: 12px; }
}

@media (max-width: 560px) {
  .brand-logo { width: 148px; }
  .hero { min-height: 820px; }
  .hero-image { object-position: 63% center; }
  .hero-shade { background: linear-gradient(180deg, rgba(4,18,31,.88), rgba(4,18,31,.77) 50%, rgba(4,18,31,.95)); }
  .hero-content { width: calc(100% - 36px); padding-top: 145px; }
  .eyebrow { font-size: 11px; letter-spacing: .12em; }
  .hero h1 { font-size: 50px; line-height: 1.08; }
  .hero-lead { margin-top: 24px; line-height: 1.72; }
  .hero-actions { margin-top: 30px; }
  .button { width: 100%; }
  .hero-metrics { left: 18px; right: 18px; bottom: 22px; padding: 8px 0; }
  .hero-metrics div { min-width: 0; padding: 10px 14px; }
  .hero-metrics strong { font-size: 18px; }
  .hero-metrics span { font-size: 10px; }
  .section { padding: 76px 0; }
  .section-heading h2, .property-content h2, .capability-copy h2, .credentials-copy h2, .closing h2 { font-size: 37px; }
  .section-heading-wide { margin-bottom: 48px; }
  .about-copy .lead-copy { font-size: 20px; }
  .operator-line { grid-template-columns: 1fr 1fr; }
  .operator-line span:nth-child(2) { border-right: 0; }
  .operator-line span:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .service-item { grid-template-columns: 46px 1fr; min-height: auto; padding: 28px 0; }
  .service-item h3, .cooperation-item h3 { font-size: 23px; }
  .property-visual { min-height: 390px; }
  .property-content { padding: 70px 18px 78px; }
  .scenario-list li { grid-template-columns: 1fr; gap: 2px; }
  .process-list { grid-template-columns: 1fr; }
  .capability-copy { padding: 76px 0; }
  .capability-points div { grid-template-columns: 1fr; gap: 4px; }
  .platform-panel { margin: 0 -18px; padding: 74px 18px; }
  .cooperation-item { grid-template-columns: 46px 1fr; }
  .credential-gallery { grid-template-columns: 1fr; }
  .credential-gallery figure { min-height: 230px; }
  .partners { grid-template-columns: 1fr; gap: 8px; margin-top: 54px; }
  .closing { min-height: 480px; }
  .site-footer { grid-template-columns: 1fr; padding: 48px 18px; }
  .site-footer nav { gap: 12px 20px; }
}

@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 { opacity: 1; transform: none; }
}