:root {
  --ink: #092334;
  --ink-soft: #17384a;
  --paper: #f4f0e8;
  --white: #ffffff;
  --green: #527861;
  --gold: #c2833c;
  --line: rgba(9, 35, 52, 0.16);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
:focus-visible { outline: 3px solid #e2ad6f; outline-offset: 4px; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 12px; padding: 10px 14px; color: var(--white); background: var(--ink); transform: translateY(-160%); transition: transform .18s ease; }
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: 76px;
  padding: 10px max(24px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(244, 240, 232, 0.93);
  border-bottom: 1px solid rgba(9, 35, 52, 0.1);
  backdrop-filter: blur(14px);
}
.brand img { display: block; width: 104px; height: 54px; object-fit: contain; }
.nav { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 600; }
.nav a:hover { color: var(--gold); }
.nav-cta { padding: 12px 20px; color: var(--white) !important; background: var(--ink); }
.mobile-section-nav { display: none; }

.hero {
  position: relative;
  min-height: 760px;
  height: 100vh;
  overflow: hidden;
  color: var(--white);
  display: flex;
  align-items: center;
}
.hero-image, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-image { object-fit: cover; }
.hero-shade { background: linear-gradient(90deg, rgba(3, 20, 31, 0.94) 0%, rgba(3, 20, 31, 0.68) 45%, rgba(3, 20, 31, 0.16) 78%); }
.hero-content { position: relative; z-index: 2; width: min(760px, 100%); margin-left: max(24px, calc((100vw - var(--max)) / 2)); padding: 120px 24px 80px 0; }
.eyebrow { margin: 0 0 26px; color: #e2ad6f; font-size: 13px; font-weight: 700; letter-spacing: 0.18em; }
.hero h1 { margin: 0; font-family: "Noto Serif SC", "Songti SC", serif; font-size: clamp(64px, 8vw, 116px); line-height: 0.98; font-weight: 700; letter-spacing: -0.04em; }
.hero-lead { max-width: 640px; margin: 32px 0 0; font-size: clamp(18px, 2vw, 24px); line-height: 1.75; color: rgba(255,255,255,.86); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }
.button { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 0 24px; font-size: 15px; font-weight: 700; transition: .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--gold); color: #081b27; }
.button-secondary { border: 1px solid rgba(255,255,255,.45); background: rgba(9,35,52,.38); color: var(--white); }
.hero-note { position: absolute; z-index: 2; right: max(24px, calc((100vw - var(--max)) / 2)); bottom: 48px; padding-left: 22px; border-left: 3px solid var(--gold); display: grid; gap: 6px; text-align: left; }
.hero-note span { color: #e2ad6f; font-size: 13px; }
.hero-note strong { font-size: 16px; }

.section { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; padding: 112px 0; scroll-margin-top: 76px; }
.section-kicker { margin: 0 0 20px; color: var(--gold); font-size: 12px; font-weight: 800; letter-spacing: .2em; }
.section-kicker-light { color: #e2ad6f; }
h2 { margin: 0; font-family: "Noto Serif SC", "Songti SC", serif; font-size: clamp(38px, 5vw, 66px); line-height: 1.22; letter-spacing: -.035em; }
.intro-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 9vw; align-items: start; }
.intro-copy { padding-top: 10px; color: #49606d; font-size: 16px; line-height: 1.9; }
.intro-copy .lead { margin-top: 0; color: var(--ink); font-size: 22px; line-height: 1.65; }
.bridge { margin-top: 72px; padding: 0; display: grid; grid-template-columns: 1fr auto 1.15fr auto 1fr; align-items: stretch; border: 1px solid var(--line); background: rgba(255,255,255,.5); }
.bridge > div:not(.bridge-arrow) { min-height: 176px; padding: 28px; display: flex; flex-direction: column; justify-content: center; }
.bridge .bridge-core { color: var(--white); background: var(--green); }
.bridge small { color: var(--gold); font-size: 11px; font-weight: 800; letter-spacing: .18em; }
.bridge strong { margin: 10px 0 12px; font-size: 22px; }
.bridge span { color: #61727b; font-size: 14px; line-height: 1.6; }
.bridge-core span { color: rgba(255,255,255,.8); }
.bridge-arrow { display: flex; align-items: center; color: var(--gold); font-size: 26px; }

.market { display: grid; grid-template-columns: 1fr 1fr; color: var(--white); background: var(--ink); }
.market-media { min-height: 720px; overflow: hidden; }
.market-media img { width: 100%; height: 100%; object-fit: cover; }
.market-copy { padding: 100px max(32px, calc((100vw - var(--max)) / 2)); padding-left: clamp(48px, 6vw, 96px); display: flex; flex-direction: column; justify-content: center; }
.market-copy h2 { font-size: clamp(38px, 4vw, 58px); }
.market-copy > p:not(.section-kicker) { max-width: 600px; margin: 30px 0 0; color: rgba(255,255,255,.72); font-size: 17px; line-height: 1.85; }
.metrics { margin-top: 50px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.metrics div { padding-top: 18px; border-top: 2px solid var(--gold); display: grid; gap: 9px; }
.metrics strong { color: #e2ad6f; font-family: Georgia, serif; font-size: clamp(28px, 3vw, 42px); }
.metrics span { color: rgba(255,255,255,.72); font-size: 13px; line-height: 1.5; }
.source { margin-top: 34px; color: rgba(255,255,255,.42); line-height: 1.6; }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 80px; margin-bottom: 58px; }
.section-heading > p { max-width: 500px; margin: 0 0 8px; color: #5d707a; font-size: 17px; line-height: 1.8; }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service-card { min-height: 246px; padding: 34px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.42); transition: transform .2s ease, background .2s ease; }
.service-card:hover { transform: translateY(-4px); background: var(--white); }
.service-card span { color: var(--gold); font-family: Georgia, serif; font-size: 30px; }
.service-card h3 { margin: 32px 0 12px; font-size: 22px; }
.service-card p { margin: 0; color: #667780; line-height: 1.7; }
.service-green { border-top: 4px solid var(--green); }
.service-gold { border-top: 4px solid var(--gold); }
.service-note { margin: 28px 0 0; padding: 20px 24px; color: var(--paper); background: var(--ink); font-size: 14px; line-height: 1.7; }

.process-section { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(64px, 9vw, 130px); }
.process-title { position: sticky; top: 120px; align-self: start; }
.process-title > p:last-child { max-width: 520px; margin-top: 30px; color: #60727b; font-size: 17px; line-height: 1.85; }
.process-list { margin: 0; padding: 0; list-style: none; counter-reset: item; }
.process-list li { padding: 26px 0; display: grid; grid-template-columns: 62px 1fr; gap: 24px; border-bottom: 1px solid var(--line); }
.process-list li:first-child { border-top: 1px solid var(--line); }
.process-list li > span { color: var(--gold); font-family: Georgia, serif; font-size: 28px; }
.process-list h3 { margin: 0 0 8px; font-size: 20px; }
.process-list p { margin: 0; color: #667780; line-height: 1.7; }

.readiness { padding: 110px max(24px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: .9fr 1.5fr; gap: clamp(54px, 8vw, 112px); color: var(--white); background: var(--green); scroll-margin-top: 76px; }
.readiness-heading h2 { font-size: clamp(38px, 4.2vw, 58px); }
.readiness-heading > p:last-child { max-width: 520px; margin: 28px 0 0; color: rgba(255,255,255,.72); font-size: 17px; line-height: 1.85; }
.readiness-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.2); border-left: 1px solid rgba(255,255,255,.2); }
.readiness-grid article { min-height: 230px; padding: 30px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.readiness-grid span { color: #f0bf82; font-family: Georgia, serif; font-size: 26px; }
.readiness-grid h3 { margin: 28px 0 12px; font-size: 21px; }
.readiness-grid p { margin: 0; color: rgba(255,255,255,.68); font-size: 15px; line-height: 1.8; }

.stage-band { padding: 100px max(24px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2px; color: var(--white); background: var(--ink); }
.stage-intro { padding-right: 48px; }
.stage-intro h2 { font-size: clamp(34px, 3.5vw, 52px); }
.stage-card { padding: 34px 28px; border-top: 3px solid var(--gold); background: var(--ink-soft); }
.stage-card:nth-child(3) { border-color: var(--green); }
.stage-card span { color: #e2ad6f; font-family: Georgia, serif; font-size: 24px; }
.stage-card h3 { margin: 34px 0 14px; font-size: 20px; }
.stage-card p { margin: 0; color: rgba(255,255,255,.64); line-height: 1.8; }

.trust { display: grid; grid-template-columns: 1fr 1fr; background: #102b3b; color: var(--white); }
.trust-photo { min-height: 760px; overflow: hidden; }
.trust-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.trust-copy { padding: 100px clamp(40px, 6vw, 94px); }
.trust-copy h2 { font-size: clamp(38px, 4vw, 56px); }
.trust-copy > p:not(.section-kicker) { color: rgba(255,255,255,.68); line-height: 1.8; }
.trust-grid { margin-top: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 36px 28px; }
.trust-grid div { padding-top: 16px; border-top: 1px solid rgba(255,255,255,.22); display: grid; gap: 10px; }
.trust-grid strong { color: #e2ad6f; font-size: 19px; }
.trust-grid span { color: rgba(255,255,255,.64); font-size: 14px; line-height: 1.7; }

.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.faq details { padding: 26px 28px; border: 1px solid var(--line); background: rgba(255,255,255,.5); }
.faq summary { cursor: pointer; font-size: 18px; font-weight: 700; }
.faq summary::marker { color: var(--gold); }
.faq details[open] { background: var(--white); }
.faq details p { margin: 18px 0 0; color: #62757f; line-height: 1.8; }

.contact { position: relative; padding: 108px max(24px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1fr auto; gap: 80px; align-items: center; overflow: hidden; color: var(--white); background: linear-gradient(110deg, #061b28 0%, #0c2a3b 62%, #143a4e 100%); scroll-margin-top: 76px; }
.contact:after { content: "LUFEI"; position: absolute; right: -32px; bottom: -65px; color: rgba(255,255,255,.035); font-family: Georgia, serif; font-size: 250px; font-weight: 800; line-height: 1; }
.contact-content { position: relative; z-index: 1; }
.contact-content > p:not(.section-kicker) { max-width: 620px; margin: 28px 0 0; color: rgba(255,255,255,.72); font-size: 17px; line-height: 1.8; }
.contact-tags { margin: 30px 0; display: flex; flex-wrap: wrap; gap: 8px; }
.contact-tags span { padding: 8px 13px; border: 1px solid rgba(255,255,255,.2); color: rgba(255,255,255,.78); font-size: 13px; }
.contact-content > p.contact-ready { max-width: 650px; margin: 0 0 30px; padding: 16px 18px; border-left: 3px solid var(--gold); color: rgba(255,255,255,.7); background: rgba(255,255,255,.06); font-size: 14px; }
.contact-ready strong { display: block; margin-bottom: 5px; color: #e2ad6f; font-size: 13px; letter-spacing: .08em; }
.download-link { display: inline-block; padding-bottom: 5px; border-bottom: 1px solid var(--gold); color: #e2ad6f; font-weight: 700; }
.qr-card { position: relative; z-index: 1; width: 290px; padding: 24px; display: grid; gap: 9px; color: var(--ink); background: var(--paper); text-align: center; }
.qr-card img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.qr-card strong { margin-top: 8px; font-size: 17px; }
.qr-card span { color: #667780; font-size: 13px; }

footer { padding: 34px max(24px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; gap: 28px; color: #6d7c84; background: #f7f4ed; font-size: 12px; }
footer img { width: 90px; height: 54px; object-fit: contain; }
footer p:last-child { margin-left: auto; }
.mobile-contact { display: none; }

@media (max-width: 980px) and (min-width: 761px) {
  .nav { gap: 17px; }
  .nav-cta { padding-inline: 16px; }
}

@media (max-width: 760px) {
  .site-header { height: 66px; padding: 8px 18px; }
  .brand img { width: 88px; height: 46px; }
  .nav a:not(.nav-cta) { display: none; }
  .nav-cta { padding: 10px 15px; }
  .mobile-section-nav { position: sticky; z-index: 16; top: 66px; padding: 0 18px; display: flex; gap: 24px; overflow-x: auto; color: var(--ink); background: rgba(247,244,237,.96); border-bottom: 1px solid var(--line); scrollbar-width: none; }
  .mobile-section-nav::-webkit-scrollbar { display: none; }
  .mobile-section-nav a { flex: 0 0 auto; padding: 14px 0 12px; font-size: 14px; font-weight: 700; }
  .section, .readiness, .contact { scroll-margin-top: 112px; }
  .hero { min-height: 700px; }
  .hero-image { object-position: 62% center; }
  .hero-shade { background: linear-gradient(180deg, rgba(3,20,31,.52), rgba(3,20,31,.92) 68%); }
  .hero-content { margin: 0; align-self: flex-end; padding: 140px 22px 170px; }
  .hero h1 { font-size: clamp(58px, 20vw, 86px); }
  .hero-note { left: 22px; right: auto; bottom: 46px; }
  .section { width: min(100% - 36px, var(--max)); padding: 80px 0; }
  .intro-grid, .market, .process-section, .readiness, .trust, .contact { grid-template-columns: 1fr; }
  .intro-grid { gap: 36px; }
  .intro-copy .lead { font-size: 19px; }
  .bridge { grid-template-columns: 1fr; }
  .bridge-arrow { min-height: auto; padding: 0 28px !important; transform: rotate(90deg); justify-content: center; }
  .bridge > div:not(.bridge-arrow) { min-height: 140px; }
  .market-media, .trust-photo { min-height: 360px; }
  .market-copy, .trust-copy { padding: 70px 22px; }
  .metrics { grid-template-columns: 1fr; }
  .section-heading { display: block; margin-bottom: 40px; }
  .section-heading > p { margin-top: 24px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 210px; }
  .process-section { gap: 48px; }
  .process-title { position: static; }
  .readiness { padding: 76px 18px; gap: 42px; }
  .readiness-grid { grid-template-columns: 1fr; }
  .readiness-grid article { min-height: auto; }
  .stage-band { padding: 76px 18px; grid-template-columns: 1fr; gap: 12px; }
  .stage-intro { padding: 0 0 36px; }
  .trust-copy { order: -1; }
  .trust-grid, .faq-grid { grid-template-columns: 1fr; }
  .contact { gap: 52px; }
  .contact:after { font-size: 130px; bottom: -20px; }
  .qr-card { width: min(100%, 310px); justify-self: center; }
  footer { align-items: flex-start; flex-wrap: wrap; padding-bottom: 100px; }
  footer p:last-child { margin-left: 0; width: 100%; }
  .mobile-contact { position: fixed; z-index: 30; right: 18px; bottom: 18px; min-width: 112px; min-height: 48px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; color: var(--ink); background: #e2ad6f; box-shadow: 0 10px 30px rgba(3,20,31,.28); font-size: 15px; font-weight: 800; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .service-card { transition: none; }
  .skip-link { transition: none; }
}