:root {
  --navy: #071a2d;
  --navy-2: #0d2940;
  --ivory: #f4f0e6;
  --paper: #fbf9f4;
  --gold: #b59a63;
  --ink: #132638;
  --muted: #687785;
  --line: #d8d1c4;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }

.site-header {
  height: 78px;
  padding: 0 clamp(24px, 5.5vw, 88px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 42px;
  background: rgba(251, 249, 244, 0.96);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
}
.brand { display: flex; flex-direction: column; width: max-content; }
.brand-main {
  font-family: "Noto Serif SC", "SimSun", serif;
  font-weight: 700;
  font-size: 23px;
  letter-spacing: .12em;
}
.brand-sub { margin-top: 3px; color: var(--gold); font-size: 8px; letter-spacing: .14em; }
.desktop-nav { display: flex; gap: clamp(26px, 3.2vw, 52px); font-size: 14px; }
.desktop-nav a { position: relative; padding: 29px 0 25px; }
.desktop-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 19px; width: 0; height: 1px;
  background: var(--gold); transition: width .2s ease;
}
.desktop-nav a:hover::after { width: 100%; }
.header-cta {
  justify-self: end; border: 1px solid var(--gold); padding: 10px 22px;
  color: #80683a; font-family: "Noto Serif SC", "SimSun", serif;
  transition: .2s ease;
}
.header-cta:hover { background: var(--navy); color: #dcc188; border-color: var(--navy); }

.hero { min-height: 620px; display: grid; grid-template-columns: 56% 44%; background: var(--ivory); }
.hero-copy {
  padding: clamp(72px, 8vw, 118px) clamp(32px, 4.5vw, 72px) 78px clamp(32px, 5.9vw, 95px);
  position: relative;
}
.eyebrow { margin: 0; color: #957b4b; font-size: 12px; letter-spacing: .24em; font-weight: 600; }
.gold-rule { display: block; width: 38px; height: 1px; background: var(--gold); margin: 20px 0 31px; }
.hero h1, .section h2, .method-section h2, .scenario-title h2, .contact-section h2 {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
}
.hero h1 {
  margin: 0; max-width: 700px; font-size: clamp(43px, 4vw, 64px);
  line-height: 1.38; letter-spacing: .035em; font-weight: 700;
}
.hero-lead {
  max-width: 650px; margin: 26px 0 0; color: var(--muted);
  font-size: 16px; line-height: 2; letter-spacing: .02em;
}
.hero-actions { display: flex; align-items: center; gap: 42px; margin-top: 34px; }
.primary-button {
  background: var(--navy); color: #d9ba7c; min-width: 208px; padding: 17px 24px;
  text-align: center; font-family: "Noto Serif SC", "SimSun", serif;
  transition: transform .2s ease, background .2s ease;
}
.primary-button:hover { background: var(--navy-2); transform: translateY(-1px); }
.primary-button span, .contact-card a span { margin-left: 12px; }
.text-link {
  padding: 14px 0 9px; border-bottom: 1px solid var(--gold); font-size: 14px;
}
.text-link span { margin-left: 20px; transition: margin .2s ease; }
.text-link:hover span { margin-left: 26px; }
.hero-image {
  background: linear-gradient(90deg, rgba(7,26,45,.14), transparent 28%),
    url("hero-boardroom.png") center/cover no-repeat;
  min-height: 620px;
}

.trust-strip {
  min-height: 96px; padding: 0 clamp(24px, 7vw, 115px);
  display: grid; grid-template-columns: repeat(3, 1fr); align-items: center;
  background: var(--navy); color: var(--paper);
}
.trust-strip > div { display: flex; align-items: center; justify-content: center; gap: 22px; min-height: 58px; }
.trust-strip > div + div { border-left: 1px solid rgba(181,154,99,.48); }
.trust-icon { color: #d4ae64; font-size: 35px; font-family: serif; }
.trust-strip p { display: flex; flex-direction: column; gap: 6px; margin: 0; }
.trust-strip strong { font-family: "Noto Serif SC", "SimSun", serif; font-size: 17px; font-weight: 500; letter-spacing: .12em; }
.trust-strip small { color: #91a2b1; font-size: 11px; letter-spacing: .06em; }

.section { padding: 108px clamp(24px, 6vw, 96px); }
.section-heading {
  display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 80px;
  max-width: 1280px; margin: 0 auto 58px;
}
.section-heading h2, .scenario-title h2 {
  margin: 17px 0 0; font-size: clamp(36px, 3.2vw, 51px); line-height: 1.42;
}
.section-heading > p {
  max-width: 520px; margin: 0 0 5px; color: var(--muted); line-height: 2; font-size: 15px;
}
.service-grid {
  max-width: 1280px; margin: 0 auto; display: grid;
  grid-template-columns: repeat(6, 1fr); gap: 16px;
}
.service-card {
  grid-column: span 2; min-height: 340px; padding: 28px;
  border: 1px solid var(--line); background: #fffdf8;
  transition: transform .25s ease, border .25s ease, box-shadow .25s ease;
}
.service-card:nth-child(4), .service-card:nth-child(5) { grid-column: span 3; }
.service-card:hover { transform: translateY(-5px); border-color: var(--gold); box-shadow: 0 20px 48px rgba(7,26,45,.07); }
.card-top { display: flex; align-items: center; justify-content: space-between; color: var(--gold); }
.card-top > span { font-family: Georgia, serif; font-size: 23px; }
.card-top small { font-size: 9px; letter-spacing: .14em; }
.service-card h3 { margin: 42px 0 15px; font-family: "Noto Serif SC", "SimSun", serif; font-size: 24px; }
.service-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 28px; }
.tags span { padding: 5px 9px; border: 1px solid #ded7ca; color: #8a7752; font-size: 10px; }

.method-section {
  display: grid; grid-template-columns: 1fr 1fr; gap: 9vw;
  padding: 112px clamp(24px, 8vw, 128px); background: var(--navy); color: var(--paper);
}
.eyebrow.light { color: #cfaf6f; }
.method-copy h2 { margin: 22px 0; font-size: clamp(39px, 3.5vw, 55px); line-height: 1.45; }
.method-copy > p { max-width: 580px; color: #a5b0ba; font-size: 15px; line-height: 2; }
.method-note { border-top: 1px solid #3d5163; margin-top: 45px; padding-top: 24px; display: flex; flex-direction: column; gap: 8px; }
.method-note span { color: var(--gold); font-size: 11px; letter-spacing: .2em; }
.method-note strong { font-size: 18px; letter-spacing: .07em; }
.method-points { display: flex; flex-direction: column; justify-content: center; }
.method-points article { display: grid; grid-template-columns: 65px 1fr; gap: 24px; padding: 29px 0; border-bottom: 1px solid #324659; }
.method-points article > span { color: var(--gold); font-family: Georgia, serif; font-size: 22px; }
.method-points h3 { margin: 0 0 9px; font-family: "Noto Serif SC", "SimSun", serif; font-size: 21px; font-weight: 500; }
.method-points p { margin: 0; color: #99a8b5; font-size: 13px; line-height: 1.8; }

.section-heading.compact { margin-bottom: 42px; }
.section-heading.compact h2 { font-size: clamp(36px, 3vw, 48px); }
.process-list { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line); }
.process-list article { min-height: 190px; padding: 25px 22px; border-right: 1px solid var(--line); }
.process-list article:last-child { border-right: 0; }
.process-list span { color: var(--gold); font-family: Georgia, serif; font-size: 30px; }
.process-list h3 { margin: 30px 0 10px; font-family: "Noto Serif SC", "SimSun", serif; font-size: 19px; }
.process-list p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.75; }

.scenarios-section { padding: 108px clamp(24px, 6vw, 96px); background: #ebe6db; }
.scenario-title { max-width: 1280px; margin: 0 auto 50px; }
.scenario-grid { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; }
.scenario-grid article { background: var(--paper); padding: 32px 26px; min-height: 230px; }
.scenario-grid span { color: var(--gold); font-size: 11px; letter-spacing: .2em; }
.scenario-grid h3 { margin: 35px 0 14px; font-family: "Noto Serif SC", "SimSun", serif; font-size: 20px; }
.scenario-grid p { color: var(--muted); font-size: 13px; line-height: 1.8; margin: 0; }

.about-section { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: .7fr 1.3fr; gap: 9vw; align-items: center; }
.about-mark {
  aspect-ratio: 1; display: grid; place-items: center; border: 1px solid var(--gold);
  font-family: "Noto Serif SC", "SimSun", serif; font-size: clamp(58px, 8vw, 112px);
  color: var(--navy); position: relative;
}
.about-mark::before { content: ""; position: absolute; inset: 14px; border: 1px solid #ddd3bf; }
.about-copy h2 { margin: 20px 0; font-size: clamp(34px, 3vw, 49px); line-height: 1.5; }
.about-copy > p { color: var(--muted); line-height: 2; }
.about-values { margin-top: 35px; display: grid; gap: 13px; }
.about-values span { border-top: 1px solid var(--line); padding-top: 13px; color: var(--muted); font-size: 13px; }
.about-values strong { display: inline-block; width: 90px; color: var(--ink); font-family: "Noto Serif SC", "SimSun", serif; font-size: 17px; }

.contact-section {
  padding: 92px clamp(24px, 9vw, 145px); display: grid; grid-template-columns: 1.1fr .9fr;
  align-items: center; gap: 10vw; background: var(--navy); color: var(--paper);
}
.contact-section h2 { margin: 20px 0 0; font-size: clamp(40px, 4vw, 61px); line-height: 1.4; }
.contact-card { padding: 33px 0 0 36px; border-left: 1px solid #486073; }
.contact-card p { color: #a7b3bd; line-height: 1.9; margin: 0 0 25px; }
.contact-card a { display: inline-block; background: #cfaf6f; color: var(--navy); padding: 16px 23px; font-weight: 600; margin-bottom: 26px; }
.contact-card small, .contact-card strong { display: block; }
.contact-card small { color: #7f91a0; font-size: 10px; letter-spacing: .18em; margin-bottom: 6px; }
.contact-card strong { font-size: 17px; font-weight: 500; letter-spacing: .06em; }

footer {
  padding: 38px clamp(24px, 6vw, 96px); display: grid; grid-template-columns: .8fr 1.5fr auto;
  gap: 60px; align-items: start; background: #04121f; color: #8fa0ae;
}
.footer-brand { display: flex; flex-direction: column; gap: 7px; }
.footer-brand strong { color: #e3dbc9; font-family: "Noto Serif SC", "SimSun", serif; font-size: 20px; letter-spacing: .1em; }
.footer-brand span, .footer-note p { font-size: 11px; letter-spacing: .07em; }
.footer-note p { margin: 0 0 10px; color: #c9b98e; }
.footer-note small { font-size: 10px; line-height: 1.7; }
footer > a { border: 1px solid #405163; width: 38px; height: 38px; display: grid; place-items: center; color: var(--gold); }

@media (prefers-reduced-motion: no-preference) {
  .hero-copy > * { animation: rise .6s both; }
  .hero-copy > *:nth-child(2) { animation-delay: .08s; }
  .hero-copy > *:nth-child(3) { animation-delay: .14s; }
  .hero-copy > *:nth-child(4) { animation-delay: .2s; }
  .hero-copy > *:nth-child(5) { animation-delay: .26s; }
  .hero-image { animation: fade 1s .12s both; }
  @keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
  @keyframes fade { from { opacity: 0; } to { opacity: 1; } }
}

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; height: 70px; padding: 0 20px; }
  .desktop-nav { display: none; }
  .brand-main { font-size: 19px; }
  .brand-sub { display: none; }
  .header-cta { padding: 8px 14px; font-size: 13px; }
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero-copy { padding: 65px 24px 58px; }
  .hero h1 { font-size: clamp(38px, 11vw, 52px); line-height: 1.36; }
  .hero-lead { font-size: 14px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 15px; }
  .hero-image { min-height: 330px; background-position: 58% center; }
  .trust-strip { grid-template-columns: 1fr; padding: 15px 24px; }
  .trust-strip > div { justify-content: flex-start; padding: 16px 5px; }
  .trust-strip > div + div { border-left: 0; border-top: 1px solid rgba(181,154,99,.35); }
  .section, .scenarios-section { padding: 74px 22px; }
  .section-heading { grid-template-columns: 1fr; gap: 22px; margin-bottom: 38px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card, .service-card:nth-child(4), .service-card:nth-child(5) { grid-column: auto; min-height: 0; }
  .method-section { grid-template-columns: 1fr; gap: 50px; padding: 78px 24px; }
  .process-list { grid-template-columns: 1fr; }
  .process-list article { min-height: 0; display: grid; grid-template-columns: 50px 105px 1fr; align-items: center; gap: 10px; border-right: 0; border-bottom: 1px solid var(--line); }
  .process-list h3, .process-list p { margin: 0; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-grid article { min-height: 0; }
  .about-section { grid-template-columns: 1fr; gap: 45px; }
  .about-mark { max-width: 300px; }
  .contact-section { grid-template-columns: 1fr; gap: 50px; padding: 76px 24px; }
  footer { grid-template-columns: 1fr; gap: 25px; padding: 38px 24px; }
}