:root {
  --paper: #fbfaf7;
  --paper-deep: #f4f0e8;
  --white: #fffefb;
  --ink: #191918;
  --ink-soft: #3f3d39;
  --muted: #6f6b64;
  --line: #ddd8cf;
  --line-strong: #c9c2b6;
  --red: #b32824;
  --red-dark: #8f1f1c;
  --bronze: #b89453;
  --dark: #191b1d;
  --max-width: 1320px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 17px;
  font-weight: 400;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
img { max-width: 100%; }
::selection { background: #ead1c8; color: var(--ink); }
.skip-link { position: fixed; top: -60px; left: 12px; z-index: 50; padding: 10px 14px; background: #fff; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(25,25,24,.11);
  background: rgba(251,250,247,.94);
  backdrop-filter: blur(16px);
}
.header-inner {
  width: min(var(--max-width), calc(100% - 48px));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 34px;
}
.brand { display: flex; align-items: center; gap: 11px; margin-right: auto; text-decoration: none; line-height: 1; }
.brand-mark { width: 42px; height: 42px; flex: 0 0 42px; }
.brand strong { display: inline-block; font-size: 19px; letter-spacing: -.02em; }
.brand small { margin-left: 8px; font-size: 14px; font-weight: 700; }
nav { display: flex; align-items: center; gap: 27px; }
nav a { color: #3d3b37; font-size: 14px; font-weight: 600; text-decoration: none; }
nav a:hover { color: var(--red); }
.header-actions { display: flex; align-items: center; gap: 9px; }

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  transition: background .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { border-color: var(--red); background: var(--red); color: #fff; }
.button-primary:hover { border-color: var(--red-dark); background: var(--red-dark); }
.button-outline:hover { border-color: var(--red); color: var(--red); }
.button-small { min-height: 41px; padding-inline: 15px; font-size: 13px; }

.hero {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
  padding: 72px 0 92px;
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(520px, 1.18fr);
  gap: clamp(46px, 6vw, 86px);
  align-items: center;
}
.hero-copy { min-width: 0; }
.eyebrow { margin: 0 0 28px; color: #8d2925; font: 700 12px/1.3 Georgia, "Times New Roman", serif; letter-spacing: .08em; }
.eyebrow::after { content: ""; display: inline-block; width: 44px; height: 1px; margin-left: 14px; background: currentColor; vertical-align: middle; }
.eyebrow.red { color: var(--red); }
.eyebrow.light { color: #d6b376; }
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 560px;
  margin-bottom: 28px;
  font-size: clamp(48px, 4.8vw, 72px);
  line-height: 1.16;
  letter-spacing: -.055em;
  font-weight: 800;
}
.hero-lead { max-width: 620px; margin-bottom: 34px; color: var(--ink-soft); font-size: 19px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 54px; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.principles div { padding: 22px 18px 0 0; }
.principles div + div { padding-left: 18px; border-left: 1px solid var(--line); }
.principles strong, .principles span { display: block; }
.principles strong { margin-bottom: 3px; font-size: 13px; }
.principles span { color: var(--muted); font-size: 11px; line-height: 1.5; }

.research-sample {
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 14px 36px rgba(48,39,28,.08);
  font-family: inherit;
  font-synthesis: none;
}
.sample-header { padding: 24px 28px 20px; border-bottom: 2px solid var(--red); }
.sample-header div { display: flex; justify-content: space-between; gap: 20px; margin-bottom: 26px; color: var(--muted); font-size: 12px; font-weight: 400; }
.sample-header div span { color: var(--ink); font-weight: 600; }
.sample-header h2 { margin: 0; font-size: 29px; font-weight: 700; line-height: 1.25; letter-spacing: -.03em; }
.sample-row { display: grid; grid-template-columns: 112px 1fr; gap: 24px; padding: 18px 28px; border-bottom: 1px solid var(--line); }
.sample-row h3 { margin: 0; font-size: 13px; font-weight: 700; line-height: 1.65; }
.sample-row p, .sample-row ul { margin: 0; color: #48453f; font-size: 14px; font-weight: 400; line-height: 1.7; }
.sample-row ul { padding-left: 18px; }
.sample-row li + li { margin-top: 5px; }
.sample-source { display: grid; grid-template-columns: 112px 1fr; gap: 24px; padding: 18px 28px; color: #48453f; font-size: 14px; font-weight: 400; line-height: 1.7; }
.sample-source strong { color: var(--ink); font-size: 13px; font-weight: 700; line-height: 1.65; }

.section-pad { padding: clamp(88px, 9vw, 138px) max(24px, calc((100% - var(--max-width)) / 2)); }
.results { border-top: 1px solid var(--line); background: var(--white); }
.results-heading { max-width: 850px; margin: 0 auto 62px; text-align: center; }
.results-heading .eyebrow { margin-bottom: 24px; }
.results-heading h2 { margin-bottom: 18px; font-size: clamp(36px, 4vw, 54px); line-height: 1.2; letter-spacing: -.045em; }
.results-heading > p:last-child { color: var(--muted); font-size: 18px; }
.result-list { max-width: 1100px; margin: 0 auto; padding: 0; border-top: 1px solid var(--line-strong); list-style: none; }
.result-list li { display: grid; grid-template-columns: 110px 1fr; gap: 34px; align-items: center; min-height: 126px; padding: 24px 28px; border-bottom: 1px solid var(--line); }
.result-number { color: var(--red); font: 400 39px/1 Georgia, serif; }
.result-list h3 { margin: 0 0 7px; font-size: 21px; }
.result-list p { margin: 0; color: var(--muted); font-size: 16px; }

.start { background: var(--paper-deep); }
.section-intro { max-width: 760px; margin-bottom: 58px; }
.section-intro h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 50px); line-height: 1.2; letter-spacing: -.04em; }
.start-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 0; padding: 0; border-top: 1px solid var(--line-strong); list-style: none; }
.start-steps li { min-height: 230px; padding: 26px 36px 34px 0; border-bottom: 1px solid var(--line-strong); }
.start-steps li + li { padding-left: 36px; border-left: 1px solid var(--line-strong); }
.start-steps span { color: var(--red); font: 400 27px/1 Georgia, serif; }
.start-steps h3 { margin: 28px 0 10px; font-size: 22px; font-weight: 700; }
.start-steps p { margin: 0; color: var(--muted); }
.research-note { display: grid; grid-template-columns: 280px 1fr; gap: 60px; margin-top: 42px; padding-top: 30px; border-top: 1px solid var(--line-strong); }
.research-note strong { font-size: 18px; }
.research-note p { margin: 0; color: var(--muted); }

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 80px;
  align-items: center;
  padding: 76px max(24px, calc((100% - var(--max-width)) / 2));
  background: var(--dark);
  color: #fff;
}
.contact-band > div { max-width: 760px; }
.contact-band h2 { margin-bottom: 14px; font-size: clamp(32px, 3.5vw, 48px); line-height: 1.2; letter-spacing: -.04em; }
.contact-band p:not(.eyebrow) { margin: 0; color: #c8c3ba; }
.contact-band .button { min-width: 270px; }
.contact-email[aria-disabled="true"] { cursor: default; border-color: #7c6b67; background: #7c6b67; }

.site-footer { padding: 42px max(24px, calc((100% - var(--max-width)) / 2)); background: #111315; color: #fff; }
.footer-brand { display: flex; justify-content: space-between; gap: 24px; padding-bottom: 22px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-brand span, .footer-meta, .site-footer p { color: #9d9a94; font-size: 12px; }
.footer-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 22px; }
.site-footer p { margin: 10px 0 0; }

@media (max-width: 1080px) {
  nav { display: none; }
  .hero { grid-template-columns: minmax(0, .76fr) minmax(480px, 1.24fr); gap: 42px; }
  h1 { font-size: 52px; }
}

@media (max-width: 900px) {
  .header-inner { width: min(100% - 32px, var(--max-width)); }
  .hero { width: min(100% - 40px, 720px); grid-template-columns: 1fr; padding: 58px 0 82px; }
  .hero-copy { max-width: 650px; }
  h1 { max-width: 680px; font-size: clamp(46px, 8vw, 66px); }
  .research-sample { width: 100%; }
  .results-heading { margin-bottom: 46px; }
  .contact-band { gap: 40px; }
}

@media (max-width: 680px) {
  body { font-size: 15px; }
  .site-header { position: static; }
  .header-inner { min-height: 68px; gap: 14px; }
  .brand-mark { width: 35px; height: 35px; flex-basis: 35px; }
  .brand strong { font-size: 17px; }
  .brand small { font-size: 12px; }
  .header-actions { display: none; }
  .hero { width: min(100% - 32px, 620px); padding-top: 48px; gap: 50px; }
  .eyebrow { margin-bottom: 20px; font-size: 10px; }
  h1 { font-size: clamp(42px, 12vw, 55px); line-height: 1.12; overflow-wrap: anywhere; }
  .hero-lead { font-size: 16px; line-height: 1.8; }
  .hero-actions { display: grid; margin-bottom: 42px; }
  .hero-actions .button { width: 100%; }
  .principles { grid-template-columns: 1fr; }
  .principles div { padding: 15px 0; border-bottom: 1px solid var(--line); }
  .principles div + div { padding-left: 0; border-left: 0; }
  .sample-header { padding: 21px 19px 17px; }
  .sample-header div { margin-bottom: 18px; }
  .sample-header h2 { font-size: 23px; }
  .sample-row { grid-template-columns: 1fr; gap: 6px; padding: 15px 19px; }
  .sample-row h3 { color: var(--red); }
  .sample-source { grid-template-columns: 1fr; gap: 3px; padding: 15px 19px; }
  .sample-source strong { color: var(--red); }
  .section-pad { padding: 78px 20px; }
  .results-heading { text-align: left; }
  .results-heading h2 { font-size: 37px; }
  .results-heading > p:last-child { font-size: 16px; }
  .result-list li { grid-template-columns: 64px 1fr; gap: 18px; min-height: 138px; padding: 22px 0; }
  .result-number { font-size: 31px; }
  .result-list h3 { font-size: 19px; }
  .start-steps { grid-template-columns: 1fr; }
  .start-steps li, .start-steps li + li { min-height: auto; padding: 24px 0 30px; border-left: 0; }
  .start-steps h3 { margin-top: 28px; }
  .research-note { grid-template-columns: 1fr; gap: 12px; }
  .contact-band { grid-template-columns: 1fr; gap: 32px; padding: 64px 20px; }
  .contact-band .button { width: 100%; min-width: 0; }
  .footer-brand { display: grid; gap: 5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}