:root {
  --paper: #f6f6f2;
  --white: #fff;
  --ink: #181a19;
  --muted: #666964;
  --line: #c9cbc5;
  --focus: #315e5a;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "Helvetica Neue", "PingFang SC", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); }
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, figure, dl, dd { margin: 0; }
button { font: inherit; }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 5px;
}

.page-shell { width: 100%; padding-inline: clamp(28px, 5vw, 72px); }
.section-space { padding-block: clamp(104px, 10.5vw, 152px); }
.eyebrow, .section-index, .content-type {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .16em;
}

.site-header {
  position: relative;
  z-index: 10;
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.wordmark { display: block; width: 180px; line-height: 0; }
.wordmark img { display: block; width: 100%; height: auto; }
.site-header nav { display: flex; gap: 40px; font-size: 13px; }
.site-header nav a { padding-block: 12px; }
.nav-toggle { display: none; border: 0; background: none; color: var(--ink); cursor: pointer; }

.hero {
  min-height: 900px;
  display: grid;
  grid-template-columns: 4.6fr 7.4fr;
  gap: 56px;
  align-items: center;
  padding-top: 42px;
  padding-bottom: 72px;
  background: var(--white);
}
.hero-copy { max-width: 510px; align-self: end; padding-bottom: 42px; }
.hero h1 {
  margin-top: 32px;
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(54px, 4.6vw, 66px);
  line-height: 1.15;
  font-weight: 400;
  letter-spacing: -.035em;
}
.lead { margin-top: 34px; max-width: 420px; font-size: 17px; line-height: 1.9; color: #444744; }
.text-cta { display: inline-block; margin-top: 48px; padding-bottom: 8px; border-bottom: 1px solid var(--ink); font-size: 14px; }
.hero-photo { height: 760px; align-self: stretch; }
.hero-photo img { object-position: center center; }

.media-frame { overflow: hidden; }
.media-frame picture { display: block; width: 100%; height: 100%; }
.media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }

.section-intro { margin-bottom: 72px; max-width: 760px; }
.section-intro h2,
.consultation h2,
.doctor-copy h2 {
  margin-top: 22px;
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(38px, 3.2vw, 46px);
  line-height: 1.25;
  font-weight: 400;
  letter-spacing: -.02em;
}

.expertise-composition { display: grid; grid-template-columns: 1.25fr .9fr; gap: 88px; align-items: start; }
.expertise-item h3 { font-family: Georgia, "Songti SC", serif; font-size: 30px; font-weight: 400; }
.expertise-primary { grid-row: span 2; }
.expertise-secondary { margin-top: 92px; }
.expertise-tertiary { grid-column: 2; }
.expertise-photo-primary { height: 660px; }
.expertise-photo-revision { height: 300px; }
.expertise-photo-aging { height: 330px; }
.expertise-photo img { object-position: center center; }
.item-copy { display: grid; grid-template-columns: 36px auto; margin-top: 24px; align-items: baseline; }
.item-copy span { font-size: 10px; color: var(--muted); }
.item-copy p { grid-column: 2; margin-top: 12px; max-width: 390px; font-size: 14px; line-height: 1.7; color: var(--muted); }

.cases { padding: 176px 40px 190px; background: var(--white); }
.split-heading { max-width: none; display: flex; justify-content: space-between; align-items: end; gap: 40px; }
.text-link { display: inline-block; font-size: 13px; border-bottom: 1px solid var(--line); padding-bottom: 7px; }
.muted-link { color: var(--muted); cursor: default; }
.case-images { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.case-photo { aspect-ratio: 1 / 1; }
.case-photo img { object-position: center center; }
.case-figure figcaption { margin-top: 12px; font-size: 11px; letter-spacing: .14em; color: var(--muted); }
.case-disclosure { margin-top: 28px; font-size: 12px; line-height: 1.6; color: var(--muted); }

.reasoning { padding-top: 190px; padding-bottom: 190px; }
.narrow-intro { max-width: 520px; margin-bottom: 100px; }
.principles { list-style: none; margin: 0 0 0 25%; padding: 0; }
.principles li { display: grid; grid-template-columns: 70px 230px 1fr; align-items: baseline; padding: 28px 0; border-top: 1px solid var(--line); }
.principles li:last-child { border-bottom: 1px solid var(--line); }
.principles span { font-size: 10px; color: var(--muted); }
.principles h3 { font-family: Georgia, "Songti SC", serif; font-size: 27px; font-weight: 400; }
.principles p { color: var(--muted); font-size: 14px; }

.knowledge { background: var(--white); }
.knowledge-layout { display: grid; grid-template-columns: 1.08fr .92fr; gap: 72px; align-items: start; }
.popular-visual { height: 450px; }
.popular-visual img { object-position: center center; }
.research-feature { margin-top: 86px; display: grid; grid-template-columns: 1fr; gap: 24px; align-items: start; }
.research-visual { height: 320px; }
.research-visual img { display: block; width: 100%; height: 100%; object-fit: contain; object-position: center center; }
.research-copy { max-width: 430px; }
.popular-article .content-type { margin-top: 24px; }
.knowledge h3 { margin-top: 16px; font-family: Georgia, "Songti SC", serif; font-size: 30px; font-weight: 400; }
.knowledge article > p:not(.content-type), .research-copy > p:not(.content-type) { margin-top: 14px; font-size: 14px; line-height: 1.7; color: var(--muted); }
.knowledge .text-link { margin-top: 26px; }

.doctor { display: grid; grid-template-columns: 1.15fr .85fr; gap: 100px; align-items: center; }
.doctor-portrait { height: 600px; }
.doctor-portrait img { object-position: 56% center; }
.doctor-copy { max-width: 480px; }
.doctor-copy .eyebrow { margin-top: 20px; }
.statement { margin-top: 48px; font-size: 15px; line-height: 1.8; color: var(--muted); }
.doctor-copy .text-link { margin-top: 34px; }

.consultation { min-height: 580px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; background: var(--white); }
.consultation h2 { margin-top: 28px; font-size: clamp(42px, 3.5vw, 50px); }
.consultation > p:not(.section-index) { margin-top: 22px; font-size: 15px; color: var(--muted); }
.button-outline { margin-top: 44px; padding: 15px 40px; border: 1px solid var(--ink); font-size: 13px; }

.site-footer { min-height: 270px; padding-top: 64px; padding-bottom: 64px; display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 60px; border-top: 1px solid var(--line); align-items: start; }
.footer-lockup { display: block; width: 220px; line-height: 0; }
.footer-lockup img { display: block; width: 100%; height: auto; }
.site-footer p { margin-top: 12px; font-size: 12px; color: var(--muted); }
.footer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 30px; font-size: 12px; }
.footer-note { justify-self: end; max-width: 220px; text-align: right; }

@media (max-width: 980px) {
  .page-shell { padding-inline: 40px; }
  .hero { min-height: auto; grid-template-columns: .9fr 1.1fr; gap: 36px; padding-block: 56px; }
  .hero-photo { height: 620px; }
  .hero-copy { padding-bottom: 20px; }
  .expertise-composition { gap: 48px; }
  .expertise-photo-primary { height: 560px; }
  .knowledge-layout { gap: 44px; }
  .doctor { grid-template-columns: 1.05fr .95fr; gap: 56px; }
  .doctor-portrait { height: 540px; }
  .principles { margin-left: 12%; }
}

@media (max-width: 720px) {
  html { scroll-behavior: auto; }
  .page-shell { padding-inline: 24px; }
  .section-space { padding-block: 92px; }
  .site-header { min-height: 72px; }
  .wordmark { width: 150px; }
  .nav-toggle { display: block; min-width: 48px; min-height: 44px; }
  .site-header nav {
    display: none;
    position: absolute;
    inset: 72px 0 auto;
    padding: 18px 24px 24px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
  }
  .site-header nav[data-open] { display: flex; }
  .site-header nav a { min-height: 44px; display: flex; align-items: center; }

  .hero { display: grid; grid-template-columns: 1fr; grid-template-areas: "photo" "copy"; gap: 42px; padding-top: 24px; padding-bottom: 88px; }
  .hero-photo { grid-area: photo; height: min(112vw, 520px); }
  .hero-photo img { object-position: 62% center; }
  .hero-copy { grid-area: copy; max-width: none; align-self: auto; padding-bottom: 0; }
  .hero h1 { margin-top: 22px; font-size: clamp(41px, 12vw, 52px); }
  .lead { margin-top: 24px; font-size: 15px; line-height: 1.75; }
  .text-cta { margin-top: 30px; }

  .section-intro { margin-bottom: 52px; }
  .section-intro h2, .doctor-copy h2 { font-size: 38px; }
  .expertise-composition { display: grid; grid-template-columns: 1fr; gap: 74px; }
  .expertise-primary, .expertise-secondary, .expertise-tertiary { grid-column: 1; grid-row: auto; margin-top: 0; }
  .expertise-photo-primary, .expertise-photo-revision, .expertise-photo-aging { height: auto; aspect-ratio: 4 / 3; }
  .expertise-photo-primary { aspect-ratio: 1 / 1; }
  .expertise-photo-revision { aspect-ratio: 5 / 3; }

  .cases { padding: 104px 24px 116px; }
  .split-heading { display: block; }
  .split-heading .text-link { margin-top: 24px; }
  .case-images { grid-template-columns: 1fr; gap: 46px; }
  .case-disclosure { margin-top: 34px; }

  .reasoning { padding-block: 120px; }
  .narrow-intro { margin-bottom: 70px; }
  .principles { margin: 0; }
  .principles li { grid-template-columns: 40px 1fr; gap: 10px; }
  .principles li p { grid-column: 2; margin-top: 10px; line-height: 1.6; }

  .knowledge-layout { grid-template-columns: 1fr; gap: 88px; }
  .popular-visual { height: auto; aspect-ratio: 3 / 2; }
  .research-feature { margin-top: 0; }
  .research-visual { height: auto; aspect-ratio: 7 / 4; }
  .research-copy { max-width: none; }

  .doctor { grid-template-columns: 1fr; gap: 56px; }
  .doctor-portrait { height: auto; aspect-ratio: 6 / 5; }
  .doctor-portrait img { object-position: 56% center; }
  .statement { margin-top: 34px; }

  .consultation { min-height: 540px; }
  .consultation h2 { font-size: 39px; }
  .consultation > p:not(.section-index) { max-width: 300px; line-height: 1.7; }
  .site-footer { grid-template-columns: 1fr; gap: 42px; }
  .footer-lockup { width: 210px; }
  .footer-note { justify-self: start; text-align: left; }
}

@media (max-width: 390px) {
  .page-shell { padding-inline: 20px; }
  .hero h1 { font-size: 42px; }
  .section-intro h2, .doctor-copy h2 { font-size: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}