.research-hero {
  display: grid;
  overflow: hidden;
  min-height: 620px;
  grid-template-columns: 1.25fr .75fr;
  border-radius: 28px;
  color: #fff;
  background: var(--hero);
  box-shadow: 0 28px 80px rgb(18 20 25 / 14%);
}
.research-hero > div { display: flex; padding: 64px 58px 56px; flex-direction: column; align-items: flex-start; }
.research-hero h1 { max-width: 820px; margin-bottom: 32px; font-size: clamp(54px, 6vw, 86px); font-weight: 570; line-height: .91; letter-spacing: -.065em; }
.research-answer { max-width: 740px; margin: auto 0 0; color: #c6d0da; font-size: clamp(17px, 1.7vw, 21px); line-height: 1.6; }
.research-answer strong { color: #fff; font-weight: 680; }
.research-hero aside { display: flex; padding: 42px 34px; flex-direction: column; justify-content: center; border-left: 1px solid var(--hero-line); background: var(--hero-raised); }
.research-hero aside > span { margin-bottom: 34px; color: #7fa2ff; font: 740 10px/1.2 var(--mono); letter-spacing: .12em; }
.research-hero blockquote { margin: 0 0 40px; font-size: clamp(23px, 2.5vw, 36px); font-weight: 560; line-height: 1.3; letter-spacing: -.035em; }
.research-hero aside p { margin: auto 0 0; color: #9eabb8; font: 600 11px/1.5 var(--mono); }

.evidence-principles { display: grid; margin-top: 110px; grid-template-columns: .8fr 1.2fr; gap: 60px; }
.evidence-principles h2, .dataset-heading h2, .reuse-section h2 { margin-bottom: 0; font-size: clamp(40px, 4.2vw, 64px); font-weight: 570; line-height: .99; letter-spacing: -.055em; }
.evidence-principles ol { margin: 0; padding: 0; border-top: 1px solid var(--line-strong); list-style: none; }
.evidence-principles li { display: grid; padding: 22px 0; grid-template-columns: 46px 1fr; gap: 14px; border-bottom: 1px solid var(--line); }
.evidence-principles li > span { color: var(--blue); font: 720 11px/1.5 var(--mono); }
.evidence-principles li strong { display: block; margin-bottom: 5px; font-size: 18px; }
.evidence-principles li p { margin: 0; color: var(--muted); }

.dataset-section { margin-top: 135px; }
.dataset-heading { display: grid; margin-bottom: 42px; grid-template-columns: 1fr .9fr; gap: 50px; align-items: end; }
.dataset-heading > p { margin-bottom: 4px; color: var(--muted); font-size: 17px; }
.comparison-ledger { display: grid; overflow: hidden; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line-strong); border-radius: 22px; background: var(--white); }
.comparison-ledger article { padding: 30px; border-left: 1px solid var(--line); }
.comparison-ledger article:first-child { border-left: 0; }
.comparison-ledger article.is-highlight { background: var(--blue-soft); }
.comparison-ledger article.is-result { color: #fff; background: var(--blue); }
.comparison-ledger article > span, .metrics-grid article > span { display: block; margin-bottom: 26px; color: var(--muted); font: 730 10px/1.3 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.comparison-ledger .is-result > span { color: #bed0ff; }
.comparison-ledger article > strong { display: block; margin-bottom: 34px; font-size: clamp(38px, 4vw, 58px); font-weight: 610; letter-spacing: -.055em; }
.comparison-ledger dl { margin: 0; }
.comparison-ledger dl div { display: flex; padding: 12px 0; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); }
.comparison-ledger .is-result dl div { border-color: rgb(255 255 255 / 20%); }
.comparison-ledger dt { color: var(--muted); font-size: 13px; }
.comparison-ledger .is-result dt { color: #cfdbff; }
.comparison-ledger dd { margin: 0; text-align: right; font-size: 13px; font-weight: 700; }
.method-grid { display: grid; margin-top: 22px; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.method-grid article { padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.method-grid h3, .limitations h3 { margin-bottom: 12px; font-size: 19px; }
.method-grid p { margin: 0; color: var(--muted); }
.data-link { display: inline-flex; margin-top: 22px; align-items: center; gap: 12px; color: var(--blue); font-weight: 730; }
.data-link span { font-size: 20px; }

.metrics-grid { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.metrics-grid article { min-height: 190px; padding: 28px 22px; border-left: 1px solid var(--line); }
.metrics-grid article:first-child { border-left: 0; }
.metrics-grid article > strong { display: block; margin-bottom: 10px; font-size: clamp(28px, 3vw, 42px); font-weight: 620; letter-spacing: -.045em; }
.metrics-grid article p { margin: 0; color: var(--muted); font-size: 13px; }
.limitations { margin-top: 22px; padding: 28px; border: 1px solid #f0c6ae; border-radius: 18px; background: var(--orange-soft); }
.limitations ul { padding-left: 22px; color: #6d4938; }
.limitations li + li { margin-top: 7px; }
.limitations p { margin: 18px 0 0; color: #795342; font-size: 13px; }
.reuse-section { display: grid; margin-top: 135px; padding: 40px; grid-template-columns: .8fr 1.2fr; gap: 60px; border-radius: 22px; color: #fff; background: var(--hero); }
.reuse-section > div:last-child p { margin: 0; padding: 20px 0; color: #c2ccd7; border-bottom: 1px solid var(--hero-line); font-size: 17px; }
.reuse-section > div:last-child p:last-child { border-bottom: 0; }

@media (max-width: 1040px) {
  .research-hero { grid-template-columns: 1fr; }
  .research-hero aside { min-height: 380px; border-top: 1px solid var(--hero-line); border-left: 0; }
  .evidence-principles, .dataset-heading, .reuse-section { grid-template-columns: 1fr; }
  .comparison-ledger { grid-template-columns: 1fr; }
  .comparison-ledger article { border-top: 1px solid var(--line); border-left: 0; }
  .comparison-ledger article:first-child { border-top: 0; }
  .method-grid { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid article { border-top: 1px solid var(--line); }
  .metrics-grid article:nth-child(odd) { border-left: 0; }
}

@media (max-width: 700px) {
  .research-hero { border-radius: 22px; }
  .research-hero > div { min-height: 620px; padding: 42px 20px 32px; }
  .research-hero h1 { font-size: clamp(46px, 13vw, 62px); }
  .research-hero aside { padding: 34px 20px; }
  .evidence-principles, .dataset-section, .reuse-section { margin-top: 96px; }
  .evidence-principles, .dataset-heading, .reuse-section { gap: 28px; }
  .evidence-principles h2, .dataset-heading h2, .reuse-section h2 { font-size: 42px; }
  .comparison-ledger article { padding: 24px 18px; }
  .method-grid article, .limitations { padding: 22px 18px; }
  .metrics-grid { grid-template-columns: 1fr; }
  .metrics-grid article { min-height: 145px; border-left: 0; }
  .reuse-section { padding: 30px 20px; }
}