.research-article .knowledge-heading { margin-bottom: 2rem; }
.research-article .knowledge-heading h1 { max-width: 900px; }
.research-article .knowledge-contents { position: sticky; top: 6.5rem; }
.research-hero { max-width: 900px; margin: 0 0 3rem; overflow: hidden; border: 1px solid var(--site-line); border-radius: 10px; background: #faf8f1; }
.research-hero img { display: block; width: 100%; height: auto; }
.research-article .research-summary { padding: 1.5rem 1.5rem 0.5rem; border-left: 3px solid var(--site-teal); border-radius: 0 8px 8px 0; background: var(--site-tint); }
.research-article .research-study-list { padding-left: 1.6rem; }
.research-article .research-study-list > li { padding: 1.25rem 0 0.4rem 0.35rem; border-top: 1px solid var(--site-line); }
.research-article .research-study-list > li::marker { color: var(--site-teal); font-weight: 700; }
.research-article .research-study-list h3 { margin: 0 0 0.55rem; line-height: 1.45; }
.research-article .research-study-list h3 a { color: var(--site-ink); text-decoration: none; }
.research-article .research-study-list h3 a:hover { color: var(--site-teal); text-decoration: underline; }
.research-article .research-study-list p { margin-bottom: 0.85rem; }
.research-year-navigation { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; border-top: 1px solid var(--site-line); padding-top: 1.75rem; }
.research-year-navigation-link { display: block; padding: 1rem 1.25rem; border: 1px solid var(--site-line); border-radius: 8px; color: var(--site-ink); text-decoration: none; }
.research-year-navigation-link:hover { border-color: var(--site-teal); background: var(--site-tint); }
.research-year-navigation-next { grid-column: 2; text-align: right; }
.research-year-navigation-label { display: block; color: var(--site-teal); font-size: 0.8rem; font-weight: 700; }
.research-year-navigation-link strong { display: block; margin-top: 0.35rem; font-size: 1rem; line-height: 1.4; }
.research-index .knowledge-heading { margin-bottom: 2rem; }
.research-index .research-hero { max-width: 850px; }
.research-year-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.research-year-card { position: relative; padding: 1.5rem; border: 1px solid var(--site-line); border-radius: 8px; background: #fff; }
.research-year-card:nth-child(4n + 3),
.research-year-card:nth-child(4n + 4) { background: var(--site-tint); }
.research-year-card:hover { border-color: var(--site-teal); }
.research-year-card:focus-within { outline: 3px solid var(--site-teal); outline-offset: 5px; }
.research-year-card h3 { margin-bottom: 0.7rem; font-size: 1.35rem; line-height: 1.3; }
.research-year-card h3 a { color: inherit; text-decoration: none; }
.research-year-card h3 a::after { position: absolute; inset: 0; content: ""; }
.research-year-card h3 a:hover { text-decoration: underline; }
.research-year-card h3 a:focus-visible { outline: none; text-decoration: underline; }
.research-year-card > p { margin-bottom: 0; color: var(--site-muted); font-size: 0.95rem; line-height: 1.6; }
.research-index-method { max-width: 760px; margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--site-line); }
.research-index-method h2 { margin-bottom: 0.8rem; font-size: 1.35rem; }
.research-index-method p { color: var(--site-muted); line-height: 1.7; }

@media (max-width: 760px) {
    .research-article .knowledge-contents { position: static; }
    .research-hero { margin-bottom: 2rem; }
    .research-article .research-summary { padding: 1.25rem 1.25rem 0.4rem; }
    .research-year-grid { grid-template-columns: 1fr; }
    .research-year-card:nth-child(n) { background: #fff; }
    .research-year-card:nth-child(2n) { background: var(--site-tint); }
    .research-year-navigation { grid-template-columns: 1fr; }
    .research-year-navigation-next { grid-column: 1; text-align: left; }
}

@media print {
    .research-hero { display: none; }
    .research-year-navigation { display: none; }
}