/* Research-page navigation and reading rhythm. Shared by both languages. */
.research-directory{padding-top:26px}
.research-directory-links{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;list-style:none;margin:0;padding:0}
.research-directory-links li{min-width:0}
.research-directory-links a{display:flex;align-items:center;min-height:100%;padding:13px 16px;border:1px solid var(--line);border-radius:12px;background:#f7f9fd;color:#23496f;font-size:14px;line-height:1.55;transition:background .18s,border-color .18s,color .18s}
.research-directory-links a:hover{background:#edf4fd;border-color:#aec9eb;color:#1559a6}
.research-directory-mobile{display:none}
.research-list{padding-top:12px}
.research-row{align-items:center;scroll-margin-top:calc(var(--nav) + 24px)}
.research-row>img{width:100%;height:auto;aspect-ratio:auto;object-fit:contain;align-self:center}
.research-row#air-interface>img{aspect-ratio:1944/809}
.research-row#ai-ran>img{aspect-ratio:1688/932}
.research-row#agent-network>img{aspect-ratio:1672/941}
.research-row#semantic-communication>img{aspect-ratio:1824/862}
.research-row#validation>img{aspect-ratio:1672/941}
.research-row>div{min-width:0}
.research-row p{margin:0}
.research-row p+p{margin-top:.45em}
html[lang=en] .research-directory-links a{font-size:13px;line-height:1.5}
html[lang=en] .research-row p{line-height:1.7}
@media(max-width:1050px){
  .research-row{grid-template-columns:1fr;gap:24px}
  .research-row>img{max-width:680px;justify-self:center}
}
@media(max-width:1050px) and (min-width:851px){
  .research-directory-links{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:850px){
  .research-directory{padding-top:20px}
  .research-directory-desktop{display:none}
  .research-directory-mobile{display:block;border:1px solid var(--line);border-radius:12px;background:#f7f9fd}
  .research-directory-mobile summary{padding:13px 16px;cursor:pointer;color:#23496f;font-size:14px;font-weight:600;min-height:48px}
  .research-directory-mobile summary::marker{color:#1668c9}
  .research-directory-mobile[open] summary{border-bottom:1px solid var(--line)}
  .research-directory-mobile .research-directory-links{display:block;padding:7px 10px}
  .research-directory-mobile .research-directory-links a{border:0;border-radius:7px;background:transparent;padding:11px 10px;min-height:44px;font-size:14px}
  .research-directory-mobile .research-directory-links a:hover{background:#eaf2fd}
  .research-list{padding-top:6px}
}
@media(max-width:600px){
  .research-row{gap:22px;padding:32px 0}
  .research-row p+p{margin-top:.7em}
  html[lang=en] .research-row p{line-height:1.8}
}
@media(prefers-reduced-motion:reduce){
  .research-directory-links a{transition:none}
}
@media print{
  .research-directory{display:none}
  .research-row{break-inside:avoid}
}