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/* Focused evidence for the lobby drag interaction iteration. */
.case-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:22px 0 24px}
.case-comparison figure{min-width:0;margin:0}
.case-comparison figcaption{margin-bottom:10px}
.case-comparison strong{color:var(--primary);font-size:12px;font-weight:500}
.case-comparison figcaption p{margin-top:5px;font-size:11px;line-height:1.7;color:var(--muted)}
.comparison-shot{aspect-ratio:2.4;max-height:none}
.comparison-shot img{width:100%;height:100%;object-fit:contain}
.comparison-shot span{opacity:1;transform:none}
@media(max-width:600px){.case-comparison{grid-template-columns:1fr;gap:22px}}

/* Progressive disclosure for the Wanxiangqi case study. */
.case-systems .case-secondary-list{gap:56px;margin-top:32px}
.case-systems .case-secondary-list>article+article{padding-top:36px;border-top:1px solid var(--stroke)}
.case-systems .secondary-copy .feature-kicker{margin-top:0;margin-bottom:6px}
.case-disclosure{border-top:1px solid var(--stroke);font-size:12px}
.case-disclosure summary{padding:12px 0;color:var(--secondary);cursor:pointer}
.case-disclosure summary:hover,.case-other-item summary:hover strong{color:var(--primary)}
.case-disclosure summary:focus-visible,.case-other-item summary:focus-visible{outline:2px solid #8d7a3c;outline-offset:4px;border-radius:3px}
.case-disclosure-body{padding:4px 0 20px}
.case-disclosure-body>.secondary-copy{margin-bottom:16px}
.case-disclosure-body>.secondary-gallery+.secondary-copy{margin:16px 0 0}
.case-evidence-shot{height:230px;max-height:none}
.case-evidence-shot img{height:100%;object-fit:cover;object-position:top center}
.case-feature-evidence video{display:block;width:100%;height:230px;object-fit:cover;border-radius:9px;background:#111}
.case-other{margin-top:56px;padding-top:30px;border-top:1px solid var(--stroke)}
.case-other h2{color:var(--primary);font-size:17px}
.case-other>p{margin-top:6px;font-size:12px}
.case-other-list{margin-top:20px}
.case-other-item{border-bottom:1px solid var(--stroke)}
.case-other-item summary{display:flex;align-items:center;gap:14px;padding:18px 0;list-style:none;cursor:pointer}
.case-other-item summary::-webkit-details-marker{display:none}
.case-other-item summary>img{flex-shrink:0;width:68px;height:68px;object-fit:cover;object-position:top;border-radius:5px;background:#090909}
.case-other-copy{flex:1;min-width:0}
.case-other-copy strong{display:block;color:var(--primary);font-size:13px;font-weight:400}
.case-other-copy>span{display:block;margin-top:4px;font-size:11px;line-height:1.7}
.case-expand-label{flex-shrink:0;color:var(--muted);font-size:11px}
.case-expand-label::before{content:'展开 +'}
.case-other-item[open] .case-expand-label::before{content:'收起 −'}
.case-systems .case-closing{margin-top:40px}
@media(max-width:520px){.case-systems .case-secondary-list{gap:40px}.case-systems .case-secondary-list>article+article{padding-top:28px}.case-other-item summary{gap:10px}.case-other-item summary>img{width:48px;height:60px}.case-expand-label{font-size:10px}.case-evidence-shot,.case-feature-evidence video{height:210px}}