/* 视觉豁免:官网自有纸色、衬线、墨阶体系(2026-10-22 定) */
/* Cooperation hub and /cooperate/experts/. Builds on site.css. */
/* hub: the two institutional ways as a compact pair under the four cards; the expert summary */
.cooperate-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:48px;margin-top:64px;padding-top:40px;border-top:1px solid var(--line)}
.cooperate-pair h3{font-size:21px;margin-bottom:12px}.cooperate-pair p,.cooperate-brief p{max-width:40em;font-size:16px;line-height:1.9;color:var(--muted)}
.cooperate-brief .actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px;margin-top:28px}
.expert-track>.section-label{margin-bottom:14px}
.expert-track>.section-intro{max-width:760px}
.expert-quote{max-width:34em;margin:8px 0 56px}
.expert-steps{grid-template-columns:repeat(3,minmax(0,1fr));margin:0}
.part-group+.part-group{margin-top:26px}
.group-label{font-size:13px;color:var(--muted);margin-bottom:10px}
.part-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.part{border:1px solid var(--line);background:#fff;padding:18px 18px 20px}
.is-held .part{background:var(--tint);border-color:#cfd6c6}
.part h4,.criterion h4,.direction h4{margin:0}
.part h4{font-size:18px;font-weight:600;line-height:1.5}
.part .part-as{font-size:12px;color:var(--accent);margin:4px 0 10px}
.part p:last-child{font-size:14px;line-height:1.75;color:var(--muted)}
.expert-note{margin-top:22px;font-size:15px;border-left:2px solid var(--accent);padding-left:16px}
.fit-table{width:100%;font-size:15px;line-height:1.7}
.fit-table th{font-size:13px;font-weight:500;color:var(--muted);padding:0 16px 10px 0;border-bottom:1px solid #000;width:50%}
.fit-table td{padding:13px 16px 13px 0;border-bottom:1px solid var(--line)}
.fit-table td:last-child{color:var(--muted)}
.difficulty{margin-top:22px}
.criteria{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 40px}
.criterion{border-top:1px solid #9a9e91;padding-top:16px}
.criterion h4{font-size:18px;margin-bottom:6px}.criterion p{font-size:14px;color:var(--muted)}
.curve-figure{margin:36px 0 0;min-width:0;max-width:760px}.curve-panels{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.curve-figure svg{display:block;width:100%;height:auto}
.curve-figure figcaption{font-size:13px;line-height:1.8;color:var(--muted);margin-top:8px}
.curve-legend{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:6px;color:var(--ink)}.curve-legend .key-note{color:var(--muted);margin-left:14px}
.curve-legend .key{display:inline-block;width:18px;height:2px;background:#243d34}.curve-legend .key-base{background:#9aa294;margin-left:14px}
.direction-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.direction{border-top:1px solid #9a9e91;padding-top:16px}
.direction h4{font-size:17px;margin-bottom:8px}.direction p{font-size:14px;color:var(--muted)}
.expert-cta{margin-top:48px}.expert-cta .actions{margin-top:8px}.expert-cta p{max-width:44em}
.expert-grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 48px}
.expert-sub{font-family:var(--serif);font-size:clamp(24px,2.4vw,30px);font-weight:600;line-height:1.3;margin:80px 0 28px}
.expert-prose{margin-top:32px}.intro-grid>.expert-prose{margin-top:0}.expert-prose>h3:first-child{margin-top:0}
.sample-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px}
.sample{border-top:1px solid var(--line);padding:22px 0 26px}
.sample-tag{font-size:12px;color:var(--muted)}
.sample h3{font-size:21px;margin:6px 0 10px}
.sample p{font-size:15px}.sample .sample-score{font-size:13px;color:var(--accent);margin-top:10px}
.question-list{counter-reset:q;list-style:none;padding:0;max-width:46em}
.question-list li{counter-increment:q;display:grid;grid-template-columns:44px 1fr;padding:14px 0;border-top:1px solid var(--line);margin:0;font-size:17px}
.question-list li:before{content:counter(q,decimal-leading-zero)}
/* one numbering style for every ordered list on cooperation pages */
.steps li:before,.question-list li:before{font:400 13px/2 var(--sans);font-variant-numeric:tabular-nums;color:var(--muted)}
@media(max-width:1100px){.part-grid,.direction-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:800px){.cooperate-pair{grid-template-columns:1fr;gap:32px}.expert-steps,.expert-grid-2,.sample-list,.criteria{grid-template-columns:1fr}.curve-legend .key-note{margin-left:0;flex-basis:100%}.fit-table{font-size:14px}}
@media(max-width:600px){.curve-panels{grid-template-columns:1fr;gap:12px}.part{padding:14px 14px 16px}.part h4{font-size:16px}}
@media(max-width:420px){.direction-grid{grid-template-columns:1fr}}