.brain-page{max-width:1500px;margin:0 auto;padding:34px clamp(18px,4vw,54px) 80px}
.brain-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(340px,.75fr);gap:18px;margin-bottom:18px}
.brain-hero__copy,.brain-hypothesis{border-radius:30px;overflow:hidden;position:relative;box-shadow:var(--shadow)}
.brain-hero__copy{padding:48px clamp(26px,4vw,54px);background:linear-gradient(135deg,#14221e 0%,#1c322a 60%,#263d34 100%);color:#eff7f2}
.brain-hero__copy:before{content:"脑";position:absolute;right:-12px;bottom:-58px;font:700 250px/1 var(--serif);color:rgba(255,255,255,.035)}
.brain-hero__copy>span,.brain-hypothesis>span,.brain-search-header span{font:700 10px var(--mono);letter-spacing:.18em;color:#96ddc2}
.brain-hero__copy h1{position:relative;max-width:980px;margin:18px 0 22px;font:700 clamp(34px,4vw,62px)/1.23 var(--serif);letter-spacing:-.035em}
.brain-hero__copy p{position:relative;max-width:880px;margin:0;color:rgba(239,247,242,.76);font-size:15px;line-height:2}
.brain-hero__actions{position:relative;display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.brain-hero__actions button{border-radius:999px;padding:12px 17px}
.brain-hero__actions .primary-button{background:#f4faf6;color:#182720;border-color:#f4faf6}
.brain-hero__actions .quiet-button{background:rgba(255,255,255,.06);color:#eef7f1;border-color:rgba(255,255,255,.18)}
.brain-hypothesis{padding:36px;background:linear-gradient(180deg,#fffefb,#f2ede3);border:1px solid rgba(184,173,154,.55)}
.brain-hypothesis>span{color:var(--cinnabar)}
.brain-hypothesis h2{margin:22px 0 18px;font:700 29px/1.58 var(--serif);color:var(--ink)}
.brain-hypothesis p{margin:0;color:var(--muted);font-size:12px;line-height:1.95}
.brain-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.brain-stats article{padding:22px 24px;border-radius:22px;border:1px solid rgba(184,173,154,.52);background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(246,242,235,.97));box-shadow:var(--shadow)}
.brain-stats span{font:700 10px var(--mono);letter-spacing:.12em;color:var(--cinnabar)}
.brain-stats b{display:block;margin:14px 0 4px;font:700 36px var(--serif)}
.brain-stats p{margin:0;color:var(--muted);font-size:11px}
.brain-evidence-architecture,.brain-search-section,.mri-mapping-section,.prework-section{margin-bottom:18px;padding:38px clamp(20px,3vw,42px);border-radius:28px;border:1px solid rgba(184,173,154,.52);background:linear-gradient(180deg,rgba(255,255,255,.94),rgba(247,243,236,.98));box-shadow:var(--shadow)}
.brain-layer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}
.brain-layer-grid article{min-height:218px;padding:24px;border-radius:22px;border:1px solid rgba(184,173,154,.48);background:linear-gradient(180deg,#fffefb,#f5f0e7);position:relative}
.brain-layer-grid article>b{font:700 11px var(--mono);color:var(--cinnabar)}
.brain-layer-grid h3{margin:22px 0 12px;font:700 21px var(--serif)}
.brain-layer-grid p{margin:0;color:var(--muted);font-size:12px;line-height:1.9}
.brain-layer-grid article>span{position:absolute;right:18px;bottom:16px;padding:5px 9px;border-radius:999px;background:var(--jade-soft);color:var(--jade);font-size:10px;font-weight:800}
.brain-search-header{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:22px}
.brain-search-header span{color:var(--cinnabar)}
.brain-search-header h2{margin:9px 0 0;font:700 36px var(--serif)}
.brain-search-header p{max-width:520px;margin:0;color:var(--muted);font-size:12px;line-height:1.8}
.brain-search-box{display:grid;grid-template-columns:1fr auto;border:1px solid rgba(184,173,154,.64);border-radius:20px;overflow:hidden;background:#fffefb;box-shadow:0 14px 34px rgba(18,28,24,.07)}
.brain-search-box input{min-height:68px;padding:0 20px;border:0;background:transparent;font-size:15px}
.brain-search-box button{margin:10px;border-radius:14px;min-width:140px}
.brain-suggestions{display:flex;flex-wrap:wrap;gap:8px;margin-top:13px}
.brain-suggestions button{padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:#faf7f1;color:var(--muted);font-size:10px}
.brain-suggestions button:hover{border-color:var(--jade);color:var(--jade)}
.brain-filter-row{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr auto;gap:9px;margin-top:18px}
.brain-filter-row select,.brain-filter-row button{min-height:42px;border-radius:12px}
.brain-filter-row select{padding:0 11px;border:1px solid var(--line);background:#fffefb;font-size:11px}
.brain-result-toolbar{display:flex;justify-content:space-between;align-items:center;margin:24px 0 14px;padding:15px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.brain-result-toolbar>div:first-child{display:flex;align-items:baseline;gap:7px}.brain-result-toolbar b{font:700 27px var(--mono)}.brain-result-toolbar span{font-size:11px}.brain-result-toolbar small{margin-left:8px;color:var(--muted)}
.brain-result-toolbar button{border-radius:999px;padding:9px 14px}
.brain-results{display:grid;gap:13px}
.brain-evidence-card{border:1px solid rgba(184,173,154,.52);border-radius:22px;overflow:hidden;background:linear-gradient(180deg,#fffefc,#f8f4ed);box-shadow:0 9px 28px rgba(23,34,29,.045)}
.brain-evidence-card header{display:flex;justify-content:space-between;align-items:center;padding:13px 16px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.55)}
.brain-evidence-card header>div{display:flex;gap:7px;align-items:center}.brain-evidence-card header small{color:var(--muted);font-size:10px}
.brain-layer,.brain-topic-tag{padding:5px 8px;border-radius:999px;font-size:9px;font-weight:800}.brain-layer.layer-A{background:var(--cinnabar-soft);color:var(--cinnabar)}.brain-layer.layer-B{background:var(--jade-soft);color:var(--jade)}.brain-layer.layer-C{background:var(--gold-soft);color:var(--gold)}.brain-topic-tag{background:#edf0ea;color:#56665e}
.brain-evidence-card h3{margin:18px 18px 5px;font:700 18px/1.55 var(--serif)}
.brain-meta{margin:0 18px;color:var(--muted);font-size:10px}
.brain-evidence-card blockquote{margin:0;padding:16px 18px 12px;font:15px/2.05 var(--serif);color:#33433c}
.brain-evidence-card mark{background:#f0d89e;color:inherit;padding:0 1px}
.brain-term-row{display:flex;gap:6px;flex-wrap:wrap;padding:0 18px 14px}.brain-term-row span{padding:4px 7px;border-radius:999px;background:#e9f0ec;color:#5a6c63;font-size:9px}
.brain-research-map{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#f1ece2}
.brain-research-map p{margin:0;padding:13px 16px;color:#5f6e67;font-size:11px;line-height:1.75}.brain-research-map p:first-child{border-right:1px solid var(--line)}.brain-research-map b{display:block;margin-bottom:4px;color:var(--ink);font:700 12px var(--serif)}
.brain-evidence-card details{padding:10px 16px 13px}.brain-evidence-card summary{cursor:pointer;color:var(--jade);font-size:10px;font-weight:700}.brain-context{margin-top:12px;padding:14px;border-radius:14px;background:#ede8de;white-space:pre-wrap;font:12px/1.95 var(--serif);color:var(--ink-2)}.brain-evidence-card code{display:block;margin-top:9px;color:var(--muted);font-size:9px;word-break:break-all}
.mri-domain-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.mri-domain-grid article{min-height:300px;padding:22px;border-radius:22px;border:1px solid rgba(184,173,154,.5);background:linear-gradient(180deg,#182721,#22372f);color:#eef6f1;position:relative;overflow:hidden}
.mri-domain-grid article:after{content:"";position:absolute;right:-35px;bottom:-35px;width:140px;height:140px;border:1px solid rgba(143,221,192,.12);border-radius:50%}
.mri-domain-grid>article>span{font:700 10px var(--mono);color:#8cddbe}.mri-domain-grid h3{margin:22px 0 14px;font:700 21px var(--serif)}.mri-domain-grid blockquote{margin:0 0 17px;padding:11px 0;border-top:1px solid rgba(255,255,255,.12);border-bottom:1px solid rgba(255,255,255,.12);font:700 17px/1.6 var(--serif);color:#dcebe4}.mri-domain-grid p{margin:0;color:rgba(238,246,241,.68);font-size:11px;line-height:1.85}.mri-domain-grid p b{color:#f0f6f2}.mri-domain-grid small{position:absolute;left:22px;right:22px;bottom:18px;color:#86cdb2;font-size:9px;letter-spacing:.06em}
.prework-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.prework-grid article{min-height:170px;padding:22px;border-radius:20px;border:1px solid rgba(184,173,154,.5);background:#fffdf9}.prework-grid b{font:700 18px var(--serif)}.prework-grid p{margin:13px 0 0;color:var(--muted);font-size:12px;line-height:1.9}
@media(max-width:1180px){.brain-hero{grid-template-columns:1fr}.brain-layer-grid,.brain-stats,.prework-grid{grid-template-columns:1fr 1fr}.mri-domain-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:860px){.brain-page{padding:24px 16px 60px}.brain-hero__copy{padding:38px 24px}.brain-hero__copy h1{font-size:38px}.brain-search-header{display:block}.brain-search-header p{margin-top:12px}.brain-filter-row{grid-template-columns:1fr 1fr}.mri-domain-grid{grid-template-columns:1fr 1fr}.brain-research-map{grid-template-columns:1fr}.brain-research-map p:first-child{border-right:0;border-bottom:1px solid var(--line)}}
@media(max-width:560px){.brain-stats,.brain-layer-grid,.prework-grid,.mri-domain-grid{grid-template-columns:1fr}.brain-search-box{grid-template-columns:1fr}.brain-search-box button{min-height:48px}.brain-filter-row{grid-template-columns:1fr}.brain-result-toolbar{display:block}.brain-result-toolbar>div:last-child{margin-top:12px}.brain-hero__copy h1{font-size:31px}.brain-hypothesis h2{font-size:24px}}