:root{
  --ink:#16262c;
  --ink-soft:#40575e;
  --ink-faint:#6f858c;
  --paper:#f4f7f6;
  --surface:#ffffff;
  --surface-soft:#edf4f2;
  --line:#d8e2e1;
  --line-soft:#e7eeed;
  --pine:#0c6b5c;
  --pine-deep:#084a40;
  --pine-bright:#42b99d;
  --pine-tint:#e7f2ef;
  --safe-red:#9f3a38;
  --safe-red-tint:#f8eceb;
  --shadow:0 14px 36px rgba(22,38,44,.08);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit}
button{font:inherit}
.wrap{width:min(1180px,calc(100% - 48px));margin:0 auto}

.hero{padding:76px 0 82px;background:var(--paper)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(390px,.92fr);gap:72px;align-items:center}
.eyebrow,.section-kicker{margin:0 0 15px;color:var(--pine);font-family:var(--mono);font-size:13px;font-weight:750;letter-spacing:0;text-transform:uppercase}
h1{max-width:720px;margin:0;color:var(--ink);font-size:58px;font-weight:720;letter-spacing:0;line-height:1.08}
.hero-question{margin:24px 0 7px;color:var(--pine-deep);font-size:22px;font-weight:700}
.hero-lead{max-width:680px;margin:0;color:var(--ink-soft);font-size:18px;line-height:1.72}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:31px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 17px;border:1px solid transparent;border-radius:8px;font-size:14px;font-weight:750;text-decoration:none}
.button.primary{background:var(--pine);color:#fff}
.button.primary:hover{background:var(--pine-deep)}
.button.secondary{border-color:var(--line);background:#fff;color:var(--pine-deep)}
.button.secondary:hover{border-color:var(--pine);background:var(--pine-tint)}

.workflow-visual{position:relative;min-height:410px}
.workflow-ring{position:absolute;inset:38px;border:1px solid #b8cec8;border-radius:50%}
.workflow-center{position:absolute;left:50%;top:50%;z-index:4;display:flex;width:142px;height:142px;transform:translate(-50%,-50%);align-items:center;justify-content:center;flex-direction:column;border-radius:50%;background:var(--pine-deep);color:#fff;box-shadow:0 18px 44px rgba(8,74,64,.23)}
.workflow-center strong{font-family:var(--mono);font-size:19px;letter-spacing:0;white-space:nowrap}
.workflow-star{font-size:38px;line-height:.95}
.workflow-node{position:absolute;z-index:5;display:flex;width:126px;min-height:76px;padding:12px;align-items:center;justify-content:center;flex-direction:column;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 9px 24px rgba(22,38,44,.08);text-align:center}
.workflow-node b{font-size:15px}
.node-record{left:0;top:42px}.node-image{right:0;top:28px}.node-tool{right:5px;bottom:30px}.node-safe{left:8px;bottom:17px}

section{padding:82px 0}
.section-heading{max-width:760px;margin-bottom:38px}
.section-heading h2{margin:0 0 14px;font-size:44px;font-weight:720;letter-spacing:0;line-height:1.18}
.section-heading>p:last-child{margin:0;color:var(--ink-soft);font-size:19px;line-height:1.72}
.concepts,.examples{background:#fff}
.concept-grid{display:grid;grid-template-columns:repeat(3,1fr)}
.concept-item{min-height:170px;padding:24px 26px;border-right:1px dashed #b8cec8}
.concept-item:last-child{border-right:0}
.approach-grid>li>span{color:var(--pine);font-family:var(--mono);font-size:14px;font-weight:800;letter-spacing:0}
.concept-item h3{margin:0 0 9px;font-size:25px;line-height:1.35}
.concept-item p{margin:0;color:var(--ink-soft);font-size:17px;line-height:1.65}

.comparison{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface-soft)}
.compare-grid{display:grid;grid-template-columns:1fr 54px 1fr;align-items:stretch}
.compare-card{padding:29px;border:1px solid var(--line);border-radius:8px;background:#fff}
.muted-card{background:rgba(255,255,255,.6)}
.workflow-card{border-color:#b7d2cb;box-shadow:0 0 0 1px rgba(12,107,92,.04)}
.card-label{margin:0;color:var(--pine);font-family:var(--mono);font-size:12px;font-weight:750;text-transform:uppercase}
.compare-card h3{margin:17px 0 8px;font-size:24px;line-height:1.35}
.compare-card>p:not(.card-label){margin:0;color:var(--ink-soft);font-size:16px;line-height:1.65}
.compare-card blockquote{margin:23px 0 0;padding:16px;border-left:3px solid #b8c8c5;background:#f7f9f8;color:var(--ink-soft);font-size:15px;line-height:1.65}
.versus{display:grid;place-items:center;color:var(--ink-faint);font-family:var(--mono);font-size:11px;font-weight:750}
.mini-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:7px;align-items:center;margin-top:23px}
.mini-flow span{padding:9px 6px;border-radius:6px;background:var(--pine-tint);color:var(--pine-deep);font-size:13px;font-weight:700;text-align:center}
.mini-flow i{color:var(--pine);font-style:normal}

.approach{background:var(--paper)}
.approach-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:0;padding:0;list-style:none}
.approach-grid li{min-height:172px;padding:25px;border:1px solid var(--line);border-radius:8px;background:#fff}
.approach-grid h3{margin:20px 0 7px;font-size:21px;line-height:1.35}
.approach-grid p{margin:0;color:var(--ink-soft);font-size:16px;line-height:1.65}

.examples-heading{display:flex;align-items:end;justify-content:space-between;gap:30px}
.examples-heading .section-heading{margin-bottom:14px}
.example-list{display:flex;flex-direction:column;gap:0}
.example-group{display:flex;flex-direction:column;gap:12px;padding:0}
.example-group+.example-group{margin-top:12px;padding-top:12px;border-top:1px dashed #b9ccc7}
.example-group-heading{display:grid;grid-template-columns:minmax(220px,.55fr) minmax(0,1fr);gap:24px;align-items:baseline}
.example-group-heading h3{margin:0;font-size:21px;line-height:1.4}
.example-group-heading p{margin:0;color:var(--ink-soft);font-size:15px;line-height:1.65}
.example-group-list{display:flex;flex-direction:column;gap:16px}
.example-card{overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 5px 18px rgba(22,38,44,.05)}
.example-card summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:23px 25px;cursor:pointer;list-style:none}
.example-card summary::-webkit-details-marker{display:none}
.example-summary{display:flex;align-items:center;min-width:0}
.example-title{min-width:0}
.example-title strong{display:block;font-size:20px;line-height:1.4}
.example-title span{display:block;color:var(--ink-faint);font-size:14px;line-height:1.5}
.example-toggle{display:grid;flex:0 0 auto;width:30px;height:30px;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--pine-deep);transition:transform .18s ease}
.example-card[open] .example-toggle{transform:rotate(45deg)}
.example-content{padding:26px;border-top:1px solid var(--line);background:#f8fbfa}
.example-intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
.example-intro-grid>.example-panel:last-child{grid-column:1/-1}
.example-panel{padding:20px;border:1px solid var(--line);border-radius:7px;background:#fff}
.example-panel h4{margin:0 0 9px;font-size:17px;line-height:1.4}
.example-panel p{margin:0;color:var(--ink-soft);font-size:15px;line-height:1.68}
.example-panel .example-review-note{margin-top:7px;color:#7b5d14;font-size:13px;font-weight:650}
.example-panel ul,.output-list{margin:0;padding-left:19px;color:var(--ink-soft);font-size:15px;line-height:1.68}
.example-section{margin-top:22px;padding:18px 0 0;border-top:1px solid var(--line)}
.example-section-heading{max-width:820px;margin-bottom:13px}
.example-section-heading h4{margin:0;font-size:19px;line-height:1.4}
.example-section-heading p{margin:6px 0 0;color:var(--ink-soft);font-size:14px;line-height:1.65}
.stage-list{display:flex;flex-direction:column;gap:10px}
.stage-guide{display:grid;grid-template-columns:minmax(170px,.72fr) minmax(210px,1.2fr) minmax(145px,.82fr) minmax(170px,.9fr);gap:14px;padding:17px;border:1px solid var(--line);border-radius:7px;background:#fff}
.stage-heading{display:flex;min-width:0;align-items:baseline;gap:10px}
.stage-id{flex:0 0 auto;color:var(--pine);font-family:var(--mono);font-size:15px;font-weight:800}
.stage-heading h4{margin:0;font-size:17px;line-height:1.4}
.stage-cell{min-width:0;color:var(--ink-soft);font-size:14px;line-height:1.62}
.stage-cell b{display:block;margin-bottom:4px;color:var(--ink);font-size:12px;text-transform:uppercase}
.stage-cell.safety{padding-left:11px;border-left:2px solid #d7aaa7}
.deliverable-list{display:grid;gap:10px}
.deliverable-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(250px,.72fr);gap:24px;padding:17px;align-items:start;border:1px solid var(--line);border-radius:7px;background:#fff}
.deliverable-copy strong{display:block;font-size:17px;line-height:1.4}
.deliverable-copy p{margin:6px 0 0;color:var(--ink-soft);font-size:14px;line-height:1.65}
.deliverable-files{display:flex;min-width:0;align-items:flex-start;flex-wrap:wrap;gap:6px}
.deliverable-files>span{width:100%;color:var(--ink-faint);font-family:var(--mono);font-size:11px;font-weight:750;text-transform:uppercase}
.deliverable-files code{max-width:100%;padding:4px 7px;overflow-wrap:anywhere;border:1px solid #cfddd9;border-radius:4px;background:#fff;color:var(--pine-deep);font-family:var(--mono);font-size:11px;line-height:1.4}
.example-global-safety{border-top-color:#e4c7c4}
.example-safety-list{display:grid;gap:10px}
.example-safety-rule{display:grid;grid-template-columns:150px minmax(0,1fr);gap:22px;padding:17px;border:1px solid #e4c7c4;border-left:3px solid #c66b65;border-radius:7px;background:#fffafa}
.example-safety-rule.human{border-color:#e4d5a4;border-left-color:#b18b2d;background:#fffdf6}
.safety-rule-type{font-size:13px;line-height:1.45}
.example-safety-rule.critical .safety-rule-type{color:var(--safe-red)}
.example-safety-rule.human .safety-rule-type{color:#6f5818}
.safety-rule-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.safety-rule-fields div{min-width:0}
.safety-rule-fields b{display:block;margin-bottom:4px;color:var(--ink);font-size:12px;line-height:1.4}
.safety-rule-fields p{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.62}
.example-footer{display:flex;align-items:center;justify-content:flex-start;gap:20px;margin-top:24px}
.example-links{display:flex;flex-wrap:wrap;gap:10px}
.text-link{display:inline-flex;align-items:center;min-height:40px;padding:8px 13px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--pine-deep);font-size:14px;font-weight:700;text-decoration:none}
.text-link:hover{border-color:var(--pine);background:var(--pine-tint)}
.text-link.is-disabled{border-color:#d8dfdd;background:#f1f4f3;color:var(--ink-faint);cursor:not-allowed}
.text-link.is-disabled:hover{border-color:#d8dfdd;background:#f1f4f3}

.community{border-top:1px solid var(--line);background:var(--paper)}
.community-stack{border-top:1px solid var(--line)}
.community-group{padding:32px 0 44px}
.community-group+.community-group{border-top:1px solid var(--line)}
.community-label{margin:0;color:var(--pine);font-family:var(--mono);font-size:10.5px;font-weight:700;letter-spacing:0;text-transform:uppercase}
.community-group h3{margin:13px 0 7px;font-size:22px}
.community-group>p:not(.community-label){max-width:520px;margin:0;color:var(--ink-soft);font-size:14px}
.community-roster{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));grid-auto-rows:1fr;gap:30px 18px;margin-top:30px}
.expert-profile,.institution-profile{display:flex;min-width:0;align-items:center;flex-direction:column;text-align:center}
.community-avatar-link{display:block;line-height:0}
.expert-profile .community-avatar-link{border-radius:50%}
.institution-profile .community-avatar-link{border-radius:8px}
.community-avatar-link[href]:hover img{border-color:var(--pine);box-shadow:0 7px 20px rgba(8,74,64,.14)}
.expert-profile img,.institution-profile img{display:block;flex:0 0 auto;object-fit:cover;border:1px solid #c8d8d4;background:#fff}
.expert-profile img{width:88px;height:88px;border-radius:50%}
.institution-profile img{width:96px;height:96px;border-radius:8px}
.expert-profile h4,.institution-profile h4{max-width:100%;margin:13px 0 0;overflow-wrap:anywhere;color:var(--ink);font-size:15px;line-height:1.35}
.expert-profile p{max-width:100%;margin:5px 0 0;overflow-wrap:anywhere;color:var(--pine-deep);font-size:13px;font-weight:650;line-height:1.35}
.expert-profile span{max-width:100%;margin-top:4px;overflow-wrap:anywhere;color:var(--ink-faint);font-size:12px;line-height:1.4}
.institution-profile h4{color:var(--pine-deep)}

a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(12,107,92,.3);outline-offset:3px}

@media(max-width:940px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  h1{font-size:50px}.section-heading h2{font-size:40px}
  .workflow-visual{width:min(520px,100%);min-height:360px;margin:0 auto}
  .concept-grid{grid-template-columns:1fr}
  .concept-item{min-height:auto;border-right:0;border-bottom:1px dashed #b8cec8}
  .concept-item:last-child{border-bottom:0}
  .compare-grid{grid-template-columns:1fr}.versus{min-height:48px}
  .approach-grid{grid-template-columns:repeat(2,1fr)}
  .stage-guide{grid-template-columns:minmax(170px,.72fr) minmax(0,1.28fr)}.stage-cell{grid-column:2}.stage-cell.safety{padding-top:9px;padding-left:0;border-top:1px solid #ead4d2;border-left:0}
  .deliverable-row,.example-safety-rule{grid-template-columns:1fr}
  .community-roster{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media(max-width:620px){
  .wrap{width:min(100% - 30px,1180px)}
  .hero{padding:53px 0 64px}h1{font-size:39px}.hero-question{font-size:19px}.hero-lead{font-size:16px}
  .hero-actions .button{width:100%}
  .workflow-visual{min-height:310px}.workflow-ring{inset:35px}
  .workflow-center{width:112px;height:112px}.workflow-node{width:96px;min-height:66px;padding:8px}.workflow-node b{font-size:12px}.node-record{top:18px}.node-image{top:12px}.node-tool{bottom:15px}.node-safe{bottom:8px}
  section{padding:64px 0}.section-heading h2{font-size:34px}.section-heading>p:last-child{font-size:17px}
  .mini-flow{grid-template-columns:1fr;gap:6px}.mini-flow i{line-height:1;text-align:center;transform:rotate(90deg)}
  .approach-grid{grid-template-columns:1fr}.approach-grid li{min-height:auto}
  .example-group-heading{grid-template-columns:1fr;gap:6px}
  .example-card summary{padding:18px}.example-title strong{font-size:18px}
  .example-content{padding:16px}.example-intro-grid{grid-template-columns:1fr}.example-section{margin-top:18px;padding:16px 0 0}.stage-guide{grid-template-columns:1fr}.stage-cell{grid-column:1}.safety-rule-fields{grid-template-columns:1fr;gap:14px}
  .example-footer{align-items:stretch;flex-direction:column}
  .community-roster{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 14px}
  .expert-profile img{width:80px;height:80px}.institution-profile img{width:88px;height:88px}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.example-toggle{transition:none}}