:root{
  --bg:#fbfbf8;--surface:#ffffff;--surface-soft:#f4f7f4;--surface-teal:#edf7f3;
  --text:#17201e;--muted:#65716c;--line:#e2e7e3;--line-strong:#d3dcd6;
  --primary:#0f766e;--primary-strong:#095e57;--primary-soft:#dcefe9;--accent:#2d8b83;
  --success:#16866f;--warning:#c98b1f;--danger:#c9554a;
  --shadow-sm:0 8px 26px rgba(23,49,43,.05);--shadow:0 20px 58px rgba(23,49,43,.08);
  --radius:20px;--radius-sm:13px;--max:1320px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);line-height:1.58;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}img{max-width:100%}.container{width:min(calc(100% - 44px),var(--max));margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid rgba(15,118,110,.22);outline-offset:3px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,251,248,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(226,231,227,.92)}.nav{height:72px;display:flex;align-items:center;gap:30px}.brand{display:flex;align-items:center;gap:10px;font-weight:840;font-size:24px;letter-spacing:-.035em}.logo{width:34px;height:34px;display:grid;place-items:center;color:var(--primary)}.logo svg{width:31px;height:31px}.nav-links{margin-left:auto;display:flex;gap:32px;font-size:14px;font-weight:700;color:#35413d}.nav-links a:hover,.nav-links a.active{color:var(--primary)}.nav-actions{display:flex;align-items:center;gap:10px}.mobile-nav{display:none;margin-left:auto}.mobile-nav summary{list-style:none}.mobile-nav summary::-webkit-details-marker{display:none}.mobile-panel{position:absolute;right:20px;top:64px;width:230px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow)}.mobile-panel a{display:block;padding:11px 12px;border-radius:10px;font-weight:700}.mobile-panel a:hover{background:var(--surface-soft)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 19px;border-radius:11px;border:1px solid var(--line-strong);background:#fff;color:var(--text);font-weight:780;box-shadow:0 3px 10px rgba(23,49,43,.025);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm);border-color:#c9d6d0}.btn.primary{color:#fff;background:var(--primary);border-color:var(--primary);box-shadow:0 12px 26px rgba(15,118,110,.14)}.btn.primary:hover{background:var(--primary-strong)}.btn.ghost{background:transparent;box-shadow:none}.btn.subtle{background:var(--surface-soft)}.btn.danger{border-color:#efd0cc;color:var(--danger);background:#fffafa}.btn.wide{width:100%}.btn.small{min-height:38px;padding:0 13px;font-size:13px}.icon-btn{width:42px;padding:0}
.hero{padding:62px 0 40px}.hero-grid{display:grid;grid-template-columns:.88fr 1.12fr;gap:64px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;color:#314039}.eyebrow:before{content:"";width:8px;height:8px;border-radius:999px;background:var(--primary)}.hero h1{font-size:clamp(50px,6.1vw,82px);line-height:1.01;letter-spacing:-.06em;margin:22px 0 22px;max-width:680px}.accent-text{color:var(--primary)}.lede{font-size:18px;color:var(--muted);max-width:610px}.actions{display:flex;flex-wrap:wrap;gap:13px;margin-top:30px}.proof-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.proof-chip{display:inline-flex;align-items:center;gap:8px;padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;font-size:12px;font-weight:720;color:#53605a}.proof-chip:before{content:"✓";color:var(--primary);font-weight:900}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.demo-card{padding:0;overflow:hidden}.demo-header{display:flex;align-items:center;justify-content:space-between;padding:20px 22px;border-bottom:1px solid var(--line)}.demo-header strong{font-size:18px}.live-badge{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:999px;padding:6px 10px;font-size:12px;color:var(--muted)}.live-badge:before{content:"";width:7px;height:7px;border-radius:50%;background:#32ad72}.hero-demo-grid{display:grid;grid-template-columns:1.55fr .9fr}.hero-demo-main{padding:22px}.hero-demo-side{padding:22px;border-left:1px solid var(--line);background:#fcfcfa}.label{display:block;font-size:12px;font-weight:800;color:#56635e;margin-bottom:8px}.prompt-box,.task-box{border:1px solid var(--line);background:#fff;border-radius:11px;padding:12px 14px;color:#35413d}.demo-subtitle{font-weight:820;margin:20px 0 9px}.prob-row{display:grid;grid-template-columns:76px 1fr 44px;align-items:center;gap:11px;margin:12px 0;font-size:13px}.bar{height:9px;border-radius:999px;background:#edf0ed;overflow:hidden}.bar>span{display:block;height:100%;background:var(--primary);border-radius:inherit;transition:width .3s ease}.bar.light>span{background:#a9c8c1}.bar.warm>span{background:#d7b06e}.slider{appearance:none;width:100%;height:5px;background:#e7ebe8;border-radius:999px;outline:none}.slider::-webkit-slider-thumb{appearance:none;width:18px;height:18px;border-radius:50%;background:#fff;border:1px solid #78a8a0;box-shadow:0 3px 10px rgba(0,0,0,.08)}.control-row{display:flex;align-items:center;gap:12px}.control-row output{min-width:44px;text-align:right;font-weight:800}.select{width:100%;min-height:42px;border:1px solid var(--line);border-radius:10px;padding:0 11px;background:#fff}.selected-panel{margin-top:22px;padding:15px;border:1px solid var(--line);border-radius:13px;background:#fbfcfa}.selected-panel .big{font-size:29px;font-weight:860;color:var(--primary);letter-spacing:-.03em}
.section{padding:44px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}.section-kicker{font-size:13px;font-weight:840;color:var(--primary);margin-bottom:6px}.section-title{font-size:31px;letter-spacing:-.04em;margin:0}.section-copy{max-width:640px;margin:7px 0 0;color:var(--muted)}.lesson-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.production-lab-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-card{padding:22px;position:relative;transition:transform .18s ease,box-shadow .18s ease}.lesson-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.lesson-num{font-size:12px;font-weight:800;color:var(--primary);margin-bottom:13px}.lesson-head{display:flex;align-items:center;gap:12px}.icon-box{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;background:var(--surface-teal);color:var(--primary);font-size:22px;border:1px solid #dbece5}.icon-box.warm{background:#fff4da;border-color:#f3e2b6;color:#745619}.icon-box.violet{background:#f1ecfb;border-color:#e2d9f2;color:#65509c}.lesson-card h3{margin:0;font-size:18px}.lesson-card p{margin:6px 0;color:var(--muted);font-size:14px}.mini{min-height:108px;margin-top:18px}.lesson-link{display:inline-flex;align-items:center;gap:7px;margin-top:13px;color:var(--primary);font-size:13px;font-weight:820}.lesson-status{position:absolute;top:18px;right:18px;font-size:11px;font-weight:800;color:var(--muted)}.lesson-status.done{color:var(--success)}.context-bar{height:18px;border-radius:6px;overflow:hidden;display:flex;background:#edf0ed;margin:15px 0}.seg-system{background:#1d756b}.seg-convo{background:#72a79e}.seg-docs{background:#70b9a8}.seg-tools{background:#919d89}.seg-memory{background:#d8a36b}.flow-mini{display:flex;align-items:center;gap:7px;margin-top:17px}.flow-node{flex:1;min-width:45px;padding:10px 6px;text-align:center;border:1px solid var(--line);border-radius:10px;font-size:10px;background:#fff}.flow-arrow{color:#9aa49f}
.method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:18px;overflow:hidden}.method-grid-five{grid-template-columns:repeat(5,minmax(0,1fr))}.method{background:#fff;padding:26px}.method-no{font-size:12px;color:var(--primary);font-weight:900}.method h3{margin:7px 0 5px;font-size:19px}.method p{margin:0;color:var(--muted);font-size:14px}
.roadmap-shell{display:grid;grid-template-columns:1fr 330px;gap:24px;align-items:stretch}.roadmap{display:grid;grid-template-columns:repeat(6,1fr);gap:0;padding:28px 18px}.roadmap-step{padding:0 12px;position:relative}.roadmap-step:not(:last-child):after{content:"";position:absolute;top:18px;left:50%;right:-50%;height:1px;border-top:1px dashed #b8c9c2;z-index:0}.road-num{position:relative;z-index:1;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#e9f3ef;border:1px solid #d6e7e0;color:#345d56;font-size:11px;font-weight:900;margin-bottom:15px}.roadmap-step strong{display:block;font-size:13px}.roadmap-step small{display:block;margin-top:5px;color:var(--muted);font-size:11px;line-height:1.5}.audience-card{padding:24px}.audience-card h3{margin:0 0 15px}.audience-row{display:grid;grid-template-columns:30px 1fr;gap:10px;padding:10px 0;border-top:1px solid var(--line);font-size:13px}.audience-row:first-of-type{border-top:0}.audience-icon{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:var(--surface-soft);color:var(--primary)}
.progress-card{padding:20px 22px;display:flex;align-items:center;gap:18px}.progress-ring{width:62px;height:62px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--primary) var(--progress,0%),#edf0ed 0);position:relative}.progress-ring:after{content:"";position:absolute;width:46px;height:46px;border-radius:50%;background:#fff}.progress-ring strong{position:relative;z-index:1;font-size:12px}.progress-card h3{margin:0 0 2px}.progress-card p{margin:0;color:var(--muted);font-size:13px}
.cta-band{margin:34px auto 66px;padding:34px 38px;background:#eef5f1;border:1px solid #dbe7e1;border-radius:22px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center}.cta-band h2{font-size:28px;letter-spacing:-.04em;margin:0 0 5px}.cta-band p{margin:0;color:var(--muted)}.signup{display:flex;gap:10px;min-width:410px}.input{width:100%;min-height:47px;border:1px solid var(--line-strong);border-radius:11px;padding:0 13px;background:#fff;outline:none}.input:focus{border-color:#81afa7;box-shadow:0 0 0 4px rgba(15,118,110,.08)}.status{font-size:13px;color:var(--muted);margin-top:7px}.status.ok{color:var(--success)}.footer{padding:30px 0 46px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.footer-grid{display:flex;align-items:center;justify-content:space-between;gap:20px}.footer-links{display:flex;gap:18px}
.breadcrumb{font-size:13px;color:var(--muted);margin:34px 0 12px}.breadcrumb a{color:var(--primary);font-weight:760}.lesson-hero{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:end;margin-bottom:24px}.lesson-title-row{display:flex;align-items:center;gap:17px}.lesson-icon{width:70px;height:70px;border-radius:18px;display:grid;place-items:center;background:var(--surface-teal);border:1px solid #d8eae2;color:var(--primary);font-size:30px}.lesson-hero h1{font-size:50px;line-height:1.02;letter-spacing:-.055em;margin:0}.badges{display:flex;flex-wrap:wrap;gap:8px;margin:11px 0}.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 9px;border:1px solid var(--line);border-radius:999px;font-size:11px;font-weight:760;background:#fff}.badge.level{background:#edf8f3;color:var(--primary);border-color:#d9ece4}.lesson-tools{display:flex;gap:8px}.lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 315px;gap:22px}.lesson-grid>*,.agent-main>*{min-width:0}.interactive{padding:20px}.panel-title{display:flex;align-items:center;justify-content:space-between;gap:16px;font-weight:820;font-size:14px}.lesson-sidebar{display:flex;flex-direction:column;gap:15px}.side-card{padding:19px}.side-card h3{margin:0 0 13px;font-size:16px}.check-list{list-style:none;padding:0;margin:0}.check-list li{position:relative;padding-left:24px;margin:10px 0;color:#56645e;font-size:13px}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:900}.steps{list-style:none;margin:0;padding:0}.steps li{display:grid;grid-template-columns:26px 1fr auto;gap:9px;align-items:center;padding:9px 7px;border-radius:10px;color:#65716c;font-size:12px}.steps li.active{background:#eef6f2;color:var(--primary)}.steps li.done{color:#33413c}.step-num{width:24px;height:24px;display:grid;place-items:center;border:1px solid var(--line-strong);border-radius:50%;font-weight:800}.steps .active .step-num{background:var(--primary);color:#fff;border-color:var(--primary)}.quick-answer{padding:18px 20px;margin:0 0 18px;border-left:4px solid var(--primary)}.quick-answer strong{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--primary);margin-bottom:5px}.quick-answer p{margin:0;font-size:16px}.lesson-section{margin-top:18px}.takeaways{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.takeaway{padding:14px;border:1px solid var(--line);border-radius:12px;background:#fff}.takeaway strong{display:block;font-size:13px}.takeaway span{display:block;color:var(--muted);font-size:11px;margin-top:5px}.build-card{margin-top:18px;padding:21px 22px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:22px;background:#f7faf8}.build-card .eyebrow{margin-bottom:6px}.build-card h3{margin:0 0 5px}.build-card p{margin:0;color:var(--muted);font-size:13px}.section-explainer{margin:24px 0;padding:30px 34px;box-shadow:none}.section-explainer h2{font-size:30px;letter-spacing:-.035em;margin:12px 0}.section-explainer h3{font-size:18px;margin:25px 0 8px}.section-explainer p{color:#47544f;max-width:900px}.references{margin-top:24px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.faq{padding:16px;border:1px solid var(--line);border-radius:12px;background:#fbfcfa}.faq strong{display:block;font-size:13px;margin-bottom:5px}.faq p{font-size:12px;margin:0;color:var(--muted)}.next-band{margin:20px 0 58px;padding:19px 21px;display:flex;align-items:center;justify-content:space-between;gap:18px}.subtle{font-size:12px;color:var(--muted)}
.temp-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center}.strategy-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:15px 0}.strategy{min-height:48px;border:1px solid var(--line);border-radius:11px;background:#fff;font-weight:760;color:#4f5e58}.strategy.active{color:var(--primary);border-color:#8ebcb3;background:#f3faf7}.compare-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center}.compare-card{padding:16px;border:1px solid var(--line);border-radius:13px}.compare-card.good{background:#f7fbf8}.compare-card.warn{background:#fffaf3}.context-usage{font-weight:850}.note{padding:12px 14px;border-radius:11px;background:var(--surface-soft);font-size:12px;color:#52615b}.agent-main{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:18px}.agent-flow{display:flex;align-items:center;gap:7px;margin:20px 0;overflow-x:auto;padding-bottom:5px}.agent-node{min-width:84px;padding:13px 9px;border:1px solid var(--line);border-radius:12px;text-align:center;background:#fff;font-size:11px;transition:.2s}.agent-node.active{border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,118,110,.08);color:var(--primary)}.agent-node.done{background:#edf7f3;border-color:#d9ebe4}.timeline{list-style:none;margin:0;padding:0}.timeline li{padding:9px 0 9px 20px;border-left:2px solid #e5e9e6;position:relative;font-size:12px}.timeline li:before{content:"";width:9px;height:9px;border-radius:50%;background:#d9dedb;position:absolute;left:-5.5px;top:14px}.timeline li.active:before{background:var(--primary)}.timeline li.done:before{background:var(--success)}.tool-result{margin-top:14px;padding:12px;border:1px solid var(--line);border-radius:11px;background:#fcfcfa}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.metric{padding:10px;border:1px solid var(--line);border-radius:10px;font-size:11px}.agent-controls{display:grid;gap:8px}.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}.pricing-compare{display:grid;grid-template-columns:1.35fr .8fr;gap:22px}.price-card{padding:25px;position:relative}.price-card.featured{border-color:#91bbb3;box-shadow:0 20px 54px rgba(15,118,110,.11)}.price-card h2{margin:0}.price{font-size:39px;font-weight:880;letter-spacing:-.045em;margin:17px 0}.price small{font-size:13px;color:var(--muted);font-weight:650}.feature-matrix{width:100%;border-collapse:collapse;font-size:12px}.feature-matrix th,.feature-matrix td{padding:11px;border-bottom:1px solid var(--line);text-align:left}.coming{display:grid;gap:10px}.coming-item{display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:10px;padding:11px;border:1px solid var(--line);border-radius:12px;background:#fff;font-size:12px}.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:1040px){.pricing-compare{grid-template-columns:1fr}.hero-grid{grid-template-columns:1fr;gap:35px}.lesson-grid{grid-template-columns:1fr}.lesson-sidebar{display:grid;grid-template-columns:1fr 1fr}.method-grid{grid-template-columns:repeat(2,1fr)!important}.method-grid-five{grid-template-columns:repeat(3,minmax(0,1fr))!important}.roadmap-shell{grid-template-columns:1fr}.roadmap{grid-template-columns:repeat(3,1fr);row-gap:28px}.roadmap-step:nth-child(3):after{display:none}.price-grid{grid-template-columns:1fr}.cta-band{grid-template-columns:1fr}.signup{min-width:0}.agent-main{grid-template-columns:1fr}.takeaways{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.section-head{align-items:stretch;flex-direction:column}.progress-card{width:100%}.container{width:min(calc(100% - 28px),var(--max))}.nav-links,.nav-actions>.btn{display:none}.mobile-nav{display:block}.hero{padding-top:40px}.hero h1{font-size:52px}.hero-demo-grid{grid-template-columns:1fr}.hero-demo-side{border-left:0;border-top:1px solid var(--line)}.lesson-cards,.production-lab-grid,.method-grid,.method-grid-five,.lab-control-grid{grid-template-columns:1fr!important}[data-rag-lab] .interactive>div:nth-of-type(2),[data-agent-reliability-lab] .interactive>div:nth-of-type(2){grid-template-columns:1fr!important}.roadmap{grid-template-columns:1fr 1fr}.roadmap-step:after{display:none}.lesson-hero{grid-template-columns:1fr}.lesson-title-row{align-items:flex-start}.lesson-icon{width:56px;height:56px}.lesson-hero h1{font-size:38px}.lesson-sidebar{grid-template-columns:1fr}.takeaways,.faq-list,.faq-grid{grid-template-columns:1fr}.strategy-row{grid-template-columns:1fr 1fr}.compare-grid{grid-template-columns:1fr}.compare-grid>.flow-arrow{transform:rotate(90deg);text-align:center}.build-card,.next-band{grid-template-columns:1fr;display:grid}.cta-band{padding:26px 22px}.signup{display:grid}.footer-grid{align-items:flex-start;flex-direction:column}.hero-demo-main,.hero-demo-side{padding:18px}.section-explainer{padding:24px 20px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}