:root{--paper:#eef0f0;--ink:#101218;--ink2:#171a21;--text:#16181d;--muted:#4a4e58;--line:#c5cad0;--line-dark:#30333b;--signal:#2842d4;--signal2:#9aa7ff;--gap:#b94b22;--measure:#197454;--max:1240px;--gutter:clamp(20px,4vw,64px);--serif:Georgia,'Times New Roman',serif;--sans:Inter,Arial,sans-serif;--mono:'IBM Plex Mono',Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit}img,svg{max-width:100%;display:block}button,input,textarea{font:inherit}::selection{background:var(--signal);color:white}:focus-visible{outline:2px solid var(--signal);outline-offset:4px}
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.container{width:min(var(--max),100%);margin:auto;padding-inline:var(--gutter)}
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.signal-map{position:relative;min-height:460px;border-left:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(244,243,238,.62);overflow:hidden}.signal-map svg{position:absolute;inset:0;width:100%;height:100%}.map-label{position:absolute;font:10px var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--muted)}.map-label.a{left:8%;top:14%}.map-label.b{right:9%;top:31%}.map-label.c{left:25%;bottom:14%}.map-label.d{right:10%;bottom:8%}.map-core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:120px;height:120px;border:1px solid var(--signal);border-radius:50%;display:grid;place-items:center;text-align:center;font:11px/1.35 var(--mono);text-transform:uppercase;letter-spacing:.08em;background:rgba(244,243,238,.94)}.map-core:after{content:'';position:absolute;inset:14px;border:1px dashed var(--signal);border-radius:50%}.node{position:absolute;width:10px;height:10px;border:1px solid var(--ink);background:var(--paper);z-index:2}.node.n1{left:18%;top:25%}.node.n2{right:17%;top:18%}.node.n3{right:25%;top:65%}.node.n4{left:17%;bottom:23%}.node.n5{left:63%;bottom:13%}.node:after{content:'';position:absolute;inset:2px;background:var(--signal)}
.section{padding-block:clamp(72px,9vw,128px);border-bottom:1px solid var(--line)}.section.dark{background:var(--ink);color:#eceef0;border-color:var(--line-dark);position:relative;overflow:hidden}.section.dark:before{content:'';position:absolute;inset:0;background-image:url('img/contour-field-dark.svg');background-size:cover;background-position:center;pointer-events:none}.section.dark>.container{position:relative;z-index:1}.section.panel{background:#dbe0e3}.section-head{display:grid;grid-template-columns:.65fr 1.35fr;gap:8vw;margin-bottom:54px}.section h2{font:600 clamp(34px,4.4vw,58px)/1.02 var(--serif);letter-spacing:-.035em;margin:0;max-width:14ch}.section-intro{color:var(--muted);max-width:62ch;font-size:18px}.dark .section-intro{color:#999da8}.section-number{font:11px var(--mono);color:var(--signal);text-transform:uppercase;letter-spacing:.13em;margin-bottom:18px}.dark .section-number{color:var(--signal2)}
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.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sales-visual{max-width:640px;margin:8px auto 44px;text-align:center}
.sales-visual svg{width:100%;height:auto;display:block}
.sales-visual figcaption{margin-top:14px;font-family:var(--mono);font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.stat{padding:30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.stat:nth-last-child(-n+5){border-bottom:0}.stat:last-child{border-right:0}.stat-value{font:600 clamp(42px,5vw,68px)/1 var(--mono);letter-spacing:-.05em}.stat-label{margin-top:12px;max-width:28ch;color:var(--muted)}.stat-source{margin-top:15px;font:10px/1.5 var(--mono);color:var(--muted)}
.compare{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line)}.compare-col{padding:34px}.compare-col+ .compare-col{border-left:1px solid var(--line)}.compare-title{font:11px var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--muted);margin-bottom:20px}.compare ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}.compare li{padding-left:20px;position:relative}.compare li:before{content:'+';position:absolute;left:0;color:var(--measure);font-family:var(--mono)}.compare .gap li:before{content:'△';color:var(--gap)}
.chain{border-top:1px solid var(--line)}.chain-row{display:grid;grid-template-columns:92px 180px 1fr 34px;gap:24px;align-items:start;padding:24px 0;border-bottom:1px solid var(--line)}.chain-num,.chain-arrow{font:11px var(--mono);color:var(--signal)}.chain-label{font:600 25px/1.05 var(--serif)}.chain-desc{color:var(--muted);max-width:58ch}.dark .chain{border-color:var(--line-dark)}.dark .chain-row{border-color:var(--line-dark)}.dark .chain-desc{color:#999da8}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.service{background:var(--paper);padding:34px;min-height:260px;display:flex;flex-direction:column}.service-index{font:11px var(--mono);color:var(--signal);margin-bottom:40px}.service h3{font:600 30px/1 var(--serif);margin:0 0 12px}.service p{color:var(--muted);max-width:52ch;margin:0}.service small{margin-top:auto;padding-top:24px;font:11px var(--mono);color:var(--muted)}
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.proof{display:grid;grid-template-columns:1fr 1fr;gap:8vw;align-items:start}.proof-note{border-left:2px solid var(--gap);padding-left:24px;color:var(--muted)}.proof-list{display:grid;gap:10px}.proof-list div{border-top:1px solid var(--line);padding-top:12px;font:12px var(--mono)}
.page-hero{padding-block:100px 78px;border-bottom:1px solid var(--line);position:relative;overflow:hidden}.page-hero:before{content:'';position:absolute;inset:0;background-image:url('img/contour-field-light.svg');background-size:cover;background-position:center;pointer-events:none}.page-hero>.container{position:relative;z-index:1}.page-hero h1{font:600 clamp(46px,6vw,76px)/1 var(--serif);letter-spacing:-.04em;max-width:12ch;margin:0 0 24px}.page-hero p{font-size:20px;color:var(--muted);max-width:68ch}.subtle{font:11px var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--signal)}
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.footer{background:var(--ink);color:#9da1aa;padding-block:68px 28px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:48px;padding-bottom:52px;border-bottom:1px solid var(--line-dark)}.footer-brand{color:#fff;font:600 24px var(--serif)}.footer-copy{max-width:32ch;margin-top:14px}.footer h3{font:11px var(--mono);text-transform:uppercase;letter-spacing:.12em;color:#6f7480;margin:0 0 16px}.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:9px}.footer a{text-decoration:none;color:#9da1aa}.footer a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font:10px var(--mono);color:#666b76}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .65s ease,transform .65s ease}.reveal.visible{opacity:1;transform:none}
@media(max-width:980px){.hero-inner{grid-template-columns:1fr}.signal-map{min-height:380px}.section-head{grid-template-columns:1fr}.decision-grid,.research-grid{grid-template-columns:1fr 1fr}.service-grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2n){border-right:0}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}.nav-links{gap:16px}}
@media(max-width:720px){.stats{grid-template-columns:1fr}.stat,.stat:nth-child(2n){border-right:0;border-bottom:1px solid var(--line)}.stat:last-child{border-bottom:0}.nav-links,.nav-cta{display:none}.nav-toggle{display:block}.hero{min-height:auto}.hero-inner{padding-block:72px}.hero h1{font-size:clamp(45px,14vw,66px)}.signal-map{min-height:320px}.decision-grid,.research-grid,.stats,.compare,.proof,.contact-grid{grid-template-columns:1fr}.stat{border-right:0;border-bottom:1px solid var(--line)}.stat:last-child{border-bottom:0}.compare-col+ .compare-col{border-left:0;border-top:1px solid var(--line)}.chain-row{grid-template-columns:52px 1fr 22px;gap:12px}.chain-desc{grid-column:2/-1}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand-block{grid-column:1/-1}}
.mobile-menu{display:none;padding:8px var(--gutter) 20px;border-top:1px solid var(--line)}.mobile-menu.open{display:grid}.mobile-menu a{padding:14px 0;text-decoration:none;font:12px var(--mono);text-transform:uppercase;border-bottom:1px solid var(--line)}
.faq-list{border-top:none;display:flex;flex-direction:column;gap:14px}.faq-item{border:1px solid var(--line);border-radius:6px;padding:0 24px}.faq-item summary{cursor:pointer;list-style:none;padding:30px 8px;font:600 26px/1.4 var(--serif);display:flex;justify-content:space-between;align-items:center;gap:20px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary::after{content:'+';font:300 34px/1 var(--sans);color:var(--muted);flex:none;transition:transform .25s ease}.faq-item[open] summary::after{transform:rotate(45deg)}.faq-item p{margin:0 8px 30px;color:var(--muted);max-width:75ch;font-size:19px;line-height:1.7}
.status-line{display:flex;align-items:center;gap:12px;margin-top:24px;padding:16px 20px;border:1px solid var(--line);border-radius:6px;font-size:15px;color:var(--muted)}.status-dot{width:9px;height:9px;border-radius:50%;background:var(--signal);flex:none}