/* =========================================================================
   AUTONOMOUS SEARCH — brand system v4 (final art direction)
   Predominantly dark, off-white editorial sections. Cold steel blue, ~4%.
   ========================================================================= */

:root{
  --black:#080a0c; --black-2:#0e1114; --black-3:#14181c;
  --white:#f2f2ee; --white-2:#e9e9e4; --white-3:#dedeD8;
  --steel:#78a7d8; --steel-hot:#9cc4ee; --steel-dk:#3769b2;
  --bg:var(--black); --bg-alt:var(--black-2); --ink:#f3f4f2;
  --ink-2:#8d949c; --ink-3:#6f767e; --ink-4:#4a5158;
  --line:rgba(255,255,255,.12); --line-2:rgba(255,255,255,.06);
  --signal:var(--steel); --wash:rgba(120,167,216,.06);
  --sans:"Archivo",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --t-h1:clamp(2.15rem,4.15vw,4.1rem);
  --t-h2:clamp(1.8rem,3.3vw,3.1rem);
  --t-h3:clamp(1.15rem,1.7vw,1.6rem);
  --t-lead:clamp(1.08rem,1.4vw,1.42rem);
  --t-body:clamp(1rem,1.03vw,1.06rem);
  --t-label:clamp(.66rem,.75vw,.75rem);
  --gut:clamp(1.4rem,4vw,4.2rem);
  --maxw:1600px; --sec-y:clamp(5rem,11vh,9.5rem);
  --ease:cubic-bezier(.16,1,.3,1);
}
[data-theme="light"]{
  --bg:var(--white); --bg-alt:var(--white-2); --ink:#101214;
  --ink-2:#59616a; --ink-3:#6b737c; --ink-4:#98a0a8;
  --line:rgba(16,18,20,.14); --line-2:rgba(16,18,20,.07);
  --signal:var(--steel-dk); --wash:rgba(55,105,178,.05);
  background:var(--bg); color:var(--ink);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--black);color:#f3f4f2;font-family:var(--sans);font-size:var(--t-body);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{list-style:none;padding:0}
::selection{background:var(--steel);color:#05080b}
:focus-visible{outline:1.5px solid var(--steel);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:fixed;left:var(--gut);top:.6rem;z-index:99;background:var(--white);color:var(--black);font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;padding:.6rem .9rem;transform:translateY(-220%);transition:transform .2s ease}
.skip:focus{transform:none}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut);width:100%}
.sec{background:var(--bg);color:var(--ink);padding-block:var(--sec-y);position:relative}

/* ---------- type ---------- */
.display{font-weight:500;letter-spacing:-.03em;line-height:1.02;text-wrap:balance}
.label{font-family:var(--mono);font-size:var(--t-label);font-weight:500;letter-spacing:.19em;text-transform:uppercase;color:var(--ink-2)}
.label .i{color:var(--signal)}
.lead{font-size:var(--t-lead);line-height:1.4;letter-spacing:-.014em;text-wrap:pretty}
.muted{color:var(--ink-2)}
.sechead{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:1.3rem;margin-bottom:clamp(2.2rem,5vh,3.8rem)}
.sechead::after{content:"";height:1px;background:var(--line)}

/* ---------- the lockup: [Au] and the name are two objects ---------- */
.lock{display:inline-flex;align-items:center;gap:13px}
.lock__mk{font-family:var(--sans);font-weight:600;font-size:1.02rem;letter-spacing:-.01em;line-height:1;color:var(--ink);white-space:nowrap}
.lock__mk i{font-style:normal;color:var(--signal);font-weight:500}
.lock__nm{font-family:var(--sans);font-weight:500;font-size:.715rem;letter-spacing:.185em;text-transform:uppercase;color:var(--ink-2);line-height:1;white-space:nowrap;transition:color .3s ease}
.lock:hover .lock__nm{color:var(--ink)}
.art .lock__mk{color:#101214}
.art .lock__nm{color:#59616a}
.art .lock:hover .lock__nm{color:#101214}

/* ---------- header ---------- */
.hdr{position:fixed;inset:0 0 auto;z-index:60;background:color-mix(in srgb,var(--black) 86%,transparent);backdrop-filter:blur(16px) saturate(120%);border-bottom:1px solid transparent;transition:border-color .35s ease}
.hdr.is-stuck{border-bottom-color:var(--line)}
.hdr__in{max-width:var(--maxw);margin-inline:auto;padding:1.15rem var(--gut);display:flex;align-items:center;gap:2rem}
.nav{margin-left:auto;display:flex;align-items:center;gap:clamp(1.3rem,2.4vw,2.5rem)}
.nav a{font-family:var(--mono);font-size:var(--t-label);font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:#8d949c;position:relative;padding-block:.4rem;white-space:nowrap;transition:color .3s ease}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--steel);transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.nav a:hover{color:#f3f4f2}
.nav a:hover::after{transform:scaleX(1)}
.btn{display:inline-flex;align-items:center;gap:.7rem;font-family:var(--mono);font-size:var(--t-label);font-weight:500;letter-spacing:.14em;text-transform:uppercase;padding:.78rem 1.15rem;border:1px solid currentColor;background:var(--ink);color:var(--bg);transition:background .3s ease,color .3s ease}
.btn:hover{background:transparent;color:var(--ink)}
.btn .ar{transition:transform .4s var(--ease)}
.btn:hover .ar{transform:translateX(4px)}
.btn--lg{padding:1.05rem 1.5rem}
.nav a.btn{background:#f3f4f2;color:var(--black);border-color:#f3f4f2;margin-left:.4rem}
.nav a.btn::after{display:none}
.nav a.btn:hover{background:transparent;color:#f3f4f2}
.navtoggle{display:none;margin-left:auto;background:none;border:0;color:#f3f4f2;font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;text-transform:uppercase;padding:.5rem 0;cursor:pointer}

/* ---------- hero ---------- */
.hero{background:var(--black);padding-top:clamp(7.5rem,17vh,10.5rem);padding-bottom:0;position:relative}
.hero__grid{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);gap:clamp(2rem,5vw,5.5rem);align-items:center}
.hero__meta{display:flex;gap:1.5rem;flex-wrap:wrap;margin-bottom:clamp(1.8rem,4.5vh,2.8rem)}
.hero h1{font-size:var(--t-h1);font-weight:500;letter-spacing:-.032em;line-height:1.03;max-width:17ch}
.hero__sup{margin-top:clamp(1.5rem,3.4vh,2.2rem);font-size:var(--t-lead);line-height:1.4;letter-spacing:-.014em;color:var(--ink-2);max-width:44ch;text-wrap:pretty}
.hero__act{margin-top:clamp(2rem,4.6vh,3rem)}
.hero__vis{position:relative;aspect-ratio:1/1.06;width:100%;max-width:600px;justify-self:end}
.hero__vis canvas{width:100%;height:100%;touch-action:none;cursor:grab}
.rail{margin-top:clamp(3.4rem,8vh,6rem);border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr)}
.rail__i{display:flex;align-items:baseline;gap:.85rem;padding:1.3rem 1.5rem 1.3rem 0;border-right:1px solid var(--line-2)}
.rail__i:last-child{border-right:0}
.rail > .rail__i + .rail__i{padding-left:clamp(1.2rem,2.2vw,2.2rem)}
.rail__i .n{font-family:var(--mono);font-size:var(--t-label);color:var(--steel);letter-spacing:.14em}
.rail__i .t{font-family:var(--mono);font-size:var(--t-label);font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2)}

/* ---------- 01 the firm ---------- */
.firm__grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:clamp(2rem,6vw,6rem);align-items:start}
.firm__grid h2{font-size:clamp(1.4rem,2.6vw,2.45rem);font-weight:400;letter-spacing:-.024em;line-height:1.2;max-width:33ch;text-wrap:pretty}
.firm__grid--solo{grid-template-columns:minmax(0,1fr)}
.firm__grid--solo h2{max-width:44ch;font-size:clamp(1.5rem,2.9vw,2.7rem)}
.firm__side{border-left:1px solid var(--line);padding-left:clamp(1.4rem,2.4vw,2.4rem)}
.firm__side p{color:var(--ink-2);max-width:38ch;text-wrap:pretty}
.firm__side .label{display:block;margin-bottom:1rem}

/* ---------- 02 search: full-width composition ---------- */
.srch__top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(1.8rem,5vw,5rem);align-items:end;margin-bottom:clamp(2.4rem,5.5vh,3.8rem)}
.srch__top h2{font-size:var(--t-h2);max-width:16ch}
.srch__top p{color:var(--ink-2);max-width:50ch;text-wrap:pretty}
.dims{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.dims--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.dims--4 .dim__d{max-width:28ch}
.dim{padding:clamp(1.7rem,4vh,2.6rem) clamp(1.4rem,2.6vw,2.6rem) clamp(2rem,5vh,3.4rem) 0;border-right:1px solid var(--line-2);display:flex;flex-direction:column;gap:.9rem;position:relative;transition:background .45s ease}
.dim:last-child{border-right:0;padding-right:0}
.dims > .dim + .dim{padding-left:clamp(1.4rem,2.6vw,2.6rem)}
.dim:hover{background:var(--wash)}
.dim__n{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;color:var(--ink-3);transition:color .3s ease}
.dim:hover .dim__n{color:var(--signal)}
.dim__t{font-size:var(--t-h3);font-weight:500;letter-spacing:-.022em;line-height:1.06}
.dim__d{color:var(--ink-2);max-width:32ch;text-wrap:pretty}
.srch__close{display:flex;gap:.9rem;margin-top:clamp(1.8rem,4vh,2.6rem);font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);flex-wrap:wrap}
.srch__close span{border:1px solid var(--line);padding:.5rem .8rem}

/* ---------- 03 why ---------- */
.why{background:var(--black-2)}
.why__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.why__i{padding:clamp(1.8rem,4vh,2.8rem) clamp(1.4rem,2.6vw,2.6rem) clamp(2.4rem,6vh,3.8rem) 0;border-right:1px solid var(--line-2);display:flex;flex-direction:column;gap:1rem}
.why__i:last-child{border-right:0;padding-right:0}
.why__grid > .why__i + .why__i{padding-left:clamp(1.4rem,2.6vw,2.6rem)}
.why__i h3{font-size:clamp(1.12rem,1.5vw,1.4rem);font-weight:500;letter-spacing:-.018em;line-height:1.15}
.why__i p{color:var(--ink-2);max-width:32ch;text-wrap:pretty}
.why__i .n{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;color:var(--ink-3);transition:color .3s ease}
.why__i:hover .n{color:var(--signal)}
.why__op{margin-top:clamp(2.2rem,5vh,3.4rem);border-top:1px solid var(--line);padding-top:clamp(1.5rem,3.4vh,2.2rem);display:flex;justify-content:space-between;gap:1.5rem;align-items:baseline;flex-wrap:wrap}
.why__op p{font-size:clamp(1.1rem,1.8vw,1.65rem);font-weight:400;letter-spacing:-.022em}

/* ---------- 04 briefings ---------- */
.brf__top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.8fr);gap:clamp(1.8rem,5vw,5rem);align-items:end;margin-bottom:clamp(2.2rem,5vh,3.4rem)}
.brf__top h2{font-size:var(--t-h2);max-width:24ch}
.feat{display:grid;grid-template-columns:minmax(0,auto) minmax(0,1fr) minmax(0,.72fr);gap:clamp(1.4rem,4vw,4rem);align-items:start;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-block:clamp(2rem,4.5vh,3.2rem);transition:background .4s ease}
.feat:hover{background:var(--bg-alt)}
.feat__n{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;color:var(--signal);padding-top:.45rem}
.feat h3{font-size:clamp(1.75rem,3.2vw,3rem);font-weight:500;letter-spacing:-.028em;line-height:1.02;max-width:20ch}
.feat__side{display:flex;flex-direction:column;gap:1rem;padding-top:.3rem}
.feat p{color:var(--ink-2);max-width:46ch;text-wrap:pretty}
.feat__go{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;text-transform:uppercase;display:inline-flex;gap:.7rem;align-items:center;transition:color .3s ease}
.feat:hover .feat__go{color:var(--signal)}
.brf__two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
.brf__i{padding:clamp(1.7rem,4vh,2.5rem) clamp(1.4rem,2.6vw,2.6rem) clamp(1.7rem,4vh,2.5rem) 0;border-right:1px solid var(--line-2);border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:.9rem;transition:background .4s ease}
.brf__i:last-child{border-right:0;padding-right:0}
.brf__two > .brf__i + .brf__i{padding-left:clamp(1.4rem,2.6vw,2.6rem)}
.brf__i:hover{background:var(--bg-alt)}
.brf__i h3{font-size:clamp(1.15rem,1.55vw,1.45rem);font-weight:500;letter-spacing:-.02em;line-height:1.12;max-width:24ch}
.brf__i p{color:var(--ink-2);font-size:.98rem;max-width:40ch;text-wrap:pretty}
.brf__meta{display:flex;gap:.8rem;align-items:center}
.cat{font-family:var(--mono);font-size:.63rem;font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--signal);border:1px solid color-mix(in srgb,var(--signal) 45%,transparent);padding:.28rem .55rem}

/* upcoming briefing */
.brf__next{margin-top:clamp(1.8rem,4vh,2.6rem);display:flex;align-items:baseline;gap:clamp(1rem,3vw,2.6rem);flex-wrap:wrap;opacity:.62}
.brf__next h3{font-size:clamp(1.1rem,1.5vw,1.35rem);font-weight:500;letter-spacing:-.02em;line-height:1.14;max-width:34ch}

/* article: [Au] editorial device + diagrams */
.aud{display:inline-flex;align-items:center;gap:.55rem;font-family:var(--mono);font-size:var(--t-label);letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2)}
.aud b{font-family:var(--sans);font-weight:600;font-size:.92rem;letter-spacing:-.01em;color:var(--ink)}
.aud b i{font-style:normal;color:var(--signal);font-weight:500}
.fig{grid-column:2;margin:2.2rem 0 2.6rem;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-block:1.6rem}
.fig svg{width:100%;height:auto}
.fig figcaption{margin-top:1rem;font-family:var(--mono);font-size:var(--t-label);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);max-width:52ch;line-height:1.7}
.fig .fl{stroke:rgba(16,18,20,.22);stroke-width:1.4;fill:none}
.fig .fl-hi{stroke:var(--signal);stroke-width:1.8;fill:none}
.fig .ft{font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;fill:#59616a}
.fig .ft-hi{fill:var(--signal)}
.fig .fd{fill:rgba(16,18,20,.24)}
.fig .fd-hi{fill:var(--signal)}

/* ---------- refer page ---------- */
.rf-hero{background:var(--black);padding-top:clamp(7.5rem,17vh,10rem);padding-bottom:var(--sec-y)}
.rf-hero h1{font-size:var(--t-h1);font-weight:500;letter-spacing:-.032em;line-height:1.03;max-width:19ch}
.rf-hero__sup{margin-top:clamp(1.5rem,3.4vh,2.2rem);font-size:var(--t-lead);line-height:1.42;color:var(--ink-2);max-width:52ch;text-wrap:pretty}
.rf-hero__sup b{color:var(--ink);font-weight:500}
.rf-hero__act{margin-top:clamp(2rem,4.6vh,2.8rem);display:flex;align-items:center;gap:1.2rem;flex-wrap:wrap}
.rf-hero__act .note{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3)}
.rf-share{margin-top:clamp(3rem,7vh,5rem);border-top:1px solid var(--line);padding-top:clamp(1.6rem,4vh,2.4rem);display:flex;align-items:baseline;gap:1.4rem;flex-wrap:wrap}
.rf-share__n{font-size:clamp(3rem,8vw,6.5rem);font-weight:500;letter-spacing:-.04em;line-height:.9;color:var(--steel)}
.rf-share__t{font-size:var(--t-lead);color:var(--ink-2);max-width:30ch}
.rf-flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-top:1px solid var(--line);margin-top:clamp(2.4rem,5vh,3.4rem)}
.rf-flow__i{padding:1.4rem clamp(1rem,1.8vw,1.8rem) 1.6rem 0;border-right:1px solid var(--line-2);display:flex;flex-direction:column;gap:.55rem}
.rf-flow__i:last-child{border-right:0;padding-right:0}
.rf-flow > .rf-flow__i + .rf-flow__i{padding-left:clamp(1rem,1.8vw,1.8rem)}
.rf-flow__i .n{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;color:var(--steel)}
.rf-flow__i h3{font-size:.99rem;font-weight:500;letter-spacing:-.012em;line-height:1.2}
.rf-flow__i p{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);line-height:1.65}
.rf-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.rf-step{padding:clamp(1.7rem,4vh,2.6rem) clamp(1.4rem,2.6vw,2.6rem) clamp(2rem,5vh,3.2rem) 0;border-right:1px solid var(--line-2);display:flex;flex-direction:column;gap:.9rem}
.rf-step:last-child{border-right:0;padding-right:0}
.rf-steps > .rf-step + .rf-step{padding-left:clamp(1.4rem,2.6vw,2.6rem)}
.rf-step .n{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;color:var(--signal)}
.rf-step h3{font-size:var(--t-h3);font-weight:500;letter-spacing:-.022em;line-height:1.08}
.rf-step p{color:var(--ink-2);max-width:34ch;text-wrap:pretty}
.rf-two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2rem,6vw,5.5rem);align-items:start}
.rf-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.rf-list li{padding:1.1rem 0;border-bottom:1px solid var(--line-2);color:var(--ink-2);max-width:44ch}
.rf-list li b{color:var(--ink);font-weight:500;display:block;margin-bottom:.25rem}
.rf-lanes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line)}
.rf-lane{padding:1.4rem clamp(1.2rem,2.2vw,2.2rem) 1.6rem 0;border-right:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.rf-lane:nth-child(2n){border-right:0;padding-right:0}
.rf-lanes > .rf-lane:nth-child(2n){padding-left:clamp(1.2rem,2.2vw,2.2rem)}
.rf-lane h3{font-family:var(--mono);font-size:var(--t-label);font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--signal);margin-bottom:.6rem}
.rf-lane p{color:var(--ink-2);font-size:.98rem;max-width:34ch}
.rf-econ{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);margin-top:clamp(2rem,4.5vh,3rem)}
.rf-econ__i{padding:clamp(1.6rem,3.6vh,2.4rem) clamp(1.2rem,2.2vw,2.2rem) clamp(1.8rem,4vh,2.6rem) 0;border-right:1px solid var(--line-2);display:flex;flex-direction:column;gap:.5rem}
.rf-econ__i:last-child{border-right:0;padding-right:0}
.rf-econ > .rf-econ__i + .rf-econ__i{padding-left:clamp(1.2rem,2.2vw,2.2rem)}
.rf-econ__i .k{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}
.rf-econ__i .v{font-size:clamp(1.1rem,1.5vw,1.35rem);font-weight:500;letter-spacing:-.02em;color:var(--ink-2)}
.rf-econ__i .s{font-size:clamp(1.5rem,2.6vw,2.3rem);font-weight:500;letter-spacing:-.03em;line-height:1;color:var(--steel);margin-top:.35rem}
.rf-terms{margin-top:clamp(2rem,4.5vh,3rem);border-top:1px solid var(--line);padding-top:1.5rem;color:var(--ink-3);font-size:.95rem;line-height:1.65;max-width:78ch;text-wrap:pretty}
.rf-faq{border-top:1px solid var(--line);margin-top:clamp(2rem,4.5vh,3rem)}
.rf-faq details{border-bottom:1px solid var(--line-2)}
.rf-faq summary{list-style:none;cursor:pointer;padding:1.25rem 0;display:flex;justify-content:space-between;gap:1.5rem;align-items:baseline;font-size:clamp(1.02rem,1.3vw,1.18rem);font-weight:500;letter-spacing:-.016em;transition:color .3s ease}
.rf-faq summary::-webkit-details-marker{display:none}
.rf-faq summary:hover{color:var(--signal)}
.rf-faq summary::after{content:"+";font-family:var(--mono);font-size:1.1rem;color:var(--signal);flex:none;line-height:1}
.rf-faq details[open] summary::after{content:"\2013"}
.rf-faq p{padding:0 0 1.4rem;color:var(--ink-2);max-width:64ch;text-wrap:pretty}
.rf-close{background:var(--black-2);border-top:1px solid var(--line)}
.rf-close h2{font-size:var(--t-h2);max-width:22ch}
.rf-close .sub{margin-top:1.2rem;color:var(--ink-2);max-width:46ch}
.rf-close .btn{margin-top:clamp(1.8rem,4vh,2.6rem)}
@media(max-width:1080px){
  .rf-flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rf-flow__i{border-bottom:1px solid var(--line-2)}
  .rf-flow > .rf-flow__i:nth-child(odd){padding-left:0}
  .rf-flow > .rf-flow__i:nth-child(2n){padding-left:clamp(1.2rem,2.2vw,2.2rem)}
  .rf-flow__i:nth-child(2n){border-right:0;padding-right:0}
  .rf-two{grid-template-columns:1fr;gap:2.4rem}
}
@media(max-width:860px){
  .rf-steps,.rf-econ,.rf-lanes{grid-template-columns:1fr}
  .rf-step,.rf-econ__i,.rf-lane{border-right:0;padding-right:0}
  .rf-steps > .rf-step + .rf-step,.rf-econ > .rf-econ__i + .rf-econ__i,.rf-lanes > .rf-lane:nth-child(2n){padding-left:0}
  .rf-flow{grid-template-columns:1fr}
  .rf-flow__i,.rf-flow__i:nth-child(2n){border-right:0;padding-right:0}
  .rf-flow > .rf-flow__i + .rf-flow__i,.rf-flow > .rf-flow__i:nth-child(2n){padding-left:0}
}

/* ---------- 05 contact ---------- */
.ct__grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(2rem,6vw,6rem);align-items:end}
.ct__grid h2{font-size:var(--t-h2);max-width:16ch}
.ct__act{display:flex;flex-direction:column;gap:1.2rem;align-items:flex-start}
.ct__act .btn{align-self:stretch;justify-content:space-between}
.ct__rows{width:100%;border-top:1px solid var(--line)}
.ct__row{display:flex;justify-content:space-between;gap:1rem;padding:.9rem 0;border-bottom:1px solid var(--line-2);font-family:var(--mono);font-size:var(--t-label);letter-spacing:.13em;text-transform:uppercase;color:var(--ink-2)}
.ct__row a{transition:color .3s ease}
.ct__row a:hover{color:var(--signal)}

/* ---------- footer ---------- */
.ftr{background:var(--black);color:#f3f4f2;border-top:1px solid rgba(255,255,255,.12);padding-block:clamp(2.4rem,6vh,3.6rem)}
.ftr__in{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:clamp(1.4rem,4vw,4rem);align-items:center}
.ftr__nav{display:flex;gap:clamp(1.1rem,2.2vw,2.2rem);flex-wrap:wrap}
.ftr__nav a{font-family:var(--mono);font-size:var(--t-label);font-weight:500;letter-spacing:.13em;text-transform:uppercase;color:#8d949c;transition:color .3s ease}
.ftr__nav a:hover{color:#f3f4f2}
.ftr__meta{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.12em;text-transform:uppercase;color:#8d949c;text-align:right;display:flex;flex-direction:column;gap:.3rem}
.ftr .lock__mk{color:#f3f4f2}
.ftr .lock__nm{color:#8d949c}

/* ---------- article pages ---------- */
.art{background:var(--white);color:#101214;--signal:var(--steel-dk);--ink-2:#59616a;--ink-3:#6b737c;--ink-4:#98a0a8;--line:rgba(16,18,20,.14);--line-2:rgba(16,18,20,.07)}
.art__hdr{padding-top:clamp(7rem,16vh,10rem);padding-bottom:clamp(2.4rem,6vh,4rem);border-bottom:1px solid rgba(16,18,20,.14)}
.art__meta{display:flex;gap:1.1rem;align-items:center;flex-wrap:wrap;margin-bottom:clamp(1.6rem,4vh,2.4rem)}
.art__meta .m{font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;text-transform:uppercase;color:#59616a}
.art .cat{color:var(--steel-dk);border-color:rgba(55,105,178,.45)}
.art h1{font-size:clamp(2.1rem,4.4vw,4rem);font-weight:500;letter-spacing:-.032em;line-height:1.02;max-width:22ch}
.art__dek{margin-top:clamp(1.4rem,3.2vh,2rem);font-size:var(--t-lead);color:#59616a;max-width:56ch;text-wrap:pretty}
.art__body{padding-block:clamp(3rem,7vh,5rem);display:grid;grid-template-columns:minmax(0,7rem) minmax(0,68ch) minmax(0,1fr);gap:clamp(1.5rem,4vw,4rem)}
.art__body > .col{grid-column:2}
.art__body p{margin-bottom:1.35rem;font-size:1.11rem;line-height:1.64;color:#22282e;max-width:68ch;text-wrap:pretty}
.art__body h2{grid-column:2;font-size:clamp(1.3rem,2vw,1.7rem);font-weight:500;letter-spacing:-.022em;line-height:1.12;margin:2.2rem 0 1.1rem;max-width:68ch}
.art__idx{grid-column:1;font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);position:sticky;top:6rem;align-self:start}
.pull{grid-column:2;margin:2rem 0 2.4rem;padding-left:1.4rem;border-left:2px solid var(--steel-dk);font-size:clamp(1.22rem,1.9vw,1.55rem);line-height:1.26;letter-spacing:-.022em;color:#101214;max-width:44ch;text-wrap:pretty}
.art__end{grid-column:2;margin-top:1.4rem;font-family:var(--mono);font-size:var(--t-label);letter-spacing:.14em;text-transform:uppercase;color:#59616a;border-top:1px solid rgba(16,18,20,.14);padding-top:1.2rem;max-width:68ch}
.rel{border-top:1px solid rgba(16,18,20,.14);padding-block:clamp(2.4rem,6vh,4rem)}
.rel__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:1.8rem}
.rel__i{padding:1.6rem clamp(1.4rem,2.6vw,2.6rem) 1.6rem 0;border-right:1px solid rgba(16,18,20,.07);display:flex;flex-direction:column;gap:.8rem}
.rel__i:last-child{border-right:0;padding-right:0}
.rel__grid > .rel__i + .rel__i{padding-left:clamp(1.4rem,2.6vw,2.6rem)}
.rel__i h3{font-size:1.2rem;font-weight:500;letter-spacing:-.02em;line-height:1.14;max-width:26ch;transition:color .3s ease}
.rel__i:hover h3{color:var(--steel-dk)}
.art .hdr{background:color-mix(in srgb,var(--white) 88%,transparent)}
.art .hdr.is-stuck{border-bottom-color:rgba(16,18,20,.14)}
.art .hdr .nav a{color:#59616a}
.art .hdr .nav a:hover{color:#101214}
.art .hdr .nav a::after{background:var(--signal)}
.art .hdr .nav a.btn{background:#101214;color:var(--white);border-color:#101214}
.art .hdr .nav a.btn:hover{background:transparent;color:#101214}
.art .navtoggle{color:#101214}

/* ---------- reveals: restrained, only on major type ---------- */
[data-rv]{opacity:1;transform:none}
.rvline{display:block;overflow:hidden;padding-bottom:.16em;margin-bottom:-.16em}
.rvline > span{display:block}
html.js [data-rv]{opacity:0;transform:translateY(10px);transition:opacity .75s var(--ease),transform .75s var(--ease);transition-delay:var(--d,0ms)}
html.js [data-rv].in{opacity:1;transform:none}
html.js .rvline > span{transform:translateY(102%);transition:transform .95s var(--ease);transition-delay:var(--d,0ms)}
html.js .in .rvline > span,html.js [data-rv].in.rvline > span{transform:none}

/* ---------- responsive ---------- */
@media(max-width:1180px){
  .hero__grid{grid-template-columns:1fr;gap:clamp(2.4rem,6vh,3.4rem)}
  .hero__vis{max-width:460px;justify-self:start;aspect-ratio:1/.82}
  .hero h1{max-width:22ch}
}
@media(max-width:1080px){
  .dims--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .dims--4 > .dim:nth-child(odd){padding-left:0}
  .dims--4 > .dim:nth-child(2n){padding-left:clamp(1.4rem,2.6vw,2.6rem)}
  .dims--4 .dim:nth-child(2n){border-right:0;padding-right:0}
  .dims--4 .dim:nth-child(-n+2){border-bottom:1px solid var(--line-2)}
  .fig{grid-column:1}
  .firm__grid,.srch__top,.brf__top,.ct__grid{grid-template-columns:1fr}
  .firm__side{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:1.6rem}
  .feat{grid-template-columns:minmax(0,auto) minmax(0,1fr)}
  .feat__side{grid-column:2}
  .art__body{grid-template-columns:1fr}
  .art__body > .col,.art__body h2,.pull,.art__end{grid-column:1}
  .art__idx{display:none}
}
@media(max-width:860px){
  .dims,.dims--4,.why__grid{grid-template-columns:1fr;border-top:0}
  .dims--4 .dim:nth-child(2n),.dims--4 .dim:nth-child(-n+2){border-right:0;padding-right:0;border-bottom:0}
  .dim,.why__i{border-right:0;padding-right:0;border-top:1px solid var(--line)}
  .dims > .dim + .dim,.dims--4 > .dim:nth-child(2n),.why__grid > .why__i + .why__i{padding-left:0}
  .dim__d,.why__i p,.dims--4 .dim__d{max-width:46ch}
}
@media(max-width:900px){
  .nav{display:none}
  .nav.is-open{display:flex;position:fixed;inset:auto 0 0;top:3.8rem;flex-direction:column;align-items:flex-start;gap:0;background:var(--black);border-top:1px solid rgba(255,255,255,.12);padding:var(--gut);height:calc(100dvh - 3.8rem);z-index:70}
  .nav.is-open a{font-size:1.5rem;font-family:var(--sans);letter-spacing:-.024em;text-transform:none;color:#f3f4f2;padding-block:1rem;border-bottom:1px solid rgba(255,255,255,.06);width:100%;white-space:normal}
  .nav.is-open a.btn{background:none;border:0;color:var(--steel);padding:1.2rem 0}
  .navtoggle{display:block}
  .art .nav.is-open{background:var(--white);border-top-color:rgba(16,18,20,.14)}
  .art .nav.is-open a{color:#101214;border-bottom-color:rgba(16,18,20,.07)}
  .art .nav.is-open a.btn{color:var(--steel-dk)}
}
@media(max-width:720px){
  :root{--sec-y:clamp(3.6rem,8vh,5.5rem)}
  .hero{padding-top:6.4rem}
  .hero__vis{max-width:100%;aspect-ratio:1/.9}
  .lock__nm{font-size:.66rem;letter-spacing:.15em}
  .rail,.brf__two,.rel__grid{grid-template-columns:1fr}
  .rail__i{border-right:0;border-bottom:1px solid var(--line-2);padding:1.05rem 0}
  .rail > .rail__i + .rail__i,.brf__two > .brf__i + .brf__i,.rel__grid > .rel__i + .rel__i{padding-left:0}
  .rail__i:last-child{border-bottom:0}
  .brf__i,.rel__i{border-right:0;padding-right:0}
  .feat{grid-template-columns:1fr}
  .feat__n,.feat__side{grid-column:1}
  .ftr__in{grid-template-columns:1fr;gap:1.5rem;align-items:start}
  .ftr__meta{text-align:left}
  .ct__act{width:100%}
  .art__body p{font-size:1.05rem}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  html.js [data-rv]{opacity:1;transform:none}
  html.js .rvline > span{transform:none}
}