/* Optimal Virtual Staffing: "the answer desk". One family (Inter), one colour (violet), square corners, notched message shapes. */
:root{
  --ink:#15131A; --txt:#2B2833; --meta:#6B6778; --line:#E6E2EE; --line-2:#D6D0E2;
  --soft:#F7F5FB; --v:#5B21D6; --v-d:#4515B0; --v-2:#F1ECFE; --v-3:#D9CCFB;
  --bg:#FFFFFF; --w:1200px; --g:20px;
  --sh:0 1px 0 rgba(21,19,26,.04), 0 12px 32px -18px rgba(45,20,110,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
body{margin:0;background:var(--bg);color:var(--txt);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.6;font-feature-settings:"cv11";text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:var(--v);text-decoration:none}
a:hover{color:var(--v-d)}
:focus-visible{outline:2px solid var(--v);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--v);color:#fff;padding:8px 14px;z-index:99}
.skip:focus{left:8px;top:8px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--g)}
.ico{flex:none;display:inline-block;vertical-align:middle}
.center{text-align:center}

/* ---------- shared bits ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;line-height:1;letter-spacing:.01em;color:var(--v);background:var(--v-2);border:1px solid var(--v-3);padding:5px 8px 5px 7px;white-space:nowrap}
.hash{font-weight:600;color:var(--v)}
.lbl{margin:0 0 12px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--meta)}
.lbl--gap{margin-top:44px}
.textlink{display:inline-flex;align-items:center;gap:6px;font-weight:600}
.textlink .ico{transition:transform .15s}
.textlink:hover .ico{transform:translateX(3px)}
.kicker{display:inline-flex;align-items:center;gap:8px;margin:0 0 18px;font-size:13px;font-weight:600;color:var(--meta)}
.dot{width:8px;height:8px;background:var(--v)}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--meta);margin:0 0 18px}
.crumbs a{color:var(--meta)}
.crumbs a:hover{color:var(--v)}
.crumbs span[aria-hidden]{color:var(--line-2)}

/* ---------- header ---------- */
.bar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.bar__in{display:flex;align-items:center;gap:24px;height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.logo:hover{color:var(--ink)}
.logo__mark svg{width:28px;height:28px;display:block}
.logo__word b{font-weight:800}
.bar__nav{display:none;gap:22px;margin-left:auto}
.bar__nav a{color:var(--txt);font-size:14px;font-weight:500}
.bar__nav a:hover{color:var(--v)}
.bar__ask{margin-left:auto;display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 12px;border:1px solid var(--line-2);color:var(--ink);font-size:14px;font-weight:500}
.bar__ask span{display:none}
.bar__ask:hover{border-color:var(--v);color:var(--v)}
.chan{border-top:1px solid var(--line);background:#fff}
.chan__in{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.chan__in::-webkit-scrollbar{display:none}
.chan__a{position:relative;display:inline-flex;align-items:center;gap:2px;flex:none;height:44px;padding:0 9px;font-size:14px;font-weight:500;color:var(--txt);white-space:nowrap}
.chan__a:first-child{margin-left:-10px}
.chan__h{color:var(--meta);font-weight:400;margin-right:1px}
.chan__n{margin-left:6px;font-size:11px;font-weight:600;color:var(--meta);background:var(--soft);padding:2px 5px;line-height:1.2}
.chan__a:hover{color:var(--v)}
.chan__a.is-on{color:var(--v);font-weight:600}
.chan__a.is-on::after{content:"";position:absolute;left:10px;right:10px;bottom:-1px;height:3px;background:var(--v)}
.chan__a.is-on .chan__h{color:var(--v)}
.chan__a.is-on .chan__n{background:var(--v);color:#fff}

/* ---------- hero ---------- */
.hero{position:relative;padding:56px 0 0;background:
  linear-gradient(180deg,rgba(255,255,255,0) 0,#fff 88%),
  url(/assets/grid.svg) 0 0/24px 24px, #fff;border-bottom:1px solid var(--line)}
.hero__in{text-align:center;max-width:880px}
.hero__t{margin:0 auto;font-size:clamp(34px,7.4vw,64px);line-height:1.04;letter-spacing:-.035em;font-weight:800;color:var(--ink);max-width:14ch;text-wrap:balance}
.hero__sub{margin:18px auto 0;max-width:560px;font-size:18px;line-height:1.55;color:var(--meta);text-wrap:balance}
.ask{position:relative;display:flex;align-items:center;margin:32px auto 0;max-width:720px;height:64px;background:#fff;border:2px solid var(--ink);box-shadow:6px 6px 0 var(--v)}
.ask:focus-within{border-color:var(--v)}
.ask__ico{display:flex;padding:0 6px 0 18px;color:var(--meta)}
.ask input{flex:1;min-width:0;height:100%;border:0;background:transparent;font:inherit;font-size:17px;color:var(--ink);padding:0 8px;outline:0}
.ask input::placeholder{color:#8F8A9C}
.ask__btn{display:none;align-items:center;height:100%;padding:0 26px;background:var(--v);color:#fff;font-weight:600;font-size:15px}
.ask__btn:hover{background:var(--v-d);color:#fff}
.pop{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin:22px auto 0;font-size:13px;color:var(--meta)}
.pop span{margin-right:4px}
.pop a{padding:5px 10px;border:1px solid var(--line-2);background:#fff;color:var(--txt);font-weight:500}
.pop a:hover{border-color:var(--v);color:var(--v)}

/* floating question fragments around the hero (wide screens only) */
.floaty{display:none;position:absolute;inset:0;pointer-events:none;max-width:1320px;margin:0 auto}
.floaty a{pointer-events:auto;position:absolute;display:block;padding:10px 14px 11px;background:#fff;border:1px solid var(--line-2);box-shadow:var(--sh);font-size:14px;font-weight:600;color:var(--ink);max-width:220px;line-height:1.35}
.floaty a::after{content:"";position:absolute;bottom:-9px;width:12px;height:9px;background:var(--line-2);clip-path:polygon(0 0,100% 0,0 100%)}
.floaty a small{display:block;font-size:11px;font-weight:600;color:var(--v);margin-bottom:2px}
.floaty a:hover{border-color:var(--v);color:var(--v)}
.floaty a:nth-child(odd)::after{left:14px}
.floaty a:nth-child(even)::after{right:14px;clip-path:polygon(0 0,100% 0,100% 100%)}
.floaty .f1{left:20px;top:120px;transform:rotate(-2deg)}
.floaty .f2{right:20px;top:96px;transform:rotate(1.5deg)}
.floaty .f3{left:64px;top:300px;transform:rotate(1deg)}
.floaty .f4{right:56px;top:290px;transform:rotate(-1.5deg)}
/* the "desk" window: live-looking answered feed */
.desk{position:relative;max-width:980px;margin:48px auto -1px;background:#fff;border:1px solid var(--line-2);border-bottom:0;box-shadow:var(--sh)}
.desk__bar{display:flex;flex-wrap:wrap;gap:6px 16px;justify-content:space-between;align-items:center;padding:12px 18px;border-bottom:1px solid var(--line);background:var(--soft);font-size:13px}
.desk__ch{display:inline-flex;align-items:center;gap:4px;font-weight:700;color:var(--ink)}
.desk__ch .ico{color:var(--meta)}
.desk__live{display:inline-flex;align-items:center;gap:8px;color:var(--meta)}
.pulse{width:8px;height:8px;background:#1FA463;box-shadow:0 0 0 3px rgba(31,164,99,.18)}
.desk__body{padding:8px 18px}
.desk__body .convo{padding:22px 0;border:0;border-bottom:1px dashed var(--line-2);background:none;box-shadow:none}
.desk__body .convo:last-child{border-bottom:0}
.typing{display:flex;align-items:center;gap:12px;padding:18px 0 20px;font-size:13px;color:var(--meta)}
.typing__dots{display:inline-flex;gap:4px;padding:10px 12px;background:var(--v-2);border:1px solid var(--v-3)}
.typing__dots i{width:6px;height:6px;background:var(--v);opacity:.35;animation:blink 1.2s infinite}
.typing__dots i:nth-child(2){animation-delay:.2s}.typing__dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{40%{opacity:1}}
.desk__foot{display:flex;justify-content:center;align-items:center;gap:8px;padding:14px;border-top:1px solid var(--line);font-size:14px;font-weight:600}

/* ---------- conversation unit (question bubble + answer reply) ---------- */
.convo{display:grid;gap:14px}
.convo__q{position:relative;justify-self:end;display:block;max-width:560px;padding:14px 18px 15px;background:var(--soft);border:1px solid var(--line);color:var(--ink);text-align:left}
.convo__q::after{content:"";position:absolute;right:-1px;bottom:-11px;width:14px;height:11px;background:var(--line);clip-path:polygon(0 0,100% 0,100% 100%)}
.convo__q::before{content:"";position:absolute;right:0;bottom:-9px;width:12px;height:10px;background:var(--soft);clip-path:polygon(0 0,100% 0,100% 100%);z-index:1}
.convo__q:hover{border-color:var(--v-3);color:var(--ink)}
.convo__q:hover .convo__qt{color:var(--v)}
.convo__who{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 4px;font-size:12px;color:var(--meta)}
.convo__qt{display:block;font-size:17px;line-height:1.35;font-weight:700;letter-spacing:-.01em}
.convo__a{display:grid;grid-template-columns:1fr;gap:12px;max-width:760px}
.convo__mark{display:none}
.badge,.qrow__meta,.node__meta,.convo__time,.chan__n,.desk__live,.all__bar{font-variant-numeric:tabular-nums}
.convo__mark svg{width:32px;height:32px;display:block}
.convo__ab{border-left:3px solid var(--v);padding:2px 0 2px 16px}
.convo__time{font-size:12px;color:var(--meta)}
.convo__at{margin:8px 0 8px;font-size:15px;line-height:1.6;color:var(--txt)}
.convo__more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600}
.convos{display:grid;gap:0}
.convos .convo{padding:26px 0;border-top:1px solid var(--line)}

/* ---------- sections ---------- */
.sec{padding:72px 0}
.sec--tight{padding:48px 0 72px}
.sec--tint{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec--end{border-bottom:0}
.sec__head{max-width:640px;margin-bottom:32px}
.sec__t{margin:0;font-size:clamp(24px,3.4vw,32px);line-height:1.15;letter-spacing:-.025em;font-weight:800;color:var(--ink);text-wrap:balance}
.sec__d{margin:10px 0 0;color:var(--meta);font-size:16px}

/* channels grid */
.chgrid{list-style:none;margin:0;padding:0;display:grid;gap:16px;grid-template-columns:1fr}
.chcard__a{display:grid;grid-template-columns:112px 1fr;height:100%;background:#fff;border:1px solid var(--line);color:var(--txt);transition:border-color .15s,box-shadow .15s,transform .15s}
.chcard__a:hover{border-color:var(--v);box-shadow:var(--sh);color:var(--txt)}
.chcard__img{position:relative;display:block;background:var(--v-2) url(/assets/grid.svg) 0 0/16px 16px;overflow:hidden;border-right:1px solid var(--line)}
.chcard__fb{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--v)}
.chcard__img img{position:relative;width:100%;height:100%;object-fit:cover}
.chcard__b{display:flex;flex-direction:column;gap:4px;padding:16px}
.chcard__h{font-size:13px;font-weight:600;color:var(--v)}
.chcard__n{font-size:17px;font-weight:700;color:var(--ink);line-height:1.3;letter-spacing:-.01em}
.chcard__d{display:none;font-size:14px;line-height:1.55;color:var(--meta)}
.chcard__c{margin-top:auto;padding-top:8px}

/* all questions */
.all{display:grid;gap:32px}
.steps{list-style:none;margin:24px 0;padding:0;display:grid;gap:0;border-top:1px solid var(--line-2)}
.steps li{display:grid;grid-template-columns:40px 1fr;gap:8px;padding:14px 0;border-bottom:1px solid var(--line-2);font-size:14px;color:var(--meta);line-height:1.5}
.steps b{display:block;color:var(--ink);font-size:15px}
.steps__n{font-weight:800;color:var(--v);font-size:14px;padding-top:1px}
.steps--s li{grid-template-columns:32px 1fr;padding:12px 0}
.all__list{background:#fff;border:1px solid var(--line)}
.all__bar{display:flex;justify-content:space-between;padding:12px 18px;border-bottom:1px solid var(--line);font-size:13px;color:var(--meta)}
.all__bar b{color:var(--ink)}
.qlist{list-style:none;margin:0;padding:0}
.qrow[hidden]{display:none}
.qrow+.qrow{border-top:1px solid var(--line)}
.qrow__link{display:grid;grid-template-columns:1fr;gap:8px;padding:16px 18px;color:var(--txt)}
.qrow__link:hover{background:var(--v-2);color:var(--txt)}
.qrow__link:hover .qrow__t{color:var(--v)}
.qrow__n{display:none;font-size:12px;font-weight:600;color:var(--meta);padding-top:3px}
.qrow__main{display:block}
.qrow__t{display:block;font-size:16px;font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:-.01em}
.qrow__meta{display:flex;flex-wrap:wrap;gap:4px 14px;margin-top:6px;font-size:13px;color:var(--meta)}
.qrow__link .badge{justify-self:start}
.qempty{padding:24px 18px;margin:0;color:var(--meta)}
.qlist--card{border:1px solid var(--line);background:#fff}

/* ---------- category page ---------- */
.chead{border-bottom:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.6),#fff),url(/assets/grid.svg) 0 0/24px 24px}
.chead__in{display:grid;gap:28px;padding-top:32px;padding-bottom:40px}
.chead__hash{display:inline-flex;align-items:center;gap:8px;margin:0 0 10px;font-size:15px;font-weight:700;color:var(--v)}
.chead__t{margin:0;font-size:clamp(32px,6vw,52px);line-height:1.05;letter-spacing:-.035em;font-weight:800;color:var(--ink);text-wrap:balance}
.chead__d{margin:16px 0 0;max-width:560px;font-size:18px;line-height:1.55;color:var(--meta)}
.chead__meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:22px 0 0;font-size:13px;color:var(--meta)}
.chead__img{position:relative;aspect-ratio:5/2;background:var(--v-2) url(/assets/grid.svg) 0 0/16px 16px;border:1px solid var(--line-2);box-shadow:8px 8px 0 var(--v-3);overflow:hidden}
.chead__fb{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--v)}
.chead__img img{position:relative;width:100%;height:100%;object-fit:cover}
.cbody{display:grid;gap:40px}
.cbody__main>.convo{padding:24px;border:1px solid var(--v-3);background:#fff;box-shadow:var(--sh)}
.sidebox{border:1px solid var(--line);padding:18px;background:#fff}
.sidebox+.sidebox{margin-top:16px}
.sidebox--v{background:var(--soft)}
.sidech{list-style:none;margin:0;padding:0}
.sidech a{display:flex;align-items:center;gap:10px;padding:9px 0;border-top:1px solid var(--line);font-size:14px;color:var(--txt)}
.sidech li:first-child a{border-top:0}
.sidech .ico{color:var(--meta)}
.sidech span{flex:1}
.sidech em{font-style:normal;font-size:12px;color:var(--meta)}
.sidech a:hover{color:var(--v)}
.sidech a:hover .ico{color:var(--v)}

/* ---------- article: the thread ---------- */
.art{display:grid;gap:0;padding-top:28px;padding-bottom:64px}
.tmap{display:none}
.thread{min-width:0;max-width:740px}
.node{position:relative;padding-left:0}
.node__pin{display:none}
.node--q{margin-bottom:20px}
.node__who{margin:0 0 10px;font-size:13px;color:var(--meta)}
.node__t{margin:0;font-size:clamp(28px,5.6vw,44px);line-height:1.1;letter-spacing:-.03em;font-weight:800;color:var(--ink);text-wrap:balance}
.node__meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin:18px 0 0;font-size:13px;color:var(--meta)}
.node__meta span{display:inline-flex;align-items:center;gap:5px}
.node__meta .badge{gap:5px}
.tldr{position:relative;background:var(--v-2);border:1px solid var(--v-3);border-left:4px solid var(--v);padding:18px 20px 20px}
.tldr__h{display:flex;justify-content:space-between;align-items:center;margin:0 0 10px}
.tldr__h .badge{background:#fff}
.tldr__h>span:last-child{font-size:11px;font-weight:700;letter-spacing:.08em;color:var(--v)}
.tldr__t{margin:0;font-size:18px;line-height:1.6;color:var(--ink);font-weight:500}
.node--a{margin-bottom:40px}
.node--body{margin-bottom:48px}
.node__h{margin:0 0 16px;font-size:24px;line-height:1.2;letter-spacing:-.02em;font-weight:800;color:var(--ink)}
.node--faq,.node--rel{margin-bottom:44px}

/* prose */
.prose{font-size:17px;line-height:1.72;color:var(--txt)}
.prose>*:first-child{margin-top:0}
.prose p{margin:0 0 1.1em}
.prose>p:first-child{font-size:19px;line-height:1.6;color:var(--ink)}
.prose h2{position:relative;margin:2.2em 0 .6em;padding-top:22px;border-top:1px solid var(--line);font-size:24px;line-height:1.25;letter-spacing:-.02em;font-weight:800;color:var(--ink)}
.prose h2::before{content:"";position:absolute;left:0;top:-1px;width:40px;height:3px;background:var(--v)}
.prose h3{margin:1.8em 0 .5em;font-size:19px;line-height:1.35;letter-spacing:-.01em;font-weight:700;color:var(--ink)}
.prose h3::before{content:"\21B3";color:var(--v);margin-right:8px;font-weight:600}
.prose a{text-decoration:underline;text-decoration-color:var(--v-3);text-underline-offset:3px;text-decoration-thickness:2px;font-weight:500}
.prose a:hover{text-decoration-color:var(--v)}
.prose strong{color:var(--ink);font-weight:700}
.prose ul,.prose ol{margin:0 0 1.3em;padding:0;list-style:none}
.prose li{position:relative;padding-left:28px;margin:0 0 .55em}
.prose ul>li::before{content:"";position:absolute;left:6px;top:.68em;width:7px;height:7px;background:var(--v)}
.prose ol{counter-reset:li}
.prose ol>li{counter-increment:li}
.prose ol>li::before{content:counter(li);position:absolute;left:0;top:.15em;width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff;background:var(--v);line-height:1}
.prose blockquote{position:relative;margin:1.6em 0;padding:16px 20px 16px 22px;background:var(--soft);border-left:3px solid var(--v);color:var(--ink)}
.prose blockquote p:last-child{margin-bottom:0}
.prose table{width:100%;margin:1.6em 0;border-collapse:collapse;font-size:15px;line-height:1.5;display:block;overflow-x:auto;font-variant-numeric:tabular-nums}
.prose thead th{background:var(--ink);color:#fff;font-weight:600;text-align:left;padding:10px 14px;font-size:13px;letter-spacing:.01em;white-space:nowrap}
.prose td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top;min-width:120px}
.prose tbody tr:nth-child(even) td{background:var(--soft)}
.prose tbody tr:hover td{background:var(--v-2)}
.prose td:first-child{font-weight:600;color:var(--ink)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.prose code{font-size:.9em;background:var(--soft);padding:1px 5px}

/* follow-ups */
.fus{border:1px solid var(--line);background:#fff}
.fu+.fu{border-top:1px solid var(--line)}
.fu summary{display:grid;grid-template-columns:24px 1fr 16px;gap:10px;align-items:start;padding:16px 18px;cursor:pointer;list-style:none;font-weight:700;color:var(--ink);line-height:1.4}
.fu summary::-webkit-details-marker{display:none}
.fu summary:hover{color:var(--v)}
.fu__r{color:var(--v);padding-top:1px;display:inline-flex}
.fu__tog{position:relative;width:14px;height:14px;margin-top:4px}
.fu__tog::before,.fu__tog::after{content:"";position:absolute;left:0;top:6px;width:14px;height:2px;background:var(--meta)}
.fu__tog::after{transform:rotate(90deg);transition:transform .15s}
.fu[open] .fu__tog::after{transform:rotate(0)}
.fu__a{padding:0 18px 18px 18px}
@media (min-width:640px){.fu__a{padding-left:52px}}
.fu__a p{margin:0;padding-left:14px;border-left:3px solid var(--v);color:var(--txt);font-size:15px;line-height:1.65}

/* channel row */
.chrow{list-style:none;margin:28px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.chrow a{display:flex;gap:10px;align-items:flex-start;height:100%;padding:14px;background:#fff;border:1px solid var(--line);color:var(--txt)}
.chrow a .ico{color:var(--v);margin-top:2px}
.chrow a span{display:flex;flex-direction:column;min-width:0}
.chrow b{font-size:14px;font-weight:600;color:var(--ink);overflow-wrap:anywhere}
.chrow em{font-style:normal;font-size:12px;color:var(--meta)}
.chrow a:hover,.chrow a.is-on{border-color:var(--v)}
.chrow a.is-on{background:var(--v-2)}

/* about */
.about{display:grid;gap:40px;padding-top:28px;padding-bottom:72px}
.about__main{max-width:740px}

/* 404 */
.hero--404{padding-bottom:56px}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);background:#fff;padding:48px 0 0;font-size:14px}
.foot__in{display:grid;gap:32px}
.foot__brand p{margin:14px 0 0;max-width:420px;color:var(--meta)}
.foot__small{font-size:12px}
.foot__h{margin:0 0 10px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--meta)}
.foot ul{list-style:none;margin:0;padding:0;columns:2;column-gap:16px}
.foot li{margin:0 0 6px;break-inside:avoid}
.foot__col a{color:var(--txt)}
.foot__col a:hover{color:var(--v)}
.foot__base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;margin-top:40px;padding-top:18px;padding-bottom:22px;border-top:1px solid var(--line);font-size:12px;color:var(--meta)}

/* ---------- ≥ 640 ---------- */
@media (min-width:640px){
  :root{--g:28px}
  .bar__ask span{display:inline}
  .ask__btn{display:inline-flex}
  .chgrid{grid-template-columns:1fr 1fr}
  .chcard__a{grid-template-columns:1fr;grid-template-rows:auto 1fr}
  .chcard__img{aspect-ratio:3/2;border-right:0;border-bottom:1px solid var(--line)}
  .chcard__d{display:block}
  .qrow__link{grid-template-columns:1fr auto;align-items:start;gap:16px}
  .convo__a{grid-template-columns:32px 1fr}
  .convo__mark{display:block}
  .chrow{grid-template-columns:repeat(4,1fr)}
  .foot ul{columns:1}
}
/* ---------- ≥ 960 ---------- */
@media (min-width:960px){
  .bar__nav{display:flex}
  .chan__n{display:none}
  .chan__in{justify-content:space-between}
  .chan__a:last-child{margin-right:-9px}
  .chan__a.is-on .chan__n{display:inline}
  .bar__ask{margin-left:8px}
  .hero{padding-top:80px}
  .chgrid{grid-template-columns:repeat(4,1fr);gap:20px}
  .all{grid-template-columns:340px 1fr;gap:56px;align-items:start}
  .all__side{position:sticky;top:130px}
  .qrow__link{grid-template-columns:44px 1fr auto}
  .qrow__n{display:block}
  .qlist--card .qrow__link{grid-template-columns:1fr auto}
  .chead__img{aspect-ratio:3/2}
  .chead__in{grid-template-columns:1.2fr 1fr;align-items:center;gap:56px;padding-top:40px;padding-bottom:56px}
  .cbody{grid-template-columns:1fr 300px;gap:56px;align-items:start}
  .cbody__side{position:sticky;top:130px}
  .about{grid-template-columns:1fr 300px;gap:56px;align-items:start}
  .foot__in{grid-template-columns:1.4fr 1fr 1fr}

  /* thread with a left rail + connecting line */
  .art{grid-template-columns:220px minmax(0,740px);gap:56px;justify-content:center;padding-top:36px}
  .tmap{display:block}
  .tmap__in{position:sticky;top:130px}
  .tmap__list{list-style:none;margin:0 0 20px;padding:0;position:relative}
  .tmap__list::before{content:"";position:absolute;left:4px;top:14px;bottom:14px;width:1px;background:var(--line-2)}
  .tmap__list a{position:relative;display:flex;align-items:center;gap:12px;padding:7px 0;font-size:14px;color:var(--txt)}
  .tmap__list a:hover{color:var(--v)}
  .tmap__list em{margin-left:auto;font-style:normal;font-size:12px;color:var(--meta)}
  .tmap__dot{position:relative;flex:none;width:9px;height:9px;background:#fff;border:2px solid var(--line-2)}
  .tmap__dot.is-v{background:var(--v);border-color:var(--v)}
  .tmap__back{display:inline-flex;align-items:center;gap:8px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;font-weight:600;width:100%}
  .thread{position:relative;padding-left:56px}
  .thread::before{content:"";position:absolute;left:15px;top:84px;bottom:40px;width:2px;background:linear-gradient(var(--line-2),var(--line-2)) 0 0/2px 100% no-repeat}
  .node__pin{position:absolute;left:-56px;top:2px;display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:#fff;border:2px solid var(--ink);font-weight:800;font-size:17px;color:var(--ink);z-index:1}
  .node__pin--mark{border:0;background:none}
  .node__pin--mark svg{width:32px;height:32px}
  .node__pin--s{left:-47px;top:6px;width:14px;height:14px;border:2px solid var(--v);background:#fff}
  .node--q .node__pin{top:30px}
  .thread>.crumbs{margin-left:0}
  .about__main .node{padding-left:56px}
  .about__main .node__pin{left:0}
  .about__main .node__pin--s{left:9px}
}
@media (min-width:1200px){
  .floaty{display:block}
  .art{grid-template-columns:240px minmax(0,760px);gap:72px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}