:root{
  --bg:#FFFFFF;
  --bg-alt:#F6F8FB;
  --bg-deep:#EFF3F8;
  --ink:#070B12;
  --ink-soft:#4C5563;
  --ink-mute:#8B93A1;
  --line:#E4E9F0;
  --line-strong:#D4DBE5;
  --cyan:#00C2D6;
  --cyan-b:#00E5FF;
  --blue:#0B6FE0;
  --blue-b:#168BFF;
  --violet:#6C3CE9;
  --violet-b:#9B7BFF;
  --grad: linear-gradient(115deg,var(--cyan-b) 0%,var(--blue-b) 48%,var(--violet-b) 100%);
  --grad-soft: linear-gradient(115deg,rgba(0,229,255,.12) 0%,rgba(22,139,255,.12) 48%,rgba(155,123,255,.12) 100%);
  --radius:16px;
  --maxw:1180px;
  --shadow: 0 20px 50px -20px rgba(11,20,35,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}
body{
  font-family:'Inter',system-ui,sans-serif;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  -webkit-tap-highlight-color:transparent;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.mono{font-family:'JetBrains Mono',monospace}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
section{position:relative}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-visible{opacity:1;transform:translateY(0)}

/* ---------- nav ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s ease,box-shadow .3s ease;
}
header.scrolled{border-color:var(--line);box-shadow:0 8px 30px -20px rgba(11,20,35,.25)}
nav{display:flex;align-items:center;justify-content:space-between;height:76px;max-width:var(--maxw);margin:0 auto;padding:0 28px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;letter-spacing:-.01em}
.brand .mark{width:30px;height:30px}
.brand .sub{display:block;font-family:'JetBrains Mono',monospace;font-weight:500;font-size:.56rem;letter-spacing:.14em;color:var(--ink-mute);margin-top:1px}
.navlinks{display:flex;align-items:center;gap:34px}
.navlinks a{font-size:.94rem;font-weight:500;color:var(--ink-soft);position:relative;padding:4px 0;transition:color .25s ease}
.navlinks a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--grad);transition:width .25s ease}
.navlinks a:hover{color:var(--ink)}
.navlinks a.active{color:var(--ink)}
.navlinks a.active::after{width:100%}
.navcta{display:flex;align-items:center;gap:14px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;z-index:200}
.burger span{width:22px;height:2px;background:var(--ink);transition:transform .3s ease,opacity .3s ease}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobilepanel{
  position:fixed;inset:0;background:#fff;z-index:150;
  display:flex;flex-direction:column;justify-content:center;gap:26px;padding:28px 40px;
  transform:translateY(-100%);transition:transform .45s cubic-bezier(.65,0,.35,1);
}
.mobilepanel.open{transform:translateY(0)}
.mobilepanel a{font-size:1.6rem;font-weight:700;color:var(--ink)}
.mobilepanel .m-cta{margin-top:12px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:11px;font-weight:600;font-size:.94rem;
  cursor:pointer;border:1.5px solid transparent;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,background .25s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 28px -12px rgba(11,111,224,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(11,111,224,.65)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-sm{padding:10px 18px;font-size:.86rem}

/* ---------- hero ---------- */
.hero{padding:180px 0 120px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center;max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:2}
.eyebrow-tag{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;
  border:1px solid var(--line-strong);background:#fff;font-size:.8rem;color:var(--ink-soft);margin-bottom:26px;
}
.eyebrow-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--grad)}
h1{font-size:clamp(2.6rem,5.1vw,4.4rem);line-height:1.06;font-weight:800;letter-spacing:-.025em;max-width:15ch}
.hero p.lead{margin-top:24px;font-size:1.15rem;line-height:1.65;color:var(--ink-soft);max-width:46ch}
.hero-actions{display:flex;gap:16px;margin-top:38px;flex-wrap:wrap}
.hero-canvas-wrap{position:relative;aspect-ratio:1/1;border-radius:24px;overflow:hidden;background:linear-gradient(160deg,#fbfdff,#eef3fa);border:1px solid var(--line)}
canvas#constellation{width:100%;height:100%;display:block}
.orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.55;pointer-events:none;z-index:0}
.orb1{width:420px;height:420px;background:radial-gradient(circle,var(--cyan-b),transparent 70%);top:-140px;left:-140px;animation:float1 16s ease-in-out infinite}
.orb2{width:380px;height:380px;background:radial-gradient(circle,var(--violet-b),transparent 70%);bottom:-160px;right:-100px;animation:float2 19s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(40px,50px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(-30px,-40px)}}

/* ---------- company strip ---------- */
.co-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-alt)}
.co-strip .wrap{display:flex;flex-wrap:wrap;gap:34px;align-items:center;justify-content:space-between;padding-top:26px;padding-bottom:26px}
.co-strip .co-item{display:flex;flex-direction:column;gap:2px}
.co-strip .co-item .label{font-size:.7rem;letter-spacing:.06em;color:var(--ink-mute)}
.co-strip .co-item .val{font-family:'JetBrains Mono',monospace;font-size:.88rem;font-weight:500;color:var(--ink)}

/* ---------- section heads ---------- */
.section-pad{padding:120px 0}
.section-pad.tight{padding:100px 0}
.s-head{max-width:640px;margin-bottom:56px}
.s-head .kicker{font-family:'JetBrains Mono',monospace;font-size:.8rem;color:var(--blue);margin-bottom:14px}
h2{font-size:clamp(2rem,3.4vw,2.9rem);font-weight:800;letter-spacing:-.02em;line-height:1.12}
.s-head p{margin-top:18px;color:var(--ink-soft);font-size:1.06rem;line-height:1.65}

/* ---------- philosophy ---------- */
.philosophy{background:var(--bg-alt)}
.phil-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.phil-grid h2{max-width:11ch}
.phil-grid p{color:var(--ink-soft);font-size:1.05rem;line-height:1.75;margin-top:20px}
.phil-visual{position:relative;height:340px;border-radius:20px;background:#fff;border:1px solid var(--line);overflow:hidden}

/* ---------- kovalent showcase ---------- */
.kovalent-band{position:relative}
.kv-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;margin-bottom:50px}
.kv-problem{
  border-radius:20px;border:1px solid var(--line);background:var(--bg-alt);
  padding:34px;margin-bottom:56px;display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;
}
.kv-problem h3{font-size:1.3rem;font-weight:700;margin-bottom:14px}
.kv-problem p{color:var(--ink-soft);line-height:1.65}
.scatter-chips{display:flex;flex-wrap:wrap;gap:10px}
.scatter-chips span{
  font-family:'JetBrains Mono',monospace;font-size:.78rem;padding:8px 13px;border-radius:8px;
  background:#fff;border:1px solid var(--line-strong);color:var(--ink-mute);
}
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:170px;gap:18px}
.bento .card{
  border-radius:var(--radius);border:1px solid var(--line);background:#fff;padding:26px;
  position:relative;overflow:hidden;transform-style:preserve-3d;transition:box-shadow .3s ease,border-color .3s ease;
  display:flex;flex-direction:column;justify-content:space-between;
}
.bento .card:hover{box-shadow:var(--shadow);border-color:var(--line-strong)}
.bento .card .bar{position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);opacity:.9}
.bento .card h4{font-size:1.05rem;font-weight:700;letter-spacing:-.01em}
.bento .card p{font-size:.88rem;color:var(--ink-soft);margin-top:8px;line-height:1.5}
.bento .card .ico{width:34px;height:34px;border-radius:9px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center}
.bento .c1{grid-column:span 2;grid-row:span 2}
.bento .c2{grid-column:span 2}
.bento .c3{grid-column:span 1}
.bento .c4{grid-column:span 1}
.bento .c5{grid-column:span 2}
.bento .c6{grid-column:span 1}
.bento .c7{grid-column:span 1}
.bento .c8{grid-column:span 2}
.kv-cta{display:flex;justify-content:center;margin-top:52px}

/* ---------- technology ---------- */
.tech-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:20px;overflow:hidden}
.tech-grid .t-item{background:#fff;padding:32px 26px;transition:background .25s ease}
.tech-grid .t-item:hover{background:var(--bg-alt)}
.tech-grid .t-item .num{font-family:'JetBrains Mono',monospace;font-size:.75rem;color:var(--ink-mute)}
.tech-grid .t-item h4{margin-top:14px;font-size:1.05rem;font-weight:700}
.tech-grid .t-item p{margin-top:8px;font-size:.87rem;color:var(--ink-soft);line-height:1.55}

/* ---------- story timeline ---------- */
.story{background:var(--bg-alt)}
.timeline{position:relative;max-width:760px;margin:0 auto}
.timeline::before{
  content:"";position:absolute;left:98px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--line-strong),var(--line-strong));
}
.timeline::after{
  content:"";position:absolute;left:98px;top:6px;width:2px;height:0;
  background:var(--grad);transition:height 1.4s cubic-bezier(.4,0,.2,1);
}
.timeline.draw::after{height:calc(100% - 12px)}
.t-row{display:grid;grid-template-columns:80px 36px 1fr;gap:0;align-items:start;margin-bottom:44px;position:relative}
.t-row:last-child{margin-bottom:0}
.t-row .yr{font-family:'JetBrains Mono',monospace;font-size:.82rem;color:var(--ink-mute);padding-top:3px}
.t-row .node{width:14px;height:14px;border-radius:50%;background:#fff;border:2px solid var(--blue);margin:0 auto;position:relative;z-index:2;margin-top:2px}
.t-row .content{padding-left:26px}
.t-row .content h4{font-size:1.05rem;font-weight:700}
.t-row .content p{margin-top:6px;color:var(--ink-soft);font-size:.94rem;line-height:1.6}

/* ---------- about (inline within story section top) ---------- */
.about-lead{max-width:700px;margin-bottom:20px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:60px}
.co-card{border:1px solid var(--line);border-radius:20px;padding:34px;background:var(--bg-alt)}
.co-card dl{display:flex;flex-direction:column;gap:16px}
.co-card .row{display:flex;justify-content:space-between;gap:16px;border-bottom:1px dashed var(--line-strong);padding-bottom:14px}
.co-card .row:last-child{border-bottom:0;padding-bottom:0}
.co-card dt{color:var(--ink-mute);font-size:.85rem}
.co-card dd{font-family:'JetBrains Mono',monospace;font-size:.86rem;text-align:right;color:var(--ink)}
.form-card{border:1px solid var(--line);border-radius:20px;padding:34px}
.form-card label{display:block;font-size:.85rem;font-weight:600;margin-bottom:8px;margin-top:18px}
.form-card label:first-of-type{margin-top:0}
.form-card input,.form-card textarea{
  width:100%;padding:13px 15px;border-radius:10px;border:1.5px solid var(--line-strong);
  font-family:'Inter',sans-serif;font-size:.95rem;color:var(--ink);background:#fff;transition:border-color .25s ease;
}
.form-card input:focus,.form-card textarea:focus{outline:none;border-color:var(--blue)}
.form-card textarea{resize:vertical;min-height:110px}
.form-card .btn{margin-top:22px;width:100%}
.form-note{font-size:.8rem;color:var(--ink-mute);margin-top:12px}

/* ---------- blog teaser + listing card ---------- */
.post-card{
  display:block;border:1px solid var(--line);border-radius:20px;background:#fff;
  padding:34px;max-width:720px;transition:box-shadow .3s ease,border-color .3s ease,transform .3s ease;
  position:relative;overflow:hidden;
}
.post-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);opacity:.9}
.post-card:hover{box-shadow:var(--shadow);border-color:var(--line-strong);transform:translateY(-3px)}
.post-card-meta{display:flex;align-items:center;gap:10px;font-size:.82rem;color:var(--ink-mute);margin-bottom:14px}
.post-card-meta .dot-sep{width:4px;height:4px;border-radius:50%;background:var(--ink-mute)}
.post-card h3{font-size:1.35rem;font-weight:700;letter-spacing:-.01em;line-height:1.25}
.post-card p{margin-top:10px;color:var(--ink-soft);line-height:1.6;max-width:60ch}
.post-card-link{display:inline-flex;margin-top:18px;font-size:.92rem;font-weight:600;color:var(--blue)}

.blog-list{display:flex;flex-direction:column;gap:22px}
.blog-list .post-card{max-width:none}

/* ---------- article (single post) ---------- */
.article-hero{padding:150px 0 60px}
.article-hero .wrap{max-width:720px}
.article-meta{display:flex;align-items:center;gap:10px;font-size:.85rem;color:var(--ink-mute);margin-bottom:20px}
.article-meta .dot-sep{width:4px;height:4px;border-radius:50%;background:var(--ink-mute)}
.article-hero h1{max-width:none;font-size:clamp(2.1rem,4.4vw,3rem)}
.article-hero .dek{margin-top:20px;font-size:1.1rem;color:var(--ink-soft);line-height:1.6;max-width:60ch}
.article-body{max-width:680px;margin:0 auto;padding:0 28px 100px}
.article-body p{color:var(--ink-soft);font-size:1.06rem;line-height:1.8;margin-bottom:22px}
.article-body h2{font-size:1.5rem;margin:44px 0 16px;letter-spacing:-.015em}
.article-body h3{font-size:1.2rem;font-weight:700;margin:32px 0 12px}
.article-body blockquote{
  border-left:3px solid var(--blue);margin:28px 0;padding:4px 0 4px 22px;
  font-size:1.12rem;color:var(--ink);font-style:normal;line-height:1.6;
}
.article-body ul{margin:0 0 22px 22px;color:var(--ink-soft);line-height:1.8}
.article-body a{color:var(--blue);text-decoration:underline;text-decoration-color:var(--line-strong)}
.article-foot{max-width:680px;margin:0 auto;padding:32px 28px 100px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;border-top:1px solid var(--line)}
.article-author{display:flex;align-items:center;gap:12px}
.article-author .initial{
  width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;
}
.article-author .who{display:flex;flex-direction:column}
.article-author .who strong{font-size:.92rem}
.article-author .who span{font-size:.8rem;color:var(--ink-mute)}

@media (max-width:560px){
  .post-card{padding:24px}
  .article-hero{padding:118px 0 40px}
  .article-body h2{font-size:1.3rem}
}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);background:#fff}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px}
.foot-brand .brand{margin-bottom:14px}
.foot-brand p{color:var(--ink-soft);font-size:.92rem;line-height:1.6;max-width:32ch}
.foot-col h5{font-size:.78rem;letter-spacing:.04em;color:var(--ink-mute);margin-bottom:16px}
.foot-col a{display:block;font-size:.92rem;color:var(--ink-soft);margin-bottom:12px;transition:color .2s ease}
.foot-col a:hover{color:var(--blue)}
.foot-bottom{border-top:1px solid var(--line);padding:24px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.8rem;color:var(--ink-mute)}

/* ---------- responsive: tablet, <=980px ---------- */
@media (max-width:980px){
  .navlinks{display:none}
  .burger{display:flex}
  .wrap{padding:0 24px}
  .article-body{padding-left:24px;padding-right:24px}
  .article-foot{padding-left:24px;padding-right:24px}
  nav{padding:0 24px}
  .hero{padding:150px 0 90px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-canvas-wrap{order:-1;aspect-ratio:16/10}
  h1{max-width:20ch}
  .hero p.lead{max-width:none}
  .phil-grid{grid-template-columns:1fr;gap:36px}
  .phil-visual{height:240px}
  .kv-problem{grid-template-columns:1fr;padding:28px}
  .bento{grid-template-columns:repeat(2,1fr);grid-auto-rows:auto}
  .bento .card{min-height:150px}
  .bento .c1{grid-row:span 1}
  .bento .c1,.bento .c2,.bento .c5,.bento .c8{grid-column:span 2}
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .foot-top{grid-template-columns:1fr 1fr;padding:52px 0 32px}
  .section-pad{padding:96px 0}
  .section-pad.tight{padding:80px 0}
}

/* ---------- responsive: large phone, <=680px ---------- */
@media (max-width:680px){
  .navcta .btn-primary{display:none}
  .co-strip .wrap{gap:22px;justify-content:flex-start}
  .co-strip .co-item{flex:1 1 40%}
  .kv-head{margin-bottom:34px}
  .scatter-chips span{font-size:.74rem;padding:7px 11px}
  .co-card .row{flex-direction:column;align-items:flex-start;gap:4px}
  .co-card dd{text-align:left}
  .form-card{padding:26px}
}

/* ---------- responsive: phone, <=560px ---------- */
@media (max-width:560px){
  .wrap{padding:0 20px}
  .article-body{padding-left:20px;padding-right:20px}
  .article-foot{padding-left:20px;padding-right:20px}
  nav{padding:0 20px;height:68px}
  .hero{padding:128px 0 72px}
  .hero-canvas-wrap{aspect-ratio:4/3}
  .orb1{width:260px;height:260px}
  .orb2{width:240px;height:240px}
  h1{font-size:clamp(2.1rem,9vw,2.6rem);max-width:none}
  .hero p.lead{font-size:1.02rem}
  .hero-actions .btn{flex:1 1 auto}
  .section-pad{padding:76px 0}
  .section-pad.tight{padding:64px 0}
  .s-head{margin-bottom:40px}
  h2{font-size:clamp(1.7rem,7vw,2.1rem)}
  .co-strip .wrap{gap:18px}
  .co-strip .co-item{flex:1 1 100%}
  .kv-problem{padding:22px}
  .bento{grid-template-columns:1fr}
  .bento .card{grid-column:span 1!important;grid-row:span 1!important;min-height:auto;padding:22px}
  .tech-grid{grid-template-columns:1fr}
  .tech-grid .t-item{padding:26px 22px}
  .foot-bottom{padding:20px 0 36px;}
  .timeline::before,.timeline::after{left:8px}
  .t-row{grid-template-columns:16px 1fr;gap:0;margin-bottom:34px}
  .t-row .yr{grid-column:1/3;padding-top:0;margin-bottom:8px}
  .t-row .node{margin:0}
  .t-row .content{padding-left:22px}
  .co-card,.form-card{padding:22px;border-radius:16px}
  .foot-top{grid-template-columns:1fr;padding:48px 0 28px;gap:44px}
  .foot-col a{margin-bottom:14px}
  .foot-brand p{margin-top:4px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .mobilepanel a{font-size:1.4rem}
}

/* ---------- responsive: small phone, <=380px ---------- */
@media (max-width:380px){
  .brand .sub{display:none}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .eyebrow-tag{font-size:.74rem;padding:6px 12px}
}