/* ===== Xiangyang Zheng — Product Engineering Portfolio (dark) ===== */
:root{
  --bg:#070b13;--bg-soft:#0b111d;--panel:#111a2b;--panel-2:#16223a;
  --ink:#eef3fa;--muted:#94a3ba;--faint:#66748c;
  --line:rgba(255,255,255,.08);--line-strong:rgba(255,255,255,.16);
  --accent:#38bdf8;--accent-2:#22d3ee;--accent-3:#34d399;
  --grad:linear-gradient(120deg,#38bdf8,#22d3ee 55%,#34d399);
  --tile:linear-gradient(160deg,#f4f7fa,#e6edf3);
  --radius:20px;--shadow:0 30px 80px rgba(0,0,0,.45);
  --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p{margin-top:0}
img{max-width:100%}
.shell{width:min(var(--maxw),calc(100% - 44px));margin-inline:auto}
.kicker{text-transform:uppercase;letter-spacing:.18em;font-size:.72rem;font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.section{padding:110px 0}
.section-head{max-width:720px;margin-bottom:52px}
.section-head h2{font-size:clamp(2rem,4vw,3.3rem);line-height:1.05;letter-spacing:-.04em;margin:14px 0 0}
.section-head p{color:var(--muted);font-size:1.08rem;margin:16px 0 0}
.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.74rem;font-weight:800;color:var(--accent)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;width:100%;
  background:rgba(7,11,19,.72);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.site-header .shell{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{font-size:1.15rem;font-weight:800;letter-spacing:-.02em;white-space:nowrap}
.brand span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.main-nav{display:flex;gap:26px;align-items:center}
.main-nav a{font-size:.9rem;color:var(--muted);position:relative;padding:6px 0}
.main-nav a:hover{color:var(--ink)}
.main-nav a:after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--grad);transition:width .25s}
.main-nav a:hover:after{width:100%}
.nav-btn{padding:9px 16px!important;border:1px solid var(--line-strong);border-radius:999px;color:var(--ink)!important}
.nav-btn:after{display:none}
.nav-btn:hover{border-color:var(--accent);background:rgba(56,189,248,.1)}
.menu-button{display:none;background:none;border:1px solid var(--line-strong);color:var(--ink);
  border-radius:10px;padding:8px 12px;font:inherit;font-size:.85rem}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 24px;border-radius:999px;font-weight:700;font-size:.95rem;
  transition:transform .2s,box-shadow .2s,background .2s,border-color .2s}
.btn-primary{background:var(--grad);color:#05121c;box-shadow:0 14px 34px rgba(34,211,238,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 44px rgba(34,211,238,.4)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent);background:rgba(56,189,248,.08);transform:translateY(-2px)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;overflow:hidden;text-align:center;padding:120px 0 90px}
.hero-bg{position:absolute;inset:0;z-index:0;
  background:
   radial-gradient(60% 55% at 50% 6%,rgba(56,189,248,.22),transparent 60%),
   radial-gradient(45% 40% at 82% 78%,rgba(52,211,153,.16),transparent 60%),
   radial-gradient(45% 40% at 15% 82%,rgba(34,211,238,.14),transparent 60%),
   var(--bg)}
.hero-bg:before{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent 78%);mask-image:radial-gradient(70% 60% at 50% 40%,#000,transparent 78%)}
.hero-inner{position:relative;z-index:1;max-width:940px;margin-inline:auto}
.hero-eyebrow{display:inline-block;border:1px solid var(--line-strong);border-radius:999px;padding:8px 18px;
  font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-bottom:30px;background:rgba(255,255,255,.02)}
.hero h1{font-size:clamp(3rem,8vw,6.6rem);line-height:.98;letter-spacing:-.05em;margin:0}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(1.4rem,3vw,2.1rem);font-weight:600;color:var(--ink);margin:22px 0 0;letter-spacing:-.02em}
.hero-tags{color:var(--muted);font-size:1.02rem;margin:22px auto 0;max-width:640px;letter-spacing:.01em}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:40px}
.scroll-cue{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:1;color:var(--faint);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase}

/* ---------- Stat band ---------- */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-soft)}
.stats .shell{display:grid;grid-template-columns:repeat(6,1fr)}
.stat{padding:40px 20px;text-align:center;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat b{display:block;font-size:clamp(1.7rem,2.6vw,2.5rem);letter-spacing:-.03em;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{display:block;margin-top:10px;color:var(--muted);font-size:.82rem;text-transform:uppercase;letter-spacing:.08em}

/* ---------- What I designed ---------- */
.designed{background:
  radial-gradient(50% 60% at 100% 0,rgba(56,189,248,.1),transparent 60%),var(--bg)}
.designed-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}
.designed-copy h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.04;letter-spacing:-.04em;margin:14px 0 20px}
.designed-copy p{color:var(--muted);font-size:1.08rem}
.designed-copy .badge{display:inline-block;margin-top:18px;padding:8px 16px;border-radius:999px;
  border:1px solid rgba(52,211,153,.4);color:var(--accent-3);font-weight:700;font-size:.82rem;background:rgba(52,211,153,.08)}
.designed-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.designed-grid div{display:flex;align-items:center;gap:12px;background:var(--panel);border:1px solid var(--line);
  border-radius:12px;padding:15px 16px;font-weight:600;font-size:.95rem;transition:border-color .2s,transform .2s}
.designed-grid div:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.designed-grid .ck{flex:none;width:22px;height:22px;border-radius:50%;background:var(--grad);color:#05121c;
  display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:900}

/* ---------- Capabilities ---------- */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  transition:transform .25s,border-color .25s,box-shadow .25s}
.cap-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.cap-ic{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;
  background:rgba(56,189,248,.12);color:var(--accent)}
.cap-ic svg{width:26px;height:26px}
.cap-card h3{font-size:1.25rem;letter-spacing:-.02em;margin:0 0 16px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{font-size:.82rem;border:1px solid var(--line);border-radius:999px;padding:7px 12px;color:var(--muted);
  background:rgba(255,255,255,.02)}
.cap-card:hover .chips span{border-color:var(--line-strong)}

/* ---------- Process timeline ---------- */
.process{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.process-track{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(150px,1fr);gap:0;overflow-x:auto;padding-bottom:8px}
.pstep{position:relative;padding:0 14px}
.pstep .dot{width:16px;height:16px;border-radius:50%;background:var(--grad);position:relative;z-index:2;box-shadow:0 0 0 6px rgba(56,189,248,.12)}
.pstep .bar{position:absolute;top:8px;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--accent),var(--accent-3));opacity:.35;z-index:1}
.pstep:first-child .bar{left:50%}
.pstep:last-child .bar{right:50%}
.pstep b{display:block;margin-top:20px;font-size:.7rem;color:var(--faint);letter-spacing:.12em}
.pstep span{display:block;margin-top:6px;font-weight:700;font-size:.98rem;letter-spacing:-.01em}

/* ---------- Spotlights ---------- */
.spotlight{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:64px 0;border-top:1px solid var(--line)}
.spotlight:nth-child(even) .spot-media{order:2}
.spot-media{border-radius:24px;background:var(--tile);display:flex;align-items:center;justify-content:center;
  min-height:400px;padding:36px;border:1px solid var(--line);overflow:hidden}
.spot-media img{max-height:360px;object-fit:contain;transition:transform .4s}
.spotlight:hover .spot-media img{transform:scale(1.04)}
.spot-copy .eyebrow{margin-bottom:12px}
.spot-copy h3{font-size:clamp(2.2rem,4vw,3.4rem);letter-spacing:-.04em;line-height:1;margin:0 0 18px}
.spot-copy p{color:var(--muted);font-size:1.06rem;max-width:520px}
.spot-gas{margin:16px 0 0;color:var(--muted);font-size:.98rem;padding-left:14px;border-left:2px solid var(--accent)}
.spot-gas b{color:var(--ink);font-weight:700}
.spot-specs{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 30px}
.spot-specs span{border:1px solid var(--line-strong);border-radius:10px;padding:9px 14px;font-size:.86rem;font-weight:600;
  background:rgba(255,255,255,.02)}
.text-link{font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.text-link:hover{opacity:.85}

/* ---------- Product grid ---------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.product-card{position:relative;display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px;transition:transform .25s,border-color .25s,box-shadow .25s}
.product-card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.product-card.featured-card{grid-column:span 2}
.product-code{position:absolute;right:22px;top:16px;font-size:3.2rem;font-weight:800;letter-spacing:-.06em;color:rgba(255,255,255,.05)}
.project-number{text-transform:uppercase;letter-spacing:.14em;font-size:.68rem;font-weight:800;color:var(--accent);margin:0}
.product-image-wrap{height:200px;margin:14px 0 18px;border-radius:16px;background:var(--tile);
  display:flex;align-items:center;justify-content:center;overflow:hidden}
.featured-card .product-image-wrap{height:240px}
.product-image-wrap img{width:100%;height:100%;object-fit:contain;padding:14px;transition:transform .35s}
.product-card:hover .product-image-wrap img{transform:scale(1.05)}
.product-card h3{font-size:1.7rem;letter-spacing:-.03em;margin:0 0 14px;line-height:1.05}
.product-card p:not(.project-number){color:var(--muted);font-size:.96rem}
.mini-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:20px}
.mini-tags span{font-size:.74rem;border:1px solid var(--line);border-radius:999px;padding:7px 11px;color:var(--muted)}
.cert-note{font-size:.8rem;color:var(--faint);margin:26px 4px 0;max-width:980px}

/* BACnet highlight */
.bacnet-highlight{margin-top:36px;background:linear-gradient(140deg,var(--panel-2),var(--panel));border:1px solid var(--line-strong);
  border-radius:var(--radius);padding:42px 46px;display:grid;grid-template-columns:1.4fr .8fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.bacnet-highlight:before{content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,rgba(56,189,248,.4),transparent 62%)}
.bacnet-copy{position:relative;z-index:1}
.bacnet-copy h3{font-size:clamp(1.5rem,2.6vw,2.2rem);letter-spacing:-.03em;margin:12px 0 14px}
.bacnet-copy p{color:var(--muted);margin:0;font-size:1.01rem}
.bacnet-badges{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:10px}
.bacnet-badges span{border:1px solid var(--line-strong);border-radius:999px;padding:9px 15px;font-size:.82rem;font-weight:600}
.bacnet-badges .badge-primary{background:var(--grad);color:#05121c;border:0;font-weight:800}

/* ---------- Accessories ---------- */
.acc-lead{color:var(--muted);font-size:1.06rem;max-width:780px;margin:0 0 34px}
.acc-group{margin-top:32px}
.acc-group-title{font-size:.74rem;text-transform:uppercase;letter-spacing:.14em;color:var(--accent);font-weight:800;margin:0 0 16px}
.acc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.acc-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;
  transition:transform .25s,border-color .25s,box-shadow .25s}
.acc-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.acc-media{height:120px;border-radius:12px;background:var(--tile);display:flex;align-items:center;justify-content:center;
  margin-bottom:15px;overflow:hidden}
.acc-media img{max-width:100%;max-height:100%;object-fit:contain;padding:8px;transition:transform .3s}
.acc-card:hover .acc-media img{transform:scale(1.05)}
.acc-ic{display:flex;color:var(--accent)}
.acc-ic svg{width:42px;height:42px}
.acc-card strong{display:block;font-size:1.12rem;letter-spacing:-.02em;margin-bottom:8px}
.acc-card p{margin:0;color:var(--muted);font-size:.9rem}

/* ---------- Product timeline ---------- */
.ptl{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.ptl-list{position:relative;max-width:760px;margin:0 auto;padding-left:34px}
.ptl-list:before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--accent),var(--accent-3))}
.ptl-item{position:relative;padding:0 0 34px}
.ptl-item:last-child{padding-bottom:0}
.ptl-item:before{content:"";position:absolute;left:-34px;top:4px;width:16px;height:16px;border-radius:50%;
  background:var(--bg-soft);border:3px solid var(--accent)}
.ptl-item .yr{font-size:.76rem;font-weight:800;letter-spacing:.1em;color:var(--accent);text-transform:uppercase}
.ptl-item .nm{font-size:1.3rem;font-weight:700;letter-spacing:-.02em;margin-top:4px}
.ptl-item .ds{color:var(--muted);font-size:.95rem;margin-top:4px}

/* ---------- Innovation ---------- */
.innov-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.innov-grid div{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;
  display:flex;align-items:center;gap:14px;font-weight:600;transition:transform .2s,border-color .2s}
.innov-grid div:hover{transform:translateY(-3px);border-color:var(--accent)}
.innov-grid i{flex:none;width:10px;height:10px;border-radius:50%;background:var(--grad)}

/* ---------- Software ---------- */
.sw-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.sw-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:34px;transition:border-color .25s,transform .25s}
.sw-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.sw-card h3{font-size:1.6rem;letter-spacing:-.03em;margin:6px 0 12px}
.sw-card p,.sw-card li{color:var(--muted)}
.sw-card ul{padding-left:18px;margin:12px 0 0}
.sw-card li{margin:6px 0}
.sw-shots{display:flex;gap:12px;margin:20px 0 6px}
.sw-shots img{border-radius:12px;border:1px solid var(--line-strong);background:#0b1220;
  box-shadow:0 12px 30px rgba(0,0,0,.35);transition:transform .25s,box-shadow .25s}
.sw-shots img:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(0,0,0,.5)}
.sw-shots--win,.sw-shots--strip{flex-direction:column}
.sw-shots--win img{width:100%}
.sw-shots--strip{align-items:center}
.sw-shots--strip img{width:100%;max-width:480px}

/* ---------- About ---------- */
.about{background:radial-gradient(50% 70% at 0 100%,rgba(52,211,153,.08),transparent 60%),var(--bg)}
.about-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}
.about-wrap h2{font-size:clamp(2rem,4vw,3.2rem);letter-spacing:-.04em;line-height:1.04;margin:14px 0 0}
.about-body p{color:var(--muted);font-size:1.12rem;margin:0 0 20px}
.about-body p strong{color:var(--ink)}
.about-body .lead{color:var(--ink);font-size:1.3rem;font-weight:500;line-height:1.5}
.about-intro h2{font-size:clamp(1.9rem,3.4vw,2.7rem)}
.portrait{width:100%;max-width:320px;aspect-ratio:1/1;border-radius:22px;overflow:hidden;margin-bottom:26px;
  border:1px solid var(--line-strong);box-shadow:var(--shadow);position:relative}
.portrait:after{content:"";position:absolute;inset:0;border-radius:22px;pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
.portrait img{width:100%;height:100%;object-fit:cover;object-position:center 22%}
.about-role{margin:8px 0 0;font-weight:600;color:var(--muted);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Contact ---------- */
.contact{text-align:center;background:linear-gradient(180deg,var(--bg),var(--bg-soft))}
.contact h2{font-size:clamp(2.2rem,5vw,4rem);letter-spacing:-.04em;line-height:1.05;max-width:900px;margin:16px auto 0}
.contact p{color:var(--muted);font-size:1.1rem;margin:20px auto 0;max-width:640px}
.contact-email{display:inline-block;margin-top:30px;font-size:clamp(1.3rem,3vw,1.9rem);font-weight:700;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.contact-email:hover{opacity:.85}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:34px 0;display:flex;justify-content:space-between;gap:12px;
  color:var(--faint);font-size:.84rem;flex-wrap:wrap}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.visible{opacity:1;transform:none}

/* ---------- Case study (m-controller.html) ---------- */
.case-hero{padding:120px 0 60px}
.case-hero h1{font-size:clamp(2.6rem,6vw,5rem);letter-spacing:-.05em;line-height:1;margin:18px 0 24px}
.case-hero>p:not(.eyebrow){max-width:820px;font-size:1.25rem;color:var(--muted)}
.case-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:50px;border-top:1px solid var(--line);padding-top:24px}
.case-meta span{display:block;font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;color:var(--faint)}
.case-meta strong{display:block;margin-top:6px}
.case-banner{padding-bottom:80px}
.architecture-panel{height:520px;border-radius:24px;background:var(--panel);position:relative;overflow:hidden;border:1px solid var(--line)}
.architecture-panel:before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:40px 40px}
.architecture-node{position:absolute;z-index:2;background:var(--panel-2);border:1px solid var(--line-strong);padding:14px 20px;border-radius:12px;font-weight:800}
.central-node{left:50%;top:50%;transform:translate(-50%,-50%);background:var(--grad);color:#05121c;padding:26px 40px;font-size:1.4rem}
.node-a{left:7%;top:16%}.node-b{right:8%;top:16%}.node-c{left:7%;bottom:16%}.node-d{right:8%;bottom:16%}.node-e{left:50%;top:9%;transform:translateX(-50%)}
.case-content{display:grid;grid-template-columns:270px 1fr;gap:80px;padding-bottom:100px}
.case-sidebar{position:sticky;top:100px;align-self:start}
.case-sidebar ul{padding:0;list-style:none;margin:0}
.case-sidebar li{padding:13px 0;border-bottom:1px solid var(--line);font-size:.92rem;color:var(--muted)}
.case-main>section{padding-bottom:70px;margin-bottom:70px;border-bottom:1px solid var(--line)}
.case-main>section>p:not(.eyebrow){font-size:1.06rem;color:var(--muted);max-width:780px}
.contribution-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:30px}
.contribution-grid>div{background:var(--panel);border:1px solid var(--line);padding:26px;border-radius:16px}
.contribution-grid p{color:var(--muted)}
.tag-list{display:flex;flex-wrap:wrap;gap:12px}
.tag-list span{border:1px solid var(--line);border-radius:999px;padding:10px 15px;color:var(--muted)}
.source-note{background:var(--panel);padding:30px!important;border:1px solid var(--line)!important;border-radius:16px}
.project-nav{display:flex;gap:20px}
/* Gas detection capability page */
.case-content-full{padding-bottom:110px}
.gas-cat{margin-bottom:36px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px;overflow-x:auto}
.gas-cat-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.gas-cat-head h2{font-size:1.5rem;letter-spacing:-.03em;margin:0}
.gas-tech{font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;padding:7px 14px;border-radius:999px;background:var(--grad);color:#05121c}
.gas-table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:460px}
.gas-table th{text-align:left;font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--faint);font-weight:800;padding:0 14px 12px 0;border-bottom:1px solid var(--line-strong)}
.gas-table td{padding:13px 14px 13px 0;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top}
.gas-table tbody tr:last-child td{border-bottom:0}
.gas-table td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.gas-table td:nth-child(2){color:var(--accent);font-weight:600;white-space:nowrap}
.gas-back{margin-top:30px}
.project-product-photo{margin-top:40px;background:var(--tile);border:1px solid var(--line);border-radius:22px;padding:28px;display:flex;justify-content:center}
.project-product-photo img{width:min(520px,100%);height:360px;object-fit:contain}

/* ---------- v1.1: hero lede, glass, philosophy, certs ---------- */
.hero-brand{font-size:clamp(3rem,8vw,6rem);line-height:1;letter-spacing:-.045em;font-weight:900;margin:0;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-brand-sub{margin:16px 0 0;font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.34em;color:var(--muted)}
.hero-person{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;
  margin:30px auto 0;padding-top:26px;max-width:560px;border-top:1px solid var(--line)}
.hero-person strong{font-size:1.35rem;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.hero-person span{font-size:.95rem;color:var(--muted);padding-left:14px;border-left:1px solid var(--line-strong)}
.hero-lede{font-size:clamp(1.5rem,3.1vw,2.5rem);line-height:1.22;letter-spacing:-.03em;font-weight:800;margin:34px 0 0}
.hero-lede .lede-final{font-weight:600;color:var(--muted)}
.glass{background:rgba(255,255,255,.045);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.09)}
.stat.glass{border-left:1px solid rgba(255,255,255,.09)}
.stat b[data-count]{font-variant-numeric:tabular-nums}
.philosophy{background:radial-gradient(60% 80% at 50% 0,rgba(56,189,248,.08),transparent 60%),var(--bg)}
.philosophy-quote{max-width:960px;margin:0 0 46px;font-size:clamp(1.4rem,2.8vw,2.1rem);line-height:1.4;font-weight:500;color:var(--ink);border-left:3px solid var(--accent);padding-left:26px}
.philosophy-quote em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lifecycle{display:flex;flex-wrap:wrap;gap:14px 0;align-items:center}
.lifecycle .lc{position:relative;padding:12px 20px;border-radius:12px;font-weight:700;font-size:.95rem;background:rgba(255,255,255,.05);border:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.lifecycle .lc:not(:last-child){margin-right:34px}
.lifecycle .lc:not(:last-child):after{content:"→";position:absolute;right:-26px;top:50%;transform:translateY(-50%);color:var(--accent);font-weight:800}
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cert-card{border-radius:var(--radius);padding:28px;transition:transform .25s,border-color .25s}
.cert-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.cert-mark{display:inline-block;font-weight:800;font-size:1.05rem;letter-spacing:.02em;margin-bottom:14px;padding:8px 15px;border-radius:10px;background:var(--grad);color:#05121c}
.cert-card p{margin:0;color:var(--muted);font-size:.95rem}
@media(max-width:980px){.cert-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.hero-person{gap:6px}.hero-person span{border-left:0;padding-left:0}.hero-brand-sub{letter-spacing:.24em}
.cert-grid{grid-template-columns:1fr}.lifecycle{gap:10px}.lifecycle .lc{width:100%}.lifecycle .lc:not(:last-child){margin-right:0}.lifecycle .lc:not(:last-child):after{content:"↓";right:auto;left:50%;top:auto;bottom:-16px;transform:translateX(-50%)}}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .designed-wrap,.about-wrap{grid-template-columns:1fr;gap:34px}
  .cap-grid{grid-template-columns:1fr 1fr}
  .stats .shell{grid-template-columns:repeat(3,1fr)}
  .stat:nth-child(4){border-left:0}
  .stat:nth-child(-n+3){border-bottom:1px solid var(--line)}
  .bacnet-highlight{grid-template-columns:1fr}
  .product-grid{grid-template-columns:1fr 1fr}
  .product-card.featured-card{grid-column:span 2}
  .spotlight{grid-template-columns:1fr;gap:30px}
  .spotlight:nth-child(even) .spot-media{order:0}
  .case-content{grid-template-columns:1fr;gap:30px}
  .case-sidebar{position:static}
}
@media(max-width:640px){
  .main-nav{position:fixed;inset:70px 12px auto 12px;flex-direction:column;align-items:flex-start;gap:6px;
    background:var(--panel);border:1px solid var(--line-strong);border-radius:16px;padding:16px;display:none;box-shadow:var(--shadow)}
  .main-nav.open{display:flex}
  .main-nav a{padding:8px 4px;width:100%}
  .menu-button{display:block}
  .section{padding:76px 0}
  .cap-grid,.designed-grid,.contribution-grid,.sw-grid{grid-template-columns:1fr}
  .stats .shell{grid-template-columns:1fr 1fr}
  .stat{border-left:0;border-bottom:1px solid var(--line)}
  .stat:nth-child(odd){border-right:1px solid var(--line)}
  .product-grid,.acc-grid{grid-template-columns:1fr}
  .product-card.featured-card{grid-column:auto}
  .case-meta{grid-template-columns:1fr}
  .contribution-grid{grid-template-columns:1fr}
}