:root{
  --ink:#12161a; --muted:#5a626c; --faint:#8b9199;
  --line:#e4e2dc; --line-strong:#c9c6be;
  --bg:#ffffff; --surface:#f7f6f2; --surface-2:#efede6; --paper:#fbfaf7;
  --accent:#0f5a4c; --accent-ink:#0a3f35; --accent-soft:#e9f1ee;
  --dark:#0b2a25; --dark-2:#123c33; --sand:#efe9dc;
  --max:1180px;
  --ease:cubic-bezier(.2,.6,.25,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px; line-height:1.62; -webkit-font-smoothing:antialiased;
  font-feature-settings:"kern" 1;
}
img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
:focus-visible{outline:2px solid var(--accent); outline-offset:3px}
.wrap{max-width:var(--max); margin:0 auto; padding:0 28px}
.rule{height:1px; background:var(--line); border:0; margin:0}

/* ---------- header ---------- */
header.site{position:sticky; top:0; z-index:60; background:rgba(255,255,255,.92); backdrop-filter:saturate(180%) blur(10px); border-bottom:1px solid var(--line)}
.bar{display:flex; align-items:center; justify-content:space-between; height:70px; gap:24px}
.brand{display:flex; align-items:baseline; gap:10px; font-weight:500; letter-spacing:.02em}
.brand b{font-size:16px; letter-spacing:.06em}
.brand span{font-size:11px; color:var(--faint); letter-spacing:.14em; text-transform:uppercase}
nav.main{display:flex; gap:26px; align-items:center; font-size:14px}
nav.main a{color:var(--muted); padding:6px 0; border-bottom:1px solid transparent; transition:color .15s, border-color .15s}
nav.main a:hover{color:var(--ink); border-color:var(--ink)}
.lang{display:flex; gap:2px; border:1px solid var(--line); border-radius:2px; overflow:hidden}
.lang a{font-size:11px; letter-spacing:.08em; padding:5px 9px; color:var(--muted)}
.lang a[aria-current="true"]{background:var(--ink); color:#fff}
.hgroup{display:flex; align-items:center; gap:14px}

/* mobile menu — works without JS */
details.mnav{display:none; position:relative}
details.mnav summary{list-style:none; cursor:pointer; width:34px; height:34px; display:grid; place-items:center; border:1px solid var(--line); border-radius:2px}
details.mnav summary::-webkit-details-marker{display:none}
details.mnav summary span{display:block; width:15px; height:1.5px; background:var(--ink); position:relative}
details.mnav summary span:before,details.mnav summary span:after{content:""; position:absolute; left:0; width:15px; height:1.5px; background:var(--ink)}
details.mnav summary span:before{top:-5px}
details.mnav summary span:after{top:5px}
details.mnav nav{position:absolute; right:0; top:44px; width:min(78vw,300px); background:#fff; border:1px solid var(--line); box-shadow:0 18px 40px rgba(12,20,18,.12); padding:10px}
details.mnav nav a{display:block; padding:12px 12px; font-size:15px; border-bottom:1px solid var(--line)}
details.mnav nav a:last-child{border-bottom:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex; align-items:center; gap:9px; padding:13px 22px; border-radius:2px; font-size:14px; border:1px solid var(--ink); background:var(--ink); color:#fff; transition:background .18s var(--ease), color .18s, border-color .18s, transform .18s}
.btn:hover{background:#000; transform:translateY(-1px)}
.btn.ghost{background:transparent; color:var(--ink)}
.btn.ghost:hover{border-color:var(--accent); color:var(--accent); background:transparent}
.btn.light{background:#fff; color:var(--dark); border-color:#fff}
.btn.light:hover{background:var(--sand); border-color:var(--sand)}
.btn.on-dark{background:transparent; color:#fff; border-color:rgba(255,255,255,.42)}
.btn.on-dark:hover{border-color:#fff; background:rgba(255,255,255,.08)}
.btn-sm{font-size:13px; padding:9px 15px}

/* ---------- hero (inner pages) ---------- */
.hero{padding:80px 0 52px; border-bottom:1px solid var(--line)}
.eyebrow{font-size:11px; letter-spacing:.18em; text-transform:uppercase; color:var(--faint); margin-bottom:20px}
h1{font-size:clamp(32px,4.4vw,52px); line-height:1.07; letter-spacing:-.024em; font-weight:500; margin:0 0 22px; max-width:19ch}
.hero p.lead{font-size:18px; line-height:1.6; color:var(--muted); max-width:58ch; margin:0 0 32px}
.hero .cta{display:flex; gap:12px; flex-wrap:wrap}

/* ---------- home hero ---------- */
.hero-home{background:radial-gradient(120% 140% at 78% 18%, #17473c 0%, var(--dark) 46%, #081f1b 100%); color:#fff; position:relative; overflow:hidden}
.hero-video{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; object-position:center; z-index:0}
.hero-scrim{position:absolute; inset:0; z-index:1;
  background:linear-gradient(97deg, rgba(8,31,27,.95) 6%, rgba(8,31,27,.82) 36%, rgba(8,31,27,.42) 64%, rgba(8,31,27,.5) 100%)}
.hero-home:before{content:""; position:absolute; inset:0; z-index:2;
  background-image:linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:64px 64px; mask-image:radial-gradient(90% 80% at 20% 40%, #000 30%, transparent 78%); pointer-events:none}
.hero-home .wrap, .hero-home .hgrid{position:relative; z-index:3}
.hgrid{display:grid; grid-template-columns:minmax(0, 660px); gap:56px; align-items:center; padding:88px 0 76px; position:relative}
.hero-home .eyebrow{color:rgba(255,255,255,.62)}
.hero-home h1{color:#fff; max-width:16ch; font-size:clamp(34px,4.6vw,56px)}
.hero-home p.lead{color:rgba(255,255,255,.74); max-width:46ch}
.hero-home .cta{margin-top:32px}
.hpoints{display:flex; gap:26px; flex-wrap:wrap; margin:38px 0 0; padding:22px 0 0; border-top:1px solid rgba(255,255,255,.16); list-style:none}
.hpoints li{font-size:12.5px; letter-spacing:.05em; color:rgba(255,255,255,.68); display:flex; align-items:center; gap:8px}
.hpoints li:before{content:""; width:5px; height:5px; background:#7fd3b9; display:block; border-radius:50%}

/* ---------- stats ---------- */
.stats{display:grid; grid-template-columns:repeat(4,1fr); gap:0; border-bottom:1px solid var(--line)}
.stats div{padding:28px 0 28px 26px; border-left:1px solid var(--line)}
.stats div:first-child{border-left:0; padding-left:0}
.stats b{display:block; font-size:28px; font-weight:500; letter-spacing:-.02em; line-height:1.1}
.stats span{font-size:12px; color:var(--faint); letter-spacing:.04em}

/* ---------- sections ---------- */
section{padding:78px 0}
section.tight{padding:52px 0}
.s-head{display:flex; justify-content:space-between; align-items:flex-end; gap:32px; margin-bottom:36px; padding-bottom:16px; border-bottom:1px solid var(--line)}
.s-head h2{font-size:clamp(19px,2vw,23px); letter-spacing:-.012em; font-weight:500; margin:0; color:var(--ink); line-height:1.25}
.s-head p{margin:0; font-size:14px; color:var(--muted); max-width:52ch}
.s-head a{font-size:13px; color:var(--accent); white-space:nowrap}
h2.big{font-size:clamp(25px,3vw,36px); line-height:1.16; letter-spacing:-.018em; font-weight:500; margin:0 0 18px; max-width:22ch}
.prose{max-width:66ch; color:var(--muted)}
.prose p{margin:0 0 18px; font-size:16.5px}
.prose strong{color:var(--ink); font-weight:500}

/* ---------- category grid ---------- */
.grid{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line)}
.card{background:var(--bg); display:flex; flex-direction:column; min-height:158px; transition:background .18s}
.card:hover{background:var(--paper)}
.card .cthumb{aspect-ratio:4/3; background:linear-gradient(160deg,#fbfaf7,#f1efe8); display:grid; place-items:center; overflow:hidden}
.card .cthumb img{width:100%; height:100%; object-fit:contain; mix-blend-mode:multiply; transition:transform .5s var(--ease)}
.card:hover .cthumb img{transform:scale(1.045)}
.card .cbody{padding:18px 20px 20px; display:flex; flex-direction:column; gap:7px; flex:1}
.card .n{font-size:11px; color:var(--faint); letter-spacing:.1em}
.card h3{font-size:15.5px; font-weight:500; margin:0; letter-spacing:-.006em}
.card p{font-size:13.5px; color:var(--muted); margin:0; line-height:1.5}
.card .count{margin-top:auto; padding-top:12px; font-size:12px; color:var(--accent); letter-spacing:.02em}

/* ---------- claims ---------- */
.claims{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line)}
.claim{background:var(--bg); padding:28px 24px}
.claim b{display:block; font-size:15px; font-weight:500; margin-bottom:8px}
.claim p{font-size:14px; color:var(--muted); margin:0; line-height:1.6}
.claim .src{display:block; margin-top:12px; font-size:11px; color:var(--faint); letter-spacing:.02em}
.claim .src:before{content:"— "}

/* ---------- split block ---------- */
.split{display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:start}

/* ---------- product list ---------- */
.plist{display:grid; grid-template-columns:repeat(3,1fr); gap:30px 26px}
.pcard{border:1px solid var(--line); display:flex; flex-direction:column; transition:border-color .18s, transform .18s var(--ease)}
.pcard:hover{border-color:var(--line-strong); transform:translateY(-2px)}
.pcard .thumb{background:linear-gradient(160deg,#fbfaf7,#f1efe8); aspect-ratio:4/3; display:flex; align-items:center; justify-content:center; overflow:hidden}
.pcard .thumb img{width:100%; height:100%; object-fit:contain; mix-blend-mode:multiply; transition:transform .5s var(--ease)}
.pcard:hover .thumb img{transform:scale(1.045)}
.pcard .body{padding:16px 17px 18px; border-top:1px solid var(--line)}
.pcard .kicker{font-size:11px; color:var(--faint); letter-spacing:.08em; text-transform:uppercase}
.pcard h3{font-size:15px; font-weight:500; margin:5px 0 0; line-height:1.34}

/* ---------- product page ---------- */
.pgrid{display:grid; grid-template-columns:1.05fr 1fr; gap:56px; align-items:start}
.pmedia{position:sticky; top:96px}
.pmedia .stage{background:linear-gradient(160deg,#fbfaf7,#f0eee7); border:1px solid var(--line); aspect-ratio:1/1; display:flex; align-items:center; justify-content:center; overflow:hidden}
.pmedia .stage img{width:100%; height:100%; object-fit:contain; mix-blend-mode:multiply}
.thumbs{display:flex; gap:10px; margin-top:10px}
.thumbs button{padding:0; border:1px solid var(--line); background:var(--paper); width:76px; height:76px; cursor:pointer; overflow:hidden}
.thumbs button[aria-current="true"]{border-color:var(--accent)}
.thumbs img{width:100%; height:100%; object-fit:contain; mix-blend-mode:multiply}
h1.pname{font-size:clamp(26px,3.2vw,38px); max-width:26ch}
.chips{display:flex; flex-wrap:wrap; gap:8px; margin:22px 0 30px}
.chip{font-size:12.5px; padding:6px 11px; background:var(--accent-soft); color:var(--accent-ink); border-radius:2px}
table.spec{width:100%; border-collapse:collapse; font-size:14px; margin-top:6px}
table.spec th{text-align:left; font-weight:400; color:var(--muted); padding:11px 0; border-bottom:1px solid var(--line); width:46%; vertical-align:top}
table.spec td{padding:11px 0; border-bottom:1px solid var(--line); font-weight:500}
.buybox{border:1px solid var(--line); padding:24px; background:var(--paper)}
.buybox h3{margin:0 0 8px; font-size:15px; font-weight:500}
.buybox p{margin:0 0 16px; font-size:13.5px; color:var(--muted)}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(115deg,var(--dark) 0%, var(--dark-2) 100%); color:#fff; padding:44px 0}
.cta-band .wrap{display:flex; align-items:center; justify-content:space-between; gap:36px; flex-wrap:wrap}
.cta-band h2{font-size:clamp(21px,2.4vw,28px); font-weight:500; letter-spacing:-.015em; margin:0 0 8px; line-height:1.2; max-width:24ch}
.cta-band p{margin:0; font-size:14.5px; color:rgba(255,255,255,.66); max-width:52ch}
.cta-band .acts{display:flex; gap:12px; flex-wrap:wrap}

/* ---------- steps ---------- */
.steps{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line)}
.step{background:var(--bg); padding:26px 24px}
.step .n{font-size:11px; letter-spacing:.12em; color:var(--accent); margin-bottom:12px; display:block}
.step b{display:block; font-size:15px; font-weight:500; margin-bottom:6px}
.step p{font-size:13.5px; color:var(--muted); margin:0; line-height:1.55}

/* ---------- list ---------- */
ul.clean{list-style:none; padding:0; margin:0; display:grid; gap:11px}
ul.clean li{font-size:14.5px; padding-left:18px; position:relative; color:var(--muted)}
ul.clean li:before{content:""; position:absolute; left:0; top:.62em; width:6px; height:1px; background:var(--accent)}

/* ---------- faq ---------- */
.faq details{border-bottom:1px solid var(--line); padding:18px 0}
.faq summary{cursor:pointer; font-size:15.5px; font-weight:500; list-style:none; display:flex; justify-content:space-between; gap:20px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+"; color:var(--faint); font-weight:400}
.faq details[open] summary:after{content:"–"}
.faq p{font-size:14.5px; color:var(--muted); margin:12px 0 0; max-width:74ch}

/* ---------- form ---------- */
form.q{display:grid; grid-template-columns:1fr 1fr; gap:16px}
form.q .full{grid-column:1/-1}
label{display:block; font-size:12px; letter-spacing:.04em; color:var(--muted); margin-bottom:6px}
input,select,textarea{width:100%; font:inherit; font-size:14.5px; padding:11px 12px; border:1px solid var(--line-strong); border-radius:2px; background:#fff; color:var(--ink); transition:border-color .15s, box-shadow .15s}
input:focus,select:focus,textarea:focus{outline:none; border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft)}
textarea{min-height:110px; resize:vertical}
.note{font-size:11.5px; color:var(--faint); margin-top:12px}

/* ---------- breadcrumb ---------- */
.crumb{font-size:12px; color:var(--faint); padding:20px 0 0; display:flex; gap:8px; flex-wrap:wrap}
.crumb a:hover{color:var(--ink)}
.crumb span{color:var(--line-strong)}

/* ---------- footer ---------- */
footer.site{border-top:1px solid var(--line); background:var(--surface); padding:58px 0 34px}
.fgrid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1.2fr; gap:40px}
.fgrid h4{font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--faint); margin:0 0 14px; font-weight:500}
.fgrid a{display:block; font-size:13.5px; color:var(--muted); padding:3px 0}
.fgrid a:hover{color:var(--ink)}
.fnote{border-top:1px solid var(--line); margin-top:42px; padding-top:20px; font-size:11.5px; color:var(--faint); display:flex; justify-content:space-between; gap:24px; flex-wrap:wrap}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hgrid{grid-template-columns:1fr; gap:26px; padding:56px 0 48px}
  .hplate{min-height:320px; order:-1}
  .hplate img{max-width:380px}
}
@media (max-width:1000px){
  .grid,.plist,.steps,.claims{grid-template-columns:repeat(2,1fr)}
  .split,.pgrid,form.q{grid-template-columns:1fr; gap:32px}
  .pmedia{position:static}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stats div:nth-child(3){border-left:0; padding-left:0}
  .fgrid{grid-template-columns:1fr 1fr}
  nav.main{display:none}
  details.mnav{display:block}
}
@media (max-width:620px){
  .grid,.plist,.steps,.claims{grid-template-columns:1fr}
  .wrap{padding:0 20px}
  .hero{padding:52px 0 38px}
  section{padding:54px 0}
  .s-head{flex-direction:column; align-items:flex-start; gap:10px}
  .hpoints{gap:14px 20px}
  .stats b{font-size:24px}
  .cta-band .wrap{flex-direction:column; align-items:flex-start}
  .brand span{display:none}
  .bar{height:60px; gap:12px}
  .hgroup{gap:10px}
  .lang a{padding:5px 7px}
  .hgrid{padding:34px 0 38px; gap:22px}
  .hplate{min-height:250px; order:-1}
  .hplate img{width:64%; max-width:230px; height:auto}
  .hplate:before{width:60%}
  .hplate .plate-tag{display:none}
  .hero-home h1{font-size:clamp(30px,8.6vw,38px)}
  .hero-home .cta{margin-top:24px}
  .hpoints{margin-top:26px; padding-top:16px}
  .thumbs button{width:58px; height:58px}
}

/* ---------- motion preference ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important; transition:none!important; scroll-behavior:auto!important}
}

/* ---------- lead form ---------- */
form.q.compact{grid-template-columns:1fr; gap:14px; margin-top:6px}
.req{color:#b3261e}
.hp{position:absolute!important; left:-9999px!important; width:1px; height:1px; overflow:hidden}
input[aria-invalid="true"],textarea[aria-invalid="true"]{border-color:#b3261e; background:#fff8f7}
.lead-status{margin:12px 0 0; font-size:13px; min-height:0}
.lead-status.is-error{color:#b3261e}
.lead-status.is-sending{color:var(--muted)}
.lead-status.is-ok{color:var(--accent)}
.lead-ok{border:1px solid var(--accent); background:#f4faf7; padding:26px 24px; animation:fade .3s ease}
.lead-ok b{display:block; font-size:15px; font-weight:500; margin-bottom:10px}
.lead-ok p{margin:0 0 8px; font-size:14px; color:var(--ink)}
.lead-ok .ref{font-family:ui-monospace,SFMono-Regular,Menlo,monospace; color:var(--accent); letter-spacing:.02em}
.lead-ok .sub{font-size:13px; color:var(--muted)}
.buybox .datasheet{font-size:12.5px; margin:-6px 0 14px}
.buybox .datasheet a{color:var(--muted); text-decoration:none; border-bottom:1px solid var(--line-strong)}
.buybox .datasheet a:hover{color:var(--ink)}
@keyframes fade{from{opacity:0; transform:translateY(4px)} to{opacity:1; transform:none}}

/* ---------- legal / sitemap ---------- */
.legal{max-width:74ch; padding-bottom:40px}
.legal h2{font-size:15px; letter-spacing:.01em; margin:34px 0 10px; font-weight:600}
.legal h2:first-child{margin-top:0}
.legal p{font-size:14.5px; line-height:1.72; color:var(--muted); margin:0}
.sitemap-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(min(100%,290px),1fr)); gap:34px 44px; padding-bottom:40px}
.smap h3{font-size:13px; letter-spacing:.06em; text-transform:uppercase; margin:0 0 12px; font-weight:500}
.smap h3 a{text-decoration:none; color:var(--ink); border-bottom:1px solid var(--line-strong)}
.smap h3 span{color:var(--faint); font-size:11.5px; margin-left:4px}
.smap ul{font-size:13.5px; line-height:1.85}

@media (prefers-reduced-motion: reduce){
  .hero-video{display:none}
}