/* =========================================================================
   BOXSTK Industrial — unified design system
   One set of tokens, one component vocabulary, used by every page.
   ========================================================================= */
:root{
  /* palette */
  --navy:#0b1f33; --navy2:#123452; --navy3:#081726;
  --accent:#f59e0b; --accent2:#fbbf24;
  --ink:#16283a; --body:#33475c; --muted:#52677d;
  --bg:#f5f7fa; --surface:#fff; --line:#e2e8f0; --line2:#eef2f7;
  --green:#25d366;         /* brand accent: icon circles only, never text background */
  --green-btn:#0b7a3b;     /* WCAG-AA white text (5.44:1) */
  --gold:#8a5a0c;          /* WCAG-AA on white / light bg (5.5:1) */
  --tg:#229ed9; --link:#0b64b4;

  /* system tokens — every component uses these */
  --r-sm:8px; --r:12px; --r-lg:18px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,31,51,.05);
  --sh-2:0 4px 16px rgba(11,31,51,.07);
  --sh-3:0 16px 36px rgba(11,31,51,.13);
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:32px; --sp-5:48px; --sp-6:72px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1160px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;letter-spacing:-.02em;margin:0}
p{margin:0}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button,input,textarea,select{font:inherit}
::selection{background:var(--accent2);color:var(--navy3)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* Shared typography scale */
.kicker{display:block;color:var(--gold);font-weight:800;letter-spacing:.16em;font-size:11px;text-transform:uppercase;margin-bottom:12px}
h2{font-size:clamp(24px,3vw,32px);font-weight:800}
h3{font-size:17px;font-weight:700}
.lead{color:var(--muted);max-width:760px;font-size:16px;line-height:1.75;margin-top:10px}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{margin-bottom:0}
.section-head .lead{margin-top:12px}
.skip{position:absolute;left:-9999px;top:0;z-index:300;background:var(--accent);color:var(--navy3);padding:10px 18px;border-radius:var(--r-sm);font-weight:700}
.skip:focus{left:16px;top:16px}

/* Unified icon system — all inline SVGs, one stroke language */
svg.i{width:22px;height:22px;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;fill:none;flex:none}
.ico{width:46px;height:46px;border-radius:var(--r);background:#eef3f9;color:var(--navy2);display:flex;align-items:center;justify-content:center;flex:none}
.ico svg.i{width:23px;height:23px}
.pmedia svg.i{width:54px;height:54px;stroke-width:1.3;color:#7c96ae}
.btn svg.i,.toplinks svg.i,.certs svg.i,.chan svg.i,.kicker svg.i{width:18px;height:18px;stroke-width:1.7}
.toplinks svg.i{width:14px;height:14px;display:inline-block;vertical-align:-2px;margin-right:5px}
.certs svg.i{width:17px;height:17px}
.chan svg.i{width:22px;height:22px;stroke:#fff;color:#fff}
.card svg.i,.linkcard svg.i{color:var(--navy2)}

/* =========================================================================
   Header — one consistent chrome on every page
   ========================================================================= */
.topbar{background:var(--navy3);color:#aebfd0;font-size:12px}
.topbar .wrap{height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.toplinks{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.toplinks a{opacity:1;transition:color .2s var(--ease)}
.toplinks a:hover{color:var(--accent2);opacity:1}
.toplinks .sep{width:1px;height:12px;background:rgba(255,255,255,.18)}
.topbar .tagline{letter-spacing:.02em;opacity:.75;white-space:nowrap}

nav{background:var(--navy);color:#fff;position:sticky;top:0;z-index:70;box-shadow:0 1px 0 rgba(255,255,255,.06)}
.nav-inner{height:66px;display:flex;align-items:center;justify-content:space-between;gap:18px;min-width:0}
.logo{font-size:19px;font-weight:800;letter-spacing:.01em;color:#fff;flex:none}
.logo span{color:var(--accent)}
.nav-tools{display:flex;align-items:center;gap:18px;flex:none;min-width:0}
.nav-links{display:flex;align-items:center;gap:22px;flex-wrap:nowrap;min-width:0}
.nav-links>a{font-size:13.5px;font-weight:500;color:rgba(255,255,255,.8);position:relative;padding:6px 0;transition:color .2s var(--ease);white-space:nowrap}
.nav-links>a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--accent);transition:right .25s var(--ease)}
.nav-links>a:hover,.nav-links>a[aria-current="page"]{color:#fff}
.nav-links>a:hover::after,.nav-links>a[aria-current="page"]::after{right:0}
.lang-btn{border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.05);color:#fff;padding:6px 13px;border-radius:var(--r-sm);font-size:12.5px;font-weight:600;white-space:nowrap;flex:none;margin-left:4px;transition:.2s var(--ease)}
.lang-btn:hover{border-color:#7cc0ff;color:#fff;background:rgba(255,255,255,.14)}
.burger{display:none;width:38px;height:36px;border:1px solid rgba(255,255,255,.28);border-radius:var(--r-sm);background:transparent;color:#fff;font-size:17px;line-height:1;cursor:pointer}

/* Reading progress bar (article pages) */
#readingProgress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));z-index:120;transition:width .1s linear;pointer-events:none}

/* =========================================================================
   Hero — home
   ========================================================================= */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 100%);color:#fff;position:relative;overflow:hidden;padding:64px 0 68px}
.hero::before{content:"";position:absolute;width:760px;height:760px;right:-220px;top:-380px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,150,.42),transparent 68%)}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.032) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.032) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(180deg,#000,transparent 85%)}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.8fr);gap:56px;align-items:center}
.hero h1{color:#fff;font-size:clamp(30px,3.7vw,46px);font-weight:800;max-width:720px;line-height:1.16}
.hero .sub{color:rgba(255,255,255,.86);font-size:16.5px;line-height:1.75;max-width:640px;margin-top:20px}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}
.chip{border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.055);color:rgba(255,255,255,.9);border-radius:var(--r-pill);padding:5px 13px;font-size:12px;font-weight:500}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:48px;padding-top:26px;border-top:1px solid rgba(255,255,255,.13)}
.stat b{display:block;color:var(--accent2);font-size:26px;font-weight:800;line-height:1.2}
.stat span{font-size:12px;color:rgba(255,255,255,.78)}

/* Quick RFQ card — the one interactive module on the first screen */
.quick{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);border-radius:var(--r-lg);padding:24px;backdrop-filter:blur(8px);box-shadow:0 20px 50px rgba(0,0,0,.18)}
.quick h3,.quick .quick-title{color:#fff;font-size:17px;margin-bottom:4px}
.quick .q-sub{color:rgba(255,255,255,.78);font-size:12.5px;margin-bottom:18px}
.quick label{display:block;font-size:11.5px;font-weight:700;letter-spacing:.05em;color:rgba(255,255,255,.86);margin:0 0 6px;text-transform:uppercase}
.quick .field{margin-bottom:13px}
.quick input,.quick select{width:100%;padding:11px 12px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);color:#fff;font-size:14px;transition:border-color .2s var(--ease),background .2s var(--ease)}
.quick input::placeholder{color:rgba(255,255,255,.42)}
.quick input:focus,.quick select:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,.13)}
.quick select option{color:var(--ink)}
.quick .btn{width:100%;margin-top:4px}
.quick .q-note{font-size:11.5px;color:rgba(255,255,255,.74);margin-top:12px;line-height:1.5}

/* Page hero — identical on all inner pages */
.page-hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 100%);color:#fff;padding:38px 0 40px;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;width:420px;height:420px;right:-120px;top:-260px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,150,.4),transparent 70%)}
.page-hero .wrap{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:12.5px;color:rgba(255,255,255,.82);margin-bottom:16px}
.breadcrumb a{color:inherit}
.breadcrumb a:hover{color:#a7d4ff;text-decoration:underline}
.breadcrumb .div{opacity:.4}
.page-hero h1{color:#fff;font-size:clamp(25px,3vw,34px);font-weight:800;max-width:850px}
.page-hero p{color:rgba(255,255,255,.86);font-size:15.5px;max-width:780px;margin-top:12px}

/* =========================================================================
   Sections + shared components
   ========================================================================= */
section{padding:var(--sp-6) 0}
section.tight{padding:var(--sp-5) 0}
.alt{background:var(--surface);border-top:1px solid var(--line2);border-bottom:1px solid var(--line2)}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* Buttons — one vocabulary */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-sm);font-size:14px;font-weight:700;border:1px solid transparent;cursor:pointer;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--accent);color:#12202e;box-shadow:0 6px 18px rgba(245,158,11,.22)}
.btn-primary:hover{background:var(--accent2);box-shadow:0 10px 24px rgba(245,158,11,.3)}
.btn-wa{background:var(--green-btn);color:#fff;box-shadow:0 6px 18px rgba(37,211,102,.2)}
.btn-wa:hover{box-shadow:0 10px 24px rgba(37,211,102,.3)}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff;background:rgba(255,255,255,.04)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent2);background:rgba(245,158,11,.08)}
.btn-outline{border-color:var(--line);color:var(--ink);background:var(--surface)}
.btn-outline:hover{border-color:var(--navy2);box-shadow:var(--sh-2)}

/* Product / link cards — equal height, identical hover language */
.pcard,.linkcard,.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}
.pcard:hover,.linkcard:hover{transform:translateY(-5px);box-shadow:var(--sh-3);border-color:#c9d9ea}
.pcard{display:flex;flex-direction:column;overflow:hidden}
.pmedia{height:132px;background:linear-gradient(135deg,#f0f5fa,#e6eef7);display:flex;align-items:center;justify-content:center;position:relative;border-bottom:1px solid var(--line2)}
.pmedia .tag{position:absolute;top:12px;left:12px;background:rgba(11,31,51,.8);color:#fff;font-size:11px;padding:4px 10px;border-radius:var(--r-pill)}
.pbody{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.pbody h3{font-size:16.5px}
.pbody p{font-size:13.5px;color:var(--muted);line-height:1.6}
.pfoot{margin-top:auto;padding-top:6px;display:flex;gap:8px}
.pfoot a,.pfoot span{flex:1;text-align:center;font-size:12.5px;padding:9px 0;border-radius:var(--r-sm);border:1px solid var(--line);color:var(--ink);font-weight:600;transition:.2s var(--ease)}
.pfoot a.wa{border-color:rgba(11,122,59,.4);color:#0e7036}
.pfoot a:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.pfoot span{color:var(--navy2);background:#f7fafc}
.linkcard{padding:22px;display:flex;flex-direction:column;gap:10px}
.linkcard h3{margin-top:2px}
.linkcard p{font-size:13.5px;color:var(--muted);line-height:1.6;flex:1}
.linkcard .arrow{color:var(--gold);font-weight:700;font-size:12.5px;margin-top:2px;transition:transform .2s var(--ease)}
.linkcard:hover .arrow{transform:translateX(4px)}
.card{padding:22px}
.card h3{margin:14px 0 8px}
.card p{font-size:13.5px;color:var(--muted);line-height:1.65}
.feature{border-left:3px solid var(--accent)}
a.card{display:block;color:inherit}
.card[data-href]{cursor:pointer}
a.card:hover,.card[data-href]:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:#c9d9ea}
a.card:hover h3,.card[data-href]:hover h3{color:var(--navy2)}

/* Process steps */
.step .ico{width:38px;height:38px;border-radius:50%;background:var(--accent);color:#12202e;font-weight:800;font-size:15px}

/* Cert strip */
.certs{background:var(--navy);color:#fff;padding:22px 0;border:0}
.certs .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.certs .badge{display:flex;align-items:center;gap:9px;font-size:13px;font-weight:700;color:rgba(255,255,255,.92)}
.certs .badge svg.i{color:var(--accent2)}
.certs .badge span{font-size:11.5px;font-weight:400;color:rgba(255,255,255,.74)}

/* =========================================================================
   Prose / article layout
   ========================================================================= */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 272px;gap:44px;align-items:start}
.prose{max-width:800px;font-size:15.5px;color:var(--body);line-height:1.8}
.prose h2{font-size:23px;margin:42px 0 14px;padding-top:6px;scroll-margin-top:90px}
.prose h3{font-size:18px;margin:28px 0 10px}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px}
.prose li{margin-bottom:9px}
.prose strong{color:var(--ink)}
.prose a{color:var(--link);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:#084c8a}
.prose blockquote{border-left:3px solid var(--accent);background:#fff8e9;padding:16px 20px;margin:22px 0;border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:14.5px;line-height:1.8}
.prose .callout{background:#edf5fc;border:1px solid #d3e5f5;border-radius:var(--r);padding:16px 20px;margin:24px 0;font-size:14.5px}
.prose .meta{font-size:12.5px;color:var(--muted);margin-bottom:26px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.prose table{width:100%;border-collapse:separate;border-spacing:0;margin:22px 0;font-size:13.5px;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.prose th,.prose td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line2)}
.prose th{background:#f0f5fa;color:var(--navy);font-weight:700;font-size:12.5px;letter-spacing:.01em}
.prose tr:last-child td{border-bottom:0}
.prose tr:nth-child(even) td{background:#fbfcfe}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 22px;margin:0 0 32px;box-shadow:var(--sh-1)}
.toc b{display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc ol{margin:0;padding-left:18px;font-size:13.5px;list-style:none;counter-reset:toc}
.toc li{counter-increment:toc;margin:6px 0;padding-left:2px}
.toc li::before{content:counter(toc) ".";display:inline-block;width:22px;color:#a9bacb;font-variant-numeric:tabular-nums}
.toc a{color:var(--body);text-decoration:none;transition:color .2s var(--ease)}
.toc a:hover,.toc a.active{color:var(--gold);font-weight:700}
.spectable{width:100%;border-collapse:separate;border-spacing:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:14px;box-shadow:var(--sh-1)}
.spectable th,.spectable td{padding:12px 16px;border-bottom:1px solid var(--line2);text-align:left}
.spectable th{width:31%;background:#f5f8fc;color:var(--navy);font-weight:700}
.spectable tr:last-child th,.spectable tr:last-child td{border-bottom:0}
.sidebar{position:sticky;top:88px}
.sidebar .box{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin-bottom:16px;box-shadow:var(--sh-1)}
.sidebar h3{font-size:14px;margin-bottom:12px;color:var(--navy)}
.sidebar ul{list-style:none;font-size:13.5px}
.sidebar li{padding:8px 0;border-bottom:1px solid var(--line2)}
.sidebar li:last-child{border:0}
.sidebar a:hover{color:var(--link)}
.sidebar p{font-size:13px;color:var(--muted)}

/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);margin-bottom:10px;overflow:hidden;box-shadow:var(--sh-1);transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.faq details:hover{border-color:#c9d9ea}
.faq details[open]{border-color:#c9d9ea;box-shadow:var(--sh-2)}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:700;font-size:15px;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:20px;line-height:1;font-weight:600;transition:transform .2s var(--ease)}
.faq details[open] summary::after{content:"−"}
.faq details[open] summary{border-bottom:1px solid var(--line2);color:var(--gold)}
.faq .answer{padding:16px 20px;font-size:14px;color:var(--muted);line-height:1.75}
.faq .answer p+p{margin-top:10px}
.faq .answer a{color:var(--link);text-decoration:underline}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--navy2),var(--navy));color:#fff;padding:42px 0}
.cta-band .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-band h2{font-size:23px;color:#fff}
.cta-band p{color:rgba(255,255,255,.82);font-size:13.5px;margin-top:6px}
.cta-band .cta-row{margin:0}

/* =========================================================================
   Contact
   ========================================================================= */
.contact{background:var(--navy2);color:#fff}
.contact h2,.contact .kicker{color:#fff}
.contact .lead{color:rgba(255,255,255,.7)}
.contact-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:36px;align-items:start;margin-top:8px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.full{grid-column:1/-1}
input:not(.quick input),textarea,select:not(.quick select){width:100%;padding:12px 14px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.07);color:#fff;font-size:14px;transition:border-color .2s var(--ease),background .2s var(--ease)}
input::placeholder,textarea::placeholder{color:rgba(255,255,255,.42)}
input:focus,textarea:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,.12)}
textarea{min-height:126px;resize:vertical}
.form-note{font-size:11.5px;color:rgba(255,255,255,.68);line-height:1.6;grid-column:1/-1}
#formStatus{background:rgba(37,211,102,.14);border:1px solid rgba(37,211,102,.35);border-radius:var(--r-sm);padding:11px 14px;color:#d8ffe7}
.channels{display:flex;flex-direction:column;gap:12px}
.chan{display:flex;align-items:center;gap:14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r);padding:15px;transition:border-color .2s var(--ease),background .2s var(--ease)}
.chan:hover{border-color:var(--accent);background:rgba(255,255,255,.1)}
.chan .ic{width:42px;height:42px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;flex:none}
.chan.wa .ic{background:var(--green)}
.chan.tg .ic{background:var(--tg)}
.chan.em .ic{background:var(--accent)}
.chan b{display:block;font-size:14.5px;color:#fff}
.chan span span{font-size:12.5px;color:rgba(255,255,255,.82)}

/* =========================================================================
   Footer
   ========================================================================= */
footer.site{background:var(--navy3);color:rgba(255,255,255,.6);padding:52px 0 22px;font-size:13.5px}
.footer-grid{display:grid;grid-template-columns:1.6fr repeat(4,minmax(0,1fr));gap:28px;margin-bottom:36px}
footer.site h4,footer.site h3{color:#fff;font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px}
footer.site ul{list-style:none}
footer.site li{margin-bottom:9px}
footer.site a:hover{color:var(--accent2)}
.brand-note{color:rgba(255,255,255,.7);font-size:12.5px;line-height:1.7;margin-top:12px;max-width:330px}
.brand-note a{color:var(--accent2)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding-top:20px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:11.5px}

/* Floating / back-to-top */
.float{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:10px;z-index:80}
.float a{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-3);transition:transform .2s var(--ease)}
.float a:hover{transform:translateY(-3px) scale(1.05)}
.float .wa{background:var(--green)}
.float .tg{background:var(--tg)}
#backTop{position:fixed;right:20px;bottom:130px;width:40px;height:40px;border-radius:50%;background:var(--navy);color:#fff;border:1px solid rgba(255,255,255,.16);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(8px);transition:.25s var(--ease);z-index:80;box-shadow:var(--sh-2)}
#backTop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
#backTop svg.i{width:18px;height:18px}
.mobile-cta{display:none}

/* =========================================================================
   Scroll reveal — JS adds .reveal, so content stays visible without JS
   ========================================================================= */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* =========================================================================
   Responsive
   ========================================================================= */
@media(max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .quick{max-width:520px}
  .layout{grid-template-columns:minmax(0,1fr) 240px;gap:28px}
}
@media(max-width:900px){
  .burger{display:block}
  .nav-links{position:absolute;top:66px;left:0;right:0;background:var(--navy);flex-direction:column;align-items:stretch;gap:0;padding:6px 24px 16px;border-top:1px solid rgba(255,255,255,.1);display:none;box-shadow:0 14px 26px rgba(0,0,0,.24)}
  .nav-links.open{display:flex}
  .nav-links>a{padding:12px 0;font-size:15px;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-links>a::after{display:none}
  .g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .topbar .tagline{display:none}
  .hero-stats{gap:14px}
}
@media(max-width:640px){
  body{padding-bottom:62px}
  .wrap{padding:0 18px}
  section{padding:var(--sp-5) 0}
  .hero{padding:44px 0 48px}
  .hero h1{font-size:29px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:18px;margin-top:34px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .contact-grid,.form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band .wrap{flex-direction:column;align-items:flex-start}
  .certs .wrap{gap:12px}
  .float{display:none}
  #backTop{display:none}
  .mobile-cta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -4px 20px rgba(11,31,51,.1);padding:9px 14px;gap:10px}
  .mobile-cta a{flex:1;text-align:center;padding:11px 8px;border-radius:var(--r-sm);font-size:13px;font-weight:700}
  .mobile-cta .m-wa{background:var(--green-btn);color:#fff}
  .mobile-cta .m-rfq{background:var(--navy);color:#fff}
  .page-hero{padding:30px 0 32px}
  .quick{padding:20px}
  .prose table{font-size:12.5px}
  .prose th,.prose td{padding:9px 10px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}