/* ============================================================
   Chiyu / detectelectro.com — design system
   Industrial detection equipment. Utility-code color language.
   ============================================================ */

:root{
  --ink:#14181d;
  --ink-2:#1d232b;
  --ink-3:#2a323c;
  --paper:#ffffff;
  --paper-2:#f4f6f8;
  --paper-3:#e8ecef;
  --line:#d7dde3;
  --line-dark:rgba(255,255,255,.14);
  --txt:#14181d;
  --txt-2:#4c5763;
  --txt-3:#8a95a1;
  --amber:#f5a800;
  --amber-deep:#c98600;
  --red:#e03c31;
  --orange:#f07c1e;
  --blue:#0072ce;
  --green:#007a33;
  --purple:#a01ca0;
  --radius:10px;
  --radius-lg:16px;
  --shadow:0 1px 2px rgba(20,24,29,.06),0 8px 24px rgba(20,24,29,.07);
  --shadow-lg:0 2px 4px rgba(20,24,29,.08),0 20px 48px rgba(20,24,29,.14);
  --sans:"Inter","Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"SF Mono",SFMono-Regular,ui-monospace,"Cascadia Mono",Consolas,"Roboto Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--sans);color:var(--txt);background:var(--paper);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}

h1,h2,h3,h4{line-height:1.15;margin:0;letter-spacing:-.02em;font-weight:700}
h1{font-size:clamp(2.1rem,4.6vw,3.5rem)}
h2{font-size:clamp(1.6rem,3vw,2.35rem)}
h3{font-size:1.15rem;letter-spacing:-.01em}
p{margin:0 0 1em;color:var(--txt-2)}
strong{color:var(--txt)}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.narrow{max-width:820px}

/* ---------- eyebrow / section head ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:.72rem;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--amber-deep);
  margin:0 0 14px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--amber)}
.sec{padding:88px 0}
.sec--tight{padding:64px 0}
.sec--paper{background:var(--paper-2)}
.sec--ink{background:var(--ink);color:#fff}
.sec--ink p{color:#b6bfc9}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head p{font-size:1.06rem;margin-top:14px}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head--center .eyebrow::before{display:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 26px;border-radius:8px;font-weight:600;font-size:.95rem;
  border:1.5px solid transparent;cursor:pointer;transition:.18s ease;
  letter-spacing:-.01em;line-height:1;
}
.btn svg{flex:0 0 auto}
.btn--amber{background:var(--amber);color:#14181d}
.btn--amber:hover{background:#ffbd1f;transform:translateY(-1px)}
.btn--ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:var(--ink-3)}
.btn--outline{border-color:var(--line);color:var(--txt)}
.btn--outline:hover{border-color:var(--ink);background:var(--paper-2)}
.btn--sm{padding:10px 18px;font-size:.86rem}

/* ---------- header ---------- */
.topbar{
  background:var(--ink);color:#9aa5b1;font-size:.8rem;
  border-bottom:1px solid var(--line-dark);
}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#cfd6dd}
.topbar a:hover{color:var(--amber)}
.topbar .tb-mail{display:flex;align-items:center;gap:7px}

.hdr{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:24px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:38px;height:38px}
.brand .b-name{font-weight:800;font-size:1.12rem;letter-spacing:-.02em;line-height:1.05}
.brand .b-name span{color:var(--amber-deep)}
.brand .b-sub{font-family:var(--mono);font-size:.6rem;letter-spacing:.2em;color:var(--txt-3);text-transform:uppercase;margin-top:3px}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  padding:9px 14px;border-radius:7px;font-size:.93rem;font-weight:500;color:var(--txt-2);
  transition:.15s;letter-spacing:-.01em;
}
.nav a:hover{color:var(--txt);background:var(--paper-2)}
.nav a.on{color:var(--txt);font-weight:600}
.nav .nav-cta{margin-left:10px}
.nav .nav-cta a{background:var(--ink);color:#fff;font-weight:600;padding:11px 20px}
.nav .nav-cta a:hover{background:var(--amber);color:#14181d}

.burger{display:none;background:none;border:0;padding:8px;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:var(--txt);margin:5px 0;transition:.2s}

/* ---------- hero ---------- */
.hero{
  position:relative;background:var(--ink);color:#fff;overflow:hidden;
  padding:104px 0 96px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 80% at 30% 20%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 80% at 30% 20%,#000 30%,transparent 78%);
}
.hero::after{
  content:"";position:absolute;right:-180px;top:-180px;width:640px;height:640px;border-radius:50%;
  border:1px solid rgba(245,168,0,.25);
  background:radial-gradient(circle at center,rgba(245,168,0,.09),transparent 62%);
}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero .kicker{
  display:inline-flex;align-items:center;gap:10px;background:rgba(245,168,0,.12);
  border:1px solid rgba(245,168,0,.32);color:var(--amber);border-radius:999px;
  padding:7px 16px;font-family:var(--mono);font-size:.72rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:26px;
}
.hero .kicker i{width:7px;height:7px;border-radius:50%;background:var(--amber);display:inline-block;animation:pulse 2.2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero p.lead{color:#aab4bf;font-size:1.1rem;max-width:520px;margin:22px 0 34px}
.hero h1 em{font-style:normal;color:var(--amber)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

.hero-stats{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line-dark);
  border:1px solid var(--line-dark);border-radius:var(--radius-lg);overflow:hidden;
}
.hero-stats .st{background:var(--ink-2);padding:26px 26px 22px}
.hero-stats .num{font-family:var(--mono);font-size:2rem;font-weight:700;color:#fff;letter-spacing:-.03em}
.hero-stats .num em{font-style:normal;color:var(--amber);font-size:1.15rem}
.hero-stats .lb{font-size:.82rem;color:#8d97a2;margin-top:5px;letter-spacing:.01em}

/* ---------- trust bar ---------- */
.trust{border-bottom:1px solid var(--line);background:var(--paper)}
.trust .wrap{display:flex;flex-wrap:wrap;gap:0;justify-content:space-between}
.trust .t-item{
  flex:1 1 160px;padding:22px 18px;text-align:center;font-size:.85rem;font-weight:600;
  color:var(--txt-2);border-left:1px solid var(--line);display:flex;align-items:center;justify-content:center;gap:9px;
}
.trust .t-item:first-child{border-left:0}
.trust .t-item i{width:9px;height:9px;border-radius:2px;display:inline-block}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;transition:.2s ease;display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:#c3ccd5}
.card .c-img{background:var(--paper-2);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:22px}
.card .c-img img{max-height:100%;object-fit:contain;transition:.3s ease}
.card:hover .c-img img{transform:scale(1.04)}
.card .c-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1}
.card .c-tag{
  font-family:var(--mono);font-size:.66rem;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--amber-deep);margin-bottom:9px;
}
.card .c-body p{font-size:.92rem;margin:10px 0 18px}
.card .c-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:16px;border-top:1px solid var(--paper-3)}
.card .c-link{font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:7px}
.card .c-link:hover{color:var(--amber-deep)}

/* spec chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 16px}
.chip{
  font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.03em;
  background:var(--paper-2);border:1px solid var(--line);border-radius:6px;padding:5px 10px;color:var(--txt-2);
}
a.chip--link{transition:border-color .15s,color .15s}
a.chip--link:hover{border-color:var(--amber-deep);color:var(--amber-deep)}

/* ---------- datasheet pages ---------- */
.ds-block{margin-top:44px}
.ds-block h2{font-size:1.2rem;margin-bottom:18px}
.ds-apps{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px 28px}
.ds-apps li{font-size:.92rem;color:var(--txt-2);padding-left:20px;position:relative}
.ds-apps li::before{content:"";position:absolute;left:0;top:9px;width:9px;height:2px;background:var(--amber)}
.ds-note{margin-top:44px;font-size:.82rem;color:var(--txt-3);border-top:1px solid var(--line);padding-top:16px}

@media print{
  .topbar,.hdr,.ftr,.wa-float,.pd-actions,.cta-band{display:none!important}
  .sec{padding:16px 0}
  body{font-size:12px}
}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split .s-img{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:36px;display:flex;align-items:center;justify-content:center;
}
.split .s-img img{max-height:420px;object-fit:contain}

.feat-list{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:16px}
.feat-list li{display:flex;gap:14px;align-items:flex-start}
.feat-list .f-ic{
  flex:0 0 30px;width:30px;height:30px;border-radius:8px;background:rgba(245,168,0,.15);
  border:1px solid rgba(245,168,0,.4);display:flex;align-items:center;justify-content:center;
}
.feat-list .f-ic svg{width:15px;height:15px;stroke:var(--amber-deep)}
.feat-list b{display:block;font-size:.97rem;margin-bottom:2px}
.feat-list span{font-size:.9rem;color:var(--txt-2)}

/* ---------- value props ---------- */
.vp{border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 28px;background:var(--paper);transition:.2s}
.vp:hover{box-shadow:var(--shadow);border-color:#c3ccd5}
.vp .v-num{font-family:var(--mono);font-size:.72rem;color:var(--amber-deep);letter-spacing:.14em;margin-bottom:16px}
.vp h3{margin-bottom:10px}
.vp p{font-size:.92rem;margin:0}

/* ---------- utility color codes (applications) ---------- */
.util-card{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--paper);
  transition:.2s;display:flex;flex-direction:column;
}
.util-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.util-card .u-bar{height:6px}
.util-card .u-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.util-card .u-code{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--txt-3);margin-bottom:10px}
.util-card h3{margin-bottom:9px}
.util-card p{font-size:.91rem;margin-bottom:16px}
.util-card .u-foot{margin-top:auto;font-size:.86rem;font-weight:600;color:var(--txt-2);display:flex;flex-direction:column;gap:6px}
.util-card .u-foot span{display:flex;align-items:center;gap:8px}
.util-card .u-foot i{width:8px;height:8px;border-radius:2px;flex:0 0 auto}

.bg-red{background:var(--red)}.bg-amber{background:var(--amber)}.bg-blue{background:var(--blue)}
.bg-green{background:var(--green)}.bg-orange{background:var(--orange)}.bg-purple{background:var(--purple)}

/* ---------- cases ---------- */
.case-card{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--paper);
  transition:.2s;display:flex;flex-direction:column;
}
.case-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.case-card .cs-img{aspect-ratio:16/10;overflow:hidden;background:var(--paper-2)}
.case-card .cs-img img{width:100%;height:100%;object-fit:cover;transition:.35s ease}
.case-card:hover .cs-img img{transform:scale(1.05)}
.case-card .cs-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1}
.case-card .cs-meta{display:flex;gap:9px;margin-bottom:12px;flex-wrap:wrap}
.pill{
  font-family:var(--mono);font-size:.64rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  padding:5px 11px;border-radius:999px;border:1px solid var(--line);color:var(--txt-2);background:var(--paper-2);
}
.pill--amber{background:rgba(245,168,0,.14);border-color:rgba(245,168,0,.4);color:var(--amber-deep)}
.case-card h3{font-size:1.08rem;margin-bottom:9px}
.case-card p{font-size:.9rem;margin-bottom:16px}
.case-card .cs-eq{margin-top:auto;padding-top:14px;border-top:1px solid var(--paper-3);font-size:.82rem;color:var(--txt-2)}
.case-card .cs-eq b{color:var(--txt);font-weight:600}

/* case article */
.case-hero-img{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);margin:40px 0}
.case-hero-img img{width:100%;max-height:520px;object-fit:cover}
.case-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0}
.case-gallery img{border-radius:var(--radius);border:1px solid var(--line);aspect-ratio:4/3;object-fit:cover;width:100%}
.case-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:30px 0}
.case-facts .cf{background:var(--paper-2);padding:18px 20px}
.case-facts .cf b{display:block;font-family:var(--mono);font-size:1.25rem;letter-spacing:-.02em}
.case-facts .cf span{font-size:.78rem;color:var(--txt-2)}

/* ---------- spec table ---------- */
.spec{width:100%;border-collapse:collapse;font-size:.9rem;margin:0}
.spec th,.spec td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec th{font-family:var(--mono);font-size:.72rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--txt-3);width:38%;background:var(--paper-2)}
.spec td{color:var(--txt-2)}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.spec-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}

/* ---------- product detail blocks ---------- */
.pd{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;padding:52px 0;border-top:1px solid var(--line);scroll-margin-top:110px}
.pd:first-of-type{border-top:0;padding-top:8px}
.pd .pd-img{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;display:flex;align-items:center;justify-content:center}
.pd .pd-img img{max-height:360px;object-fit:contain}
.pd .pd-cat{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--amber-deep);margin-bottom:10px}
.pd h3{font-size:1.5rem;margin-bottom:12px}
.pd .pd-desc{font-size:.95rem}
.pd .pd-actions{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}
.pd ul.pd-feats{margin:16px 0 0;padding:0;list-style:none;display:grid;gap:9px}
.pd ul.pd-feats li{font-size:.9rem;color:var(--txt-2);padding-left:20px;position:relative}
.pd ul.pd-feats li::before{content:"";position:absolute;left:0;top:9px;width:9px;height:2px;background:var(--amber)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink);color:#fff;border-radius:var(--radius-lg);padding:52px 56px;position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;right:-90px;bottom:-120px;width:340px;height:340px;border-radius:50%;
  border:1px solid rgba(245,168,0,.3);background:radial-gradient(circle,rgba(245,168,0,.1),transparent 65%);
}
.cta-band h2{max-width:640px}
.cta-band p{color:#aab4bf;max-width:560px;margin:14px 0 28px}
.cta-band .btn--ghost{border-color:rgba(255,255,255,.4)}

/* ---------- forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-grid .full{grid-column:1/-1}
.fld label{display:block;font-size:.82rem;font-weight:600;margin-bottom:7px;letter-spacing:.01em}
.fld label em{color:var(--red);font-style:normal}
.fld input,.fld select,.fld textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:8px;
  font-family:inherit;font-size:.94rem;color:var(--txt);background:var(--paper);transition:.15s;
}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(245,168,0,.15)}
.fld textarea{min-height:130px;resize:vertical}
.form-note{font-size:.82rem;color:var(--txt-3);margin-top:14px}
.form-ok{
  display:none;background:rgba(0,122,51,.08);border:1px solid rgba(0,122,51,.35);
  color:#0a5c2b;border-radius:8px;padding:14px 18px;font-size:.92rem;margin-top:18px;
}
.form-ok.show{display:block}

/* ---------- contact info ---------- */
.ci{display:grid;gap:0;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
.ci .row{display:flex;gap:16px;padding:20px 24px;border-bottom:1px solid var(--line);background:var(--paper)}
.ci .row:last-child{border-bottom:0}
.ci .row b{flex:0 0 120px;font-size:.8rem;font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--txt-3);padding-top:2px}
.ci .row div{font-size:.95rem;color:var(--txt-2)}
.ci .row div a:hover{color:var(--amber-deep)}

/* ---------- footer ---------- */
.ftr{background:var(--ink);color:#98a3ae;padding:64px 0 0;margin-top:0}
.ftr .f-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.ftr h4{color:#fff;font-size:.8rem;font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px;font-weight:600}
.ftr a{display:block;font-size:.9rem;padding:5px 0;color:#98a3ae}
.ftr a:hover{color:var(--amber)}
.ftr .f-brand p{font-size:.9rem;margin-top:16px;max-width:320px;color:#8d97a2}
.ftr .f-bot{border-top:1px solid var(--line-dark);padding:22px 0;font-size:.8rem;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.ftr .f-bot a{display:inline;padding:0}

/* ---------- utility ---------- */
.mt0{margin-top:0}.mt24{margin-top:24px}.mt40{margin-top:40px}.mt64{margin-top:64px}
.tc{text-align:center}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.page-hero{
  background:var(--ink);color:#fff;padding:72px 0 60px;position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 70% 100% at 20% 0%,#000 20%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 70% 100% at 20% 0%,#000 20%,transparent 75%);
}
.page-hero .wrap{position:relative;z-index:2}
.page-hero p{color:#aab4bf;max-width:640px;margin-top:16px;font-size:1.04rem}
.crumbs{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:#7b8794;margin-bottom:18px}
.crumbs a{color:#aab4bf}
.crumbs a:hover{color:var(--amber)}

/* filter tabs */
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:40px}
.tabs button{
  background:var(--paper);border:1.5px solid var(--line);border-radius:999px;
  padding:9px 20px;font-size:.88rem;font-weight:600;color:var(--txt-2);cursor:pointer;transition:.15s;
}
.tabs button:hover{border-color:var(--ink);color:var(--txt)}
.tabs button.on{background:var(--ink);border-color:var(--ink);color:#fff}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .hero .wrap{grid-template-columns:1fr;gap:44px}
  .g4{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:36px}
  .pd{grid-template-columns:1fr;gap:28px;padding:44px 0}
  .ftr .f-top{grid-template-columns:1fr 1fr}
  .case-facts{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  .nav{
    display:none;position:absolute;top:70px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;padding:14px 20px 20px;gap:2px;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);
  }
  .nav.open{display:flex}
  .nav a{padding:13px 12px;font-size:1rem}
  .nav .nav-cta{margin:10px 0 0}
  .burger{display:block}
  .g3,.g2{grid-template-columns:1fr}
  .g4{grid-template-columns:1fr}
  .sec{padding:64px 0}
  .cta-band{padding:38px 30px}
  .form-grid{grid-template-columns:1fr}
  .trust .t-item{flex:1 1 46%;border-left:0;border-top:1px solid var(--line)}
  .trust .wrap{flex-wrap:wrap}
  .hero{padding:72px 0 64px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .case-gallery{grid-template-columns:1fr}
  .ftr .f-top{grid-template-columns:1fr}
}

/* ---------- WhatsApp floating button ---------- */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:90;width:56px;height:56px;border-radius:50%;
  background:#25D366;color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 20px rgba(0,0,0,.28);transition:transform .2s ease,box-shadow .2s ease}
.wa-float:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(0,0,0,.32);color:#fff}
.wa-float svg{width:28px;height:28px;pointer-events:none}
@media (max-width:640px){.wa-float{right:14px;bottom:14px;width:50px;height:50px}}