/* ============================================================
   GUANGZHOU VINTAGE TRADING CO LTD — Landing
   Built on MAS Vintage design system. Light, flat, hairline
   borders, blue identity, one contrasting red CTA per band.
   ============================================================ */

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-sans);color:var(--ink);background:var(--canvas);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:var(--brand-tint);}
:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:var(--r-sm);}

/* accent is tweakable; defaults mirror the design system CTA */
:root{
  --accent:var(--cta);
  --accent-hover:var(--cta-hover);
  --accent-active:var(--cta-active);
  --accent-soft:var(--cta-soft);
  --pad-y:96px;            /* section vertical padding, density-tweakable */
  --container:1240px;
}

.container{max-width:var(--container);margin:0 auto;padding:0 32px;}
.eyebrow{
  font-family:var(--font-mono);font-weight:600;font-size:12px;
  letter-spacing:0.16em;text-transform:uppercase;color:var(--brand);
  display:inline-block;
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--font-sans);font-weight:600;font-size:15px;letter-spacing:-0.005em;
  line-height:1;border-radius:var(--r-sm);padding:14px 24px;border:1.5px solid transparent;
  cursor:pointer;transition:background .14s ease,border-color .14s ease,color .14s ease;white-space:nowrap;
}
.btn svg{width:17px;height:17px;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-hover);}
.btn-primary:active{background:var(--accent-active);}
.btn-secondary{background:#fff;color:var(--brand);border-color:var(--brand);}
.btn-secondary:hover{background:var(--brand-soft);}
.btn-brand{background:var(--brand);color:#fff;border-color:var(--brand);}
.btn-brand:hover{background:var(--brand-deep);border-color:var(--brand-deep);}
.btn-brand:active{background:var(--brand-ink);}
.btn-on-dark{background:#fff;color:var(--ink);border-color:#fff;}
.btn-on-dark:hover{background:var(--on-dark-2);border-color:var(--on-dark-2);}
.btn-ghost-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-ghost-dark:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn-sm{padding:10px 16px;font-size:14px;}
.btn-link{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px;cursor:pointer;}
.btn-link svg{width:16px;height:16px;color:inherit;transition:transform .14s ease;}
.btn-link:hover svg{transform:translateX(3px);}

/* ---------- section heads ---------- */
section{scroll-margin-top:118px;}
.band{padding:var(--pad-y) 0;}
.band-soft{background:var(--canvas-soft);}
.sec-head{max-width:50em;}
.sec-head h2{
  font-weight:600;font-size:clamp(30px,4vw,42px);line-height:1.08;
  letter-spacing:-0.022em;margin:14px 0 0;color:var(--ink);
}
.sec-head p{font-size:18px;line-height:1.6;color:var(--ink-2);margin:16px 0 0;}
.sec-head.center{margin:0 auto;text-align:center;}

/* ============================================================
   UTILITY BAR
   ============================================================ */
.util{background:var(--ink-section);color:var(--on-dark-2);font-size:13px;}
.util-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:40px;padding:6px 0;}
.util-left{font-family:var(--font-mono);letter-spacing:0.04em;color:var(--on-dark-2);
  text-transform:uppercase;font-size:11.5px;}
.util-left b{color:#fff;font-weight:500;}
.util-right{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.util-right a{display:inline-flex;align-items:center;gap:7px;color:var(--on-dark-2);transition:color .14s;}
.util-right a:hover{color:#fff;}
.util-right svg{width:14px;height:14px;color:var(--brand);}

/* ============================================================
   NAV
   ============================================================ */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,0.92);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px;}
.brand{display:flex;align-items:center;gap:13px;flex:none;}
.brand img{height:42px;width:auto;}
.brand-text{display:flex;flex-direction:column;line-height:1;}
.brand-text .b-name{font-weight:700;font-size:19px;letter-spacing:0.02em;color:var(--brand);}
.brand-text .b-sub{font-family:var(--font-mono);font-size:9.5px;letter-spacing:0.18em;
  text-transform:uppercase;color:var(--ink-3);margin-top:4px;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{font-size:15.5px;font-weight:500;color:var(--ink-2);transition:color .14s;position:relative;}
.nav-links a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1px;}
.nav-links a.active{color:var(--ink);}
.nav-right{display:flex;align-items:center;gap:14px;flex:none;}
.nav-burger{display:none;background:none;border:1px solid var(--line-strong);border-radius:var(--r-sm);
  cursor:pointer;color:var(--ink);padding:8px;}
.nav-burger svg{width:22px;height:22px;display:block;}
.mobile-menu{display:none;border-bottom:1px solid var(--line);background:#fff;padding:10px 0;}
.mobile-menu a{display:block;padding:12px 32px;font-size:16px;font-weight:500;color:var(--ink-2);}
.mobile-menu a:hover{background:var(--canvas-soft);}
.mobile-menu .btn{margin:12px 32px 6px;}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;overflow:hidden;background:var(--ink-section);}
.hero-bg{position:absolute;inset:0;z-index:0;}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s ease;}
.hero-slide.active{opacity:1;}
.hero-slide img{width:100%;height:100%;object-fit:cover;filter:saturate(.82) brightness(.92);}
.hero-scrim{position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(10,15,19,.86) 0%,rgba(10,15,19,.62) 42%,rgba(10,15,19,.20) 100%);}
.hero-inner{position:relative;z-index:2;padding:104px 0 120px;min-height:600px;
  display:flex;flex-direction:column;justify-content:center;}
.hero-inner{position:relative;}
.hero .eyebrow{color:#7fc4e8;}
.hero-taglines{margin:22px 0 0;max-width:17em;}
/* single tagline (slider mode) */
.hero-tagline-single{
  font-weight:600;font-size:clamp(38px,5.4vw,68px);line-height:1.02;letter-spacing:-0.028em;
  color:#fff;min-height:1.1em;
}
.hero-tagline-single .ln{display:none;}
.hero-tagline-single .ln.active{display:block;animation:rise .6s ease both;}
@keyframes rise{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}
/* list (static mode) */
.hero-tagline-list{display:none;}
.hero-tagline-list li{
  font-weight:600;font-size:clamp(30px,4.2vw,52px);line-height:1.1;letter-spacing:-0.025em;color:#fff;
  display:flex;align-items:baseline;gap:18px;padding:6px 0;
}
.hero-tagline-list li .n{font-family:var(--font-mono);font-size:15px;color:#7fc4e8;
  font-weight:600;letter-spacing:.05em;flex:none;width:1.5em;}
.hero-actions{display:flex;gap:14px;margin-top:40px;flex-wrap:wrap;}
.hero-meta{display:flex;gap:38px;margin-top:48px;}
.hero-meta .m{display:flex;flex-direction:column;}
.hero-meta .m-num{font-weight:600;font-size:26px;letter-spacing:-0.02em;color:#fff;
  font-variant-numeric:tabular-nums;}
.hero-meta .m-num b{color:#7fc4e8;font-weight:600;}
.hero-meta .m-l{font-size:12.5px;color:var(--on-dark-2);margin-top:5px;}
/* controls */
.hero-controls{z-index:3;}
.hero-arrows{position:absolute;right:0;bottom:26px;display:flex;gap:10px;}
.hero-arrow{width:48px;height:48px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.4);
  background:rgba(255,255,255,.06);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:background .14s,border-color .14s;}
.hero-arrow:hover{background:rgba(255,255,255,.16);border-color:#fff;}
.hero-arrow svg{width:20px;height:20px;}
.hero-dots{position:absolute;left:0;right:0;bottom:30px;display:flex;gap:11px;justify-content:center;}
.hero-dot{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.38);border:none;
  cursor:pointer;padding:0;transition:background .2s,transform .2s;}
.hero-dot:hover{background:rgba(255,255,255,.6);}
.hero-dot.active{background:var(--brand);transform:scale(1.15);}
/* static-mode toggles */
.hero[data-mode="static"] .hero-tagline-single{display:none;}
.hero[data-mode="static"] .hero-tagline-list{display:block;}
.hero[data-mode="static"] .hero-arrows,
.hero[data-mode="static"] .hero-dots{display:none;}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center;}
.about-copy h2{font-weight:600;font-size:clamp(28px,3.4vw,40px);line-height:1.1;
  letter-spacing:-0.022em;margin:14px 0 0;}
.about-copy p{font-size:18px;line-height:1.65;color:var(--ink-2);margin:20px 0 0;}
.about-facts{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;margin-top:30px;}
.about-facts .f{background:#fff;padding:18px 20px;}
.about-facts .f .v{font-weight:600;font-size:22px;letter-spacing:-0.02em;color:var(--brand);
  font-variant-numeric:tabular-nums;}
.about-facts .f .k{font-size:12.5px;color:var(--ink-3);margin-top:4px;}
.about-media{position:relative;border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);}
.about-media img{width:100%;height:480px;object-fit:cover;filter:saturate(.86);}
.about-media .cap{position:absolute;left:16px;bottom:14px;font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:#fff;
  background:rgba(17,23,28,.62);padding:6px 11px;border-radius:var(--r-sm);backdrop-filter:blur(4px);}

/* ============================================================
   PRODUCTS
   ============================================================ */
.prod-top{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:38px;}
.prod-arrows{display:flex;gap:10px;}
.prod-arrow{width:46px;height:46px;border-radius:var(--r-sm);border:1px solid var(--line-strong);
  background:#fff;color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:border-color .14s,background .14s;}
.prod-arrow:hover{border-color:var(--ink-3);}
.prod-arrow:disabled{opacity:.35;cursor:default;}
.prod-arrow svg{width:20px;height:20px;}
.prod-scroll{display:flex;gap:20px;overflow-x:auto;scroll-behavior:smooth;padding:4px 0 16px;
  scrollbar-width:none;-webkit-overflow-scrolling:touch;}
.prod-scroll::-webkit-scrollbar{display:none;}
.pcard{flex:0 0 300px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;display:flex;flex-direction:column;transition:border-color .14s;}
.pcard:hover{border-color:var(--line-strong);}
.pcard .media{position:relative;height:200px;overflow:hidden;}
.pcard .media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease;}
.pcard:hover .media img{transform:scale(1.04);}
/* flat granule swatches — material-coded */
.swatch{position:absolute;inset:0;}
.swatch::after{content:"";position:absolute;inset:0;opacity:.5;
  background-image:radial-gradient(currentColor 1.4px,transparent 1.5px);
  background-size:11px 11px;background-position:0 0;mix-blend-mode:multiply;}
.swatch.s-abs{background:#3a4046;color:#1c2024;}
.swatch.s-tio2{background:#eef1f3;color:#c6ccd1;}
.swatch.s-resin{background:#d39a52;color:#9c6a2c;}
.swatch.s-tdi{background:#e7dca6;color:#c3b06a;}
.swatch.s-polyol{background:#dfeaf0;color:#a9c4d4;}
.swatch.s-xanthan{background:#e8dcc4;color:#c4b48d;}
.swatch.s-acrylic{background:#c8e4f8;color:#88c0e8;}
.swatch.s-aliph{background:#e8c870;color:#c09840;}
.swatch.s-apg{background:#c8e4c0;color:#88b880;}
.swatch.s-antox{background:#e07840;color:#b84818;}
.swatch.s-cab{background:#f0e8cc;color:#d4c894;}
.swatch.s-van{background:#4a2410;color:#2a1008;}
.swatch.s-hmda{background:#dce8a8;color:#b0c868;}
.swatch.s-msg{background:#f8f4e4;color:#dcd498;}
.swatch.s-sio2{background:#d8dce4;color:#a0a8b8;}
.swatch.s-dcca{background:#a0d4f0;color:#5090c8;}
.swatch.s-gel{background:#e4c498;color:#b89460;}
.swatch.s-adip{background:#f4f0e4;color:#d0caa8;}
.pcard .media .code{position:absolute;left:14px;top:13px;font-family:var(--font-mono);font-size:10.5px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--ink);background:rgba(255,255,255,.85);
  padding:5px 9px;border-radius:var(--r-xs);}
.pcard .media .form{position:absolute;right:14px;bottom:13px;font-family:var(--font-mono);font-size:10px;
  letter-spacing:.06em;text-transform:uppercase;color:#fff;background:rgba(17,23,28,.5);
  padding:4px 8px;border-radius:var(--r-xs);backdrop-filter:blur(3px);}
.pcard .body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1;}
.pcard h3{font-weight:600;font-size:21px;letter-spacing:-0.012em;margin:0;}
.pcard .desc{font-size:13.5px;line-height:1.5;color:var(--ink-3);margin:7px 0 18px;flex:1;}
.pcard .foot{display:flex;align-items:center;justify-content:space-between;}
.pcard .grade{font-family:var(--font-mono);font-size:11.5px;color:var(--ink-3);}

/* ============================================================
   WHY CHOOSE US (dark band)
   ============================================================ */
.why{background:var(--ink-section);color:#fff;}
.why .eyebrow{color:#7fc4e8;}
.why .sec-head h2{color:#fff;}
.why .sec-head p{color:var(--on-dark-2);}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:54px;
  border-top:1px solid var(--line-dark);}
.why-cell{padding:34px 26px 30px;border-right:1px solid var(--line-dark);position:relative;}
.why-cell:last-child{border-right:none;}
.why-ico{width:56px;height:56px;border-radius:var(--r-md);background:rgba(127,196,232,.12);
  display:flex;align-items:center;justify-content:center;color:#7fc4e8;margin-bottom:24px;}
.why-ico svg{width:30px;height:30px;}
.why-num{font-weight:600;font-size:clamp(38px,4.4vw,54px);letter-spacing:-0.03em;line-height:1;
  font-variant-numeric:tabular-nums;}
.why-num b{color:#7fc4e8;font-weight:600;}
.why-lbl{font-size:14.5px;color:var(--on-dark-2);margin-top:12px;line-height:1.45;max-width:13em;}

/* ============================================================
   BRANDS
   ============================================================ */
.brand-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;margin-top:46px;}
.brand-cell{background:#fff;height:128px;display:flex;align-items:center;justify-content:center;
  transition:background .16s;}
.brand-cell:hover{background:var(--brand-soft);}
.brand-cell .wm{font-weight:700;font-size:23px;letter-spacing:-0.01em;color:#9aa1a7;
  transition:color .16s;text-align:center;line-height:1.05;filter:grayscale(1);}
.brand-cell:hover .wm{color:var(--brand);}
.brand-cell .wm small{display:block;font-family:var(--font-mono);font-size:9px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:inherit;opacity:.7;margin-top:5px;}

/* ============================================================
   CERTIFICATES
   ============================================================ */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:46px;}
.cert-card{border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:#fff;display:flex;flex-direction:column;transition:border-color .14s;}
.cert-card:hover{border-color:var(--brand);}
.cert-preview{position:relative;height:240px;background:var(--canvas-muted);overflow:hidden;
  border-bottom:1px solid var(--line);display:block;}
.cert-preview img{width:100%;height:100%;object-fit:cover;object-position:center top;transition:transform .4s ease;}
.cert-card:hover .cert-preview img{transform:scale(1.03);}
.cert-preview .zoom{position:absolute;right:12px;top:12px;width:34px;height:34px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;color:var(--ink);
  opacity:0;transition:opacity .14s;}
.cert-card:hover .cert-preview .zoom{opacity:1;}
.cert-preview .zoom svg{width:17px;height:17px;}
.pdf-badge{display:inline-flex;align-items:center;gap:5px;flex:none;
  font-family:var(--font-mono);font-weight:700;font-size:11px;letter-spacing:.08em;color:#fff;
  background:var(--cta);padding:5px 9px 4px;border-radius:var(--r-xs);line-height:1;}
.pdf-badge::before{content:"";width:11px;height:13px;flex:none;
  background:#fff;-webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'/><path d='M14 2v6h6'/></svg>") center/contain no-repeat;
          mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'/><path d='M14 2v6h6'/></svg>") center/contain no-repeat;}
.cert-card .cb{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;background:#fff;}
.cert-card .cb .t{display:block;font-weight:600;font-size:15px;}
.cert-card .cb .s{display:block;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ink-3);margin-top:3px;}
.cert-card .cb svg{width:18px;height:18px;color:var(--brand);}

/* ============================================================
   NEWS
   ============================================================ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:46px;}
.ncard{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  display:flex;flex-direction:column;transition:border-color .14s;cursor:pointer;}
.ncard:hover{border-color:var(--line-strong);}
.ncard .nmedia{height:220px;overflow:hidden;}
.ncard .nmedia img{width:100%;height:100%;object-fit:cover;filter:saturate(.9);transition:transform .4s ease;}
.ncard:hover .nmedia img{transform:scale(1.04);}
.ncard .nbody{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.ncard .ndate{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--brand);display:flex;align-items:center;gap:7px;}
.ncard .ndate svg{width:14px;height:14px;}
.ncard h3{font-weight:600;font-size:20px;letter-spacing:-0.012em;margin:13px 0 0;line-height:1.2;}
.ncard p{font-size:14px;line-height:1.55;color:var(--ink-2);margin:11px 0 16px;flex:1;}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:stretch;}
.contact-media{position:relative;border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);min-height:440px;}
.contact-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.86);}
.contact-media .info{position:absolute;left:0;right:0;bottom:0;padding:26px;
  background:linear-gradient(0deg,rgba(10,15,19,.9),rgba(10,15,19,0));}
.contact-media .info .row{display:flex;align-items:flex-start;gap:11px;color:#fff;font-size:13.5px;
  line-height:1.5;padding:5px 0;}
.contact-media .info .row svg{width:16px;height:16px;color:#7fc4e8;flex:none;margin-top:2px;}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);padding:34px;
  display:flex;flex-direction:column;}
.form-card h3{font-weight:600;font-size:24px;letter-spacing:-0.015em;margin:0;}
.form-card .sub{font-size:14.5px;color:var(--ink-2);margin:10px 0 24px;line-height:1.5;}
.fld{margin-bottom:18px;}
.fld label{display:block;font-size:15px;font-weight:600;margin-bottom:9px;color:var(--ink);}
.fld input,.fld textarea{width:100%;font-family:var(--font-sans);font-size:15px;color:var(--ink);
  background:#fff;border:1px solid var(--line-strong);border-radius:var(--r-md);padding:13px 14px;
  transition:border-color .14s,box-shadow .14s;}
.fld input::placeholder{color:var(--ink-4);}
.fld input:focus,.fld textarea:focus{outline:none;border-color:var(--brand);box-shadow:var(--focus-ring);}
.form-card .btn{margin-top:6px;width:100%;}
.form-note{font-size:12px;color:var(--ink-3);margin-top:14px;text-align:center;}
.form-success{display:none;flex-direction:column;align-items:center;text-align:center;padding:46px 20px;margin:auto;}
.form-success.show{display:flex;}
.form-success .ico{width:58px;height:58px;border-radius:50%;background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px;}
.form-success .ico svg{width:30px;height:30px;}
.form-success h3{margin:0 0 8px;}
.form-success p{font-size:14.5px;color:var(--ink-2);margin:0;}

/* ============================================================
   GET IN TOUCH
   ============================================================ */
.touch{text-align:center;}
.touch .sec-head{margin:0 auto;}
.touch-actions{display:flex;gap:14px;justify-content:center;margin-top:30px;flex-wrap:wrap;}
.touch-legal{font-size:14.5px;color:var(--ink-3);margin-top:26px;}
.touch-legal a{color:var(--brand);font-weight:500;text-decoration:underline;text-underline-offset:3px;
  text-decoration-color:var(--line-strong);}
.touch-legal a:hover{text-decoration-color:var(--brand);}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--ink-section);color:var(--on-dark-2);padding:72px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.3fr;gap:44px;}
.footer-brand .fb-logo{display:flex;align-items:center;gap:12px;margin-bottom:20px;}
.footer-brand .fb-logo img{height:40px;}
.footer-brand .fb-logo .b-name{font-weight:700;font-size:18px;letter-spacing:.02em;color:#fff;}
.footer-brand .fb-logo .b-sub{font-family:var(--font-mono);font-size:9px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--on-dark-3);margin-top:3px;}
.footer-brand p{font-size:14px;line-height:1.6;max-width:24em;color:var(--on-dark-2);}
.footer h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--on-dark-3);margin:0 0 18px;font-weight:600;}
.footer .fcontact .row{display:flex;align-items:flex-start;gap:11px;font-size:13.5px;line-height:1.55;
  padding:7px 0;color:var(--on-dark-2);}
.footer .fcontact .row svg{width:16px;height:16px;color:#7fc4e8;flex:none;margin-top:2px;}
.footer .fcontact a:hover{color:#fff;}
.footer-wechat{display:flex;gap:18px;align-items:flex-start;}
.qr{width:108px;height:108px;flex:none;background:#fff;border-radius:var(--r-md);padding:8px;}
.qr svg{width:100%;height:100%;display:block;}
.footer-wechat .qr-cap{font-size:13px;line-height:1.5;color:var(--on-dark-2);}
.footer-wechat .qr-cap b{color:#fff;font-weight:600;display:block;margin-bottom:4px;}
.socials{display:flex;gap:11px;margin-top:22px;flex-wrap:wrap;}
.social{width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line-dark);
  display:flex;align-items:center;justify-content:center;color:var(--on-dark-2);
  transition:background .14s,color .14s,border-color .14s;cursor:pointer;}
.social:hover{background:var(--brand);border-color:var(--brand);color:#fff;}
.social svg{width:19px;height:19px;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
  margin-top:54px;padding-top:26px;border-top:1px solid var(--line-dark);font-size:12.5px;color:var(--on-dark-3);}
.footer-bottom .mono{letter-spacing:.04em;}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ---- 1080px: laptop / wide tablet landscape ---- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-wechat-wrap{grid-column:1/-1;}
  .why-grid{grid-template-columns:1fr 1fr;}
  .why-cell:nth-child(2){border-right:none;}
  .why-cell:nth-child(1),.why-cell:nth-child(2){border-bottom:1px solid var(--line-dark);}
}

/* ---- 900px: tablet landscape ---- */
@media (max-width:900px){
  .util-left{display:none;}
  .util-inner{justify-content:center;}
  .nav-links{display:none;}
  .nav-right .btn{display:none;}
  .nav-burger{display:flex;}
  .about-grid{grid-template-columns:1fr;gap:36px;}
  .about-media img{height:340px;}
  .contact-grid{grid-template-columns:1fr;gap:36px;}
  .contact-media{min-height:320px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cert-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr;gap:36px;}
  .footer-wechat-wrap{grid-column:auto;}
  .sec-head p{font-size:16px;}
}

/* ---- 768px: tablet portrait ---- */
@media (max-width:768px){
  .brand-grid{grid-template-columns:repeat(2,1fr);}
  .hero-scrim{
    background:linear-gradient(180deg,rgba(10,15,19,.45) 0%,rgba(10,15,19,.72) 55%,rgba(10,15,19,.94) 100%);
  }
  .prod-top{flex-direction:column;align-items:flex-start;gap:16px;}
}

/* ---- 640px: large phone / landscape ---- */
@media (max-width:640px){
  :root{--pad-y:64px;}
  .container{padding:0 18px;}
  .hero-inner{padding:72px 0 110px;min-height:500px;}
  .hero-tagline-single{font-size:clamp(28px,8.5vw,48px);}
  .hero-meta{gap:20px;flex-wrap:wrap;}
  .hero-arrows{bottom:18px;}
  .hero-dots{bottom:26px;}
  .about-facts{grid-template-columns:1fr;}
  .why-grid{grid-template-columns:1fr;}
  .why-cell{border-right:none;border-bottom:1px solid var(--line-dark);}
  .why-cell:last-child{border-bottom:none;}
  .news-grid{grid-template-columns:1fr;}
  .cert-grid{grid-template-columns:1fr;}
  .prod-arrows{display:none;}
  .sec-head p{font-size:15px;}
}

/* ---- 480px: phone portrait ---- */
@media (max-width:480px){
  .container{padding:0 16px;}
  .brand-cell{height:100px;}
  .brand-cell .wm{font-size:18px;}
  .pcard{flex:0 0 272px;}
  .pcard .media{height:178px;}
  .form-card{padding:22px 20px;}
  .hero-inner{min-height:460px;}
  .footer-bottom{flex-direction:column;text-align:center;gap:8px;}
  .touch-actions{flex-direction:column;align-items:center;}
  .touch-actions .btn{width:100%;max-width:340px;}
}

/* density tweak */
body.density-compact{--pad-y:64px;}
body.density-comfy{--pad-y:120px;}