/* ============================================
   PVC Foam Board — B2B Export Website
   Design tokens & shared styles
   ============================================ */

:root{
  --bg:#cfe7fa;
  --bg-alt:#bcdcf5;
  --bg-deep:#0d1117;
  --ink:#0f1419;
  --ink-2:#4b5563;
  --ink-3:#8b95a3;
  --line:#a8cbe6;
  --line-soft:#b9d8f0;
  --brand:#0b6bcb;
  --brand-dark:#0752a0;
  --brand-soft:#b9dcf7;
  --accent:#f59e0b;
  --radius:14px;
  --radius-lg:20px;
  --max:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-sm:0 1px 2px rgba(15,20,25,.04),0 4px 12px rgba(15,20,25,.04);
  --shadow-md:0 4px 8px rgba(15,20,25,.04),0 16px 40px -8px rgba(15,20,25,.10);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,'Noto Sans',sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--brand);color:#fff}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
ul{list-style:none}

.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- top bar ---------- */
.topbar{
  background:var(--bg-deep);color:#c9d1d9;
  font-size:13px;
}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px;gap:16px}
.topbar-left{display:flex;gap:22px;align-items:center}
.topbar a{transition:color .2s}
.topbar a:hover{color:#fff}
.topbar-item{display:inline-flex;align-items:center;gap:6px}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:100;
  background:rgba(224,242,255,.9);
  backdrop-filter:blur(16px) saturate(180%);
  border-bottom:1px solid var(--line-soft);
  transition:box-shadow .3s var(--ease);
}
header.scrolled{box-shadow:0 1px 12px rgba(15,20,25,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:32px}

.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),#3b9af0);
  display:grid;place-items:center;
  color:#fff;font-weight:800;font-size:15px;letter-spacing:-.5px;
  box-shadow:0 4px 12px rgba(11,107,203,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:16px;font-weight:700;letter-spacing:-.02em}
.brand-tag{font-size:10.5px;color:var(--ink-3);letter-spacing:.08em;text-transform:uppercase;font-weight:500}

.nav-menu{display:flex;gap:30px;align-items:center}
.nav-menu > a{font-size:14.5px;color:var(--ink-2);font-weight:450;position:relative;transition:color .2s}
.nav-menu > a::after{
  content:'';position:absolute;left:0;bottom:-5px;width:0;height:2px;
  background:var(--brand);transition:width .25s var(--ease);
}
.nav-menu > a:hover{color:var(--ink)}
.nav-menu > a:hover::after{width:100%}

.nav-actions{display:flex;align-items:center;gap:12px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:14.5px;font-weight:600;font-family:inherit;
  padding:12px 24px;border-radius:100px;border:1.5px solid transparent;
  cursor:pointer;transition:all .25s var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 2px 8px rgba(11,107,203,.24)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(11,107,203,.32)}
.btn-outline{border-color:var(--line);background:#fff;color:var(--ink)}
.btn-outline:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:13.5px}
.btn-lg{padding:15px 30px;font-size:15.5px}
.btn-wa{background:#25d366;color:#fff}
.btn-wa:hover{background:#1eb856;transform:translateY(-1px)}

.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;place-items:center}
.burger span{display:block;width:18px;height:1.8px;background:var(--ink);border-radius:2px;position:relative;transition:.3s}
.burger span::before,.burger span::after{content:'';position:absolute;left:0;width:18px;height:1.8px;background:var(--ink);border-radius:2px;transition:.3s}
.burger span::before{top:-6px}.burger span::after{top:6px}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#dcefff 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line-soft);
}
.hero::before{
  content:'';position:absolute;top:-280px;right:-180px;
  width:720px;height:720px;border-radius:50%;
  background:radial-gradient(circle,rgba(11,107,203,.14),transparent 68%);
  pointer-events:none;
}
.hero .wrap{
  display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;
  padding-top:76px;padding-bottom:80px;position:relative;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border:1px solid rgba(11,107,203,.16);
  padding:6px 14px;border-radius:100px;margin-bottom:22px;
  letter-spacing:.01em;
}
.hero h1{
  font-size:clamp(34px,4.4vw,52px);
  line-height:1.1;letter-spacing:-.032em;font-weight:750;
  margin-bottom:22px;
}
.hero h1 .hl{
  background:linear-gradient(180deg,transparent 62%,rgba(245,158,11,.32) 62%);
  padding:0 3px;
}
.hero p.lede{
  font-size:17px;color:var(--ink-2);max-width:540px;line-height:1.72;margin-bottom:32px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:40px}

.hero-facts{display:flex;gap:36px;flex-wrap:wrap;padding-top:28px;border-top:1px solid var(--line-soft)}
.fact-n{font-size:26px;font-weight:750;letter-spacing:-.03em;line-height:1.1;color:var(--ink)}
.fact-n small{font-size:15px;font-weight:600;color:var(--brand);margin-left:1px}
.fact-l{font-size:12.5px;color:var(--ink-3);margin-top:3px;letter-spacing:.01em}

/* ---------- product board visual ---------- */
.board-stage{
  position:relative;
  aspect-ratio:1/.92;
  border-radius:var(--radius-lg);
  background:linear-gradient(150deg,#eef2f7,#e2e8f0 62%,#d8dfe8);
  overflow:hidden;
  box-shadow:var(--shadow-md);
  display:grid;place-items:center;
}
.board-stack{width:78%;height:78%;position:relative;filter:drop-shadow(0 24px 32px rgba(15,20,25,.22))}
.board-label{
  position:absolute;bottom:16px;left:16px;
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);
  border-radius:10px;padding:9px 14px;
  font-size:12px;font-weight:600;color:var(--ink-2);
  box-shadow:0 2px 10px rgba(15,20,25,.10);
  line-height:1.4;
}
.board-label b{display:block;color:var(--ink);font-size:12.5px}
.board-chip{
  position:absolute;top:16px;right:16px;
  background:var(--bg-deep);color:#fff;
  font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  padding:7px 13px;border-radius:100px;
}

/* ---------- trust bar ---------- */
.trustbar{border-bottom:1px solid var(--line-soft);background:rgba(255,255,255,.5)}
.trustbar .wrap{display:flex;align-items:center;gap:44px;padding:22px 28px;flex-wrap:wrap;justify-content:space-between}
.trust-label{font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);font-weight:600}
.trust-logos{display:flex;gap:40px;align-items:center;flex-wrap:wrap;opacity:.62}
.trust-logos span{font-size:15px;font-weight:700;letter-spacing:-.02em;color:var(--ink-2)}

/* ---------- section base ---------- */
section{padding:92px 0}
section.alt{background:var(--bg-alt)}
.sec-head{max-width:680px;margin-bottom:52px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-eyebrow{
  font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--brand);margin-bottom:12px;
}
h2{
  font-size:clamp(26px,3.1vw,38px);
  letter-spacing:-.03em;line-height:1.16;font-weight:750;margin-bottom:16px;
}
.sec-head p{font-size:16.5px;color:var(--ink-2);line-height:1.7}

/* ---------- product cards ---------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.p-card{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;
  display:flex;flex-direction:column;
  transition:all .3s var(--ease);
}
.p-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#d6dbe2}
.p-visual{
  height:186px;position:relative;overflow:hidden;
  display:grid;place-items:center;
}
.p-swatch{width:64%;height:70%;border-radius:6px;position:relative}
.p-body{padding:24px 24px 26px;flex:1;display:flex;flex-direction:column}
.p-name{font-size:18.5px;font-weight:700;letter-spacing:-.02em;margin-bottom:6px}
.p-desc{font-size:14px;color:var(--ink-2);line-height:1.62;margin-bottom:16px;flex:1}
.p-specs{display:flex;flex-direction:column;gap:7px;margin-bottom:18px;padding-top:16px;border-top:1px solid var(--line-soft)}
.p-spec{display:flex;justify-content:space-between;font-size:13px;gap:12px}
.p-spec dt{color:var(--ink-3)}
.p-spec dd{color:var(--ink);font-weight:600;text-align:right}
.p-link{
  font-size:13.5px;font-weight:650;color:var(--brand);
  display:inline-flex;align-items:center;gap:5px;margin-top:auto;
  transition:gap .2s var(--ease);
}
.p-card:hover .p-link{gap:10px}

/* ---------- spec table ---------- */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-sm);
}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:680px}
thead th{
  background:var(--bg-alt);text-align:left;
  padding:15px 22px;font-size:12px;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2);
  border-bottom:1px solid var(--line);white-space:nowrap;
}
tbody td{padding:16px 22px;border-bottom:1px solid var(--line-soft);color:var(--ink-2)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fafbfc}
tbody td:first-child{color:var(--ink);font-weight:600}
td.mono{font-variant-numeric:tabular-nums}

/* ---------- applications ---------- */
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.app-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;transition:all .3s var(--ease);
}
.app-card:hover{border-color:var(--brand);box-shadow:0 8px 24px -8px rgba(11,107,203,.18);transform:translateY(-3px)}
.app-icon{
  width:44px;height:44px;border-radius:11px;background:var(--brand-soft);
  display:grid;place-items:center;margin-bottom:16px;color:var(--brand);
}
.app-card h3{font-size:15.5px;font-weight:700;margin-bottom:7px;letter-spacing:-.01em}
.app-card p{font-size:13.5px;color:var(--ink-2);line-height:1.6}

/* ---------- why us ---------- */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px 48px}
.why-item{display:flex;gap:16px;padding:22px 0;border-top:1px solid var(--line)}
.why-num{
  font-size:12px;font-weight:800;color:var(--brand);
  background:var(--brand-soft);width:30px;height:30px;border-radius:8px;
  display:grid;place-items:center;flex-shrink:0;font-variant-numeric:tabular-nums;
}
.why-item h3{font-size:16px;font-weight:700;margin-bottom:6px;letter-spacing:-.01em}
.why-item p{font-size:14px;color:var(--ink-2);line-height:1.65}

/* ---------- process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.step{padding:0 24px 0 0;position:relative}
.step::before{
  content:'';position:absolute;top:17px;left:0;right:0;height:1.5px;
  background:linear-gradient(90deg,var(--line),var(--line-soft));z-index:0;
}
.step:last-child::before{display:none}
.step-dot{
  width:34px;height:34px;border-radius:50%;background:#fff;
  border:2px solid var(--brand);color:var(--brand);
  display:grid;place-items:center;font-size:13px;font-weight:800;
  position:relative;z-index:1;margin-bottom:20px;
}
.step h3{font-size:15.5px;font-weight:700;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--ink-2);line-height:1.62}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;text-align:left;background:none;border:none;font-family:inherit;
  font-size:16px;font-weight:650;color:var(--ink);cursor:pointer;
  padding:22px 44px 22px 0;position:relative;line-height:1.5;
}
.faq-q::after{
  content:'';position:absolute;right:8px;top:50%;width:11px;height:11px;
  border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s var(--ease);
}
.faq-item.open .faq-q::after{transform:translateY(-30%) rotate(-135deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .4s var(--ease),padding .4s var(--ease);
}
.faq-a p{font-size:14.5px;color:var(--ink-2);line-height:1.72;padding-bottom:22px;max-width:700px}
.faq-item.open .faq-a{max-height:340px}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(135deg,#0d1117 0%,#12202f 100%);
  border-radius:var(--radius-lg);padding:64px 56px;
  color:#fff;position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center;
}
.cta::before{
  content:'';position:absolute;right:-140px;top:-140px;width:460px;height:460px;
  border-radius:50%;background:radial-gradient(circle,rgba(11,107,203,.34),transparent 66%);
}
.cta > *{position:relative;z-index:1}
.cta h2{color:#fff;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.66);font-size:16px;line-height:1.7;max-width:460px}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.cta-actions .btn{width:100%}

/* ---------- footer ---------- */
footer{background:var(--bg-deep);color:#8b95a3;padding:64px 0 0;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:52px}
.foot-brand .brand{margin-bottom:18px}
.foot-brand .brand-text .brand-name{color:#fff}
.foot-desc{line-height:1.75;font-size:13.5px;max-width:320px;margin-bottom:20px}
.foot-social{display:flex;gap:10px}
.foot-social a{
  width:36px;height:36px;border-radius:9px;background:rgba(255,255,255,.06);
  display:grid;place-items:center;color:#c9d1d9;transition:all .2s;
}
.foot-social a:hover{background:var(--brand);color:#fff}
footer h4{color:#fff;font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:18px}
.foot-links{display:flex;flex-direction:column;gap:11px}
.foot-links a{font-size:13.5px;transition:color .2s}
.foot-links a:hover{color:#fff}
.foot-contact{display:flex;flex-direction:column;gap:12px;font-size:13.5px;line-height:1.6}
.foot-contact div{display:flex;gap:9px;align-items:flex-start}
.foot-contact svg{flex-shrink:0;margin-top:3px;opacity:.6}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#6b7581;
}
.foot-bottom a:hover{color:#fff}

/* ---------- floating contact ---------- */
.float-contact{position:fixed;right:22px;bottom:22px;z-index:90;display:flex;flex-direction:column;gap:10px}
.float-btn{
  width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
  color:#fff;box-shadow:0 6px 20px rgba(15,20,25,.24);
  transition:all .25s var(--ease);
}
.float-btn:hover{transform:scale(1.08) translateY(-2px)}
.float-wa{background:#25d366}
.float-mail{background:var(--brand)}
.float-btn svg{width:24px;height:24px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero .wrap{grid-template-columns:1fr;gap:44px;padding-top:56px;padding-bottom:64px}
  .board-stage{max-width:440px;aspect-ratio:1/.8;margin:0 auto;width:100%}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .app-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .step:nth-child(2)::before{display:none}
  .cta{grid-template-columns:1fr;padding:44px 32px;gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:820px){
  .topbar-left span:nth-child(2){display:none}
  .nav-menu{
    position:fixed;top:110px;left:0;right:0;
    background:#fff;flex-direction:column;align-items:flex-start;
    padding:20px 28px 28px;gap:4px;
    border-bottom:1px solid var(--line);
    box-shadow:0 16px 32px -12px rgba(15,20,25,.12);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:all .28s var(--ease);
  }
  .nav-menu.open{transform:none;opacity:1;pointer-events:auto}
  .nav-menu > a{width:100%;padding:12px 0;font-size:15.5px;border-bottom:1px solid var(--line-soft)}
  .nav-menu > a::after{display:none}
  .nav-actions .btn{display:none}
  .burger{display:grid}
  .why-grid{grid-template-columns:1fr;gap:0}
  section{padding:68px 0}
  .sec-head{margin-bottom:36px}
  .trustbar .wrap{gap:20px}
  .trust-logos{gap:24px}
}
@media (max-width:600px){
  .wrap{padding:0 18px}
  .nav{height:64px}
  .nav-menu{top:102px;padding-left:18px;padding-right:18px}
  .brand-tag{display:none}
  .hero h1{font-size:30px}
  .hero p.lede{font-size:15.5px}
  .hero-actions .btn{flex:1;justify-content:center}
  .hero-facts{gap:22px}
  .product-grid{grid-template-columns:1fr}
  .app-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:0}
  .step{padding:0 0 28px}
  .step::before{display:none}
  .foot-grid{grid-template-columns:1fr;gap:32px}
  .topbar .wrap{height:34px;font-size:11.5px}
  .topbar-left{gap:14px}
  .float-contact{right:14px;bottom:14px}
  .float-btn{width:46px;height:46px}
  .cta{padding:36px 22px;border-radius:16px}
}

/* ---------- factory gallery & video ---------- */
.factory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.factory-card{position:relative;border-radius:var(--radius);overflow:hidden;background:#dfe3e8;aspect-ratio:3/3.6}
.factory-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.factory-card:hover img{transform:scale(1.05)}
.factory-cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:28px 16px 14px;font-size:12.5px;color:#e8ecf1;line-height:1.45;
  background:linear-gradient(180deg,transparent,rgba(10,14,20,.82));
}
.factory-cap b{display:block;color:#fff;font-size:13.5px;margin-bottom:2px}
.video-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px}
.video-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.video-card video{width:100%;aspect-ratio:16/9;background:#0d1117;display:block}
.video-card figcaption{padding:13px 18px;font-size:13.5px;color:var(--ink-2)}
@media (max-width:1024px){.factory-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.factory-grid{grid-template-columns:1fr}.video-row{grid-template-columns:1fr}}

/* ---------- product line titles ---------- */
.line-title{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  font-size:22px;font-weight:750;letter-spacing:-.02em;
  margin:34px 0 22px;padding-top:26px;border-top:1px solid var(--line);
}
.line-title:first-of-type{border-top:none;margin-top:8px;padding-top:0}
.line-badge{
  font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;
  color:#fff;background:var(--brand);border-radius:100px;padding:5px 12px;
  align-self:center;
}
.line-title small{font-size:13px;font-weight:500;color:var(--ink-3)}