/* ============ Chuang Hong Foam — ploylink-inspired ============ */
:root{
  --theme:rgb(100,181,246);
  --theme-dark:#3d9be0;
  --theme-darker:#1f78c2;
  --navy:#0e2742;
  --navy-2:#0a1d33;
  --ink:#1d2b3a;
  --muted:#5e708a;
  --bg:#ffffff;
  --bg-soft:#f4f9fe;
  --line:#e4eef8;
  --radius:16px;
  --shadow-sm:0 6px 18px rgba(14,39,66,.07);
  --shadow:0 18px 48px rgba(14,39,66,.12);
  --header-h:78px;
  --container:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:hidden;overflow-x:clip}
body{
  font-family:'Inter',system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;width:100%;
  overflow-x:hidden;overflow-x:clip; /* hard-stop any horizontal scroll (mobile fit) */
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
h1,h2,h3,h4,h5{font-family:'Poppins',sans-serif;line-height:1.2;color:var(--navy)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-soft{background:var(--bg-soft)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:'Poppins',sans-serif;font-weight:600;font-size:15px;
  padding:13px 26px;border-radius:50px;cursor:pointer;border:1.5px solid transparent;
  transition:.3s;text-align:center}
.btn-primary{background:var(--theme);color:#fff;box-shadow:0 10px 24px rgba(100,181,246,.4)}
.btn-primary:hover{background:var(--theme-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(30,136,229,.45)}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.75)}
.btn-outline:hover{background:#fff;color:var(--navy);border-color:#fff}
.btn-lg{padding:15px 34px;font-size:16px}
.btn-block{width:100%}

/* ---------- Topbar ---------- */
.topbar{background:var(--navy);color:#cfe2f5;font-size:13.5px;overflow:hidden}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:42px;gap:12px;flex-wrap:wrap}
.topbar a{color:#cfe2f5}
.topbar a:hover{color:#fff}
.topbar .dot{opacity:.5;margin:0 4px}
.topbar-right{opacity:.9}

/* ---------- Header ---------- */
.site-header{position:fixed;top:42px;left:0;right:0;z-index:100;height:var(--header-h);
  display:flex;align-items:center;transition:background .3s ease,box-shadow .3s ease,top .3s ease}
.site-header.scrolled{background:#fff;box-shadow:0 6px 24px rgba(14,39,66,.08);top:0}
.header-inner{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:flex;align-items:center;gap:12px;color:#fff}
.site-header.scrolled .brand{color:var(--navy)}
.brand-logo{height:42px;width:auto;display:block}
.site-header.scrolled .brand-logo{filter:invert(1) grayscale(1) brightness(.25)}
.brand-name{font-family:'Poppins',sans-serif;font-weight:700;font-size:19px;letter-spacing:.5px;line-height:1}
.brand-sub{display:block;font-family:'Inter',sans-serif;font-weight:500;font-size:11px;letter-spacing:1.5px;text-transform:uppercase;opacity:.8;margin-top:3px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:#eaf3fb;font-weight:500;font-size:15px;position:relative;transition:color .25s}
.site-header.scrolled .nav a{color:var(--ink)}
.nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;
  background:var(--theme);transition:width .25s}
.nav a:not(.nav-cta):hover::after{width:100%}
.nav a:hover{color:var(--theme)}
.site-header.scrolled .nav a:hover{color:var(--theme-dark)}
.nav-cta{padding:9px 20px;font-size:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:26px;height:3px;background:#fff;border-radius:3px;transition:.3s}
.site-header.scrolled .nav-toggle span{background:var(--navy)}

/* ---------- Hero ---------- */
.hero{position:relative;height:100vh;min-height:640px;overflow:hidden;display:flex;align-items:center}
.slides{position:absolute;inset:0}
.slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;
  transform:scale(1.08);transition:opacity 1.2s ease,transform 6s ease}
.slide.active{opacity:1;transform:scale(1)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(8,24,44,.55) 0%,rgba(8,24,44,.35) 55%,rgba(8,24,44,.6) 100%)}
.hero-content{position:relative;z-index:2;color:#fff;text-align:center}
.hero-content h1{color:#fff;font-size:clamp(36px,5.5vw,68px);font-weight:800;margin-bottom:20px;text-shadow:0 6px 30px rgba(0,0,0,.4)}
.hero-slogan{font-family:'Inter',sans-serif;font-size:15px;font-weight:500;letter-spacing:4px;
  text-transform:uppercase;color:rgba(255,255,255,.88);margin-bottom:34px;text-shadow:0 2px 12px rgba(0,0,0,.45)}
.hero-slogan::before,.hero-slogan::after{content:"";display:inline-block;width:44px;height:1px;
  background:rgba(255,255,255,.55);vertical-align:middle;margin:0 18px}
.hero-dots{position:absolute;bottom:92px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:3}
.hero-dots .dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.45);cursor:pointer;transition:.3s}
.hero-dots .dot.active{background:var(--theme);width:28px;border-radius:6px}
.scroll-down{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;
  width:26px;height:42px;border:2px solid rgba(255,255,255,.6);border-radius:14px;display:flex;justify-content:center;padding-top:7px}
.scroll-down span{width:4px;height:8px;border-radius:3px;background:#fff;animation:scrolldot 1.6s infinite}
@keyframes scrolldot{0%{opacity:0;transform:translateY(-4px)}50%{opacity:1}100%{opacity:0;transform:translateY(10px)}}

/* ---------- Stats ---------- */
.stats{background:linear-gradient(120deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff;padding:64px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat b{font-family:'Poppins',sans-serif;font-size:clamp(34px,4vw,52px);font-weight:800;color:#fff}
.stat span{font-family:'Poppins',sans-serif;font-size:30px;font-weight:700;color:var(--theme);margin-left:2px}
.stat p{color:#bcd2ea;font-size:14.5px;margin-top:6px}

/* ---------- Section head ---------- */
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-head.left{text-align:left;margin-left:0}
.section-tag{display:inline-block;background:rgba(100,181,246,.14);color:var(--theme-darker);
  font-size:12px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;padding:6px 14px;border-radius:50px;margin-bottom:14px}
.section-head h2{font-size:clamp(26px,3.4vw,40px);font-weight:700;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16.5px}

/* ---------- Product category blocks ---------- */
.pcat{display:grid;grid-template-columns:1fr 1.1fr;gap:54px;align-items:center;
  padding:48px 0;border-bottom:1px solid var(--line)}
.pcat:last-child{border-bottom:0}
.pcat-rev .pcat-text{order:2}
.pcat-no{font-family:'Poppins',sans-serif;font-size:60px;font-weight:800;color:rgba(100,181,246,.18);line-height:1;display:block;margin-bottom:6px}
.pcat-text h3{font-size:28px;font-weight:700;margin-bottom:14px}
.pcat-text p{color:var(--muted);margin-bottom:18px}
.pcat-list{list-style:none;display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.pcat-list li{background:var(--bg-soft);border:1px solid var(--line);color:var(--ink);
  font-size:13.5px;font-weight:500;padding:7px 14px;border-radius:50px}
.pcat-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pcat-grid img{border-radius:14px;aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow-sm);transition:transform .4s,box-shadow .4s}
.pcat-grid img:hover{transform:translateY(-4px);box-shadow:var(--shadow)}

/* ---------- Advantages ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 26px;
  box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s,border-color .3s}
.adv-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(100,181,246,.5)}
.adv-ico{width:60px;height:60px;border-radius:16px;background:linear-gradient(135deg,var(--theme),var(--theme-dark));
  display:grid;place-items:center;font-size:28px;margin-bottom:18px;box-shadow:0 10px 22px rgba(100,181,246,.4)}
.adv-card h4{font-size:18px;margin-bottom:10px}
.adv-card p{color:var(--muted);font-size:14.5px}

/* ---------- Factory ---------- */
.factory-block{margin-bottom:48px}
.factory-title{font-size:22px;margin-bottom:20px;color:var(--navy)}
.factory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.factory-grid img{border-radius:14px;aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow-sm);transition:transform .4s,box-shadow .4s}
.factory-grid img:hover{transform:translateY(-4px);box-shadow:var(--shadow)}

/* ---------- Certifications ---------- */
.cert-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 22px;
  text-align:center;box-shadow:var(--shadow-sm);transition:.3s}
.cert-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.cert-badge{width:64px;height:64px;margin:0 auto 16px;border-radius:50%;
  background:linear-gradient(135deg,var(--theme),var(--theme-dark));color:#fff;display:grid;place-items:center;
  font-family:'Poppins',sans-serif;font-weight:800;font-size:20px;box-shadow:0 10px 22px rgba(100,181,246,.45)}
.cert-card h4{font-size:18px;margin-bottom:8px}
.cert-card p{color:var(--muted);font-size:13.5px}
.cert-card a{color:var(--theme-darker);font-weight:600}

/* ---------- Gallery ---------- */
.gallery-filters{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:34px}
.filter-btn{background:#fff;border:1.5px solid var(--line);color:var(--muted);padding:9px 22px;
  border-radius:50px;font-weight:600;font-size:14px;cursor:pointer;transition:.25s;font-family:'Inter',sans-serif}
.filter-btn:hover{border-color:var(--theme);color:var(--theme-darker)}
.filter-btn.active{background:var(--theme);border-color:var(--theme);color:#fff}
.gallery-grid{column-count:4;column-gap:16px}
.g-item{width:100%;border-radius:14px;margin-bottom:16px;break-inside:avoid;box-shadow:var(--shadow-sm);
  cursor:pointer;transition:transform .4s,box-shadow .4s}
.g-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.about-media{position:relative}
.about-media>img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%}
.about-media-small{position:absolute;right:-22px;bottom:-26px;width:42%;border:6px solid #fff;
  border-radius:14px;box-shadow:var(--shadow)}
.about-text h2{font-size:clamp(24px,3vw,34px);margin:10px 0 16px}
.about-text p{color:var(--muted);margin-bottom:14px}
.about-points{list-style:none;margin:18px 0 26px;display:grid;gap:10px}
.about-points li{color:var(--ink);font-weight:500}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:40px}
.contact-form{background:#fff;border-radius:var(--radius);padding:34px;box-shadow:var(--shadow);border:1px solid var(--line);margin-top:24px}
.field{margin-bottom:14px}
.field input,.field textarea{width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:12px;
  font-family:'Inter',sans-serif;font-size:15px;color:var(--ink);background:#fbfdff;transition:.25s;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--theme);background:#fff;box-shadow:0 0 0 4px rgba(100,181,246,.15)}
.form-note{font-size:13px;color:var(--muted);margin-top:12px;text-align:center}
.contact-info{background:var(--navy);color:#dce9f6;border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.contact-info h3{color:#fff;font-size:22px;margin-bottom:18px}
.info-list{list-style:none;display:grid;gap:14px}
.info-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px}
.info-list span{font-size:18px}
.info-list a{color:var(--theme)}
.info-map{margin-top:22px;border-radius:12px;overflow:hidden}
.info-map img{width:100%}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-2);color:#b9cfe6;padding:60px 0 0}
.footer-logo{height:46px;width:auto;margin-bottom:16px;display:block}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;padding-bottom:42px}
.footer-brand h4{color:#fff;font-size:20px;letter-spacing:1px;margin-bottom:10px}
.footer-brand p{font-size:14px;color:#9fb8d2;max-width:280px}
.footer-col h5{color:#fff;font-size:15px;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:16px}
.footer-col a{display:block;color:#b9cfe6;font-size:14.5px;padding:6px 0;transition:.2s}
.footer-col a:hover{color:var(--theme);padding-left:5px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;font-size:13.5px;color:#8aa6c4}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.footer-bottom a{color:var(--theme);font-weight:600;text-decoration:none}
.footer-bottom a:hover{text-decoration:underline}

/* ---------- Lightbox ---------- */
.lightbox{position:fixed;inset:0;background:rgba(8,20,38,.92);display:none;align-items:center;justify-content:center;z-index:200;padding:30px}
.lightbox.open{display:flex}
.lightbox img{max-width:92%;max-height:88%;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.6)}
.lightbox-close{position:absolute;top:22px;right:28px;background:none;border:0;color:#fff;font-size:42px;cursor:pointer;line-height:1;opacity:.85}
.lightbox-close:hover{opacity:1}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .pcat{grid-template-columns:1fr;gap:28px}
  .pcat-rev .pcat-text{order:0}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .cert-grid{grid-template-columns:repeat(3,1fr)}
  .gallery-grid{column-count:3}
  .factory-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  :root{--header-h:68px}
  .nav{position:fixed;top:var(--header-h);right:0;height:calc(100vh - var(--header-h));width:78%;max-width:320px;
    background:#fff;flex-direction:column;align-items:flex-start;gap:4px;padding:24px 26px;
    transform:translateX(100%);transition:transform .35s ease;box-shadow:-10px 0 40px rgba(0,0,0,.15);overflow-y:auto}
  .site-header.scrolled .nav{top:var(--header-h)}
  .nav.open{transform:translateX(0)}
  .nav a{color:var(--ink)!important;font-size:17px;padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .nav-cta{margin-top:14px;width:100%;justify-content:center}
  .nav-toggle{display:flex}
  .nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 16px}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .about-media-small{position:static;width:70%!important;margin:16px auto 0;border:5px solid #fff!important}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .section{padding:64px 0}
  .topbar-right{display:none}
  .topbar-inner{justify-content:center;height:auto;padding:7px 0}
  .topbar-left{display:flex;align-items:center;gap:8px;font-size:11.5px;white-space:nowrap}
  .topbar-left .dot{margin:0}
  .hero{height:auto;min-height:0;padding:150px 0 110px}
  .hero-content h1{margin-bottom:16px}
  .hero-slogan{font-size:11.5px;letter-spacing:2px;margin-bottom:26px}
  .hero-slogan::before,.hero-slogan::after{width:22px;margin:0 10px}
  .scroll-down{display:none}
  .hero-dots{bottom:34px}
  .pcat-grid{grid-template-columns:1fr 1fr}
  .adv-grid{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .gallery-grid{column-count:2}
  .factory-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .brand-logo{height:36px}
  .brand-name{font-size:16px}
  .brand-sub{font-size:9px;letter-spacing:1px}
}
@media (max-width:380px){
  .gallery-grid{column-count:1}
  .footer-grid{grid-template-columns:1fr}
  .topbar-left .loc,.topbar-left .dot{display:none}
  .brand-sub{display:none}
}