/* =========================================================
   IKS PVD — Foreign-trade lead-gen site
   Design system: industrial steel-blue, clean, premium
   ========================================================= */
:root{
  --navy:#0f2647;        /* deep brand blue */
  --navy-2:#173963;
  --blue:#2f7bd6;        /* accent */
  --blue-d:#1f5fab;
  --steel:#5b6b82;
  --ink:#15233b;         /* main text */
  --muted:#64748b;       /* secondary text */
  --line:#e4e9f0;        /* borders */
  --bg:#ffffff;
  --bg-soft:#f5f8fc;     /* section tint */
  --bg-soft-2:#eef3f9;
  --wa:#25d366;          /* whatsapp green */
  --gold:#c89b3c;
  --shadow:0 10px 30px -12px rgba(15,38,71,.18);
  --shadow-lg:0 24px 60px -22px rgba(15,38,71,.32);
  --radius:14px;
  --radius-sm:9px;
  --maxw:1180px;
  --font:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
/* offset anchored sections so titles aren't hidden behind the sticky header */
section[id],div[id="inquiry"]{scroll-margin-top:84px}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.18;margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.section{padding:84px 0}
.section--soft{background:var(--bg-soft)}
.section--navy{background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#fff}
.section--navy h2,.section--navy h3{color:#fff}
.section-head{max-width:720px;margin:0 0 46px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(26px,3.4vw,38px)}
.section-head p{color:var(--muted);font-size:17px;margin-top:14px}
.section--navy .section-head p{color:#b9c8df}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:15px;
  padding:13px 22px;border-radius:10px;cursor:pointer;border:1px solid transparent;
  transition:.18s ease;white-space:nowrap;line-height:1}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px -8px rgba(47,123,214,.6)}
.btn-primary:hover{background:var(--blue-d);transform:translateY(-1px)}
.btn-wa{background:var(--wa);color:#fff}
.btn-wa:hover{background:#1ebe5a;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:#eef3f9}
.btn-sm{padding:10px 16px;font-size:14px}
.btn-block{width:100%;justify-content:center}

/* ---------- top contact bar ---------- */
.topbar{background:var(--navy);color:#cdd9ec;font-size:13.5px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:18px;height:40px}
.topbar a{color:#cdd9ec;transition:.15s}
.topbar a:hover{color:#fff}
.topbar .tb-left{display:flex;gap:22px;align-items:center}
.topbar .tb-item{display:flex;align-items:center;gap:7px}
.topbar svg{width:14px;height:14px;opacity:.8}
.topbar .tb-right{display:flex;gap:16px;align-items:center}

/* ---------- header / nav ---------- */
.header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:20px;color:var(--navy);letter-spacing:-.02em}
.brand .logo{width:38px;height:38px;flex:none}
.brand small{display:block;font-size:10.5px;font-weight:600;color:var(--muted);letter-spacing:.04em;margin-top:1px}
.nav-links{display:flex;gap:28px;align-items:center;list-style:none;margin:0;padding:0}
.nav-links a{font-size:15px;font-weight:500;color:var(--ink);transition:.15s}
.nav-links a:hover{color:var(--blue)}
.nav-cta{display:flex;align-items:center;gap:12px}
.lang{font-size:13.5px;color:var(--muted);display:flex;gap:6px;align-items:center}
.lang b{color:var(--navy)}
.burger{display:none;background:none;border:0;cursor:pointer;padding:6px;width:42px;height:42px}
.burger span{display:block;width:24px;height:2px;background:var(--navy);margin:5px auto;transition:.2s}

/* ---------- hero ---------- */
.hero{position:relative;background:
   radial-gradient(120% 90% at 85% 10%,#e9f1fb 0%,#f6f9fd 45%,#ffffff 100%);
   overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
  padding:64px 0 70px}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.08;letter-spacing:-.02em}
.hero h1 span{color:var(--blue)}
.hero .lead{font-size:18px;color:var(--steel);margin:20px 0 26px;max-width:540px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.chip{display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line);
  padding:8px 14px;border-radius:30px;font-size:13.5px;font-weight:600;color:var(--navy);
  box-shadow:0 2px 8px -4px rgba(15,38,71,.12)}
.chip svg{width:15px;height:15px;color:var(--blue)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-media{position:relative}
.hero-media .machine{border-radius:var(--radius);box-shadow:var(--shadow-lg);
  border:1px solid var(--line);background:#fff;width:100%}
.hero-badge{position:absolute;left:-14px;bottom:-16px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:14px 18px;box-shadow:var(--shadow);display:flex;gap:13px;align-items:center}
.hero-badge .num{font-size:26px;font-weight:800;color:var(--blue);line-height:1}
.hero-badge .lbl{font-size:12.5px;color:var(--muted);font-weight:600;line-height:1.3}

/* ---------- trust strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:48px}
.stat{text-align:center;padding:8px}
.stat .num{font-size:clamp(28px,3.6vw,40px);font-weight:800;color:var(--navy);line-height:1}
.stat .num span{color:var(--blue)}
.stat .lbl{font-size:14px;color:var(--muted);margin-top:8px;font-weight:500}
.partners-cap{text-align:center;font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);font-weight:700;margin-bottom:22px}
.partners-img{max-width:920px;margin:0 auto;opacity:.92}

/* ---------- product cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:.2s ease}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:#cfe0f3}
.card-media{background:linear-gradient(160deg,#eef3f9,#f7fafd);padding:18px;border-bottom:1px solid var(--line)}
.card-media img{margin:0 auto;max-height:185px;object-fit:contain}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.card .tag{font-size:11.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);margin-bottom:8px}
.card h3{font-size:20px;margin-bottom:6px}
.card .series{font-size:13px;color:var(--muted);font-weight:600;margin-bottom:14px}
.card .feat{list-style:none;padding:0;margin:0 0 18px;font-size:14.5px}
.card .feat li{display:flex;gap:9px;padding:5px 0;color:var(--ink)}
.card .feat li svg{width:17px;height:17px;color:var(--blue);flex:none;margin-top:3px}
.card .feat b{font-weight:600}
.card-actions{margin-top:auto;display:flex;gap:10px}
.card-actions .btn{flex:1;justify-content:center}

/* ---------- spec tables ---------- */
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px;justify-content:center}
.tab{padding:11px 20px;border:1px solid var(--line);background:#fff;border-radius:30px;
  font-weight:600;font-size:14.5px;cursor:pointer;color:var(--steel);transition:.15s}
.tab.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.tab:hover:not(.active){border-color:var(--blue);color:var(--blue)}
.spec-panel{display:none}
.spec-panel.active{display:block;animation:fade .3s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table.spec{border-collapse:collapse;width:100%;min-width:640px;font-size:14.5px}
table.spec th,table.spec td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line)}
table.spec thead th{background:var(--navy);color:#fff;font-weight:600;font-size:14px;white-space:nowrap}
table.spec tbody th{background:var(--bg-soft);font-weight:600;color:var(--navy);white-space:nowrap}
table.spec tbody tr:last-child td,table.spec tbody tr:last-child th{border-bottom:0}
table.spec td{color:var(--ink)}
.spec-note{font-size:13.5px;color:var(--muted);margin-top:14px}

/* ---------- applications ---------- */
.apps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.app{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.app:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.app img{width:100%;height:170px;object-fit:cover;background:#eef3f9}
.app .app-body{padding:18px 20px}
.app h4{font-size:17px;margin-bottom:6px}
.app p{font-size:14px;color:var(--muted);margin:0}
.ind-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:38px;justify-content:center}
.ind-list span{background:#fff;border:1px solid var(--line);border-radius:8px;padding:9px 15px;
  font-size:14px;font-weight:500;color:var(--navy)}

/* ---------- colors ---------- */
.colors-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.swatches{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.sw{text-align:center}
.sw .dot{width:100%;aspect-ratio:1;border-radius:12px;border:1px solid rgba(0,0,0,.08);
  box-shadow:inset 0 -8px 16px -10px rgba(0,0,0,.4)}
.sw .nm{font-size:12px;color:var(--muted);margin-top:7px;font-weight:600}
.colors-copy h2{font-size:clamp(24px,3vw,34px)}
.colors-copy p{color:var(--muted);margin-top:14px}

/* ---------- why pvd / comparison ---------- */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-bottom:46px}
.why{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:26px 22px}
.why .ic{width:46px;height:46px;border-radius:11px;background:rgba(47,123,214,.2);display:flex;
  align-items:center;justify-content:center;margin-bottom:16px}
.why .ic svg{width:24px;height:24px;color:#7db4f0}
.why h4{font-size:17px;margin-bottom:8px;color:#fff}
.why p{font-size:14px;color:#b9c8df;margin:0}
.cmp-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid rgba(255,255,255,.14)}
table.cmp{border-collapse:collapse;width:100%;min-width:560px;font-size:14.5px;background:rgba(255,255,255,.04)}
table.cmp th,table.cmp td{padding:13px 16px;text-align:left;border-bottom:1px solid rgba(255,255,255,.1);color:#d7e2f1}
table.cmp thead th{background:rgba(47,123,214,.25);color:#fff;font-weight:600}
table.cmp .hl{color:#fff;font-weight:600}
table.cmp .good{color:#7ee0a3;font-weight:600}

/* ---------- solutions ---------- */
.sol-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.sol{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.sol img{width:100%;height:210px;object-fit:cover}
.sol .sol-body{padding:26px 26px 28px}
.sol h3{font-size:21px;margin-bottom:10px}
.sol p{color:var(--muted);font-size:15px;margin-bottom:16px}
.sol ul{margin:0;padding-left:18px;color:var(--ink);font-size:14.5px}
.sol li{margin-bottom:7px}

/* ---------- QC / process ---------- */
.qc-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.qc-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.qc-item{display:flex;gap:11px;align-items:flex-start;font-size:14.5px}
.qc-item svg{width:20px;height:20px;color:var(--blue);flex:none;margin-top:2px}
.qc-img{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}

/* ---------- steps (export) ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.step{position:relative;padding:26px 22px;background:var(--bg-soft);border-radius:var(--radius);border:1px solid var(--line)}
.step .n{font-size:13px;font-weight:800;color:#fff;background:var(--blue);width:30px;height:30px;
  border-radius:8px;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.step h4{font-size:16px;margin-bottom:7px}
.step p{font-size:13.5px;color:var(--muted);margin:0}

/* ---------- FAQ ---------- */
.faq{max-width:840px;margin:0 auto}
.qa{border:1px solid var(--line);border-radius:12px;margin-bottom:14px;background:#fff;overflow:hidden}
.qa summary{padding:20px 24px;font-weight:600;font-size:16.5px;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--navy)}
.qa summary::-webkit-details-marker{display:none}
.qa summary .pm{width:22px;height:22px;flex:none;transition:.2s;color:var(--blue)}
.qa[open] summary .pm{transform:rotate(45deg)}
.qa .ans{padding:0 24px 22px;color:var(--muted);font-size:15px}

/* ---------- inquiry ---------- */
.inq-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:46px;align-items:start}
.inq-copy h2{font-size:clamp(26px,3.2vw,36px)}
.inq-copy p{color:#b9c8df;margin-top:14px;font-size:16px}
.inq-contacts{margin-top:26px;display:flex;flex-direction:column;gap:14px}
.inq-contact{display:flex;gap:13px;align-items:center;color:#e6eefb;font-size:15px}
.inq-contact .ic{width:42px;height:42px;border-radius:10px;background:rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:center;flex:none}
.inq-contact .ic svg{width:20px;height:20px;color:#7db4f0}
.inq-contact b{display:block;font-size:12px;color:#9fb3d1;font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.form-card{background:#fff;border-radius:16px;padding:30px;box-shadow:var(--shadow-lg);color:var(--ink)}
.form-card h3{font-size:20px;margin-bottom:6px}
.form-card .sub{font-size:14px;color:var(--muted);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--navy);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);
  border-radius:9px;font-family:inherit;font-size:15px;color:var(--ink);background:#fbfcfe;transition:.15s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);
  background:#fff;box-shadow:0 0 0 3px rgba(47,123,214,.13)}
.field textarea{resize:vertical;min-height:84px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-explain{font-size:13px;font-weight:600;color:var(--blue-d);background:#eef5fd;
  border:1px solid #d4e6fb;border-radius:9px;padding:11px 13px;margin:4px 0 0;line-height:1.45}
.form-actions{display:flex;gap:12px;margin-top:14px}
.form-actions .btn{flex:1}
.form-hint{font-size:12.5px;color:var(--muted);margin-top:14px;text-align:center}

/* ---------- footer ---------- */
.footer{background:#0b1d38;color:#a9bad4;font-size:14.5px;padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;margin-bottom:40px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em}
.footer a{color:#a9bad4;transition:.15s}.footer a:hover{color:#fff}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin-bottom:10px}
.footer .brand-f{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:19px;margin-bottom:14px}
.footer .brand-f .logo{width:34px;height:34px}
.footer .desc{font-size:14px;color:#8fa3c2;max-width:300px}
.office{margin-bottom:16px}
.office b{color:#cdd9ec;font-weight:600;display:block;margin-bottom:3px}
.office span{font-size:13.5px;color:#8fa3c2}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7e92b3}

/* ---------- mobile sticky CTA ---------- */
.mobile-cta{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 24px -10px rgba(15,38,71,.25);
  padding:8px;grid-template-columns:1fr 1fr 1fr;gap:8px}
.mobile-cta a{display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 4px;
  border-radius:10px;font-size:11.5px;font-weight:700;color:var(--navy)}
.mobile-cta a svg{width:21px;height:21px}
.mobile-cta a.wa{background:var(--wa);color:#fff}
.mobile-cta a.call{background:var(--bg-soft);color:var(--navy)}
.mobile-cta a.inq{background:var(--blue);color:#fff}

/* floating desktop whatsapp */
.float-wa{position:fixed;right:22px;bottom:24px;z-index:65;width:56px;height:56px;border-radius:50%;
  background:var(--wa);display:flex;align-items:center;justify-content:center;box-shadow:0 12px 28px -8px rgba(37,211,102,.6)}
.float-wa svg{width:30px;height:30px;color:#fff}
.float-wa:hover{transform:scale(1.06)}

/* toast */
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%) translateY(20px);
  background:var(--navy);color:#fff;padding:13px 22px;border-radius:10px;font-size:14.5px;font-weight:500;
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:90}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{order:-1}
  .cards,.apps,.why-grid,.steps{grid-template-columns:1fr 1fr}
  .colors-grid,.qc-grid,.sol-grid,.inq-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .swatches{grid-template-columns:repeat(5,1fr)}
}
@media (max-width:760px){
  .section{padding:60px 0}
  .topbar .tb-left .tb-item.hide-sm{display:none}
  .nav-links,.nav-cta .btn{display:none}
  .lang{display:flex;margin-right:6px}      /* keep EN/中文 switch reachable on mobile */
  .burger{display:block}
  .header.open .nav-links{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;
    background:#fff;border-bottom:1px solid var(--line);padding:14px 22px;gap:4px;box-shadow:var(--shadow)}
  .header.open .nav-links a{padding:12px 0;border-bottom:1px solid var(--line)}
  .stats{grid-template-columns:1fr 1fr;gap:24px}
  .cards,.apps,.why-grid,.steps,.qc-list,.field-row{grid-template-columns:1fr}
  .form-actions{flex-direction:column}
  .swatches{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .mobile-cta{display:grid}
  .float-wa{display:none}
  body{padding-bottom:70px}
  .hero-badge{left:8px}
  .form-card{padding:22px}
}
@media (max-width:400px){.swatches{grid-template-columns:repeat(2,1fr)}}