/* ============================================================
   Zhongbian Machinery — shared stylesheet (multi-page v1)
   ============================================================ */
:root{
  --bg-0:#FFFFFF; --bg-1:#F8FAFC; --bg-2:#F1F5F9; --surface:#FFFFFF; --surface-2:#F8FAFC;
  --line:rgba(15,23,42,.10); --line-strong:rgba(15,23,42,.20);
  --text-1:#0F172A; --text-2:#334155; --text-3:#64748B;
  /* accent = brand blue (site palette switched from red to blue) */
  --accent:#0088D8; --accent-hover:#12A2F0; --accent-press:#0068AE;
  --brand-blue:#0088D8; --brand-blue-bright:#4DA3F5; --on-accent:#FFFFFF;
  --paper:#F2F1ED; --ink:#0F172A; --ink-2:#475569;
  --ease:cubic-bezier(0.22,1,0.36,1);
  --ease-pop:cubic-bezier(0.34,1.56,0.64,1);
}
html{scroll-behavior:smooth}
*,*::before,*::after{box-sizing:border-box}
h1,h2,h3,h4,p,figure,blockquote,ul,ol{margin:0;padding:0}
ul,ol{list-style:none}
img{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
body{
  background:var(--bg-0); color:var(--text-1);
  font-family:'Source Sans 3',system-ui,-apple-system,'Segoe UI',sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
h1,h2,h3,.font-display{font-family:'Lexend','Source Sans 3',system-ui,-apple-system,'Segoe UI',sans-serif}
.mono{font-family:'IBM Plex Mono',ui-monospace,'Cascadia Mono',monospace;font-variant-numeric:tabular-nums}
section{scroll-margin-top:90px}
::selection{background:rgba(0,136,216,.4);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}


/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 28px;min-height:44px;border-radius:3px;font-weight:600;font-size:15px;letter-spacing:.01em;cursor:pointer;border:1px solid transparent;transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease),transform .15s var(--ease)}
.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:0 8px 24px rgba(0,136,216,.3)}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 14px 34px rgba(0,136,216,.46);transform:translateY(-1px);transition-timing-function:var(--ease-pop)}
.btn-primary:active{background:var(--accent-press);transform:translateY(1px);box-shadow:0 4px 12px rgba(0,136,216,.3)}
.btn-secondary{background:transparent;color:var(--text-1);border-color:var(--line-strong)}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent);box-shadow:0 8px 22px rgba(15,23,42,.10);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(1px)}
.paper .btn-secondary{color:var(--ink);border-color:rgba(26,29,34,.3)}
.paper .btn-secondary:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:68px;background:#FFFFFF;border-bottom:1px solid var(--line);transition:box-shadow .3s var(--ease)}
.nav.scrolled{box-shadow:0 8px 28px rgba(15,23,42,.08)}
.nav-inner{max-width:1200px;margin:0 auto;height:100%;padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.logo-word{font-family:'Lexend';font-weight:700;font-size:16px;letter-spacing:.14em;color:var(--accent)}
.nav-links{display:flex;gap:clamp(14px,1.4vw,26px);align-items:center}
.nav-links a{color:var(--text-2);text-decoration:none;font-size:14px;font-weight:500;transition:color .2s;white-space:nowrap}
.nav-links a:hover{color:var(--text-1)}
.nav-links a.active{color:var(--accent)}
.nav-right{display:flex;align-items:center;gap:16px;flex:none}
.nav-quote .q-short{display:none}
@media (max-width:1279px){
  .nav-quote .q-long{display:none}
  .nav-quote .q-short{display:inline}
  .nav-links a{font-size:13.5px}
}
@media (max-width:1150px){
  .nav-links a{font-size:13px}
}
.lang-btn{background:none;border:none;color:var(--text-2);font-family:'IBM Plex Mono';font-size:13px;cursor:pointer;padding:6px 4px;transition:color .2s}
.lang-btn:hover{color:var(--text-1)}
.nav .btn{padding:10px 22px;font-size:14px}
.burger{display:none;background:none;border:1px solid var(--line-strong);border-radius:4px;padding:9px 10px;cursor:pointer}
.burger svg{display:block}
.drawer-overlay{position:fixed;inset:0;z-index:110;background:rgba(5,7,10,.62);opacity:0;pointer-events:none;transition:opacity .3s var(--ease)}
.drawer-overlay.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;z-index:120;width:min(320px,86vw);background:rgba(255,255,255,.98);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);border-left:1px solid var(--line);display:flex;flex-direction:column;padding:92px 22px 32px;overflow-y:auto;transform:translateX(100%);visibility:hidden;transition:transform .35s var(--ease),visibility .35s}
.drawer.open{transform:none;visibility:visible}
.drawer a{color:var(--text-1);text-decoration:none;padding:14px 8px;border-bottom:1px solid var(--line);font-size:16px;line-height:1.6;min-height:48px;display:flex;align-items:center}
.drawer a.active{color:var(--accent)}
.drawer .btn{margin-top:18px;justify-content:center}

/* ---------- layout ---------- */
.container{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:110px 0}
.section-header{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:56px}
.eyebrow{font-family:'IBM Plex Mono';font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--text-3);display:block;margin-bottom:14px}
.section-header h2{font-size:clamp(28px,3.4vw,40px);font-weight:700;letter-spacing:-.01em;line-height:1.1}
.section-sub{color:var(--text-2);font-size:15px;max-width:380px;line-height:1.6}
.paper .section-sub{color:var(--ink-2)}

/* ---------- page banner (inner pages) ---------- */
.page-banner{position:relative;padding:158px 0 60px;background:#0F172A;border-bottom:1px solid var(--line);overflow:hidden}
.page-banner::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px;opacity:.5;
  -webkit-mask-image:linear-gradient(to bottom,#000 20%,transparent 95%);mask-image:linear-gradient(to bottom,#000 20%,transparent 95%)}
.page-banner::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(95deg,rgba(0,0,0,.62) 0%,rgba(0,0,0,.52) 52%,rgba(0,0,0,.42) 100%)}
.page-banner h1{position:relative;z-index:1;font-size:clamp(30px,4vw,48px);font-weight:700;letter-spacing:-.02em;line-height:1.08;color:#FFFFFF}
.page-banner .eyebrow{position:relative;z-index:1;color:rgba(255,255,255,.62)}
.banner-sub{position:relative;z-index:1;color:rgba(255,255,255,.84);font-size:16px;line-height:1.6;max-width:640px;margin-top:14px}
.banner-actions{position:relative;z-index:1;display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.breadcrumb{position:relative;z-index:1;font-family:'IBM Plex Mono';font-size:12px;color:var(--text-3);margin-top:22px;letter-spacing:.05em}
.page-banner .breadcrumb{color:rgba(255,255,255,.58)}
.breadcrumb a{color:var(--text-2);text-decoration:none;transition:color .2s}
.page-banner .breadcrumb a{color:rgba(255,255,255,.84)}
.breadcrumb a:hover{color:var(--accent)}
.page-banner .breadcrumb a:hover{color:#fff}
.breadcrumb .sep{margin:0 10px}
.breadcrumb-page{padding:112px 0 12px}

/* ---------- hero (home) ---------- */
/* ---------- hero (dark navy panel, full-width copy) ---------- */
.hero{position:relative;min-height:100vh;display:grid;grid-template-columns:1.05fr 1fr;overflow:hidden;
  background:#0A1730 url('img/bg-hd-hero-steel-warehouse.webp') center/cover no-repeat}
/* dark wash: heavier on the copy side so the headline stays readable over the photo */
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(95deg,rgba(4,10,20,.90) 0%,rgba(4,10,20,.78) 42%,rgba(4,10,20,.52) 78%,rgba(4,10,20,.40) 100%)}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 55% 65% at 74% 46%,rgba(0,136,216,.16),transparent 72%)}
.hero-copy{position:relative;z-index:2;display:flex;flex-direction:column;justify-content:center;padding:120px 0 80px}
.hero-copy .container{padding:0 32px 0 max(32px,calc((100vw - 1200px)/2 + 32px))}
.hero h1{font-size:clamp(34px,9vw,64px);font-weight:700;line-height:1.04;letter-spacing:-.02em;margin:22px 0 26px;color:#FFFFFF}
.hero h1 .accent{color:var(--brand-blue-bright)}
.hero .eyebrow{color:rgba(255,255,255,.62)}
.hero-sub{color:rgba(255,255,255,.78);font-size:17px;line-height:1.65;max-width:540px;margin-bottom:38px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero .btn-secondary{color:#FFFFFF;border-color:rgba(255,255,255,.45);background:rgba(255,255,255,.06)}
.hero .btn-secondary:hover{border-color:#FFFFFF;color:#FFFFFF;background:rgba(255,255,255,.14)}
.hero-badges{display:flex;gap:22px;margin-top:52px;color:rgba(255,255,255,.62);font-family:'IBM Plex Mono';font-size:12px;letter-spacing:.06em;flex-wrap:wrap}
.hero-badges span{display:flex;align-items:center;gap:8px}
.hero-badges span::before{content:"";width:5px;height:5px;background:var(--brand-blue-bright);border-radius:1px;display:inline-block}

/* ---------- 3D column inside the hero (transparent: one continuous backdrop) ---------- */
.hero-3d{position:relative;z-index:1}
#hero3d{position:absolute;inset:0}
#hero3d canvas{display:block}
#hero3d.fallback{display:grid;place-items:center}
#hero3d.fallback::after{content:'STEEL MOULD - 3D PREVIEW UNAVAILABLE';font-family:'IBM Plex Mono';font-size:12px;letter-spacing:.2em;color:rgba(255,255,255,.42)}
.h-in{opacity:0;transform:translateY(24px);animation:heroIn .7s var(--ease) forwards}
@keyframes heroIn{to{opacity:1;transform:none}}
.d1{animation-delay:.05s}.d2{animation-delay:.13s}.d3{animation-delay:.21s}.d4{animation-delay:.29s}.d5{animation-delay:.37s}.d6{animation-delay:.45s}

/* ---------- stats ---------- */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(240,244,249,.38)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:44px 36px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat b{display:block;font-family:'IBM Plex Mono';font-weight:500;font-size:clamp(26px,2.6vw,36px);color:var(--text-1);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.stat span{color:var(--text-3);font-size:13px;margin-top:8px;display:block;letter-spacing:.04em}

/* ---------- cards / products ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.08);transition:transform .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease);display:flex;flex-direction:column}
a.card{text-decoration:none;color:inherit;cursor:pointer}
.card:hover{transform:translateY(-4px);border-color:rgba(0,136,216,.35);box-shadow:0 16px 40px rgba(16,24,40,.12)}
.ph{aspect-ratio:4/3;display:grid;place-items:center;background:var(--bg-1);border-bottom:1px solid var(--line);position:relative}
.ph::before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(26,29,34,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(26,29,34,.035) 1px,transparent 1px);background-size:24px 24px}
.ph.main{border:1px solid var(--line);border-radius:6px}
.ph.tall{aspect-ratio:3/4}
.ph.wide{aspect-ratio:16/7}
.ph-label{font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-3);text-align:center;padding:0 16px}

/* ---------- real imagery ---------- */
.ph-img,.about-ph-img{display:block;width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:8px}
/* --- card media system (PART7): unified 4:3, image zooms on card hover --- */
.card-media{position:relative;aspect-ratio:4/3;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg-1)}
.card-media .ph-img,.card-media .proj-img{width:100%;height:100%;aspect-ratio:auto;object-fit:cover;border:0;border-radius:0;margin:0;transition:transform .4s var(--ease)}
.card:hover .card-media .ph-img,.proj-card:hover .card-media .proj-img{transform:scale(1.04)}
.card-badge{position:absolute;top:12px;left:12px;z-index:2;background:var(--accent);color:#fff;font-family:'IBM Plex Mono';font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;padding:5px 9px;border-radius:3px}
.card-featured{border-color:rgba(0,136,216,.35)}
.card-featured:hover{border-color:var(--brand-blue)}
/* --- products page filter tabs --- */
.filter-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.filter-tabs .tab{background:transparent;border:1px solid var(--line-strong);border-radius:6px;padding:10px 18px;font-size:14px;font-weight:600;color:var(--text-2);cursor:pointer;transition:color .2s,background .2s,border-color .2s,transform .2s}
.filter-tabs .tab:hover{color:var(--text-1);border-color:var(--text-3);transform:translateY(-1px)}
.filter-tabs .tab.is-active{background:var(--accent);border-color:var(--accent);color:#fff}
.filter-empty{color:var(--text-2);font-size:14px;padding:24px 0}
.about-ph-img{border:1px solid var(--line)}
.pd-main-img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.pd-sub-img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.pd-thumb-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
/* clickable gallery thumbs */
.pd-thumb{padding:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--bg-1);cursor:pointer;transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
.pd-thumb img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.pd-thumb:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 8px 20px rgba(15,23,42,.12)}
.pd-thumb.is-active{border-color:var(--accent);box-shadow:0 0 0 2px rgba(0,136,216,.28)}
/* 3D preview */
.pd-viewer-wrap{position:relative}
.pd-viewer{height:340px;border:1px solid var(--line);border-radius:8px;background:linear-gradient(180deg,#EEF3F9,#E4EAF2);position:relative;overflow:hidden}
.pd-viewer-tag{position:absolute;left:12px;top:12px;z-index:3;font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10.5px;letter-spacing:.16em;color:var(--text-3);pointer-events:none}
.pd-viewer-msg{position:absolute;inset:0;z-index:2;display:grid;place-items:center;font-size:13px;color:var(--text-3);text-align:center;padding:20px}
.pd-viewer-msg[hidden]{display:none}
.pd-viewer canvas{display:block;position:absolute;inset:0}
.pd-viewer-hint{position:absolute;right:12px;bottom:12px;background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:4px;padding:6px 10px;font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-2);pointer-events:none}
@media (max-width:767px){.pd-viewer{height:260px}}

.img-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.img-card img{display:block;width:100%;aspect-ratio:16/10;object-fit:cover}
.img-card figcaption{padding:12px 16px;font-size:12.5px;color:var(--text-3);letter-spacing:.03em}
.card-cap{font-family:'IBM Plex Mono',ui-monospace,'Cascadia Mono',monospace;font-size:11px;color:var(--text-3);letter-spacing:.05em}
.proj-img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:6px;margin-bottom:16px}
.cert-tile{aspect-ratio:3/4;overflow:hidden;border-radius:8px;border:1px solid rgba(26,29,34,.12);background:#fff}
.cert-img{display:block;width:100%;height:100%;object-fit:contain;background:#fff;padding:10px}
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cert-featured{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.cert-featured .cert-tile{aspect-ratio:4/3}
.h2-lg{font-size:clamp(26px,3vw,36px);font-weight:700;letter-spacing:-.01em;line-height:1.14}

/* ---------- faq ---------- */
.faq{max-width:860px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:6px;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:'IBM Plex Mono',ui-monospace,'Cascadia Mono',monospace;color:var(--accent);font-size:20px;line-height:1;transition:transform .2s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-a{padding:0 22px 20px;color:var(--text-2);font-size:14.5px;line-height:1.75}
.proj-card.small{min-height:0}
.proj-card.small .proj-img{aspect-ratio:16/10}

/* ---------- global background: blueprint grid painted on the canvas ----------
   Painted on <html> so it propagates to the viewport canvas: it sits beneath
   every element, cannot be covered by a stacking issue, and needs no JS. */
html{
  background-color:#FFFFFF;
  background-image:
    linear-gradient(rgba(15,23,42,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(15,23,42,.035) 1px,transparent 1px);
  background-size:44px 44px;
}
body{
  background:transparent;
}
/* translucent section tints let the grid read through */
.tint{background:rgba(240,244,249,.38)}

/* page banner with a real photo behind a white wash */
.page-banner.has-photo{background-size:cover;background-position:center;background-repeat:no-repeat}
.page-banner.has-photo::after{background:linear-gradient(95deg,rgba(0,0,0,.68) 0%,rgba(0,0,0,.58) 50%,rgba(0,0,0,.46) 100%)}
.page-banner.has-photo::before{opacity:.5}
.pd-viewer-wrap{position:relative}
@media (max-width:767px){
  .pd-thumb-row{grid-template-columns:repeat(2,1fr)}
}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h2,.card-body h3{font-size:18px;font-weight:600;letter-spacing:-.01em}
.card-body p{color:var(--text-2);font-size:14px;line-height:1.6;flex:1}
.card-link{color:var(--accent);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px;width:fit-content}
a.card:hover .card-link,.card:hover .card-link{color:var(--accent-hover)}
.card-link svg{transition:transform .25s var(--ease)}
a.card:hover .card-link svg,.card:hover .card-link svg{transform:translateX(4px)}

/* ---------- why / equipment ---------- */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:28px;transition:transform .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease)}
.why:hover{transform:translateY(-4px);border-color:rgba(0,136,216,.35);box-shadow:0 16px 40px rgba(16,24,40,.12)}
.why .ic{width:44px;height:44px;border:1px solid rgba(0,136,216,.35);border-radius:4px;display:grid;place-items:center;color:var(--accent);margin-bottom:18px}
.why h3{font-size:17px;margin-bottom:8px}
.why p{color:var(--text-2);font-size:13.5px;line-height:1.6}
.why .num{font-family:'IBM Plex Mono';font-size:26px;color:var(--text-3)}

/* ---------- about split ---------- */
.split{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:center}
.split .lead{color:var(--text-2);font-size:15.5px;line-height:1.75;margin-bottom:16px}
.about-ph{aspect-ratio:4/3;border:1px solid var(--line);border-radius:6px;display:grid;place-items:center;background:var(--bg-1);position:relative;overflow:hidden}
.about-ph::before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:24px 24px}
.about-ph span{font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-3)}

/* ---------- CTA band ---------- */
/* ---------- CTA band: photo backdrop with dark wash ---------- */
.cta-band{position:relative;overflow:hidden;padding:96px 0;background:#0F172A url('img/bg-hd-cta-molten-steel.webp') center/cover no-repeat;border-top:1px solid var(--line)}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,12,22,.88) 0%,rgba(6,12,22,.74) 55%,rgba(6,12,22,.60) 100%)}
.cta-band::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 55% 90% at 12% 50%,rgba(0,136,216,.28),transparent 62%)}
.cta-inner{position:relative;z-index:1;display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(26px,3vw,38px);font-weight:700;letter-spacing:-.01em;line-height:1.15;color:#FFFFFF}
.cta-band h2 em{font-style:normal;color:#7FC4FF}
.cta-band p{color:rgba(255,255,255,.84);font-size:15px;margin-top:12px;max-width:520px;line-height:1.65}
.cta-band .btn-primary{background:#FFFFFF;color:#0F172A;box-shadow:0 8px 24px rgba(0,0,0,.28)}
.cta-band .btn-primary:hover{background:#F1F5F9;color:#0F172A}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-date{font-family:'IBM Plex Mono';font-size:12px;color:var(--text-3);letter-spacing:.08em}
.news-article{max-width:780px}
.news-article .news-meta{display:flex;gap:20px;align-items:center;font-family:'IBM Plex Mono';font-size:12px;color:var(--text-3);letter-spacing:.08em;margin:18px 0 30px}
.news-article h1{font-size:clamp(28px,3.6vw,42px);font-weight:700;letter-spacing:-.02em;line-height:1.15}
.article-body p{color:var(--text-2);font-size:16px;line-height:1.85;margin-bottom:20px}
.article-body .ph{margin:28px 0}
.art-nav{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);padding-top:26px;margin-top:48px}
.art-nav a{color:var(--text-2);text-decoration:none;font-size:14px;max-width:46%;line-height:1.5}
.art-nav a:hover{color:var(--accent)}
.art-nav a.next{text-align:right;margin-left:auto}
.art-nav span{display:block;font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-3);margin-bottom:8px}

/* ---------- product detail ---------- */
.pd{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:start}
.pd-gallery{display:grid;gap:14px}
.ph-thumb-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.ph.thumb{aspect-ratio:1/1}
.pd-info h1{font-size:clamp(28px,3vw,38px);font-weight:700;letter-spacing:-.015em;line-height:1.12;margin-bottom:4px}
.pd-summary{color:var(--text-2);font-size:15.5px;line-height:1.7;margin:14px 0 24px}
.spec-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:6px 22px;box-shadow:0 1px 2px rgba(16,24,40,.06)}
.inquire-row{display:flex;gap:14px;margin-top:24px;flex-wrap:wrap}
.pd-section{margin-top:84px}
.pd-section h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:-.01em;margin-bottom:24px}
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 36px;padding:0;margin:0}
.feature-list li{display:flex;gap:12px;color:var(--text-2);font-size:14.5px;line-height:1.6;list-style:none}
.feature-list li::before{content:"";width:6px;height:6px;background:var(--accent);margin-top:8px;flex:none;border-radius:1px}
.tag-row{display:flex;gap:12px;flex-wrap:wrap}
.tag{border:1px solid var(--line-strong);border-radius:3px;padding:10px 16px;font-size:13.5px;color:var(--text-2);display:inline-flex;gap:10px;align-items:center}
.tag svg{color:var(--accent);flex:none}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:56px;align-items:start}
.map-ph{aspect-ratio:16/10;border:1px solid var(--line);border-radius:6px;background:var(--bg-1);position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:flex-end;padding:20px;margin-top:28px}
.map-ph::before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(26,29,34,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(26,29,34,.04) 1px,transparent 1px);background-size:32px 32px}
.map-ph .pin{position:absolute;top:26%;left:50%;transform:translateX(-50%);color:var(--accent)}
.map-ph b{position:relative;font-size:14px}
.map-ph a{position:relative;color:var(--accent);text-decoration:none;font-size:13px;margin-top:6px;display:inline-flex;gap:6px;align-items:center}
.map-ph a:hover{color:var(--accent-hover)}

/* ---------- quality certs ---------- */
.cert-name{padding:16px 20px 20px;border-top:1px solid var(--line);font-weight:600;font-size:15px;display:flex;align-items:center;gap:10px}
.cert-name svg{color:var(--accent);flex:none}

/* ---------- paper band ---------- */
.paper{background:var(--paper);color:var(--ink)}
.paper .eyebrow{color:var(--ink-2)}
.paper .badge{border-color:rgba(26,29,34,.18);color:var(--ink-2)}
.paper .news-date{color:var(--ink-2)}
.badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.badge{border:1px solid var(--line-strong);border-radius:3px;padding:8px 14px;font-family:'IBM Plex Mono';font-size:12px;color:var(--text-2);letter-spacing:.05em}

/* process / timeline */
.p-row{display:grid;grid-template-columns:150px 40px 1fr;gap:0}
.p-time{font-family:'IBM Plex Mono';font-size:13px;color:var(--ink-2);padding:26px 12px 26px 0;text-align:right}
.p-axis{position:relative}
.p-axis::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:rgba(26,29,34,.14)}
.p-row:first-child .p-axis::before{top:50%}
.p-row:last-child .p-axis::before{bottom:50%}
.p-dot{position:absolute;left:50%;top:36px;width:11px;height:11px;border-radius:50%;background:var(--accent);transform:translateX(-50%);box-shadow:0 0 0 4px rgba(0,136,216,.14)}
.p-body{padding:22px 0 26px 8px}
.p-body h3{font-size:17px;font-weight:600;margin-bottom:6px}
.p-body p{color:var(--ink-2);font-size:13.5px;line-height:1.6;max-width:560px}

/* projects */
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.proj-card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;padding:26px;min-height:210px;display:flex;flex-direction:column;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);box-shadow:0 1px 2px rgba(26,29,34,.06)}
.proj-card:hover{transform:translateY(-4px);border-color:rgba(0,136,216,.35);box-shadow:0 18px 44px rgba(26,29,34,.14)}
.proj-meta{display:flex;justify-content:space-between;font-family:'IBM Plex Mono';font-size:11.5px;color:var(--ink-2);letter-spacing:.06em;margin-bottom:16px;text-transform:uppercase}
.proj-card h2,.proj-card h3{font-size:17.5px;font-weight:600;line-height:1.3;margin-bottom:10px}
.proj-card .scope{color:var(--ink-2);font-size:13.5px;line-height:1.55;flex:1}
.proj-card .client{font-size:12.5px;color:var(--ink);border-top:1px solid rgba(26,29,34,.1);padding-top:12px;margin-top:14px}
.proj-card .client b{font-weight:600}
.proj-card.featured{background:var(--ink);border-color:var(--ink)}
.proj-card.featured h3{color:#fff}
.proj-card.featured .scope,.proj-card.featured .proj-meta{color:rgba(255,255,255,.72)}
.proj-card.featured .client{border-color:rgba(255,255,255,.14);color:#fff}
.proj-card.featured .flag{color:var(--accent)}
.client-wall{margin-top:44px;padding-top:22px;border-top:1px solid rgba(26,29,34,.12);color:var(--ink-2);font-size:12.5px;letter-spacing:.03em;line-height:1.9}

/* ---------- quote form ---------- */
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:34px;box-shadow:0 1px 2px rgba(16,24,40,.06),0 12px 32px rgba(16,24,40,.08)}
.f-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-3)}
.field label b{color:var(--accent);font-weight:500}
.field input,.field select,.field textarea{background:var(--bg-0);border:1px solid var(--line-strong);border-radius:3px;color:var(--text-1);font-family:'Source Sans 3';font-size:14.5px;padding:12px 14px;transition:border-color .2s,box-shadow .2s;width:100%;appearance:none}
.field select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239BA3AF' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
.field textarea{min-height:110px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,136,216,.15)}
.field.error input,.field.error select,.field.error textarea{border-color:#D97706}
.field .err-msg{display:none;color:#D97706;font-size:12px}
.field.error .err-msg{display:block}
.form-card .btn{width:100%;justify-content:center;margin-top:22px}
.form-card .btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ---------- footer ---------- */
footer{background:var(--bg-0);border-top:1px solid var(--line);padding:64px 0 36px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr .9fr 1fr 1.15fr;gap:40px;margin-bottom:52px}
.foot-grid p{color:var(--text-3);font-size:13.5px;line-height:1.7;margin-top:14px;max-width:320px}
.foot-grid h3,.foot-grid h4{font-family:'IBM Plex Mono';font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--text-3);margin-bottom:16px;font-weight:500}
.foot-grid a{display:block;color:var(--text-2);text-decoration:none;font-size:13.5px;padding:5px 0}
.foot-grid a:hover{color:var(--text-1)}
.foot-grid .fcontact{color:var(--text-2);font-size:13.5px;line-height:1.9}
.foot-grid .fcontact a{display:inline;padding:0}
.foot-bottom{border-top:1px solid var(--line);padding-top:26px;color:var(--text-3);font-size:12.5px;font-family:'IBM Plex Mono';letter-spacing:.03em}

/* ---------- toast ---------- */
.toast{position:fixed;bottom:88px;right:28px;z-index:10000;background:#1A1D22;color:#F5F6F8;border:1px solid var(--line-strong);border-left:3px solid var(--accent);border-radius:4px;padding:14px 20px;font-size:14px;box-shadow:0 16px 48px rgba(0,0,0,.5);opacity:0;transform:translateY(12px);transition:opacity .3s var(--ease),transform .3s var(--ease);pointer-events:none;max-width:min(360px,calc(100vw - 40px))}
.toast.show{opacity:1;transform:none}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1099px){
  .proj-grid,.news-grid{grid-template-columns:1fr}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .hero{grid-template-columns:1fr;min-height:0}
  .hero-copy{padding:130px 0 30px}
  .hero-3d{min-height:56vh}
  .split,.pd,.contact-grid{grid-template-columns:1fr;gap:44px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3){border-left:none}
  .stat{padding:32px 28px}
  .nav-links{display:none}
  .burger{display:block}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px}
  .hero-copy .container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .section-header h2,.pd-section h2,.h2-lg{font-size:clamp(26px,6vw,36px)}
  .grid-3,.grid-2,.proj-grid,.news-grid,.f-grid,.why-grid{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .feature-list{grid-template-columns:1fr}
  .section-header{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:40px}
  .p-row{grid-template-columns:64px 28px 1fr}
  .p-time{font-size:11px;padding:22px 8px 22px 0}
  .p-dot{top:30px}
  .stat{padding:24px 20px}
  .stat b{font-size:24px}
  .hero-sub{font-size:15px;line-height:1.6}
  .hero-3d{min-height:0;height:340px}
  .btn{padding:14px 22px}
  .form-card{padding:24px 20px}
  .nav-inner{padding:0 20px}
  .nav .btn{display:none}
  .page-banner{padding:130px 0 48px}
  .page-banner .breadcrumb{margin-top:30px}
  .art-nav{flex-direction:column}
  .art-nav a{max-width:100%}
  .art-nav a.next{text-align:left}
  .foot-grid{grid-template-columns:1fr;gap:36px}
  .toast{left:20px;right:20px;bottom:84px;max-width:none}
}
@media (max-width:479px){
  .hero-cta .btn{width:100%;justify-content:center}
  .contact-list .row{flex-wrap:wrap}
  .contact-list .row span{overflow-wrap:anywhere}
  .foot-grid .fcontact{overflow-wrap:anywhere}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s!important;animation-delay:0s!important;transition-duration:.001s!important}
  .h-in,.reveal{opacity:1;transform:none}
}


/* ---------- social floating buttons (PART12 addon) ---------- */
.social-float{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:12px;z-index:999}
.social-float-btn{display:flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:50%;color:#fff;box-shadow:0 4px 14px rgba(0,0,0,.25);transition:transform .25s ease,box-shadow .25s ease}
.social-float-btn:hover{transform:scale(1.12);box-shadow:0 6px 20px rgba(0,0,0,.35)}
.social-fb{background:#1877F2}
.social-ig{background:linear-gradient(45deg,#f09433,#e6683c,#dc2743,#cc2366,#bc1888)}
.social-tk{background:#000}
.social-wa{background:#25D366;width:56px;height:56px}
.footer-social{display:flex;flex-wrap:wrap;gap:8px;align-content:flex-start}
.footer-social h3{flex:0 0 100%;margin:0 0 8px}
.footer-social a{display:inline-flex;align-items:center;padding:5px 11px;border:1px solid var(--line);border-radius:999px;color:var(--text-2);text-decoration:none;font-size:12.5px;line-height:1.3;transition:border-color .2s ease,color .2s ease,background .2s ease}
.footer-social a:hover{border-color:rgba(255,255,255,.5);color:var(--text-1);background:rgba(255,255,255,.05)}
@media (max-width:768px){
  .social-float{bottom:16px;right:16px;gap:10px}
  .social-float-btn{width:44px;height:44px}
  .social-wa{width:50px;height:50px}
  .toast{bottom:200px}
}

/* hero model switcher (10 products, photo-based GLB with procedural fallback) */
.hero-model-switch{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);display:flex;gap:8px;flex-wrap:wrap;justify-content:center;z-index:3;max-width:96%;padding:0 4px}
.hero-sw-btn{appearance:none;border:1px solid rgba(255,255,255,.22);background:rgba(10,22,40,.55);color:rgba(255,255,255,.82);font:600 12px/1 'IBM Plex Mono',monospace;letter-spacing:.04em;padding:8px 12px;border-radius:999px;cursor:pointer;backdrop-filter:blur(6px);transition:background .18s,color .18s,border-color .18s;-webkit-tap-highlight-color:transparent}
.hero-sw-btn:hover{color:#fff;border-color:rgba(255,255,255,.5)}
.hero-sw-btn[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.hero-load-chip{position:absolute;right:12px;top:12px;z-index:3;font:500 11px/1 'IBM Plex Mono',monospace;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.72);background:rgba(10,22,40,.55);border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:7px 11px;backdrop-filter:blur(6px);pointer-events:none}
@media (max-width:768px){
  .hero-model-switch{flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;scrollbar-width:none;left:12px;right:12px;transform:none;max-width:none;padding-bottom:2px}
  .hero-model-switch::-webkit-scrollbar{display:none}
  .hero-sw-btn{flex:0 0 auto;padding:7px 11px;font-size:11px}
  .hero-load-chip{top:10px;right:10px}
}

/* ---- 产品页 Advantages 卡片（2026-09-22 新增）---- */
.adv-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:22px}
.adv-card{border:1px solid var(--line);border-left:3px solid var(--accent,#1B5FD9);border-radius:8px;padding:16px 18px;background:#fff}
.adv-card h3{font-size:15px;margin:0 0 8px;line-height:1.35}
.adv-card p{margin:0;font-size:14px;line-height:1.7;color:var(--text-2,#4A5568)}
@media (max-width:767px){.adv-grid{grid-template-columns:1fr;gap:12px}.adv-card{padding:14px 15px}}


/* ---- 语言切换下拉（国旗 + 当前语言，点击展开；打开 220ms ease-out，项 stagger 35ms）---- */
.lang-switcher{position:relative;flex:none}
.lang-cur{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:10px;color:var(--text-2);font-family:'IBM Plex Mono',monospace;font-size:13px;line-height:1;padding:8px 11px;cursor:pointer;transition:border-color .15s,color .15s,box-shadow .15s,transform .15s}
.lang-cur:hover{color:var(--text-1);border-color:var(--line-strong);box-shadow:0 2px 10px rgba(15,23,42,.06)}
.lang-cur:active{transform:translateY(1px)}
.lang-cur .chev{transition:transform .22s var(--ease);flex:none}
.lang-switcher.open .lang-cur{border-color:var(--line-strong);color:var(--text-1)}
.lang-switcher.open .chev{transform:rotate(180deg)}
/* 面板：淡入 + 上移 + 缩放（transform-origin 右上）；关闭更快（160ms ease-in） */
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:196px;background:rgba(255,255,255,.88);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:13px;padding:6px;display:flex;flex-direction:column;gap:2px;z-index:70;box-shadow:0 18px 44px rgba(15,23,42,.14),0 2px 8px rgba(15,23,42,.06);opacity:0;visibility:hidden;transform:translateY(7px) scale(.97);transform-origin:top right;pointer-events:none;transition:opacity 160ms ease-in,transform 160ms ease-in,visibility 0s 160ms}
.lang-switcher.open .lang-menu{opacity:1;visibility:visible;transform:translateY(0) scale(1);pointer-events:auto;transition:opacity 220ms cubic-bezier(.22,1,.36,1),transform 220ms cubic-bezier(.22,1,.36,1),visibility 0s}
/* 菜单项 stagger：打开时依次入（每项 +35ms），关闭时不延迟整体快速收回 */
.lang-opt{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:8px;color:var(--text-2);text-decoration:none;font-size:13.5px;white-space:nowrap;opacity:0;transform:translateX(7px);transition:opacity 140ms ease-in,transform 140ms ease-in,background .12s,color .12s;transition-delay:0ms}
.lang-switcher.open .lang-opt{opacity:1;transform:none;transition:opacity 200ms ease-out,transform 200ms var(--ease),background .12s,color .12s;transition-delay:calc(var(--i,0)*35ms)}
.lang-opt:hover{background:var(--bg-2);color:var(--text-1)}
.lang-opt .lang-check{margin-left:auto;flex:none}
/* 当前语言：浅主题色高亮 + 勾（subtle，不用重色） */
.lang-opt.is-current{background:rgba(0,136,216,.08);color:var(--accent)}
.lang-opt.is-current .lang-flag{box-shadow:0 0 0 1px rgba(15,23,42,.14)}
.lang-flag{width:20px;height:14px;object-fit:cover;border-radius:2.5px;display:block;flex:none;box-shadow:0 0 0 1px rgba(15,23,42,.12)}
/* 减少动态偏好：动画全部关闭，直接显隐 */
@media (prefers-reduced-motion: reduce){
  .lang-menu,.lang-opt{transition:none}
  .lang-cur .chev{transition:none}
}

/* ── 询盘表单转化优化（2026-10-12）──────────────────────────────────
   ① .form-trust 社会证明行：降低首次提交的顾虑（"多少人信得过 / 要花多久 / 多久回你"）
   ② 国家改下拉后，select 与 input 视觉统一
   ③ 提交按钮更大更醒目：工业品询盘转化最大的单一元素就是那个按钮 */
.form-trust{
  display:flex;flex-direction:column;gap:2px;margin:0 0 20px;padding:14px 16px;
  background:var(--bg-2,#f6f7f9);border:1px solid var(--line,#e6e8eb);border-radius:10px;
}
.form-trust b{font-size:14.5px;font-weight:600;color:var(--text-1,#111827);line-height:1.5}
.form-trust span{font-size:12.5px;color:var(--text-3,#6b7280);line-height:1.6}

.quote-form select{appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;background-size:15px;
  padding-right:38px}

.quote-form .btn-primary{
  width:100%;padding:16px 24px;font-size:16px;font-weight:600;border-radius:10px;
  box-shadow:0 4px 14px rgba(37,99,235,.28);
  transition:transform .12s ease,box-shadow .2s ease,background .2s ease;
}
.quote-form .btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(37,99,235,.34)}
.quote-form .btn-primary:active{transform:scale(.99)}
@media (max-width:640px){ .quote-form .btn-primary{width:100%;padding:15px 20px;font-size:15.5px} }