/* =========================================================
   KU-WEI TECHNOLOGY — Design System v2
   Precision East · Premium Editorial · Structural Red
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=Source+Sans+3:wght@300;400;600&family=Noto+Serif+TC:wght@300;400;600&family=Noto+Sans+TC:wght@300;400;500&family=Noto+Serif+JP:wght@300;400;600&family=Noto+Sans+JP:wght@300;400;500&display=swap');

/* ─── Tokens ─────────────────────────────────────────── */
:root {
  --cream:      #FAFAF6;
  --cream-2:    #F2F1ED;
  --white:      #FFFFFF;
  --carbon:     #141310;
  --carbon-2:   #1E1C19;
  --carbon-lt:  #3A3835;
  --muted:      #787068;
  --crimson:    #9B001A;
  --crimson-dk: #740014;
  --silver:     #C4C2BA;
  --silver-lt:  #E2E0D8;
  --border:     #DEDAD2;
  --gold:       #8A7240;

  --ff-display: 'Cormorant Garamond','Noto Serif TC','Noto Serif JP',Georgia,serif;
  --ff-body:    'Source Sans 3','Noto Sans TC','Noto Sans JP',sans-serif;

  --nav-h:      72px;
  --w:          min(1320px, 92vw);
  --pad-v:      clamp(80px, 10vw, 140px);
  --ease:       cubic-bezier(0.4,0,0.2,1);
  --ease-out:   cubic-bezier(0,0,0.2,1);
  --dur:        0.32s;
}

/* ─── Reset ──────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--ff-body);background:var(--cream);color:var(--carbon);line-height:1.6;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ─── Typography ─────────────────────────────────────── */
.eyebrow{
  font-family:var(--ff-body);
  font-size:10px;font-weight:600;
  letter-spacing:3px;text-transform:uppercase;
  color:var(--crimson);
  display:flex;align-items:center;gap:14px;
}
.eyebrow::before{
  content:'';display:block;
  width:28px;height:1px;
  background:var(--crimson);flex-shrink:0;
}

/* ─── Layout ─────────────────────────────────────────── */
.w{width:var(--w);margin-inline:auto}
.pad{padding-block:var(--pad-v)}
.bg-cream{background:var(--cream)}
.bg-cream2{background:var(--cream-2)}
.bg-carbon{background:var(--carbon)}
.bg-carbon2{background:var(--carbon-2)}

/* ─── Red Rule ───────────────────────────────────────── */
.rule{display:block;width:40px;height:2px;background:var(--crimson);border:none;margin:24px 0}
.rule--white{background:rgba(255,255,255,0.4)}
.rule--wide{width:64px}

/* ─── Navigation ─────────────────────────────────────── */
#nav{
  position:fixed;top:0;left:0;right:0;
  height:var(--nav-h);z-index:999;
  transition:background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
#nav.scrolled{
  background:rgba(250,250,246,0.97);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:0 1px 0 var(--border);
}
.nav-inner{
  width:var(--w);margin-inline:auto;
  height:100%;display:flex;
  align-items:center;justify-content:space-between;gap:16px;
}
.nav-logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-mark{
  width:36px;height:36px;border-radius:50%;
  border:1.5px solid var(--crimson);
  display:flex;align-items:center;justify-content:center;
  position:relative;flex-shrink:0;
  transition:border-color var(--dur);
}
.nav-mark::before{
  content:'';position:absolute;
  width:24px;height:24px;border-radius:50%;
  border:1px solid rgba(155,0,26,0.25);
}
.nav-mark span{font-size:9px;font-weight:700;color:var(--crimson);z-index:1;transition:color var(--dur)}
#nav/* hero-mode nav: direct gradient background for text protection */
nav.hero-mode{background:linear-gradient(to bottom,rgba(20,19,16,.55) 0%,transparent 100%)}
.hero-mode .nav-mark{border-color:rgba(255,255,255,0.55)}
#nav.hero-mode .nav-mark::before{border-color:rgba(255,255,255,0.15)}
#nav.hero-mode .nav-mark span{color:white}
.nav-brand{line-height:1.1}
.nav-name{font-family:var(--ff-display);font-size:17px;font-weight:500;letter-spacing:0.4px;color:var(--carbon);transition:color var(--dur)}
.nav-sub{font-size:8.5px;letter-spacing:2.5px;text-transform:uppercase;color:var(--muted);transition:color var(--dur)}
#nav.hero-mode .nav-name{color:white}
#nav.hero-mode .nav-sub{color:rgba(255,255,255,0.45)}

.nav-links{display:flex;align-items:center;gap:22px;list-style:none}
.nav-links a{
  font-size:12px;font-weight:400;letter-spacing:0.5px;
  color:var(--carbon);transition:color var(--dur);position:relative;
  white-space:nowrap;
}
.nav-links a::after{
  content:'';position:absolute;bottom:-4px;left:0;
  width:0;height:1px;background:var(--crimson);
  transition:width var(--dur) var(--ease);
}
.nav-links a:hover{color:var(--crimson)}
.nav-links a:hover::after{width:100%}
#nav.hero-mode .nav-links a{color:rgba(255,255,255,0.82)}
#nav.hero-mode .nav-links a:hover{color:white}

.nav-right{display:flex;align-items:center;gap:18px;flex-shrink:0}
.lang-sw{display:flex;align-items:center;gap:2px}
.lang-btn{
  font-size:11px;font-weight:500;letter-spacing:0.3px;
  padding:4px 8px;color:var(--muted);border-radius:2px;
  transition:color var(--dur);
}
.lang-btn.active{color:var(--crimson)}
.lang-btn:hover:not(.active){color:var(--carbon)}
.lang-sep{color:var(--silver);font-size:10px}
#nav.hero-mode .lang-btn{color:rgba(255,255,255,0.45)}
#nav.hero-mode .lang-btn.active{color:white}
#nav.hero-mode .lang-sep{color:rgba(255,255,255,0.2)}

.nav-rfq{
  font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;
  padding:9px 20px;border:1px solid var(--crimson);
  color:var(--crimson);border-radius:2px;
  transition:all var(--dur) var(--ease);
}
.nav-rfq:hover{background:var(--crimson);color:white}
#nav.hero-mode .nav-rfq{border-color:rgba(255,255,255,0.55);color:white}
#nav.hero-mode .nav-rfq:hover{background:white;color:var(--crimson)}

.nav-toggle{display:none;flex-direction:column;gap:5px;padding:10px;cursor:pointer;margin-right:-2px}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--carbon);transition:all var(--dur)}
#nav.hero-mode .nav-toggle span{background:white}

/* ─── Mobile Menu — Full Screen ─────────────────────── */
.nav-mobile{
  display:none;
  position:fixed;
  inset:0;
  z-index:998;
  flex-direction:column;
  justify-content:center;
  padding:0 clamp(28px,8vw,60px);
  padding-top:var(--nav-h);
  background:rgba(20,19,16,.95);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.nav-mobile.open{display:flex}
.nav-mobile-inner{
  display:flex;flex-direction:column;justify-content:center;
  width:100%;height:100%;
  overflow-y:auto;-webkit-overflow-scrolling:touch;
}

.nav-mobile-links{
  display:flex;flex-direction:column;
  margin-bottom:40px;flex:0 0 auto;
}
.nav-mobile-links a{
  display:block;
  font-family:var(--ff-display);
  font-size:clamp(28px,7vw,44px);
  font-weight:300;
  color:rgba(255,255,255,.75);
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:color .2s,padding-left .25s var(--ease);
  letter-spacing:-.01em;
  line-height:1.2;
}
.nav-mobile-links a:last-child{border-bottom:none}
.nav-mobile-links a:hover,
.nav-mobile-links a:active{color:white;padding-left:8px}

.nav-mobile-bottom{
  display:flex;align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;gap:14px;flex:0 0 auto;
}
.nav-mobile-lang{display:flex;gap:2px}
.nav-mobile-lang .lang-btn{
  font-size:13px;font-weight:500;
  padding:7px 13px;
  color:rgba(255,255,255,.38);
  border-radius:2px;transition:color .2s;
}
.nav-mobile-lang .lang-btn.active{color:white}
.nav-mobile-lang .lang-btn:hover{color:rgba(255,255,255,.75)}

.nav-mobile-cta{
  font-size:11px;font-weight:600;
  letter-spacing:1.5px;text-transform:uppercase;
  padding:10px 22px;
  border:1px solid rgba(155,0,26,.65);
  color:var(--crimson);border-radius:2px;
  transition:all .2s;
}
.nav-mobile-cta:hover{background:var(--crimson);color:white}

/* ─── Buttons ─────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--ff-body);font-size:12px;font-weight:600;
  letter-spacing:1.8px;text-transform:uppercase;
  padding:15px 34px;border-radius:1px;
  transition:all var(--dur) var(--ease);cursor:pointer;border:none;
}
.btn-red{background:var(--crimson);color:white}
.btn-red:hover{background:var(--crimson-dk);transform:translateY(-1px);box-shadow:0 6px 24px rgba(155,0,26,0.25)}
.btn-outline{background:transparent;color:var(--carbon);border:1px solid var(--carbon)}
.btn-outline:hover{border-color:var(--crimson);color:var(--crimson)}
.btn-outline-w{background:transparent;color:white;border:1px solid rgba(255,255,255,0.5)}
.btn-outline-w:hover{background:white;color:var(--carbon)}
.btn-arrow::after{content:'→';font-size:15px;font-weight:300;transition:transform var(--dur)}
.btn-arrow:hover::after{transform:translateX(5px)}

/* ─── Section headings ───────────────────────────────── */
.display-title{
  font-family:var(--ff-display);
  font-size:clamp(44px,5.5vw,80px);
  font-weight:300;line-height:1.05;letter-spacing:-0.02em;
}
.section-title{
  font-family:var(--ff-display);
  font-size:clamp(36px,4vw,60px);
  font-weight:400;line-height:1.08;
}
.card-title{
  font-family:var(--ff-display);
  font-size:clamp(20px,1.8vw,26px);
  font-weight:500;line-height:1.2;
}

/* ─── Stats Strip ─────────────────────────────────────── */
.stats-strip{
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.stats-inner{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--white);
}
.stat-cell{
  padding:36px 32px;text-align:center;
  border-right:1px solid var(--border);
}
.stat-cell:last-child{border-right:none}
.stat-n{
  font-family:var(--ff-display);
  font-size:clamp(42px,4vw,64px);
  font-weight:300;line-height:1;
  letter-spacing:-2px;
}
.stat-n sup{font-size:.38em;vertical-align:super;color:var(--crimson)}
.stat-l{font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);margin-top:8px}

/* ─── Product Cards ───────────────────────────────────── */
.product-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:var(--border);
  border:1px solid var(--border);
}
.p-card{
  background:var(--white);
  display:flex;flex-direction:column;
  overflow:hidden;position:relative;
  transition:box-shadow var(--dur) var(--ease);
}
.p-card::before{
  content:'';position:absolute;top:0;left:0;right:0;
  height:2px;background:var(--crimson);
  transform:scaleX(0);transform-origin:left;
  transition:transform 0.45s var(--ease);
}
.p-card:hover::before{transform:scaleX(1)}
.p-card:hover{z-index:2;box-shadow:0 16px 60px rgba(20,19,16,0.13)}
.p-card-img-w{overflow:hidden;aspect-ratio:4/3}
.p-card-img{width:100%;height:100%;object-fit:cover;transition:transform 0.65s var(--ease)}
.p-card:hover .p-card-img{transform:scale(1.05)}
.p-card-body{padding:28px 28px 32px;flex:1;display:flex;flex-direction:column}
.p-card-tag{font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.p-card-name{font-family:var(--ff-display);font-size:22px;font-weight:500;margin-bottom:4px}
.p-card-sub{font-size:12px;color:var(--silver);letter-spacing:0.5px;margin-bottom:14px}
.p-card-desc{font-size:13.5px;color:var(--muted);line-height:1.75;flex:1}
.p-card-link{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:20px;font-size:11px;font-weight:600;
  letter-spacing:1.8px;text-transform:uppercase;
  color:var(--crimson);transition:gap var(--dur);
}
.p-card-link:hover{gap:14px}
.p-card-link::after{content:'→'}

/* ─── Trust Bar ───────────────────────────────────────── */
.trust-bar{padding:28px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.trust-items{display:flex;align-items:center;justify-content:center;gap:44px;flex-wrap:wrap}
.trust-item{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--muted);letter-spacing:0.3px}
.trust-dot{width:4px;height:4px;border-radius:50%;background:var(--silver)}

/* ─── Sustainability ──────────────────────────────────── */
.sustain{position:relative;overflow:hidden;min-height:560px;display:flex;align-items:center}
.sustain-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.sustain-mask{position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,19,16,0.9) 0%,rgba(20,19,16,0.6) 55%,rgba(20,19,16,0.1) 100%)}
.sustain-body{position:relative;z-index:2;color:white;padding-block:var(--pad-v);max-width:580px}
.sustain-body .eyebrow{color:rgba(255,255,255,0.45)}
.sustain-body .eyebrow::before{background:rgba(255,255,255,0.3)}
.sustain-body p{font-size:15px;line-height:1.9;color:rgba(255,255,255,0.7);margin-bottom:36px}

/* ─── Expertise Strip ─────────────────────────────────── */
.exp-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:var(--border);
  border:1px solid var(--border);
}
.exp-cell{
  background:var(--white);
  padding:48px 40px;
  position:relative;overflow:hidden;
}
.exp-num{
  font-family:var(--ff-display);
  font-size:100px;font-weight:300;
  color:var(--silver-lt);line-height:1;
  position:absolute;top:-12px;right:-8px;
  letter-spacing:-4px;pointer-events:none;
  user-select:none;
}
.exp-cell h3{font-family:var(--ff-display);font-size:24px;font-weight:500;margin:12px 0 10px;position:relative;z-index:1}
.exp-cell p{font-size:14px;color:var(--muted);line-height:1.75;position:relative;z-index:1}
.exp-cell a{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:20px;font-size:11px;font-weight:600;
  letter-spacing:1.8px;text-transform:uppercase;
  color:var(--crimson);transition:gap var(--dur);
  position:relative;z-index:1;
}
.exp-cell a:hover{gap:14px}
.exp-cell a::after{content:'→'}

/* ─── CTA Section ─────────────────────────────────────── */
.cta-wrap{
  text-align:center;position:relative;
  padding-block:var(--pad-v);overflow:hidden;
}
.cta-bg-text{
  position:absolute;top:50%;left:50%;
  transform:translate(-50%,-50%);
  font-family:var(--ff-display);
  font-size:clamp(140px,18vw,240px);
  font-weight:300;color:var(--silver-lt);
  letter-spacing:-0.05em;
  pointer-events:none;user-select:none;line-height:1;
  white-space:nowrap;
}
.cta-wrap .inner{position:relative;z-index:2}
.cta-wrap h2{font-family:var(--ff-display);font-size:clamp(40px,5vw,68px);font-weight:300;line-height:1.05;margin:12px 0 20px}
.cta-wrap p{font-size:15px;color:var(--muted);max-width:440px;margin:0 auto 40px;line-height:1.8}
.btn-group{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ─── Contact Info (dark card) ───────────────────────── */
.contact-dark{
  background:var(--carbon);color:white;
  padding:52px 44px;
}
.contact-dark h2{font-family:var(--ff-display);font-size:clamp(28px,3vw,42px);font-weight:400;margin:12px 0 32px;line-height:1.1}
.ci-row{display:flex;align-items:flex-start;gap:16px;margin-bottom:28px}
.ci-ic{
  width:42px;height:42px;
  border:1px solid rgba(255,255,255,0.12);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;flex-shrink:0;
}
.ci-lbl{font-size:9px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,0.35);margin-bottom:4px}
.ci-val{font-size:14px;color:rgba(255,255,255,0.78);line-height:1.6}
.ci-val a{color:rgba(255,255,255,0.78);transition:color var(--dur)}
.ci-val a:hover{color:white}

/* ─── Forms ───────────────────────────────────────────── */
.f-group{margin-bottom:22px}
.f-label{display:block;font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.f-input,.f-select,.f-textarea{
  width:100%;padding:14px 16px;
  font-family:var(--ff-body);font-size:15px;
  color:var(--carbon);background:var(--white);
  border:1px solid var(--border);border-radius:1px;
  outline:none;transition:border-color var(--dur);appearance:none;
}
.f-input:focus,.f-select:focus,.f-textarea:focus{border-color:var(--crimson)}
.f-textarea{min-height:140px;resize:vertical}
.f-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}

/* ─── Page Hero ───────────────────────────────────────── */
.page-hero{
  height:220px;
  padding-top:var(--nav-h);
  position:relative;
  display:flex;align-items:flex-end;overflow:hidden;
}
.page-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.38)}
.page-hero-body{position:relative;z-index:2;color:white;padding-bottom:36px}
.page-hero-body h1{font-family:var(--ff-display);font-size:clamp(36px,4.5vw,60px);font-weight:300;line-height:1.05}

/* ─── Breadcrumb ──────────────────────────────────────── */
.bc{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin-bottom:40px;flex-wrap:wrap}
.bc a{color:var(--muted);transition:color var(--dur)}
.bc a:hover{color:var(--crimson)}
.bc-sep{color:var(--silver)}

/* ─── Footer ──────────────────────────────────────────── */
footer{background:var(--carbon-2);color:rgba(255,255,255,0.65);padding-top:80px;padding-bottom:48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:60px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-rule{width:24px;height:2px;background:var(--crimson);margin-bottom:24px}
.footer-name{font-family:var(--ff-display);font-size:22px;font-weight:400;color:white;margin-bottom:4px}
.footer-sub{font-size:9.5px;letter-spacing:3px;text-transform:uppercase;color:rgba(255,255,255,0.28);margin-bottom:20px}
.footer-tag{font-size:13px;color:rgba(255,255,255,0.45);line-height:1.8;max-width:280px;margin-bottom:24px}
.footer-cline{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:rgba(255,255,255,0.5);margin-bottom:8px}
.footer-cline a{color:rgba(255,255,255,0.5);transition:color var(--dur)}
.footer-cline a:hover{color:white}
.fcol-title{font-size:9.5px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,0.28);margin-bottom:18px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:13.5px;color:rgba(255,255,255,0.5);transition:color var(--dur)}
.footer-links a:hover{color:white}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:32px;font-size:11.5px;color:rgba(255,255,255,0.25);flex-wrap:wrap;gap:12px}

/* ─── Quick Contact Widget ────────────────────────────── */
.qc{position:fixed;bottom:32px;right:32px;z-index:990;display:flex;flex-direction:column;align-items:flex-end;gap:10px}
.qc-menu{
  display:flex;flex-direction:column;gap:8px;
  opacity:0;transform:translateY(12px) scale(0.96);
  pointer-events:none;
  transition:opacity 0.25s var(--ease),transform 0.25s var(--ease);
  transform-origin:bottom right;
}
.qc-menu.open{opacity:1;transform:translateY(0) scale(1);pointer-events:all}
.qc-item{
  display:flex;align-items:center;gap:12px;
  background:var(--carbon);color:white;
  padding:10px 16px 10px 10px;
  border-radius:4px;
  box-shadow:0 4px 20px rgba(20,19,16,0.22);
  white-space:nowrap;
  transition:background var(--dur);
  font-size:13px;cursor:pointer;border:none;font-family:inherit;
  text-decoration:none;
}
.qc-item:hover{background:#2A2825}
.qc-ic{
  width:32px;height:32px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;flex-shrink:0;color:white;
  letter-spacing:0;
}
.qc-ic-line{background:#06C755}
.qc-ic-wa{background:#25D366}
.qc-ic-wc{background:#07C160}
.qc-ic-rfq{background:var(--crimson)}
.qc-lbl{font-size:9px;letter-spacing:1.5px;text-transform:uppercase;color:rgba(255,255,255,.4);margin-bottom:2px}
.qc-trigger{
  width:56px;height:56px;border-radius:50%;
  background:var(--crimson);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 24px rgba(155,0,26,0.4);
  cursor:pointer;
  position:relative;
  transition:background var(--dur),transform var(--dur),box-shadow var(--dur);
}
.qc-trigger::before{
  content:'';
  position:absolute;inset:-4px;border-radius:50%;
  border:2px solid var(--crimson);
  opacity:0;
  animation:qc-pulse 2.5s ease-out infinite;
}
.qc-trigger::after{
  content:'';
  position:absolute;inset:-8px;border-radius:50%;
  border:1.5px solid var(--crimson);
  opacity:0;
  animation:qc-pulse 2.5s ease-out 0.8s infinite;
}
@keyframes qc-pulse{
  0%{transform:scale(1);opacity:.55}
  100%{transform:scale(1.5);opacity:0}
}
.qc-trigger:hover{background:var(--crimson-dk);transform:scale(1.08);box-shadow:0 6px 32px rgba(155,0,26,0.5)}
.qc-icon{display:flex;align-items:center;justify-content:center;transition:transform 0.3s var(--ease)}
.qc-trigger.open::before,.qc-trigger.open::after{display:none}
.qc-phone-icon{transition:transform .3s var(--ease),opacity .3s}
.qc-close-icon{transition:transform .3s var(--ease),opacity .3s}
/* WeChat Modal */
.wc-modal{
  position:fixed;inset:0;z-index:1001;
  background:rgba(0,0,0,.72);
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;
  transition:opacity 0.25s var(--ease);
}
.wc-modal.open{opacity:1;pointer-events:all}
.wc-card{
  background:white;padding:28px 24px 20px;
  border-radius:8px;text-align:center;
  max-width:260px;width:88%;
  transform:scale(0.95);transition:transform 0.25s var(--ease);
}
.wc-modal.open .wc-card{transform:scale(1)}
.wc-card img{width:200px;height:200px;object-fit:contain;margin:12px auto 0}
.wc-title{font-size:13px;font-weight:600;color:var(--carbon);margin-bottom:4px}
.wc-sub{font-size:11px;color:var(--muted)}
.wc-close{margin-top:14px;font-size:11px;color:var(--muted);cursor:pointer;letter-spacing:.5px}

/* ─── Reveal animations ───────────────────────────────── */
.reveal{
  opacity:0;transform:translateY(28px);
  transition:opacity 0.7s var(--ease-out),transform 0.7s var(--ease-out);
  animation:reveal-safe 0.01s 2.5s forwards;
}
@keyframes reveal-safe{to{opacity:1;transform:translateY(0)}}
.reveal.in{opacity:1;transform:translateY(0);animation:none}
.d1{transition-delay:0.1s}.d2{transition-delay:0.2s}.d3{transition-delay:0.3s}.d4{transition-delay:0.4s}

/* ─── Responsive ──────────────────────────────────────── */
@media(max-width:1024px){
  .product-grid,.exp-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .stat-cell:nth-child(2){border-right:none}
}
@media(max-width:768px){
  :root{--nav-h:64px}
  .nav-links,.nav-rfq{display:none}
  .nav-toggle{display:flex}
  .product-grid,.exp-grid{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;text-align:center}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .stat-cell:nth-child(even){border-right:none}
  .trust-items{gap:20px}
  .qc{bottom:20px;right:20px}
}
@media(max-width:480px){
  .btn-group{flex-direction:column;align-items:center}
  .btn{width:100%;justify-content:center}
}

/* ─── Quality Enhancements ────────────────────────────── */

/* Smooth scrolling & selection */
::selection { background: var(--crimson); color: white; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--cream-2); }
::-webkit-scrollbar-thumb { background: var(--silver); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--crimson); }

/* Focus visible for accessibility */
:focus-visible { outline: 2px solid var(--crimson); outline-offset: 3px; }

/* Link transitions */
a { transition: color var(--dur) var(--ease); }

/* Image quality */
img { image-rendering: -webkit-optimize-contrast; }

/* Nav logo animation on hover */
.nav-mark { transition: transform var(--dur) var(--ease), border-color var(--dur); }
.nav-logo:hover .nav-mark { transform: rotate(15deg); }

/* Button press feedback */
.btn:active { transform: translateY(1px) !important; }

/* Product card image zoom smoothness */
.p-card-img { will-change: transform; }

/* Eyebrow line animation */
.eyebrow::before { transition: width 0.4s var(--ease); }

/* Red rule breathing animation on scroll trigger */
@keyframes rule-expand {
  from { width: 0; }
  to   { width: 40px; }
}
.rule.in { animation: rule-expand 0.6s var(--ease-out) forwards; }
.rule { width: 0; }
.rule--wide.in { animation: rule-expand 0.6s var(--ease-out) forwards; }
.rule--wide { width: 0; }

/* Section stagger reveal */
.reveal.in { transition-timing-function: cubic-bezier(0, 0, 0.2, 1); }

/* Nav item active underline */
.nav-links a[aria-current="page"]::after { width: 100%; }

/* Footer hover glow */
.footer-cline a:hover { color: white; text-decoration: none; }

/* Expertise cells number depth */
.exp-num { mix-blend-mode: multiply; }

/* Product tag uppercase tracking */
.p-card-tag { letter-spacing: 2.5px; }

/* Article body link style */
.article-body a { color: var(--crimson); border-bottom: 1px solid rgba(155,0,26,0.3); transition: border-color var(--dur); }
.article-body a:hover { border-bottom-color: var(--crimson); }

/* Better mobile tap targets */
@media (max-width: 768px) {
  .btn { min-height: 48px; }
  .nav-toggle { padding: 12px; }
  .lang-btn { padding: 8px 10px; }
}

/* Print styles */
@media print {
  #nav, .qc, .wc-modal, footer .footer-grid > div:not(:first-child) { display: none; }
  .w { max-width: 100%; }
}

@media(max-width:1100px){
  .nav-links{gap:16px}
  .nav-links a{font-size:11.5px;letter-spacing:0.3px}
  .nav-right{gap:12px}
  .lang-sw{gap:0}
  .lang-btn{padding:4px 6px}
}
.hero-mask{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(20,19,16,.75) 0%,rgba(20,19,16,0) 20%),linear-gradient(108deg,rgba(20,19,16,.78) 0%,rgba(20,19,16,.5) 55%,rgba(20,19,16,.12) 100%)}


/* ═══════════════════════════════════════════════════════
   DESIGN LANGUAGE v2 — Wafer Aesthetic System
   ═══════════════════════════════════════════════════════ */

/* ── ① Wafer engineering grid backgrounds ── */
.pad, .prod-intro, .rfq-section {
  position: relative;
}
.pad::before, .prod-intro::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20,19,16,0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,19,16,0.022) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  z-index: 0;
}
.pad > .w, .prod-intro > .w { position: relative; z-index: 1; }

/* ── ① Rainbow iridescent rule (wafer edge) ── */
.rule, .rule--wide, .rule.in, .rule--wide.in {
  background: linear-gradient(90deg,
    #9B001A 0%, #c44536 25%, #d4a259 45%,
    #7fa67a 65%, #5c7fa3 85%, #9B001A 100%) !important;
  background-size: 200% 100% !important;
  height: 2px !important;
}
.rule.in, .rule--wide.in {
  animation: rule-expand 0.6s var(--ease-out) forwards,
             iridescence 5s linear infinite !important;
}
/* Safety: ensure rules always end up visible */
.rule, .rule--wide {
  animation: rule-expand 0.6s 2s var(--ease-out) forwards,
             iridescence 5s linear infinite !important;
}
@keyframes iridescence {
  0% { background-position: 0% 0; }
  100% { background-position: 200% 0; }
}

/* ── ② Stat numbers: monospace + ritual ── */
.stat-num, .exp-num {
  font-family: 'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace !important;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.stat-num {
  font-size: clamp(44px, 5vw, 72px) !important;
  font-weight: 300 !important;
}
.stat-cell {
  position: relative;
}
.stat-cell::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 24px; height: 1px;
  background: var(--crimson);
  opacity: 0.4;
}

/* ── ③ Photo tone unification ── */
.pd-img img,
.nc-img img, .ac-img img,
.feat-photo img,
.contact-photo img,
.fa-photo img {
  filter: saturate(0.92) contrast(1.04) brightness(1.01);
}

/* ── ⑤ Industrial ticker marquee ── */
.ticker-wrap {
  overflow: hidden;
  background: var(--carbon);
  padding: 18px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: relative;
}
.ticker {
  display: flex;
  gap: 0;
  width: max-content;
  animation: ticker-scroll 40s linear infinite;
}
.ticker-wrap:hover .ticker { animation-play-state: paused; }
.ticker span {
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  padding: 0 32px;
  white-space: nowrap;
  position: relative;
}
.ticker span::after {
  content: '·';
  position: absolute;
  right: -4px;
  color: var(--crimson);
}
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ── ⑥ Scroll progress bar ── */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--crimson), #c44536);
  z-index: 1001;
  transition: width 0.1s linear;
}

/* ── ④ Products dark theater mode ── */
body.products-dark .prod-full-grid {
  background: #1a1916;
  border-color: #2a2825;
}
body.products-dark .pd {
  background: #211f1c;
}
body.products-dark .pd-name { color: #f5f2ec; }
body.products-dark .pd-sub { color: rgba(255,255,255,0.35); }
body.products-dark .pd-desc { color: rgba(255,255,255,0.55); }
body.products-dark .pd-img {
  background: radial-gradient(ellipse at center, #2e2c28 0%, #1a1916 100%);
}
body.products-dark .pd-img img {
  filter: saturate(0.95) contrast(1.06) drop-shadow(0 12px 40px rgba(0,0,0,0.5));
}
body.products-dark .spec-toggle {
  background: #1a1916;
  border-color: #2a2825;
  color: rgba(255,255,255,0.5);
}
body.products-dark .spec-toggle:hover,
body.products-dark .spec-toggle.open {
  background: #252320;
  color: #e85a6e;
}
body.products-dark .spec-content {
  border-color: #2a2825;
}
body.products-dark .spec-p,
body.products-dark .spec-list { color: rgba(255,255,255,0.55); }
body.products-dark .spec-h { color: #e85a6e; }
body.products-dark .spec-table th {
  background: #1a1916;
  color: rgba(255,255,255,0.7);
  border-color: #2a2825;
}
body.products-dark .spec-table td {
  border-color: #2a2825;
  color: rgba(255,255,255,0.55);
}
body.products-dark .pd::before { height: 2px; }


/* ── ⑦ Blueprint engineering spec tables ── */
body.products-dark .spec-content {
  background: 
    linear-gradient(rgba(92,127,163,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92,127,163,0.04) 1px, transparent 1px);
  background-size: 20px 20px;
  position: relative;
}
body.products-dark .spec-content::after {
  content: 'KU-WEI TECHNOLOGY · SPEC SHEET';
  position: absolute;
  top: 8px; right: 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 8px;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.15);
}
body.products-dark .spec-table {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
}
body.products-dark .spec-table th {
  background: rgba(92,127,163,0.12);
  border-color: rgba(92,127,163,0.25);
  color: #a8c4dd;
  letter-spacing: 0.5px;
}
body.products-dark .spec-table td {
  border-color: rgba(92,127,163,0.18);
  color: rgba(255,255,255,0.7);
}