/* ============================================
   CREATRICH BIOTECH — Premium Design System v6
   抗衰老原料与方案服务商 | Anti-Aging Solutions
   ============================================ */

:root {
  /* Colors — Deep Blue + Science Teal + Gold */
  --navy: #060E1E;
  --navy-light: #0B1A33;
  --navy-mid: #0F2442;
  --blue: #1565C0;
  --blue-light: #1E88E5;
  --blue-pale: #42A5F5;
  --teal: #00838F;
  --teal-light: #00ACC1;
  --gold: #B8943C;
  --gold-light: #D4AF5E;
  --white: #FFFFFF;
  --bg: #F8FAFC;
  --bg-alt: #EEF2F6;
  --bg-card: #FFFFFF;
  --text: #141C2E;
  --text2: #4A5568;
  --text3: #718096;
  --border: #E2E8F0;
  --border-light: #EDF2F7;

  /* Typography */
  --font: 'Inter', -apple-system, sans-serif;
  --font-cn: 'Noto Sans SC', -apple-system, sans-serif;

  /* Spacing */
  --section-pad: 120px;

  /* Radius */
  --r-sm: 6px;
  --r: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1);

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{
  font-family:var(--font-cn);
  font-weight:400;
  color:var(--text);
  background:var(--white);
  line-height:1.7;
  overflow-x:hidden;
  font-size:15px;
}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text)}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
button{cursor:pointer;border:none;background:none;font:inherit}
input,select,textarea{font:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:var(--section-pad) 0}

/* ============================================
   NAVBAR
   ============================================ */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:76px;
  background:rgba(6,14,30,0.95);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:transform 0.3s var(--ease), background 0.3s;
}
.navbar.hidden{transform:translateY(-100%)}
.navbar.scrolled{background:rgba(6,14,30,0.98);box-shadow:0 4px 30px rgba(0,0,0,0.3)}
.nav-inner{
  max-width:1280px;margin:0 auto;padding:0 32px;
  height:100%;display:flex;align-items:center;gap:8px;
}
.nav-brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-logo{
  width:42px;height:42px;
  background:linear-gradient(135deg,var(--blue),var(--teal));
  border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
  color:var(--white);font-weight:900;font-size:14px;
  font-family:var(--font);letter-spacing:-0.5px;
}
.nav-brand-text{display:flex;flex-direction:column}
.nav-brand-cn{font-size:15px;font-weight:700;color:var(--white);letter-spacing:0.5px}
.nav-brand-en{font-size:9px;font-weight:600;color:rgba(255,255,255,0.4);letter-spacing:1.5px;font-family:var(--font);text-transform:uppercase}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-menu li a{
  display:flex;align-items:center;padding:10px 16px;
  font-size:13.5px;font-weight:500;
  color:rgba(255,255,255,0.7);
  border-radius:var(--r-sm);
  transition:all 0.2s var(--ease);
  position:relative;
}
.nav-menu li a:hover{color:var(--white);background:rgba(255,255,255,0.06)}
.nav-menu li a.active{color:var(--white);background:rgba(255,255,255,0.08)}
.nav-btn{
  background:var(--blue) !important;color:var(--white) !important;
  padding:10px 20px !important;border-radius:var(--r-sm) !important;
  font-weight:600 !important;margin-left:8px;
  transition:all 0.25s var(--ease) !important;
}
.nav-btn:hover{background:var(--blue-light) !important;transform:translateY(-1px);box-shadow:0 4px 16px rgba(21,101,192,0.4)}
.lang-switch{display:flex;gap:2px;margin-left:12px;background:rgba(255,255,255,0.06);border-radius:var(--r-sm);padding:2px}
.lang-btn{
  padding:6px 12px;font-size:12px;font-weight:600;
  color:rgba(255,255,255,0.5);border-radius:4px;
  transition:all 0.2s;
}
.lang-btn.active{color:var(--white);background:rgba(255,255,255,0.12)}
.lang-btn:hover:not(.active){color:rgba(255,255,255,0.8)}
.hamburger{display:none}

/* ============================================
   HERO — Full Screen Molecular
   ============================================ */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;
  background:var(--navy);
  overflow:hidden;
  padding-top:76px;
}
.hero-particles{position:absolute;inset:0;z-index:1}
.hero-glow{
  position:absolute;
  width:800px;height:800px;
  border-radius:50%;
  filter:blur(120px);opacity:0.08;
  pointer-events:none;
  background:radial-gradient(circle, var(--blue), transparent);
  top:50%;left:50%;transform:translate(-50%,-50%);
  z-index:0;
}
.hero .container{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1fr 1fr;
  gap:80px;align-items:center;
  padding-top:40px;padding-bottom:60px;
}
.hero-left{max-width:560px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.1);
  border-radius:20px;
  font-size:12px;font-weight:600;
  color:rgba(255,255,255,0.8);
  margin-bottom:28px;
  letter-spacing:1px;
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--teal-light);animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:0.5;transform:scale(1)}50%{opacity:1;transform:scale(1.5)}}
.hero h1{
  font-size:clamp(36px,5vw,56px);
  font-weight:800;
  color:var(--white);
  line-height:1.15;
  letter-spacing:-0.5px;
  margin-bottom:20px;
}
.hero h1 .hl{
  background:linear-gradient(135deg,var(--blue-pale),var(--teal-light));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-sub{
  font-size:17px;color:rgba(255,255,255,0.6);line-height:1.6;
  margin-bottom:12px;max-width:440px;
}
.hero-slogan{
  font-size:14px;color:var(--gold-light);letter-spacing:2px;
  font-weight:500;margin-bottom:36px;
  font-style:italic;
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 32px;
  font-size:14px;font-weight:700;
  border-radius:var(--r);
  transition:all 0.3s var(--ease-out);
  letter-spacing:0.3px;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--blue),var(--blue-light));
  color:var(--white);
  box-shadow:0 4px 20px rgba(21,101,192,0.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(21,101,192,0.45)}
.btn-outline{
  background:transparent;
  color:var(--white);
  border:1.5px solid rgba(255,255,255,0.25);
}
.btn-outline:hover{background:rgba(255,255,255,0.06);border-color:rgba(255,255,255,0.4)}
.btn-outline-dark{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}
.btn-outline-dark:hover{background:var(--blue);color:var(--white)}
.btn-white{background:var(--white);color:var(--navy)}
.btn-white:hover{background:rgba(255,255,255,0.9);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-sm{padding:10px 20px;font-size:13px}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;margin-top:48px;
  padding-top:32px;
  border-top:1px solid rgba(255,255,255,0.08);
}
.hero-stat{text-align:center;border-left:1px solid rgba(255,255,255,0.08)}
.hero-stat:first-child{border-left:none}
.hero-stat-num{font-size:30px;font-weight:900;color:var(--white);font-family:var(--font);letter-spacing:-0.5px}
.hero-stat-lbl{font-size:12px;color:rgba(255,255,255,0.4);margin-top:4px;font-weight:500;letter-spacing:0.5px}

/* Hero Visual — Molecular Network SVG */
.hero-visual{display:flex;align-items:center;justify-content:center}
.hero-visual svg{width:100%;max-width:520px;animation:float 6s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}

/* ============================================
   TRUST BAR
   ============================================ */
.trust-bar{
  background:var(--white);
  border-bottom:1px solid var(--border);
  padding:0;
  position:relative;z-index:10;
}
.trust-bar-inner{
  max-width:1200px;margin:0 auto;padding:0 32px;
  display:grid;grid-template-columns:repeat(5,1fr);
}
.trust-item{
  display:flex;align-items:center;justify-content:center;gap:12px;
  padding:24px 16px;
  border-left:1px solid var(--border-light);
  transition:all 0.3s;
}
.trust-item:first-child{border-left:none}
.trust-item-icon{width:40px;height:40px;flex-shrink:0}
.trust-item-info{text-align:left}
.trust-item-val{font-size:18px;font-weight:800;color:var(--navy);font-family:var(--font);line-height:1}
.trust-item-lbl{font-size:11px;color:var(--text3);margin-top:4px;letter-spacing:0.3px}

/* ============================================
   SECTION HEAD
   ============================================ */
.section-head{text-align:center;margin-bottom:72px}
.section-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:11px;font-weight:700;color:var(--blue);
  letter-spacing:2px;margin-bottom:16px;
  font-family:var(--font);text-transform:uppercase;
}
.section-label .dot{width:6px;height:6px;border-radius:50%;background:var(--teal)}
.section-title{
  font-size:clamp(28px,4vw,42px);
  font-weight:800;color:var(--text);
  margin-bottom:16px;letter-spacing:-0.3px;
}
.section-title .hl{color:var(--blue)}
.section-desc{
  font-size:16px;color:var(--text2);max-width:600px;
  margin:0 auto;line-height:1.8;
}
.divider-line{
  width:60px;height:2px;
  background:linear-gradient(90deg,var(--blue),var(--teal));
  margin:24px auto;border-radius:1px;
}

/* ============================================
   BRAND PHILOSOPHY
   ============================================ */
.brand-philosophy{
  background:var(--navy);
  padding:var(--section-pad) 0;
  position:relative;overflow:hidden;
}
.brand-philosophy::before{
  content:'';position:absolute;
  width:600px;height:600px;
  background:radial-gradient(circle,rgba(21,101,192,0.08),transparent 70%);
  top:-200px;left:50%;transform:translateX(-50%);
  pointer-events:none;
}
.philosophy-inner{text-align:center;max-width:720px;margin:0 auto}
.philosophy-icon{width:72px;height:72px;margin:0 auto 32px}
.philosophy-quote{
  font-size:28px;font-weight:700;color:var(--white);line-height:1.6;
  margin-bottom:20px;letter-spacing:1px;
}
.philosophy-body{
  font-size:15px;color:rgba(255,255,255,0.55);
  line-height:2;max-width:600px;margin:0 auto 40px;
}
.philosophy-values{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  max-width:640px;margin:0 auto;
}
.philosophy-value{
  padding:24px 16px;
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.06);
  border-radius:var(--r);
  transition:all 0.3s var(--ease);
}
.philosophy-value:hover{background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.12);transform:translateY(-2px)}
.philosophy-value .num{font-size:26px;font-weight:900;color:var(--gold-light);font-family:var(--font);margin-bottom:8px;opacity:0.6}
.philosophy-value .label{font-size:14px;font-weight:600;color:rgba(255,255,255,0.7);letter-spacing:1px}

/* ============================================
   PRODUCTS — Premium Cards
   ============================================ */
.products-section{background:var(--bg)}
.products-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.product-card{
  position:relative;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  overflow:hidden;
  transition:all 0.4s var(--ease-out);
  cursor:pointer;
  display:flex;flex-direction:column;
}
.product-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-xl);
  border-color:rgba(21,101,192,0.2);
}
.product-card:hover .product-card-img svg{transform:scale(1.05)}
.product-card-img{
  height:180px;
  background:linear-gradient(135deg,rgba(21,101,192,0.04),rgba(0,131,143,0.04));
  display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
}
.product-card-img svg{width:120px;height:120px;transition:transform 0.6s var(--ease-out)}
.product-card-img::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--blue),var(--teal));
  opacity:0;transition:opacity 0.3s;
}
.product-card:hover .product-card-img::after{opacity:1}
.product-card-body{padding:24px;flex:1;display:flex;flex-direction:column}
.product-card-name{
  font-size:17px;font-weight:700;color:var(--text);
  margin-bottom:4px;
}
.product-card-en{
  font-size:12px;font-weight:500;color:var(--text3);font-family:var(--font);
  margin-bottom:12px;letter-spacing:0.3px;
}
.product-card-cas{
  font-size:11px;font-weight:600;color:var(--blue);
  font-family:var(--font);margin-bottom:12px;
  letter-spacing:0.5px;
}
.product-card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.product-card-tag{
  font-size:11px;font-weight:500;
  padding:3px 10px;
  background:rgba(21,101,192,0.06);
  color:var(--blue);
  border-radius:12px;
  letter-spacing:0.2px;
}
.product-card-specs{
  display:grid;grid-template-columns:1fr 1fr;gap:8px;
  padding-top:14px;border-top:1px solid var(--border-light);
  margin-top:auto;
}
.product-card-specs span{display:flex;flex-direction:column}
.s-label{font-size:10px;color:var(--text3);text-transform:uppercase;letter-spacing:0.5px;font-family:var(--font);margin-bottom:2px}
.s-value{font-size:14px;font-weight:700;color:var(--text);font-family:var(--font)}
.product-card-arrow{
  position:absolute;top:16px;right:16px;
  width:32px;height:32px;
  background:rgba(255,255,255,0.9);
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  opacity:0;transform:scale(0.8);transition:all 0.3s var(--ease-out);
  box-shadow:var(--shadow-sm);
}
.product-card:hover .product-card-arrow{opacity:1;transform:scale(1)}
.product-card-arrow svg{width:16px;height:16px}

/* Product card — feature badge */
.product-card-badge{
  display:none;
}

/* ============================================
   SOLUTIONS — NEW Anti-Aging Solutions Section
   ============================================ */
.solutions-section{
  background:var(--white);
  padding:var(--section-pad) 0;
}
.solutions-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:32px;
}
.solution-card{
  padding:40px 32px;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  transition:all 0.4s var(--ease-out);
  text-align:center;
}
.solution-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(21,101,192,0.15)}
.solution-icon{width:56px;height:56px;margin:0 auto 24px}
.solution-card h3{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--text)}
.solution-card p{font-size:14px;color:var(--text2);line-height:1.8;margin-bottom:20px}
.solution-tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.solution-tag{
  font-size:12px;font-weight:500;color:var(--blue);
  padding:5px 14px;background:rgba(21,101,192,0.06);
  border-radius:16px;
}

/* ============================================
   ADVANTAGES
   ============================================ */
.adv-section{background:var(--bg)}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.adv-card{
  padding:36px 28px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  transition:all 0.3s var(--ease-out);
}
.adv-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(21,101,192,0.12)}
.adv-icon{width:40px;height:40px;margin-bottom:20px;color:var(--blue)}
.adv-icon svg{width:40px;height:40px}
.adv-card h3{font-size:16px;font-weight:700;margin-bottom:10px}
.adv-card p{font-size:14px;color:var(--text2);line-height:1.7}

/* ============================================
   QUALITY & TECH
   ============================================ */
.tech-section{background:var(--white)}
.tech-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.tech-card{
  display:flex;gap:24px;align-items:flex-start;
  padding:32px;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  transition:all 0.3s var(--ease-out);
}
.tech-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(21,101,192,0.12)}
.tech-card-icon{width:44px;height:44px;flex-shrink:0;color:var(--blue)}
.tech-card-icon svg{width:44px;height:44px}
.tech-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.tech-card p{font-size:14px;color:var(--text2);line-height:1.7;margin-bottom:12px}
.tech-card ul{display:flex;flex-wrap:wrap;gap:6px}
.tech-card li{font-size:11px;font-weight:500;color:var(--blue);padding:3px 10px;background:rgba(21,101,192,0.06);border-radius:12px}

/* ============================================
   CERTIFICATIONS
   ============================================ */
.cert-section{background:var(--bg)}
.cert-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.cert-item{
  text-align:center;padding:32px 16px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  transition:all 0.3s var(--ease-out);
}
.cert-item:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(21,101,192,0.15)}
.cert-item-icon{width:56px;height:56px;margin:0 auto 16px}
.cert-item h4{font-size:14px;font-weight:700;margin-bottom:4px;font-family:var(--font)}
.cert-item span{font-size:12px;color:var(--text3)}
/* Gold cert */
.cert-item.gold{border-color:rgba(184,148,60,0.2);background:linear-gradient(180deg,rgba(184,148,60,0.04),transparent)}
.cert-item.gold h4{color:var(--gold)}

/* ============================================
   CONTACT
   ============================================ */
.contact-section{background:var(--white)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.contact-info h3{font-size:22px;font-weight:700;margin-bottom:12px}
.contact-info>p{font-size:15px;color:var(--text2);line-height:1.8;margin-bottom:32px}
.contact-detail{
  display:flex;gap:16px;align-items:flex-start;
  padding:18px 0;border-bottom:1px solid var(--border-light);
}
.contact-detail:first-of-type{border-top:1px solid var(--border-light)}
.contact-detail-icon{width:20px;height:20px;flex-shrink:0;margin-top:3px;color:var(--blue)}
.contact-detail-icon svg{width:20px;height:20px}
.contact-detail h4{font-size:15px;font-weight:600;margin-bottom:2px}
.contact-detail p{font-size:13px;color:var(--text3);font-family:var(--font)}
.contact-form{
  padding:40px 32px;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
}
.contact-form h3{font-size:18px;font-weight:700;margin-bottom:24px}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text2);margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{
  width:100%;padding:12px 16px;
  font-size:14px;border:1.5px solid var(--border);
  border-radius:var(--r);background:var(--white);
  color:var(--text);transition:border-color 0.2s;
  outline:none;
}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(21,101,192,0.08)}
.form-group textarea{min-height:100px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-submit{width:100%;justify-content:center;padding:16px;font-size:15px}
#formMessage{display:none;margin-top:16px;padding:12px 16px;border-radius:var(--r);font-size:13px}
#formMessage.success{display:block;background:rgba(0,200,83,0.08);color:#00C853;border:1px solid rgba(0,200,83,0.2)}
#formMessage.error{display:block;background:rgba(255,23,68,0.08);color:#FF1744;border:1px solid rgba(255,23,68,0.2)}

/* ============================================
   CTA BANNER
   ============================================ */
.cta-banner{
  background:linear-gradient(135deg,var(--navy-light),var(--navy));
  padding:100px 0;text-align:center;
  position:relative;overflow:hidden;
}
.cta-banner::before{
  content:'';position:absolute;
  width:500px;height:500px;
  background:radial-gradient(circle,rgba(21,101,192,0.12),transparent 70%);
  top:-100px;right:-100px;pointer-events:none;
}
.cta-banner h2{font-size:clamp(24px,3.5vw,36px);color:var(--white);margin-bottom:12px;font-weight:800}
.cta-banner p{font-size:16px;color:rgba(255,255,255,0.5);margin-bottom:32px}
.cta-banner .btn-white{display:inline-flex}

/* ============================================
   FOOTER
   ============================================ */
.footer{background:var(--navy);padding:72px 0 0;color:var(--white)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px}
.footer-brand h3{font-size:18px;font-weight:700;color:var(--white);margin-bottom:4px}
.footer-brand .en{font-size:10px;color:rgba(255,255,255,0.35);letter-spacing:1.5px;font-family:var(--font);margin-bottom:16px}
.footer-brand p{font-size:14px;color:rgba(255,255,255,0.45);line-height:1.8;max-width:300px}
.footer-col h4{font-size:13px;font-weight:700;color:var(--white);margin-bottom:20px;letter-spacing:1px}
.footer-col a{display:block;font-size:13px;color:rgba(255,255,255,0.45);margin-bottom:12px;transition:color 0.2s}
.footer-col a:hover{color:var(--blue-pale)}
.footer-divider{border-top:1px solid rgba(255,255,255,0.06);margin:48px 0 24px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-bottom:32px}
.footer-bottom p{font-size:12px;color:rgba(255,255,255,0.3)}

/* ============================================
   PAGE HEADER (Sub-pages)
   ============================================ */
.page-header{
  background:var(--navy);
  padding:140px 0 64px;
  text-align:center;
  position:relative;overflow:hidden;
}
.page-header::before{
  content:'';position:absolute;
  width:400px;height:400px;
  background:radial-gradient(circle,rgba(21,101,192,0.08),transparent 70%);
  top:-100px;left:50%;transform:translateX(-50%);pointer-events:none;
}
.page-header h1{font-size:clamp(28px,4vw,42px);color:var(--white);margin-bottom:12px;font-weight:800}
.page-header p{font-size:16px;color:rgba(255,255,255,0.5);max-width:600px;margin:0 auto}
.breadcrumb{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin-bottom:20px;font-size:12px;color:rgba(255,255,255,0.4);
}
.breadcrumb a{color:rgba(255,255,255,0.6);transition:color 0.2s}
.breadcrumb a:hover{color:var(--white)}

/* ============================================
   PRODUCT DETAIL PAGE
   ============================================ */
.product-hero-section{
  padding:80px 0;
  background:var(--white);
}
.product-hero-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;
}
.product-visual-area{
  display:flex;align-items:center;justify-content:center;
  padding:60px 40px;
  background:linear-gradient(135deg,rgba(21,101,192,0.03),rgba(0,131,143,0.03));
  border-radius:var(--r-xl);
  border:1px solid var(--border);
  position:relative;overflow:hidden;
}
.product-visual-area svg{width:260px;height:260px}
.product-hero-info h1{font-size:clamp(28px,3.5vw,38px);font-weight:800;margin-bottom:8px}
.product-hero-info .en-name{font-size:15px;color:var(--text3);font-family:var(--font);font-weight:600;margin-bottom:8px;letter-spacing:1px}
.product-hero-info .cas-badge{
  display:inline-block;font-size:12px;font-weight:600;color:var(--blue);
  padding:4px 12px;background:rgba(21,101,192,0.06);border-radius:12px;
  margin-bottom:20px;font-family:var(--font);
}
.product-hero-info .quick-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0;
}
.qs-item{
  padding:16px;background:var(--bg);border-radius:var(--r);text-align:center;
  border:1px solid var(--border-light);
}
.qs-val{font-size:16px;font-weight:800;color:var(--navy);font-family:var(--font)}
.qs-lbl{font-size:10px;color:var(--text3);margin-top:2px;text-transform:uppercase;letter-spacing:0.5px}
.product-hero-info .desc{font-size:15px;color:var(--text2);line-height:1.8;margin-bottom:24px}
.product-hero-btns{display:flex;gap:12px}

/* Product detail subsections */
.prod-detail-section{padding:80px 0}
.prod-detail-section.alt{background:var(--bg)}
.prod-detail-title{font-size:22px;font-weight:700;margin-bottom:32px;text-align:center}
.mechanism-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.mechanism-card{
  padding:32px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  text-align:center;
  transition:all 0.3s;
}
.mechanism-card:hover{box-shadow:var(--shadow);border-color:rgba(21,101,192,0.15)}
.mechanism-icon{width:40px;height:40px;margin:0 auto 16px;color:var(--blue)}
.mechanism-card h4{font-size:15px;font-weight:700;margin-bottom:8px}
.mechanism-card p{font-size:13px;color:var(--text2);line-height:1.7}
.app-tags{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;
  max-width:700px;margin:0 auto;
}
.app-tag{
  font-size:13px;font-weight:600;color:var(--white);
  padding:8px 20px;background:linear-gradient(135deg,var(--blue),var(--blue-light));
  border-radius:20px;
}
/* Specs table */
.specs-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.specs-table{width:100%;border-collapse:collapse;font-size:14px}
.specs-table th{
  background:var(--navy);color:var(--white);padding:14px 20px;
  text-align:left;font-weight:600;font-size:13px;
  letter-spacing:0.5px;
}
.specs-table th:first-child{border-radius:var(--r-sm) 0 0 0}
.specs-table th:last-child{border-radius:0 var(--r-sm) 0 0}
.specs-table td{padding:14px 20px;border-bottom:1px solid var(--border-light);color:var(--text2)}
.specs-table tr:last-child td{border-bottom:none}
.specs-table tr:nth-child(even) td{background:rgba(21,101,192,0.02)}

/* Related products */
.related-products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-top{
  position:fixed;bottom:32px;right:32px;z-index:999;
  width:48px;height:48px;
  background:var(--navy);color:var(--white);
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-lg);
  cursor:pointer;opacity:0;transform:translateY(20px);
  transition:all 0.3s var(--ease-out);
}
.back-top.visible{opacity:1;transform:translateY(0)}
.back-top:hover{background:var(--blue);transform:translateY(-2px)}

/* ============================================
   ANIMATIONS — Intersection Observer
   ============================================ */
.fade-in{opacity:0;transform:translateY(24px);transition:all 0.7s var(--ease-out)}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  :root{--section-pad:80px}
  .hero .container{grid-template-columns:1fr;text-align:center;gap:48px}
  .hero-left{max-width:100%;margin:0 auto}
  .hero-stats{justify-content:center}
  .hero-visual{display:none}
  .hero-btns{justify-content:center}
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .solutions-grid{grid-template-columns:1fr 1fr}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .cert-grid{grid-template-columns:repeat(3,1fr)}
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .trust-bar-inner{grid-template-columns:repeat(5,1fr)}
  .product-hero-grid{grid-template-columns:1fr;text-align:center}
  .product-hero-btns{justify-content:center}
  .mechanism-grid{grid-template-columns:1fr 1fr}
  .related-products-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width: 768px) {
  :root{--section-pad:64px}
  .container{padding:0 20px}

  /* Navbar */
  .navbar{height:64px}
  .nav-inner{padding:0 20px}
  .nav-brand-cn{font-size:13px}
  .nav-brand-en{font-size:8px}
  .nav-logo{width:36px;height:36px;font-size:12px}
  .nav-menu{
    display:none;flex-direction:column;position:fixed;
    top:64px;left:0;right:0;bottom:0;
    background:var(--navy);padding:24px 20px;
    z-index:999;overflow-y:auto;gap:4px;
    margin-left:0;
  }
  .nav-menu.open{display:flex}
  .nav-menu li{width:100%}
  .nav-menu li a{
    display:block;padding:14px 20px;font-size:15px;width:100%;
    border-radius:var(--r);
  }
  .nav-menu li a.nav-btn{
    text-align:center;margin-top:8px;margin-left:0;
    display:block;
  }
  .hamburger{
    display:flex;flex-direction:column;gap:5px;
    padding:8px;cursor:pointer;
  }
  .hamburger span{display:block;width:20px;height:2px;background:var(--white);border-radius:1px;transition:all 0.3s}
  .hamburger.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .hamburger.open span:nth-child(2){opacity:0}
  .hamburger.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  .lang-switch{margin-left:auto;margin-right:8px}

  /* Hero */
  .hero{min-height:auto;padding:80px 0 60px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15px}
  .hero-slogan{font-size:12px}
  .hero-btns{flex-direction:column;align-items:center}
  .hero-btns .btn{width:100%;justify-content:center;max-width:300px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:16px;margin-top:36px;padding-top:24px}
  .hero-stat{border-left:none;border-top:1px solid rgba(255,255,255,0.08);padding-top:12px}
  .hero-stat:first-child,.hero-stat:nth-child(2){border-top:none;padding-top:0}
  .hero-stat-num{font-size:24px}

  /* Trust Bar */
  .trust-bar-inner{grid-template-columns:repeat(2,1fr)}
  .trust-item:nth-child(3){border-left:none}
  .trust-item{padding:18px 12px}

  /* Products */
  .products-grid{grid-template-columns:1fr;gap:16px}
  .product-card-img{height:150px}

  /* Solutions */
  .solutions-grid{grid-template-columns:1fr;gap:20px}

  /* Advantages */
  .adv-grid{grid-template-columns:1fr;gap:16px}

  /* Tech */
  .tech-grid{grid-template-columns:1fr;gap:16px}
  .tech-card{flex-direction:column;padding:24px 20px}

  /* Cert */
  .cert-grid{grid-template-columns:repeat(3,1fr)}

  /* Contact */
  .form-row{grid-template-columns:1fr}

  /* CTA */
  .cta-banner{padding:64px 0}
  .cta-banner h2{font-size:24px}

  /* Footer */
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}

  /* Philosophy */
  .philosophy-quote{font-size:22px}
  .philosophy-values{grid-template-columns:repeat(2,1fr)}

  /* Product Detail */
  .product-hero-section{padding:48px 0}
  .product-visual-area{padding:40px 20px}
  .product-visual-area svg{width:200px;height:200px}
  .product-hero-info .quick-stats{grid-template-columns:repeat(3,1fr)}
  .mechanism-grid{grid-template-columns:1fr}
  .related-products-grid{grid-template-columns:1fr}

  /* Page Header */
  .page-header{padding:100px 0 48px}
  .page-header h1{font-size:26px}
}

@media (max-width: 480px) {
  .hero h1{font-size:24px}
  .hero-badge{font-size:11px;padding:5px 12px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .trust-bar-inner{grid-template-columns:1fr 1fr}
  .trust-item-val{font-size:16px}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .products-grid{grid-template-columns:1fr}
  .philosophy-quote{font-size:18px}
  .section-title{font-size:24px}
  .product-hero-info h1{font-size:24px}
  .product-hero-info .quick-stats{grid-template-columns:repeat(2,1fr)}
  .btn{padding:12px 24px;font-size:13px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-col{text-align:center}
  .product-hero-section{padding:36px 0}
  .product-visual-area{padding:32px 16px}
  .product-visual-area svg{width:160px;height:160px}
  .breadcrumb{font-size:12px;margin-bottom:16px !important}
  .specs-table{font-size:13px}
  .specs-table th,.specs-table td{padding:10px 12px}
}

@media (max-width: 380px) {
  .nav-brand-cn{font-size:12px}
  .nav-brand-en{display:none}
  .nav-logo{width:30px;height:30px;font-size:10px}
  .lang-btn{padding:5px 8px;font-size:11px}
  .hero-stats{grid-template-columns:1fr;gap:8px;margin-top:24px;padding-top:16px}
  .hero-stat{border-left:none;border-top:1px solid rgba(255,255,255,0.08);padding-top:10px}
  .hero-stat:first-child{border-top:none;padding-top:0}
  .hero-stat-num{font-size:20px}
  .trust-item{padding:14px 8px}
  .trust-item-val{font-size:14px}
  .trust-item-lbl{font-size:10px}
  .product-card-tags{gap:4px}
  .product-card-tag{font-size:10px;padding:2px 8px}
  .cert-grid{grid-template-columns:1fr 1fr;gap:10px}
  .cert-item{padding:20px 12px}
  .cert-item h4{font-size:12px}
  .contact-form{padding:24px 18px}
  .form-group input,.form-group textarea,.form-group select{font-size:14px}
}

/* Product tag overflow handling */
.product-card-tags{overflow:hidden}
.product-card-tag{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.solution-tags{flex-wrap:wrap;gap:6px}

/* Quick-stats responsive labels */
@media (max-width: 480px){
  .qs-item{padding:10px 8px}
  .qs-val{font-size:14px}
  .qs-lbl{font-size:9px}
}

/* Accessibility — respect OS motion preferences */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
    scroll-behavior:auto !important;
  }
}

/* Touch optimizations */
@media (hover:none) and (pointer:coarse){
  .btn{min-height:44px}
  .form-group input,.form-group textarea,.form-group select{min-height:48px;font-size:16px}
  .back-top{width:48px;height:48px}
  a,button{-webkit-tap-highlight-color:transparent}
}