/* ============================================
   CHENG YE GROUP — Light & Elegant Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* ---------- Variables ---------- */
:root {
  --bg: #faf8f5;
  --bg-card: #ffffff;
  --bg-warm: #f5f0eb;
  --bg-dark: #f0ebe3;
  --gold: #c9975a;
  --gold-light: #d4a574;
  --gold-dark: #b88642;
  --text-primary: #2a221a;
  --text-secondary: #6a5a4a;
  --text-muted: #9a8a7a;
  --text-dim: #b0a090;
  --text-on-dark-secondary: #c7b8aa;
  --border: #e8e0d8;
  --border-light: #f0ebe5;
  --accent-wood: #c9975a;
  --accent-laminate: #6a8a6a;
  --accent-upholstery: #8a5a6a;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --charcoal: #1a1a1a;
  --cream: #f5f0e8;
  --black: #000000;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* ---------- Typography ---------- */
h1,h2,h3,h4,h5{font-family:var(--font-serif);font-weight:600;line-height:1.15}
.section-label{font-size:11px;font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--gold);margin-bottom:12px}
.section-title{font-size:clamp(28px,4vw,48px);margin-bottom:16px}
.section-sub{font-size:15px;color:var(--text-secondary);max-width:560px;line-height:1.7;margin-bottom:48px}
.section{padding:clamp(60px,8vw,120px) clamp(24px,5vw,80px)}
.section-warm{background:var(--bg-warm)}
.section-dark{background:#1a1410;color:#f0ece6}
.section-dark .section-sub{color:#9a8a7a}
.section-border{border-bottom:1px solid var(--border)}

/* ---------- Header ---------- */
.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,0.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:var(--transition)}
.header-inner{max-width:1400px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,4vw,60px);height:72px}
.header-scrolled{box-shadow:var(--shadow-md)}
.logo{display:flex;align-items:center;gap:10px}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--gold),var(--gold-dark));border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--black);font-size:14px;font-family:var(--font-serif)}
.logo-text{font-family:var(--font-serif);font-size:16px;font-weight:600;letter-spacing:1.5px;color:var(--text-primary)}
.logo-text span{color:var(--gold)}
.nav{display:flex;gap:4px}
.nav a{position:relative;padding:8px 16px;font-size:12px;font-weight:500;letter-spacing:1px;text-transform:uppercase;color:var(--text-muted);transition:var(--transition);border-radius:4px}
.nav a:hover,.nav a.active{color:var(--text-primary);background:var(--bg-warm)}
.nav a.active::after{content:'';position:absolute;bottom:2px;left:16px;right:16px;height:1px;background:var(--gold)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:none}
.nav-toggle span{width:24px;height:1.5px;background:var(--text-primary);transition:var(--transition)}

/* ---------- Hero ---------- */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;background:linear-gradient(160deg,#faf8f5 0%,#f5f0e8 30%,#f0e8dc 60%,#faf8f5 100%)}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at 80% 50%,rgba(201,151,90,0.06) 0%,transparent 60%)}
.hero-overlay{display:none}
.hero-content{max-width:1400px;margin:0 auto;padding:120px clamp(24px,5vw,80px) 80px;position:relative;z-index:2;width:100%}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 18px;border:1px solid rgba(201,151,90,0.3);border-radius:100px;font-size:11px;font-weight:500;letter-spacing:2.5px;text-transform:uppercase;color:var(--gold);margin-bottom:32px;background:rgba(201,151,90,0.06)}
.hero h1{font-size:clamp(36px,5.5vw,72px);font-weight:600;margin-bottom:20px;max-width:900px;letter-spacing:-1px;color:var(--text-primary)}
.hero h1 span{color:var(--gold);font-style:italic}
.hero p{font-size:clamp(15px,1.2vw,18px);color:var(--text-secondary);max-width:600px;line-height:1.8;margin-bottom:40px}
.hero-cta{display:inline-flex;align-items:center;gap:10px;background:var(--gold);color:#fff;padding:14px 36px;border-radius:4px;font-weight:600;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;transition:var(--transition)}
.hero-cta:hover{background:var(--gold-light);transform:translateY(-2px)}
.hero-stats{display:flex;gap:clamp(24px,4vw,56px);margin-top:56px;flex-wrap:wrap}
.hero-stat{position:relative}
.hero-stat:not(:last-child)::after{content:'';position:absolute;right:calc(-1 * clamp(12px,2vw,28px));top:8px;bottom:8px;width:1px;background:rgba(201,151,90,0.2)}
.hero-stat-num{font-family:var(--font-serif);font-size:clamp(28px,3vw,42px);color:var(--gold);font-weight:600;line-height:1;margin-bottom:4px}
.hero-stat-label{font-size:11px;color:var(--text-secondary);letter-spacing:1.5px;text-transform:uppercase;font-weight:500}

/* ---------- Gold Divider ---------- */
.gold-divider{width:40px;height:2px;background:var(--gold);margin:0 0 16px}

/* ---------- Factory Cards ---------- */
.factories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:clamp(16px,2vw,24px)}
.factory-card{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:32px;transition:var(--transition);position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}
.factory-card:hover{border-color:var(--gold);transform:translateY(-4px);box-shadow:var(--shadow-md)}
.factory-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px}
.factory-card.wood::before{background:var(--gold)}
.factory-card.laminate::before{background:#6a8a6a}
.factory-card.upholstery::before{background:#8a5a6a}
.factory-year{font-size:11px;color:var(--gold);font-weight:600;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:4px}
.factory-name{font-family:var(--font-serif);font-size:22px;font-weight:600;margin-bottom:16px;color:var(--text-primary)}
.factory-metrics{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.factory-metric{background:var(--bg-warm);border:1px solid var(--border);padding:4px 12px;border-radius:4px;font-size:11px;font-weight:600;color:var(--text-secondary);letter-spacing:0.5px}
.factory-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:16px}
.factory-badge{display:inline-block;padding:3px 12px;border-radius:3px;font-size:10px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:#fff}
.factory-badge.wood{background:var(--gold)}
.factory-badge.laminate{background:#6a8a6a}
.factory-badge.upholstery{background:#8a5a6a}

/* ---------- Product Grid ---------- */
.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.product-cat{position:relative;background:var(--bg-card);border:1px solid var(--border);border-radius:6px;padding:28px 16px;text-align:center;transition:var(--transition);cursor:pointer;overflow:hidden}
.product-cat::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:var(--gold);transition:var(--transition)}
.product-cat:hover{border-color:var(--gold);box-shadow:var(--shadow-md)}
.product-cat:hover::after{width:40px}
.product-cat-icon{font-size:32px;margin-bottom:10px;display:block}
.product-cat h4{font-size:13px;font-weight:600;letter-spacing:0.5px;color:var(--text-primary)}

/* ---------- Timeline ---------- */
.timeline{display:flex;gap:0;margin-top:48px;overflow-x:auto;padding-bottom:12px;position:relative}
.timeline::before{content:'';position:absolute;top:20px;left:40px;right:40px;height:1px;background:var(--border)}
.timeline-item{flex-shrink:0;width:160px;text-align:center;position:relative;padding-top:40px}
.timeline-dot{position:absolute;top:14px;left:50%;transform:translateX(-50%);width:12px;height:12px;background:var(--gold);border-radius:50%;border:3px solid var(--bg);z-index:2}
.timeline-year{font-size:15px;font-weight:700;color:var(--gold);margin-bottom:4px;font-family:var(--font-serif)}
.timeline-name{font-size:14px;font-weight:600;color:var(--cream);margin-bottom:4px}
.timeline-desc{font-size:11px;color:var(--text-dim);line-height:1.5}

/* ---------- Value Cards ---------- */
.values-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:clamp(16px,2vw,24px)}
.value-card{padding:36px;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;transition:var(--transition);box-shadow:var(--shadow-sm)}
.value-card:hover{border-color:var(--gold);box-shadow:var(--shadow-md)}
.value-num{font-family:var(--font-serif);font-size:28px;color:var(--gold);font-weight:600;margin-bottom:12px;opacity:0.8}
.value-card h4{font-size:17px;font-weight:600;margin-bottom:8px;color:var(--text-primary)}
.value-card p{font-size:14px;color:var(--text-secondary);line-height:1.7}

/* ---------- Flow Steps ---------- */
.flow-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-top:32px}
.flow-step{text-align:center;padding:24px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;position:relative;transition:var(--transition);box-shadow:var(--shadow-sm)}
.flow-step:hover{transform:translateY(-4px);border-color:var(--gold);box-shadow:var(--shadow-md)}
.flow-arrow{display:none}
.flow-num{width:40px;height:40px;background:var(--gold);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;margin:0 auto 14px;font-family:var(--font-serif)}
.flow-step h5{font-size:14px;font-weight:600;margin-bottom:6px;color:var(--text-primary);letter-spacing:0.5px}
.flow-step p{font-size:12px;color:var(--text-secondary);line-height:1.6}

/* ---------- Audit Cards ---------- */
.audit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:32px}
.audit-card{background:var(--bg-card);border:1px solid var(--border);border-radius:6px;padding:24px;text-align:center;transition:var(--transition);box-shadow:var(--shadow-sm)}
.audit-card:hover{border-color:var(--gold);box-shadow:var(--shadow-md)}
.audit-program{font-size:10px;color:var(--text-secondary);text-transform:uppercase;letter-spacing:2px;margin-bottom:4px}
.audit-customer{font-weight:600;color:var(--text-primary);font-size:16px;margin-bottom:4px}
.audit-detail{font-size:11px;color:var(--text-muted)}

/* ---------- Contact ---------- */
.contact-section{padding:clamp(60px,6vw,100px) clamp(24px,5vw,80px);background:var(--bg-warm);text-align:center}
.contact-section h2{font-size:clamp(28px,3.5vw,42px);margin-bottom:12px}
.contact-section .section-sub{max-width:500px;margin:0 auto 40px}
.contact-team{display:flex;justify-content:center;gap:clamp(16px,3vw,40px);flex-wrap:wrap;margin-bottom:40px}
.contact-person{text-align:center;padding:20px;min-width:180px}
.contact-person h4{font-size:15px;font-weight:600;color:var(--gold);margin-bottom:2px}
.contact-person .role{font-size:11px;color:var(--text-secondary);margin-bottom:6px;letter-spacing:0.5px}
.contact-person .email{font-size:13px;color:var(--text-muted);transition:var(--transition)}
.contact-person .email:hover{color:var(--gold)}

/* ---------- Contact Form ---------- */
.contact-form{max-width:520px;margin:0 auto;text-align:left}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--text-muted);margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:4px;color:var(--text-primary);font-size:14px;font-family:var(--font-sans);transition:var(--transition);outline:none}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,151,90,0.1)}
.form-group textarea{min-height:120px;resize:vertical}
.form-submit{background:var(--gold);color:#fff;padding:14px 36px;border:none;border-radius:4px;font-weight:600;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;cursor:pointer;transition:var(--transition);width:100%}
.form-submit:hover{background:var(--gold-light)}
.form-submit:disabled{cursor:wait;opacity:.65}
.form-status{min-height:24px;margin-top:12px;font-size:13px;line-height:1.5;text-align:center}
.form-status.pending{color:var(--text-secondary)}
.form-status.success{color:#39704a}
.form-status.error{color:#9d3b32}
.form-trap{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important}

/* Keep legacy inline cards aligned with the site's light design system. */
[style*="background:var(--charcoal)"]{background:var(--bg-card)!important;border-color:var(--border)!important;box-shadow:var(--shadow-sm)}
[style*="background:var(--charcoal)"] [style*="color:var(--cream)"]{color:var(--text-primary)!important}
[style*="background:var(--charcoal)"] [style*="color:var(--text-secondary)"]{color:var(--text-secondary)!important}

/* ---------- Footer ---------- */
.footer{background:#1a1410;padding:40px clamp(24px,5vw,80px) 24px;text-align:center;border-top:1px solid rgba(255,255,255,0.06)}
.footer-inner{max-width:1400px;margin:0 auto}
.footer-links{display:flex;justify-content:center;gap:32px;margin-bottom:16px;flex-wrap:wrap}
.footer-links a{font-size:11px;color:#b9aa9a;letter-spacing:1px;text-transform:uppercase;transition:var(--transition)}
.footer-links a:hover{color:var(--gold)}
.footer p{font-size:12px;color:#a99a8a;letter-spacing:0.5px}

/* ---------- Page Header ---------- */
.page-header{min-height:50vh;display:flex;align-items:flex-end;padding:120px clamp(24px,5vw,80px) 60px;position:relative;overflow:hidden}
.page-header h1{font-size:clamp(32px,4.5vw,56px);max-width:700px}
.page-header .breadcrumb{font-size:11px;color:var(--text-dim);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:12px}
.page-header .breadcrumb span{color:var(--gold)}

/* ---------- Content Sections ---------- */
.content-block{max-width:800px}
.content-block p{font-size:15px;color:var(--text-secondary);line-height:1.8;margin-bottom:20px}
.content-block .lead{font-size:18px;color:var(--text-primary);line-height:1.7;font-weight:300}

/* ---------- Stats Row ---------- */
.stats-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:24px;margin:32px 0}
.stat-item{text-align:center;padding:24px;background:var(--bg-card);border:1px solid var(--border);border-radius:6px;box-shadow:var(--shadow-sm)}
.stat-item .num{font-family:var(--font-serif);font-size:32px;color:var(--gold);font-weight:600;display:block}
.stat-item .label{font-size:11px;color:var(--text-secondary);letter-spacing:1px;text-transform:uppercase;margin-top:4px}

/* ---------- Factory Detail ---------- */
.factory-detail-grid{display:grid;grid-template-columns:2fr 1fr;gap:48px;align-items:start}
.factory-info h2{font-size:28px;margin-bottom:16px}
.factory-specs{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:24px;box-shadow:var(--shadow-sm)}
.factory-specs h3{font-size:14px;color:var(--gold);letter-spacing:2px;text-transform:uppercase;margin-bottom:16px;font-family:var(--font-sans)}
.factory-spec{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--border)}
.factory-spec:last-child{border-bottom:none}
.factory-spec .key{font-size:13px;color:var(--text-secondary)}
.factory-spec .val{font-size:13px;font-weight:600;color:var(--text-primary)}

/* ---------- Responsive ---------- */
@media(max-width:768px){
  .nav{display:none;position:fixed;top:72px;left:0;right:0;background:rgba(255,255,255,0.98);flex-direction:column;padding:16px;gap:0;border-bottom:1px solid var(--border)}
  .nav.open{display:flex}
  .nav a{padding:12px 16px;border-bottom:1px solid var(--border)}
  .nav a:last-child{border-bottom:none}
  .nav-toggle{display:flex}
  .hero h1{font-size:clamp(28px,8vw,42px)}
  .hero-stats{gap:24px}
  .hero-stat:not(:last-child)::after{display:none}
  .factories-grid{grid-template-columns:1fr}
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .values-grid{grid-template-columns:1fr}
  .flow-steps{grid-template-columns:1fr}
  .factory-detail-grid{grid-template-columns:1fr}
  .timeline{gap:8px}
  .timeline-item{width:130px}
  .audit-grid{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:480px){
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .audit-grid{grid-template-columns:1fr}
  .hero-stats{flex-direction:column;gap:16px}
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--text-dim);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}

/* ---------- Customer Logo Wall ---------- */
.customers-section{background:var(--bg-card);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:clamp(40px,5vw,80px) clamp(24px,5vw,80px);text-align:center}
.customer-logos{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:clamp(16px,3vw,40px);margin-top:32px}
.customer-logo{display:flex;align-items:center;justify-content:center;padding:12px 24px;min-width:120px;height:48px;border:1px solid var(--border);border-radius:4px;font-family:var(--font-serif);font-size:16px;font-weight:600;color:var(--text-muted);letter-spacing:1px;transition:var(--transition);background:var(--bg-warm)}
.customer-logo:hover{border-color:var(--gold);color:var(--gold);background:rgba(201,151,90,0.04);transform:translateY(-2px)}
.customer-logo.featured{color:var(--text-primary);border-color:var(--gold);font-size:18px;background:rgba(201,151,90,0.06)}
.customer-logo.featured:hover{border-color:var(--gold-dark);color:var(--gold-dark)}
.customer-label{font-size:11px;color:var(--text-secondary);letter-spacing:3px;text-transform:uppercase;font-weight:500}

/* ---------- Animations ---------- */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity 0.8s ease,transform 0.8s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}