:root{
  --primary:#0066CC;
  --primary-dark:#0052a3;
  --primary-light:#e8f0fe;
  --eco:#00A86B;
  --eco-dark:#008f5a;
  --eco-light:#e6f7f0;
  --foreground:#1e293b;
  --muted:#64748b;
  --border:#e2e8f0;
  --card:#ffffff;
  --background:#f8fafc;
  --bg-gray:#f1f5f9;
  --dark:#0a2540;
  --radius:12px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);
  --shadow:0 4px 12px rgba(0,0,0,0.06),0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:0 12px 32px rgba(0,0,0,0.1),0 4px 8px rgba(0,0,0,0.06);
  --max-w:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  font-size:16px;
  line-height:1.6;
  color:var(--foreground);
  background:var(--background);
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--primary)}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}

/* ===== Header ===== */
.header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,0.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-mark{
  width:40px;height:40px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--eco));
  display:flex;align-items:center;justify-content:center;
  color:white;font-weight:700;font-size:14px;letter-spacing:0.5px;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text .name{font-weight:700;font-size:16px;color:var(--foreground)}
.logo-text .en{font-size:11px;color:var(--muted);letter-spacing:0.3px}

.nav{display:flex;align-items:center;gap:8px}
.nav a{
  padding:8px 16px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--foreground);
  transition:all .2s;
}
.nav a:hover{background:var(--primary-light);color:var(--primary)}
.nav a.active{background:var(--primary-light);color:var(--primary)}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.lang-toggle{
  display:flex;align-items:center;gap:6px;
  padding:6px 14px;border:1px solid var(--border);
  border-radius:20px;background:white;
  font-size:13px;font-weight:500;cursor:pointer;
  transition:all .2s;color:var(--foreground);
}
.lang-toggle:hover{border-color:var(--primary);color:var(--primary)}
.lang-toggle svg{width:14px;height:14px}

.btn-download{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 18px;border-radius:8px;
  background:linear-gradient(135deg,var(--primary),var(--eco));
  color:white;font-size:13px;font-weight:600;
  border:none;cursor:pointer;
  transition:all .3s;
}
.btn-download:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-download svg{width:14px;height:14px}

.mobile-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.mobile-toggle svg{width:24px;height:24px;color:var(--foreground)}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;
  color:white;
  background:linear-gradient(135deg,#0a2540 0%,#0066CC 50%,#00A86B 100%);
  padding:100px 0 120px;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 20% 30%,rgba(0,168,107,0.3),transparent 40%),
             radial-gradient(circle at 80% 70%,rgba(0,102,204,0.3),transparent 35%);
}
.hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.2fr 1fr;gap:60px;align-items:center;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;border-radius:20px;
  background:rgba(255,255,255,0.15);
  backdrop-filter:blur(8px);
  font-size:13px;font-weight:500;
  margin-bottom:24px;
}
.hero-tag svg{width:14px;height:14px}
.hero h1{
  font-size:48px;font-weight:800;line-height:1.2;
  margin-bottom:20px;letter-spacing:-0.5px;
}
.hero h1 .eco{color:#7ee0b8}
.hero p{
  font-size:18px;line-height:1.8;
  opacity:0.9;margin-bottom:36px;
  max-width:560px;
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 28px;border-radius:10px;
  font-size:15px;font-weight:600;
  cursor:pointer;border:none;
  transition:all .3s;
}
.btn-primary{background:white;color:var(--primary)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);color:var(--primary-dark)}
.btn-eco{background:rgba(255,255,255,0.15);color:white;border:1px solid rgba(255,255,255,0.3)}
.btn-eco:hover{background:rgba(255,255,255,0.25);transform:translateY(-2px)}
.btn svg{width:16px;height:16px}

.hero-visual{
  position:relative;display:flex;justify-content:center;align-items:center;
}
.hero-card{
  background:rgba(255,255,255,0.1);
  backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,0.2);
  border-radius:20px;
  padding:32px;
  width:100%;max-width:400px;
}
.hero-card-title{font-size:14px;opacity:0.8;margin-bottom:16px;text-transform:uppercase;letter-spacing:1px}
.hero-card-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.hero-stat{text-align:center}
.hero-stat .num{font-size:28px;font-weight:800}
.hero-stat .lbl{font-size:12px;opacity:0.7}

/* ===== Sections ===== */
section{padding:80px 0}
.section-header{text-align:center;margin-bottom:56px}
.section-tag{
  display:inline-block;
  padding:4px 14px;border-radius:20px;
  background:var(--primary-light);color:var(--primary);
  font-size:13px;font-weight:600;
  margin-bottom:12px;
}
.section-title{
  font-size:36px;font-weight:700;
  color:var(--foreground);
  margin-bottom:12px;
}
.section-desc{
  font-size:16px;color:var(--muted);
  max-width:600px;margin:0 auto;
}

/* ===== Advantages ===== */
.advantages-section{background:var(--bg-gray)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-card{
  background:var(--card);border-radius:var(--radius);
  padding:32px 24px;
  border:1px solid var(--border);
  transition:all .3s;
}
.adv-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:transparent;
}
.adv-icon{
  width:56px;height:56px;border-radius:14px;
  background:linear-gradient(135deg,var(--primary-light),var(--eco-light));
  display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;
  color:var(--primary);
}
.adv-icon svg{width:28px;height:28px}
.adv-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.adv-card p{font-size:14px;color:var(--muted);line-height:1.7}

/* ===== Products ===== */
.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{
  background:var(--card);border-radius:var(--radius);
  overflow:hidden;border:1px solid var(--border);
  transition:all .3s;display:flex;flex-direction:column;
}
.product-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
  border-color:transparent;
}
.product-card-img{
  padding:32px;display:flex;justify-content:center;align-items:center;
  background:linear-gradient(135deg,#f8fafc,#f1f5f9);
}
.product-card-body{padding:24px;flex:1;display:flex;flex-direction:column}
.product-badge{
  display:inline-block;
  padding:3px 10px;border-radius:4px;
  background:var(--eco-light);color:var(--eco-dark);
  font-size:12px;font-weight:600;
  margin-bottom:12px;align-self:flex-start;
}
.product-card h3{font-size:18px;font-weight:700;margin-bottom:6px}
.product-code{font-size:13px;color:var(--primary);font-weight:600;margin-bottom:12px}
.product-card p{font-size:14px;color:var(--muted);line-height:1.6;flex:1;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.product-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:14px;font-weight:600;
}
.product-link:hover{gap:10px}
.product-link svg{width:14px;height:14px;transition:gap .2s}

.product-categories{
  display:flex;gap:12px;justify-content:center;flex-wrap:wrap;
  margin-bottom:40px;
}
.category-btn{
  padding:8px 20px;border-radius:20px;
  border:1px solid var(--border);background:white;
  font-size:14px;font-weight:500;cursor:pointer;
  transition:all .2s;
}
.category-btn:hover{border-color:var(--primary);color:var(--primary)}
.category-btn.active{background:var(--primary);color:white;border-color:var(--primary)}

/* ===== Stats ===== */
.stats-section{
  background:linear-gradient(135deg,var(--primary),var(--eco));
  color:white;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.stat-card{text-align:center}
.stat-number{font-size:48px;font-weight:800;margin-bottom:8px;line-height:1}
.stat-label{font-size:15px;opacity:0.9}

/* ===== News ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--card);border-radius:var(--radius);
  border:1px solid var(--border);
  overflow:hidden;transition:all .3s;
}
.news-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
}
.news-card-img{
  height:180px;
  background:linear-gradient(135deg,var(--primary-light),var(--eco-light));
  display:flex;align-items:center;justify-content:center;
}
.news-card-body{padding:24px}
.news-date{
  font-size:13px;color:var(--muted);
  margin-bottom:10px;
  display:flex;align-items:center;gap:6px;
}
.news-date svg{width:14px;height:14px}
.news-card h3{
  font-size:16px;font-weight:600;
  margin-bottom:10px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card p{font-size:14px;color:var(--muted);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ===== About page ===== */
.about-hero{
  background:linear-gradient(135deg,#0a2540 0%,#0066CC 100%);
  color:white;padding:80px 0;
}
.about-hero h1{font-size:40px;font-weight:800;margin-bottom:16px}
.about-hero p{font-size:18px;opacity:0.9;max-width:600px}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-text h2{font-size:28px;font-weight:700;margin-bottom:20px}
.about-text p{color:var(--muted);line-height:1.8;margin-bottom:16px}
.about-visual{
  aspect-ratio:4/3;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--primary-light),var(--eco-light));
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
}
.about-visual svg{width:120px;height:120px;opacity:0.5}

.timeline{position:relative;padding-left:24px}
.timeline::before{
  content:'';position:absolute;left:8px;top:0;bottom:0;
  width:2px;background:var(--border);
}
.timeline-item{position:relative;margin-bottom:32px}
.timeline-item::before{
  content:'';position:absolute;left:-24px;top:4px;
  width:18px;height:18px;border-radius:50%;
  background:var(--primary);border:4px solid white;
  box-shadow:0 0 0 2px var(--primary);
}
.timeline-year{font-size:13px;font-weight:700;color:var(--primary);margin-bottom:4px}
.timeline-item h4{font-size:16px;font-weight:600;margin-bottom:6px}
.timeline-item p{font-size:14px;color:var(--muted);line-height:1.6}

/* ===== CTA ===== */
.cta-section{
  background:linear-gradient(135deg,var(--primary),var(--eco));
  color:white;padding:60px 0;
}
.cta-inner{
  display:flex;justify-content:space-between;align-items:center;
  gap:32px;flex-wrap:wrap;
}
.cta-text h2{font-size:28px;font-weight:700;margin-bottom:8px}
.cta-text p{opacity:0.9}

/* ===== Contact ===== */
.contact-hero{
  background:linear-gradient(135deg,#0a2540 0%,#00A86B 100%);
  color:white;padding:80px 0;
}
.contact-hero h1{font-size:40px;font-weight:800;margin-bottom:16px}
.contact-hero p{font-size:18px;opacity:0.9}

.contact-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:48px}
.contact-info-list{display:flex;flex-direction:column;gap:20px}
.contact-item{
  display:flex;gap:16px;align-items:flex-start;
  padding:20px;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius);
}
.contact-item-icon{
  width:44px;height:44px;border-radius:12px;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.contact-item-icon svg{width:20px;height:20px}
.contact-item h4{font-size:15px;font-weight:600;margin-bottom:4px}
.contact-item p{font-size:14px;color:var(--muted);line-height:1.5}

.contact-form{
  background:var(--card);border-radius:var(--radius);
  padding:32px;border:1px solid var(--border);
}
.contact-form h3{font-size:20px;font-weight:700;margin-bottom:24px}
.form-group{margin-bottom:20px}
.form-group label{
  display:block;font-size:14px;font-weight:500;
  margin-bottom:8px;color:var(--foreground);
}
.form-group input,.form-group textarea{
  width:100%;padding:12px 16px;
  border:1px solid var(--border);border-radius:8px;
  font-size:14px;font-family:inherit;
  background:white;color:var(--foreground);
  transition:border-color .2s,box-shadow .2s;
}
.form-group input:focus,.form-group textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-light);
}
.form-group textarea{resize:vertical;min-height:120px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.btn-submit{
  width:100%;padding:14px;
  background:linear-gradient(135deg,var(--primary),var(--eco));
  color:white;font-size:15px;font-weight:600;
  border:none;border-radius:8px;cursor:pointer;
  transition:all .3s;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn-submit:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-submit svg{width:16px;height:16px}

.map-placeholder{
  height:300px;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--bg-gray),var(--primary-light));
  border:1px solid var(--border);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--muted);margin-top:32px;
}
.map-placeholder svg{width:48px;height:48px;margin-bottom:12px;opacity:0.5}

/* ===== Product Detail ===== */
.product-hero{
  background:linear-gradient(135deg,#f8fafc,#f1f5f9);
  padding:60px 0;
  border-bottom:1px solid var(--border);
}
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:24px}
.breadcrumb a:hover{color:var(--primary)}
.product-hero-grid{
  display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:center;
}
.product-hero-img{
  background:var(--card);border-radius:var(--radius);
  padding:40px;display:flex;justify-content:center;align-items:center;
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
}
.product-hero-img svg{max-width:280px;height:auto}
.product-hero-info h1{
  font-size:36px;font-weight:800;margin-bottom:8px;
}
.product-type{
  display:inline-block;
  padding:6px 14px;border-radius:20px;
  background:var(--eco-light);color:var(--eco-dark);
  font-size:13px;font-weight:600;margin-bottom:20px;
}
.product-hero-info .desc{
  font-size:16px;color:var(--muted);line-height:1.8;
  margin-bottom:28px;
}
.product-hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-solid{
  background:var(--primary);color:white;
}
.btn-solid:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-outline{
  background:white;color:var(--primary);border:1px solid var(--primary);
}
.btn-outline:hover{background:var(--primary-light);transform:translateY(-2px)}

.product-sections{padding:60px 0}
.product-section{margin-bottom:48px}
.product-section:last-child{margin-bottom:0}
.product-section h2{
  font-size:24px;font-weight:700;margin-bottom:20px;
  padding-left:14px;position:relative;
}
.product-section h2::before{
  content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:20px;border-radius:2px;
  background:linear-gradient(to bottom,var(--primary),var(--eco));
}

.info-table{
  width:100%;border-collapse:collapse;
  background:var(--card);border-radius:var(--radius);
  overflow:hidden;border:1px solid var(--border);
}
.info-table th,.info-table td{
  padding:14px 20px;text-align:left;
  border-bottom:1px solid var(--border);
  font-size:14px;
}
.info-table th{
  background:var(--bg-gray);font-weight:600;
  color:var(--foreground);width:30%;
}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:none}

.quality-list{
  display:grid;grid-template-columns:repeat(2,1fr);gap:12px;
}
.quality-item{
  display:flex;align-items:center;gap:10px;
  padding:14px 18px;background:var(--card);
  border:1px solid var(--border);border-radius:8px;
}
.quality-icon{
  width:24px;height:24px;border-radius:50%;
  background:var(--eco-light);color:var(--eco-dark);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.quality-icon svg{width:14px;height:14px}

.package-list{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;
}
.package-item{
  padding:16px;text-align:center;
  background:var(--card);border:1px solid var(--border);
  border-radius:8px;font-size:13px;
  transition:all .2s;
}
.package-item:hover{
  border-color:var(--primary);
  background:var(--primary-light);
  color:var(--primary);
}

.apps-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.app-card{
  padding:24px 16px;text-align:center;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);
  transition:all .3s;
}
.app-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:var(--primary);
}
.app-icon{
  width:48px;height:48px;border-radius:12px;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 12px;
}
.app-icon svg{width:24px;height:24px}
.app-card span{font-size:14px;font-weight:500}

/* ===== Footer ===== */
.footer{
  background:var(--dark);
  color:#cbd5e1;padding:60px 0 24px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.5fr;gap:40px;
  margin-bottom:40px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text .name{color:white}
.footer-brand .logo-text .en{color:#94a3b8}
.footer-brand p{font-size:14px;line-height:1.7;color:#94a3b8}
.footer h4{
  color:white;font-size:15px;font-weight:600;
  margin-bottom:18px;
}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px}
.footer ul li a{font-size:14px;color:#94a3b8;transition:color .2s}
.footer ul li a:hover{color:white}
.footer-contact-item{
  display:flex;gap:12px;margin-bottom:14px;font-size:14px;
  align-items:flex-start;
}
.footer-contact-item svg{width:18px;height:18px;flex-shrink:0;color:var(--eco);margin-top:2px}
.footer-bottom{
  padding-top:24px;border-top:1px solid rgba(255,255,255,0.1);
  display:flex;justify-content:space-between;align-items:center;
  font-size:13px;color:#64748b;flex-wrap:wrap;gap:12px;
}
.footer-bottom a:hover{color:white}

/* ===== Reveal Animation ===== */
.reveal{
  opacity:0;transform:translateY(24px);
  transition:opacity .6s ease,transform .6s ease;
}
.reveal.visible{
  opacity:1;transform:translateY(0);
}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .package-list{grid-template-columns:repeat(2,1fr)}
  .apps-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hero h1{font-size:36px}
}

@media (max-width:768px){
  section{padding:56px 0}
  .section-title{font-size:28px}

  .nav{display:none;position:fixed;top:72px;left:0;right:0;bottom:0;
    background:white;flex-direction:column;padding:24px;gap:4px;z-index:99;
    align-items:stretch;
  }
  .nav.open{display:flex}
  .nav a{padding:14px 16px;font-size:16px;border-radius:8px}

  .header-actions .btn-download{display:none}
  .mobile-toggle{display:block}

  .hero{padding:60px 0 80px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:32px}
  .hero p{font-size:16px}
  .hero-visual{display:none}

  .grid-2{grid-template-columns:1fr;gap:32px}
  .grid-4{grid-template-columns:1fr}
  .products-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .stat-number{font-size:36px}

  .product-hero-grid{grid-template-columns:1fr;gap:32px}
  .product-hero h1{font-size:28px}
  .quality-list{grid-template-columns:1fr}
  .apps-grid{grid-template-columns:repeat(2,1fr)}

  .contact-grid{grid-template-columns:1fr;gap:32px}
  .form-row{grid-template-columns:1fr}

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

  .cta-inner{flex-direction:column;text-align:center}

  .product-hero-actions .btn{flex:1;justify-content:center}
}