*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#0a5cad;--primary-lt:#0e7490;--accent:#0ea5e9;--warm:#d4744a;--gold:#c8963e;--dark:#0f172a;--gray:#475569;--light:#f6f8fb;--white:#ffffff}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--dark);line-height:1.6;background:var(--white)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;padding:16px 0;transition:all .3s}
.navbar.scrolled{background:rgba(255,255,255,.95);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(0,0,0,.08);padding:10px 0}
.nav-container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center}
.logo{font-size:22px;font-weight:800;color:var(--white);text-decoration:none;letter-spacing:1px}
.logo span{font-size:13px;font-weight:400;margin-left:6px;opacity:.7;letter-spacing:2px;text-transform:uppercase}
.navbar.scrolled .logo,.navbar.scrolled .logo span{color:var(--primary)}
.nav-links{display:flex;list-style:none;gap:32px}
.nav-links a{color:rgba(255,255,255,.85);text-decoration:none;font-size:14px;font-weight:500;transition:color .3s}
.nav-links a:hover{color:var(--white)}
.navbar.scrolled .nav-links a{color:var(--gray)}
.navbar.scrolled .nav-links a:hover{color:var(--accent)}
.hamburger{display:none;background:none;border:none;color:var(--white);font-size:24px;cursor:pointer}
.navbar.scrolled .hamburger{color:var(--primary)}

.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;background:linear-gradient(135deg,var(--dark),var(--primary),var(--primary-lt));overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(0,136,168,.2),transparent)}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(212,116,74,.15),transparent)}
.hero-content{z-index:1;padding:0 24px}
.hero-content h1{font-size:52px;font-weight:900;color:var(--white);line-height:1.2;margin-bottom:16px;letter-spacing:2px}
.hero-sub{font-size:18px;color:rgba(255,255,255,.7);margin-bottom:40px}
.hero-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:14px 36px;background:var(--accent);color:var(--white);border-radius:50px;text-decoration:none;font-weight:600;font-size:15px;transition:all .3s}
.btn-primary:hover{background:#0099BB;transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,136,168,.4)}
.btn-outline{display:inline-block;padding:14px 36px;border:2px solid rgba(255,255,255,.3);color:var(--white);border-radius:50px;text-decoration:none;font-weight:600;font-size:15px;transition:all .3s}
.btn-outline:hover{border-color:var(--white);background:rgba(255,255,255,.1)}
.hero-stats{display:flex;gap:48px;margin-top:80px;z-index:1;flex-wrap:wrap;justify-content:center}
.stat-item{text-align:center}
.stat-num{display:block;font-size:36px;font-weight:900;color:var(--white)}
.stat-label{display:block;font-size:13px;color:rgba(255,255,255,.5);margin-top:4px}

.section{padding:100px 0}
.section-dark{background:var(--light)}
.section-header{text-align:center;margin-bottom:60px}
.section-tag{display:inline-block;padding:4px 16px;background:rgba(0,136,168,.1);color:var(--accent);border-radius:20px;font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;margin-bottom:16px}
.section-header h2{font-size:36px;font-weight:800;color:var(--primary);margin-bottom:12px}
.section-header p{font-size:16px;color:var(--gray);max-width:600px;margin:0 auto}

.about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px}
.about-card{background:var(--white);padding:36px 24px;border-radius:16px;text-align:center;box-shadow:0 2px 20px rgba(0,0,0,.05);transition:transform .3s,box-shadow .3s}
.about-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.1)}
.card-icon{font-size:40px;margin-bottom:16px}
.about-card h3{font-size:20px;color:var(--primary);margin-bottom:12px}
.about-card p{font-size:14px;color:var(--gray);line-height:1.7}
.mission-box{background:linear-gradient(135deg,var(--primary),var(--primary-lt));padding:24px 36px;border-radius:12px;text-align:center}
.mission-box p{color:var(--white);font-size:17px;font-weight:600}

.product-category{margin-bottom:48px}
.product-category h3{font-size:22px;color:var(--primary);margin-bottom:24px}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.product-card{background:var(--white);border-radius:12px;overflow:hidden;box-shadow:0 2px 15px rgba(0,0,0,.05);transition:transform .3s}
.product-card:hover{transform:translateY(-4px)}
.product-img{height:120px;display:flex;align-items:center;justify-content:center;color:var(--white);font-size:28px;font-weight:800;letter-spacing:3px}
.product-card h4{font-size:15px;padding:16px 16px 4px;color:var(--dark)}
.product-card p{font-size:13px;padding:0 16px 16px;color:var(--gray)}

.ai-content{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.ai-feature{padding:20px;background:var(--white);border-radius:12px;margin-bottom:16px;box-shadow:0 2px 15px rgba(0,0,0,.04);border-left:4px solid var(--accent)}
.ai-feature h4{font-size:16px;color:var(--primary);margin-bottom:8px}
.ai-feature p{font-size:14px;color:var(--gray)}
.ai-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ai-stat{background:var(--primary);padding:24px;border-radius:12px;text-align:center;color:var(--white);font-size:13px}
.ai-stat span{display:block;font-size:28px;font-weight:900;margin-bottom:4px}

.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--white);padding:28px;border-radius:12px;box-shadow:0 2px 15px rgba(0,0,0,.04);border-top:3px solid var(--accent)}
.news-date{font-size:12px;color:var(--accent);font-weight:600}
.news-card h3{font-size:17px;color:var(--primary);margin:12px 0}
.news-card p{font-size:14px;color:var(--gray)}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-item{display:flex;gap:16px;align-items:flex-start;margin-bottom:28px}
.contact-icon{font-size:24px;flex-shrink:0;width:48px;height:48px;background:var(--light);border-radius:12px;display:flex;align-items:center;justify-content:center}
.contact-item strong{display:block;color:var(--primary);margin-bottom:4px}
.contact-form{background:var(--white);padding:36px;border-radius:16px;box-shadow:0 4px 30px rgba(0,0,0,.06)}
.contact-form h3{font-size:22px;color:var(--primary);margin-bottom:8px}
.contact-form p{color:var(--gray);margin-bottom:24px;font-size:14px}
.contact-form input,.contact-form textarea{width:100%;padding:12px 16px;margin-bottom:16px;border:1px solid #e0e0e0;border-radius:8px;font-size:14px;font-family:inherit;transition:border .3s}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--accent)}
.contact-form button{width:100%;border:none;cursor:pointer;font-family:inherit}

footer{background:var(--dark);color:rgba(255,255,255,.7);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand h3{color:var(--white);font-size:24px;margin-bottom:12px}
.footer-brand span{font-size:12px;opacity:.5;margin-left:6px;letter-spacing:2px}
.footer-links h4{color:var(--white);font-size:14px;margin-bottom:16px}
.footer-links a{display:block;color:rgba(255,255,255,.5);text-decoration:none;font-size:13px;margin-bottom:8px;transition:color .3s}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:12px}

@media(max-width:768px){
  .hamburger{display:block}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--white);flex-direction:column;padding:20px;box-shadow:0 10px 30px rgba(0,0,0,.1);gap:16px}
  .nav-links.active{display:flex}
  .nav-links a{color:var(--dark)}
  .hero-content h1{font-size:32px}
  .hero-stats{gap:24px}
  .hero-stats .stat-num{font-size:24px}
  .about-grid{grid-template-columns:1fr}
  .ai-content{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:60px 0}
  .section-header h2{font-size:28px}
}