*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#333;line-height:1.7;background:#fafafa}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{text-decoration:none;color:inherit}
img{max-width:100%}

/* Nav */
nav{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.06);position:sticky;top:0;z-index:100}
.nav-inner{display:flex;justify-content:space-between;align-items:center;height:64px}
.logo{font-size:1.3rem;font-weight:700;color:#1a1a2e;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;gap:32px}
.nav-links a{color:#555;font-size:.95rem;transition:color .2s}
.nav-links a:hover{color:#667eea}

/* Hero */
.hero{padding:80px 0 60px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;text-align:center}
.hero h1{font-size:2.5rem;margin-bottom:16px;font-weight:700}
.hero p{font-size:1.15rem;opacity:.9;max-width:600px;margin:0 auto 32px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 32px;border-radius:8px;font-weight:500;transition:all .25s;font-size:1rem}
.btn-primary{background:#fff;color:#667eea}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.15)}
.btn-outline{border:2px solid #fff;color:#fff}
.btn-outline:hover{background:#fff;color:#667eea}

/* Sections */
section{padding:70px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:2rem;color:#1a1a2e;margin-bottom:12px}
.section-title p{color:#666;font-size:1rem}

/* About */
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-top:40px}
.about-card{background:#fff;padding:30px;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.05);text-align:center;transition:transform .25s}
.about-card:hover{transform:translateY(-5px)}
.about-card .icon{font-size:2.5rem;margin-bottom:16px}
.about-card h3{font-size:1.2rem;margin-bottom:10px;color:#1a1a2e}
.about-card p{color:#666;font-size:.95rem}

/* Products Grid */
.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:30px}
.product-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s}
.product-card:hover{transform:translateY(-8px);box-shadow:0 12px 40px rgba(0,0,0,.12)}
.product-card-header{padding:30px 30px 20px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}
.product-card-header h3{font-size:1.5rem;margin-bottom:8px}
.product-card-header p{opacity:.9;font-size:.95rem}
.product-card-body{padding:24px 30px 30px}
.product-features{list-style:none;margin-bottom:24px}
.product-features li{padding:8px 0;color:#555;font-size:.95rem;border-bottom:1px solid #f0f0f0}
.product-features li:last-child{border-bottom:none}
.product-card-footer{display:flex;gap:12px;flex-wrap:wrap}
.btn-sm{padding:10px 20px;font-size:.9rem;border-radius:8px}
.btn-accent{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}
.btn-accent:hover{opacity:.9}
.btn-light{background:#f5f5f7;color:#333}
.btn-light:hover{background:#e8e8ea}

/* Product detail page */
.product-hero{padding:60px 0;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff}
.product-hero h1{font-size:2.5rem;margin-bottom:12px}
.product-hero .slogan{font-size:1.2rem;opacity:.9;margin-bottom:20px}
.product-hero .meta{display:flex;gap:24px;font-size:.9rem;opacity:.85;flex-wrap:wrap}
.product-content{background:#fff;border-radius:16px;padding:50px;margin-top:-40px;position:relative;box-shadow:0 -4px 20px rgba(0,0,0,.06)}
.product-content h2{font-size:1.6rem;margin:30px 0 16px;color:#1a1a2e}
.product-content h2:first-child{margin-top:0}
.feature-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.feature-item{padding:20px;background:#f9fafb;border-radius:10px}
.feature-item h4{font-size:1.05rem;margin-bottom:8px;color:#1a1a2e}
.feature-item p{font-size:.9rem;color:#666}
.scene-tags{display:flex;flex-wrap:wrap;gap:10px}
.scene-tag{padding:8px 18px;background:#f0f4ff;color:#667eea;border-radius:20px;font-size:.9rem}
.download-section{text-align:center;padding:50px 0 30px}
.download-section h2{margin-bottom:20px}
.download-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:24px}
.download-info{color:#888;font-size:.85rem}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-top:40px}
.contact-card{background:#fff;padding:30px;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.05);text-align:center}
.contact-card .icon{font-size:2rem;margin-bottom:12px}
.contact-card h4{font-size:1.1rem;margin-bottom:8px;color:#1a1a2e}
.contact-card p{color:#666;font-size:.95rem}

/* Footer */
footer{background:#1a1a2e;color:#fff;padding:40px 0 20px}
.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{font-size:1rem;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px;font-size:.9rem;opacity:.7}
.footer-col ul li a:hover{opacity:1}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;opacity:.6}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.9rem;color:#888}
.breadcrumb a{color:#667eea}
.breadcrumb span{margin:0 8px}

/* Responsive */
@media(max-width:768px){
  .hero h1{font-size:1.8rem}
  .hero{padding:50px 0 40px}
  section{padding:50px 0}
  .product-content{padding:30px 20px}
  .product-hero h1{font-size:1.8rem}
  .nav-links{gap:16px;font-size:.85rem}
}