/* 基础重置 */
* {box-sizing: border-box;margin:0;padding:0}
html {scroll-behavior: smooth}
body {font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial; color:#222; line-height:1.5}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.site-header{position:fixed;top:0;left:0;right:0;background:rgba(255,255,255,0.9);backdrop-filter:blur(6px);border-bottom:1px solid rgba(0,0,0,0.05);z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px;font-weight:700}
.brand .logo{height:40px;width:auto;display:block}
.brand .brand-text{font-weight:700;font-size:0.95rem}
.nav a{margin-left:16px;color:#333;text-decoration:none}
.nav a:hover{color:#0077cc}

/* Hero */
.hero{height:60vh;background-image:url('images/bg.jpg');background-size:cover;background-position:center;display:flex;align-items:center}
.hero-overlay{background:rgba(0,0,0,0.4);color:#fff;padding:40px;border-radius:8px;margin-left:16px}
.hero h1{font-size:2rem;margin-bottom:8px}
.hero p{opacity:0.95;margin-bottom:12px}
.btn{display:inline-block;background:#0077cc;color:#fff;padding:10px 18px;border-radius:4px;text-decoration:none}

/* Sections */
.section{padding:80px 0}
.section h2{margin-bottom:18px}

/* 产品网格 */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.card{background:#fff;border:1px solid #eee;border-radius:8px;overflow:hidden;box-shadow:0 2px 6px rgba(0,0,0,0.03)}
.card img{width:100%;height:180px;object-fit:cover;display:block;cursor:pointer}
.card .card-body{padding:12px}
.card .name{font-weight:600;margin-bottom:8px}
.card .price{color:#0077cc}

/* about */
.about .contact{margin-top:12px;padding:12px;border-left:3px solid #0077cc;background:#fbfbff}

/* Footer */
.site-footer{padding:16px;text-align:center;color:#777;border-top:1px solid #eee}

/* Lightbox 模态 */
.lightbox{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,0.75);z-index:200}
.lightbox[aria-hidden="false"]{display:flex}
.lightbox-img{max-width:90%;max-height:80%;border-radius:6px}
.lightbox-close{position:absolute;top:18px;right:18px;background:transparent;border:0;color:#fff;font-size:28px;cursor:pointer}
.lightbox-caption{color:#fff;margin-top:12px;text-align:center}

/* 响应式 */
@media (max-width:600px){
  .hero{height:40vh}
  .hero-overlay{padding:16px;margin:8px}
  .card img{height:160px}
  .brand .brand-text{display:none}
  .brand .logo{height:34px}
}