/* ============================================
   Product Portal - Styles
   (Copied from project style.css for index module)
   Mobile-first responsive design
   ============================================ */

:root {
  --primary: #1a1a2e;
  --accent: #d4a853;
  --accent-hover: #c4963e;
  --accent-light: #f5ecd7;
  --text: #2d3436;
  --text-light: #636e72;
  --text-muted: #b2bec3;
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --border: #e9ecef;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1280px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{cursor:pointer;font-family:inherit;border:none}
ul{list-style:none}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.25}

.section-tag{display:inline-block;font-size:0.8rem;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.section-title{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:700;color:var(--primary);margin-bottom:12px}
.section-subtitle{font-size:1.05rem;color:var(--text-light);max-width:600px;line-height:1.7}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow var(--transition)}
.site-header.scrolled{box-shadow:var(--shadow)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-size:1.5rem;font-weight:800;color:var(--primary);display:flex;align-items:center;gap:8px}
.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--accent),#e8c567);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:#fff}
.back-link{font-size:0.9rem;font-weight:500;color:var(--accent);transition:color var(--transition)}
.back-link:hover{color:var(--accent-hover)}

/* Hero */
.hero{position:relative;background:linear-gradient(135deg,var(--primary) 0%,#0f3460 50%,#1a1a2e 100%);color:#fff;padding:100px 0 80px;overflow:hidden;text-align:center}
.hero::before{content:"";position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(212,168,83,0.15) 0%,transparent 70%);border-radius:50%}
.hero::after{content:"";position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(212,168,83,0.1) 0%,transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:1}
.hero-title{font-size:clamp(2rem,5vw,3.4rem);font-weight:800;line-height:1.15;margin-bottom:20px;letter-spacing:-0.5px}
.hero-title span{color:var(--accent)}
.hero-subtitle{font-size:clamp(1rem,2vw,1.15rem);color:rgba(255,255,255,0.7);max-width:650px;margin:0 auto;line-height:1.7}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:50px;font-weight:600;font-size:0.95rem;transition:all var(--transition);white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 25px rgba(212,168,83,0.4)}
.btn-sm{padding:10px 20px;font-size:0.85rem}

/* Products Section */
.products-section{padding:80px 0;background:var(--bg-alt)}
.products-header{text-align:center;margin-bottom:48px}

/* Category Filter */
.category-filter{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:24px}
.cat-btn{padding:10px 22px;border-radius:50px;font-size:0.85rem;font-weight:500;background:#fff;color:var(--text-light);border:1px solid var(--border);transition:all var(--transition);display:inline-block}
.cat-btn:hover{border-color:var(--accent);color:var(--accent)}
.cat-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Product Grid */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.product-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:all var(--transition);display:block}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.product-image{position:relative;aspect-ratio:1/1;overflow:hidden;background:#f5f5f5}
.product-image img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease}
.product-card:hover .product-image img{transform:scale(1.06)}
.product-body{padding:20px}
.product-category-label{font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:1.5px;color:var(--accent);margin-bottom:4px}
.product-name{font-size:1.05rem;font-weight:600;color:var(--primary);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.product-price{font-size:1.3rem;font-weight:700;color:var(--primary)}
.product-view-count{font-size:0.78rem;color:var(--text-muted)}
.product-actions{display:flex;gap:10px}
.product-actions .btn{flex:1;justify-content:center}

/* No Results */
.no-results{text-align:center;padding:60px 20px;grid-column:1/-1}
.no-results p{color:var(--text-light);font-size:1.1rem}

/* Pagination */
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:48px;flex-wrap:wrap}
.page-btn{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 14px;border-radius:8px;font-size:0.9rem;font-weight:500;color:var(--text-light);background:#fff;border:1px solid var(--border);transition:all var(--transition)}
.page-btn:hover{border-color:var(--accent);color:var(--accent)}
.page-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.page-btn.disabled{color:var(--text-muted);pointer-events:none;opacity:0.5}

/* ============ DETAIL PAGE ============ */
.detail-section{padding:40px 0 80px}
.detail-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}

/* Gallery */
.gallery{position:sticky;top:88px}
.gallery-main{position:relative;border-radius:var(--radius);overflow:hidden;background:#f5f5f5;aspect-ratio:1/1;margin-bottom:12px}
.gallery-main img{width:100%;height:100%;object-fit:cover;transition:opacity 0.4s ease}
.gallery-nav-btn{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,0.9);display:flex;align-items:center;justify-content:center;transition:all var(--transition);z-index:2;box-shadow:var(--shadow-sm)}
.gallery-nav-btn:hover{background:#fff;box-shadow:var(--shadow)}
.gallery-nav-btn.prev{left:12px}
.gallery-nav-btn.next{right:12px}
.gallery-nav-btn svg{width:20px;height:20px;color:var(--primary)}
.gallery-dots{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:2}
.gallery-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,0.5);cursor:pointer;transition:all var(--transition)}
.gallery-dot.active{background:#fff;transform:scale(1.3)}
.gallery-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.gallery-thumb{aspect-ratio:1/1;border-radius:var(--radius-sm);overflow:hidden;cursor:pointer;border:2px solid transparent;transition:all var(--transition);background:#f5f5f5}
.gallery-thumb:hover,.gallery-thumb.active{border-color:var(--accent)}
.gallery-thumb img{width:100%;height:100%;object-fit:cover}

/* Product Info */
.product-info{padding-top:8px}
.product-info .product-category-label{font-size:0.78rem}
.product-info h1{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:var(--primary);margin:8px 0 16px;line-height:1.3}
.detail-price-row{display:flex;align-items:center;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.detail-price{font-size:2rem;font-weight:700;color:var(--primary)}
.detail-stats{display:flex;align-items:center;gap:16px;margin-bottom:24px;flex-wrap:wrap;font-size:0.85rem;color:var(--text-muted)}
.detail-stats span{display:inline-flex;align-items:center;gap:4px}
.detail-divider{border:none;border-top:1px solid var(--border);margin:24px 0}

/* Tab 切换：详情描述一个区块 */
.detail-block h3{font-size:1.05rem;font-weight:600;color:var(--primary);margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid var(--accent);display:inline-block}
.detail-block{margin-bottom:28px}
.detail-block .desc{color:var(--text-light);line-height:1.8;font-size:0.95rem}
.specs-table{width:100%;border-collapse:collapse}
.specs-table tr{border-bottom:1px solid var(--border)}
.specs-table tr:last-child{border-bottom:none}
.specs-table td{padding:12px 0;font-size:0.93rem}
.specs-table td:first-child{font-weight:600;color:var(--primary);width:40%}
.specs-table td:last-child{color:var(--text-light)}

/* Contact Card */
.contact-card{background:var(--bg-alt);border-radius:var(--radius);padding:24px;margin-top:24px}
.contact-card h4{font-size:1rem;font-weight:600;margin-bottom:16px;color:var(--primary)}
.contact-buttons{display:flex;gap:12px;flex-wrap:wrap}
.btn-contact{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:50px;font-weight:600;font-size:0.88rem;transition:all var(--transition);justify-content:center;min-width:140px}
.btn-whatsapp{background:#25d366;color:#fff}
.btn-whatsapp:hover{background:#1fb855;box-shadow:0 6px 20px rgba(37,211,102,0.35)}
.contact-buttons svg{width:18px;height:18px;fill:currentColor}

/* ============ RESPONSIVE ============ */
@media (max-width:1024px){
  .detail-layout{grid-template-columns:1fr;gap:32px}
  .gallery{position:static}
}
@media (max-width:768px){
  .hero{padding:70px 0 50px}
  .product-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
  .detail-layout{gap:24px}
}
@media (max-width:480px){
  .product-grid{grid-template-columns:1fr}
  .gallery-thumbs{gap:6px}
}