:root{--primary:#1a5cff;--primary-dark:#0d3fb8;--primary-light:#e8efff;--text:#333;--text-light:#666;--text-muted:#999;--bg:#fff;--bg-gray:#f7f8fa;--bg-dark:#1e2a3a;--border:#e5e7eb;--shadow:0 2px 12px rgba(0,0,0,.08);--shadow-hover:0 6px 24px rgba(0,0,0,.12);--radius:8px;--max-width:1200px;--header-height:80px;--transition:all .3s ease}*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);line-height:1.6;background:var(--bg)}a{color:inherit;text-decoration:none;transition:var(--transition)}img{max-width:100%;height:auto;display:block}ul,ol{list-style:none}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3}p{line-height:1.8}.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}.section{padding:80px 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a.active{background:var(--primary);color:#fff}.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.product-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition)}.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}.product-card .card-img{width:100%;height:200px;overflow:hidden}.product-card .card-img img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}.product-card:hover .card-img img{transform:scale(1.05)}.product-card .card-body{padding:20px}.product-card .card-body h3{font-size:16px;margin-bottom:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.product-card .card-body 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(max-width:480px){.product-grid{grid-template-columns:1fr}.news-grid{grid-template-columns:1fr}.case-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:repeat(2,1fr)}.banner-slider{height:240px}.page-banner{height:180px}.page-banner .banner-overlay h1{font-size:22px}.category-tabs{gap:6px}.category-tabs a{padding:6px 16px;font-size:13px}.product-detail .gallery .main-img{height:240px}.product-detail .gallery .thumb-list .thumb{width:60px;height:60px}.float-buttons{display:none}}