:root{--bg:#fff;--bg-alt:#f8f9fa;--text:#1a1a2e;--text-muted:#6b7280;--primary:#c41e3a;--primary-light:#fee2e2;--accent:#f59e0b;--border:#e5e7eb;--radius:12px;--max-w:1200px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body,html{font-family:PingFang SC,Microsoft YaHei,Helvetica Neue,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}.site-header{border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;background:var(--bg);z-index:100}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{font-size:20px;font-weight:700;color:var(--primary);white-space:nowrap}.nav-desktop{display:flex;gap:32px}.nav-desktop a{font-size:15px;color:var(--text-muted)}.nav-desktop a.active{color:var(--primary);font-weight:600;border-bottom:2px solid var(--primary);padding-bottom:2px}.nav-hamburger{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--text);padding:8px}.nav-mobile{display:none;background:var(--bg);border-bottom:1px solid var(--border);padding:8px 0;box-shadow:0 4px 12px rgba(0,0,0,.1)}.nav-mobile a{display:block;padding:14px 24px;font-size:16px;color:var(--text);border-left:3px solid transparent}.nav-mobile a.act{color:var(--primary);font-weight:600;background:#fff5f5;border-left-color:var(--primary)}.hero{background:linear-gradient(135deg,#fff5f5,#fff 60%);padding:100px 0 80px;text-align:center}.hero-badge{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;padding:4px 16px;border-radius:20px;margin-bottom:24px}.hero h1{font-size:48px;font-weight:800;margin-bottom:16px;letter-spacing:-1px}.hero p{font-size:18px;color:var(--text-muted);max-width:520px;margin:0 auto 40px;line-height:1.8}.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.btn{display:inline-block;padding:12px 32px;border-radius:8px;font-weight:600;font-size:15px;cursor:pointer}.btn-primary{background:var(--primary);color:#fff}.btn-outline{border:1px solid var(--border);color:var(--text)}.btn-primary:hover{background:#a01830}.btn-outline:hover{background:var(--bg-alt)}.section{padding:80px 0}.section-alt{background:var(--bg-alt)}.section-title{text-align:center;margin-bottom:48px}.section-title h2{font-size:32px;font-weight:700;margin-bottom:12px}.section-title p{color:var(--text-muted)}.page-head{background:linear-gradient(135deg,#fff5f5,#fff 60%);padding:60px 0 48px;text-align:center}.page-head h1{font-size:36px;font-weight:800;margin-bottom:12px}.page-head p{color:var(--text-muted);font-size:16px}.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:24px;gap:24px;list-style:none;padding:0}.cat-card{display:block;background:var(--bg-alt);border-radius:var(--radius);padding:32px 24px;border:1px solid var(--border);transition:box-shadow .2s}.cat-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.08)}.cat-card .icon{font-size:36px;margin-bottom:16px}.cat-card h3{font-size:17px;font-weight:700;margin-bottom:8px}.cat-card p{font-size:14px;color:var(--text-muted);line-height:1.6}.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:24px;gap:24px}.prod-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .2s}.prod-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.08)}.prod-img{aspect-ratio:1/1;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;font-size:56px;overflow:hidden}.prod-img img{width:100%;height:100%;object-fit:cover}.prod-info{padding:20px 20px 24px}.prod-info .row{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:8px}.prod-info h3{font-size:17px;font-weight:700}.prod-tag{background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:600;padding:2px 10px;border-radius:12px}.prod-specs{font-size:14px;color:var(--text-muted);line-height:1.8}.filter-nav{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:20px}.filter-nav a{padding:6px 16px;border-radius:20px;font-size:13px;font-weight:600;background:var(--bg-alt);color:var(--text-muted);border:1px solid var(--border)}.filter-nav a.active,.filter-nav a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:32px;gap:32px;list-style:none;padding:0}.feat-card{text-align:center}.feat-card .dot{width:56px;height:56px;background:var(--primary-light);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:24px}.feat-card h3{font-size:17px;font-weight:700;margin-bottom:8px}.feat-card p{font-size:14px;color:var(--text-muted);line-height:1.7}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:24px;gap:24px;list-style:none;padding:0}.stat-card{text-align:center;background:var(--bg);border-radius:var(--radius);padding:32px 16px;border:1px solid var(--border)}.stat-card .num{font-size:28px;font-weight:800;color:var(--primary);margin-bottom:8px;white-space:nowrap}.stat-card .lbl{font-size:14px;color:var(--text-muted)}.cert-row{gap:24px;flex-wrap:wrap;list-style:none;padding:0}.cert-badge,.cert-row{display:flex;justify-content:center}.cert-badge{width:140px;height:80px;background:var(--bg-alt);border-radius:8px;align-items:center;border:1px solid var(--border);font-weight:700;font-size:16px;color:var(--text-muted)}.about-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:64px;gap:64px;align-items:center}.about-grid h2{font-size:28px;font-weight:700;margin-bottom:20px}.about-grid p{color:var(--text-muted);line-height:1.9;margin-bottom:16px}.about-img{background:var(--bg-alt);border-radius:16px;height:320px;display:flex;align-items:center;justify-content:center;font-size:80px;margin:0}.contact-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:64px;gap:64px}.contact-grid h2{font-size:22px;font-weight:700;margin-bottom:24px}.contact-list{display:flex;flex-direction:column;gap:20px}.contact-list .kv{display:flex;gap:16px}.contact-list dt{width:80px;font-size:14px;color:var(--text-muted);flex-shrink:0}.contact-list dd{font-size:14px;font-weight:500}.contact-widget{margin-top:40px;background:var(--bg-alt);border-radius:var(--radius);padding:24px;border:1px solid var(--border)}.contact-widget h3{font-weight:700;font-size:16px;margin-bottom:12px}.contact-widget p{font-size:14px;color:var(--text-muted);margin-bottom:16px;line-height:1.7}.form{display:flex;flex-direction:column;gap:16px}.form label{display:block;font-size:14px;font-weight:500;margin-bottom:6px}.form input,.form select,.form textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;outline:none;background:var(--bg)}.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.form textarea{resize:vertical}.form-success{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:var(--radius);padding:32px;text-align:center}.form-success .chk{font-size:36px;margin-bottom:12px}.form-success strong{display:block;font-size:18px;margin-bottom:8px}.prod-detail{display:grid;grid-template-columns:1fr 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a{color:var(--primary);text-decoration:underline}.qr-card{margin-top:24px;padding:16px;background:var(--bg-alt);border-radius:8px;display:inline-flex;align-items:center;gap:14px}.qr-card img{width:80px;height:80px;border-radius:4px}.qr-card .hint{font-size:13px;color:var(--text-muted);line-height:1.6}.video-wrap{border-radius:16px;overflow:hidden;background:#000;aspect-ratio:16/9;margin-top:24px}.video-wrap video{width:100%;height:100%}.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:40px 0 24px;margin-top:80px}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:32px;gap:32px;margin-bottom:32px}.footer-grid h4{font-size:16px;font-weight:700;margin-bottom:12px}.footer-grid .brand-name h4{color:var(--primary)}.footer-grid ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}.footer-grid a,.footer-grid div,.footer-grid li{font-size:14px;color:var(--text-muted);line-height:2}.footer-bottom{border-top:1px solid var(--border);padding-top:20px;text-align:center;font-size:13px}.footer-bottom,.footer-bottom a{color:var(--text-muted)}.chat-btn{position:fixed;bottom:20px;right:20px;z-index:2147483647;width:56px;height:56px;border-radius:50%;border:none;background:var(--primary);color:#fff;cursor:pointer;font-size:24px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(0,0,0,.2);transition:transform .2s}.chat-btn:active{transform:scale(.9)}.chat-overlay{display:none}.chat-box{position:fixed;z-index:2147483646;right:20px;bottom:90px;width:380px;height:520px;border-radius:12px;overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,.25);background:#fff;transition:bottom .2s}.chat-box iframe{width:100%;height:100%;border:none}@media (max-width:768px){.container{padding:0 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