/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue-deep:#1a4f9c;
  --blue-main:#2d7ff0;
  --blue-light:#e8f2ff;
  --blue-hover:#1a5fb4;
  --orange:#ff6b35;
  --orange-hover:#e55a2b;
  --bg-gray:#f5f7fa;
  --text-dark:#1a1a2e;
  --text-mid:#555;
  --text-light:#888;
  --border:#e0e6ed;
  --white:#fff;
  --radius:8px;
  --shadow:0 2px 12px rgba(0,0,0,.08);
  --shadow-hover:0 4px 20px rgba(0,0,0,.15);
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text-dark);line-height:1.7;background:var(--white);overflow-x:hidden}
a{color:var(--blue-main);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue-hover)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:var(--white);
  border-bottom:1px solid var(--border);
  box-shadow:0 1px 6px rgba(0,0,0,.04);
}
.header-inner{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;height:64px;
}
.logo{display:flex;align-items:center;gap:8px;font-size:1.25rem;font-weight:700;color:var(--blue-deep)}
.logo svg{width:32px;height:32px;flex-shrink:0}
.logo span{white-space:nowrap}
.main-nav{display:flex;gap:28px;align-items:center}
.main-nav a{color:var(--text-dark);font-size:.95rem;font-weight:500;padding:4px 0;position:relative}
.main-nav a:hover{color:var(--blue-main)}
.main-nav a.active{color:var(--blue-main)}
.main-nav a.active::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--blue-main);border-radius:1px}
.header-phone{display:flex;align-items:center;gap:6px;font-size:1.05rem;font-weight:700;color:var(--orange)}
.header-phone a{color:inherit}
.header-phone svg{width:20px;height:20px}
.mobile-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.mobile-toggle span{display:block;width:22px;height:2px;background:var(--text-dark);margin:4px 0;transition:.3s}

/* ===== Hero ===== */
.hero{
  background:linear-gradient(135deg,var(--blue-deep) 0%,var(--blue-main) 100%);
  color:var(--white);
  padding:60px 20px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;top:0;left:0;right:0;bottom:0;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' opacity='0.06'%3E%3Crect width='100' height='100' fill='none'/%3E%3Cpath d='M10 10h80v80h-80z' fill='none' stroke='white' stroke-width='2'/%3E%3C/svg%3E");
}
.hero-inner{max-width:900px;margin:0 auto;position:relative;z-index:1}
.hero h1{font-size:2.2rem;font-weight:800;margin-bottom:16px;letter-spacing:1px}
.hero p{font-size:1.1rem;opacity:.9;margin-bottom:28px;max-width:680px;margin-left:auto;margin-right:auto}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;border:none;text-decoration:none}
.btn-orange{background:var(--orange);color:var(--white)}
.btn-orange:hover{background:var(--orange-hover);color:var(--white);transform:translateY(-1px);box-shadow:0 4px 12px rgba(255,107,53,.4)}
.btn-outline{background:transparent;color:var(--white);border:2px solid rgba(255,255,255,.6)}
.btn-outline:hover{background:rgba(255,255,255,.1);color:var(--white)}
.btn-blue{background:var(--blue-main);color:var(--white)}
.btn-blue:hover{background:var(--blue-hover);color:var(--white)}

/* ===== Section ===== */
.section{padding:56px 20px}
.section-inner{max-width:1200px;margin:0 auto}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.8rem;font-weight:700;color:var(--text-dark)}
.section-title p{color:var(--text-light);margin-top:8px;font-size:1rem}
.section-title::after{content:"";display:block;width:48px;height:3px;background:var(--blue-main);margin:12px auto 0;border-radius:2px}

/* ===== Categories Grid ===== */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px 16px;text-align:center;transition:all .25s;cursor:pointer;
}
.cat-card:hover{border-color:var(--blue-main);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.cat-card svg{width:48px;height:48px;margin:0 auto 12px;color:var(--blue-main)}
.cat-card h3{font-size:1.05rem;font-weight:600;color:var(--text-dark);margin-bottom:4px}
.cat-card p{font-size:.85rem;color:var(--text-light)}

/* ===== Product Cards ===== */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.prod-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;transition:all .25s;display:flex;flex-direction:column;
}
.prod-card:hover{border-color:var(--blue-main);box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.prod-img{background:var(--blue-light);height:160px;display:flex;align-items:center;justify-content:center}
.prod-img svg{width:64px;height:64px;color:var(--blue-deep);opacity:.7}
.prod-body{padding:14px;flex:1;display:flex;flex-direction:column}
.prod-brand{font-size:.8rem;color:var(--orange);font-weight:600;margin-bottom:4px}
.prod-title{font-size:.95rem;font-weight:600;color:var(--text-dark);margin-bottom:6px;line-height:1.4}
.prod-tags{display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap}
.prod-tag{font-size:.7rem;padding:2px 8px;border-radius:3px;background:var(--blue-light);color:var(--blue-deep)}
.prod-tag.tag-used{background:#fff3e0;color:var(--orange)}
.prod-card .btn{margin-top:auto;align-self:flex-start;font-size:.85rem;padding:8px 18px}

/* ===== Product Detail Page ===== */
.breadcrumb{max-width:1200px;margin:0 auto;padding:16px 20px;font-size:.85rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-mid)}
.breadcrumb span{margin:0 6px}
.prod-detail{max-width:1200px;margin:0 auto;padding:0 20px 40px}
.prod-detail-head{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;margin-bottom:32px;flex-wrap:wrap}
.prod-detail-info{flex:1;min-width:300px}
.prod-detail-info .prod-brand{font-size:.95rem}
.prod-detail-info h1{font-size:1.6rem;font-weight:700;color:var(--text-dark);margin:4px 0 8px}
.prod-detail-info .prod-subtitle{font-size:1rem;color:var(--text-mid);margin-bottom:16px}
.prod-detail-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.prod-detail-tags .prod-tag{font-size:.8rem;padding:4px 12px}
.prod-cta-box{
  background:var(--blue-light);border-radius:var(--radius);padding:24px;
  display:flex;flex-direction:column;gap:12px;max-width:320px;
}
.prod-cta-box .cta-title{font-size:1.1rem;font-weight:700;color:var(--blue-deep)}
.prod-cta-box .cta-phone{font-size:1.4rem;font-weight:800;color:var(--orange)}
.prod-cta-box .cta-phone a{color:inherit}
.prod-cta-box .cta-wechat{font-size:.9rem;color:var(--text-mid)}
.prod-cta-box .btn{width:100%;justify-content:center;margin-top:4px}

/* ===== Specs Table ===== */
.specs-section{margin-bottom:40px}
.specs-section h2{font-size:1.25rem;font-weight:700;margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--blue-main)}
.specs-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.specs-table th{background:var(--blue-deep);color:var(--white);text-align:left;padding:10px 16px;font-weight:500;font-size:.9rem;width:30%}
.specs-table td{padding:10px 16px;border-bottom:1px solid var(--border);font-size:.9rem}
.specs-table tr:last-child td{border-bottom:none}
.specs-table tr:nth-child(even) td{background:var(--bg-gray)}

/* ===== Description Section ===== */
.desc-section{margin-bottom:40px}
.desc-section h2{font-size:1.25rem;font-weight:700;margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--blue-main)}
.desc-section p{margin-bottom:14px;color:var(--text-mid);line-height:1.8}
.desc-section ul{margin:12px 0 12px 20px}
.desc-section li{margin-bottom:6px;color:var(--text-mid);list-style:disc}

/* ===== Related Products ===== */
.related-section{margin-bottom:20px}
.related-section h2{font-size:1.25rem;font-weight:700;margin-bottom:20px;padding-bottom:8px;border-bottom:2px solid var(--blue-main)}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}

/* ===== Services Section ===== */
.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.service-card{text-align:center;padding:24px 16px;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);transition:all .25s}
.service-card:hover{border-color:var(--blue-main);box-shadow:var(--shadow-hover)}
.service-card svg{width:40px;height:40px;margin:0 auto 12px;color:var(--blue-main)}
.service-card h3{font-size:1.05rem;font-weight:600;margin-bottom:6px}
.service-card p{font-size:.85rem;color:var(--text-light)}

/* ===== Contact CTA (Bottom) ===== */
.contact-cta{background:linear-gradient(135deg,var(--blue-deep) 0%,var(--blue-main) 100%);color:var(--white);padding:48px 20px;text-align:center}
.contact-cta-inner{max-width:800px;margin:0 auto}
.contact-cta h2{font-size:1.6rem;font-weight:700;margin-bottom:12px}
.contact-cta p{font-size:1.05rem;opacity:.9;margin-bottom:24px}
.contact-cta .cta-phone-big{font-size:2rem;font-weight:800;margin:16px 0}
.contact-cta .cta-phone-big a{color:var(--white)}

/* ===== About Page ===== */
.about-content{max-width:900px;margin:0 auto;padding:0 20px 40px}
.about-content h1{font-size:1.8rem;font-weight:700;margin-bottom:24px;color:var(--blue-deep)}
.about-content p{margin-bottom:16px;color:var(--text-mid);line-height:1.8}
.about-content h2{font-size:1.25rem;font-weight:600;margin:28px 0 12px;color:var(--text-dark)}

/* ===== Contact Page ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info h2{font-size:1.3rem;font-weight:700;margin-bottom:20px;color:var(--blue-deep)}
.contact-item{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.contact-item svg{width:32px;height:32px;color:var(--blue-main);flex-shrink:0}
.contact-item .ci-label{font-size:.85rem;color:var(--text-light)}
.contact-item .ci-value{font-size:1.05rem;font-weight:600;color:var(--text-dark)}
.contact-item .ci-value a{color:inherit}
.contact-qr{background:var(--blue-light);border-radius:var(--radius);padding:30px;text-align:center}
.contact-qr h3{font-size:1.1rem;font-weight:600;margin-bottom:16px;color:var(--blue-deep)}
.contact-qr .qr-placeholder,.contact-qr .qr-image{
  width:200px;height:200px;margin:0 auto 16px;
  background:var(--white);border:2px dashed var(--blue-main);border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  color:var(--blue-main);font-size:.9rem;text-align:center;padding:12px;
}
.contact-qr .qr-image{border-style:solid;border-width:1px;padding:6px;object-fit:contain}
.contact-qr p{font-size:.85rem;color:var(--text-light)}

/* ===== CTA with QR ===== */
.cta-qr-row{display:flex;align-items:center;justify-content:center;gap:32px;flex-wrap:wrap;margin-top:8px}
.cta-qr{display:flex;flex-direction:column;align-items:center}
.cta-qr img{width:110px;height:110px;background:var(--white);border-radius:8px;padding:4px;display:block;border:1px solid rgba(255,255,255,.3)}
.cta-qr .qr-tip{font-size:.8rem;opacity:.9;margin-top:6px}

/* ===== Footer ===== */
.site-footer{background:var(--text-dark);color:#aaa;padding:40px 20px 20px}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}
.footer-col h4{color:var(--white);font-size:1rem;font-weight:600;margin-bottom:14px}
.footer-col p,.footer-col li{font-size:.85rem;line-height:1.8;margin-bottom:4px}
.footer-col a{color:#aaa}
.footer-col a:hover{color:var(--white)}
.footer-bottom{max-width:1200px;margin:24px auto 0;padding-top:20px;border-top:1px solid #333;text-align:center;font-size:.8rem;color:#666}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .cat-grid,.prod-grid,.related-grid,.services-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .main-nav{display:none}
  .mobile-toggle{display:block}
  .header-phone{font-size:.9rem}
  .header-phone span{display:none}
  .hero h1{font-size:1.6rem}
  .hero p{font-size:.95rem}
  .cat-grid,.prod-grid,.related-grid,.services-grid{grid-template-columns:1fr}
  .prod-detail-head{flex-direction:column}
  .prod-cta-box{max-width:100%}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:20px}
  .section{padding:40px 16px}
  .hero{padding:40px 16px}
}
@media(max-width:480px){
  .hero h1{font-size:1.4rem}
  .hero-btns{flex-direction:column;align-items:center}
  .section-title h2{font-size:1.4rem}
}

/* ===== 公共微信浮窗（全站统一组件） ===== */
.contact-float{position:fixed;right:24px;bottom:24px;z-index:9999;font-family:inherit}
.cf-toggle{width:56px;height:56px;border-radius:50%;border:none;background:linear-gradient(135deg,#07c160,#06ad56);color:#fff;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;box-shadow:0 6px 18px rgba(7,193,96,.4);transition:transform .2s}
.cf-toggle:hover{transform:scale(1.06)}
.cf-toggle svg{width:24px;height:24px;display:block}
.cf-label{font-size:11px;line-height:1;margin-top:1px}
.cf-panel{position:absolute;right:0;bottom:68px;width:200px;background:#fff;border-radius:14px;box-shadow:0 12px 36px rgba(20,40,90,.22);padding:16px 16px 14px;text-align:center;opacity:0;visibility:hidden;transform:translateY(8px);transition:.22s;pointer-events:none;border:1px solid #eef0f6}
.cf-panel.open{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}
.cf-panel-title{font-size:14px;font-weight:700;color:#1a2233;margin-bottom:10px}
.cf-qr{display:flex;justify-content:center;margin-bottom:10px}
.cf-qr img{width:120px;height:120px;border-radius:8px;border:1px solid #eee;background:#fff;display:block}
.cf-btns{display:flex;gap:8px;margin-bottom:8px}
.cf-btns .btn{flex:1;font-size:13px;padding:8px 0;border-radius:8px;text-decoration:none;text-align:center;cursor:pointer;border:none;font-weight:600}
.btn-orange{background:#f97316;color:#fff}
.btn-orange:hover{background:#ea580c}
.btn-blue{background:#2563eb;color:#fff}
.btn-blue:hover{background:#1d4ed8}
.cf-tip{font-size:12px;color:#6b7280}
.cf-copied{font-size:12px;color:#07c160;margin-top:6px;font-weight:600}
@media(max-width:768px){
  .contact-float{right:14px;bottom:14px}
  .cf-toggle{width:50px;height:50px}
  .cf-panel{width:186px}
}