/* ============================================================
   NLHB Bearings — Site-wide CSS (本地完整站共用)
   配色: navy #0F172A + blue #0369A1
   字体: Lexend (标题) + Source Sans 3 (正文)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Lexend:wght@400;500;600;700&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

:root{
  --navy:#0F172A;
  --blue:#0369A1;
  --blue-dark:#075985;
  --blue-light:#E0F2FE;
  --blue-faint:#F0F9FF;
  --bg-primary:#FFFFFF;
  --bg-secondary:#F8FAFC;
  --bg-muted:#F1F5F9;
  --text:#0F172A;
  --text-2:#334155;
  --text-muted:#94A3B8;
  --border:#E2E8F0;
  --radius-card:12px;
  --radius-btn:8px;
  --font-display:'Lexend',system-ui,sans-serif;
  --font-body:'Source Sans 3',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font-body);color:var(--text);background:var(--bg-primary);line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);line-height:1.2;font-weight:700}
p{font-family:var(--font-body)}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{display:block;max-width:100%;height:auto}
ul{list-style:none}

.wrap{max-width:1280px;margin:0 auto;padding:0 80px}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--blue);line-height:1.2}
.eyebrow--light{color:#7DD3FC}
.section-title{font-size:32px;font-weight:700;text-align:center;line-height:1.2}
.section-title--light{color:#fff}
.section-sub{font-size:17px;color:var(--text-2);text-align:center;max-width:760px;margin:12px auto 0;line-height:1.5}
.link{font-weight:600;font-size:15px;color:var(--blue);display:inline-block}

.btn{display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-body);font-weight:600;cursor:pointer;border:none;border-radius:var(--radius-btn);transition:background .2s,transform .2s;text-decoration:none;line-height:1}
.btn--primary{background:var(--blue);color:#fff}
.btn--primary:hover{background:var(--blue-dark);text-decoration:none;color:#fff}
.btn--ghost{background:transparent;color:var(--navy);border:1.5px solid var(--border)}
.btn--ghost:hover{border-color:var(--blue);color:var(--blue);text-decoration:none}
.btn--ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.3)}
.btn--ghost-light:hover{border-color:#fff;text-decoration:none;color:#fff}

.section{width:100%;padding:72px 0}
.section--white{background:var(--bg-primary)}
.section--muted{background:var(--bg-secondary)}
.section--navy{background:var(--navy);color:#fff}
.section--navy h1,.section--navy h2,.section--navy h3{color:#fff}
.section--navy p{color:#CBD5E1}

.card{background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-card);transition:border-color .2s,box-shadow .2s}
.card:hover{border-color:var(--blue);box-shadow:0 4px 6px rgba(0,0,0,.07)}

/* Header (所有页面共用) */
.header{height:72px;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 48px;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.logo-wrap{display:flex;flex-direction:column;gap:0;text-decoration:none;line-height:1}
.logo-wrap:hover{text-decoration:none}
.logo-text{font-family:var(--font-display);font-weight:700;font-size:24px;letter-spacing:-.02em;color:var(--navy);line-height:1}
.logo-sub{font-family:var(--font-display);font-weight:600;font-size:11px;letter-spacing:.3em;color:var(--blue);text-transform:uppercase;margin-top:5px;line-height:1}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:15px;color:var(--text-2)}
.nav-links a:hover{color:var(--blue)}
.nav-links a.active{color:var(--text);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-quote{height:40px;padding:0 20px}

/* Footer (所有页面共用) */
.footer{background:var(--navy);padding:64px 80px 32px;display:flex;flex-direction:column;gap:48px}
.footer-main{display:flex;justify-content:space-between;gap:64px;flex-wrap:wrap}
.footer-brand{width:340px;display:flex;flex-direction:column;gap:16px}
.footer-logo-row{display:flex;flex-direction:column;gap:0;line-height:1}
.footer-logo-text{font-family:var(--font-display);font-weight:700;font-size:22px;letter-spacing:-.02em;color:#fff;line-height:1}
.footer-logo-sub{font-family:var(--font-display);font-weight:600;font-size:10px;letter-spacing:.3em;color:#7DD3FC;text-transform:uppercase;margin-top:5px;line-height:1}
.footer-tagline{font-size:14px;color:var(--text-muted);line-height:1.6}
.footer-cols{display:flex;gap:64px;flex-wrap:wrap}
.footer-col{display:flex;flex-direction:column;gap:12px;min-width:170px}
.footer-col .head{font-size:12px;font-weight:600;color:#fff;letter-spacing:.06em}
.footer-col a{font-size:14px;color:var(--text-muted);line-height:1.5}
.footer-col a:hover{color:#fff}
.footer-bar{display:flex;justify-content:space-between;align-items:center;padding-top:20px;border-top:1px solid rgba(51,65,85,.6);flex-wrap:wrap;gap:16px}
.footer-bar span{font-size:13px;color:#64748B}

/* Hero (内页用，比首页 Hero 小) */
.page-hero{background:var(--navy);padding:64px 80px;text-align:center}
.page-hero h1{font-size:40px;color:#fff;margin-bottom:16px}
.page-hero p{font-size:18px;color:#CBD5E1;max-width:680px;margin:0 auto;line-height:1.6}
.page-hero .breadcrumb{font-size:14px;color:var(--text-muted);margin-bottom:24px}
.page-hero .breadcrumb a{color:#7DD3FC}

/* 表单 */
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px}
.form-group label .req{color:#DC2626}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;font-family:var(--font-body);font-size:15px;background:#fff;color:var(--text)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(3,105,161,.1)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-grid .full{grid-column:1/-1}
.form-hint{font-size:13px;color:var(--text-muted);margin-top:4px}

@media (max-width:1024px){
  .wrap{padding:0 40px}
  .form-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .wrap,.footer{padding-left:24px;padding-right:24px}
  .header{
    height:auto;
    min-height:72px;
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    align-items:center;
    row-gap:10px;
    padding:12px 20px 0;
  }
  .nav-links{
    grid-column:1/-1;
    grid-row:2;
    display:flex;
    gap:22px;
    width:100%;
    padding:10px 0 12px;
    overflow-x:auto;
    border-top:1px solid var(--border);
    white-space:nowrap;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{flex:0 0 auto;font-size:14px}
  .nav-actions{justify-self:end}
  .nav-quote{height:38px;padding:0 14px;font-size:14px}
  .tools-grid{grid-template-columns:1fr!important}
  .section{padding:48px 0}
  .section-title{font-size:26px}
  .page-hero{padding:48px 24px}
  .page-hero h1{font-size:30px}
}
@media (max-width:420px){
  .header{padding-left:16px;padding-right:16px}
  .nav-actions{gap:8px}
  .nav-actions>a:not(.nav-quote){font-size:14px!important}
  .nav-quote{padding:0 12px;font-size:13px}
}

/* ===== 悬浮按钮：WhatsApp + 返回顶部 ===== */
.float-buttons{position:fixed;right:24px;bottom:24px;z-index:999;display:flex;flex-direction:column;gap:12px}
.float-btn{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;border:none;box-shadow:0 4px 12px rgba(15,23,42,.15);transition:transform .2s,box-shadow .2s;text-decoration:none}
.float-btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(15,23,42,.25);text-decoration:none}
.float-whatsapp{background:#25D366}
.float-whatsapp svg{width:28px;height:28px;fill:#fff}
.float-top{background:var(--navy);opacity:0;pointer-events:none;transition:opacity .3s}
.float-top.show{opacity:1;pointer-events:auto}
.float-top svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:640px){.float-buttons{right:16px;bottom:16px}.float-btn{width:46px;height:46px}}

/* ===== FAQ 折叠 ===== */
.faq-item{background:#fff;border:1px solid var(--border);border-radius:8px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:20px 24px;font-size:16px;font-weight:600;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q:hover{color:var(--blue)}
.faq-q .faq-icon{font-size:20px;color:var(--text-muted);transition:transform .2s;flex-shrink:0}
.faq-item.open .faq-q .faq-icon{transform:rotate(45deg)}
.faq-a{display:none;padding:0 24px 20px;font-size:15px;color:var(--text-2);line-height:1.7}

/* ===== 认证/信任栏 ===== */
.trust-bar{display:flex;justify-content:center;gap:48px;flex-wrap:wrap;padding:32px 0}
.trust-item{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}
.trust-badge{width:80px;height:80px;border-radius:50%;background:var(--bg-muted);display:flex;align-items:center;justify-content:center;border:2px dashed var(--border);color:var(--text-muted);font-size:11px;text-align:center;padding:8px}
.trust-label{font-size:13px;color:var(--text-2);font-weight:500}

/* ===== 客户评价 ===== */
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testimonial-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);padding:28px;display:flex;flex-direction:column;gap:12px}
.testimonial-stars{color:#F59E0B;font-size:16px;letter-spacing:2px}
.testimonial-text{font-size:15px;color:var(--text);line-height:1.7;font-style:italic;flex:1}
.testimonial-author{font-size:14px;color:var(--text-2)}
.testimonial-author strong{color:var(--text);display:block;font-style:normal}
@media(max-width:1024px){.testimonial-grid{grid-template-columns:1fr}}

/* ===== 产品页型号搜索 ===== */
.model-search-box{display:flex;gap:12px;margin-bottom:24px}
.model-search-box input{flex:1;padding:14px 18px;border:2px solid var(--border);border-radius:8px;font-size:15px;font-family:var(--font-body)}
.model-search-box input:focus{outline:none;border-color:var(--blue)}
.model-search-box button{padding:0 24px;background:var(--blue);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;font-size:14px;white-space:nowrap}
.model-search-box button:hover{background:var(--blue-dark)}

/* 型号表里的品牌互换标签 */
.model-table td .brand-tags{display:block;font-size:11px;color:var(--text-muted);margin-top:2px;font-family:var(--font-body);font-weight:400}

/* ===== Product series photography ===== */
.series-card .series-photo{
  position:relative;
  height:210px;
  margin:-24px -24px 14px;
  overflow:hidden;
  border-radius:calc(var(--radius-card) - 1px) calc(var(--radius-card) - 1px) 0 0;
  border-bottom:1px solid var(--border);
  background:
    radial-gradient(circle at 50% 34%,rgba(255,255,255,.98) 0,rgba(248,250,252,.96) 46%,rgba(226,232,240,.72) 100%);
}
.series-card .series-photo img{
  display:block;
  width:100%;
  height:100%;
  object-fit:contain;
  padding:10px 18px 16px;
  transition:transform .35s ease;
}
.series-card:hover .series-photo img{transform:scale(1.025)}
.series-card .series-photo figcaption{
  position:absolute;
  right:12px;
  bottom:10px;
  padding:4px 8px;
  border:1px solid rgba(148,163,184,.28);
  border-radius:999px;
  background:rgba(255,255,255,.86);
  color:#64748B;
  font-size:10px;
  font-weight:600;
  line-height:1;
  letter-spacing:.04em;
  text-transform:uppercase;
  backdrop-filter:blur(6px);
}
@media(max-width:768px){
  .series-card .series-photo{height:180px}
  .cat-hero > .cat-gallery,
  .cat-hero > .cat-hero-text{
    width:100%;
    min-width:0;
  }
  .cat-hero > .cat-gallery{max-width:100%}
  .cat-hero > .cat-gallery > .cat-gallery-main{
    width:100%;
    max-width:100%;
  }
}
/* ===== 询价篮子 Inquiry Cart ===== */
.inquiry-fab{position:fixed;left:24px;bottom:24px;z-index:998;background:var(--blue);color:#fff;border-radius:28px;padding:0 20px;height:52px;display:flex;align-items:center;gap:10px;cursor:pointer;box-shadow:0 4px 12px rgba(3,105,161,.35);font-weight:600;font-size:14px;border:none;opacity:0;pointer-events:none;transition:opacity .3s,transform .2s;font-family:var(--font-body)}
.inquiry-fab.show{opacity:1;pointer-events:auto}
.inquiry-fab:hover{transform:translateY(-2px);background:var(--blue-dark)}
.inquiry-fab .cart-count{background:#fff;color:var(--blue);border-radius:50%;width:22px;height:22px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.inquiry-panel{position:fixed;left:24px;bottom:88px;z-index:997;background:#fff;border:1px solid var(--border);border-radius:12px;width:340px;max-height:480px;display:none;flex-direction:column;box-shadow:0 8px 24px rgba(15,23,42,.18);overflow:hidden}
.inquiry-panel.show{display:flex}
.inquiry-head{padding:16px 20px;background:var(--navy);color:#fff;display:flex;justify-content:space-between;align-items:center}
.inquiry-head h3{color:#fff;font-size:16px;margin:0}
.inquiry-head .clear{color:#94A3B8;font-size:12px;cursor:pointer;background:none;border:none;font-family:var(--font-body)}
.inquiry-head .clear:hover{color:#fff}
.inquiry-list{flex:1;overflow-y:auto;padding:8px 0;max-height:280px}
.inquiry-empty{padding:32px 20px;text-align:center;color:var(--text-muted);font-size:14px}
.inquiry-item{display:flex;justify-content:space-between;align-items:center;padding:10px 20px;border-bottom:1px solid var(--border)}
.inquiry-item:last-child{border-bottom:none}
.inquiry-item .imodel{font-family:var(--font-mono);font-weight:600;color:var(--text);font-size:14px}
.inquiry-item .icat{font-size:11px;color:var(--text-muted)}
.inquiry-item .remove{color:#DC2626;cursor:pointer;background:none;border:none;font-size:18px;padding:0 4px}
.inquiry-foot{padding:16px 20px;border-top:1px solid var(--border);background:var(--bg-secondary)}
.inquiry-foot .btn{width:100%;height:44px;font-size:15px}
.add-inquiry-btn{display:inline-block;margin-top:8px;padding:4px 12px;background:var(--blue);color:#fff;border:none;border-radius:6px;font-size:12px;font-weight:600;cursor:pointer;font-family:var(--font-body)}
.add-inquiry-btn:hover{background:var(--blue-dark)}
.add-inquiry-btn.added{background:var(--bg-muted);color:var(--text-muted);cursor:default}
@media(max-width:640px){.inquiry-fab{left:16px;bottom:16px;padding:0 14px}.inquiry-panel{left:8px;right:8px;width:auto;bottom:76px}}