:root{
  --navy:#1B3A4B; --navy-d:#12293A; --orange:#E8833A; --orange-d:#D06F27;
  --bg:#F6F7F8; --card:#FFFFFF; --line:#E2E6E9; --text:#22303A; --muted:#6B7A85;
  --gradeA:#2E7D32; --gradeB:#F9A825; --gradeC:#8D6E63; --asis:#757575;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter','Segoe UI','Source Han Sans SC',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:17px}
img{max-width:100%;display:block}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--orange)}
.container{max-width:1120px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:grid;grid-template-columns:auto auto;align-items:center;column-gap:10px;row-gap:2px;color:#fff;font-weight:800;font-size:23px;letter-spacing:.5px}
.logo img{grid-row:1/3}
.logo-badge{width:36px;height:36px;background:var(--orange);border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:19px}
.logo small{display:block;font-size:12.5px;font-weight:600;color:#C6D3DB;letter-spacing:2px;line-height:1.5;text-align:justify;text-align-last:justify}
nav.main-nav{display:flex;gap:28px;align-items:center}
nav.main-nav a{color:#E4ECF1;font-size:16.5px;font-weight:600;padding:6px 0;border-bottom:2px solid transparent}
nav.main-nav a:hover,nav.main-nav a.active{color:#fff;border-bottom-color:var(--orange)}
.nav-cta{background:var(--orange);color:#fff!important;padding:10px 22px!important;border-radius:6px;font-weight:700!important;font-size:16.5px!important;border-bottom:none!important}
.nav-cta:hover{background:var(--orange-d)}
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:26px;cursor:pointer}

/* ---------- hero ---------- */
.hero{background:linear-gradient(135deg,var(--navy-d) 0%,var(--navy) 60%,#28556D 100%);color:#fff;padding:84px 0 76px}
.hero h1{font-size:clamp(30px,4vw,44px);font-weight:800;line-height:1.2;max-width:840px}
.hero h1 em{color:var(--orange);font-style:normal}
.hero p.sub{margin:20px 0 30px;font-size:19px;color:#C9D6DE;max-width:680px}
.btn{display:inline-block;padding:13px 26px;border-radius:6px;font-weight:600;font-size:16.5px;cursor:pointer;border:none;transition:.15s}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-d);color:#fff}
.btn-outline{border:2px solid rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-d);color:#fff}
.btn-group{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- trust bar ---------- */
.trustbar{background:#fff;border-bottom:1px solid var(--line);padding:16px 0}
.trustbar-inner{display:flex;flex-wrap:wrap;gap:10px 36px;justify-content:center}
.trustbar span{font-size:14.5px;color:var(--muted);font-weight:500}
.trustbar b{color:var(--navy)}

/* ---------- sections ---------- */
section.block{padding:64px 0}
section.block.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:36px;max-width:720px}
.sec-head h2{font-size:clamp(24px,3vw,32px);color:var(--navy);font-weight:800;line-height:1.25}
.sec-head p{margin-top:10px;color:var(--muted);font-size:17.5px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2.5px;text-transform:uppercase;color:var(--orange);margin-bottom:10px}

/* ---------- category cards ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:26px 24px;transition:.15s;position:relative}
.cat-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(27,58,75,.09);transform:translateY(-2px)}
.cat-card .icon{font-size:30px;margin-bottom:12px}
.cat-card h3{font-size:18.5px;color:var(--navy);margin-bottom:6px}
.cat-card p{font-size:15px;color:var(--muted)}
.cat-card .count{position:absolute;top:20px;right:22px;font-size:13px;font-weight:700;color:var(--orange);background:#FDF1E7;padding:3px 10px;border-radius:99px}

/* ---------- product cards ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;display:flex;flex-direction:column;transition:.15s}
.prod-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(27,58,75,.09)}
.prod-thumb{height:170px;background:linear-gradient(135deg,#E8EDF0,#D4DDE2);display:flex;align-items:center;justify-content:center;color:#9AAAB4;font-size:14px;text-align:center;padding:10px}
.prod-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.prod-body .sku{font-size:12.5px;color:var(--muted);letter-spacing:1px;font-weight:600}
.prod-body h3{font-size:16.5px;color:var(--navy);line-height:1.35;font-weight:700}
.prod-body .compat{font-size:14px;color:var(--muted)}
.prod-meta{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:10px;border-top:1px dashed var(--line)}
.price{font-weight:800;color:var(--navy);font-size:17px}
.stock{font-size:13.5px;color:var(--muted)}

.grade-badge{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.8px;padding:3px 10px;border-radius:99px;color:#fff;text-transform:uppercase;width:max-content}
.grade-a{background:var(--gradeA)} .grade-b{background:var(--gradeB)} .grade-c{background:var(--gradeC)} .grade-asis{background:var(--asis)}

/* ---------- grading table ---------- */
.grade-table{width:100%;border-collapse:collapse;background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 10px rgba(27,58,75,.06)}
.grade-table th{background:var(--navy);color:#fff;text-align:left;padding:13px 16px;font-size:14.5px;letter-spacing:.5px}
.grade-table td{padding:14px 16px;border-bottom:1px solid var(--line);font-size:15.5px;vertical-align:top}
.grade-table tr:last-child td{border-bottom:none}
.grade-table td:first-child{white-space:nowrap}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
.step{background:#fff;border:1px solid var(--line);border-radius:10px;padding:26px 24px}
.step .num{width:34px;height:34px;background:var(--orange);color:#fff;font-weight:800;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.step h3{font-size:17.5px;color:var(--navy);margin-bottom:8px}
.step p{font-size:15px;color:var(--muted)}

/* ---------- cta band ---------- */
.cta-band{background:var(--navy);color:#fff;padding:60px 0;text-align:center}
.cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:800}
.cta-band p{color:#C9D6DE;margin:12px auto 26px;max-width:680px}

/* ---------- footer ---------- */
.site-footer{background:var(--navy-d);color:#9FB2BD;padding:52px 0 0;font-size:15px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.site-footer h4{color:#fff;font-size:15px;letter-spacing:1px;text-transform:uppercase;margin-bottom:14px}
.site-footer a{color:#9FB2BD;display:block;padding:4px 0;font-size:14.5px}
.site-footer a:hover{color:var(--orange)}
.disclaimer{border-top:1px solid #2B4B5E;padding:22px 0;font-size:13px;color:#7E93A0;line-height:1.7}
.copyright{background:#0E2231;text-align:center;padding:14px 0;font-size:13.5px;color:#6B8090}

/* ---------- forms ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:32px;max-width:640px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--navy);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:6px;font-size:15.5px;font-family:inherit;background:#FBFCFD}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--orange)}
.field .req{color:var(--orange)}
.form-note{font-size:13.5px;color:var(--muted);margin-top:10px}

/* ---------- page hero (inner pages) ---------- */
.page-hero{background:linear-gradient(135deg,var(--navy-d),var(--navy));color:#fff;padding:52px 0}
.page-hero h1{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.page-hero p{color:#C9D6DE;margin-top:10px;max-width:700px}
.breadcrumb{font-size:14px;color:#8FA6B3;margin-bottom:14px}
.breadcrumb a{color:#B9C6CE}

/* ---------- filters ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.filter-bar a.chip{background:#fff;border:1px solid var(--line);border-radius:99px;padding:7px 18px;font-size:14.5px;font-weight:600;color:var(--navy)}
.filter-bar a.chip.active,.filter-bar a.chip:hover{background:var(--navy);color:#fff;border-color:var(--navy)}

/* ---------- product detail ---------- */
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.gallery-main{background:linear-gradient(135deg,#E8EDF0,#D4DDE2);border-radius:10px;height:380px;display:flex;align-items:center;justify-content:center;color:#9AAAB4;font-size:15px}
.gallery-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:10px}
.gallery-thumbs div{background:#E4EAEE;border-radius:8px;height:84px;display:flex;align-items:center;justify-content:center;color:#9AAAB4;font-size:12.5px;text-align:center;padding:6px}
.spec-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.spec-table td{padding:11px 16px;border-bottom:1px solid var(--line);font-size:15.5px}
.spec-table td:first-child{font-weight:600;color:var(--navy);width:38%;background:#FAFBFC}
.spec-table tr:last-child td{border-bottom:none}
.price-block{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px;margin-top:20px}
.price-block .price{font-size:26px}
.condition-notes li{margin:6px 0 6px 18px;font-size:15.5px}

/* ---------- prose ---------- */
.prose{background:#fff;border:1px solid var(--line);border-radius:10px;padding:40px 44px;max-width:860px}
.prose h2{color:var(--navy);font-size:22px;margin:30px 0 12px}
.prose h2:first-child{margin-top:0}
.prose h3{color:var(--navy);font-size:18px;margin:22px 0 8px}
.prose p,.prose li{font-size:16px;color:#3B4A55}
.prose ul,.prose ol{margin:8px 0 8px 22px}
.prose li{margin:5px 0}
.prose table{width:100%;border-collapse:collapse;margin:14px 0}
.prose td,.prose th{border:1px solid var(--line);padding:9px 12px;font-size:15px;text-align:left}
.prose th{background:#F0F3F5;color:var(--navy)}

.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:12px;padding:20px 24px}
.faq-item h3{font-size:17px;color:var(--navy);margin-bottom:6px}
.faq-item p{font-size:15.5px;color:#3B4A55}

/* ---------- blog list ---------- */
.post-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px;display:block;transition:.15s}
.post-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(27,58,75,.08)}
.post-card h3{color:var(--navy);font-size:18px;margin-bottom:8px}
.post-card p{font-size:15px;color:var(--muted)}
.post-card .tag{font-size:12.5px;font-weight:700;color:var(--orange);letter-spacing:1px;text-transform:uppercase}

/* ---------- wa float ---------- */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:200;display:flex;align-items:center;gap:10px;background:#25D366;color:#fff;padding:13px 20px;border-radius:99px;font-weight:700;font-size:15.5px;box-shadow:0 8px 22px rgba(0,0,0,.22)}
.wa-float:hover{background:#1FB955;color:#fff}

@media(max-width:820px){
  nav.main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--navy-d);flex-direction:column;padding:18px 24px;gap:14px;align-items:flex-start}
  nav.main-nav.open{display:flex}
  .menu-toggle{display:block}
  .detail-grid,.form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .prose{padding:26px 22px}
}

/* ---- Catalog: search + hierarchical browse (v20261029c) ---- */
.searchbar{display:flex;gap:10px;margin:0 0 14px}
.searchbar input{flex:1;padding:13px 18px;border:1.5px solid var(--line);border-radius:8px;font-size:16px}
.searchbar input:focus{outline:none;border-color:var(--orange)}
.view-tabs{display:flex;gap:8px;margin:0 0 26px;border-bottom:2px solid var(--line)}
.view-tabs button{background:none;border:none;padding:10px 16px;font-size:15.5px;font-weight:700;color:var(--navy);opacity:.55;cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-2px}
.view-tabs button.active{opacity:1;border-bottom-color:var(--orange)}
.cat-section{margin-bottom:38px}
.cat-section>h2{display:flex;align-items:center;gap:10px;font-size:22px;margin:0 0 18px;padding-bottom:10px;border-bottom:2px solid var(--line)}
.brand-block{margin-bottom:26px}
.brand-block>h3{font-size:16px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;color:var(--navy);opacity:.75;margin:0 0 12px}
.model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.model-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;cursor:pointer;transition:.15s}
.model-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(27,58,75,.09)}
.model-card h4{margin:0 0 6px;font-size:17px}
.model-card .mc-meta{font-size:14px;color:var(--navy);opacity:.7}
.model-card .mc-meta b{color:var(--orange)}
.model-card .mc-toggle{float:right;font-size:13px;font-weight:700;color:var(--orange)}
.model-parts{display:none;margin-top:14px;padding-top:14px;border-top:1px dashed var(--line)}
.model-card.open .model-parts{display:block}
.model-card.open{grid-column:1/-1}
.model-parts .prod-grid{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.no-result{display:none;text-align:center;padding:44px 20px;color:var(--navy);opacity:.75}
.browse-hint{font-size:14.5px;color:var(--navy);opacity:.65;margin:0 0 22px}

/* ---- Model card with device image (v20261029e) ---- */
.mc-head{display:flex;gap:14px;align-items:flex-start}
.mc-thumb{width:72px;height:72px;flex:0 0 72px;background:#F6F8FA;border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.mc-thumb img{width:100%;height:100%;object-fit:contain;padding:8px;box-sizing:border-box}
.mc-txt{flex:1;min-width:0}
.mc-txt h4{margin:0 0 6px;padding-right:60px}
.mc-ctx{display:block;font-size:13px;font-weight:700;color:var(--orange);letter-spacing:.5px;text-transform:uppercase;margin-bottom:4px}
.sr-title{font-size:18px;margin:6px 0 14px;color:var(--navy)}
.sr-title + .prod-grid{margin-bottom:30px}

/* ---- DeviceType group title + assembly block (v20261029f) ---- */
.group-title{font-size:14.5px;font-weight:700;color:var(--navy);margin:0 0 10px;padding:6px 12px;background:#EEF3F6;border-left:3px solid var(--orange);border-radius:0 6px 6px 0}
.asm-block{margin:0 0 18px}
.asm-head{font-size:15px;color:var(--navy);margin:0 0 10px}
.asm-head b{color:var(--navy)}
.asm-note{font-size:13px;font-weight:700;color:var(--orange);margin-left:6px}

/* ---- On-request placeholder model cards (v20261029g) ---- */
.model-card.on-request{border-style:dashed}
.model-card.on-request:hover{box-shadow:none}
.mc-inq{display:inline-block;margin-top:10px;padding:7px 16px;font-size:14px}

/* ---- Breadcrumb navigation (v20261029i) ---- */
.crumb-nav{font-size:15.5px;margin:0 0 16px;color:var(--navy)}
.crumb-nav a{color:var(--orange);font-weight:600;text-decoration:none}
.crumb-nav a:hover{text-decoration:underline}
.crumb-nav .sep{margin:0 8px;opacity:.45}
.breadcrumb .sep{margin:0 6px;opacity:.5}

/* ---- Doubao-style catalog layout (v20261029j) ---- */
.browse-layout{display:grid;grid-template-columns:250px 1fr;gap:30px;align-items:start}
.browse-side{position:sticky;top:80px;display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px}
.cat-tab{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:13px 14px;border-radius:8px;cursor:pointer;font-weight:700;font-size:15.5px;color:var(--navy);border:2px solid transparent;transition:.15s}
.cat-tab:hover{background:#F6F8FA}
.cat-tab.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.cat-tab .cnt{font-size:12.5px;font-weight:600;opacity:.6;white-space:nowrap}
.cat-tab.on .cnt{opacity:.85}
.cat-head{display:flex;align-items:baseline;gap:12px;margin:0 0 14px}
.cat-head h2{font-size:24px;margin:0}
.cat-head .zh{font-size:15px;color:var(--navy);opacity:.55;font-weight:600}
.brand-quick{background:#FDF1E7;border:1px solid rgba(232,131,58,.3);border-radius:10px;padding:14px 18px;margin:0 0 8px}
.brand-quick b{display:block;font-size:15px;margin-bottom:10px;color:var(--navy)}
.brand-quick a{display:inline-block;padding:8px 18px;background:#fff;border:1px solid var(--line);border-radius:99px;margin:0 8px 8px 0;font-weight:700;color:var(--navy);font-size:15px;cursor:pointer;transition:.15s}
.brand-quick a:hover{border-color:var(--orange);color:var(--orange)}
.brand-head{display:flex;align-items:baseline;gap:9px;margin:26px 0 6px}
.brand-head .dot{width:9px;height:9px;background:var(--orange);border-radius:50%;align-self:center;flex:0 0 9px}
.brand-head h3{margin:0;font-size:19px}
.brand-head .zh{font-size:14px;color:var(--navy);opacity:.55;font-weight:600}
@media(max-width:820px){.browse-layout{grid-template-columns:1fr}.browse-side{position:static;flex-direction:row;flex-wrap:wrap}}

/* ---- Brand pill active state (v20261029k) ---- */
.brand-quick a.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.brand-quick a.pill-reset{border-style:dashed;opacity:.85}

/* ---- Home consolidation: slim nav, one-line strapline, highlighted sections (v20261029n) ---- */
.logo small{white-space:nowrap}
.logo span{white-space:nowrap}
@media(max-width:520px){.logo span{font-size:17px}.logo small{font-size:9px;letter-spacing:.8px}}

/* section variants: coloured backgrounds to make key blocks stand out */
section.block.soft{background:#EFF4F7;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
section.block.warm{background:#FDF3EA;border-top:1px solid rgba(232,131,58,.22);border-bottom:1px solid rgba(232,131,58,.22)}
section.block.deep{background:var(--navy-d);color:#C9D6DE}
section.block.deep .sec-head h2{color:#fff}
section.block.deep .sec-head p{color:#A9BECB}
section.block.deep .eyebrow{color:var(--orange)}

/* content strip: two-column text + callout cards */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:start}
.split h3{font-size:18px;color:var(--navy);margin:0 0 8px}
.split p{font-size:16px;color:#3B4A55;margin-bottom:12px}
.mini-list{list-style:none;margin:0}
.mini-list li{position:relative;padding-left:24px;font-size:15.5px;color:#3B4A55;margin-bottom:9px}
.mini-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--orange);font-weight:800}
.callout{background:#fff;border:1px solid var(--line);border-left:4px solid var(--orange);border-radius:10px;padding:22px 24px}
.callout h3{font-size:16.5px;color:var(--navy);margin-bottom:10px}
.callout p,.callout li{font-size:15px;color:#3B4A55}
.callout ul{margin:0 0 0 18px}
.callout li{margin-bottom:7px}
.callout .small{font-size:13.5px;color:var(--muted);margin-top:10px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag-row span{background:#fff;border:1px solid var(--line);border-radius:99px;padding:6px 14px;font-size:14px;font-weight:600;color:var(--navy)}

/* resource tiles */
.res-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
.res-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;display:block;transition:.15s}
.res-card:hover{border-color:var(--orange);box-shadow:0 6px 18px rgba(27,58,75,.08);transform:translateY(-2px)}
.res-card .ico{font-size:22px}
.res-card h3{font-size:16.5px;color:var(--navy);margin:10px 0 6px}
.res-card p{font-size:14.5px;color:var(--muted);margin:0}
.res-card .go{display:inline-block;margin-top:10px;font-size:14px;font-weight:700;color:var(--orange)}

/* number strip for the sourcing steps (compact, on the warm band) */
.steps.four{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
section.block.warm .step{background:#fff}
@media(max-width:820px){.split{grid-template-columns:1fr;gap:26px}}

/* ---- Balanced heading wrap: avoid one-word orphan lines (v20261029p) ---- */
h1,h2,h3,.cta-band h2,.sec-head h2{ text-wrap:balance; }

/* ---- lead paragraphs balanced wrap (zh) ---- */
.hero p.sub,.page-hero p,.sec-head p,.cta-band p,.cat-card p,.res-card p,.src-band span{ text-wrap:balance; }

/* no-break unit: keep number+unit together (v20261031) */
.nb{white-space:nowrap}

/* ================= MOBILE / TABLET ADAPTATION (v20261104) =================
   Targets Android (360/384/412dp) and iOS (375/390/414/430pt).
   Layered after desktop rules so later rules win; site-wide, no per-page edits. */

/* ---- safeguards that apply at every width ---- */
img,video,iframe,svg{max-width:100%;height:auto}
img{display:block}
/* iOS Safari zooms the page when a focused control is under 16px */
input,select,textarea{font-size:16px}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{overflow-x:hidden;-webkit-overflow-scrolling:touch}
a,button,.cat-tab,.model-card{-webkit-tap-highlight-color:transparent}
/* long unbroken strings (SKUs, emails, URLs) must not blow out the layout */
.crumb-nav,.breadcrumb,.spec-table td,.model-card h4,.prod-card h3,
.footer-grid a,.disclaimer,.prose p,.prose li{overflow-wrap:anywhere;word-break:break-word}
/* tables always scroll horizontally instead of squashing */
.prose table,.spec-table,.grade-table,table{max-width:100%}

/* ---- tablet / small laptop ---- */
@media(max-width:900px){
  .container{padding:0 20px}
  .hero{padding:64px 0 58px}
  section.block{padding:52px 0}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}
}

/* ---- phones & small tablets: ≤768px ---- */
@media(max-width:768px){
  .container{padding:0 16px}

  /* header: keep 56px bar, logo down one notch so nav has room */
  .header-inner{height:56px}
  .logo{font-size:19px;column-gap:8px}
  .logo img{height:36px!important}
  .logo small{font-size:9px;letter-spacing:1.1px}
  nav.main-nav{top:56px;padding:16px 16px 20px;gap:4px}
  nav.main-nav a{display:block;width:100%;padding:12px 4px;font-size:17px;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-cta{margin-top:10px;text-align:center;border-radius:8px}
  .menu-toggle{font-size:24px;padding:4px 2px}

  /* hero */
  .hero{padding:46px 0 42px}
  .hero h1{font-size:clamp(26px,7vw,34px);line-height:1.25}
  .hero p.sub{font-size:16.5px;margin:16px 0 24px}
  .btn{padding:13px 22px;font-size:16px}
  .btn-group{gap:10px}
  .btn-group .btn{flex:1 1 auto;text-align:center}

  /* sections */
  section.block{padding:42px 0}
  .sec-head{margin-bottom:26px}
  .sec-head h2{font-size:clamp(21px,5.6vw,26px)}
  .sec-head p{font-size:16px}

  /* every multi-column grid collapses to one column */
  .cat-grid,.prod-grid,.model-grid,.steps,.steps.four,.res-grid,
  .detail-grid,.form-row,.split,.browse-layout{grid-template-columns:1fr!important}
  .model-parts .prod-grid{grid-template-columns:1fr!important}
  .cat-grid,.prod-grid,.model-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))!important;gap:12px}
  .steps,.steps.four{gap:16px}
  .split{gap:22px}

  /* cards: tighter padding so content gets the width */
  .cat-card{padding:20px 18px}
  .cat-card .icon{font-size:26px;margin-bottom:8px}
  .prod-card{padding:14px}
  .model-card{padding:14px}
  /* mobile: stack card head (thumb above text) so model names get full width */
  .model-card .mc-head{flex-direction:column;align-items:stretch;gap:10px}
  .model-card .mc-thumb{width:100%;height:104px;flex:0 0 auto}
  .model-card .mc-thumb img{padding:10px}
  .model-card .mc-txt h4{padding-right:0;font-size:16.5px;word-break:break-word}
  .model-card .mc-toggle{float:none;display:inline-block;margin:0 0 2px}
  .post-card{padding:18px}
  .price-block,.faq-item{padding:18px}
  .form-card{padding:22px 18px;max-width:100%}
  .prose{padding:24px 18px;max-width:100%;border-radius:8px}
  .prose h2{font-size:20px;margin:24px 0 10px}
  .prose h3{font-size:17px}

  /* catalog: sidebar becomes a horizontal scroll strip, not a stack of rows */
  .browse-side{position:static;flex-direction:row!important;flex-wrap:nowrap!important;gap:8px;
    overflow-x:auto;overflow-y:hidden;padding:8px;border-radius:8px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .browse-side::-webkit-scrollbar{display:none}
  .cat-tab{flex:0 0 auto;padding:10px 14px;font-size:15px;border-width:1.5px;white-space:nowrap}
  .cat-tab .cnt{font-size:12px}
  .brand-quick{padding:12px 14px;margin-bottom:14px}
  .brand-quick a{padding:8px 14px;font-size:14.5px;margin:0 6px 6px 0}
  .brand-head{margin:20px 0 6px}
  .brand-head h3{font-size:17px}
  .cat-head h2{font-size:20px}

  /* search + tabs */
  .searchbar{flex-direction:column;gap:8px}
  .searchbar input{padding:13px 14px;border-radius:8px}
  .searchbar .btn{width:100%;text-align:center}
  .view-tabs{gap:0;overflow-x:auto;scrollbar-width:none}
  .view-tabs::-webkit-scrollbar{display:none}
  .view-tabs button{padding:10px 12px;font-size:15px;white-space:nowrap}

  /* product detail */
  .gallery-main{height:250px}
  .gallery-thumbs div{height:66px;font-size:11.5px}
  .spec-table td{padding:10px 12px;font-size:15px}
  .spec-table td:first-child{width:42%}
  .price-block .price{font-size:23px}

  /* footer */
  .site-footer{padding:38px 0 0;font-size:14.5px}
  .footer-grid{grid-template-columns:1fr 1fr!important;gap:22px 18px;padding-bottom:28px}
  .footer-grid>div:first-child{grid-column:1/-1}
  .site-footer a{padding:5px 0;font-size:14.5px}
  .disclaimer{font-size:12.5px;padding:18px 0}

  /* floating WhatsApp: icon-only so it stops covering product cards */
  .wa-float{padding:0;width:52px;height:52px;justify-content:center;border-radius:50%;right:14px;bottom:14px;font-size:0;letter-spacing:-999px}
  .wa-float::before{content:"💬";font-size:24px;letter-spacing:0;line-height:1}
}

/* ---- small phones: iPhone SE / Android 360dp: ≤390px ---- */
@media(max-width:390px){
  .footer-grid{gap:22px 18px}
  .container{padding:0 13px}
  .logo{font-size:17px}
  .logo img{height:32px!important}
  .logo small{font-size:8px;letter-spacing:.6px}
  .hero h1{font-size:25px}
  .hero p.sub{font-size:15.5px}
  section.block{padding:36px 0}
  .cat-grid,.prod-grid,.model-grid{grid-template-columns:1fr!important}
  .footer-grid{grid-template-columns:1fr!important}
  .footer-grid>div{grid-column:auto}
  .gallery-main{height:210px}
  .btn{padding:12px 18px;font-size:15.5px}
}

/* ---- landscape phones: keep the sticky header from eating the viewport ---- */
@media(max-height:480px) and (orientation:landscape){
  .header-inner{height:48px}
  nav.main-nav{top:48px;max-height:calc(100vh - 48px);overflow-y:auto}
  .hero{padding:34px 0 30px}
}

/* ---- print / wide screens: never let the grid stretch absurdly ---- */
@media(min-width:1440px){
  .container{max-width:1200px}
}

/* ---- iPhone notch / home-indicator / Android gesture bar safe areas ---- */
.site-header{padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}
.wa-float{right:calc(14px + env(safe-area-inset-right));bottom:calc(14px + env(safe-area-inset-bottom))}
.site-footer,.copyright{padding-bottom:env(safe-area-inset-bottom)}
@media(min-width:769px){
  .wa-float{right:calc(22px + env(safe-area-inset-right));bottom:calc(22px + env(safe-area-inset-bottom))}
}

/* ---- sourcing breadth callout (v20261107) ---- */
.shelf-note{display:flex;align-items:center;gap:28px;justify-content:space-between;
  background:#FDF3EA;border:1px solid rgba(232,131,58,.32);border-left:4px solid var(--orange);
  border-radius:10px;padding:24px 28px;margin-top:28px}
.shelf-note h3{font-size:19px;color:var(--navy);margin-bottom:8px}
.shelf-note p{font-size:16px;color:#3B4A55;margin-top:8px;max-width:760px}
.shelf-note p b{color:var(--navy)}
.shelf-note .btn{flex:0 0 auto;white-space:nowrap}
@media(max-width:768px){
  .shelf-note{flex-direction:column;align-items:flex-start;gap:16px;padding:20px 18px;margin-top:22px}
  .shelf-note h3{font-size:17px}
  .shelf-note p{font-size:15.5px}
  .shelf-note .btn{width:100%;text-align:center;white-space:normal}
}

/* ---- "source it for me" entry points (v20261108) ---- */
.cat-card-src{border-style:dashed;border-color:rgba(232,131,58,.55);background:#FFFDFB}
.cat-card-src:hover{border-color:var(--orange);border-style:solid}
.cat-card-src .icon{opacity:.8}
.cat-card-src .count{background:var(--orange)!important;color:#fff!important}
.cat-tab-src{border-style:dashed;border-color:rgba(232,131,58,.55)!important;background:#FFFDFB;color:var(--orange)!important;margin-top:6px}
.cat-tab-src:hover{background:#FDF1E7;border-color:var(--orange)!important}
.cat-tab-src .cnt{opacity:.85}
.src-band{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:34px;padding:20px 24px;
  background:#FDF3EA;border:1px dashed rgba(232,131,58,.6);border-radius:10px;color:var(--navy)}
.src-band:hover{background:#FBEBDB;color:var(--navy)}
.src-band b{font-size:16.5px;color:var(--navy)}
.src-band span{font-size:15px;color:#4A5A66;flex:1 1 320px;line-height:1.6}
.src-band em{font-style:normal;font-weight:700;color:var(--orange);white-space:nowrap;font-size:15.5px}
@media(max-width:768px){
  .src-band{flex-direction:column;align-items:flex-start;gap:10px;padding:16px 16px;margin-top:24px}
  .src-band b{font-size:15.5px}
  .src-band span{font-size:14.5px;flex:1 1 auto}
  .src-band em{font-size:15px}
}

/* ---- highlighted hero callout (v20261113) ---- */
.page-hero p.hero-alert{display:inline-block;box-sizing:border-box;margin-top:16px;padding:14px 20px 14px 18px;
  background:rgba(232,131,58,.16);border-left:4px solid var(--orange);border-radius:0 8px 8px 0;
  color:#FFFFFF;font-size:18px;line-height:1.65;max-width:760px}
.page-hero p.hero-alert b{color:#FFB56E;font-weight:800}
@media(max-width:768px){
  .page-hero p.hero-alert{font-size:16.5px;padding:12px 14px 12px 13px;border-left-width:3px;margin-top:14px;max-width:100%;border-radius:0 6px 6px 0}
}

/* ---- language switch in header (added for public deploy) ---- */
nav.main-nav a.nav-lang{font-size:14px;font-weight:600;color:#9FB3BF;letter-spacing:.6px;
  border:1px solid rgba(255,255,255,.24);border-radius:4px;padding:5px 11px;margin-left:2px}
nav.main-nav a.nav-lang:hover{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.07)}
@media(max-width:768px){
  nav.main-nav a.nav-lang{border:none;border-radius:0;margin-left:0;padding:12px 4px;
    font-size:15px;color:#9FB3BF;border-bottom:1px solid rgba(255,255,255,.08)}
  nav.main-nav a.nav-lang:hover{background:none;color:#fff}
}