:root{--navy:#0d2440;--navy-2:#163a63;--ink:#1b2430;--muted:#5b6775;--line:#dde3ea;--bg:#ffffff;--bg-2:#f4f6f9;--accent:#e8820c;--accent-2:#c96d05;--ok:#1f7a4d;--err:#b3261e;--radius:10px;--shadow:0 1px 2px rgba(13,36,64,.06),0 8px 24px rgba(13,36,64,.08);--font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.55;font-size:16px}
img{max-width:100%;height:auto}a{color:var(--navy-2)}a:hover{color:var(--accent-2)}
h1,h2,h3,h4{line-height:1.2;color:var(--navy);margin:0 0 .5em}h1{font-size:clamp(1.7rem,3.2vw,2.5rem);letter-spacing:-.01em}h2{font-size:clamp(1.3rem,2.2vw,1.7rem);margin-top:1.6em}h3{font-size:1.1rem;margin-top:1.2em}
p{margin:0 0 1em}code{font-family:var(--mono);font-size:.92em;background:var(--bg-2);padding:.1em .35em;border-radius:4px}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;padding:8px 12px;z-index:100}.skip:focus{left:8px;top:8px}
.topbar{background:var(--navy);color:#cfd8e3;font-size:.82rem}.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding:6px 20px;flex-wrap:wrap}.topbar a{color:#fff;text-decoration:none}
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);font-weight:800;letter-spacing:.02em}.brand-mark{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:9px;background:var(--navy);color:#fff;font-size:.95rem}.brand-text small{display:block;font-weight:500;font-size:.66rem;color:var(--muted);letter-spacing:.12em;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}.nav>a{padding:8px 10px;text-decoration:none;color:var(--ink);font-weight:500;border-radius:6px;font-size:.95rem}.nav>a:hover,.nav>a[aria-current]{background:var(--bg-2);color:var(--navy)}
.lang{display:flex;gap:2px;margin:0 6px;font-size:.8rem;border:1px solid var(--line);border-radius:6px;overflow:hidden}.lang a,.lang span{padding:4px 8px;text-decoration:none;color:var(--muted)}.lang span{background:var(--navy);color:#fff}
.nav-cta{margin-left:6px}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:6px;width:44px;height:40px;padding:8px;flex-direction:column;justify-content:space-between;cursor:pointer}.nav-toggle span{display:block;height:2px;background:var(--navy)}
.btn{display:inline-block;padding:11px 18px;border-radius:8px;font-weight:600;text-decoration:none;border:1px solid transparent;cursor:pointer;font-size:.95rem;line-height:1.2;font-family:inherit}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-2);color:#fff}.btn-ghost{background:#fff;color:var(--navy);border-color:var(--line)}.btn-ghost:hover{border-color:var(--navy)}.btn-lg{padding:14px 26px;font-size:1.05rem}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.74rem;color:var(--muted);font-weight:600;margin:0 0 .6em}.eyebrow a{color:var(--navy-2);text-decoration:none}
.lead{font-size:1.1rem;color:#33404d;max-width:70ch}
.small{font-size:.82rem;color:var(--muted)}.note{font-size:.86rem;color:var(--muted);border-left:3px solid var(--line);padding-left:10px}
.hero{background:linear-gradient(180deg,#f7f9fc,#fff);border-bottom:1px solid var(--line);padding:40px 0 36px}.hero-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:40px;align-items:start}.hero h1{font-size:clamp(1.8rem,3.4vw,2.7rem)}
.hero-points{list-style:none;padding:0;margin:14px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:6px 18px;font-size:.92rem}.hero-points li::before{content:"✓ ";color:var(--ok);font-weight:700}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.hero-card h2{margin-top:0;font-size:1.2rem}
.band-logos{padding:22px 0 6px}.logo-row{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}.logo-row a{display:inline-block;padding:7px 12px;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--navy);font-weight:600;font-size:.86rem;background:#fff}.logo-row a:hover{border-color:var(--navy)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}.cards.three{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.cards.four{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.ccard,.pcard{display:flex;flex-direction:column;gap:6px;padding:18px;border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;color:var(--ink);background:#fff;transition:border-color .15s,box-shadow .15s}.ccard:hover,.pcard:hover{border-color:var(--navy);box-shadow:var(--shadow);color:var(--ink)}
.ccard-name,.pcard-name{font-weight:700;color:var(--navy);font-size:1.02rem}.ccard-short,.pcard-short{font-size:.9rem;color:var(--muted)}.ccard-count{font-size:.8rem;color:var(--navy-2);margin-top:auto;font-weight:600}.pcard-brand{font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:700}.pcard code{align-self:flex-start}
.why .grid-4 h3{margin-top:0}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.linklist{list-style:none;padding:0;margin:0}.linklist li{padding:9px 0;border-bottom:1px solid var(--line)}.linklist li:last-child{border-bottom:0}.linklist a{font-weight:600;text-decoration:none}.linklist small{display:block;color:var(--muted);font-size:.8rem}.linklist.two{columns:2;column-gap:40px}.linklist.two li{break-inside:avoid}
.checks{list-style:none;padding:0;margin:0 0 1em}.checks li{padding-left:24px;position:relative;margin:5px 0}.checks li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:700}.cols-2{columns:2;column-gap:32px}.cols-2 li{break-inside:avoid}
.chips{list-style:none;padding:0;margin:8px 0;display:flex;flex-wrap:wrap;gap:6px}.chips li{font-size:.74rem;font-weight:700;letter-spacing:.06em;padding:3px 9px;border:1px solid var(--line);border-radius:4px;background:var(--bg-2);color:var(--navy)}
.badge{font-size:.72rem;padding:2px 8px;border-radius:4px;font-weight:700}.badge-warn{background:#fff3e0;color:#9a5300}
.crumbs{padding-top:14px;font-size:.84rem}.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:4px}.crumbs li+li::before{content:"›";margin:0 6px;color:var(--muted)}.crumbs a{text-decoration:none}
.page-head{padding:16px 20px 8px}.page-head h1{margin-bottom:.3em}
.product-head{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:start;padding:12px 0 8px}.product-head h1{margin-bottom:.2em}.mpn{font-size:1.05rem;color:var(--muted)}.mpn strong{font-family:var(--mono);color:var(--navy)}
.product-visual{margin:0}.product-visual img{border-radius:var(--radius);border:1px solid var(--line);width:100%}
.product-grid{display:grid;grid-template-columns:1fr 340px;gap:36px;margin-top:12px}.product-main h2{margin-top:1.4em;padding-top:.6em;border-top:1px solid var(--line)}.product-main section:first-child h2{border-top:0;margin-top:.6em}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:24px}
table{width:100%;border-collapse:collapse;font-size:.93rem}table th,table td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}table th{font-weight:600;color:var(--navy)}
.specs tr.group th{background:var(--bg-2);text-transform:uppercase;letter-spacing:.08em;font-size:.74rem;padding:7px 10px}.specs th[scope=row]{width:38%;font-weight:500;color:var(--ink)}
.alts thead th{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.supply-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.supply-grid h3{margin-top:0}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:16px}.card h2,.card h3{margin-top:0;font-size:1.05rem}
.product-side{position:relative}.quick-rfq{border-color:var(--navy);box-shadow:var(--shadow)}
form label{display:block;font-size:.88rem;font-weight:600;margin:10px 0 4px;color:var(--navy)}form input[type=text],form input[type=email],form input[type=tel],form input[type=number],form input[type=date],form select,form textarea{width:100%;padding:10px 12px;border:1px solid #c7d0db;border-radius:7px;font:inherit;font-size:.95rem;background:#fff;margin-top:4px}form input:focus,form textarea:focus,form select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}form button{margin-top:14px}
.form-status{margin-top:10px;font-size:.9rem;min-height:1.2em}.form-status.ok{color:var(--ok);font-weight:600}.form-status.err{color:var(--err);font-weight:600}
.form-2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.check{display:flex;gap:10px;align-items:flex-start;font-weight:500;margin:14px 0}.check input{margin-top:4px}
.rfq-grid{display:grid;grid-template-columns:1fr 340px;gap:32px;margin-top:8px}.rfq-full h2{font-size:1.1rem;margin-top:1.4em;border-bottom:1px solid var(--line);padding-bottom:6px}.rfq-full h2:first-child{margin-top:0}
.lines{display:flex;flex-direction:column;gap:6px;margin-bottom:10px}.line{display:grid;grid-template-columns:1fr 90px 36px;gap:8px;align-items:center;background:var(--bg-2);padding:6px 8px;border-radius:7px}.line code{background:#fff}.line input{margin:0;padding:6px 8px}.line button{background:none;border:0;color:var(--err);font-size:1.2rem;cursor:pointer;padding:0;margin:0}.lines:empty::before{content:"No line items yet — add part numbers below or upload a BOM.";color:var(--muted);font-size:.9rem}
.line-add{display:grid;grid-template-columns:1fr 90px auto;gap:8px;align-items:end}.line-add input{margin:0}.line-add .btn{margin:0;padding:10px 14px}
#paste-in{margin-top:6px}#paste-add{margin-top:8px}
.file-drop{display:block;border:2px dashed #c7d0db;border-radius:var(--radius);padding:18px;text-align:center;font-weight:500;cursor:pointer}.file-drop input{display:block;margin:10px auto}.file-drop:hover{border-color:var(--navy)}
.steps{padding-left:20px}.steps li{margin:6px 0}
.faq details{border:1px solid var(--line);border-radius:8px;padding:0 16px;margin:8px 0;background:#fff}.faq summary{cursor:pointer;font-weight:600;padding:12px 0;color:var(--navy);list-style:none;position:relative;padding-right:28px}.faq summary::after{content:"+";position:absolute;right:0;top:10px;font-size:1.3rem;color:var(--muted)}.faq details[open] summary::after{content:"–"}.faq details p{margin:0 0 14px}
.related{margin-top:36px}
.article{max-width:1180px}.article-head{padding:12px 0 8px;max-width:800px}.byline{color:var(--muted);font-size:.9rem}.article-grid{display:grid;grid-template-columns:1fr 320px;gap:40px}
.prose{max-width:76ch}.prose h2{margin-top:1.6em}.prose h3{margin-top:1.3em}.prose ul,.prose ol{padding-left:22px}.prose li{margin:4px 0}.prose table{margin:14px 0}.prose blockquote{border-left:3px solid var(--accent);margin:1em 0;padding:4px 16px;color:#33404d;background:var(--bg-2)}.prose .callout{background:var(--bg-2);border-left:3px solid var(--navy);padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0}
.article-cta{background:var(--navy);color:#fff;padding:22px;border-radius:var(--radius);margin:32px 0}.article-cta h2{color:#fff;margin-top:0;font-size:1.2rem}.article-cta p{color:#d7e0ea}
.page-body{max-width:1180px}.page-body .prose{max-width:none}.page-body .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.page-body .grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}.page-body .box{background:var(--bg-2);border-radius:var(--radius);padding:18px}.page-body .box h3{margin-top:0}
.process{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;counter-reset:step}.process li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;counter-increment:step}.process li::before{content:counter(step,decimal-leading-zero);display:block;font-family:var(--mono);color:var(--accent);font-weight:700;font-size:.9rem;margin-bottom:6px}.process h3{margin:0 0 .4em;font-size:1rem}.process p{margin:0;font-size:.92rem;color:#33404d}
.cta-band{background:var(--navy);color:#fff;margin-top:48px;padding:36px 0}.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}.cta-band h2{color:#fff;margin:0 0 .3em}.cta-band p{color:#c9d4e0;margin:0;max-width:60ch}.cta-band .btn-ghost{background:transparent;color:#fff;border-color:#4b6a8f}
.site-footer{background:#0a1b30;color:#b9c6d4;padding:36px 0 20px;font-size:.9rem}.site-footer h3{color:#fff;font-size:.86rem;text-transform:uppercase;letter-spacing:.1em;margin:0 0 10px}.site-footer ul{list-style:none;padding:0;margin:0 0 18px}.site-footer li{margin:4px 0}.site-footer a{color:#dbe4ee;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}.brand-foot{color:#fff;font-weight:800;font-size:1.1rem;letter-spacing:.04em;margin-bottom:8px}.foot-note{border-top:1px solid #1f3650;margin-top:16px;padding-top:14px;font-size:.78rem;color:#8b9bad}
.fab{position:fixed;right:14px;bottom:18px;display:flex;flex-direction:column;gap:8px;z-index:60}.fab a{display:inline-block;padding:9px 14px;border-radius:999px;color:#fff;font-weight:700;text-decoration:none;font-size:.85rem;box-shadow:0 4px 14px rgba(0,0,0,.2)}.fab-zalo{background:#0068ff}.fab-call{background:var(--ok)}.fab-mail{background:var(--navy-2)}
@media (max-width:980px){.hero-grid,.product-head,.product-grid,.rfq-grid,.article-grid{grid-template-columns:1fr}.grid-4{grid-template-columns:1fr 1fr}.process{grid-template-columns:1fr}.page-body .grid-3{grid-template-columns:1fr}}
@media (max-width:760px){.nav-toggle{display:flex}.nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 16px;gap:2px}.nav.open{display:flex}.nav>a{padding:11px 8px}.lang{margin:8px 0;align-self:flex-start}.topbar-right{display:none}.two-col,.supply-grid,.form-2,.page-body .grid-2,.grid-4{grid-template-columns:1fr}.hero-points{grid-template-columns:1fr}.linklist.two,.cols-2{columns:1}.line-add{grid-template-columns:1fr 70px}.line-add .btn{grid-column:1/-1}.cta-band .wrap{flex-direction:column;align-items:flex-start}.fab{flex-direction:row;left:14px;right:14px;bottom:12px}.fab a{flex:1;text-align:center}body{padding-bottom:64px}}
@media print{.site-header,.topbar,.fab,.cta-band,.site-footer,.quick-rfq{display:none}}