.fr4-page{background:#fff;color:var(--ink);overflow-x:hidden}
.fr4-page *{box-sizing:border-box}
.fr4-skip{position:fixed;left:18px;top:-80px;z-index:120;background:#fff;color:var(--navy-950);padding:12px 16px;border-radius:6px;box-shadow:0 8px 24px rgba(7,24,51,.22);font-weight:800}
.fr4-skip:focus{top:18px}
.fr4-page main a:focus-visible,.fr4-page main summary:focus-visible{outline:3px solid #f3d27e;outline-offset:3px}
.fr4-section{padding:92px 0}
.fr4-section--mist{background:#f3f6fa}
.fr4-section--dark{background:#091c39;color:#fff}
.fr4-kicker{display:flex;align-items:center;gap:10px;margin-bottom:14px;color:var(--red-500);font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:2px;text-transform:uppercase}
.fr4-kicker:before{content:"";display:block;width:22px;height:2px;background:currentColor}
.fr4-section--dark .fr4-kicker{color:#f3d27e}
.fr4-title{max-width:820px;color:var(--navy-950);font-family:var(--disp);font-size:42px;line-height:1.12;letter-spacing:-1px}
.fr4-section--dark .fr4-title{color:#fff}
.fr4-intro{max-width:780px;margin-top:18px;color:#4e5f78;font-size:17px;line-height:1.75}
.fr4-section--dark .fr4-intro{color:#c6d3e8}

.fr4-hero{position:relative;height:var(--service-hero-desktop-height,620px);min-height:620px;overflow:hidden;background:#071a35;color:#fff}
.fr4-hero:after{content:"";position:absolute;right:-170px;top:-190px;width:500px;height:500px;border:1px solid rgba(211,25,32,.35);border-radius:50%;box-shadow:0 0 0 74px rgba(211,25,32,.025),0 0 0 148px rgba(61,107,214,.035);pointer-events:none}
.fr4-hero .wrap{height:100%}
.fr4-hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.02fr) minmax(420px,.98fr);gap:64px;align-items:center;height:100%}
.fr4-crumb{margin-bottom:18px;color:#9fb2cf;font-family:var(--mono);font-size:11px;letter-spacing:.5px}
.fr4-crumb a{color:#fff;text-decoration:none}
.fr4-hero h1{max-width:650px;color:#fff;font-family:var(--disp);font-size:58px;line-height:1.04;letter-spacing:-2px}
.fr4-hero-lead{max-width:650px;margin-top:22px;color:#d0daea;font-size:18px;line-height:1.72}
.fr4-hero-actions{display:flex;align-items:center;gap:18px;margin-top:30px;flex-wrap:wrap}
.fr4-page .fr4-btn-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 18px;border:1px solid rgba(255,255,255,.48);border-radius:6px;color:#fff;font-size:13px;font-weight:800;text-decoration:none}
.fr4-page .fr4-btn-secondary:hover{background:#fff;color:#071a35}
.fr4-response{margin-top:22px;color:#aebdd3;font-family:var(--mono);font-size:11px;line-height:1.7;letter-spacing:.25px}
.fr4-hero-media{position:relative;min-width:0}
.fr4-hero-media:before{content:"ENGINEERING-LED REVIEW";position:absolute;left:-16px;top:22px;z-index:3;padding:8px 12px;border-left:3px solid var(--red-500);background:#fff;color:#071a35;font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:1px}
.fr4-hero-media img{display:block;width:100%;height:360px;object-fit:cover;border:1px solid rgba(255,255,255,.26);border-radius:14px;box-shadow:0 28px 70px rgba(0,0,0,.3)}
.fr4-hero-caption{position:absolute;left:0;right:0;bottom:0;padding:36px 20px 18px;border-radius:0 0 14px 14px;background:linear-gradient(transparent,rgba(4,17,37,.94));color:#fff;font-size:12px;line-height:1.5}

.fr4-proof{position:relative;z-index:4;margin-top:-1px;background:#fff;border-bottom:1px solid #d7dfeb}
.fr4-proof-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.fr4-proof-item{min-height:132px;padding:28px 24px;border-left:1px solid #d7dfeb}
.fr4-proof-item:last-child{border-right:1px solid #d7dfeb}
.fr4-proof-item b{display:block;color:var(--navy-950);font-family:var(--disp);font-size:25px;line-height:1.12}
.fr4-proof-item span{display:block;margin-top:9px;color:#607089;font-size:12.5px;line-height:1.5}
.fr4-proof-item em{display:block;margin-bottom:8px;color:var(--red-500);font-family:var(--mono);font-size:9.5px;font-style:normal;font-weight:600;letter-spacing:1.2px;text-transform:uppercase}

.fr4-fit{display:grid;grid-template-columns:minmax(360px,.92fr) minmax(0,1.08fr);gap:64px;align-items:stretch;margin-top:42px}
.fr4-fit-media{position:relative;min-height:520px;overflow:hidden;border-radius:18px;background:#dfe6ee}
.fr4-fit-media img{display:block;width:100%;height:100%;object-fit:cover}
.fr4-fit-media figcaption{position:absolute;left:0;right:0;bottom:0;padding:54px 22px 20px;background:linear-gradient(transparent,rgba(4,17,37,.92));color:#fff;font-size:12px}
.fr4-fit-list{display:grid;grid-template-columns:1fr 1fr;border:1px solid #d7dfeb;border-radius:18px;overflow:hidden;background:#fff}
.fr4-fit-item{min-height:250px;padding:30px;border-right:1px solid #d7dfeb;border-bottom:1px solid #d7dfeb}
.fr4-fit-item:nth-child(2n){border-right:0}
.fr4-fit-item:nth-last-child(-n+2){border-bottom:0}
.fr4-fit-item span{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:#edf2f7;color:var(--red-500);font-family:var(--mono);font-size:11px;font-weight:700}
.fr4-fit-item h3{margin-top:20px;color:var(--navy-950);font-family:var(--disp);font-size:20px;line-height:1.3}
.fr4-fit-item p{margin-top:10px;color:#56677f;font-size:14px;line-height:1.72}

.fr4-table-shell{margin-top:38px;overflow:hidden;border:1px solid #cfd9e6;border-radius:14px;background:#fff;box-shadow:0 18px 50px rgba(7,24,51,.07)}
.fr4-table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.fr4-cap-table{width:100%;min-width:820px;border-collapse:collapse;text-align:left}
.fr4-cap-table th{padding:18px 20px;background:#0a1e44;color:#fff;font-family:var(--disp);font-size:14px}
.fr4-cap-table th:nth-child(2){background:#102e61}
.fr4-cap-table th:nth-child(3){background:#d31920}
.fr4-cap-table td{padding:16px 20px;border-top:1px solid #dbe3ed;color:#42536c;font-size:13.5px;line-height:1.6;vertical-align:top}
.fr4-cap-table td:first-child{width:24%;color:#0a1e44;font-weight:800}
.fr4-cap-table tr:nth-child(even) td{background:#f8fafc}
.fr4-table-note{padding:16px 20px;border-top:1px solid #dbe3ed;background:#eef3f8;color:#52627a;font-size:12.5px;line-height:1.65}

.fr4-material{display:grid;grid-template-columns:minmax(0,1fr) minmax(390px,.88fr);gap:64px;align-items:center}
.fr4-material-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
.fr4-material-card{min-height:150px;padding:22px;border:1px solid #d7dfeb;border-radius:12px;background:#fff}
.fr4-material-card b{display:block;color:var(--navy-950);font-family:var(--disp);font-size:17px}
.fr4-material-card p{margin-top:9px;color:#596a82;font-size:13.5px;line-height:1.65}
.fr4-material-media{overflow:hidden;border:1px solid #d7dfeb;border-radius:18px;background:#fff;box-shadow:0 20px 56px rgba(7,24,51,.09)}
.fr4-material-media img{display:block;width:100%;height:410px;object-fit:cover}
.fr4-material-media figcaption{padding:15px 18px;color:#61718a;font-size:11.5px;line-height:1.55}

.fr4-engineering{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:70px;align-items:center}
.fr4-engineering-panel{border:1px solid rgba(255,255,255,.16);border-radius:16px;background:rgba(255,255,255,.045);overflow:hidden}
.fr4-engineering-row{display:grid;grid-template-columns:110px 1fr;gap:18px;padding:22px 24px;border-bottom:1px solid rgba(255,255,255,.12)}
.fr4-engineering-row:last-child{border-bottom:0}
.fr4-engineering-row b{color:#f3d27e;font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.8px}
.fr4-engineering-row span{color:#d6e0ef;font-size:14px;line-height:1.65}
.fr4-checks{display:grid;gap:13px;margin-top:28px;list-style:none}
.fr4-checks li{position:relative;padding-left:26px;color:#d3deed;font-size:14px;line-height:1.65}
.fr4-checks li:before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:#35d07f;box-shadow:0 0 0 4px rgba(53,208,127,.12)}

.fr4-process{display:grid;grid-template-columns:repeat(6,1fr);margin-top:40px;border:1px solid #d7dfeb;border-radius:16px;overflow:hidden;background:#fff}
.fr4-process-step{position:relative;min-height:210px;padding:25px 20px;border-right:1px solid #d7dfeb}
.fr4-process-step:last-child{border-right:0}
.fr4-process-step span{display:block;color:#d31920;font-family:var(--mono);font-size:11px;font-weight:700}
.fr4-process-step h3{margin-top:34px;color:var(--navy-950);font-family:var(--disp);font-size:17px;line-height:1.35}
.fr4-process-step p{margin-top:10px;color:#5b6b82;font-size:12.8px;line-height:1.65}
.fr4-process-step:after{content:"";position:absolute;left:20px;top:55px;width:34px;height:2px;background:#d7dfeb}

.fr4-builds{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.fr4-build{display:flex;flex-direction:column;overflow:hidden;border:1px solid #d7dfeb;border-radius:16px;background:#fff;box-shadow:0 12px 35px rgba(7,24,51,.055)}
.fr4-build-media{height:215px;overflow:hidden;background:#e7edf3}
.fr4-build-media img{display:block;width:100%;height:100%;object-fit:cover}
.fr4-build-body{display:flex;flex:1;flex-direction:column;padding:24px}
.fr4-build-label{color:#d31920;font-family:var(--mono);font-size:9.5px;font-weight:600;letter-spacing:1.2px;text-transform:uppercase}
.fr4-build h3{margin-top:10px;color:var(--navy-950);font-family:var(--disp);font-size:21px;line-height:1.3}
.fr4-build p{margin-top:10px;color:#596a82;font-size:13.5px;line-height:1.68}
.fr4-build dl{display:grid;grid-template-columns:92px 1fr;gap:8px 12px;margin-top:18px;padding-top:16px;border-top:1px solid #dbe3ed;font-size:12.5px;line-height:1.5}
.fr4-build dt{color:#0a1e44;font-weight:800}
.fr4-build dd{color:#5d6e86}

.fr4-finish-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:38px}
.fr4-finish{display:flex;flex-direction:column;overflow:hidden;padding:0;border:1px solid #d7dfeb;border-radius:14px;background:#fff}
.fr4-finish-media{height:150px;overflow:hidden;background:#eef2f7}
.fr4-finish-media img{display:block;width:100%;height:100%;object-fit:cover}
.fr4-finish-body{display:flex;flex:1;flex-direction:column;padding:22px 24px 24px}
.fr4-finish h3{color:var(--navy-950);font-family:var(--disp);font-size:18px}
.fr4-finish p{margin-top:10px;color:#5c6d84;font-size:13.5px;line-height:1.7}
.fr4-finish small{display:block;margin-top:auto;padding-top:14px;border-top:1px solid #e0e6ee;color:#d31920;font-family:var(--mono);font-size:10.5px;line-height:1.5}

.fr4-quote{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(330px,.92fr);gap:24px;margin-top:40px}
.fr4-quote-list{display:grid;grid-template-columns:1fr 1fr;border:1px solid #d7dfeb;border-radius:16px;overflow:hidden;background:#fff}
.fr4-quote-item{padding:23px;border-right:1px solid #d7dfeb;border-bottom:1px solid #d7dfeb}
.fr4-quote-item:nth-child(2n){border-right:0}
.fr4-quote-item:nth-last-child(-n+2){border-bottom:0}
.fr4-quote-item b{display:block;color:#0a1e44;font-size:14px}
.fr4-quote-item span{display:block;margin-top:7px;color:#607089;font-size:12.8px;line-height:1.6}
.fr4-quote-panel{display:flex;flex-direction:column;justify-content:center;padding:34px;border-radius:16px;background:#0a1e44;color:#fff}
.fr4-quote-panel h3{font-family:var(--disp);font-size:27px;line-height:1.25}
.fr4-quote-panel p{margin-top:13px;color:#c4d0e2;font-size:14px;line-height:1.7}
.fr4-quote-panel .fr4-hero-actions{margin-top:24px}
.fr4-trust-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14)}
.fr4-trust-links a{color:#dbe5f3;font-size:11.5px;font-weight:700;text-decoration:none;border-bottom:1px solid rgba(243,210,126,.45)}
.fr4-trust-links a:hover{color:#f3d27e}
.fr4-legacy-note{margin-top:24px;padding:16px 18px;border-left:3px solid #d31920;background:#fff;color:#586980;font-size:12.5px;line-height:1.7}

.fr4-page .faqwrap{max-width:940px}
.fr4-page .faqwrap .fr4-intro{margin-bottom:30px}
.fr4-final{padding:88px 0;background:linear-gradient(135deg,#071833,#10295c);text-align:center;color:#fff}
.fr4-final h2{max-width:800px;margin:0 auto;color:#fff;font-family:var(--disp);font-size:40px;line-height:1.16;letter-spacing:-.7px}
.fr4-final p{max-width:710px;margin:18px auto 28px;color:#c3cfe0;font-size:16px;line-height:1.7}
.fr4-final .fr4-hero-actions{justify-content:center;margin-top:0}

@media(max-width:1100px){
  .fr4-hero-grid{grid-template-columns:minmax(0,1fr) minmax(360px,.9fr);gap:38px}
  .fr4-hero h1{font-size:49px}
  .fr4-fit{gap:34px}
  .fr4-fit-item{padding:24px;min-height:235px}
  .fr4-material{gap:38px}
  .fr4-process{grid-template-columns:repeat(3,1fr)}
  .fr4-process-step{border-bottom:1px solid #d7dfeb}
  .fr4-process-step:nth-child(3){border-right:0}
  .fr4-process-step:nth-last-child(-n+3){border-bottom:0}
}

@media(max-width:900px){
  .fr4-section{padding:76px 0}
  .fr4-hero-grid{grid-template-columns:1fr 360px;gap:28px}
  .fr4-hero h1{font-size:43px}
  .fr4-hero-lead{font-size:16px}
  .fr4-hero-media img{height:320px}
  .fr4-proof-grid{grid-template-columns:1fr 1fr}
  .fr4-proof-item:nth-child(2){border-right:1px solid #d7dfeb}
  .fr4-proof-item:nth-child(-n+2){border-bottom:1px solid #d7dfeb}
  .fr4-fit,.fr4-material,.fr4-engineering{grid-template-columns:1fr}
  .fr4-fit-media{min-height:420px}
  .fr4-material-media{order:-1}
  .fr4-material-media img{height:360px}
  .fr4-builds{grid-template-columns:1fr 1fr}
  .fr4-build:last-child{grid-column:1/-1}
  .fr4-finish-grid{grid-template-columns:1fr 1fr}
  .fr4-quote{grid-template-columns:1fr}
}

@media(max-width:760px){
  .fr4-section{padding:62px 0}
  .fr4-title{font-size:32px;letter-spacing:-.5px}
  .fr4-intro{font-size:15.5px}
  .fr4-hero{height:auto;min-height:0;padding:58px 0 56px}
  .fr4-hero-grid{grid-template-columns:1fr;height:auto}
  .fr4-hero h1{font-size:42px;letter-spacing:-1.2px}
  .fr4-hero-media{margin-top:8px}
  .fr4-hero-media:before{left:12px;top:12px}
  .fr4-hero-media img{height:300px}
  .fr4-proof-item{min-height:118px;padding:22px 18px}
  .fr4-proof-item b{font-size:21px}
  .fr4-fit-media{min-height:330px}
  .fr4-fit-list{grid-template-columns:1fr}
  .fr4-fit-item{min-height:0;border-right:0;border-bottom:1px solid #d7dfeb!important}
  .fr4-fit-item:last-child{border-bottom:0!important}
  .fr4-material-grid{grid-template-columns:1fr}
  .fr4-engineering-row{grid-template-columns:1fr;gap:8px}
  .fr4-process{grid-template-columns:1fr 1fr}
  .fr4-process-step{border-right:1px solid #d7dfeb!important;border-bottom:1px solid #d7dfeb!important}
  .fr4-process-step:nth-child(2n){border-right:0!important}
  .fr4-process-step:nth-last-child(-n+2){border-bottom:0!important}
  .fr4-builds,.fr4-finish-grid{grid-template-columns:1fr}
  .fr4-build:last-child{grid-column:auto}
  .fr4-quote-list{grid-template-columns:1fr}
  .fr4-quote-item{border-right:0!important;border-bottom:1px solid #d7dfeb!important}
  .fr4-quote-item:last-child{border-bottom:0!important}
  .fr4-final h2{font-size:32px}
}

@media(max-width:480px){
  .fr4-hero h1{font-size:36px}
  .fr4-hero-actions{align-items:stretch;flex-direction:column}
  .fr4-hero-actions .btn,.fr4-hero-actions .fr4-btn-secondary{width:100%;min-height:48px;text-align:center}
  .fr4-hero-media img{height:250px}
  .fr4-proof-grid{grid-template-columns:1fr}
  .fr4-proof-item{border-right:1px solid #d7dfeb;border-bottom:1px solid #d7dfeb!important}
  .fr4-proof-item:last-child{border-bottom:0!important}
  .fr4-fit-media{min-height:275px}
  .fr4-material-media img{height:270px}
  .fr4-process{grid-template-columns:1fr}
  .fr4-process-step{border-right:0!important;border-bottom:1px solid #d7dfeb!important}
  .fr4-process-step:last-child{border-bottom:0!important}
}

@media(prefers-reduced-motion:reduce){
  .fr4-page *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}

/* 2026-07 FR4 capability-page refinement: page-specific only, no shared CSS change. */
.fr4-page #capability{padding-top:74px}
.fr4-page #capability .fr4-title{max-width:940px}
.fr4-page #capability .fr4-intro{max-width:900px}
.fr4-page #capability .fr4-table-shell{margin-top:32px;border-top:4px solid #d31920}
.fr4-page #capability .fr4-cap-table th{font-size:13px;letter-spacing:.2px}
.fr4-page #capability .fr4-cap-table td{font-size:13.2px}
.fr4-page #process .fr4-process-step{min-height:188px}
.fr4-page #process .fr4-process-step h3{margin-top:28px}
.fr4-page #build-profiles .fr4-build-media{height:205px}
.fr4-page #build-profiles .fr4-build p{min-height:68px}
.fr4-page #build-profiles .fr4-build dl{margin-top:auto}
.fr4-page #surface-finish .fr4-finish{min-height:392px}
.fr4-page #materials .fr4-material{align-items:stretch}
.fr4-page #materials .fr4-material-media{display:flex;flex-direction:column;height:100%}
.fr4-page #materials .fr4-material-media img{flex:1;height:auto;min-height:0}
.fr4-page #materials .fr4-material-media figcaption{flex:0 0 auto}

@media(max-width:900px){
  .fr4-page #capability{padding-top:64px}
  .fr4-page #build-profiles .fr4-build p{min-height:0}
  .fr4-page #materials .fr4-material-media{height:auto}
  .fr4-page #materials .fr4-material-media img{height:360px;flex:none}
}

@media(max-width:480px){
  .fr4-page #capability .fr4-table-shell{border-top-width:3px}
  .fr4-page #materials .fr4-material-media img{height:270px}
}

/* Same-category PCB product hero standard, aligned with the approved Metal Core first screen. */
.fr4-hero-grid{grid-template-columns:minmax(0,1fr) minmax(420px,.95fr);gap:58px}
.fr4-hero h1{max-width:620px;font-size:clamp(42px,3.45vw,56px);line-height:1.08;display:-webkit-box;max-height:2.16em;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2}
.fr4-hero-lead{max-width:600px;line-height:1.61;display:-webkit-box;max-height:6.44em;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:4}
.fr4-hero-media{position:relative;min-width:0;height:404px;min-height:404px;padding:20px 22px 22px;border:1px solid rgba(255,255,255,.2);border-radius:16px;background:#fff;box-shadow:0 28px 70px rgba(0,0,0,.28)}
.fr4-hero-media:before{left:0;top:20px;background:#10233d;color:#fff}
.fr4-hero-media img{width:100%;height:260px;margin-top:44px;border:0;border-radius:10px;background:#fff;object-fit:contain;box-shadow:none}
.fr4-hero-caption{position:static;padding:16px 0 0;border-radius:0;background:none;color:#52637b;font-size:12px;line-height:1.5}
@media(max-width:1100px){.fr4-hero-grid{grid-template-columns:minmax(0,1fr) minmax(360px,.9fr);gap:38px}.fr4-hero h1{font-size:clamp(40px,4.8vw,49px)}.fr4-hero-media{height:380px;min-height:380px}.fr4-hero-media img{height:240px}}
@media(max-width:760px){.fr4-hero-grid{grid-template-columns:1fr;height:auto}.fr4-hero-media{height:auto;min-height:0;margin-top:8px}.fr4-hero-media:before{left:12px;top:12px}.fr4-hero-media img{height:260px;margin-top:36px}.fr4-hero h1{font-size:42px}}
@media(max-width:480px){.fr4-hero h1{font-size:36px}.fr4-hero-media img{height:220px}}