:root{
  --ink:#0E1922;
  --ink2:#152431;
  --ink3:#1C2D3C;
  --paper:#EEF2F5;
  --white:#FFFFFF;
  --line:#D7DFE7;
  --line-soft:#E5EAEF;
  --text:#24333F;
  --body:#40515F;
  --muted:#7A8896;
  --accent:#E08A1B;
  --accent-deep:#C67510;
  --accent-soft:#FBF3E6;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:'Archivo',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',sans-serif;
}
#gc-aero *{margin:0;padding:0;box-sizing:border-box}
#gc-aero{font-family:var(--sans);color:var(--body);background:var(--white);line-height:1.65;-webkit-font-smoothing:antialiased;font-size:16px}
#gc-aero button,
#gc-aero input,
#gc-aero select,
#gc-aero textarea{font-family:var(--sans)}
#gc-aero img{max-width:100%;display:block}
#gc-aero a{color:inherit}
#gc-aero .skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:99}
#gc-aero .skip-link:focus{left:0}
#gc-aero :focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#gc-aero .wrap{max-width:1200px;margin:0 auto;padding:0 24px}
#gc-aero section{scroll-margin-top:72px}

/* ---------- topbar ---------- */
#gc-aero .topbar{background:var(--ink);color:#A9B6C2;font-family:var(--mono);font-size:12px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.08)}
#gc-aero .topbar .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
#gc-aero .crumbs a{color:#CFD8E1;text-decoration:none}
#gc-aero .crumbs a:hover{color:var(--accent)}
#gc-aero .crumbs span{opacity:.5;margin:0 6px}

/* ---------- nav ---------- */
#gc-aero .nav{position:sticky;top:0;z-index:50;background:rgba(14,25,34,.96);backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,.08)}
#gc-aero .nav .wrap{display:flex;align-items:center;gap:28px;height:60px}
#gc-aero .brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-height:44px}
#gc-aero .brand-mark{width:26px;height:26px;flex:none}
#gc-aero .brand-name{font-weight:800;letter-spacing:.14em;color:#fff;font-size:15px}
#gc-aero .brand-name em{font-style:normal;color:var(--accent)}
#gc-aero .nav-links{display:flex;gap:22px;margin-left:auto;list-style:none}
#gc-aero .nav-links a{color:#C7D2DC;text-decoration:none;font-size:13.5px;font-weight:500}
#gc-aero .nav-links a:hover{color:var(--accent)}
#gc-aero .nav-cta{font-family:var(--mono);font-size:12.5px;font-weight:600;color:#0E1922;background:var(--accent);padding:9px 16px;border-radius:2px;text-decoration:none;letter-spacing:.02em;display:inline-flex;align-items:center;min-height:44px}
#gc-aero .nav-cta:hover{background:#F19A2E}
#gc-aero .nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.25);color:#fff;font-family:var(--mono);font-size:12px;padding:8px 12px;border-radius:2px;cursor:pointer;min-height:44px;min-width:44px}

/* ---------- hero ---------- */
#gc-aero .hero{background:var(--ink);color:#E6EDF3;position:relative;overflow:hidden}
#gc-aero .hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:44px 44px;pointer-events:none}
#gc-aero .hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;padding-top:72px;padding-bottom:84px;align-items:center}
#gc-aero .hero-kicker{font-family:var(--mono);font-size:12.5px;color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin-bottom:18px;display:flex;align-items:center;gap:12px}
#gc-aero .hero-kicker::before{content:"";width:34px;height:1px;background:var(--accent)}
#gc-aero .hero h2{font-size:clamp(30px,4vw,48px);line-height:1.12;color:#fff;font-weight:800;letter-spacing:-.01em;max-width:14em}
#gc-aero .hero-lead{margin-top:20px;font-size:17px;color:#B9C6D1;max-width:56ch}
#gc-aero .hero-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
#gc-aero .chip{font-family:var(--mono);font-size:12px;color:#D7E0E8;border:1px solid rgba(255,255,255,.22);padding:6px 11px;border-radius:2px}
#gc-aero .chip b{color:var(--accent);font-weight:600}
#gc-aero .hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
#gc-aero .btn{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:15px;padding:15px 26px;border-radius:2px;text-decoration:none;cursor:pointer;border:1px solid transparent;transition:background .15s,border-color .15s,color .15s}
#gc-aero .btn-primary{background:var(--accent);color:#0E1922}
#gc-aero .btn-primary:hover{background:#F19A2E}
#gc-aero .btn-ghost{background:transparent;color:#E6EDF3;border-color:rgba(255,255,255,.35)}
#gc-aero .btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
#gc-aero .hero-note{margin-top:22px;font-family:var(--mono);font-size:11.5px;color:#8FA0AE}
#gc-aero .hero-note span{color:var(--accent)}

/* hero image plate */
#gc-aero .plate{position:relative;background:#fff;border:1px solid #D7DFE7;padding:18px 18px 14px;box-shadow:0 30px 60px -30px rgba(0,0,0,.55)}
#gc-aero .plate::before,
#gc-aero .plate::after{content:"";position:absolute;width:16px;height:16px;border:2px solid var(--accent)}
#gc-aero .plate::before{top:-2px;left:-2px;border-right:none;border-bottom:none}
#gc-aero .plate::after{bottom:-2px;right:-2px;border-left:none;border-top:none}
#gc-aero .plate-fig{background:#F5F7F9}
#gc-aero .img-frame{position:relative;overflow:hidden;background:#F2F5F7}
#gc-aero .img-frame img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
#gc-aero .ar-43{padding-top:75%}
#gc-aero .ar-169{padding-top:56.25%}
#gc-aero .plate-cap{display:flex;justify-content:space-between;gap:12px;align-items:baseline;margin-top:12px;font-family:var(--mono);font-size:11px;color:#7A8896}
#gc-aero .plate-cap b{color:#24333F;font-weight:600}
#gc-aero .plate-dims{display:flex;justify-content:space-between;margin-top:10px;border-top:1px dashed #C7D1DA;padding-top:10px;font-family:var(--mono);font-size:10.5px;color:#8A97A4}

/* ---------- spec strip ---------- */
#gc-aero .specstrip{background:var(--paper);border-bottom:1px solid var(--line)}
#gc-aero .specstrip .wrap{display:grid;grid-template-columns:repeat(6,1fr);gap:0}
#gc-aero .spec{position:relative;padding:26px 22px 24px;border-right:1px solid var(--line)}
#gc-aero .spec:last-child{border-right:none}
#gc-aero .spec-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
#gc-aero .spec-value{font-family:var(--mono);font-size:15px;font-weight:600;color:var(--text);line-height:1.4}
#gc-aero .spec-sub{font-size:12px;color:var(--muted);margin-top:4px}
#gc-aero .spec-foot{padding:10px 22px 14px;font-family:var(--mono);font-size:10.5px;color:var(--muted);border-top:1px solid var(--line)}

/* ---------- sections ---------- */
#gc-aero .sec{padding:84px 0}
#gc-aero .sec.paper{background:var(--paper)}
#gc-aero .sec.dark{background:var(--ink);color:#C7D2DC}
#gc-aero .sec-head{margin-bottom:46px;max-width:820px}
#gc-aero .sec-kicker{font-family:var(--mono);font-size:12px;color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;display:flex;align-items:center;gap:12px}
#gc-aero .sec-kicker::before{content:"";width:26px;height:1px;background:var(--accent)}
#gc-aero .sec h3{font-size:clamp(24px,2.6vw,34px);font-weight:800;color:var(--ink);line-height:1.18;letter-spacing:-.01em}
#gc-aero .sec.dark h3{color:#fff}
#gc-aero .sec-lead{margin-top:16px;font-size:16.5px;color:var(--body);max-width:70ch}
#gc-aero .sec.dark .sec-lead{color:#A9B6C2}
#gc-aero .hair{height:1px;background:var(--line);border:none;margin:0}

/* section 01 overview */
#gc-aero .overview-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:start}
#gc-aero .overview-copy p{margin-bottom:18px;font-size:16px}
#gc-aero .overview-copy p:last-child{margin-bottom:0}
#gc-aero .summary-card{border:1px solid var(--line);background:#fff;position:relative}
#gc-aero .summary-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent)}
#gc-aero .summary-head{padding:18px 24px;border-bottom:1px solid var(--line-soft);display:flex;justify-content:space-between;align-items:center;gap:12px}
#gc-aero .summary-head b{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--text)}
#gc-aero .summary-head span{font-family:var(--mono);font-size:10.5px;color:var(--muted)}
#gc-aero .summary-rows{display:grid}
#gc-aero .summary-row{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:13px 24px;border-bottom:1px solid var(--line-soft);font-size:14px}
#gc-aero .summary-row:last-child{border-bottom:none}
#gc-aero .summary-row .k{font-family:var(--mono);font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;padding-top:2px}
#gc-aero .summary-row .v{color:var(--text);font-weight:500}

/* section 02 why 5-axis */
#gc-aero .why-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
#gc-aero .benefit{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12)}
#gc-aero .benefit:last-child{border-bottom:1px solid rgba(255,255,255,.12)}
#gc-aero .benefit-num{font-family:var(--mono);font-size:13px;color:var(--accent);font-weight:600;padding-top:3px}
#gc-aero .benefit b{display:block;color:#fff;font-size:16.5px;font-weight:700;margin-bottom:5px}
#gc-aero .benefit p{font-size:14px;color:#9FB0BE;line-height:1.6}
#gc-aero .schematic-box{border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.03);padding:18px}
#gc-aero .schematic-title{font-family:var(--mono);font-size:11px;color:#8FA0AE;text-transform:uppercase;letter-spacing:.08em;display:flex;justify-content:space-between;gap:10px;margin-bottom:12px}
#gc-aero .schematic-title span{color:var(--accent)}
#gc-aero .schematic-box svg{width:100%;height:auto;display:block}
#gc-aero .schematic-note{font-family:var(--mono);font-size:10.5px;color:#7E8E9C;margin-top:12px}

/* section 03 material */
#gc-aero .mat-top{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:start;margin-bottom:56px}
#gc-aero .mat-primary{border:1px solid var(--line);background:#fff;padding:28px;position:relative;overflow:hidden}
#gc-aero .mat-primary::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent)}
#gc-aero .mat-primary h4{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
#gc-aero .mat-alloy-name{font-family:var(--mono);font-size:22px;font-weight:600;color:var(--ink);margin-bottom:12px}
#gc-aero .mat-primary p{font-size:14.5px}
#gc-aero .trace{border:1px solid var(--line);background:var(--ink);color:#C7D2DC;padding:28px}
#gc-aero .trace h4{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
#gc-aero .trace p{font-size:14px;color:#A9B6C2;margin-bottom:16px}
#gc-aero .trace ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}
#gc-aero .trace li{font-family:var(--mono);font-size:12.5px;color:#D7E0E8;padding-left:18px;position:relative}
#gc-aero .trace li::before{content:"";position:absolute;left:0;top:8px;width:8px;height:2px;background:var(--accent)}
#gc-aero .chart-wrap{background:#fff;border:1px solid var(--line);padding:24px 24px 12px;margin-bottom:40px}
#gc-aero .chart-title{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--text);margin-bottom:4px}
#gc-aero .chart-note{font-size:12.5px;color:var(--muted);margin-bottom:8px}
#gc-aero .chart-box{width:100%;max-width:880px}
#gc-aero .chart-box svg{width:100%;height:auto;display:block}

/* tables */
#gc-aero .tbl-wrap{overflow-x:auto;border:1px solid var(--line);background:#fff}
#gc-aero table.tbl{width:100%;border-collapse:collapse;table-layout:fixed}
#gc-aero table.tbl th{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);background:var(--paper)}
#gc-aero table.tbl td{padding:14px 18px;font-size:14px;border-bottom:1px solid var(--line-soft);color:var(--body);vertical-align:top}
#gc-aero table.tbl tr:last-child td{border-bottom:none}
#gc-aero table.tbl td.alloy{font-family:var(--mono);font-size:13.5px;font-weight:600;color:var(--ink)}

/* section 04 design */
#gc-aero .design-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:18px}
#gc-aero .design-card{border:1px solid var(--line);background:#fff;padding:26px 24px;display:flex;flex-direction:column;gap:10px;transition:border-color .15s}
#gc-aero .design-card:hover{border-color:var(--accent)}
#gc-aero .design-card .d-num{font-family:var(--mono);font-size:11.5px;color:var(--accent);font-weight:600}
#gc-aero .design-card h4{font-size:16.5px;font-weight:700;color:var(--ink)}
#gc-aero .design-card p{font-size:14px}
#gc-aero .design-img{border:1px solid var(--line);background:#fff;padding:10px 10px 0}
#gc-aero .design-img figcaption,
#gc-aero .img-cap{font-family:var(--mono);font-size:11px;color:var(--muted);padding:12px 6px 8px}

/* section 05 process */
#gc-aero .steps{display:grid;grid-template-columns:repeat(7,1fr);gap:0;margin-top:10px;position:relative}
#gc-aero .steps::before{content:"";position:absolute;top:23px;left:4%;right:4%;height:1px;background:var(--line)}
#gc-aero .step{position:relative;text-align:left;padding-top:58px}
#gc-aero .step::before{content:"";position:absolute;top:14px;left:0;width:18px;height:18px;border-radius:50%;background:var(--ink);border:3px solid var(--paper);z-index:1}
#gc-aero .step b{display:block;font-family:var(--mono);font-size:11px;color:var(--accent);margin-bottom:6px}
#gc-aero .step h4{font-size:14.5px;color:var(--ink);font-weight:700;margin-bottom:6px;line-height:1.35}
#gc-aero .step p{font-size:12.5px;color:var(--muted);line-height:1.55}
#gc-aero .step.last::after{content:"";position:absolute;top:14px;right:0;width:18px;height:18px;border-radius:50%;background:var(--accent);z-index:1}
#gc-aero .step.last::before{background:var(--accent)}
#gc-aero .dfm-note{margin-top:34px;font-family:var(--mono);font-size:12px;color:var(--muted);border-left:3px solid var(--accent);padding:12px 18px;background:#fff;border:1px solid var(--line);border-left-width:3px}

/* section 06 quality */
#gc-aero .quality-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:18px}
#gc-aero .quality-card{border:1px solid var(--line);background:#fff;padding:24px}
#gc-aero .quality-card h4{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:8px}
#gc-aero .quality-card p{font-size:13.5px}
#gc-aero .quality-img-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:stretch}
#gc-aero .quality-img{border:1px solid var(--line);background:#fff;padding:10px 10px 0}
#gc-aero .quality-aside{border:1px solid var(--line);background:var(--ink);color:#C7D2DC;padding:26px 26px 20px;display:flex;flex-direction:column;gap:10px}
#gc-aero .quality-aside h4{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
#gc-aero .quality-aside ul{list-style:none}
#gc-aero .quality-aside li{font-family:var(--mono);font-size:12.5px;color:#D7E0E8;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.1);padding-left:18px;position:relative}
#gc-aero .quality-aside li:last-child{border-bottom:none}
#gc-aero .quality-aside li::before{content:"";position:absolute;left:0;top:15px;width:8px;height:2px;background:var(--accent)}

/* section 07 finishing */
#gc-aero .finish-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;align-items:start}
#gc-aero .finish-img{border:1px solid var(--line);background:#fff;padding:10px 10px 0}
#gc-aero .proc-fig{max-width:840px;margin:38px auto 0;border:1px solid var(--line);background:#fff;padding:10px 10px 0}
#gc-aero .proc-fig figcaption{font-family:var(--mono);font-size:11px;color:var(--muted);padding:12px 6px 8px}

/* section 08 applications */
#gc-aero .app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
#gc-aero .app-card{border:1px solid var(--line);background:#fff;padding:26px}
#gc-aero .app-card h4{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:10px}
#gc-aero .app-card ul{list-style:none}
#gc-aero .app-card li{font-size:14px;color:var(--body);padding:7px 0 7px 20px;position:relative;border-bottom:1px dashed var(--line-soft)}
#gc-aero .app-card li:last-child{border-bottom:none}
#gc-aero .app-card li::before{content:"";position:absolute;left:0;top:15px;width:10px;height:2px;background:var(--accent)}

/* section 09 buyers */
#gc-aero .buyers-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
#gc-aero .buyer-card{border:1px solid var(--line);background:#fff;padding:24px}
#gc-aero .buyer-card .b-idx{font-family:var(--mono);font-size:11px;color:var(--accent);font-weight:600;margin-bottom:10px}
#gc-aero .buyer-card h4{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:10px}
#gc-aero .buyer-card ul{list-style:none}
#gc-aero .buyer-card li{font-size:13px;color:var(--body);padding:5px 0 5px 16px;position:relative}
#gc-aero .buyer-card li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:2px;background:var(--accent)}

/* section 10 case */
#gc-aero .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
#gc-aero .case-flow{border:1px solid var(--line);background:#fff}
#gc-aero .case-flow .cf-row{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:16px 22px;border-bottom:1px solid var(--line-soft);font-size:14px}
#gc-aero .case-flow .cf-row:last-child{border-bottom:none}
#gc-aero .case-flow .cf-k{font-family:var(--mono);font-size:11.5px;color:var(--accent);text-transform:uppercase;letter-spacing:.06em;padding-top:2px}
#gc-aero .case-flow .cf-v{color:var(--text)}

/* section 11 quote */
#gc-aero .quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
#gc-aero .quote-list{counter-reset:ql}
#gc-aero .quote-item{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:16px 0;border-top:1px solid var(--line-soft)}
#gc-aero .quote-item:last-child{border-bottom:1px solid var(--line-soft)}
#gc-aero .quote-item .q-num{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--accent)}
#gc-aero .quote-item b{display:block;color:var(--ink);font-size:15px;font-weight:700;margin-bottom:4px}
#gc-aero .quote-item p{font-size:13.5px}
#gc-aero form.quote-form{border:1px solid var(--line);background:#fff;padding:28px}
#gc-aero .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
#gc-aero .f-field{display:flex;flex-direction:column;gap:6px}
#gc-aero .f-field.full{grid-column:1/-1}
#gc-aero .f-field label{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
#gc-aero .f-field input,
#gc-aero .f-field select,
#gc-aero .f-field textarea{font-family:var(--sans);font-size:14px;color:var(--text);padding:11px 13px;border:1px solid var(--line);border-radius:2px;background:#fff}
#gc-aero .f-field input:focus,
#gc-aero .f-field select:focus,
#gc-aero .f-field textarea:focus{outline:none;border-color:var(--accent)}
#gc-aero .f-field textarea{min-height:90px;resize:vertical}
#gc-aero .f-field input[type=file]{padding:9px;font-size:12.5px;color:var(--muted)}
#gc-aero .form-note{font-size:12px;color:var(--muted);margin-top:14px}
#gc-aero .form-msg{margin-top:14px;font-family:var(--mono);font-size:12.5px;color:#0E1922;background:var(--accent-soft);border:1px solid #EDD5A8;padding:12px 14px;display:none}
#gc-aero .form-msg.show{display:block}

/* section 12 faq */
#gc-aero .faq{border-top:1px solid var(--line)}
#gc-aero .faq details{border-bottom:1px solid var(--line-soft)}
#gc-aero .faq summary{list-style:none;cursor:pointer;padding:20px 48px 20px 0;position:relative;font-size:16px;font-weight:600;color:var(--ink)}
#gc-aero .faq summary::-webkit-details-marker{display:none}
#gc-aero .faq summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-family:var(--mono);font-size:20px;color:var(--accent);font-weight:400}
#gc-aero .faq details[open] summary::after{content:"\2013"}
#gc-aero .faq .faq-a{padding:0 0 22px;max-width:76ch;font-size:14.5px;color:var(--body)}

/* cta band */
#gc-aero .cta-band{background:var(--ink);color:#E6EDF3;position:relative;overflow:hidden}
#gc-aero .cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:44px 44px}
#gc-aero .cta-inner{position:relative;padding:96px 0;text-align:center;max-width:720px;margin:0 auto}
#gc-aero .cta-inner h3{color:#fff;font-size:clamp(26px,3vw,38px);font-weight:800;line-height:1.15}
#gc-aero .cta-inner p{margin-top:18px;color:#A9B6C2;font-size:16px}
#gc-aero .cta-actions{display:flex;gap:14px;justify-content:center;margin-top:34px;flex-wrap:wrap}

/* footer */
#gc-aero .footer{background:#0A121A;color:#8FA0AE;padding:56px 0 32px;border-top:1px solid rgba(255,255,255,.08)}
#gc-aero .footer .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:48px}
#gc-aero .footer h4{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:#C7D2DC;margin-bottom:16px}
#gc-aero .footer p{font-size:13.5px;max-width:46ch}
#gc-aero .footer ul{list-style:none}
#gc-aero .footer li{margin-bottom:9px}
#gc-aero .footer a{font-size:13.5px;text-decoration:none;color:#9FB0BE}
#gc-aero .footer a:hover{color:var(--accent)}
#gc-aero .footer .f-bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:var(--mono);font-size:11px;color:#6E7E8C}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  #gc-aero .specstrip .wrap{grid-template-columns:repeat(3,1fr)}
  #gc-aero .spec:nth-child(3){border-right:none}
  #gc-aero .spec:nth-child(n+4){border-top:1px solid var(--line)}
  #gc-aero .buyers-grid{grid-template-columns:repeat(2,1fr)}
  #gc-aero .steps{grid-template-columns:repeat(4,1fr);row-gap:10px}
  #gc-aero .steps::before{display:none}
  #gc-aero .step::before{display:none}
  #gc-aero .step{padding-top:0}
  #gc-aero .step.last::after{display:none}
  #gc-aero .step{background:#fff;border:1px solid var(--line);padding:18px;margin-bottom:0}
}
@media (max-width:900px){
  #gc-aero .hero .wrap{grid-template-columns:1fr;gap:44px;padding-top:52px}
  #gc-aero .overview-grid,
  #gc-aero .why-grid,
  #gc-aero .mat-top,
  #gc-aero .case-grid,
  #gc-aero .quote-grid,
  #gc-aero .quality-img-wrap,
  #gc-aero .finish-grid{grid-template-columns:1fr}
  #gc-aero .design-grid,
  #gc-aero .quality-grid,
  #gc-aero .app-grid{grid-template-columns:repeat(2,1fr)}
  #gc-aero .nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:var(--ink);flex-direction:column;gap:0;padding:12px 24px 20px;border-bottom:1px solid rgba(255,255,255,.1)}
  #gc-aero .nav-links.open{display:flex}
  #gc-aero .nav-links a{padding:11px 0;border-bottom:1px solid rgba(255,255,255,.07)}
  #gc-aero .nav-toggle{display:block}
  #gc-aero .footer .wrap{grid-template-columns:1fr}
}
@media (max-width:640px){
  #gc-aero .topbar .wrap{flex-direction:column;align-items:flex-start;gap:4px}
  #gc-aero .topbar{font-size:12.5px}
  #gc-aero .steps{grid-template-columns:1fr}
  #gc-aero .chip{font-size:13px}
  #gc-aero .hero-kicker{font-size:13px}
  #gc-aero .hero-note{font-size:12.5px}
  #gc-aero .specstrip .wrap{grid-template-columns:repeat(2,1fr)}
  #gc-aero .spec:nth-child(2){border-right:none}
  #gc-aero .spec:nth-child(3){border-top:1px solid var(--line)}
  #gc-aero .spec:nth-child(n+4){border-top:1px solid var(--line)}
  #gc-aero .design-grid,
  #gc-aero .quality-grid,
  #gc-aero .app-grid,
  #gc-aero .buyers-grid{grid-template-columns:1fr}
  #gc-aero .summary-row{grid-template-columns:1fr;gap:6px}
  #gc-aero .form-grid{grid-template-columns:1fr}
  #gc-aero .f-field input,
  #gc-aero .f-field select,
  #gc-aero .f-field textarea{font-size:16px}
  #gc-aero .trace ul{grid-template-columns:1fr}
  #gc-aero .sec{padding:60px 0}
  #gc-aero .plate-dims{display:none}
}
@media (prefers-reduced-motion:reduce){
  #gc-aero *{transition:none!important}
}
#gc-aero .cta-card{background:#0E1922;color:#C7D2DC;padding:40px 36px;position:relative;overflow:hidden;border-top:3px solid #E08A1B}
#gc-aero .cta-card .cta-kicker{font-family:'IBM Plex Mono',monospace;font-size:12px;color:#E08A1B;letter-spacing:.08em;text-transform:uppercase}
#gc-aero .cta-card h4{font-size:22px;color:#fff;margin:12px 0;font-weight:800;line-height:1.25}
#gc-aero .cta-card p{font-size:14.5px;color:#A9B6C2;max-width:46ch}
#gc-aero .cta-card-actions{display:flex;flex-direction:column;gap:12px;margin:26px 0 22px}
#gc-aero .cta-card-actions .btn{display:inline-flex;align-items:center;justify-content:center}
#gc-aero .cta-perks{list-style:none;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;display:grid;gap:8px;margin:0}
#gc-aero .cta-perks li{font-family:'IBM Plex Mono',monospace;font-size:12px;color:#D7E0E8;padding-left:16px;position:relative}
#gc-aero .cta-perks li::before{content:"";position:absolute;left:0;top:8px;width:8px;height:2px;background:#E08A1B}
@media (max-width:640px){#gc-aero .cta-card{padding:32px 24px}}