/* ============================================================
   Goldcattle — Vertical Turning Center (VTC) Technical Guide
   Independent stylesheet · namespace .gvt-
   Theme: engineering blueprint / technical-drawing editorial
   ============================================================ */
:root{
  --gvt-ink:#16242f;
  --gvt-ink-soft:#3f5263;
  --gvt-faint:#71849a;
  --gvt-blue:#143c6e;
  --gvt-blue-2:#1d5a96;
  --gvt-blue-3:#2f74b8;
  --gvt-blue-lt:#e8eff7;
  --gvt-blue-line:#cddcec;
  --gvt-orange:#d9481f;
  --gvt-orange-lt:#f0a078;
  --gvt-paper:#f4f6f9;
  --gvt-card:#ffffff;
  --gvt-line:#dbe3ec;
  --gvt-line-soft:#e9eef4;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--gvt-paper);color:var(--gvt-ink);font-family:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:#1d5a96;text-decoration:none}
a:hover{text-decoration:underline}
b,strong{font-weight:700}
.gvt-page{overflow:hidden}

/* ---------- containers ---------- */
.gvt-wide{max-width:1240px;margin:0 auto;padding:0 32px}
.gvt-body{max-width:900px;margin:0 auto;padding:0 32px}
.gvt-section{padding:64px 0}
.gvt-section--tint{background:#fff}

/* ---------- masthead (blueprint) ---------- */
.gvt-masthead{background:
  linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px),
  linear-gradient(135deg,#174a82 0%,#0f3260 55%,#0b2850 100%);
  background-size:28px 28px,28px 28px,100% 100%;
  color:#eaf1f8;position:relative;overflow:hidden}
.gvt-masthead::after{content:"";position:absolute;right:-140px;bottom:-180px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(217,72,31,.20),transparent 60%);pointer-events:none}
.gvt-masthead .gvt-wide{position:relative;padding-top:72px;padding-bottom:72px}
.gvt-breadcrumbs{font-size:12.5px;letter-spacing:.06em;color:#9db8d2;margin-bottom:22px}
.gvt-breadcrumbs a{color:#cfe0f0}
.gvt-kicker{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:#ffd8bd;border:1px solid rgba(255,180,130,.5);border-radius:4px;padding:5px 14px;margin-bottom:22px;background:rgba(217,72,31,.16)}
.gvt-masthead h2{font-size:clamp(29px,4.2vw,48px);line-height:1.1;letter-spacing:-.015em;color:#fff;max-width:960px;margin-bottom:20px}
.gvt-deck{font-size:17px;color:#bcd2e6;max-width:800px;margin-bottom:28px}
.gvt-byline{display:flex;flex-wrap:wrap;gap:8px 28px;font-size:12.5px;color:#8fabc8;border-top:1px solid rgba(255,255,255,.14);padding-top:18px}
.gvt-byline b{color:#e3edf6;font-weight:700;letter-spacing:.04em}
.gvt-byline span{display:inline-flex;align-items:center;gap:6px}

/* ---------- hero band image ---------- */
.gvt-hero-band{max-width:1240px;margin:0 auto;padding:0 32px;margin-top:-36px;position:relative;z-index:2}
.gvt-hero-band img{width:100%;height:340px;object-fit:cover;border-radius:14px;border:1px solid var(--gvt-line);box-shadow:0 18px 40px -22px rgba(15,40,80,.45)}
.gvt-hero-cap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px 20px;font-size:12.5px;color:var(--gvt-faint);margin-top:10px;padding:0 4px}
.gvt-hero-cap b{color:var(--gvt-blue)}

/* ---------- quick answer ---------- */
.gvt-answer{background:var(--gvt-blue-lt);border:1px solid var(--gvt-blue-line);border-left:5px solid var(--gvt-orange);border-radius:0 12px 12px 0;padding:28px 32px;margin:0 0 40px}
.gvt-answer .gvt-qa-label{display:block;font-size:11.5px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--gvt-orange);margin-bottom:10px}
.gvt-answer p{font-size:16px;line-height:1.7;color:#26384a}
.gvt-answer p + p{margin-top:10px}

/* ---------- typography ---------- */
.gvt-section h2{font-size:clamp(23px,2.8vw,32px);line-height:1.22;letter-spacing:-.012em;color:var(--gvt-ink);margin-bottom:14px;display:flex;align-items:baseline;gap:14px}
.gvt-section h2::before{content:attr(data-no);font-size:13px;font-weight:800;letter-spacing:.1em;color:#fff;background:var(--gvt-blue);border-radius:4px;padding:4px 9px;flex:none;transform:translateY(-2px)}
.gvt-section h3{font-size:18.5px;color:var(--gvt-blue);margin:24px 0 8px}
.gvt-lede{font-size:16.5px;color:var(--gvt-ink-soft);max-width:820px;margin-bottom:26px}
.gvt-body p{font-size:15.5px;color:#33465a;margin-bottom:16px}

/* ---------- figures ---------- */
.gvt-figure{margin:34px 0;background:#fff;border:1px solid var(--gvt-blue-line);border-radius:12px;padding:18px}
.gvt-figure img{border-radius:8px;width:100%}
.gvt-figure figcaption{font-size:12.5px;color:var(--gvt-faint);margin-top:12px;line-height:1.55}
.gvt-figure figcaption b{color:var(--gvt-blue)}
.gvt-figure--duo{display:grid;grid-template-columns:1.3fr 1fr;gap:14px;align-items:stretch}
.gvt-figure--duo .gvt-duo-item{display:flex;flex-direction:column}
.gvt-figure--duo .gvt-duo-item img{flex:1;object-fit:cover;height:100%}

/* ---------- reason cards (3-col) ---------- */
.gvt-reasons{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:8px}
.gvt-reason{background:#fff;border:1px solid var(--gvt-line);border-top:3px solid var(--gvt-blue-2);border-radius:10px;padding:20px 22px}
.gvt-reason h3{margin:0 0 6px;font-size:15px;color:var(--gvt-ink)}
.gvt-reason p{font-size:13.5px;color:var(--gvt-ink-soft);margin:0;line-height:1.6}
.gvt-reason--hot{border-top-color:var(--gvt-orange)}
.gvt-reason--hot h3{color:var(--gvt-orange)}

/* ---------- tables ---------- */
.gvt-table-wrap{background:#fff;border:1px solid var(--gvt-blue-line);border-radius:12px;overflow:hidden;overflow-x:auto;margin:22px 0}
.gvt-table-wrap table{width:100%;border-collapse:collapse;min-width:640px}
.gvt-table-wrap th{background:var(--gvt-blue);color:#fff;text-align:left;padding:13px 20px;font-size:13px;letter-spacing:.04em}
.gvt-table-wrap th + th{background:var(--gvt-orange)}
.gvt-table-wrap td{padding:12px 20px;border-bottom:1px solid var(--gvt-line-soft);font-size:14px;vertical-align:top;color:var(--gvt-ink)}
.gvt-table-wrap tr:last-child td{border-bottom:none}
.gvt-table-wrap td:first-child{font-weight:700;color:var(--gvt-blue);white-space:nowrap}
.gvt-table-wrap tbody tr:nth-child(even){background:#f3f7fb}

/* ---------- chips ---------- */
.gvt-chips{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.gvt-chip{background:#fff;border:1px solid var(--gvt-blue-line);border-radius:6px;padding:10px 18px;font-size:14px;font-weight:700;color:var(--gvt-ink);border-left:3px solid var(--gvt-blue-3)}
.gvt-chip::before{content:"◇";color:var(--gvt-orange);margin-right:8px;font-weight:900}

/* ---------- decision svg ---------- */
.gvt-decision{margin:26px 0;background:#fff;border:1px solid var(--gvt-blue-line);border-radius:12px;padding:14px}
.gvt-decision svg{width:100%;height:auto;display:block}
.gvt-decision-note{font-size:13px;color:var(--gvt-faint);margin-top:12px}

/* ---------- materials ---------- */
.gvt-mats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:8px}
.gvt-mat{background:#fff;border:1px solid var(--gvt-line);border-radius:8px;padding:15px 20px;display:flex;justify-content:space-between;gap:14px;align-items:baseline;border-left:3px solid var(--gvt-blue-2)}
.gvt-mat b{color:var(--gvt-blue);font-size:14.5px;white-space:nowrap}
.gvt-mat span{font-size:13px;color:var(--gvt-ink-soft);text-align:right}

/* ---------- process strip ---------- */
.gvt-process{display:flex;flex-wrap:wrap;gap:0;align-items:stretch;margin:26px 0;counter-reset:vp}
.gvt-process span{flex:1 1 100px;background:#fff;border:1px solid var(--gvt-blue-line);border-radius:8px;padding:14px 10px 12px;font-size:12.5px;font-weight:700;color:var(--gvt-ink);text-align:center;position:relative;margin:0 6px 6px 0}
.gvt-process span::before{counter-increment:vp;content:"STEP " counter(vp);display:block;font-size:10px;letter-spacing:.08em;color:var(--gvt-orange);font-weight:800;margin-bottom:4px}

/* ---------- industries ---------- */
.gvt-industries{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:8px}
.gvt-industry{background:#fff;border:1px solid var(--gvt-line);border-radius:10px;padding:20px 22px;box-shadow:0 1px 0 var(--gvt-blue-line)}
.gvt-industry h3{font-size:15px;margin:0 0 8px;color:var(--gvt-blue)}
.gvt-industry p{font-size:13px;color:var(--gvt-ink-soft);margin:0;line-height:1.6}

/* ---------- warning ---------- */
.gvt-warning{background:#fff5ef;border:1px solid #f0d4bf;border-left:5px solid var(--gvt-orange);border-radius:0 12px 12px 0;padding:26px 30px;margin-top:8px}
.gvt-warning h3{color:#b8431a;margin:0 0 10px}
.gvt-warning li{list-style:none;font-size:14px;color:var(--gvt-ink-soft);padding:7px 0 7px 26px;position:relative;border-bottom:1px dashed #f0dccb}
.gvt-warning li:last-child{border-bottom:none}
.gvt-warning li::before{content:"✕";position:absolute;left:0;color:#d9481f;font-weight:900}
.gvt-warning li b{color:var(--gvt-ink)}
.gvt-warning p{font-size:14px;color:var(--gvt-ink-soft);margin-top:10px}

/* ---------- checklist ---------- */
.gvt-check{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:8px}
.gvt-check-item{background:#fff;border:1px solid var(--gvt-line);border-radius:8px;padding:16px 20px;display:flex;gap:12px;align-items:baseline}
.gvt-check-item::before{content:"?";flex:none;width:24px;height:24px;border-radius:50%;background:var(--gvt-blue-lt);color:var(--gvt-blue);font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center}
.gvt-check-item b{display:block;font-size:14px;color:var(--gvt-ink);margin-bottom:2px}
.gvt-check-item span{font-size:12.5px;color:var(--gvt-faint)}

/* ---------- callout ---------- */
.gvt-callout{background:var(--gvt-blue-lt);border:1px solid var(--gvt-blue-line);border-left:4px solid var(--gvt-blue-2);border-radius:8px;padding:18px 24px;font-size:14.5px;color:var(--gvt-ink);margin:24px 0}
.gvt-callout b{color:var(--gvt-blue)}
.gvt-callout--orange{background:#fdf1e8;border-color:#f0d6c2;border-left-color:var(--gvt-orange)}
.gvt-callout--orange b{color:var(--gvt-orange)}

/* ---------- faq ---------- */
.gvt-faq details{background:#fff;border:1px solid var(--gvt-line);border-radius:8px;margin-bottom:10px;overflow:hidden}
.gvt-faq summary{cursor:pointer;padding:16px 20px;font-weight:700;font-size:15px;color:var(--gvt-ink);list-style:none;position:relative;padding-right:44px}
.gvt-faq summary::-webkit-details-marker{display:none}
.gvt-faq summary::after{content:"+";position:absolute;right:18px;top:11px;font-size:22px;color:var(--gvt-orange);font-weight:400;transition:transform .2s}
.gvt-faq details[open] summary::after{transform:rotate(45deg)}
.gvt-faq .gvt-answer{margin:0;border:none;border-left:none;background:transparent;border-top:1px solid var(--gvt-line-soft);border-radius:0}
.gvt-faq .gvt-answer p{font-size:14px;color:var(--gvt-ink-soft);padding-top:12px}

/* ---------- capability ---------- */
.gvt-capability{background:#fff;border:1px solid var(--gvt-blue-line);border-radius:12px;overflow:hidden;margin-top:8px}
.gvt-capability-head{background:var(--gvt-blue);color:#fff;font-weight:800;padding:14px 24px;font-size:14.5px;letter-spacing:.02em}
.gvt-capability-grid{display:grid;grid-template-columns:1fr 1fr}
.gvt-capability-cell{padding:24px}
.gvt-capability-cell:first-child{border-right:1px solid var(--gvt-line-soft);background:#f9fbfe}
.gvt-capability-cell ul{list-style:none}
.gvt-capability-cell li{font-size:13.5px;color:var(--gvt-ink-soft);padding:7px 0 7px 24px;position:relative;border-bottom:1px dashed var(--gvt-line-soft)}
.gvt-capability-cell li:last-child{border-bottom:none}
.gvt-capability-cell li::before{content:"✓";position:absolute;left:0;color:var(--gvt-blue-2);font-weight:800}
.gvt-capability-cell p{font-size:13px;color:var(--gvt-faint);margin:10px 0 0}

/* ---------- related ---------- */
.gvt-rel{display:flex;flex-wrap:wrap;gap:10px}
.gvt-rel a{background:#fff;border:1px solid var(--gvt-blue-line);border-radius:6px;padding:9px 18px;font-size:13.5px;font-weight:600;color:var(--gvt-blue);transition:all .15s}
.gvt-rel a:hover{background:var(--gvt-blue);color:#fff;text-decoration:none;border-color:var(--gvt-blue)}

/* ---------- final cta ---------- */
.gvt-final{background:
  linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px),
  linear-gradient(140deg,#0f3260,#174a82 60%,#1d5a96);
  background-size:28px 28px,28px 28px,100% 100%;
  border-radius:16px;padding:60px 40px;text-align:center;color:#e8f0f8;position:relative;overflow:hidden;margin:0 28px}
.gvt-final h2{color:#fff;justify-content:center}
.gvt-final h2::before{display:none}
.gvt-final p{color:#bcd2e6;max-width:660px;margin:0 auto 28px;font-size:15.5px}
.gvt-note{font-size:13px;color:#9db8d2;text-align:center;margin-top:28px}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .gvt-reasons,.gvt-mats,.gvt-check,.gvt-capability-grid{grid-template-columns:1fr}
  .gvt-industries{grid-template-columns:repeat(2,1fr)}
  .gvt-figure--duo{grid-template-columns:1fr}
  .gvt-capability-cell:first-child{border-right:none;border-bottom:1px solid var(--gvt-line-soft)}
  .gvt-hero-band img{height:230px}
}
@media (max-width:600px){
  .gvt-section{padding:46px 0}
  .gvt-industries{grid-template-columns:1fr}
  .gvt-final{padding:44px 22px;margin:0 14px}
  .gvt-reasons{grid-template-columns:1fr}
}