/* ============================================
   Custom CNC Machined Aerospace Parts — Style
   Xiamen Goldcattle Plastic & Metal Products Co., Ltd.
   Theme: Sky-Blue Aerospace (coordinated with site #4a90c4)
   ============================================ */

:root{
  --bg:#f4f7fb;
  --bg-alt:#eaf0f7;
  --bg-card:#ffffff;
  --bg-card-hover:#f0f5fa;
  --bg-deep:#edf2f8;
  --text-primary:#1e2a3a;
  --text-secondary:#3d4f63;
  --text-muted:#6b7d93;
  --text-light:#a0b4c8;
  --blue:#4a90c4;
  --blue-hover:#3579b0;
  --blue-deep:#2d6a8f;
  --blue-light:rgba(74,144,196,.08);
  --blue-glow:rgba(74,144,196,.12);
  --steel:#5a7fa0;
  --border:#d0dae6;
  --border-hover:#b0c4de;
  --border-subtle:#e4ecf4;
  --radius:8px;
  --radius-lg:14px;
  --shadow:0 2px 14px rgba(30,42,58,.06);
  --shadow-lg:0 8px 32px rgba(30,42,58,.1);
  --transition:all .25s ease;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',-apple-system,BlinkMacSystemFont,'Helvetica Neue',Arial,sans-serif;font-size:17px;line-height:1.72;color:var(--text-primary);background:var(--bg);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue-deep)}

.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ── Nav ── */
.nav{position:sticky;top:0;z-index:100;background:rgba(244,247,251,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);padding:10px 0}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{height:42px;width:auto;border-radius:4px}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{font-size:14px;font-weight:500;color:var(--text-secondary);padding:6px 0;border-bottom:2px solid transparent;transition:var(--transition)}
.nav-links a:hover{color:var(--blue);border-bottom-color:var(--blue)}

/* ── Hero ── */
.hero{background:linear-gradient(160deg,#1a3550 0%,#2a5a80 35%,#1e4468 70%,#162d48 100%);padding:80px 0 64px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-100px;right:-80px;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(74,144,196,.15) 0%,transparent 65%);pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-60px;left:20%;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(74,144,196,.1) 0%,transparent 65%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:52px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(74,144,196,.15);border:1px solid rgba(74,144,196,.3);color:#a0d0f0;padding:7px 16px;border-radius:20px;font-size:13px;font-weight:600;margin-bottom:16px;letter-spacing:.3px}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:#4ade80;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

h2{font-size:36px;font-weight:800;color:#fff;line-height:1.22;margin-bottom:14px;letter-spacing:-.4px}
.hero-sub{font-size:18px;color:#c8dce8;line-height:1.65;margin-bottom:28px;max-width:560px}
.hero-attrs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.hero-attr{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);padding:9px 16px;border-radius:6px;font-size:14px;color:#c8dce8;font-weight:500}
.hero-attr em{font-style:normal;color:#f0d080;font-weight:700}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-image img{border-radius:var(--radius-lg);box-shadow:0 12px 48px rgba(0,0,0,.3)}

/* ── Buttons ── */
.btn{display:inline-block;padding:14px 30px;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;transition:var(--transition);border:none;text-align:center;text-decoration:none}
.btn-blue{background:linear-gradient(135deg,#4a90c4,#2d6a8f);color:#fff;box-shadow:0 3px 16px rgba(74,144,196,.3)}
.btn-blue:hover{transform:translateY(-1px);box-shadow:0 5px 24px rgba(74,144,196,.4);color:#fff}
.btn-blue:active{transform:translateY(0)}
.btn-outline{background:transparent;color:#c8dce8;border:1.5px solid rgba(255,255,255,.25)}
.btn-outline:hover{border-color:#a0d0f0;color:#a0d0f0}

/* ── Section base ── */
.section{padding:64px 0}
.section-alt{background:var(--bg-alt)}
.section-deep{background:var(--bg-deep)}
.section-label{display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1.6px;color:var(--blue);margin-bottom:10px}

.hero-badge h2{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:12px;letter-spacing:-.3px;line-height:1.3}
h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:8px}
.section-desc{font-size:17px;color:var(--text-secondary);margin-bottom:36px;max-width:780px;line-height:1.65}

/* ── Capability Snapshot ── */
.snapshot{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 40px;box-shadow:var(--shadow)}
.snapshot h2{margin-bottom:24px}
.snapshot-table{width:100%;border-collapse:collapse}
.snapshot-table th{text-align:left;font-size:13px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.8px;padding:12px 16px;border-bottom:2px solid var(--border);width:180px}
.snapshot-table td{font-size:17px;color:var(--text-primary);padding:12px 16px;border-bottom:1px solid var(--border-subtle)}
.snapshot-table tr:last-child td,.snapshot-table tr:last-child th{border-bottom:none}
.snapshot-note{margin-top:16px;font-size:14px;color:var(--text-muted);font-style:italic}

/* ── Component cards ── */
.comp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.comp-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px 22px;transition:var(--transition);position:relative;overflow:hidden;box-shadow:var(--shadow)}
.comp-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--steel))}
.comp-card:hover{border-color:var(--blue);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.comp-card .icon{font-size:26px;margin-bottom:12px;display:block}
.comp-card h3{font-size:17px;margin-bottom:10px}
.comp-card ul{list-style:none}
.comp-card li{font-size:14px;color:var(--text-secondary);padding:3px 0;line-height:1.5}
.comp-card li::before{content:'▸ ';color:var(--blue);font-weight:700}

/* ── Part Type → Feature table ── */
.feature-table{width:100%;border-collapse:collapse;background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow)}
.feature-table th{background:var(--blue-light);color:var(--blue-deep);font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;padding:14px 18px;text-align:left}
.feature-table td{font-size:15px;padding:12px 18px;border-bottom:1px solid var(--border-subtle);color:var(--text-secondary)}
.feature-table td:first-child{color:var(--text-primary);font-weight:600}
.feature-table tr:last-child td{border-bottom:none}

/* ── Material cards ── */
.mat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.mat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px 22px;border-top:3px solid var(--blue);transition:var(--transition);box-shadow:var(--shadow)}
.mat-card:hover{border-color:var(--blue);box-shadow:var(--shadow-lg)}
.mat-card h3{font-size:18px;margin-bottom:4px}
.mat-card .grades{font-size:13px;color:var(--blue);font-weight:600;margin-bottom:14px;letter-spacing:.3px}
.mat-card ul{list-style:none}
.mat-card li{padding:6px 0;font-size:14px;color:var(--text-secondary);border-bottom:1px solid var(--border-subtle)}
.mat-card li:last-child{border-bottom:none}
.mat-card li::before{content:'· ';color:var(--blue);font-weight:700}
.mat-special{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px;margin-top:18px;box-shadow:var(--shadow)}
.mat-special p{font-size:15px;color:var(--text-secondary);line-height:1.6}

/* ── 5-Axis benefits ── */
.axis-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.axis-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px 20px;display:flex;gap:14px;align-items:flex-start;transition:var(--transition);box-shadow:var(--shadow)}
.axis-card:hover{border-color:var(--blue)}
.axis-card .num{font-size:28px;font-weight:800;color:var(--blue);line-height:1;flex-shrink:0;min-width:30px;opacity:.5}
.axis-card h3{font-size:16px;margin-bottom:4px}
.axis-card p{font-size:14px;color:var(--text-secondary);line-height:1.55}

/* ── GD&T ── */
.gdt-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}
.gdt-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 14px;text-align:center;transition:var(--transition);box-shadow:var(--shadow)}
.gdt-item:hover{border-color:var(--blue);box-shadow:0 2px 12px rgba(74,144,196,.12)}
.gdt-item .symbol{font-size:22px;color:var(--blue);margin-bottom:8px;display:block;font-weight:300;font-family:'Times New Roman',serif}
.gdt-item p{font-size:14px;color:var(--text-secondary);font-weight:500}

/* ── DFM ── */
.dfm-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.dfm-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 18px;border-left:3px solid var(--blue);box-shadow:var(--shadow)}
.dfm-item h3{font-size:15px;margin-bottom:6px}
.dfm-item p{font-size:14px;color:var(--text-secondary);line-height:1.55}

/* ── Tolerance ── */
.tol-block{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 28px;box-shadow:var(--shadow)}
.tol-row{display:grid;grid-template-columns:200px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--border-subtle);font-size:15px}
.tol-row:last-child{border-bottom:none}
.tol-row .label{color:var(--text-muted);font-weight:600}
.tol-row .value{color:var(--text-primary)}
.tol-note{margin-top:20px;font-size:15px;color:var(--text-secondary);line-height:1.65;padding:18px 22px;background:var(--blue-light);border-radius:var(--radius);border-left:4px solid var(--blue)}

/* ── Process flow ── */
.process-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.process-step{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 18px;text-align:center;position:relative;transition:var(--transition);box-shadow:var(--shadow)}
.process-step:hover{border-color:var(--blue);box-shadow:var(--shadow-lg)}
.process-step .num{font-size:12px;font-weight:700;color:var(--blue);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}
.process-step h3{font-size:15px;margin-bottom:6px}
.process-step p{font-size:13px;color:var(--text-secondary);line-height:1.5}
.process-step::after{content:'→';position:absolute;right:-12px;top:50%;transform:translateY(-50%);color:var(--blue);font-size:18px;font-weight:700}
.process-step:nth-child(3n)::after,.process-step:last-child::after{content:none}

/* ── Quality ── */
.quality-flow{display:flex;flex-wrap:wrap;gap:0;align-items:center;justify-content:center;margin-bottom:28px}
.quality-step{background:var(--bg-card);border:1px solid var(--border);padding:12px 20px;font-size:14px;color:var(--text-secondary);font-weight:500;transition:var(--transition)}
.quality-step:hover{border-color:var(--blue);color:var(--text-primary)}
.quality-arrow{color:var(--blue);font-size:18px;padding:0 4px;font-weight:300}
.quality-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}
.quality-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 14px;text-align:center;transition:var(--transition);box-shadow:var(--shadow)}
.quality-item:hover{border-color:var(--blue)}
.quality-item .q-icon{font-size:24px;margin-bottom:8px;display:block;color:var(--blue)}
.quality-item p{font-size:14px;color:var(--text-secondary);font-weight:500}

/* ── Surface treatments ── */
.treat-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px}
.treat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px 22px;box-shadow:var(--shadow)}
.treat-card h3{font-size:17px;margin-bottom:14px}
.treat-card ul{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.treat-card li{background:var(--bg-alt);padding:5px 12px;border-radius:16px;font-size:13px;color:var(--text-secondary);border:1px solid var(--border-subtle)}

/* ── Prototype → Production ── */
.proto-flow{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:0;align-items:stretch}
.proto-step{background:var(--bg-card);border:1px solid var(--border);padding:20px 14px;text-align:center;position:relative;transition:var(--transition)}
.proto-step:hover{background:var(--bg-card-hover)}
.proto-step .num{font-size:11px;font-weight:700;color:var(--blue);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}
.proto-step p{font-size:14px;color:var(--text-secondary);font-weight:500}
.proto-step::after{content:'→';position:absolute;right:-9px;top:50%;transform:translateY(-50%);color:var(--blue);font-size:16px;z-index:2}
.proto-step:last-child::after{content:none}

/* ── Case study ── */
.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.case-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow)}
.case-card:hover{border-color:var(--blue);box-shadow:var(--shadow-lg)}
.case-header{padding:22px 24px;border-bottom:1px solid var(--border-subtle)}
.case-header .tag{display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--blue);margin-bottom:6px}
.case-header h3{font-size:17px}
.case-body{padding:20px 24px}
.case-row{display:grid;grid-template-columns:120px 1fr;gap:10px;padding:8px 0;border-bottom:1px solid var(--border-subtle);font-size:14px}
.case-row:last-child{border-bottom:none}
.case-row .label{color:var(--text-muted);font-weight:600}
.case-row .value{color:var(--text-secondary)}

/* ── RFQ Requirements ── */
.rfq-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.rfq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 16px;display:flex;gap:10px;align-items:center;transition:var(--transition);box-shadow:var(--shadow)}
.rfq-item:hover{border-color:var(--blue)}
.rfq-item .check{color:var(--blue);font-size:16px;font-weight:700;flex-shrink:0}
.rfq-item p{font-size:14px;color:var(--text-secondary);font-weight:500}
.rfq-note{margin-top:20px;font-size:15px;color:var(--text-secondary);line-height:1.6;font-style:italic}

/* ── Applications ── */
.app-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.app-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 16px;text-align:center;transition:var(--transition);box-shadow:var(--shadow)}
.app-item:hover{border-color:var(--blue);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.app-item .a-icon{font-size:28px;margin-bottom:8px;display:block}
.app-item p{font-size:14px;color:var(--text-secondary);font-weight:500}

/* ── FAQ ── */
.faq-list{max-width:820px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;background:var(--bg-card);overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--blue)}
.faq-q{padding:18px 22px;font-size:16px;font-weight:600;color:var(--text-primary);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q::after{content:'+';font-size:20px;color:var(--blue);flex-shrink:0;font-weight:300;transition:var(--transition)}
.faq-item.open .faq-q::after{content:'−'}
.faq-a{padding:0 22px 18px;font-size:15px;color:var(--text-secondary);line-height:1.65;display:none}
.faq-item.open .faq-a{display:block}

/* ── CTA ── */
.cta-section{background:linear-gradient(160deg,#1a3550 0%,#2a5a80 50%,#1e4468 100%);padding:72px 0;text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;top:-80px;left:50%;transform:translateX(-50%);width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(74,144,196,.12) 0%,transparent 65%);pointer-events:none}
.cta-section h2{color:#fff;font-size:30px;margin-bottom:14px}
.cta-section .section-desc{color:#c8dce8;margin:0 auto 32px;max-width:640px}

/* ── Footer ── */
.footer{background:var(--bg-deep);padding:28px 0;text-align:center;border-top:1px solid var(--border)}
.footer p{font-size:13px;color:var(--text-muted)}
.footer a{color:var(--text-secondary)}

/* ── Image block ── */
.img-block{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.img-block img{width:100%;display:block}

/* ── Internal links ── */
.internal-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.internal-links a{background:var(--bg-card);border:1px solid var(--border);padding:7px 16px;border-radius:6px;font-size:14px;color:var(--text-secondary);transition:var(--transition)}
.internal-links a:hover{border-color:var(--blue);color:var(--blue)}

/* ── Utility ── */
.mt24{margin-top:24px}
.mt32{margin-top:32px}

/* ── Responsive ── */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-image{order:-1}
  h2{font-size:28px}
  h2{font-size:24px}
  .axis-grid,.treat-grid,.case-grid{grid-template-columns:1fr}
  .process-flow{grid-template-columns:repeat(2,1fr)}
  .process-step:nth-child(2n)::after{content:none}
  .process-step::after{right:-10px}
  .dfm-grid{grid-template-columns:1fr 1fr}
  .proto-flow{grid-template-columns:repeat(3,1fr)}
  .quality-flow{flex-direction:column}
  .quality-arrow{transform:rotate(90deg)}
}
@media(max-width:600px){
  .hero{padding:48px 0 36px}
  .section{padding:40px 0}
  .container{padding:0 16px}
  .comp-grid,.mat-grid{grid-template-columns:1fr}
  .process-flow{grid-template-columns:1fr}
  .process-step::after{content:none}
  .dfm-grid{grid-template-columns:1fr}
  .gdt-grid{grid-template-columns:repeat(3,1fr)}
  .quality-grid{grid-template-columns:repeat(2,1fr)}
  .app-grid{grid-template-columns:repeat(2,1fr)}
  .rfq-grid{grid-template-columns:1fr}
  .snapshot{padding:24px 18px}
  .snapshot-table th{width:110px;font-size:12px}
  .snapshot-table td{font-size:15px}
  .proto-flow{grid-template-columns:repeat(2,1fr)}
  .proto-step::after{content:none}
  .tol-row{grid-template-columns:1fr;gap:4px}
  .case-row{grid-template-columns:1fr;gap:2px}
}