/* ============================================
   3D Printing Services — Style
   Xiamen Goldcattle Plastic & Metal Products Co., Ltd.
   Optimized for SEO + GEO (AI Search)
   ============================================ */

/* ----- BASE ----- */
*,*::before,*::after{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:15px;line-height:1.7;color:#1e293b;background:#f8fafc;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:#4a90c4;text-decoration:none}
a:hover{color:#2d6a8f}

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

/* ----- TYPOGRAPHY ----- */
h1{font-size:38px;font-weight:700;line-height:1.25;color:#fff}
h2{font-size:28px;font-weight:700;color:#0f172a;margin-bottom:12px;letter-spacing:-0.3px}
h3{font-size:18px;font-weight:600;color:#1e293b;margin-bottom:8px}
h4{font-size:15px;font-weight:600;color:#334155;margin-bottom:6px}
.section-label{display:inline-block;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:1.5px;color:#4a90c4;margin-bottom:8px}
.section-desc{font-size:15px;color:#64748b;margin-bottom:36px;max-width:780px;line-height:1.65}

/* ----- BUTTONS ----- */
.btn{display:inline-block;font-size:15px;font-weight:600;padding:14px 32px;border-radius:8px;text-decoration:none;transition:all .25s;cursor:pointer;border:none;text-align:center;white-space:nowrap}
.btn-primary{background:#4a90c4;color:#fff}
.btn-primary:hover{background:#357ab3;color:#fff}
.btn-outline{border:2px solid rgba(255,255,255,0.4);color:#fff;background:transparent}
.btn-outline:hover{border-color:#fff;color:#fff}
.btn-cta{background:#fff;color:#0f172a;font-size:16px;padding:16px 40px}
.btn-cta:hover{background:#e2e8f0;color:#0f172a}
.btn-lg{font-size:17px;padding:18px 42px}

/* ----- HERO ----- */
.hero{background:linear-gradient(135deg,#0a1628 0%,#122244 40%,#0f3460 100%);padding:80px 0 64px;color:#fff;position:relative;overflow:hidden}
.hero-grid{display:flex;gap:48px;align-items:flex-start;position:relative;z-index:1}
.hero-text{flex:1.1}
.hero-text h1{margin-bottom:8px}
.hero-text h1 em{font-style:normal;color:#5db8fe}
.hero-subtitle{font-size:17px;color:#94a3b8;margin-bottom:20px;line-height:1.7}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.hero-tags span{background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);color:#cbd5e1;padding:6px 14px;border-radius:6px;font-size:13px;font-weight:500}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-metrics{flex:0.85;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hero-metric{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);border-radius:10px;padding:18px 16px;text-align:center}
.hero-metric .val{font-size:30px;font-weight:700;color:#4a90c4;display:block;line-height:1.2}
.hero-metric .lbl{font-size:12px;color:#94a3b8;display:block;margin-top:4px;letter-spacing:0.4px}

/* ----- TRUST BAR ----- */
.trust-bar{background:#fff;border-bottom:1px solid #e2e8f0}
.trust-grid{display:flex;justify-content:space-around;text-align:center;padding:28px 0;flex-wrap:wrap}
.trust-item .trust-num{font-size:28px;font-weight:700;color:#4a90c4}
.trust-item .trust-label{font-size:12px;color:#64748b;text-transform:uppercase;letter-spacing:0.6px;margin-top:2px}

/* ----- SECTION ----- */
.section{padding:56px 0}
.section-alt{background:#fff}
.section-dark{background:#0f172a;color:#e2e8f0}
.section-dark h2{color:#fff}
.section-header{text-align:center;margin-bottom:44px}
.section-header h2{margin-bottom:8px}
.section-header .section-desc{margin-left:auto;margin-right:auto}

/* ----- AI OVERVIEW ----- */
.ai-overview{background:#fff;padding:48px 0;border-bottom:1px solid #e2e8f0}
.ai-overview h2{font-size:20px;margin-bottom:16px}
.ai-overview .answer{font-size:15px;color:#475569;line-height:1.75;margin-bottom:18px}
.ai-tags{display:flex;flex-wrap:wrap;gap:10px}
.ai-tag{background:#f0f7ff;border-left:3px solid #4a90c4;padding:8px 16px;border-radius:0 6px 6px 0;font-size:14px;color:#1e3a5f}

/* ----- CAPABILITY TABLE ----- */
.cap-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:12px;box-shadow:0 4px 20px -4px rgba(0,0,0,0.08)}
.cap-table{width:100%;border-collapse:collapse;font-size:14px;min-width:600px}
.cap-table th{background:#0f172a;color:#fff;padding:12px 18px;font-weight:600;text-align:left;white-space:nowrap}
.cap-table td{padding:12px 18px;border-bottom:1px solid #e2e8f0;color:#334155}
.cap-table tr:last-child td{border-bottom:none}
.cap-table tr:nth-child(even) td{background:#f8fafc}

/* ----- CHALLENGE CARDS ----- */
.challenge-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.challenge-card{background:#f8fafc;border-radius:10px;padding:24px;border-top:3px solid #0f172a}
.challenge-card h3{margin-bottom:4px}
.challenge-card .badge{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:0.5px}
.challenge-card .badge-p{color:#c62828}
.challenge-card .badge-s{color:#2e7d32}
.challenge-card .badge-r{color:#4a90c4}
.challenge-card p{font-size:14px;color:#475569;line-height:1.65;margin:6px 0}

/* ----- CAPABILITY CARDS ----- */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cap-card{background:#f8fafc;border-radius:10px;padding:22px 18px;border-top:3px solid #0f172a}
.cap-card h3{font-size:16px}
.cap-card .label{font-size:12px;color:#64748b;font-weight:600;text-transform:uppercase;letter-spacing:0.5px}
.cap-card ul{list-style:none;margin-top:8px}
.cap-card li{font-size:14px;color:#475569;padding:2px 0;padding-left:14px;position:relative;line-height:1.6}

/* ----- STEEL GRID (reused for materials) ----- */
.steel-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.steel-card{background:#f8fafc;border-radius:10px;padding:18px 14px;border-top:3px solid #0f172a;text-align:center}
.steel-card h4{font-size:15px;color:#0f172a;margin-bottom:4px}
.steel-card .spec{font-size:12px;color:#64748b}
.steel-card .life{font-size:12px;color:#4a90c4;font-weight:600;margin-top:4px}

/* ----- PROCESS STEPS ----- */
.process-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.process-step{background:#f1f5f9;border-radius:10px;padding:20px 14px;border-top:3px solid #0f172a;text-align:center}
.process-step .num{background:#0f172a;color:#fff;width:30px;height:30px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;margin-bottom:8px}
.process-step h4{font-size:14px;color:#0f172a;margin-bottom:4px}
.process-step p{font-size:13px;color:#64748b;line-height:1.5}

/* ----- WHY CARDS ----- */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.why-card{background:#fff;border-radius:10px;padding:24px 20px;border:1px solid #e2e8f0;transition:box-shadow .25s}
.why-card:hover{box-shadow:0 8px 30px -8px rgba(0,0,0,0.1)}
.why-card .icon{font-size:28px;margin-bottom:10px}
.why-card h4{margin-bottom:6px}
.why-card p{font-size:14px;color:#64748b;line-height:1.6}

/* ----- CASE GRID ----- */
.case-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}
.case-card{background:#fff;border-radius:12px;overflow:hidden;border:1px solid #e2e8f0;box-shadow:0 2px 12px rgba(0,0,0,0.04);position:relative}
.case-card .case-img{width:100%;height:200px;overflow:hidden}
.case-body{padding:20px}
.case-body .case-tag{display:inline-block;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.5px;color:#4a90c4;background:#eff6ff;padding:3px 10px;border-radius:4px;margin-bottom:8px}
.case-body h4{font-size:17px;margin-bottom:8px}
.case-body p{font-size:13px;color:#64748b;line-height:1.6}

/* ----- INDUSTRY GRID ----- */
.industry-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.industry-card{border-radius:10px;padding:18px 14px;color:#fff;text-align:center}
.industry-card h4{color:#fff;font-size:15px;margin-bottom:6px}
.industry-card p{font-size:12px;line-height:1.5;opacity:0.85}
.industry-card .cert{font-size:11px;font-weight:600;margin-top:6px;opacity:0.9}
.ind-aero{background:#0f172a}
.ind-med{background:#2e7d32}
.ind-auto{background:#c2410c}
.ind-elect{background:#6d28d9}
.ind-ind{background:#0e7490}

/* ----- COMPARISON TABLE ----- */
.compare-table{width:100%;border-collapse:collapse;font-size:14px;border-radius:10px;overflow:hidden}
.compare-table th{background:#0f172a;color:#fff;padding:12px 16px;font-weight:600}
.compare-table td{padding:10px 16px;border-bottom:1px solid #e2e8f0}
.compare-table td.yes{color:#16a34a;font-weight:600}

/* ----- FAQ ----- */
.faq-item{border-bottom:1px solid #e2e8f0}
.faq-q{font-size:16px;font-weight:600;color:#1e293b;padding:16px 0;cursor:pointer;display:flex;justify-content:space-between;align-items:center;user-select:none;transition:color .2s}
.faq-q:hover{color:#4a90c4}
.faq-q .arrow{font-size:14px;transition:transform .25s;color:#94a3b8}
.faq-q.open .arrow{transform:rotate(45deg);color:#4a90c4}
.faq-a{font-size:14px;color:#475569;line-height:1.7;padding:0 0 16px;display:none}
.faq-a.open{display:block}

/* ----- HIGHLIGHT BOX ----- */
.highlight{background:#f0f7ff;border-left:4px solid #4a90c4;padding:16px 20px;border-radius:0 8px 8px 0;margin:20px 0}
.highlight p{font-size:14px;color:#1e3a5f;margin:0;line-height:1.65}
.highlight.warning{background:#fef3c7;border-left-color:#d97706}

/* ----- EEAT ----- */
.eeat-box{background:#f1f5f9;border-radius:10px;padding:20px 24px;display:flex;align-items:center;gap:16px;margin-top:20px}
.eeat-avatar{background:#0f172a;color:#fff;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;flex-shrink:0}
.eeat-info p{margin:2px 0;font-size:13px;color:#475569}
.eeat-info p:first-child{font-size:14px;font-weight:600;color:#0f172a}

/* ----- CTA ----- */
.cta-section{background:linear-gradient(135deg,#0f172a 0%,#122244 50%,#0f3460 100%);padding:64px 0;text-align:center;color:#fff}
.cta-section h2{color:#fff;font-size:30px;margin-bottom:12px}
.cta-section p{color:#94a3b8;font-size:16px;margin-bottom:28px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-note{font-size:13px;color:#64748b;margin-top:18px}

/* ----- GEO SUMMARY ----- */
.geo-section{background:#0f172a;color:#fff;padding:48px 0}
.geo-section h2{color:#fff;font-size:18px;border-bottom:2px solid #4a90c4;padding-bottom:8px;margin-bottom:20px}
.geo-table{width:100%;border-collapse:collapse;font-size:14px}
.geo-table td{padding:10px 18px;border-bottom:1px solid rgba(255,255,255,0.1)}
.geo-table td:first-child{font-weight:600;width:30%}

/* ----- FOOTER ----- */
.footer{background:#0a1628;color:#94a3b8;padding:28px 0;text-align:center;font-size:13px}
.footer a{color:#4a90c4}

/* ----- RESPONSIVE ----- */
@media(max-width:768px){
  .hero{padding:40px 0 36px}
  .hero-grid{flex-direction:column;gap:28px}
  .hero-text h1{font-size:26px}
  .hero-tags{gap:8px}
  .hero-tags span{font-size:12px;padding:4px 10px}
  .hero-actions{flex-direction:column}
  .btn{width:100%;text-align:center}
  .hero-metrics{grid-template-columns:1fr 1fr 1fr}
  .hero-metric{padding:12px 8px}
  .hero-metric .val{font-size:22px}
  .hero-metric .lbl{font-size:11px}
  .trust-grid{gap:16px;padding:20px 0}
  .trust-item{flex:1 1 40%}
  .trust-item .trust-num{font-size:22px}
  h2{font-size:22px}
  h3{font-size:16px}
  .challenge-grid{grid-template-columns:1fr}
  .cap-grid{grid-template-columns:1fr 1fr}
  .steel-grid{grid-template-columns:1fr 1fr 1fr}
  .process-steps{grid-template-columns:1fr 1fr}
  .why-grid{grid-template-columns:1fr 1fr}
  .case-grid{grid-template-columns:1fr}
  .industry-grid{grid-template-columns:1fr 1fr}
  .section{padding:36px 0}
  .section-header{margin-bottom:28px}
  .cta-section{padding:40px 0}
  .cta-section h2{font-size:24px}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero{padding:32px 0 28px}
  .hero-text h1{font-size:22px}
  .hero-subtitle{font-size:15px}
  .hero-metrics{grid-template-columns:1fr 1fr}
  .cap-grid{grid-template-columns:1fr}
  .steel-grid{grid-template-columns:1fr 1fr}
  .process-steps{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .industry-grid{grid-template-columns:1fr}
  .trust-item{flex:1 1 100%}
  .cta-section h2{font-size:20px}
  .cta-section p{font-size:14px}
}