/* ============================================================
   QilinLab Design System
   ============================================================ */

/* 1. Reset
   ============================================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
}

/* 2. Design Tokens
   ============================================================ */
:root {
  /* Colors */
  --bg: #fafaf8;
  --bg-card: #fff;
  --bg-footer: #1a1a2e;
  --text-primary: #1a1a1a;
  --text-secondary: #555;
  --text-muted: #888;
  --text-faint: #aaa;
  --text-on-dark: #fff;
  --accent-blue: #0ea5e9;
  --accent-green: #6366f1;
  --accent-orange: #c85000;
  --border: #eae8e4;
  --border-light: rgba(0, 0, 0, 0.04);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Noto Serif SC', 'Georgia', serif;

  /* Spacing */
  --container: 960px;
  --gutter: 48px;

  /* Transitions */
  --ease: 0.3s ease;
}

/* 3. Base Styles
   ============================================================ */
html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 4. Typography
   ============================================================ */
h1 {
  font-family: var(--font-serif);
  font-size: 42px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h2 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
}

h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
}

.tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-blue);
}

.lead {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.gradient-text {
  background: linear-gradient(90deg, #0ea5e9, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 5. Layout
   ============================================================ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: 80px 0;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

/* 6. Nav
   ============================================================ */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 29px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav-logo span {
  color: var(--accent-blue);
}
.nav-logo em {
  font-style: normal;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 12px;
  letter-spacing: 1.5px;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-lang {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-muted);
  transition: color var(--ease), border-color var(--ease);
  cursor: pointer;
}

.nav-lang:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.nav-links a.nav-cta {
  padding: 6px 16px;
  background: var(--accent-blue);
  color: var(--text-on-dark);
  font-size: 12px;
  font-weight: 500;
  border-radius: 3px;
  transition: opacity var(--ease);
}
.nav-links a.nav-cta:hover {
  color: var(--text-on-dark);
  opacity: 0.85;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--ease), opacity var(--ease);
}

/* 7. Buttons
   ============================================================ */
.btn-primary {
  display: inline-block;
  background: var(--text-primary);
  color: var(--text-on-dark);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 24px;
  border-radius: 3px;
  border: 1px solid var(--text-primary);
  transition: opacity var(--ease);
  cursor: pointer;
}

.btn-primary:hover {
  opacity: 0.8;
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 24px;
  border-radius: 3px;
  border: 1px solid var(--border);
  transition: border-color var(--ease), color var(--ease);
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

/* 8. Cards
   ============================================================ */
.card {
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: border-color var(--ease);
}

.card:hover {
  border-color: var(--text-muted);
}

.card-num {
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.card-link {
  font-size: 12px;
  color: var(--accent-blue);
  font-weight: 500;
  transition: opacity var(--ease);
}

.card-link::after {
  content: ' →';
}

.card-link:hover {
  opacity: 0.7;
}
.card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 2px;
  margin-bottom: 16px;
}

/* 9. Page Header
   ============================================================ */
.page-header {
  padding-top: 80px;
  padding-bottom: 48px;
}

.page-header .tag {
  margin-bottom: 16px;
  display: block;
}

.page-header h1 {
  margin-bottom: 20px;
}

/* 10. Footer
   ============================================================ */
.footer {
  background: var(--bg-footer);
  color: var(--text-on-dark);
  padding: 40px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left {
  font-size: 13px;
  opacity: 0.6;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  opacity: 0.6;
  transition: opacity var(--ease);
}

.footer-links a:hover {
  opacity: 1;
}

/* 11. Hero (Homepage)
   ============================================================ */
.hero {
  padding: 100px var(--gutter) 80px;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero h1 { margin-bottom: 24px; }
.hero .lead { max-width: 440px; }
.hero-cta { display: flex; gap: 16px; margin-top: 36px; }

.hero-visual {
  position: relative;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 12. Stats Bar
   ============================================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat {
  padding: 32px var(--gutter);
  border-right: 1px solid var(--border);
}

.stat:last-child {
  border-right: none;
}

.stat-value {
  font-size: 36px;
  font-family: var(--font-serif);
  font-weight: 300;
  line-height: 1;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.stat-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* 13. Modules (Homepage)
   ============================================================ */
.modules {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px var(--gutter) 80px;
}
.modules-title { text-align: center; margin-bottom: 40px; }
.modules-title h2 { margin-bottom: 8px; }
.modules-title p { font-size: 13px; color: var(--text-muted); }
.modules-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.mod {
  padding: 32px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: border-color var(--ease);
}
.mod:hover { border-color: #ccc; }
.mod-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.mod-icon {
  width: 36px; height: 36px; border-radius: 4px;
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.mod-icon.blue { background: rgba(37, 99, 235, 0.08); }
.mod-icon.amber { background: rgba(245, 158, 11, 0.1); }
.mod-icon.green { background: rgba(16, 185, 129, 0.08); }
.mod-icon.purple { background: rgba(139, 92, 246, 0.08); }
.mod h3 { font-family: var(--font-sans); font-size: 17px; }
.mod p { font-size: 13px; color: #777; line-height: 1.8; }
.mod-link {
  display: inline-block; margin-top: 16px;
  font-size: 12px; color: var(--accent-blue); font-weight: 500;
}
.mod-link::after { content: ' \2192'; }

/* 13b. CTA Banner
   ============================================================ */
.cta-banner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 var(--gutter) 80px;
}
.cta-inner {
  padding: 48px; background: var(--text-primary);
  border-radius: 3px; display: flex;
  justify-content: space-between; align-items: center;
}
.cta-inner h2 { color: var(--text-on-dark); }
.cta-inner p { font-size: 13px; color: var(--text-muted); margin-top: 8px; }
.cta-inner .btn-cta {
  padding: 12px 28px; background: var(--accent-blue);
  color: var(--text-on-dark); font-size: 13px; font-weight: 500;
  border-radius: 3px; white-space: nowrap;
}

/* 14. Module Detail (Product)
   ============================================================ */
.module-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  padding: 36px 0; border-bottom: 1px solid var(--border);
}
.module-detail:last-child { border-bottom: none; }

.mod-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: 500; padding: 4px 12px;
  border-radius: 3px; margin-bottom: 16px;
}
.mod-badge .dot { width: 6px; height: 6px; border-radius: 50%; }
.mod-badge.blue { background: rgba(37, 99, 235, 0.08); color: #0ea5e9; }
.mod-badge.blue .dot { background: #0ea5e9; }
.mod-badge.amber { background: rgba(245, 158, 11, 0.1); color: #6366f1; }
.mod-badge.amber .dot { background: #f59e0b; }
.mod-badge.green { background: rgba(16, 185, 129, 0.08); color: #059669; }
.mod-badge.green .dot { background: #10b981; }
.mod-badge.purple { background: rgba(139, 92, 246, 0.08); color: #7c3aed; }
.mod-badge.purple .dot { background: #8b5cf6; }

.module-detail h3 { margin-bottom: 12px; }
.module-detail p { font-size: 13px; color: var(--text-secondary); line-height: 1.8; }
.module-detail p + p { margin-top: 10px; }

.feature-list { margin-top: 16px; }
.feature-item {
  display: flex; gap: 10px; align-items: baseline;
  padding: 8px 0; font-size: 13px; color: var(--text-secondary);
}
.feature-item::before {
  content: ''; display: block; width: 5px; height: 5px;
  background: var(--accent-blue); border-radius: 50%; flex-shrink: 0; margin-top: 6px;
}

.metric-row { display: flex; gap: 32px; margin-top: 20px; }
.metric-val { font-size: 28px; font-weight: 700; color: var(--text-primary); }
.metric-val .accent { color: var(--accent-blue); }
.metric-desc { font-size: 11px; color: var(--text-muted); margin-top: 4px; }

/* 15. Solution Cards (Solutions)
   ============================================================ */
.solution-card {
  padding: 36px 32px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 2px; margin-bottom: 24px;
}
.tier-badge {
  font-size: 10px; letter-spacing: 2px; text-transform: uppercase;
  font-weight: 600; margin-bottom: 16px;
}
.tier-badge.chain { color: var(--accent-blue); }
.tier-badge.sme { color: #6366f1; }
.solution-card h3 { margin-bottom: 12px; }
.solution-card .desc { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }

.pain-solution { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.pain-col h4, .solve-col h4 {
  font-family: var(--font-sans); font-size: 12px; font-weight: 600;
  letter-spacing: 1px; text-transform: uppercase; margin-bottom: 12px;
}
.pain-col h4 { color: var(--text-faint); }
.solve-col h4 { color: var(--accent-blue); }
.pain-col li, .solve-col li {
  font-size: 13px; color: var(--text-secondary); line-height: 1.8;
  padding: 6px 0; border-bottom: 1px solid #f0eeea;
}
.pain-col li::before { content: '\25B3  '; color: #ccc; }
.solve-col li::before { content: '\2192  '; color: var(--accent-blue); }

.included { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.included-tag {
  font-size: 11px; padding: 4px 12px;
  border: 1px solid var(--border); border-radius: 2px; color: var(--text-secondary);
}

/* 16. Case Cards (Cases)
   ============================================================ */
.case-card {
  padding: 32px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 2px; margin-bottom: 24px;
}
.case-header {
  display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px;
}
.case-name { font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.case-type { font-size: 12px; color: var(--text-muted); }
.case-tag {
  font-size: 10px; letter-spacing: 1px; text-transform: uppercase;
  font-weight: 600; padding: 4px 10px; border-radius: 2px;
}
.case-tag.chain { background: rgba(37, 99, 235, 0.08); color: var(--accent-blue); }
.case-tag.sme { background: rgba(245, 158, 11, 0.1); color: #6366f1; }

.case-quote {
  font-family: var(--font-serif); font-size: 15px; color: #333;
  line-height: 1.8; font-style: italic;
  padding: 16px 0 16px 20px; border-left: 2px solid var(--accent-blue); margin-bottom: 20px;
}
.case-body { font-size: 13px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.case-metrics { display: flex; gap: 32px; padding-top: 16px; border-top: 1px solid var(--border); }
.case-metric-val { font-size: 24px; font-weight: 700; color: var(--text-primary); }
.case-metric-val .accent { color: var(--accent-blue); }
.case-metric-desc { font-size: 11px; color: var(--text-muted); margin-top: 4px; }

/* 17. Pricing
   ============================================================ */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px;
}
.price-card {
  padding: 32px 28px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 2px;
  display: flex; flex-direction: column;
}
.price-card.featured { border-color: var(--accent-blue); position: relative; }
.price-card.featured::before {
  content: '热门'; position: absolute; top: -10px; left: 24px;
  font-size: 10px; font-weight: 600; color: var(--text-on-dark);
  background: var(--accent-blue); padding: 2px 10px; border-radius: 2px; letter-spacing: 1px;
}
.price-tier {
  font-family: var(--font-sans); font-size: 12px; font-weight: 600;
  letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; color: var(--text-muted);
}
.price-card.featured .price-tier { color: var(--accent-blue); }
.price-amount { margin-bottom: 16px; }
.price-num { font-size: 36px; font-weight: 700; color: var(--text-primary); letter-spacing: -1px; }
.price-unit { font-size: 13px; color: var(--text-muted); }
.price-desc {
  font-size: 13px; color: var(--text-secondary); line-height: 1.6;
  margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--border);
}
.price-features { flex: 1; margin-bottom: 24px; }
.price-feature {
  font-size: 13px; color: var(--text-secondary); padding: 6px 0;
  display: flex; gap: 8px; align-items: baseline;
}
.price-feature::before { content: '\2713'; color: var(--accent-blue); font-size: 12px; flex-shrink: 0; }
.price-btn {
  display: block; text-align: center; padding: 12px;
  font-size: 13px; font-weight: 500; border-radius: 3px;
}
.price-btn.outline { border: 1px solid var(--border); color: var(--text-primary); }
.price-btn.outline:hover { border-color: var(--text-muted); }
.price-btn.filled { background: var(--accent-blue); color: var(--text-on-dark); }
.price-btn.filled:hover { opacity: 0.85; }
.price-btn.dark { background: var(--text-primary); color: var(--text-on-dark); }
.price-btn.dark:hover { opacity: 0.85; }
.pricing-note { text-align: center; margin-top: 24px; font-size: 12px; color: var(--text-faint); }

/* 18. Contact
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-block {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 2px;
}

.contact-item {
  margin-bottom: 20px;
}

.contact-item:last-child {
  margin-bottom: 0;
}

.contact-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 14px;
  color: var(--text-primary);
}

.cta-block {
  text-align: center;
  padding: 64px 48px;
  border: 1px solid var(--border);
  border-radius: 2px;
}

/* Process Steps (Services)
   ============================================================ */
.process-steps { margin-top: 32px; }
.process-step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.process-step:last-child { border-bottom: none; }
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(14, 165, 233, 0.08);
  color: var(--accent-blue);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.process-step h3 { margin-bottom: 6px; }
.process-step p { font-size: 13px; color: var(--text-secondary); line-height: 1.8; }

/* Tech Overview (Services)
   ============================================================ */
.tech-overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}
.tech-card {
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
}
.tech-card h4 {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.tech-card p { font-size: 12px; color: #777; line-height: 1.6; }
.tech-card .specs {
  font-size: 11px;
  color: var(--accent-blue);
  margin-top: 8px;
  font-weight: 500;
}

/* Industry Cards (Industries)
   ============================================================ */
.industry-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  margin-bottom: 24px;
}
.industry-card .ind-badge {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 16px;
}
.industry-card h3 { margin-bottom: 12px; }
.industry-card .desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.use-cases { margin-top: 12px; }
.use-case {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 6px 0;
  font-size: 13px;
  color: var(--text-secondary);
}
.use-case::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--accent-blue);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 6px;
}
.rec-tech { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.rec-tag {
  font-size: 11px;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-secondary);
}

/* Material Sections (Materials)
   ============================================================ */
.material-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}
.material-section:last-child { border-bottom: none; }
.material-section h3 { margin-bottom: 8px; }
.material-section .desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.mat-specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 16px;
}
.mat-spec { text-align: center; }
.mat-spec-val {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}
.mat-spec-val .accent { color: var(--accent-blue); }
.mat-spec-label {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.mat-materials { margin-top: 16px; }
.mat-materials h4 {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.mat-list { display: flex; gap: 8px; flex-wrap: wrap; }
.mat-tag {
  font-size: 12px;
  padding: 4px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-secondary);
}

/* Hero 3D Print Visual
   ============================================================ */
.grid-bg {
  position: absolute;
  width: 320px;
  height: 320px;
  background-image:
    linear-gradient(rgba(14, 165, 233, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.06) 1px, transparent 1px);
  background-size: 20px 20px;
  border-radius: 4px;
}
.print-layer {
  position: absolute;
  border: 1px solid rgba(14, 165, 233, 0.12);
  border-radius: 3px;
  background: rgba(14, 165, 233, 0.02);
}
.print-label {
  position: absolute;
  text-align: center;
  z-index: 1;
}
.print-label .big {
  font-family: var(--font-sans);
  font-size: 48px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -2px;
  line-height: 1;
}
.print-label .big span { color: var(--accent-blue); }
.print-label .sub {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 8px;
}
.float-spec {
  position: absolute;
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 10px;
  color: var(--text-secondary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.float-spec strong {
  color: var(--accent-blue);
  font-weight: 600;
}

/* Services Preview (Homepage)
   ============================================================ */
.services-preview {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px var(--gutter) 80px;
}
.sp-title { text-align: center; margin-bottom: 40px; }
.sp-title h2 { margin-bottom: 8px; }
.sp-title p { font-size: 13px; color: var(--text-muted); }
.sp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* Industries Row (Homepage)
   ============================================================ */
.industries-row {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gutter) 80px;
}
.ind-title { text-align: center; margin-bottom: 32px; }
.ind-title h2 { margin-bottom: 8px; }
.ind-title p { font-size: 13px; color: var(--text-muted); }
.ind-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.ind-tag {
  padding: 10px 24px;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: all var(--ease);
}
.ind-tag:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* Why Section (Homepage)
   ============================================================ */
.why-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--gutter) 80px;
  text-align: center;
}
.why-section h2 { margin-bottom: 16px; }
.why-section p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Price Table (Pricing)
   ============================================================ */
.price-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
}
.price-table th {
  text-align: left;
  font-family: var(--font-sans);
  font-size: 10px;
  color: var(--text-faint);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-weight: 500;
  padding: 12px 16px;
  border-bottom: 2px solid #ddd;
}
.price-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}
.price-table tr:hover td {
  background: rgba(14, 165, 233, 0.02);
}
.tech-name {
  font-weight: 600;
  color: var(--text-primary);
}

/* Images
   ============================================================ */
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px;
}
.section-img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: 2px;
  margin-bottom: 24px;
}
.case-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 2px;
  margin-bottom: 20px;
}
.mat-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 2px;
  margin-bottom: 16px;
}

/* 19. Scroll Reveal
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 20. Responsive
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --gutter: 24px;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 18px;
  }

  /* Nav */
  .nav-links {
    display: none;
    flex-direction: column;
    gap: 16px;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    padding: 24px var(--gutter);
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  /* Hero */
  .hero {
    grid-template-columns: 1fr;
    padding-top: 48px;
  }

  .hero-visual {
    height: 260px;
  }

  /* Stats */
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat {
    padding: 24px var(--gutter);
  }

  .stat:nth-child(2) {
    border-right: none;
  }

  /* Modules */
  .modules-grid { grid-template-columns: 1fr; }

  /* Two col */
  .two-col {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* CTA Banner */
  .cta-inner { flex-direction: column; gap: 24px; text-align: center; }
  .cta-inner .btn-cta { width: 100%; text-align: center; display: block; }

  /* Module Detail */
  .module-detail { grid-template-columns: 1fr; gap: 24px; }

  /* Solutions */
  .pain-solution { grid-template-columns: 1fr; }

  /* Cases */
  .case-metrics { flex-wrap: wrap; gap: 24px; }

  /* Pricing */
  .pricing-grid { grid-template-columns: 1fr; }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .section-img { height: 180px; }
  .case-img { height: 160px; }
  .mat-img { height: 140px; }

  /* 3D Print additions */
  .tech-overview { grid-template-columns: 1fr; }
  .mat-specs { grid-template-columns: repeat(2, 1fr); }
  .sp-grid { grid-template-columns: 1fr; }
  .process-step { grid-template-columns: 48px 1fr; gap: 16px; }
  .float-spec { display: none; }
}