/* Screen-only reading refinements. Existing print/PDF styling is untouched. */
@media screen {
  :root {
    --type-section: clamp(40px, 4vw, 56px);
    --type-body: 16px;
    --type-caption: 14px;
    --type-label: 12px;
    --muted: #565b58;
    --soft: #f5f5f5;
  }

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.65;
  }

  .eyebrow, .ai-index {
    font-size: var(--type-label);
    font-weight: 600;
    letter-spacing: .11em;
    line-height: 1.5;
  }
  .main-nav a { font-size: 14px; font-weight: 600; }
  .site-header.is-scrolled { box-shadow: 0 1px 0 rgba(0,0,0,.08); }

  /* The hero remains the largest headline; case titles support the imagery. */
  .slide-copy h1, .slide-copy h2 {
    font-size: clamp(48px, 5.3vw, 80px);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -.035em;
  }
  .slide-copy span { font-size: clamp(15px, 1.15vw, 18px); line-height: 1.75; max-width: 600px; }
  .slide-copy > p { font-size: 12px; letter-spacing: .12em; }
  .hero-actions a { font-size: 15px; font-weight: 600; min-height: 40px; display: inline-flex; align-items: center; }
  .showcase-ident strong { font-size: 15px; line-height: 1.5; }
  .showcase-ident span, .showcase-caption > a { font-size: 12px; letter-spacing: .01em; }

  .section { padding-block: clamp(80px, 7.4vw, 108px); }
  .section-heading { gap: 48px; margin-bottom: 40px; }
  .section-heading > div { min-width: 0; }
  .section-heading h2, .services-section h2, .about-section h2 {
    font-size: var(--type-section);
    font-weight: 600;
    line-height: 1.22;
    letter-spacing: -.025em;
    margin-top: 14px;
  }
  .section-heading > p {
    font-size: var(--type-body);
    line-height: 1.75;
    max-width: 360px;
    flex: 0 1 360px;
    text-wrap: pretty;
  }
  .stats { padding-block: 60px 76px; }
  .small-heading { font-size: 14px; letter-spacing: .02em; margin-bottom: 22px; }
  .stats strong, .ads-results strong {
    font-size: clamp(44px, 4.6vw, 66px);
    letter-spacing: -.045em;
    font-variant-numeric: lining-nums tabular-nums;
  }
  .stats span, .ads-results span { font-size: var(--type-caption); line-height: 1.6; }

  .account-head strong, .account-item:nth-child(-n+2) .account-head strong {
    font-size: clamp(40px, 4.2vw, 60px);
    letter-spacing: -.045em;
  }
  .account-item:nth-child(3) .account-head strong { font-size: clamp(38px, 3.7vw, 52px); }
  .account-head span { font-size: var(--type-caption); line-height: 1.6; margin: 12px 0 24px; }
  .account-item p, .content-item p, .wpc-content p,
  .site-feature p, .site-pair p {
    font-size: var(--type-body);
    line-height: 1.75;
    color: var(--muted);
    text-wrap: pretty;
  }
  .content-metric { flex-wrap: wrap; gap: 8px 14px; }
  .content-metric strong { font-size: clamp(36px, 3.5vw, 50px); letter-spacing: -.045em; }
  .content-metric span { font-size: 13px; line-height: 1.5; }
  .content-item h3, .wpc-content h3, .site-caption h3 {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: -.015em;
    margin-top: 18px;
  }
  .site-caption h3 { margin-top: 0; }
  .site-caption { flex-wrap: wrap; gap: 8px 20px; }
  .site-caption a { font-size: 13px; line-height: 1.6; }
  .site-feature p, .site-pair p { margin-top: 12px; }
  .site-pair { margin-top: 60px; }
  .localization-grid strong { font-size: clamp(40px, 4.3vw, 62px); letter-spacing: -.045em; white-space: nowrap; }
  .localization-grid span { font-size: var(--type-caption); line-height: 1.6; }
  .localization-media figcaption, .ads-proof figcaption, .wpc-profile figcaption { font-size: 13px; line-height: 1.6; }
  .process-line, .method-line { font-size: 14px; line-height: 1.8; letter-spacing: 0; }

  .market-head h3 { font-size: 24px; letter-spacing: -.015em; line-height: 1.4; }
  .market-head span, .market-row small { font-size: 12px; }
  .market-row > span { font-size: 15px; line-height: 1.6; }
  .market-row strong { font-size: 24px; letter-spacing: -.02em; }
  .market-head, .market-row { padding-block: 20px; }
  .ads-results { margin-bottom: 44px; }
  .wpc-metrics strong { font-size: clamp(36px, 3.8vw, 54px); letter-spacing: -.045em; }
  .wpc-metrics span { font-size: var(--type-caption); line-height: 1.6; }
  .basis { font-size: 13px; line-height: 1.75; }
  .wpc-month { margin-top: 40px; }
  .wpc-month small { font-size: 12px; letter-spacing: .06em; }
  .wpc-month strong { font-size: clamp(44px, 4.5vw, 64px); letter-spacing: -.045em; }
  .wpc-month > span, .wpc-month p { font-size: 15px; line-height: 1.8; }
  .wpc-content article > div { display: grid; grid-template-columns: auto 1fr auto 1fr; align-items: baseline; column-gap: 10px; row-gap: 6px; }
  .wpc-content article > div strong { font-size: 32px; letter-spacing: -.04em; white-space: nowrap; }
  .wpc-content article > div span { font-size: 12px; line-height: 1.5; margin-right: 0; }
  .personal-stats strong { font-size: clamp(36px, 4vw, 58px); letter-spacing: -.045em; }
  .personal-stats span { font-size: var(--type-caption); line-height: 1.6; }

  /* Deliverable titles sit between case headlines and ordinary captions. */
  .ai-grid .ai-delivery-head h3 { font-size: clamp(25px, 2.35vw, 32px); line-height: 1.35; letter-spacing: -.02em; font-weight: 600; }
  .ai-grid .ai-delivery-head p { font-size: var(--type-body); line-height: 1.8; }
  .ai-delivery-head { margin-bottom: 26px; }
  .ai-report-context strong { font-size: 22px; line-height: 1.4; letter-spacing: -.015em; }
  .ai-report-context span { font-size: 13px; line-height: 1.6; }
  .ai-story figcaption, .ai-story-text small, .ai-story-text span { font-size: 13px; line-height: 1.6; letter-spacing: .01em; }
  .ai-story-text strong { font-size: 21px; line-height: 1.45; letter-spacing: -.01em; }
  .ai-story-text p { font-size: 16px; line-height: 1.8; }
  .ai-grid .ai-open-full { font-size: 15px; font-weight: 600; min-height: 48px; padding: 12px 22px; }

  .services-section h2 { margin-bottom: 34px; }
  .service-row { grid-template-columns: 64px minmax(0,1fr) minmax(180px,310px); padding-block: 26px; }
  .service-row h3 { font-size: clamp(22px, 2vw, 28px); letter-spacing: -.02em; font-weight: 600; line-height: 1.4; }
  .service-row p { font-size: 14px; line-height: 1.7; }
  .about-section { padding-block: clamp(80px, 7.4vw, 108px); background: #f1f2f2; }
  .about-grid { grid-template-columns: 1.1fr 1fr; gap: 56px; }
  .about-section h2 { font-size: clamp(30px, 3.2vw, 46px); line-height: 1.3; }
  .about-grid > p { font-size: 18px; line-height: 1.85; }
  .contact-section h2 { font-size: clamp(40px, 4.4vw, 64px); letter-spacing: -.03em; line-height: 1.25; font-weight: 600; }
  .contact-section p:not(.eyebrow) { font-size: 15px; line-height: 1.8; color: #e0e0e0; }
  .contact-links small, .contact-qr figcaption { font-size: 13px; line-height: 1.6; color: #d0d0d0; letter-spacing: .02em; }
  .contact-links strong, .contact-links a { font-size: 17px; line-height: 1.6; }
  .site-footer { font-size: 12px; line-height: 1.6; letter-spacing: .01em; }
  .evidence-dialog { border-radius: 16px; }
  .evidence-dialog > p { font-size: 14px; line-height: 1.6; }
  .dialog-close { font-size: 14px; min-height: 44px; }

  .reveal { transform: translate3d(0,14px,0); transition-duration: .6s; }
  .reveal.visible { transform: none; }
  @media (hover:hover) and (pointer:fine) { .evidence-button:hover { transform: translate3d(0,-2px,0); } }

  @media (max-width:1100px) {
    .main-nav { gap: 22px; }
    .main-nav a { font-size: 13px; }
    .section-heading { gap: 36px; }
    .section-heading > p { flex-basis: 290px; }
    .contact-grid { gap: 40px; }
    .contact-method { grid-template-columns: minmax(0,1fr) 125px; gap: 16px; }
    .contact-qr, .contact-qr img { width: 125px; height: auto; }
    .contact-links strong, .contact-links a { font-size: 15px; }
  }
  @media (max-width:850px) {
    .section-heading > p { max-width: 540px; margin-top: 20px; }
    .about-grid { grid-template-columns: 1fr; gap: 28px; }
    .about-grid > p { max-width: 640px; }
    .service-row { grid-template-columns: 40px minmax(0,1fr); }
    .service-row p { grid-column: 2; }
    .contact-method { grid-template-columns: minmax(0,1fr) 146px; }
    .contact-qr, .contact-qr img { width: 146px; }
    .mobile-menu a { letter-spacing: -.015em; }
    .menu-toggle { font-size: 14px; }
  }
  @media (max-width:640px) {
    :root { --type-section: clamp(30px, 8.4vw, 36px); --type-body: 15px; --type-caption: 13px; --type-label: 11px; }
    .section { padding-block: 64px; }
    .section-heading { margin-bottom: 30px; }
    .section-heading h2, .services-section h2 { line-height: 1.25; }
    .section-heading > p { margin-top: 16px; }
    .eyebrow, .ai-index { letter-spacing: .08em; }
    .slide-copy h1, .slide-copy h2 { font-size: clamp(30px, 8.8vw, 40px); letter-spacing: -.025em; line-height: 1.2; }
    .slide-copy-wpc h2 { font-size: clamp(30px, 8.8vw, 40px)!important; }
    .slide-copy > p { font-size: 11px; letter-spacing: .065em; }
    .slide-copy span { font-size: 14px; line-height: 1.75; max-width: 350px; }
    .hero-actions { margin-top: 20px; gap: 28px; }
    .hero-actions a { font-size: 14px; min-height: 44px; }
    .showcase-ident strong { font-size: 12px; }
    .showcase-caption > a { font-size: 11px; }
    .stats { padding-block: 42px 52px; }
    .stats strong, .ads-results strong { font-size: clamp(24px, 7.2vw, 34px); letter-spacing: -.045em; }
    .stats span, .ads-results span { font-size: 12px; line-height: 1.55; text-wrap: balance; }
    .small-heading { font-size: 13px; }
    .account-head strong, .account-item:nth-child(-n+2) .account-head strong, .account-item:nth-child(3) .account-head strong { font-size: 44px; }
    .account-grid { scroll-padding-inline: 20px; overscroll-behavior-inline: contain; scrollbar-width: none; }
    .account-grid::-webkit-scrollbar { display: none; }
    .account-head span { font-size: 13px; margin-bottom: 20px; }
    .rail-position { font-size: 12px; }
    .content-metric strong { font-size: 40px; }
    .content-metric span { font-size: 12px; }
    .content-item h3, .wpc-content h3 { font-size: 21px; }
    .localization-grid > div + div { margin-left: 0; padding-left: 10px; }
    .localization-grid > div { min-width: 0; }
    .localization-grid strong { font-size: clamp(21px, 6.35vw, 30px); letter-spacing: -.055em; }
    .localization-grid span { font-size: 12px; line-height: 1.55; }
    .process-line, .method-line { font-size: 13px; line-height: 1.9; }
    .market-head h3 { font-size: 22px; }
    .market-head span, .market-row small { font-size: 11px; }
    .market-row > span { font-size: 13px; }
    .market-row strong { font-size: 21px; }
    .wpc-metrics strong { font-size: 40px; }
    .wpc-metrics span { font-size: 13px; }
    .wpc-month strong { font-size: 48px; }
    .wpc-month > span, .wpc-month p { font-size: 14px; }
    .wpc-content article > div { grid-template-columns: auto 1fr auto 1fr; gap: 8px; }
    .wpc-content article > div strong { font-size: 28px; }
    .wpc-content article > div span { font-size: 12px; }
    .site-caption h3 { font-size: 21px; }
    .site-caption a { font-size: 13px; }
    .site-pair { margin-top: 44px; gap: 44px; }
    .personal-stats strong { font-size: clamp(18px, 5.4vw, 25px); letter-spacing: -.055em; }
    .personal-stats span { font-size: 11px; line-height: 1.6; }
    .personal-media { margin-top: 32px; }
    .ai-grid .ai-delivery-head h3 { font-size: 24px; }
    .ai-grid .ai-delivery-head p { font-size: 15px; line-height: 1.8; }
    .ai-report-context strong { font-size: 20px; }
    .ai-report-context span { font-size: 12px; }
    .ai-story-text strong { font-size: 20px; }
    .ai-story-text p { font-size: 15px; }
    .ai-story figcaption, .ai-story-text small, .ai-story-text span { font-size: 12px; }
    .service-row { grid-template-columns: 30px minmax(0,1fr); gap: 12px; }
    .service-row h3 { font-size: 22px; }
    .service-row p { font-size: 13px; }
    .about-section { padding-block: 64px; }
    .about-section h2 { font-size: clamp(27px, 7.7vw, 34px); letter-spacing: -.025em; }
    .about-grid > p { font-size: 16px; line-height: 1.85; }
    .contact-section { padding-block: 64px; }
    .contact-section h2 { font-size: clamp(32px, 8.8vw, 40px); }
    .contact-section p:not(.eyebrow) { font-size: 14px; }
    .contact-method { grid-template-columns: minmax(0,1fr) 125px; }
    .contact-qr, .contact-qr img { width: 125px; }
    .contact-links strong, .contact-links a { font-size: 15px; }
    .site-footer { font-size: 11px; }
    .evidence-dialog > p { font-size: 13px; }
  }
  @media (max-width:380px) {
    .wpc-content article > div { grid-template-columns: auto 1fr; }
    .slide-copy-main h1 { font-size: 30px; }
  }
  @media (prefers-reduced-motion:reduce) {
    .reveal, .evidence-button { transition: none; transform: none; }
  }
}