@media (max-width: 900px) {
  :root {
    --section-space: 76px;
    --section-heading-gap: 32px;
  }
  .shell { width: min(100% - 32px, 760px); }
  .section { padding: var(--section-edge-space) 0; }
  .hero { min-height: auto; }
  .hero-grid { grid-template-columns: 1fr; padding-top: 62px; }
  .hero-copy { text-align: center; }
  .hero-copy .eyebrow, .hero-copy .button-row { justify-content: center; }
  .hero-copy .text-link { justify-content: center; }
  .hero-lead { margin-inline: auto; }
  .hero-visual { min-height: 520px; }
  .proof { margin-top: 0; padding-bottom: 30px; }
  .proof + .solutions { padding-top: calc(var(--section-space) - 30px); }
  .proof-grid { grid-template-columns: 1fr 1fr; }
  .proof-grid > div:nth-child(2) { border-right: 0; }
  .proof-grid > div:nth-child(-n+2) { border-bottom: 1px solid var(--border); }
  .solution-grid, .how-grid, .results-grid, .support-grid, .partnership-grid, .faq-grid { grid-template-columns: 1fr; }
  .how-grid .video-card { order: 0; }
  .solution-card { grid-template-columns: 1fr 1fr; }
  .split-heading { grid-template-columns: 1fr; gap: 15px; }
  .blog-section .split-heading { grid-template-columns: 1fr; gap: 15px; }
  .blog-section .split-heading > .text-link { justify-self: start; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .steps-grid li { min-height: 260px; }
  .steps-grid h3 { margin-top: 30px; }
  .support-grid { gap: 45px; }
  .help-card { min-height: 360px; }
  .partnership-grid { min-height: auto; row-gap: 36px; align-items: stretch; }
  .partnership-copy { width: 100%; }
  .partnership-media { width: 100%; height: 500px; }
  .partnership-media video { display: none; }
  .partnership-media img { position: relative; z-index: 1; display: block; }
  .featured-article { grid-template-columns: 1fr; gap: 30px; }
  .final-cta-inner { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .cookie-banner { grid-template-columns: 1fr; gap: 14px; }
  .cookie-banner-actions { display: grid; grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 640px) {
  :root {
    --section-space: 64px;
    --section-heading-gap: 28px;
    --content-section-gap: 40px;
    --footer-adjacent-space: 34px;
  }
  body { font-size: 15px; }
  .shell { width: calc(100% - 24px); }
  .age-bar { min-height: 34px; font-size: 8px; }
  .site-header { padding: 8px 0; }
  .header-inner { height: 58px; padding: 6px 7px 6px 12px; border-radius: 18px; }
  .brand-mark { gap: 7px; font-size: 10px; }
  .brand-logo-image { width: 36px; }
  .login-link { display: none; }
  .header-login-icon { display: grid; }
  .header-inner > .logo-link .brand-mark > span { display: none; }
  .header-actions { gap: 7px; }
  .header-download { min-height: var(--button-min-height); padding: 11px 13px; font-size: 10px; }
  .burger { width: 44px; height: 44px; }
  .hero-grid { padding: 52px 0 55px; }
  .hero h1 { margin-top: 0; font-size: var(--type-page-title); }
  html[data-locale="ja"] .hero h1,
  html[data-locale="ja"] .download-hero-copy h1,
  html[data-locale="zh-CN"] .hero h1,
  html[data-locale="zh-CN"] .download-hero-copy h1 { font-size: var(--type-page-title-cjk); line-height: 1.12; }
  .hero-lead { font-size: 15px; }
  .button-row { align-items: stretch; }
  .hero-copy .button-row .button { flex: 1 1 150px; }
  .hero-visual { min-height: 390px; }
  .hero-workspace { width: 100%; }
  .hero-proof-cue { width: 31%; height: 72%; right: 10px; bottom: 10px; }
  .workspace-insight { gap: 7px; }
  .context-bars { gap: 4px; }
  .proof-grid { border-radius: 19px; }
  .proof-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .proof-grid > div { min-height: 92px; padding: 18px 14px; gap: 6px; }
  .proof-grid > div > span { min-height: 18px; font-size: 15px; line-height: 1.15; }
  .proof-grid > div > strong { font-size: 8px; }
  .proof-grid > div:nth-child(1) { order: 1; border-bottom: 0; }
  .proof-grid > div:nth-child(3) { order: 2; border-bottom: 0; }
  .proof-grid > div:nth-child(4) { order: 3; border-right: 0; }
  .proof-grid > .proof-formats { min-height: 0; padding: 16px 18px 18px; order: 4; grid-column: 1 / -1; border-top: 1px solid var(--border); border-right: 0; border-bottom: 0; }
  .proof-formats ul { font-size: 9px; line-height: 1.6; letter-spacing: .025em; }
  .section { padding: var(--section-edge-space) 0; }
  .section-heading { margin-bottom: var(--section-heading-gap); }
  .section-heading h2, .how-grid h2, .results-grid h2, .support-grid h2, .partnership-copy h2, .faq-grid h2 { font-size: var(--type-section-title); }
  .section-heading p, .how-grid p, .results-grid > div > p, .support-grid > div > p, .partnership-copy > p, .faq-grid > div > p { font-size: 14px; }
  .solution-grid { grid-template-columns: 1fr; }
  .solution-card { min-height: 0; padding: 26px; grid-template-columns: 1fr; border-radius: 27px; }
  .solution-card h3 { font-size: var(--type-feature-title); }
  .product-console,
  .solution-proof { max-width: 100%; transform: none; }
  .ai-card .product-console,
  .ai-card .solution-proof { transform: none; }
  .video-card { min-height: 390px; padding: 12px; border-radius: 27px; }
  .video-label { left: 20px; right: 20px; bottom: 18px; }
  .video-label strong { display: none; }
  .how-grid { gap: 45px; }
  .how-steps { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .platform-card { min-height: 145px; padding: 21px; }
  .platform-logo { width: 52px; height: 52px; border-radius: 17px; }
  .platform-logo img { border-radius: 13px; }
  .secondary-platforms { grid-template-columns: 1fr 1fr; gap: 16px; }
  .secondary-platform-label { grid-column: 1 / -1; }
  .secondary-platform-logo.is-wide { width: 36px; justify-content: start; overflow: hidden; }
  .secondary-platform-logo.is-wide img { width: auto; max-width: none; height: 28px; }
  .secondary-platform-logo.on-dark { height: 30px; padding: 4px; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid li { min-height: 210px; }
  .steps-grid .step-index { width: 58px; height: 58px; border-radius: 18px; }
  .results-proof { padding: 8px; border-radius: 24px; }
  .results-proof img { border-radius: 18px; }
  .results-proof figcaption { min-height: 52px; padding: 12px 10px 3px; }
  .help-card { padding: 32px; border-radius: 27px; }
  .help-card > strong { font-size: 62px; }
  .partnership-media { height: 390px; border-radius: 27px; }
  .partnership-media::before { width: 74%; }
  .partnership-media img { padding: 10px; }
  .featured-article { padding: 14px; border-radius: 27px; }
  .article-visual { min-height: 250px; }
  .article-visual > img, .article-visual > picture > img { min-height: 250px; }
  .article-visual-caption { left: 22px; right: 22px; bottom: 20px; }
  .featured-article > div:last-child { padding: 5px 10px 20px; }
  .featured-article h3 { font-size: 31px; }
  .article-meta { flex-direction: column; }
  .faq-grid { gap: 35px; }
  .faq-list summary { font-size: 12px; }
  .final-cta { padding: var(--section-edge-space) 0 var(--footer-adjacent-space); }
  .final-cta h2 { font-size: var(--type-section-title); }
  .final-cta .button { flex: 1 1 150px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 22px; }
  .footer-bottom { padding: 18px 0; align-items: flex-start; gap: 15px; flex-direction: column; }
  .footer-bottom-meta { width: 100%; }
  .footer-bottom > [data-cookie-preferences] { margin-right: 0; margin-left: 68px; }
  .partnership-actions { display: grid; grid-template-columns: 1fr; }
  .partnership-actions .button { width: 100%; }
  .footer-bottom .footer-back-to-top { left: 14px; bottom: 14px; width: 48px; height: 48px; }
  .placeholder-card { padding: 35px 24px; }
  .consent-overlay { padding: 12px; }
  .age-gate-card { padding: 24px 20px; border-radius: 26px; }
  .age-gate-card .brand-mark { align-self: center; }
  .age-gate-badge { width: 64px; height: 64px; margin: 22px 0 17px; border-radius: 21px; font-size: 19px; }
  .age-gate-card h2 { font-size: 31px; }
  .age-gate-actions { grid-template-columns: 1fr; }
  .cookie-banner { bottom: 10px; width: calc(100% - 20px); padding: 16px; border-radius: 20px; }
  .cookie-banner-actions { grid-template-columns: 1fr; }
  .cookie-preferences-card { max-height: calc(100vh - 24px); padding: 23px 18px; border-radius: 25px; }
  .cookie-preferences-head h2 { font-size: 30px; }
  .cookie-category { padding: 15px; }
  .cookie-category small { line-height: 1.4; }
  .cookie-preferences-actions { display: grid; grid-template-columns: 1fr; }
}
@media (max-width: 340px) {
  .header-inner { gap: 4px; }
  .header-actions { gap: 3px; }
  .header-download { padding-inline: 10px; }
  .proof-grid > div { padding-inline: 10px; }
  .proof-grid > .proof-formats { padding-inline: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .card-hover-lift:hover, .card-hover-lift:focus-visible { transform: none; }
  .partnership-media video { display: none; }
  .partnership-media img { position: relative; z-index: 1; display: block; }
}