@media (min-width: 1500px) {
  .hero { min-height: 756px; }
}
@media (max-width: 1100px) {
  .shell { width: calc(100% - 64px); }
  .hero { gap: 15px; min-height: 650px; padding-top: 45px; }
  .hero h1 { font-size: 50px; }
  .floating-word { transform: scale(.9) rotate(-5deg); transform-origin: left center; }
  .floating-note { transform: scale(.9) rotate(5deg); transform-origin: right center; }
  .feature-row { gap: 60px; }
  .feature-conversation .feature-copy { padding-left: 0; }
  .story-visual { padding-inline: 22px; }
  .conversation-visual { padding-inline: 24px; }
  .collect-card { padding-inline: 10px; }
  .collect-card b { font-size: 15px; }
  .principles { gap: 32px; }
  .company-section { gap: 50px; }
}
@media (max-width: 800px) {
  html { scroll-padding-top: 87px; }
  .shell { width: calc(100% - 48px); }
  .header-inner { min-height: 76px; gap: 18px; }
  .company-name { font-size: 13px; letter-spacing: .02em; }
  .site-nav { gap: 21px; }
  .site-nav a { font-size: 11px; }
  .hero { grid-template-columns: 1fr 1fr; padding-top: 51px; padding-bottom: 51px; min-height: 0; }
  .hero h1 { font-size: 39px; }
  .hero-description { font-size: 12px; }
  .product-signature strong { font-size: 17px; }
  .product-signature span { font-size: 8px; }
  .hero-scene { align-self: center; }
  .floating-word { transform: scale(.72) rotate(-5deg); left: -8px; }
  .floating-note { transform: scale(.75) rotate(5deg); right: -3px; bottom: 7%; }
  .scene-caption { top: -10px; right: 3px; font-size: 8px; gap: 8px; }
  .caption-line { width: 18px; }
  .scene-label { font-size: 8px; bottom: 0; }
  .rhythm-inner p { font-size: 12px; }
  .rhythm-inner div { font-size: 9px; gap: 12px; }
  .rhythm-inner i { width: 20px; }
  .product-section { padding-top: 75px; padding-bottom: 43px; }
  .section-heading { gap: 30px; margin-bottom: 50px; }
  .section-heading h2 { font-size: 30px; }
  .section-intro { font-size: 11px; }
  .feature-row { gap: 40px; padding-bottom: 48px; }
  .feature-copy h3 { font-size: 27px; margin-top: 10px; }
  .feature-copy > p { font-size: 12px; }
  .feature-copy .feature-detail { font-size: 11px; }
  .story-visual { padding: 20px 16px 15px; }
  .window-label { padding-inline: 15px; font-size: 8px; }
  .story-text { padding: 5px 15px 16px; }
  .story-text p { font-size: 22px; }
  .expression-pills { padding: 12px 15px 16px; gap: 8px; }
  .expression-pills small { display: block; margin: 4px 0 0; }
  .conversation-visual { padding-inline: 18px; }
  .scenario-choice { font-size: 10px; padding-inline: 9px; }
  .dialogue-line p { font-size: 15px; }
  .dialogue-line > div { padding: 13px; }
  .dialogue { min-height: 205px; gap: 20px; }
  .collection-visual { padding-inline: 18px; min-height: 340px; }
  .collect-card b { font-size: 12px; }
  .collect-card small { font-size: 8px; }
  .collect-card svg { height: 65px; margin-bottom: 13px; }
  .quote-art { height: 87px; font-size: 100px; }
  .company-section { gap: 35px; padding-block: 65px; }
  .company-section h2 { font-size: 18px; }
}
@media (max-width: 600px) {
  .shell { width: calc(100% - 40px); }
  .header-inner { flex-wrap: wrap; gap: 0 12px; padding-block: 12px; min-height: 70px; }
  .company-name { font-size: 13px; }
  .company-name { gap: 7px; padding-block: 0; }
  .company-name .company-mark { width: 36px; height: 36px; border-radius: 7px; }
  .site-nav { flex: 1 0 100%; justify-content: space-between; gap: 12px; }
  .site-nav a { font-size: 12px; }
  .js .menu-toggle { display: flex; margin-left: auto; font-size: 11px; }
  .js .site-nav { display: none; }
  .js .site-header[data-menu-open] .site-nav { display: flex; }
  .hero { grid-template-columns: 1fr; gap: 16px; padding-top: 41px; padding-bottom: 23px; }
  .hero h1 { font-size: clamp(38px, 10.6vw, 52px); line-height: 1.38; margin-top: 25px; }
  .product-signature strong { font-size: 19px; }
  .product-signature span { font-size: 9px; }
  .hero-description { font-size: 13px; line-height: 2; }
  .hero-footnote { margin-top: 20px; }
  .hero-scene { max-width: 460px; width: 100%; margin: 19px auto 0; }
  .floating-word { transform: scale(.82) rotate(-5deg); left: 0; }
  .floating-note { transform: scale(.82) rotate(5deg); right: 0; bottom: 10%; }
  .scene-caption { right: 17px; font-size: 9px; }
  .scene-label { bottom: 5%; }
  .rhythm-inner { min-height: 71px; justify-content: center; text-align: center; flex-direction: column; gap: 7px; padding-block: 14px; }
  .rhythm-inner p { font-size: 12px; }
  .rhythm-inner div { font-size: 9px; }
  .product-section { padding-top: 60px; padding-bottom: 25px; }
  .section-heading { display: block; margin-bottom: 33px; }
  .section-heading h2 { font-size: 29px; line-height: 1.6; }
  .section-intro { margin-top: 23px; font-size: 12px; }
  .section-intro br { display: none; }
  .feature-row { grid-template-columns: 1fr; gap: 29px; padding-top: 20px; padding-bottom: 45px; }
  .feature-row + .feature-row { padding-top: 25px; }
  .feature-copy { max-width: none; }
  .feature-copy h3 { font-size: 28px; margin-bottom: 15px; }
  .feature-copy > p { font-size: 14px; }
  .feature-story .feature-copy, .feature-collection .feature-copy { grid-row: 1; }
  .feature-copy .feature-detail { font-size: 12px; }
  .topic-tags { margin-top: 22px; font-size: 11px; }
  .feature-visual { max-width: 460px; width: 100%; margin-inline: auto; }
  .story-visual { padding: 25px 24px 19px; }
  .story-text { padding: 4px 22px 20px; }
  .story-text p { font-size: 25px; }
  .window-label { font-size: 10px; }
  .expression-pills { padding: 14px 22px 20px; gap: 10px; }
  .expression-pills small { display: inline; margin-left: 5px; }
  .conversation-visual { padding: 26px 22px 19px; }
  .scenario-choice { font-size: 11px; padding-inline: 12px; }
  .dialogue-line p { font-size: 16px; }
  .dialogue { min-height: 194px; }
  .collection-visual { min-height: 360px; padding: 27px 24px 18px; }
  .collect-card { padding-inline: 10px; }
  .collect-card b { font-size: 14px; }
  .collect-card small { font-size: 9px; }
  .collect-card svg { height: 80px; }
  .quote-art { height: 102px; font-size: 116px; }
  .collection-label { font-size: 14px; }
  .approach-section { padding-block: 55px; }
  .approach-heading h2 { font-size: 28px; }
  .approach-heading > p:last-child { font-size: 12px; }
  .principles { grid-template-columns: 1fr; gap: 27px; margin-top: 35px; }
  .principles article { padding-top: 20px; }
  .principles h3 { margin: 13px 0 10px; font-size: 15px; }
  .principles p { font-size: 13px; }
  .principle-value { font-size: 36px; }
  .company-section { grid-template-columns: 1fr; gap: 22px; padding-block: 55px; }
  .company-section h2 { font-size: 19px; }
  .company-copy p { font-size: 13px; }
  .footer-main { align-items: flex-start; font-size: 11px; gap: 12px; }
  .footer-main > span { padding-top: 13px; }
  .footer-company { gap: 6px; min-width: 0; }
  .footer-company .company-mark { width: 32px; height: 32px; }
  .back-to-top { white-space: nowrap; gap: 7px; }
  .site-footer { padding-top: 18px; padding-bottom: 16px; }
  .footer-filing { margin-top: 12px; }
}
@media (max-width: 360px) {
  .company-name { font-size: 12px; letter-spacing: 0; }
  .header-inner { column-gap: 8px; }
  .menu-toggle { padding-left: 5px; gap: 6px; }
  .collect-card b { font-size: 12px; }
  .collect-card small { font-size: 8px; }
  .collect-card svg { height: 68px; }
  .quote-art { height: 90px; font-size: 100px; }
  .collection-visual { padding-inline: 19px; }
  .expression-pills small { display: block; margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}