@media (max-width: 1440px) {
  :root {
    --gutter: 36px;
  }
}

@media (max-width: 1280px) {
  .hero-copy,
  .system-slide,
  .system-slide.is-flip,
  .flagship-item,
  .flagship-item.is-flip,
  .story-pin,
  .brand-block,
  .split,
  .story-full {
    grid-template-columns: 1fr 1fr;
  }

  .data-item .num {
    font-size: clamp(64px, 10vw, 160px);
  }
}

@media (max-width: 1024px) {
  :root {
    --gutter: 28px;
  }

  .container,
  .hero-kicker,
  .hero-copy,
  .hero-visual,
  .hero-foot,
  .statement p,
  .system-stage-top,
  .system-stage-body,
  .system-stage-foot,
  .flagship-item,
  .story-pin,
  .data-list,
  .scene-content,
  .case-row,
  .brand-block,
  .footer-grid,
  .footer-legal,
  .filters,
  .product-grid,
  .taxonomy,
  .cat-grid,
  .cat-empty,
  .service-hero-visual,
  .service-flow,
  .service-grid,
  .pd,
  .pd-detail,
  .detail-claim,
  .story-full,
  .specs,
  .detail-long,
  .gallery,
  .detail-cta,
  .split,
  .contact-qr,
  .contact-nation {
    width: calc(100% - 48px);
  }

  .contact-nation {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 10vh;
  }

  .nav-inner {
    width: calc(100% - 48px);
  }

  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .hero-copy {
    grid-template-columns: 1fr;
  }

  .hero-en {
    text-align: left;
    padding-bottom: 0;
  }

  .hero-visual {
    height: 46vh;
  }

  .system-stage {
    height: auto;
  }

  .system-stage-pin {
    position: relative;
    height: auto;
    overflow: visible;
    padding-bottom: 48px;
  }

  .system-stage-body {
    height: auto;
    margin-top: 8px;
  }

  .system-slide,
  .flagship-item,
  .story-pin,
  .brand-block,
  .split,
  .story-full,
  .data-item {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .system-slide {
    position: relative;
    inset: auto;
    min-height: 0;
    padding: 28px 0 36px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .statement {
    min-height: 0;
    padding: 48px 0 36px;
  }

  .flagship,
  .data,
  .cta {
    min-height: 0;
    padding: 48px 0;
  }

  .brand-block {
    min-height: 0;
    gap: 12px;
    align-items: start;
    padding: 36px 0 28px;
  }

  .brand-block .display {
    font-size: clamp(28px, 7vw, 40px);
    line-height: 1;
  }

  .brand-block .logo-mark {
    width: 112px;
  }

  .brand-block .logo-mark + p {
    margin-top: 14px;
  }

  .brand-block .link-arrow {
    margin-top: 18px;
  }

  .section-head {
    margin-bottom: 28px;
  }

  .flagship-item,
  .flagship-item.is-flip {
    grid-template-columns: 1fr;
    grid-template-areas:
      "visual"
      "meta";
    gap: 20px;
    margin-bottom: 56px;
  }

  .flagship-item.is-flip .flagship-meta {
    justify-self: start;
    max-width: none;
  }

  .flagship-item .flagship-visual {
    height: auto;
    aspect-ratio: 4 / 3;
  }

  .system-char {
    font-size: clamp(56px, 16vw, 88px);
    height: auto;
    opacity: 1;
    transform: none;
  }

  .system-visual img {
    transform: none;
  }

  .system-rail {
    position: sticky;
    top: calc(var(--nav-h) + 6px);
    right: auto;
    left: 0;
    transform: none;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 18px;
    width: 100%;
    padding: 10px 0 16px;
    background: linear-gradient(to bottom, var(--bg) 55%, transparent);
    z-index: 8;
  }

  .system-rail button {
    padding-right: 0;
  }

  .system-rail button::after {
    display: none;
  }

  .system-visual,
  .flagship-visual,
  .story-visual {
    height: 36vh;
    order: -1;
  }

  .story-pin {
    height: auto;
    min-height: 0;
    padding: 40px 0;
  }

  .flagship-item {
    margin-bottom: 48px;
  }

  .product-grid,
  .taxonomy-list,
  .service-grid,
  .cat-grid {
    grid-template-columns: 1fr 1fr;
  }

  .pd {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: calc(var(--nav-h) + 24px);
    padding-bottom: 48px;
  }

  .pd-info {
    position: static;
  }

  .pd-info h1 {
    font-size: clamp(26px, 6vw, 36px);
    margin: 12px 0 8px;
  }

  .pd-no {
    font-size: 80px;
    top: -4px;
  }

  .pd-thumbs button {
    width: 64px;
  }

  .service-flow {
    grid-template-columns: 1fr 1fr;
  }

  .footer-qr {
    justify-content: flex-start;
  }

  .cursor,
  .cursor-dot {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-h: 64px;
    --gutter: 20px;
  }

  .container,
  .hero-kicker,
  .hero-copy,
  .hero-visual,
  .hero-foot,
  .statement p,
  .system-stage-top,
  .system-stage-body,
  .system-stage-foot,
  .flagship-item,
  .story-pin,
  .data-list,
  .scene-content,
  .case-row,
  .brand-block,
  .footer-grid,
  .footer-legal,
  .filters,
  .product-grid,
  .taxonomy,
  .cat-grid,
  .cat-empty,
  .service-hero-visual,
  .service-flow,
  .service-grid,
  .pd,
  .pd-detail,
  .detail-claim,
  .story-full,
  .specs,
  .detail-long,
  .gallery,
  .detail-cta,
  .split,
  .contact-qr,
  .contact-nation,
  .nav-inner {
    width: calc(100% - 32px);
  }

  .hero {
    padding-top: calc(var(--nav-h) + 18px);
  }

  .hero-title {
    font-size: clamp(44px, 14vw, 72px);
  }

  .hero-visual {
    height: 42vh;
  }

  .statement {
    min-height: 0;
    padding: 40px 0 28px;
  }

  .statement p {
    font-size: clamp(24px, 6.4vw, 36px);
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 24px;
  }

  .link-arrow {
    margin-top: 8px;
  }

  .link-arrow .arr {
    width: 10px;
    height: 10px;
  }

  .product-card .arr {
    width: 11px;
    height: 11px;
  }

  .cat-card-body .arr {
    width: 12px;
    height: 12px;
  }

  .product-grid {
    grid-template-columns: 1fr 1fr;
    gap: 22px 12px;
  }

  .taxonomy-list,
  .spec-row,
  .cat-grid,
  .service-flow,
  .service-grid {
    grid-template-columns: 1fr;
  }

  .cat-hero {
    padding: calc(var(--nav-h) + 28px) 0 24px;
  }

  .cat-hero-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .cat-hero-count {
    padding-bottom: 0;
  }

  .pd-facts li {
    font-size: 13px;
  }

  .pd-detail-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 32px;
    margin-bottom: 20px;
  }

  .spec-row span:last-child {
    text-align: left;
    margin-top: 6px;
  }

  .case-row .media {
    aspect-ratio: 4 / 5;
  }

  .scene {
    min-height: 56vh;
  }

  .cta h2 {
    font-size: clamp(32px, 10vw, 48px);
  }

  .footer {
    padding: 40px 0 20px;
  }

  .footer-legal {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: baseline;
    margin-top: 22px;
    padding-top: 14px;
    gap: 8px;
    font-size: 8px;
    line-height: 1.4;
    white-space: nowrap;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px 20px;
    align-items: start;
  }

  .footer-brand {
    gap: 10px;
  }

  .footer-mark img {
    width: 72px;
  }

  .footer-name {
    font-size: 12px;
    letter-spacing: 0.1em;
  }

  .footer-name small {
    margin-top: 4px;
    font-size: 11px;
  }

  .footer-aside {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 14px;
  }

  .footer-links {
    display: grid;
    grid-template-columns: repeat(2, max-content);
    justify-content: end;
    gap: 8px 16px;
    font-size: 13px;
    text-align: right;
  }

  .footer-qr {
    justify-content: flex-end;
    gap: 10px;
  }

  .footer-qr img {
    width: 56px;
    height: 56px;
    padding: 2px;
  }

  .footer-qr figcaption {
    margin-top: 4px;
    font-size: 9px;
  }

  .page-hero h1 {
    font-size: clamp(32px, 8vw, 48px);
  }

  .filters {
    gap: 4px 16px;
  }

  .story-full img {
    height: 42vh;
  }

  .preloader-mark {
    width: min(132px, 42vw);
  }

  .grain {
    display: none;
  }
}

@media (max-width: 430px) {
  .hero-title {
    font-size: 42px;
  }

  .data-item .num {
    font-size: 72px;
  }

  .brand-block .display {
    font-size: 28px;
  }

  .brand-block .logo-mark {
    width: 96px;
  }

  .nav-overlay-list a {
    font-size: 30px;
    padding: 16px 0 16px 14px;
  }

  .product-card h3 {
    font-size: 14px;
  }

  .pd-thumbs button {
    width: 56px;
  }
}

@media (max-width: 375px) {
  .hero-title {
    font-size: 36px;
  }

  .kicker {
    letter-spacing: 0.1em;
    font-size: 11px;
  }
}