:root {
  --brand-limestone: #f2f2f2;
  --brand-sky: #aacff4;
  --brand-blue: #2980eb;
  --brand-obsidian: #081120;
  --primary: var(--brand-blue);
  --primary-soft: #eef7ff;
  --primary-border: var(--brand-sky);
  --ink: var(--brand-obsidian);
  --muted: #4f5f72;
  --subtle: #7b8794;
  --line: #dfe5ec;
  --paper: var(--brand-limestone);
  --card: #ffffff;
  --white: #ffffff;
  --container: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 72px;
  padding: 16px 24px;
  color: var(--ink);
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.site-header-inner {
  width: min(var(--container), 100%);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  width: 158px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

.nav a,
.language-switcher button,
.mobile-menu-toggle,
.contact-toggle,
.contact-menu a,
.footer-nav a,
.product-card,
.link-panel a,
.business-entry-grid a {
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.nav a:hover {
  color: var(--primary);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  cursor: pointer;
}

.mobile-menu-toggle span {
  position: absolute;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.mobile-menu-toggle span:nth-child(1) {
  transform: translateY(-5px);
}

.mobile-menu-toggle span:nth-child(3) {
  transform: translateY(5px);
}

.mobile-menu-toggle:hover,
.mobile-menu-toggle[aria-expanded="true"] {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: var(--primary-border);
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.language-switcher button {
  min-width: 36px;
  min-height: 32px;
  padding: 0 8px;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  border: 0;
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
}

.language-switcher button:hover,
.language-switcher button[aria-pressed="true"] {
  color: var(--primary);
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 680px;
  display: grid;
  justify-content: center;
  align-items: end;
  padding: 128px 24px 32px;
  overflow: hidden;
  color: var(--white);
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background: rgba(8, 17, 32, 0.58);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(var(--container), 100%);
  padding-bottom: 80px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--brand-sky);
  font-size: 14px;
}

.hero h1 {
  max-width: 920px;
  margin: 0;
  font-size: 44px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: 0;
}

.hero-subtitle {
  margin: 24px 0 0;
  font-size: 30px;
  line-height: 1.25;
  font-weight: 800;
}

.hero-copy {
  max-width: 800px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 18px;
}

.section {
  padding: 72px 24px;
  scroll-margin-top: 84px;
}

.page-main {
  padding-top: 72px;
}

.page-hero {
  min-height: calc(100vh - 72px);
  display: grid;
  align-content: center;
}

.section > * {
  width: min(var(--container), 100%);
  margin-right: auto;
  margin-left: auto;
}

.section-heading {
  max-width: 840px;
  margin-bottom: 24px;
}

.section-heading.compact {
  max-width: 760px;
}

h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: 0;
}

p {
  margin: 12px 0 0;
}

.home-summary,
.smart-products,
.cloud {
  background: var(--white);
}

.about,
.veepai,
.industry {
  background: var(--paper);
}

.section-heading p,
.split-copy,
.capability-modules p,
.business-entry-grid span,
.strategy-strip p,
.strategy-grid p,
.product-scene-heading p,
.text-list-grid p,
.timeline-list p,
.principles p,
.value-statement p,
.product-card-body p,
.note-block p,
.capability-list p {
  color: var(--muted);
  font-size: 15px;
}

.capability-modules,
.business-entry-grid,
.strategy-strip,
.strategy-grid,
.strategy-path,
.product-scene-list,
.product-scene-group,
.text-list-grid,
.product-showcase-grid,
.timeline-list,
.scenario-grid,
.link-panel,
.content-block {
  display: grid;
  gap: 16px;
}

.capability-modules {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 24px;
}

.capability-modules article,
.business-entry-grid a,
.product-card,
.strategy-strip article,
.strategy-panel,
.strategy-grid article,
.product-scene-group,
.principles div,
.value-statement,
.value-statement-side article,
.text-list-grid article,
.timeline-list article,
.scenario-grid a,
.note-block,
.link-panel a {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
}

.capability-modules article,
.strategy-strip article,
.strategy-grid article,
.principles div,
.text-list-grid article,
.timeline-list article,
.note-block {
  padding: 24px;
}

.capability-modules span,
.strategy-grid span,
.principles strong,
.capability-list span {
  display: block;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
}

.capability-modules h3 {
  margin-top: 12px;
}

.business-entry-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 16px;
}

.business-entry-grid a {
  display: grid;
  align-content: start;
  min-height: 136px;
  padding: 24px;
}

.business-entry-grid a:hover {
  border-color: var(--primary-border);
  background: var(--primary-soft);
}

.business-entry-grid strong {
  font-size: 18px;
  font-weight: 800;
}

.business-entry-grid span {
  margin-top: 12px;
}

.strategy-strip {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.strategy-panel {
  display: grid;
  gap: 16px;
  margin-top: 32px;
  padding: 24px;
}

.strategy-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.strategy-grid article {
  padding: 24px;
  background: var(--paper);
}

.strategy-grid span {
  font-size: 18px;
}

.strategy-grid h3 {
  margin-top: 12px;
}

.strategy-path {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.strategy-path span {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}

.split-layout,
.media-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  gap: 24px;
  align-items: start;
}

.media-layout {
  grid-template-columns: minmax(360px, 0.92fr) minmax(0, 1fr);
  align-items: center;
}

.media-layout.reverse {
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.92fr);
}

.product-hero-intro {
  max-width: 920px;
  margin-bottom: 24px;
}

.product-hero-intro .section-heading,
.product-hero-media {
  width: 100%;
  max-width: none;
  margin-right: 0;
  margin-left: 0;
}

.product-hero-media .section-media {
  height: 360px;
}

.split-copy {
  max-width: 760px;
}

.principles {
  display: grid;
  gap: 16px;
}

.value-statement {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 24px;
  margin-top: 32px;
  padding: 32px;
  background: var(--white);
}

.value-statement-main {
  display: grid;
  align-content: center;
}

.value-statement-main span,
.value-statement-side strong {
  display: inline-block;
  width: fit-content;
  min-height: auto;
  padding: 0 0 0 12px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
  border: 0;
  border-left: 3px solid var(--primary);
  border-radius: 0;
  background: transparent;
}

.value-statement-main span {
  font-size: 18px;
}

.value-statement-main h2 {
  max-width: 680px;
  margin-top: 16px;
  font-size: 36px;
  line-height: 1.22;
}

.value-statement-main p {
  max-width: 640px;
  margin-top: 24px;
  font-size: 16px;
}

.value-statement-side {
  display: grid;
  gap: 16px;
}

.value-statement-side article {
  padding: 24px;
}

.value-statement-side h3 {
  margin-top: 12px;
}

.principles span {
  display: block;
  margin-top: 8px;
  font-size: 16px;
  font-weight: 700;
}

.principles p {
  margin-top: 12px;
}

.text-list-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
}

.text-list-grid.compact-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 0;
}

.product-showcase-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 24px;
}

.product-scene-list {
  margin-top: 24px;
}

.product-scene-group {
  grid-template-columns: minmax(220px, 0.35fr) minmax(0, 1fr);
  gap: 24px;
  padding: 24px;
  align-items: start;
}

.product-scene-heading {
  position: sticky;
  top: 96px;
}

.product-scene-heading span {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
}

.product-scene-heading h3 {
  margin-top: 12px;
}

.scene-products {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 0;
}

.product-card {
  overflow: hidden;
  min-height: 100%;
}

.product-card:hover {
  border-color: var(--primary-border);
  background: var(--primary-soft);
}

.product-card-media {
  display: flex;
  aspect-ratio: 1 / 1;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.product-card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.product-card-body {
  display: grid;
  min-height: 232px;
  align-content: start;
  padding: 16px;
}

.product-card-body span {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
}

.product-card-body h3 {
  margin-top: 8px;
  font-size: 22px;
  line-height: 1.2;
}

.product-card-body .product-name {
  margin-top: 8px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 800;
}

.product-card-body strong {
  margin-top: 16px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
}

.content-block {
  margin-top: 32px;
}

.content-block .section-heading {
  margin-bottom: 8px;
}

.timeline-list {
  position: relative;
  margin-top: 24px;
  gap: 0;
  padding-left: 24px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 3px;
  width: 1px;
  background: var(--line);
}

.timeline-list article {
  position: relative;
  display: grid;
  align-content: start;
  padding: 0 0 24px 24px;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.timeline-list article::before {
  content: "";
  position: absolute;
  top: 4px;
  left: -25px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--primary);
  border-radius: 50%;
  background: var(--white);
}

.timeline-list span {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
}

.timeline-list h3 {
  margin-top: 8px;
}

.section-media {
  height: 400px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
}

.section-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

body[data-page="about"] .page-hero {
  min-height: auto;
  align-content: start;
  padding-top: 64px;
  padding-bottom: 72px;
}

body[data-page="about"] .section-heading:not(.compact) {
  max-width: 920px;
  margin-bottom: 28px;
}

body[data-page="about"] .section-heading:not(.compact) h1 {
  font-size: 42px;
  line-height: 1.14;
}

body[data-page="about"] .section-heading:not(.compact) p {
  max-width: 720px;
  font-size: 17px;
}

.about-overview {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: 0;
  margin-top: 32px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.about-intro-panel {
  display: grid;
  align-content: center;
  gap: 22px;
  min-height: 360px;
  padding: 40px;
  background: var(--paper);
}

.about-intro-panel p {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

.about-intro-panel p:first-child {
  color: var(--ink);
  font-size: 22px;
  line-height: 1.6;
}

.foundation-block {
  display: grid;
  gap: 14px;
  max-width: 660px;
  margin-top: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.foundation-block span {
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
}

.foundation-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.foundation-grid strong {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgb(255 255 255 / 0.58);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}

.about-system-panel {
  align-items: stretch;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.about-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 0;
  border: 0;
}

.principle-item {
  padding: 24px 32px;
  border-top: 1px solid var(--line);
  border-left: 0;
}

.principle-item:first-child {
  border-top: 0;
}

.principle-label {
  display: block;
  color: var(--primary);
  font-size: 15px;
  font-weight: 800;
}

.principle-main h2 {
  max-width: 560px;
  margin-top: 14px;
  font-size: 27px;
  line-height: 1.22;
}

.principle-item h3 {
  margin-top: 12px;
  font-size: 20px;
  line-height: 1.32;
}

.principle-item p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.68;
}

.about-system-panel .split-copy {
  display: grid;
  align-content: center;
  gap: 18px;
  max-width: none;
}

.about-system-panel .split-copy p {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 16px;
}

.about-system-panel .split-copy p:first-of-type {
  padding-top: 0;
  border-top: 0;
  color: var(--ink);
}

.about-system-panel .section-media {
  height: 320px;
}

.about-capabilities,
.about-architecture,
.about-system,
.about-timeline {
  margin-top: 48px;
}

.about-capability-grid {
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.about-capability-grid article {
  display: grid;
  grid-template-columns: minmax(140px, 0.24fr) minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}

.about-capability-grid h3,
.about-capability-grid p {
  margin: 0;
}

.about-architecture .capability-list {
  overflow: hidden;
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.about-architecture .capability-list article {
  grid-template-columns: 48px minmax(140px, 0.24fr) minmax(0, 1fr);
  padding: 24px;
}

.about-architecture .capability-list article:last-child {
  border-bottom: 0;
}

.about-system-panel {
  grid-template-columns: minmax(340px, 0.9fr) minmax(0, 1fr);
  gap: 32px;
}

.about-system-panel .split-copy h2 {
  margin-bottom: 4px;
}

.about-timeline .timeline-list {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  padding-left: 0;
}

.about-timeline .timeline-list::before,
.about-timeline .timeline-list article::before {
  display: none;
}

.about-timeline .timeline-list article {
  padding: 18px 0 0;
  border-top: 2px solid var(--line);
}

.about-timeline .timeline-list span {
  font-size: 14px;
}

.about-timeline .timeline-list h3 {
  margin-top: 12px;
  font-size: 18px;
}

.scenario-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.scenario-grid a {
  display: flex;
  min-height: 72px;
  align-items: center;
  padding: 16px;
  font-size: 16px;
  font-weight: 800;
}

.scenario-grid a:hover,
.scenario-grid a:focus-visible {
  color: var(--primary);
  border-color: var(--primary-border);
  background: var(--primary-soft);
  outline: none;
}

.note-block {
  margin-top: 24px;
}

.link-panel {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 16px;
}

.link-panel a {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}

.link-panel a:hover {
  border-color: var(--primary-border);
  background: var(--primary-soft);
}

.capability-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.capability-list article {
  display: grid;
  grid-template-columns: 48px minmax(180px, 0.32fr) minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.capability-list p {
  margin-top: 0;
}

.contact-float {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 25;
  display: grid;
  justify-items: end;
  gap: 8px;
}

.contact-toggle {
  min-height: 40px;
  padding: 0 16px;
  color: var(--primary);
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  border: 1px solid var(--primary-border);
  border-radius: 6px;
  background: var(--white);
  cursor: pointer;
}

.contact-toggle:hover,
.contact-toggle[aria-expanded="true"] {
  background: var(--primary-soft);
}

.contact-menu {
  display: grid;
  width: min(280px, calc(100vw - 48px));
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.contact-float.open .contact-menu {
  opacity: 1;
  pointer-events: auto;
}

.contact-menu a {
  display: flex;
  min-height: 40px;
  align-items: center;
  padding: 0 12px;
  color: var(--ink);
  border-radius: 6px;
  font-size: 14px;
}

.contact-menu a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.site-footer {
  display: grid;
  gap: 24px;
  padding: 32px max(24px, calc((100vw - var(--container)) / 2)) 24px;
  color: var(--muted);
  background: var(--white);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.36fr) minmax(0, 1fr);
  gap: 32px;
}

.footer-brand strong {
  display: block;
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
}

.footer-brand p {
  max-width: 280px;
  color: var(--muted);
  font-size: 14px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.footer-nav div {
  display: grid;
  align-content: start;
  gap: 8px;
}

.footer-nav h3 {
  margin-bottom: 4px;
  color: var(--ink);
  font-size: 14px;
}

.footer-nav a {
  color: var(--muted);
  font-size: 14px;
}

.footer-nav a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  color: var(--subtle);
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.footer-bottom a {
  color: inherit;
  font: inherit;
  font-weight: 600;
  white-space: nowrap;
}

.footer-bottom a:hover {
  color: var(--primary);
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.hero-content,
.section-heading,
.capability-modules,
.business-entry-grid,
.strategy-strip,
.strategy-panel,
.strategy-grid,
.strategy-path,
.product-scene-list,
.product-scene-group,
.split-layout,
.text-list-grid,
.product-showcase-grid,
.timeline-list,
.value-statement,
.media-layout,
.capability-list,
.note-block,
.link-panel {
  animation: fade-in 0.3s ease both;
}

@media (max-width: 1040px) {
  .site-header-inner {
    gap: 16px;
  }

  .nav {
    gap: 14px;
    font-size: 13px;
  }

  .capability-modules,
  .business-entry-grid,
  .strategy-grid,
  .scene-products,
  .product-showcase-grid,
  .text-list-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-scene-group {
    grid-template-columns: 1fr;
  }

  .product-scene-heading {
    position: static;
  }

  .value-statement {
    grid-template-columns: 1fr;
  }

  .split-layout,
  .media-layout,
  .media-layout.reverse {
    grid-template-columns: 1fr;
  }

  .section-media {
    height: 360px;
  }

  .capability-list article {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .capability-list p {
    grid-column: 2;
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 64px;
    padding: 16px;
  }

  .page-main {
    padding-top: 64px;
  }

  .page-hero {
    min-height: auto;
  }

  .site-header-inner {
    position: relative;
    grid-template-columns: auto 1fr;
  }

  .nav {
    position: absolute;
    top: calc(100% + 16px);
    right: 0;
    left: 0;
    display: grid;
    gap: 2px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--white);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease;
  }

  .site-header.menu-open .nav {
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    display: flex;
    min-height: 44px;
    align-items: center;
    padding: 0 12px;
    color: var(--ink);
    border-radius: 6px;
    font-size: 15px;
    font-weight: 700;
  }

  .nav a:hover {
    background: var(--primary-soft);
  }

  .brand img {
    width: 128px;
  }

  .header-tools {
    justify-content: flex-end;
    gap: 8px;
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .language-switcher button {
    min-width: 32px;
    min-height: 30px;
  }

  .hero {
    min-height: 640px;
    padding: 104px 16px 24px;
  }

  .hero-content {
    padding-bottom: 56px;
  }

  h2 {
    font-size: 30px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 26px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .section {
    padding: 64px 16px;
  }

  .capability-modules,
  .business-entry-grid,
  .strategy-strip,
  .strategy-grid,
  .strategy-path,
  .text-list-grid,
  .text-list-grid.compact-list,
  .product-showcase-grid,
  .scene-products,
  .scenario-grid,
  .link-panel {
    grid-template-columns: 1fr;
  }

  .value-statement {
    padding: 24px;
  }

  .value-statement-main h2 {
    font-size: 30px;
  }

  .section-media {
    height: 320px;
  }

  .capability-list article {
    grid-template-columns: 40px 1fr;
  }

  .site-footer {
    padding: 24px 16px;
  }

  .footer-inner,
  .footer-nav,
  .footer-bottom {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .contact-float {
    right: 16px;
    bottom: 16px;
  }
}

@media (max-width: 420px) {
  .brand img {
    width: 112px;
  }

  .hero h1,
  h2 {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 23px;
  }
}

@media (max-width: 1040px) {
  .about-overview {
    grid-template-columns: 1fr;
  }

  .about-intro-panel {
    min-height: auto;
  }

  .about-values {
    border-top: 1px solid var(--line);
  }

  .about-system-panel {
    grid-template-columns: 1fr;
  }

  .about-timeline .timeline-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  body[data-page="about"] .page-hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  body[data-page="about"] .section-heading:not(.compact) h1 {
    font-size: 34px;
  }

  .about-overview {
    margin-top: 24px;
  }

  .about-intro-panel {
    padding: 24px;
  }

  .about-intro-panel p {
    font-size: 16px;
  }

  .about-intro-panel p:first-child {
    font-size: 18px;
  }

  .foundation-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-system-panel {
    padding: 16px;
  }

  .principle-item {
    padding: 24px;
  }

  .principle-main h2 {
    font-size: 25px;
  }

  .about-capability-grid article,
  .about-architecture .capability-list article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .about-architecture .capability-list article span {
    margin-bottom: 4px;
  }

  .about-timeline .timeline-list {
    grid-template-columns: 1fr;
  }
}