:root {
  --navy: #161616;
  --navy-2: #0049ed;
  --text: #161616;
  --muted: #646760;
  --line: #dce6ee;
  --line-strong: #c6d5e5;
  --surface: #eff8ff;
  --tint: #eaf5ff;
  --teal: #0080ff;
  --teal-ink: #0049ed;
  --teal-on-dark: #b8dcff;
  --white: #ffffff;
  --header-height: 72px;
  --section-space: clamp(80px, 9vw, 128px);
  --font: Pretendard, "Pretendard Variable", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", "Segoe UI", sans-serif;
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.75;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--teal-ink);
  outline-offset: 3px;
}

section[tabindex="-1"]:focus,
main[tabindex="-1"]:focus {
  outline: none;
}

::selection {
  color: var(--white);
  background: var(--teal-ink);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: 6px;
  color: var(--white);
  background: var(--navy);
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(1160px, calc(100% - 64px));
  margin-inline: auto;
}

/* Typography */

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 28px;
  color: var(--navy);
  font-size: clamp(2.5rem, 1.6rem + 3.4vw, 4.25rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.03em;
}

h2 {
  margin-bottom: 20px;
  color: var(--navy);
  font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.625rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.025em;
}

h3 {
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 1.1875rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.015em;
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--teal-ink);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.04em;
}

.section-text,
.section-heading > p {
  max-width: 38em;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.0625rem;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
}

.header-inner {
  width: min(1200px, calc(100% - 48px));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  padding: 6px 0;
  border-radius: 4px;
}

.brand img {
  width: 152px;
  height: auto;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
}

.primary-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
}

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

.primary-nav a.is-active {
  color: var(--navy);
  box-shadow: inset 0 -2px 0 var(--teal);
  border-radius: 0;
}

.primary-nav .nav-cta {
  margin-left: 12px;
  padding-inline: 16px;
  border-radius: 6px;
  color: var(--white);
  background: var(--navy);
  font-weight: 700;
}

.primary-nav .nav-cta:hover,
.primary-nav .nav-cta.is-active {
  color: var(--white);
  background: var(--teal-ink);
  box-shadow: none;
  border-radius: 6px;
}

.nav-toggle {
  width: 44px;
  height: 44px;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--navy);
  background: var(--white);
  cursor: pointer;
}

.toggle-line {
  width: 20px;
  height: 2px;
  display: block;
  border-radius: 2px;
  background: currentColor;
  transition: transform 160ms ease, opacity 160ms ease;
}

.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(2) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(3) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(4) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Buttons */

.cta-row,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cta-row {
  margin-top: 40px;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.button-primary {
  color: var(--white);
  background: var(--teal-ink);
}

.button-primary:hover {
  background: var(--teal-ink);
}

.button-secondary {
  color: var(--navy);
  border-color: var(--line-strong);
  background: var(--white);
}

.button-secondary:hover {
  border-color: var(--teal-ink);
  color: var(--teal-ink);
}

/* Sections */

.section {
  padding: var(--section-space) 0;
}

.split-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  align-items: end;
  gap: 32px 72px;
  margin-bottom: 56px;
}

.split-intro h2 {
  margin-bottom: 0;
}

.section-heading {
  max-width: 800px;
  margin-bottom: 56px;
}

/* Hero */

.hero {
  padding: clamp(56px, 8vw, 112px) 0 clamp(64px, 8vw, 120px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: 56px;
}

.hero-copy {
  max-width: 620px;
}

.lead {
  margin-bottom: 20px;
  color: var(--text);
  font-size: clamp(1.125rem, 1rem + 0.4vw, 1.3125rem);
  font-weight: 500;
  line-height: 1.7;
  letter-spacing: -0.01em;
}

.hero-sub {
  margin-bottom: 0;
  color: var(--muted);
}

.hero-visual {
  min-width: 0;
}

.hero-diagram {
  width: 100%;
  height: auto;
}

.flow-compact {
  display: none;
}

/* Compact hero flow (mobile). Mirrors every label in the SVG diagram. */

.flow-compact {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  flex-direction: column;
  align-items: stretch;
}

.flow-stage {
  display: grid;
  gap: 10px;
}

.flow-sources {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  list-style: none;
}

.flow-sources li {
  padding: 10px 12px 10px 14px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--teal);
  border-radius: 6px;
  color: var(--navy);
  background: var(--white);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.35;
}

.flow-node {
  display: grid;
  gap: 2px;
  padding: 12px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--white);
  text-align: center;
}

.flow-node strong {
  color: var(--navy);
  font-size: 1rem;
  line-height: 1.35;
}

.flow-node span {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.4;
}

.flow-core {
  border-color: var(--navy);
  background: var(--navy);
}

.flow-core strong {
  color: var(--white);
  font-size: 1.0625rem;
}

.flow-core span {
  color: rgba(255, 255, 255, 0.78);
}

.flow-human {
  border: 2px solid var(--teal);
}

.flow-arrow {
  position: relative;
  height: 28px;
  display: block;
}

.flow-arrow::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 8px;
  left: 50%;
  width: 2px;
  background: var(--teal);
  transform: translateX(-50%);
}

.flow-arrow::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--teal);
  border-bottom: 2px solid var(--teal);
  transform: translateX(-50%) rotate(45deg);
}

.flow-feedback {
  margin: 12px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
  color: var(--teal-ink);
  font-size: 0.875rem;
  font-weight: 700;
}

.flow-feedback::before {
  content: "\21BA";
  font-size: 1.1rem;
  line-height: 1;
}

/* Company Origin */

.section-origin {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-origin .split-intro {
  align-items: end;
}

.origin-status {
  margin: 20px 0 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 600;
}

.origin-status::before {
  content: "";
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  border: 2px solid var(--teal);
  border-radius: 50%;
}

.origin-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1.05fr);
  align-items: center;
  gap: 20px;
}

.origin-node {
  min-width: 0;
  height: 128px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px 32px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
}

.origin-node img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 44px;
  object-fit: contain;
}

.origin-result {
  border-color: var(--teal);
}

.origin-result img {
  max-height: 64px;
}

.origin-plus {
  color: var(--teal-ink);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1;
}

.origin-arrow {
  position: relative;
  width: 36px;
  height: 14px;
  display: block;
}

.origin-arrow::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 4px;
  height: 2px;
  background: var(--teal);
  transform: translateY(-50%);
}

.origin-arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 1px;
  width: 9px;
  height: 9px;
  border-top: 2px solid var(--teal);
  border-right: 2px solid var(--teal);
  transform: translateY(-50%) rotate(45deg);
}

/* Problem: editorial rows */

.problem-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: start;
  gap: 72px;
}

.problem-intro {
  position: sticky;
  top: calc(var(--header-height) + 40px);
}

.problem-intro h2 {
  margin-bottom: 24px;
}

.problem-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--navy);
}

.problem-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 28px 0 30px;
  border-bottom: 1px solid var(--line-strong);
}

.problem-index {
  grid-row: span 2;
  padding-top: 3px;
  color: var(--teal-ink);
  font-size: 0.9375rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.problem-item h3 {
  margin-bottom: 6px;
  font-size: 1.25rem;
}

.problem-item p {
  margin-bottom: 0;
  color: var(--muted);
}

/* Business */

.section-business {
  background: var(--surface);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.business-card {
  display: flex;
  flex-direction: column;
  padding: 36px 36px 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
}

.card-index {
  margin-bottom: 40px;
  color: var(--teal-ink);
  font-size: 0.9375rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.business-card h3 {
  margin-bottom: 12px;
  font-size: clamp(1.25rem, 1.1rem + 0.4vw, 1.4375rem);
  line-height: 1.38;
}

.business-card p {
  max-width: 34em;
  margin-bottom: 0;
  color: var(--muted);
}

/* How It Works */

.dark-section {
  color: rgba(255, 255, 255, 0.8);
  background: var(--teal-ink);
}

.dark-section h2,
.dark-section h3,
.dark-section strong {
  color: var(--white);
}

.dark-section .section-kicker {
  color: var(--teal-on-dark);
}

.dark-section .section-heading > p {
  color: rgba(255, 255, 255, 0.76);
}

.dark-section :focus-visible {
  outline-color: var(--teal-on-dark);
}

.process-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  padding-left: 0;
  list-style: none;
  counter-reset: process;
}

.process-flow li {
  position: relative;
  padding: 0 24px 0 0;
  counter-increment: process;
}

.process-flow li::before {
  content: counter(process, decimal-leading-zero);
  position: relative;
  z-index: 1;
  width: 44px;
  height: 44px;
  margin-bottom: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.86);
  background: var(--teal-ink);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.process-flow li::after {
  content: "";
  position: absolute;
  top: 22px;
  left: 44px;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.24);
}

.process-flow li:last-child::after {
  display: none;
}

.process-flow strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.process-flow p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.9688rem;
  line-height: 1.7;
}

.process-flow .human-step::before {
  border-color: var(--teal-on-dark);
  color: var(--navy);
  background: var(--teal-on-dark);
}

/* Applications */

.application-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 72px;
}

.list-caption {
  margin-bottom: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--navy);
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0;
}

.area-list {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 32px;
  list-style: none;
}

.area-list li {
  position: relative;
  padding: 16px 0 16px 20px;
  border-bottom: 1px solid var(--line);
  color: var(--navy);
  font-weight: 600;
  line-height: 1.5;
  cursor: default;
}

.area-list li::before {
  content: "";
  position: absolute;
  top: calc(16px + 0.75em - 3px);
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--teal);
}

.commercial-flow {
  position: relative;
  margin: 0;
  padding: 8px 0 0;
  display: grid;
  gap: 0;
  counter-reset: commercial;
  list-style: none;
}

.commercial-flow li {
  position: relative;
  min-height: 60px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 8px 0 20px;
  color: var(--navy);
  font-weight: 700;
  line-height: 1.5;
  counter-increment: commercial;
}

.commercial-flow li::before {
  content: counter(commercial);
  position: relative;
  z-index: 1;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  margin-top: -3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--teal);
  border-radius: 50%;
  color: var(--teal-ink);
  background: var(--white);
  font-size: 0.8125rem;
  font-weight: 700;
}

.commercial-flow li::after {
  content: "";
  position: absolute;
  top: 35px;
  bottom: 0;
  left: 14.5px;
  width: 1px;
  background: var(--line-strong);
}

.commercial-flow li:last-child::after {
  display: none;
}

.commercial-flow li.is-direction::before {
  border-style: dashed;
}

.commercial-flow li.is-direction {
  color: var(--muted);
}

/* Trust: lead principle + supporting principles */

.section-trust {
  background: var(--surface);
}

.trust-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr);
  gap: 56px;
  align-items: start;
}

.trust-lead {
  padding: 40px 36px;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.8);
  background: var(--navy-2);
}

.trust-lead h3 {
  margin-bottom: 16px;
  color: var(--white);
  font-size: clamp(1.5rem, 1.2rem + 0.8vw, 1.875rem);
  line-height: 1.32;
  letter-spacing: -0.025em;
}

.trust-lead p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.8);
}

.trust-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px 40px;
}

.trust-list article {
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
}

.trust-list h3 {
  margin-bottom: 8px;
}

.trust-list p {
  margin-bottom: 0;
  color: var(--muted);
}

/* Partners */

.partner-grid {
  margin-top: 0;
  margin-bottom: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
}

.partner-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.logo-frame {
  height: 132px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 36px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
}

.logo-frame img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 44px;
  object-fit: contain;
}

.partner-card h3 {
  margin: 0;
  padding: 0;
  color: var(--text);
  font-size: 1.375rem;
  font-weight: 750;
  text-align: center;
  line-height: 1.4;
}

.origin-node.origin-contribution {
  height: auto;
  min-height: 284px;
  flex-direction: column;
  gap: 24px;
  padding: 28px 24px;
  align-self: stretch;
}

.origin-role {
  text-align: center;
  width: 100%;
}

.origin-role p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.origin-role .origin-role-title {
  margin-bottom: 12px;
  color: var(--teal-ink);
  font-size: 1.0625rem;
  font-weight: 700;
}

/* Contact: one cluster */

.contact-section {
  background: var(--tint);
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--white);
}

.contact-intro {
  padding: clamp(32px, 4vw, 56px);
}

.contact-intro > p {
  max-width: 36em;
  color: var(--muted);
}

.contact-note {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.contact-note h3 {
  margin-bottom: 12px;
  font-size: 1rem;
  line-height: 1.55;
}

.contact-note ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.contact-note li + li {
  margin-top: 6px;
}

.contact-note li::marker {
  color: var(--teal);
}

.contact-details {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(32px, 4vw, 56px);
  border-left: 1px solid var(--line);
  background: var(--surface);
}

.contact-list {
  margin: 0 0 32px;
}

.contact-list > div {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.contact-list > div:first-child {
  border-top: 1px solid var(--line);
}

.contact-list dt {
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 600;
}

.contact-list dd {
  min-width: 0;
  margin: 0;
  color: var(--navy);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.contact-list dd a {
  color: var(--teal-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.contact-list dd a:hover {
  color: var(--navy);
}

.contact-actions .button {
  flex: 1 1 160px;
}

.copy-status {
  min-height: 24px;
  margin: 14px 0 0;
  color: var(--teal-ink);
  font-size: 0.9375rem;
  font-weight: 700;
}

/* Footer */

.site-footer {
  padding: 56px 0;
  color: rgba(255, 255, 255, 0.78);
  background: var(--navy);
  font-size: 0.9375rem;
}

.site-footer :focus-visible {
  outline-color: var(--teal-on-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: end;
  gap: 32px;
}

.footer-logo {
  width: 176px;
  height: auto;
  margin-bottom: 18px;
}

.site-footer p {
  margin-bottom: 6px;
}

.site-footer a:hover {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-meta {
  text-align: right;
}

/* Responsive */

@media (max-width: 1140px) {
  .primary-nav a {
    padding-inline: 9px;
    font-size: 0.9063rem;
  }

  .primary-nav .nav-cta {
    margin-left: 8px;
    padding-inline: 14px;
  }

  .brand img {
    width: 140px;
  }
}

@media (max-width: 1040px) {
  .process-flow {
    grid-template-columns: 1fr;
    gap: 0;
    max-width: 640px;
  }

  .process-flow li {
    padding: 0 0 32px 72px;
  }

  .process-flow li:last-child {
    padding-bottom: 0;
  }

  .process-flow li::before {
    position: absolute;
    top: -8px;
    left: 0;
    margin: 0;
  }

  .process-flow li::after {
    top: 36px;
    bottom: 0;
    left: 22px;
    right: auto;
    width: 1px;
    height: auto;
  }

  .trust-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .origin-node {
    padding: 24px;
  }
}

@media (max-width: 960px) {
  :root {
    --header-height: 64px;
  }

  .header-inner {
    width: calc(100% - 32px);
  }

  .brand img {
    width: 132px;
  }

  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-height));
    max-height: calc(100dvh - var(--header-height));
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 16px 20px;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    border-bottom: 1px solid var(--line-strong);
    background: var(--white);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 160ms ease, transform 160ms ease, visibility 0s linear 160ms;
  }

  .primary-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 160ms ease, transform 160ms ease, visibility 0s;
  }

  .primary-nav a {
    min-height: 48px;
    flex: 0 0 auto;
    justify-content: flex-start;
    padding: 12px;
    font-size: 1rem;
  }

  .primary-nav a.is-active {
    border-radius: 6px;
    box-shadow: inset 3px 0 0 var(--teal);
    background: var(--surface);
  }

  .primary-nav .nav-cta {
    margin: 10px 0 0;
    justify-content: center;
  }

  .hero-grid,
  .split-intro,
  .problem-layout,
  .application-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 48px;
  }

  .hero-copy {
    max-width: 680px;
  }

  .hero-visual {
    max-width: 600px;
  }

  .split-intro {
    align-items: start;
    gap: 20px;
    margin-bottom: 44px;
  }

  .problem-layout {
    gap: 40px;
  }

  .problem-intro {
    position: static;
  }

  .application-layout {
    gap: 48px;
  }

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

  .contact-details {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .footer-meta {
    text-align: left;
  }

  .origin-diagram {
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    row-gap: 16px;
  }

  .origin-arrow {
    grid-column: 1 / -1;
    justify-self: center;
    transform: rotate(90deg);
  }

  .origin-result {
    grid-column: 1 / -1;
    justify-self: center;
    width: min(100%, 360px);
  }
}

@media (max-width: 760px) {
  .hero-diagram {
    display: block;
  }

  .flow-compact {
    display: none;
  }

  .business-grid {
    grid-template-columns: 1fr;
  }

  .partner-grid {
    grid-template-columns: 1fr;
  }

  .logo-frame {
    height: 112px;
  }

  .trust-list {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

@media (max-width: 560px) {
  body {
    font-size: 1rem;
    line-height: 1.72;
  }

  .container {
    width: calc(100% - 40px);
  }

  .section {
    padding: 72px 0;
  }

  .section-heading {
    margin-bottom: 40px;
  }

  h1 {
    font-size: clamp(2.125rem, 1.2rem + 5vw, 2.625rem);
  }

  .cta-row {
    margin-top: 32px;
  }

  .cta-row,
  .contact-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .contact-actions .button {
    flex: 0 0 auto;
  }

  .origin-diagram {
    grid-template-columns: 1fr;
    justify-items: stretch;
  }

  .origin-node {
    height: 104px;
  }

  .origin-plus {
    justify-self: center;
  }

  .origin-result {
    width: 100%;
  }

  .problem-item {
    grid-template-columns: 1fr;
    padding: 24px 0;
  }

  .problem-index {
    grid-row: auto;
    padding-top: 0;
  }

  .business-card {
    padding: 28px 24px 30px;
  }

  .card-index {
    margin-bottom: 24px;
  }

  .process-flow li {
    padding-left: 64px;
  }

  .trust-lead {
    padding: 32px 24px;
  }

  .contact-intro,
  .contact-details {
    padding: 28px 22px;
  }

  .contact-list > div {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 12px;
  }

  .flow-compact {
    padding: 16px;
  }
}

@media (max-height: 480px) and (orientation: landscape) {
  .primary-nav a {
    min-height: 44px;
    padding-block: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* P.AI official lockup: preserve 476:200 ratio and caption legibility. */
.alliance-frame{padding:24px 36px}
.logo-frame img.alliance-logo{max-height:76px;max-width:100%;width:auto;height:auto}
@media(max-width:760px){.logo-frame img.alliance-logo{max-height:64px}}

.footer-addresses{margin-top:32px;padding-top:24px;border-top:1px solid rgba(255,255,255,.2);font-style:normal;display:grid;gap:10px}
.footer-addresses p{margin:0;display:grid;grid-template-columns:100px minmax(0,1fr);gap:16px;line-height:1.7}
.footer-addresses strong{color:#ffffff;font-weight:650}
@media(max-width:560px){.footer-addresses p{grid-template-columns:1fr;gap:2px}.footer-addresses{gap:18px}}