:root {
  --brand-primary: #2170e4;
  --brand-primary-strong: #0052d9;
  --brand-primary-deep: #0b3d8c;
  --brand-primary-soft: #5b9cff;
  --brand-primary-bg: #e6f7ff;
  --brand-border: #e8e8e8;
  --ink: #181c1d;
  --ink-secondary: #424754;
  --ink-tertiary: #727785;
  --surface: #f6fafa;
  --surface-low: #f0f4f4;
  --white: #ffffff;
  --success: #00a870;
  --error: #d54941;
  --radius: 8px;
  --radius-btn: 6px;
  --nav-h: 72px;
  --max: 1312px;
  --font: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}

@media (min-width: 1024px) {
  .container {
    width: min(100% - 128px, var(--max));
  }
}

/* ——— Nav ——— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: #fff;
  border-bottom: 1px solid var(--brand-border);
}

.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
  white-space: nowrap;
  color: var(--ink);
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--brand-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 32px;
  font-size: 14px;
  color: var(--ink-secondary);
}

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

.nav-links a[aria-current="page"] {
  color: var(--brand-primary);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-actions .btn {
  padding: 8px 12px;
  min-height: auto;
  font-size: 14px;
  font-weight: 400;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-btn);
  background: var(--white);
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-drawer {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: var(--nav-h);
  background: var(--white);
  border-bottom: 1px solid var(--brand-border);
  padding: 16px 20px 24px;
  flex-direction: column;
  gap: 12px;
}

.nav-drawer.open {
  display: flex;
}

.nav-drawer a {
  padding: 10px 4px;
  color: var(--ink-secondary);
  font-size: 15px;
}

.nav-drawer a[aria-current="page"] {
  color: var(--brand-primary);
  font-weight: 600;
}

.nav-drawer .drawer-actions {
  display: none;
}

@media (min-width: 1024px) {
  .nav-links,
  .nav-actions {
    display: flex;
  }

  .nav-actions {
    gap: 12px;
  }

  .nav-actions .btn {
    padding: 10px 20px;
    min-height: 40px;
  }

  .nav-toggle,
  .nav-drawer {
    display: none !important;
  }
}

/* Mobile header: logo | actions + menu */
@media (max-width: 1023px) {
  .nav {
    gap: 8px;
  }

  .nav-actions {
    margin-left: auto;
  }
}

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--brand-primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--brand-primary-strong);
}

.btn-ghost {
  background: transparent;
  outline: 1px solid var(--brand-border);
  outline-offset: -1px;
  color: var(--ink-secondary);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--brand-primary);
  outline-color: var(--brand-primary);
}

.btn-light {
  background: #fff;
  color: var(--brand-primary);
  border-radius: var(--radius);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  min-height: auto;
}

.btn-light:hover:not(:disabled) {
  background: #f5f9ff;
}

.btn-lg {
  min-height: 48px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
}

/* ——— Shared section bits ——— */
.section {
  padding: 48px 0;
}

@media (min-width: 1024px) {
  .section {
    padding: 80px 0;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-primary);
  margin-bottom: 0;
}

.section-title {
  margin: 0;
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.25;
  font-weight: 700;
  color: var(--ink);
}

.section-desc {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 16px;
  line-height: 26px;
  max-width: 720px;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.section-head.center {
  align-items: center;
  text-align: center;
}

.section-head.center .section-desc {
  max-width: 880px;
}

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

/* ——— Brand hero (prototype) ——— */
.hero-brand {
  background-image: linear-gradient(158.558deg, #5b9cff 14.645%, #2170e4 46.464%, #0b3d8c 85.355%);
  color: #fff;
  padding: 48px 0;
}

@media (min-width: 1024px) {
  .hero-brand {
    background-image: linear-gradient(111.733deg, #5b9cff 14.645%, #2170e4 46.464%, #0b3d8c 85.355%);
    padding: 80px 0;
  }
}

.hero-brand-grid {
  display: grid;
  gap: 28px;
}

@media (min-width: 1024px) {
  .hero-brand-grid {
    grid-template-columns: 520px 1fr;
    gap: 64px;
    align-items: center;
  }
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (min-width: 1024px) {
  .hero-copy {
    gap: 24px;
  }
}

.hero-brand .eyebrow {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 400;
}

.hero-brand h1 {
  margin: 0;
  font-size: 32px;
  line-height: 37px;
  font-weight: 700;
  color: #fff;
}

@media (min-width: 1024px) {
  .hero-brand h1 {
    font-size: clamp(32px, 5vw, 48px);
    line-height: 55px;
  }
}

.hero-brand .lead {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  line-height: 22px;
}

@media (min-width: 1024px) {
  .hero-brand .lead {
    font-size: 16px;
    line-height: 26px;
  }
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  width: 100%;
}

.hero-ctas .btn {
  width: 100%;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  min-height: auto;
}

@media (min-width: 1024px) {
  .hero-ctas {
    gap: 16px;
  }

  .hero-ctas .btn {
    width: auto;
  }
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 24px 32px;
  width: 100%;
}

@media (max-width: 1023px) {
  .hero-stats {
    justify-content: center;
    flex-wrap: nowrap;
    gap: 32px;
  }
}

.hero-stats .stat-value {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.hero-stats .stat-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

.hero-visual {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 1024px) {
  .hero-visual {
    padding: 24px;
  }
}

.hero-visual .preview-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

.metric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

@media (min-width: 1024px) {
  .metric-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }
}

.metric-glass {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric-glass .label {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.7);
}

.metric-glass .value-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.metric-glass .value {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}

.metric-glass .delta-up {
  font-size: 11px;
  color: #7dffb8;
}

.metric-glass .delta-down {
  font-size: 11px;
  color: #ff9a9a;
}

.insight-glass {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.insight-glass strong {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
}

.insight-glass p {
  margin: 0;
  font-size: 12px;
  line-height: 18px;
  color: rgba(255, 255, 255, 0.8);
}

.bar-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 80px;
  margin-top: 4px;
}

.bar-row span {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: #fff;
}

.bar-row span:nth-child(2) {
  background: rgba(255, 255, 255, 0.6);
}

.bar-row span:nth-child(3) {
  background: rgba(255, 255, 255, 0.4);
}

.bar-row span:nth-child(4) {
  background: rgba(255, 255, 255, 0.267);
}

/* ——— Features ——— */
.neutral-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-primary-bg);
  color: var(--brand-primary);
  border-radius: 20px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 600;
}

.neutral-badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.feature-grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 768px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: #fff;
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--brand-primary-bg);
  display: grid;
  place-items: center;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  line-height: 22px;
  color: var(--ink-secondary);
}

/* ——— Steps ——— */
.steps-row {
  display: grid;
  gap: 24px;
}

@media (min-width: 1024px) {
  .steps-row {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }
}

.step-item {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 24px;
  background: var(--brand-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 16px;
  font-weight: 700;
}

.step-item h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.step-item p {
  margin: 0;
  font-size: 14px;
  line-height: 22px;
  color: var(--ink-secondary);
}

/* ——— Dark platforms ——— */
.platforms-dark {
  background: var(--ink);
  padding: 48px 0;
}

@media (min-width: 1024px) {
  .platforms-dark {
    padding: 80px 0;
  }
}

.platforms-dark .eyebrow {
  color: var(--brand-primary-soft);
}

.platforms-dark .section-title {
  color: #fff;
}

.platforms-dark .section-desc {
  color: rgba(255, 255, 255, 0.6);
  max-width: 880px;
}

.platform-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

@media (min-width: 1024px) {
  .platform-row {
    gap: 16px;
    margin-top: 40px;
  }
}

.platform-tile {
  width: calc(33.333% - 7px);
  max-width: 108px;
  height: 108px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px;
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  text-align: center;
}

@media (min-width: 768px) {
  .platform-tile {
    width: 136px;
    max-width: 136px;
    height: 136px;
    padding: 16px;
  }
}

.platform-logo {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: #fff;
  flex-shrink: 0;
}

.platform-logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
}

@media (min-width: 768px) {
  .platform-logo {
    width: 56px;
    height: 56px;
  }

  .platform-logo img {
    width: 48px;
    height: 48px;
  }
}

/* ——— Use cases ——— */
.usecase-grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 768px) {
  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .usecase-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.usecase-card {
  background: #fff;
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.usecase-card .tag {
  align-self: flex-start;
  background: var(--brand-primary-bg);
  color: var(--brand-primary);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
}

.usecase-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.usecase-card p {
  margin: 0;
  font-size: 14px;
  line-height: 22px;
  color: var(--ink-secondary);
}

/* ——— Blue CTA band ——— */
.cta-brand {
  background-image: linear-gradient(180deg, #2170e4 0%, #0b3d8c 100%);
  text-align: center;
  padding: 48px 0;
}

@media (min-width: 1024px) {
  .cta-brand {
    padding: 80px 0;
  }
}

.cta-brand .section-title {
  color: #fff;
  margin-bottom: 16px;
  font-size: 26px;
}

@media (min-width: 1024px) {
  .cta-brand .section-title {
    font-size: clamp(28px, 4vw, 36px);
  }
}

.cta-brand .section-desc {
  margin: 0 auto 20px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 560px;
  font-size: 14px;
  line-height: 22px;
}

@media (min-width: 1024px) {
  .cta-brand .section-desc {
    margin-bottom: 32px;
    font-size: 16px;
    line-height: 26px;
  }
}

.cta-brand .hero-ctas {
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.cta-brand .hero-ctas .btn {
  width: auto;
}

.cta-brand .cta-mail {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  order: -1;
}

@media (min-width: 1024px) {
  .cta-brand .hero-ctas {
    flex-direction: row;
    justify-content: center;
    gap: 16px;
  }

  .cta-brand .cta-mail {
    order: 0;
  }
}

/* ——— Generic cards (other pages) ——— */
.hero {
  background: linear-gradient(180deg, var(--brand-primary-bg) 0%, var(--white) 72%);
}

.hero-grid {
  display: grid;
  gap: 28px;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: center;
  }
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.2;
  font-weight: 700;
}

.hero p.lead {
  margin: 0 0 24px;
  color: var(--ink-secondary);
  font-size: 16px;
  max-width: 560px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat {
  background: var(--white);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 22px;
  color: var(--brand-primary-strong);
}

.stat span {
  font-size: 12px;
  color: var(--ink-tertiary);
}

.preview-card {
  background: var(--white);
  border: 1px solid var(--brand-border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 12px 40px rgba(24, 28, 29, 0.06);
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  border: 1px solid var(--brand-border);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--white);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--ink-secondary);
  font-size: 14px;
}

.card .tag {
  display: inline-block;
  font-size: 11px;
  color: var(--brand-primary);
  background: var(--brand-primary-bg);
  padding: 2px 8px;
  border-radius: 999px;
  margin-bottom: 10px;
  font-weight: 600;
}

.steps {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

@media (min-width: 1024px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step {
  border: 1px solid var(--brand-border);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--surface);
}

.step .num {
  font-size: 16px;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 8px;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.step p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-secondary);
}

.platforms {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 28px;
}

@media (min-width: 768px) {
  .platforms {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .platforms {
    grid-template-columns: repeat(6, 1fr);
  }
}

.platform {
  border: 1px solid var(--brand-border);
  border-radius: var(--radius);
  padding: 18px 12px;
  text-align: center;
  font-weight: 600;
  font-size: 15px;
  background: var(--white);
}

.flow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 20px 0 8px;
  color: var(--ink-tertiary);
  font-size: 13px;
}

.flow span.chip {
  background: var(--surface);
  border: 1px solid var(--brand-border);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--ink-secondary);
}

.code-block {
  margin-top: 20px;
  background: #0f1720;
  color: #e8eef7;
  border-radius: 12px;
  padding: 18px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  line-height: 1.55;
  overflow-x: auto;
  white-space: pre;
}

.muted-note {
  margin-top: 10px;
  font-size: 12px;
  color: var(--ink-tertiary);
}

.cta-band {
  background: linear-gradient(135deg, var(--brand-primary-bg), var(--surface));
  text-align: center;
}

.cta-band .section-desc {
  margin-inline: auto;
}

.cta-band .hero-ctas {
  justify-content: center;
  margin-top: 24px;
  margin-bottom: 0;
}

/* ——— Contact ——— */
.hero-contact {
  background: var(--surface);
  text-align: center;
  padding: 48px 0;
}

@media (min-width: 1024px) {
  .hero-contact {
    padding: 64px 0;
  }
}

.hero-contact .eyebrow {
  color: var(--brand-primary);
  font-weight: 600;
}

.hero-contact h1 {
  margin: 12px 0 16px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

.hero-contact .lead {
  margin: 0 auto;
  max-width: 560px;
  color: var(--ink-secondary);
  font-size: 16px;
  line-height: 26px;
}

.contact-body {
  padding-top: 48px;
  padding-bottom: 64px;
}

@media (min-width: 1024px) {
  .contact-body {
    padding-top: 64px;
    padding-bottom: 80px;
  }
}

.contact-layout {
  display: grid;
  gap: 32px;
}

@media (min-width: 1024px) {
  .contact-layout {
    grid-template-columns: 1fr 400px;
    gap: 48px;
    align-items: start;
  }
}

.form-card {
  border: 1px solid var(--brand-border);
  border-radius: 12px;
  padding: 28px;
  background: var(--white);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

@media (min-width: 1024px) {
  .form-card {
    padding: 32px;
  }
}

.form-card h2,
.contact-info h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}

.field {
  margin: 0;
}

.field label,
.field-label {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-secondary);
  margin-bottom: 8px;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--brand-border);
  border-radius: 6px;
  min-height: 44px;
  padding: 0 14px;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  background: var(--surface);
}

.field textarea {
  min-height: 100px;
  padding: 14px;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--ink-tertiary);
}

.field input:focus,
.field textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--brand-primary) 35%, transparent);
  border-color: var(--brand-primary);
  background: var(--white);
}

.intent-options {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.intent-chip {
  display: inline-flex;
  align-items: center;
  margin: 0;
  cursor: pointer;
}

.intent-chip input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.intent-chip span {
  display: inline-block;
  border: 1px solid var(--brand-border);
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-secondary);
  background: var(--white);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.intent-chip input:checked + span {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: var(--brand-primary-bg);
  font-weight: 500;
}

.intent-chip input:focus-visible + span {
  outline: 2px solid color-mix(in srgb, var(--brand-primary) 35%, transparent);
  outline-offset: 2px;
}

.btn-submit {
  width: 100%;
  justify-content: center;
  border-radius: 8px;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
}

.hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form-status {
  margin: 0;
  font-size: 14px;
}

.form-status.ok {
  color: var(--success);
}

.form-status.err {
  color: var(--error);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.info-block {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.info-block h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.info-block a,
.info-block .line {
  display: block;
  color: var(--brand-primary);
  font-size: 14px;
  font-weight: 400;
}

.info-block p {
  margin: 0;
  font-size: 13px;
  line-height: 20px;
  color: var(--ink-secondary);
}

/* ——— Footer ——— */
.site-footer {
  border-top: 1px solid var(--brand-border);
  padding: 24px 0;
  background: var(--white);
}

.footer-row {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (min-width: 1024px) {
  .footer-row {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-left p {
  margin: 0;
  font-size: 12px;
  color: var(--ink-tertiary);
}

.footer-left a {
  color: inherit;
}

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

.trust-badge {
  display: inline-flex;
  align-items: center;
  margin-top: 4px;
  width: fit-content;
  line-height: 0;
  pointer-events: none;
}

.trust-badge img {
  display: block;
  width: 130px;
  height: auto;
}

.footer-right {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-tertiary);
}

@media (min-width: 1024px) {
  .footer-right {
    align-items: flex-end;
  }
}

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

.psb-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.psb-row img,
.psb-icon {
  width: 16px;
  height: 16px;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

@media (max-width: 1023px) {
  .section-title {
    font-size: 26px;
  }

  .section-desc {
    font-size: 14px;
    line-height: 22px;
  }

  .section-head {
    gap: 12px;
  }

  .surface-section .feature-grid {
    gap: 16px;
  }

  .usecase-grid {
    gap: 16px;
  }

  .footer-left p,
  .footer-right a,
  .footer-right span {
    font-size: 11px;
  }

  .footer-right {
    align-items: flex-end;
    text-align: right;
  }
}

@media (max-width: 640px) {
  .hero-stats {
    gap: 20px;
  }

  .hero-stats .stat-value {
    font-size: 22px;
  }
}

/* ——— Collect API page ——— */
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 400;
  min-height: auto;
  outline: 1px solid rgba(255, 255, 255, 0.4);
  outline-offset: -1px;
}

.btn-outline-light:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
}

.hero-visual-api {
  gap: 16px;
}

.hero-visual-api .preview-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.api-photo {
  border-radius: 10px;
  overflow: hidden;
  width: 100%;
}

.api-photo-img {
  display: block;
  height: 169px;
  width: 100%;
  object-fit: cover;
  object-position: center;
}

.api-photo-caption {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #0b1220;
  padding: 10px 14px;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

.api-photo-caption svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.api-hero-steps {
  display: grid;
  gap: 12px;
}

@media (min-width: 900px) {
  .api-hero-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

.api-hero-step {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 160px;
}

.api-hero-step.is-active {
  background: rgba(255, 255, 255, 0.24);
  border: 1.5px solid #fff;
}

.api-hero-step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.api-hero-step-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: #ffffff33;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.api-hero-step.is-active .api-hero-step-icon {
  background: #fff;
}

.api-hero-step-icon svg {
  width: 18px;
  height: 18px;
}

.api-hero-step-badge {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
}

.api-hero-step.is-active .api-hero-step-badge {
  background: #fff;
  color: var(--brand-primary);
}

.api-hero-step-title {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}

.api-hero-step-title .num {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
}

.api-hero-step.is-active .api-hero-step-title .num {
  color: #fff;
}

.api-hero-step p {
  margin: 0;
  font-size: 12px;
  line-height: 19px;
  color: rgba(255, 255, 255, 0.8);
}

.capability-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.capability-tags span {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 500;
  color: #fff;
}

.usecase-card .tag.tag-soft {
  background: #f1f6ff;
}

.partner-body {
  display: grid;
  gap: 32px;
}

@media (min-width: 1024px) {
  .partner-body {
    grid-template-columns: 1fr 480px;
    gap: 48px;
    align-items: start;
  }
}

.api-flow {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.api-flow > h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.api-flow-step {
  display: flex;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 20px;
}

.api-flow-num {
  width: 40px;
  height: 40px;
  border-radius: 20px;
  background: var(--brand-primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.api-flow-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.api-flow-content .title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
}

.api-flow-content .title-row svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.api-flow-content p {
  margin: 0;
  font-size: 13px;
  line-height: 20px;
  color: var(--ink-secondary);
}

.api-code-panel {
  background: var(--ink);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.api-code-panel .code-title {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
}

.api-code-panel pre {
  margin: 0;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  color: #7dd3fc;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px;
  line-height: 17px;
  white-space: pre;
}

.api-code-panel .code-note {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

.partner-features {
  display: grid;
  gap: 24px;
  margin-top: 48px;
}

@media (min-width: 768px) {
  .partner-features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .partner-features {
    grid-template-columns: repeat(4, 1fr);
  }
}

.partner-feature {
  background: var(--surface);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.partner-feature .icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #f1f6ff;
  display: grid;
  place-items: center;
}

.partner-feature .icon-wrap svg {
  width: 18px;
  height: 18px;
}

.partner-feature h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
}

.partner-feature p {
  margin: 0;
  font-size: 13px;
  line-height: 20px;
  color: var(--ink-secondary);
}

.specs-grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 768px) {
  .specs-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.spec-card {
  background: var(--surface);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.spec-card li,
.spec-card p {
  margin: 0;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 13px;
  color: var(--ink-secondary);
  list-style: none;
}

.spec-card ul {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Collect API — mobile layout (nav unchanged) */
@media (max-width: 1023px) {
  .page-collect-api .hero-brand {
    background-image: linear-gradient(165.92deg, #5b9cff 14.645%, #2170e4 46.464%, #0b3d8c 85.355%);
    padding: 48px 0;
  }

  .page-collect-api .hero-brand-grid {
    gap: 28px;
  }

  .page-collect-api .hero-copy {
    gap: 16px;
    align-items: flex-start;
    text-align: left;
  }

  .page-collect-api .hero-brand h1 {
    font-size: 32px;
    line-height: 37px;
  }

  .page-collect-api .hero-brand .lead {
    font-size: 14px;
    line-height: 22px;
  }

  .page-collect-api .hero-ctas {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    width: 100%;
  }

  .page-collect-api .hero-ctas .btn,
  .page-collect-api .hero-ctas .btn-outline-light {
    width: 100%;
    justify-content: center;
    padding: 14px 28px;
    font-size: 15px;
  }

  .page-collect-api .hero-stats {
    justify-content: center;
    flex-wrap: nowrap;
    gap: 32px;
  }

  .page-collect-api .hero-stats .stat-value {
    font-size: 24px;
  }

  .page-collect-api .hero-visual {
    padding: 16px;
    gap: 16px;
  }

  .page-collect-api .api-photo-img {
    height: 150px;
  }

  .page-collect-api .api-hero-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-collect-api .api-hero-step {
    height: 176px;
    min-height: 176px;
  }

  .page-collect-api .api-hero-step-title {
    font-size: 17px;
  }

  .page-collect-api .capability-tags {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: 8px;
    width: 100%;
  }

  .page-collect-api .section {
    padding: 48px 0;
  }

  .page-collect-api .section-head {
    text-align: left;
    align-items: flex-start;
    gap: 12px;
  }

  .page-collect-api .section-head.center {
    text-align: left;
    align-items: flex-start;
  }

  .page-collect-api .section-title {
    font-size: 26px;
  }

  .page-collect-api .section-desc {
    font-size: 14px;
    line-height: 22px;
  }

  .page-collect-api .usecase-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .page-collect-api .partner-body {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-collect-api .partner-features {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 28px;
  }

  .page-collect-api .specs-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .page-collect-api .cta-brand {
    padding: 48px 0;
  }

  .page-collect-api .cta-brand .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .page-collect-api .cta-brand .section-title {
    font-size: 26px;
    margin-bottom: 0;
  }

  .page-collect-api .cta-brand .section-desc {
    font-size: 14px;
    line-height: 22px;
    margin: 0;
  }

  .page-collect-api .cta-brand .hero-ctas {
    width: 100%;
    gap: 12px;
  }

  .page-collect-api .cta-brand .btn {
    width: 100%;
    max-width: 100%;
  }

  .page-collect-api .api-code-panel {
    padding: 24px;
  }

  .page-collect-api .api-code-panel pre {
    font-size: 11px;
    line-height: 17px;
  }
}

@media (max-width: 640px) {
  .page-collect-api .hero-stats {
    gap: 32px;
  }

  .page-collect-api .hero-stats .stat-value {
    font-size: 24px;
  }
}

/* ——— Scenarios page ——— */
.hero-scenarios {
  background-image: linear-gradient(101.997deg, #5b9cff 14.645%, #2170e4 46.464%, #0b3d8c 85.355%);
  text-align: center;
  padding: 48px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero-scenarios .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

@media (min-width: 1024px) {
  .hero-scenarios {
    padding: 72px 0;
  }
}

.hero-scenarios .eyebrow {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 600;
}

.hero-scenarios h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.2;
}

.hero-scenarios .lead {
  margin: 0 auto;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  line-height: 26px;
}

.section-title-sm {
  font-size: clamp(24px, 3.5vw, 32px);
}

.flow-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 32px;
}

.flow-bar.flow-brand {
  background: var(--brand-primary-bg);
  outline: 1px solid var(--brand-primary);
  outline-offset: -1px;
}

.flow-bar.flow-api {
  background: #f1f6ff;
  outline: 1px solid var(--brand-border);
  outline-offset: -1px;
}

.flow-bar .flow-step {
  background: #fff;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--brand-primary);
}

.flow-bar .flow-arrow {
  color: var(--brand-primary);
  font-size: 14px;
}

.flow-bar.flow-api .flow-arrow {
  color: var(--ink-tertiary);
}

.scenario-grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 900px) {
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.scenario-card {
  background: #fff;
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.scenario-card.on-surface {
  background: var(--surface);
}

.scenario-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.scenario-card-top .icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--brand-primary-bg);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.scenario-card-top .icon-wrap.soft {
  background: #f1f6ff;
}

.scenario-card-top .icon-wrap svg {
  width: 18px;
  height: 18px;
}

.scenario-card-top .tag {
  background: var(--brand-primary-bg);
  color: var(--brand-primary);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
}

.scenario-card-top .tag.tag-soft {
  background: #f1f6ff;
}

.scenario-card h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.scenario-card p {
  margin: 0;
  font-size: 14px;
  line-height: 22px;
  color: var(--ink-secondary);
}

.cta-brand .cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

/* Scenarios — mobile layout (nav unchanged) */
@media (max-width: 1023px) {
  .page-scenarios .hero-scenarios {
    background-image: linear-gradient(123.69deg, #5b9cff 14.645%, #2170e4 46.464%, #0b3d8c 85.355%);
    padding: 48px 0;
    gap: 16px;
  }

  .page-scenarios .hero-scenarios h1 {
    font-size: 32px;
    line-height: 1.15;
  }

  .page-scenarios .hero-scenarios .lead {
    font-size: 14px;
    line-height: 22px;
  }

  .page-scenarios .section {
    padding: 48px 0;
  }

  .page-scenarios .section .container {
    display: flex;
    flex-direction: column;
    gap: 28px;
  }

  .page-scenarios .section-head {
    text-align: left;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 0;
  }

  .page-scenarios .section-title,
  .page-scenarios .section-title-sm {
    font-size: 26px;
  }

  .page-scenarios .section-desc {
    font-size: 14px;
    line-height: 22px;
  }

  .page-scenarios .flow-bar {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    margin-bottom: 0;
    width: 100%;
  }

  .page-scenarios .flow-bar .flow-step {
    width: 100%;
    justify-content: center;
    text-align: center;
    display: flex;
  }

  .page-scenarios .scenario-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .page-scenarios .cta-brand {
    padding: 48px 0;
  }

  .page-scenarios .cta-brand .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .page-scenarios .cta-brand .section-title,
  .page-scenarios .cta-brand .section-title-sm {
    font-size: 26px;
    margin-bottom: 0;
  }

  .page-scenarios .cta-brand .section-desc {
    font-size: 14px;
    line-height: 22px;
    margin: 0;
  }

  .page-scenarios .cta-brand .cta-row {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
  }

  .page-scenarios .cta-brand .cta-row .btn {
    width: fit-content;
    min-width: 160px;
    justify-content: center;
  }
}