:root {
  color-scheme: light;
  --ink: #14202b;
  --muted: #5d6b76;
  --line: #d8e0e5;
  --paper: #f7faf9;
  --surface: #ffffff;
  --teal: #0c8f8f;
  --green: #3b8f64;
  --blue: #2f6eb3;
  --coral: #d8624d;
  --gold: #b58b37;
  --shadow: 0 22px 70px rgba(32, 53, 68, 0.16);
  --max: 1140px;
  --radius: 8px;
  font-family: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
}

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

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

button,
input,
select {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 22px;
  padding: 14px max(20px, calc((100vw - var(--max)) / 2));
  background: rgba(247, 250, 249, 0.82);
  border-bottom: 1px solid rgba(216, 224, 229, 0.76);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #14202b;
  color: #fff;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.desktop-nav {
  display: flex;
  justify-content: center;
  gap: 22px;
  color: #314351;
  font-size: 14px;
}

.desktop-nav a,
.mobile-nav a {
  transition: color 160ms ease;
}

.desktop-nav a:hover,
.mobile-nav a:hover,
.text-link:hover {
  color: var(--teal);
}

.header-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid #14202b;
  border-radius: 8px;
  color: #14202b;
  font-weight: 700;
  font-size: 14px;
}

.mobile-menu {
  display: none;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
}

.mobile-menu svg,
.button svg,
.workflow-card svg,
.support-grid svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.mobile-nav {
  position: fixed;
  top: 68px;
  left: 14px;
  right: 14px;
  z-index: 39;
  display: none;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.mobile-nav.is-open {
  display: grid;
}

.mobile-nav a {
  padding: 11px 12px;
  border-radius: 8px;
  color: #263847;
}

.mobile-nav a:hover {
  background: #eef5f2;
}

.hero {
  position: relative;
  min-height: 90svh;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 118px max(20px, calc((100vw - var(--max)) / 2)) 42px;
  background: #dfe9ec;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(247, 250, 249, 0.98) 0%, rgba(247, 250, 249, 0.88) 35%, rgba(247, 250, 249, 0.28) 72%, rgba(247, 250, 249, 0.08) 100%),
    linear-gradient(0deg, rgba(247, 250, 249, 0.78) 0%, rgba(247, 250, 249, 0) 38%);
}

.hero-inner {
  position: relative;
  width: min(720px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(44px, 7vw, 88px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 660px;
  margin: 22px 0 0;
  color: #304351;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 800;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: #14202b;
  color: #fff;
  box-shadow: 0 14px 34px rgba(20, 32, 43, 0.22);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.86);
  color: #14202b;
  border-color: rgba(20, 32, 43, 0.2);
}

.button.wide {
  width: 100%;
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 720px;
  margin: 30px 0 0;
}

.hero-proof div {
  min-height: 92px;
  padding: 13px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(216, 224, 229, 0.82);
  border-radius: 8px;
}

.hero-proof dt {
  font-weight: 900;
}

.hero-proof dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.band,
.offers,
.backend-section,
.diagnosis,
.plans,
.qa {
  padding: 78px max(20px, calc((100vw - var(--max)) / 2));
}

.intro-band {
  background: var(--surface);
}

.section-head {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-head.compact {
  max-width: 680px;
}

.section-head h2,
.diagnosis h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-head p:not(.eyebrow),
.diagnosis p {
  margin: 16px 0 0;
  color: var(--muted);
}

.workflow-grid,
.support-grid,
.plan-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.workflow-card,
.support-grid article,
.plan,
.service-list article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.workflow-card {
  min-height: 232px;
  padding: 20px;
}

.workflow-card svg,
.support-grid svg {
  color: var(--teal);
}

.workflow-card h3,
.support-grid h3,
.service-list h3,
.plan h3 {
  margin: 18px 0 8px;
  font-size: 18px;
  line-height: 1.2;
}

.workflow-card p,
.support-grid p,
.service-list p,
.plan p,
.plan li,
.qa p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.backend-section {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(320px, 0.42fr);
  gap: 44px;
  align-items: end;
  background: #eef5f2;
}

.architecture {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.rail {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  align-items: center;
  min-height: 62px;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.rail span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.rail strong {
  line-height: 1.3;
}

.rail.highlight {
  border-color: rgba(12, 143, 143, 0.55);
  background: #e3f4f0;
}

.backend-copy {
  padding: 24px;
  border-left: 3px solid var(--teal);
  background: rgba(255, 255, 255, 0.68);
}

.backend-copy p {
  margin: 0 0 18px;
  color: #314351;
}

.text-link {
  color: var(--teal);
  font-weight: 900;
}

.service-band {
  background: #fbfcfb;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.service-list article {
  min-height: 228px;
  padding: 22px;
  border-top: 0;
  border-left: 0;
  border-radius: 0;
}

.service-list span {
  color: var(--coral);
  font-size: 13px;
  font-weight: 900;
}

.offer-table {
  display: grid;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface);
}

.offer-table > div {
  display: grid;
  grid-template-columns: 150px 240px 1fr;
  gap: 18px;
  align-items: center;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.offer-table > div:last-child {
  border-bottom: 0;
}

.offer-table span {
  color: var(--teal);
  font-weight: 900;
}

.offer-table em {
  color: var(--muted);
  font-style: normal;
}

.diagnosis {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.5fr);
  gap: 42px;
  align-items: center;
  background: #14202b;
  color: #fff;
}

.diagnosis .eyebrow {
  color: #8bd2c4;
}

.diagnosis p {
  color: #c6d3dc;
}

.lead-form {
  display: grid;
  gap: 14px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

label {
  display: grid;
  gap: 8px;
}

label span {
  color: #dde7ec;
  font-size: 13px;
  font-weight: 800;
}

select {
  width: 100%;
  min-height: 46px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px max(20px, calc((100vw - var(--max)) / 2));
  color: var(--muted);
  font-size: 13px;
  background: #fff;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

.install-hero {
  min-height: 82svh;
  display: grid;
  align-items: end;
  padding: 118px max(20px, calc((100vw - var(--max)) / 2)) 54px;
  background:
    linear-gradient(90deg, rgba(247, 250, 249, 0.98), rgba(247, 250, 249, 0.74)),
    url("/assets/cross-border-ai-ops-hero.png") center / cover;
}

.install-hero-inner {
  max-width: 760px;
}

.install-hero h1 {
  font-size: clamp(40px, 6vw, 74px);
}

.install-hero p:not(.eyebrow) {
  max-width: 650px;
  color: #314351;
  font-size: 18px;
}

.install-band {
  background: #fff;
}

.support-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.support-grid article {
  min-height: 204px;
  padding: 20px;
}

.plans {
  background: #eef5f2;
}

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

.plan {
  min-height: 360px;
  padding: 22px;
}

.plan span {
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
}

.plan.featured {
  border-color: rgba(12, 143, 143, 0.55);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.plan ul {
  display: grid;
  gap: 8px;
  margin: 20px 0 0;
  padding-left: 18px;
}

.qa {
  background: #fff;
}

.qa-list {
  display: grid;
  gap: 10px;
}

details {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

details p {
  margin-top: 12px;
}

@media (max-width: 940px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
  }

  .desktop-nav,
  .header-action {
    display: none;
  }

  .mobile-menu {
    display: grid;
    justify-self: end;
  }

  .hero {
    min-height: 88svh;
    padding-top: 104px;
  }

  .hero-scrim {
    background:
      linear-gradient(90deg, rgba(247, 250, 249, 0.98), rgba(247, 250, 249, 0.78)),
      linear-gradient(0deg, rgba(247, 250, 249, 0.92), rgba(247, 250, 249, 0.18));
  }

  .hero-proof,
  .workflow-grid,
  .support-grid,
  .service-list,
  .plan-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .backend-section,
  .diagnosis {
    grid-template-columns: 1fr;
  }

  .offer-table > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .site-footer {
    display: grid;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 15px;
  }

  .site-header {
    padding: 12px 16px;
  }

  .brand small {
    display: none;
  }

  .hero,
  .install-hero {
    min-height: 86svh;
    padding: 96px 16px 26px;
  }

  .hero-bg {
    object-position: 62% center;
  }

  h1 {
    font-size: 42px;
  }

  .hero-copy,
  .install-hero p:not(.eyebrow) {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .hero-proof,
  .workflow-grid,
  .support-grid,
  .service-list,
  .plan-grid {
    grid-template-columns: 1fr;
  }

  .hero-proof div {
    min-height: auto;
  }

  .band,
  .offers,
  .backend-section,
  .diagnosis,
  .plans,
  .qa {
    padding: 56px 16px;
  }

  .workflow-card,
  .support-grid article,
  .plan {
    min-height: auto;
  }

  .rail {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .backend-copy {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}