:root {
  --ink: #082b4a;
  --ink-2: #113c62;
  --text: #17212b;
  --muted: #5c6b78;
  --line: #dbe5ec;
  --paper: #ffffff;
  --soft: #f4f8fb;
  --cyan: #12a9cf;
  --green: #36d889;
  --amber: #f4863d;
  --shadow: 0 18px 50px rgba(8, 43, 74, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--paper);
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.55;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(219, 229, 236, 0.76);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand img {
  width: 48px;
  height: 48px;
}

.brand strong {
  display: block;
  color: var(--ink);
  font-size: 17px;
  letter-spacing: 0.06em;
}

.brand span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

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

.language {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 700;
}

.hero {
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: center;
  padding: 72px 0 56px;
  background:
    linear-gradient(116deg, rgba(8, 43, 74, 0.96) 0%, rgba(8, 43, 74, 0.92) 49%, rgba(18, 169, 207, 0.18) 100%),
    radial-gradient(circle at 78% 24%, rgba(54, 216, 137, 0.24), transparent 30%),
    #082b4a;
  color: #fff;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 56px;
  align-items: center;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 18px;
  color: #a8ecff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  color: inherit;
  line-height: 1.06;
}

h1 {
  max-width: 720px;
  font-size: clamp(48px, 6vw, 88px);
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 640px;
  margin: 24px 0 0;
  color: #d6e5ee;
  font-size: 20px;
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
}

.button.primary {
  background: var(--green);
  color: #05263d;
}

.button.secondary {
  border-color: rgba(255, 255, 255, 0.26);
  color: #fff;
}

.button.light {
  border-color: var(--line);
  color: var(--ink);
}

.hero-visual {
  position: relative;
  min-height: 420px;
}

.signal-panel {
  position: absolute;
  inset: 0;
  padding: 34px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.25);
}

.signal-panel img {
  width: 150px;
  margin-bottom: 34px;
}

.metric-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: end;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.metric-row:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.metric-row span {
  color: #b9cbd8;
  font-size: 14px;
}

.metric-row strong {
  color: #fff;
  font-size: 32px;
}

.flow-line {
  position: absolute;
  right: 32px;
  bottom: 28px;
  left: 32px;
  height: 72px;
  border-right: 5px solid var(--green);
  border-bottom: 5px solid var(--green);
  border-radius: 0 0 8px 0;
}

.section {
  padding: 88px 0;
}

.section.alt {
  background: var(--soft);
}

.section.dark {
  background: var(--ink);
  color: #fff;
}

.section-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(280px, 0.55fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 42px;
}

.section h2 {
  color: var(--ink);
  font-size: clamp(32px, 4vw, 54px);
}

.section.dark h2 {
  color: #fff;
}

.section-copy {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.section.dark .section-copy {
  color: #c5d6e0;
}

.grid-3,
.grid-2 {
  display: grid;
  gap: 18px;
}

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

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

.tile {
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.tile.dark-tile {
  border-color: rgba(255, 255, 255, 0.13);
  background: rgba(255, 255, 255, 0.06);
}

.tile h3 {
  color: var(--ink);
  font-size: 22px;
}

.section.dark .tile h3 {
  color: #fff;
}

.tile p,
.tile li {
  color: var(--muted);
}

.section.dark .tile p,
.section.dark .tile li {
  color: #c5d6e0;
}

.tile p {
  margin: 16px 0 0;
}

.tile ul {
  margin: 18px 0 0;
  padding-left: 18px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.tag {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.step {
  min-height: 180px;
  padding: 26px;
  border-right: 1px solid var(--line);
}

.step:last-child {
  border-right: 0;
}

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

.step h3 {
  margin-top: 20px;
  color: var(--ink);
  font-size: 21px;
}

.step p {
  margin: 12px 0 0;
  color: var(--muted);
}

.proof {
  display: grid;
  grid-template-columns: 0.78fr 1fr;
  gap: 38px;
  align-items: center;
}

.proof-panel {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.proof-panel img {
  width: 230px;
  margin-bottom: 26px;
}

.stat-list {
  display: grid;
  gap: 12px;
}

.stat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.stat strong {
  color: var(--ink);
}

.stat span {
  color: var(--muted);
}

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 34px;
  align-items: center;
  padding: 40px;
  border-radius: 8px;
  background: #fff;
  color: var(--text);
}

.contact-band h2 {
  color: var(--ink);
}

.site-footer {
  padding: 34px 0;
  background: #061f35;
  color: #b7c9d5;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  gap: 22px;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 18px;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero-inner,
  .section-heading,
  .proof,
  .contact-band {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 360px;
  }

  .grid-3,
  .grid-2,
  .process {
    grid-template-columns: 1fr;
  }

  .step {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .step:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 560px) {
  .nav {
    width: min(100% - 28px, 1120px);
  }

  .brand strong {
    font-size: 14px;
  }

  .brand span {
    display: none;
  }

  .hero,
  .section {
    padding: 56px 0;
  }

  .hero-inner,
  .section-inner {
    width: min(100% - 28px, 1120px);
  }

  h1 {
    font-size: 42px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .signal-panel {
    padding: 24px;
  }

  .contact-band {
    padding: 28px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}