:root {
  --bg: #eef5fb;
  --surface: #ffffff;
  --surface-soft: rgba(255, 255, 255, 0.76);
  --ink: #101a2b;
  --muted: #5d6b7f;
  --line: rgba(16, 26, 43, 0.12);
  --blue: #1d74f5;
  --blue-dark: #1554c8;
  --sky: #dff0ff;
  --green: #2aa876;
  --amber: #d98b2b;
  --shadow: 0 18px 54px rgba(31, 79, 143, 0.13);
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 48%, #e7f0f7 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--blue-dark);
}

.shell {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  box-shadow: 0 8px 18px rgba(29, 116, 245, 0.14);
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 720;
}

.locale-switch {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink);
  padding: 7px 10px;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 620px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(223, 240, 255, 0.82)),
    var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -34% 26%;
  height: 62%;
  background: radial-gradient(circle, rgba(29, 116, 245, 0.18), transparent 64%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 620px;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.72fr);
  align-items: center;
  gap: 44px;
  padding: 58px;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  border: 1px solid rgba(29, 116, 245, 0.18);
  border-radius: 999px;
  background: rgba(29, 116, 245, 0.08);
  padding: 0 12px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 820;
}

h1 {
  margin: 18px 0 0;
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.98;
  font-weight: 820;
  letter-spacing: 0;
}

.lead {
  max-width: 640px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 18px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink);
  font-size: 15px;
  font-weight: 780;
}

.button.primary {
  border-color: transparent;
  background: var(--blue);
  color: #fff;
  box-shadow: 0 16px 34px rgba(29, 116, 245, 0.2);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 360px;
}

.hero-visual img {
  width: min(280px, 72vw);
  height: auto;
  border-radius: 32px;
  box-shadow: 0 30px 84px rgba(29, 116, 245, 0.24);
}

.signal-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.signal-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  padding: 16px;
  color: var(--muted);
  font-size: 14px;
}

.signal-list strong {
  display: block;
  color: var(--ink);
  font-size: 16px;
  margin-bottom: 4px;
}

.section {
  padding: 34px 0 0;
}

.section-header {
  max-width: 760px;
  margin-bottom: 18px;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-header p,
.doc-lead {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
}

.card {
  grid-column: span 4;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 32px rgba(31, 79, 143, 0.08);
  padding: 22px;
}

.card.wide {
  grid-column: span 6;
}

.card.full {
  grid-column: span 12;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.25;
}

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

.card p {
  margin: 0;
}

.card ul,
.doc-card ul {
  margin: 0;
  padding-left: 20px;
}

.card li + li,
.doc-card li + li {
  margin-top: 8px;
}

.doc-wrap {
  max-width: 900px;
  padding-bottom: 72px;
}

.doc-hero {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(223, 240, 255, 0.78));
  box-shadow: var(--shadow);
  padding: 40px;
}

.doc-hero h1 {
  font-size: clamp(38px, 6vw, 64px);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.meta-pill {
  border: 1px solid rgba(29, 116, 245, 0.18);
  border-radius: 999px;
  background: rgba(29, 116, 245, 0.08);
  padding: 8px 12px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 760;
}

.doc-card {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 32px rgba(31, 79, 143, 0.08);
  padding: 28px;
}

.doc-card h2 {
  font-size: 26px;
  margin-bottom: 12px;
}

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

.doc-card p {
  margin: 0 0 12px;
}

.contact-box {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  border: 1px solid rgba(29, 116, 245, 0.18);
  border-radius: 6px;
  background: rgba(29, 116, 245, 0.08);
  padding: 0 16px;
  color: var(--blue-dark);
  font-weight: 800;
}

footer {
  padding: 30px 0 44px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 8px;
  font-weight: 720;
}

@media (max-width: 900px) {
  .hero,
  .hero-inner {
    min-height: auto;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding: 34px 24px;
  }

  .hero-visual {
    min-height: 220px;
    justify-content: start;
  }

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

  .card,
  .card.wide {
    grid-column: span 12;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    gap: 12px;
  }

  .hero-inner,
  .doc-hero,
  .doc-card {
    padding: 24px 18px;
  }

  h1 {
    font-size: 42px;
  }

  .lead,
  .section-header p,
  .doc-lead {
    font-size: 16px;
  }
}