:root {
  --bg: #f4f7fb;
  --bg-soft: #edf3f9;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-solid: #ffffff;
  --line: rgba(110, 133, 165, 0.20);
  --text: #183046;
  --sub: #667a91;
  --blue: #2f6bff;
  --green: #18b28c;
  --blue-soft: rgba(47, 107, 255, 0.10);
  --green-soft: rgba(24, 178, 140, 0.10);
  --shadow: 0 20px 48px rgba(27, 54, 93, 0.10);
  --radius: 24px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at left top, rgba(47, 107, 255, 0.08), transparent 28%),
    radial-gradient(circle at right top, rgba(24, 178, 140, 0.08), transparent 24%),
    linear-gradient(180deg, #f7faff 0%, var(--bg) 50%, var(--bg-soft) 100%);
}

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

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

.container {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 10px 24px rgba(28, 45, 76, 0.05);
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 18px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand .logo {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), var(--green));
  box-shadow: 0 12px 28px rgba(47, 107, 255, 0.22);
}

.brand small,
.section-head p,
.hero-text,
.contact-card li,
.roadmap-list,
.site-footer,
.hero-note p {
  color: var(--sub);
}

.brand small {
  display: block;
  margin-top: 4px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--sub);
  transition: all 0.2s ease;
}

nav a:hover,
nav a.btn {
  color: var(--blue);
  background: var(--blue-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 20px;
  border-radius: 14px;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), var(--green));
  box-shadow: 0 14px 30px rgba(47, 107, 255, 0.18);
}

.btn.ghost {
  color: var(--blue);
  border: 1px solid rgba(47, 107, 255, 0.16);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: none;
}

.hero {
  padding: 72px 0 46px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) 360px;
  gap: 24px;
  align-items: start;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 12px;
  color: var(--blue);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
}

h1 {
  margin-bottom: 18px;
  font-size: 52px;
  line-height: 1.14;
}

h2 {
  font-size: 34px;
  line-height: 1.2;
}

.hero-text {
  max-width: 760px;
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 26px 0 32px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metric-card,
.feature-card,
.case-card,
.hero-panel,
.contact-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.metric-card {
  padding: 18px;
}

.metric-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 32px;
  color: var(--text);
}

.metric-card span {
  color: var(--sub);
  font-size: 14px;
}

.hero-panel {
  padding: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(244, 249, 255, 0.92));
}

.hero-panel h3 {
  margin-bottom: 16px;
  font-size: 22px;
}

.hero-panel ol {
  padding-left: 18px;
  color: var(--sub);
  line-height: 1.9;
}

.hero-note {
  margin-top: 20px;
  padding: 16px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(47, 107, 255, 0.08), rgba(24, 178, 140, 0.06));
}

.hero-note span,
.contact-card span {
  display: block;
  margin-bottom: 8px;
  color: var(--sub);
}

.hero-note strong,
.contact-card strong {
  font-size: 18px;
}

.section {
  padding: 72px 0;
}

.section.alt {
  background: rgba(255, 255, 255, 0.46);
  border-top: 1px solid rgba(110, 133, 165, 0.10);
  border-bottom: 1px solid rgba(110, 133, 165, 0.10);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head p {
  max-width: 500px;
  line-height: 1.8;
}

.feature-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.case-card {
  padding: 24px;
}

.feature-card i {
  margin-bottom: 18px;
  font-size: 24px;
  color: var(--blue);
}

.feature-card h3,
.case-card h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.feature-card p,
.case-card p {
  color: var(--sub);
  line-height: 1.75;
}

.pill,
.case-meta span {
  display: inline-flex;
  margin-right: 8px;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--blue);
  background: var(--blue-soft);
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) 360px;
  gap: 24px;
}

.roadmap-list {
  padding-left: 20px;
  line-height: 2;
}

.contact-card {
  padding: 24px;
}

.contact-card ul {
  padding-left: 18px;
  margin: 14px 0 0;
}

.contact-box {
  margin-top: 18px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(47, 107, 255, 0.08);
}

.contact-box.secondary {
  background: rgba(24, 178, 140, 0.08);
}

.contact-card small {
  color: var(--sub);
}

.site-footer {
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.footer-wrap div {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 1080px) {
  .hero-grid,
  .roadmap-grid,
  .section-head {
    display: grid;
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  nav {
    display: none;
  }

  h1 {
    font-size: 36px;
  }

  .feature-grid,
  .case-grid,
  .metric-grid {
    grid-template-columns: 1fr;
  }
}