:root {
  color-scheme: light;
  --text: #20233a;
  --muted: #687086;
  --line: #e6e9f2;
  --brand: #635bff;
  --brand-dark: #22264a;
  --soft: #f5f6fa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6vw;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 900;
}

.logo {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: linear-gradient(135deg, #4b6bff, #35d3cc);
}

nav {
  display: flex;
  gap: 26px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.7fr);
  align-items: center;
  gap: 56px;
  padding: 72px 8vw;
  background: linear-gradient(180deg, #ffffff 0%, #f6f8ff 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: 68px;
  line-height: 1;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.7;
  font-weight: 700;
}

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

.button {
  height: 48px;
  padding: 0 22px;
  border-radius: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

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

.secondary {
  background: #ffffff;
  border: 1px solid var(--line);
}

.phone-preview {
  width: min(360px, 100%);
  margin: 0 auto;
  padding: 18px;
  border-radius: 36px;
  background: var(--brand-dark);
  box-shadow: 0 24px 80px rgba(37, 45, 92, 0.22);
}

.phone-top {
  width: 86px;
  height: 5px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.32);
  margin: 0 auto 18px;
}

.screen-card,
.screen-list {
  border-radius: 20px;
  background: #ffffff;
  padding: 18px;
  margin-bottom: 12px;
}

.screen-card .tag {
  color: var(--brand);
  font-size: 12px;
  font-weight: 900;
}

.screen-card h2 {
  margin: 12px 0 8px;
  font-size: 24px;
}

.screen-card p,
.card p,
.contact p,
.doc p {
  color: var(--muted);
  line-height: 1.75;
  font-weight: 700;
}

.screen-list {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-weight: 800;
}

.screen-list strong {
  color: var(--text);
}

.section {
  padding: 76px 8vw;
}

.band {
  background: var(--soft);
}

.section-head {
  max-width: 680px;
  margin-bottom: 28px;
}

.section h2,
.contact h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.25;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.card {
  min-height: 190px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: #ffffff;
}

.card h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

.steps {
  margin: 0;
  padding-left: 22px;
  color: var(--text);
  font-size: 17px;
  line-height: 2;
}

.notice {
  max-width: 900px;
  margin-top: 24px;
  padding: 16px 18px;
  border-radius: 8px;
  background: #fff7ed;
  color: #9a3412;
  font-weight: 800;
  line-height: 1.7;
}

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

.links a {
  min-width: 220px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 900;
  background: #ffffff;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 32px;
  align-items: start;
  background: var(--brand-dark);
  color: #ffffff;
}

.contact p {
  color: rgba(255, 255, 255, 0.76);
}

.contact-card {
  border-radius: 8px;
  background: #ffffff;
  padding: 22px;
}

.contact-card p {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin: 0;
  padding: 16px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.contact-card p:last-child {
  border-bottom: 0;
}

.contact-card strong {
  color: var(--text);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  padding: 24px 8vw;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  border-top: 1px solid var(--line);
}

.icp-link {
  color: var(--muted);
  font-weight: 800;
}

.icp-link:hover {
  color: var(--brand);
}

.doc {
  max-width: 920px;
  margin: 0 auto;
  padding: 64px 24px 88px;
}

.doc h1 {
  font-size: 42px;
}

.doc h2 {
  margin-top: 34px;
  font-size: 22px;
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 900px) {
  .site-header {
    height: auto;
    min-height: 68px;
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 20px;
    gap: 12px;
  }

  nav {
    gap: 16px;
    flex-wrap: wrap;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding: 48px 20px;
  }

  h1 {
    font-size: 48px;
  }

  .lead {
    font-size: 17px;
  }

  .section {
    padding: 52px 20px;
  }

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

  .contact {
    grid-template-columns: 1fr;
  }

  .contact-card {
    width: 100%;
  }

  .site-footer {
    flex-direction: column;
    padding: 22px 20px;
  }
}