:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #5d6b7a;
  --line: #d7e0eb;
  --blue: #2f7ed8;
  --blue-soft: #eaf4ff;
  --green: #2f9c67;
  --amber: #c57b12;
  --shadow: 0 18px 45px rgba(32, 47, 70, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 16px;
}

body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #f9fbfd 0%, var(--bg) 55%, #eef3f8 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.72;
  overflow-x: hidden;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: #eef3f8;
  color: #244a74;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.hero {
  min-height: 520px;
  padding: 28px;
  background:
    linear-gradient(130deg, rgba(47, 126, 216, 0.12), transparent 42%),
    linear-gradient(210deg, rgba(47, 156, 103, 0.12), transparent 38%),
    #fff;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: space-between;
  align-items: center;
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 0;
}

.brand {
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.navlinks {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
}

.hero-main {
  max-width: 1120px;
  margin: 90px auto 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: 52px;
  line-height: 1.12;
}

h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.25;
}

h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.lead {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
}

.primary {
  color: #fff;
  background: var(--blue);
}

.secondary {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
}

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 28px 80px;
}

.section {
  min-width: 0;
  margin-top: 26px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.section-head {
  margin-bottom: 18px;
}

.cards {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 18px;
  min-width: 0;
}

.card {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbfdff;
}

.section,
.card,
.split,
.steps,
p,
li {
  overflow-wrap: anywhere;
}

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

.feature-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  align-items: stretch;
  min-width: 0;
}

.card-media {
  min-height: 180px;
  padding: 20px;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--green));
}

.card-media span {
  display: block;
  margin-bottom: 34px;
  font-size: 42px;
  font-weight: 900;
}

.card-media strong {
  display: block;
  font-size: 18px;
  line-height: 1.35;
}

.card-body {
  align-self: center;
}

.split {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 26px;
  align-items: start;
  min-width: 0;
}

.steps {
  margin: 0;
  padding-left: 22px;
}

.steps li + li {
  margin-top: 10px;
}

.doc-header {
  padding: 28px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.doc-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 960px;
  margin: 0 auto;
}

.doc-page {
  max-width: 960px;
}

.doc-page .section {
  margin-top: 22px;
}

.doc-page pre {
  max-width: 100%;
  margin: 16px 0 0;
  padding: 16px;
  overflow-x: auto;
  border-radius: 12px;
  background: #14213d;
  color: #eef6ff;
}

.doc-page pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.checklist {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.check {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfdff;
}

.check strong {
  display: block;
  margin-bottom: 6px;
}

@media (max-width: 760px) {
  .hero {
    min-height: auto;
    padding: 20px 18px 34px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .navlinks {
    gap: 10px 14px;
  }

  .actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-main {
    margin-top: 44px;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 26px;
  }

  .lead {
    font-size: 17px;
  }

  .primary,
  .secondary {
    justify-content: center;
    width: 100%;
  }

  .page {
    padding: 18px 14px 52px;
  }

  .section {
    margin-top: 18px;
    padding: 22px 18px;
    border-radius: 16px;
  }

  .cards,
  .feature-card,
  .split,
  .checklist {
    grid-template-columns: 1fr;
  }

  .card-media {
    min-height: 150px;
  }

  .doc-header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 420px) {
  .hero {
    padding-inline: 16px;
  }

  h1 {
    font-size: 32px;
  }

  .page {
    padding-inline: 12px;
  }

  .section {
    padding: 20px 16px;
  }
}