:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #5f6b80;
  --line: #e3e7ef;
  --brand: #2563eb;
  --brand-strong: #1d4ed8;
  --brand-soft: #eaf1ff;
  --accent: #0f9f8f;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(23, 32, 51, 0.08);
  font-family: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--brand-strong);
}

img {
  max-width: 100%;
  height: auto;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 248, 251, 0.88);
  border-bottom: 1px solid rgba(227, 231, 239, 0.9);
  backdrop-filter: blur(14px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 18px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  padding: 8px 10px;
  color: var(--ink);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--brand);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  transition: background 0.15s ease, transform 0.15s ease;
}

.button:hover {
  background: var(--brand-strong);
  color: #fff;
  transform: translateY(-1px);
}

.button.secondary {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}

.button.secondary:hover {
  border-color: #c7cede;
  background: #fff;
}

.hero {
  padding: 76px 0 56px;
}

.hero .container {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 13px;
  font-weight: 600;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.03em;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(34px, 5vw, 56px);
}

.lead {
  margin: 0 0 30px;
  max-width: 620px;
  color: var(--muted);
  font-size: 18px;
}

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

.hero-panel {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: -20px -12px auto auto;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18), transparent 68%);
  z-index: -1;
}

.flow {
  display: grid;
  gap: 10px;
}

.flow-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcff;
}

.flow-row strong {
  font-size: 14px;
}

.flow-row span {
  color: var(--muted);
  font-size: 12px;
}

.flow-arrow {
  text-align: center;
  color: #9aa5b8;
  font-size: 12px;
  letter-spacing: 0.2em;
}

.section {
  padding: 64px 0;
}

.section-head {
  max-width: 680px;
  margin-bottom: 32px;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 3.4vw, 38px);
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  counter-reset: step;
}

.step {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  margin-bottom: 18px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.cta {
  padding: 56px 0;
}

.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px;
  border-radius: 22px;
  background: linear-gradient(135deg, #172033, #24365f);
  color: #fff;
}

.cta-box h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 3vw, 34px);
}

.cta-box p {
  margin: 0;
  color: #c8d2e6;
}

.site-footer {
  padding: 36px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

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

.site-footer nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.page {
  padding: 56px 0 24px;
}

.page-head {
  max-width: 760px;
  margin-bottom: 36px;
}

.page-head h1 {
  font-size: clamp(32px, 4.4vw, 48px);
}

.page-head p {
  color: var(--muted);
  font-size: 17px;
}

.list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.list strong {
  display: block;
  margin-bottom: 4px;
}

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

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.price-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.price-card.featured {
  border-color: #b9cdf5;
  box-shadow: var(--shadow);
}

.price {
  margin: 16px 0;
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.price small {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
}

.price-card ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
}

pre {
  overflow: auto;
  padding: 18px;
  border-radius: 12px;
  background: #172033;
  color: #e7ecf6;
  font-size: 13px;
  line-height: 1.6;
}

code {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

@media (max-width: 900px) {
  .hero .container,
  .grid,
  .steps,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 52px;
  }

  .hero-panel {
    order: -1;
  }

  .cta-box {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    right: 20px;
    left: 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .site-nav.open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }
}