:root {
  --ink: #20242b;
  --muted: #646b75;
  --line: #e7e9ee;
  --paper: #ffffff;
  --soft: #f5f7fa;
  --accent: #1f6feb;
  --accent-dark: #174ea6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 7vw;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
  font-size: 18px;
}

nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}

nav a:hover {
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 56px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 72px 7vw;
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent-dark);
  font-size: 15px;
  font-weight: 700;
}

h1 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.12;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.hero-panel {
  display: grid;
  gap: 16px;
}

.hero-panel div,
.grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
  box-shadow: 0 16px 45px rgba(31, 43, 58, 0.06);
}

.hero-panel span {
  display: block;
  margin-bottom: 12px;
  color: var(--accent);
  font-weight: 700;
}

.hero-panel strong,
.grid h3 {
  display: block;
  margin: 0 0 8px;
  font-size: 20px;
}

.hero-panel p,
.grid p,
.muted p,
.legal p {
  margin: 0;
  color: var(--muted);
}

.section {
  padding: 72px 7vw;
}

.section h2,
.legal h2 {
  margin: 0 0 24px;
  font-size: 28px;
  line-height: 1.25;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

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

.muted p {
  max-width: 900px;
  font-size: 18px;
}

.legal {
  max-width: 900px;
  min-height: calc(100vh - 146px);
  padding: 56px 7vw 72px;
}

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

.legal h2 {
  margin-top: 36px;
  font-size: 22px;
}

.updated {
  margin-top: 12px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  padding: 24px 7vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 24px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 56px 24px;
  }

  .section,
  .legal {
    padding-left: 24px;
    padding-right: 24px;
  }

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