:root {
  color-scheme: light;
  --bg: #f5faf7;
  --surface: #ffffff;
  --surface-soft: #eef7f2;
  --text: #15221b;
  --muted: #5e6f66;
  --border: #d9e7df;
  --accent: #2f7f5f;
  --accent-strong: #1f6248;
  --amber: #a96a1c;
  --shadow: 0 12px 36px rgba(24, 64, 44, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.68;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(80, 161, 112, 0.18), transparent 32rem),
    linear-gradient(180deg, #fbfefc 0%, var(--bg) 58%, #edf6f1 100%);
}

a {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.page {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
}

.mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  font-size: 24px;
}

.navlinks {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  font-size: 15px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}

.hero-main,
.panel,
.doc-section {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-main {
  padding: 38px;
}

.panel {
  padding: 24px;
}

.doc-section {
  margin-bottom: 18px;
  padding: 24px;
}

.eyebrow,
.updated {
  margin: 0 0 10px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 16px;
  font-size: clamp(36px, 6vw, 58px);
}

h2 {
  margin-bottom: 12px;
  font-size: 25px;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 17px;
}

.lead {
  max-width: 760px;
  color: #30433a;
  font-size: 19px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.stack {
  display: grid;
  gap: 14px;
}

.link-card {
  display: block;
  min-height: 152px;
  padding: 24px;
  color: inherit;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.link-card:hover,
.link-card:focus-visible {
  border-color: var(--accent);
  text-decoration: none;
}

.link-card strong {
  display: block;
  margin-top: 14px;
  color: var(--accent-strong);
}

.facts {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.facts li {
  padding: 12px 14px;
  color: var(--muted);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
}

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

.row {
  display: grid;
  grid-template-columns: 0.85fr 1.45fr;
  gap: 16px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fbfefc;
}

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

ul {
  margin: 0;
  padding-left: 22px;
  color: var(--muted);
}

li + li {
  margin-top: 8px;
}

.note {
  border-left: 4px solid var(--accent);
  padding: 14px 16px;
  background: var(--surface-soft);
  border-radius: 0 8px 8px 0;
}

.warning {
  border-left-color: var(--amber);
}

footer {
  margin-top: 32px;
  padding-top: 22px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 14px;
}

@media (max-width: 780px) {
  .page {
    width: min(100% - 24px, 1040px);
    padding-top: 20px;
  }

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

  .navlinks {
    justify-content: flex-start;
  }

  .hero,
  .grid,
  .row {
    grid-template-columns: 1fr;
  }

  .hero-main,
  .panel,
  .doc-section,
  .link-card {
    padding: 20px;
  }
}