:root {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: #172033;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 0%, rgba(56, 189, 248, 0.09), transparent 34rem),
    var(--bg);
  font: 15px/1.78 "Segoe UI", "Microsoft YaHei", sans-serif;
}

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

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.92);
}

.site-header-inner,
.document,
.site-footer {
  width: min(900px, calc(100% - 36px));
  margin: 0 auto;
}

.site-header-inner {
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

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

.document {
  margin-top: 34px;
  margin-bottom: 34px;
  padding: clamp(24px, 5vw, 50px);
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(23, 32, 51, 0.94);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.2);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1.25;
}

.meta {
  margin: 0 0 30px;
  color: var(--muted);
  font-size: 13px;
}

.lead {
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: rgba(56, 189, 248, 0.08);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.service-home {
  margin-top: clamp(32px, 8vh, 80px);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.link-card {
  display: flex;
  min-height: 118px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  background: #111a2b;
  text-decoration: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}

.link-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.link-card.primary {
  border-color: rgba(56, 189, 248, 0.55);
  background: rgba(56, 189, 248, 0.1);
}

.link-card strong {
  font-size: 16px;
}

.link-card span {
  color: var(--muted);
  font-size: 13px;
}

h2 {
  margin: 32px 0 10px;
  font-size: 19px;
}

h3 {
  margin: 22px 0 8px;
  font-size: 16px;
}

p,
ul {
  margin: 9px 0;
}

ul {
  padding-left: 24px;
}

code {
  padding: 2px 6px;
  border-radius: 5px;
  background: #0b1220;
  font-family: Consolas, monospace;
}

.notice {
  padding: 15px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #111a2b;
}

.site-footer {
  padding: 0 0 34px;
  color: var(--muted);
  text-align: center;
  font-size: 12px;
}

@media (max-width: 640px) {
  .site-header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .document {
    margin-top: 18px;
    padding: 23px 20px;
  }

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