:root {
  --bg: #08131f;
  --panel: rgba(13, 27, 43, 0.8);
  --panel-strong: #102235;
  --text: #ecf6ff;
  --muted: #9bb3c8;
  --line: rgba(158, 189, 223, 0.18);
  --teal: #8cf3d9;
  --blue: #71b7ff;
  --gold: #ffd98e;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(113, 183, 255, 0.18), transparent 28%),
    radial-gradient(circle at 85% 15%, rgba(140, 243, 217, 0.12), transparent 24%),
    linear-gradient(180deg, #091320 0%, #07111b 55%, #060d15 100%);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

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

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

code {
  color: #bfe3ff;
}

.shell {
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  color: #082235;
  font-weight: 800;
  box-shadow: 0 14px 30px rgba(113, 183, 255, 0.28);
}

.brand-text {
  letter-spacing: 0.02em;
}

.topnav {
  display: inline-flex;
  gap: 10px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 17, 27, 0.6);
}

.topnav a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  transition: 0.2s ease;
}

.topnav a:hover,
.topnav a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.site-home {
  min-height: 100vh;
  overflow-x: hidden;
}

.ambient {
  position: fixed;
  border-radius: 999px;
  filter: blur(80px);
  opacity: 0.4;
  pointer-events: none;
}

.ambient-a {
  width: 320px;
  height: 320px;
  background: rgba(113, 183, 255, 0.22);
  top: 80px;
  right: -40px;
}

.ambient-b {
  width: 260px;
  height: 260px;
  background: rgba(140, 243, 217, 0.18);
  left: -40px;
  bottom: 20%;
}

.hero-layout {
  padding: 56px 0 72px;
}

.hero-card,
.panel,
.info-band,
.doc-sidebar,
.doc-hero,
.policy-hero,
.policy-content section {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-card {
  padding: 44px;
  border-radius: 34px;
}

.eyebrow,
.panel-kicker,
.band-kicker,
.sidebar-kicker {
  margin: 0;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  font-weight: 700;
}

.hero-card h1,
.policy-hero h1 {
  margin: 18px 0 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero-copy {
  max-width: 760px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #082235;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  box-shadow: 0 16px 34px rgba(113, 183, 255, 0.24);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.hero-meta span,
.code-chip code {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.grid-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.panel {
  padding: 28px;
  border-radius: 28px;
}

.panel h2 {
  margin: 16px 0 10px;
  font-size: 28px;
}

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

.text-link {
  display: inline-flex;
  margin-top: 20px;
  color: var(--teal);
  font-weight: 700;
}

.info-band {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 24px;
  padding: 28px;
  border-radius: 28px;
}

.info-band h2 {
  margin: 12px 0 10px;
  font-size: 28px;
}

.info-band p {
  margin: 0;
  color: var(--muted);
}

.code-chip {
  display: grid;
  gap: 10px;
  align-content: center;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 0 0 32px;
  color: var(--muted);
  font-size: 14px;
}

.doc-layout,
.policy-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 24px;
  padding: 34px 0 56px;
}

.doc-sidebar {
  position: sticky;
  top: 86px;
  align-self: start;
  padding: 24px;
  border-radius: var(--radius);
}

.doc-sidebar h1 {
  margin: 14px 0 10px;
  font-size: 34px;
  line-height: 1.1;
}

.sidebar-copy {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.toc {
  display: grid;
  gap: 8px;
  margin-top: 22px;
}

.toc a {
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--muted);
  transition: 0.2s ease;
}

.toc a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.doc-content,
.policy-content {
  display: grid;
  gap: 18px;
}

.doc-hero,
.policy-hero {
  padding: 32px;
  border-radius: 28px;
}

.doc-hero h2 {
  margin: 16px 0 12px;
  font-size: 42px;
  line-height: 1.1;
}

.doc-hero p,
.policy-hero p {
  margin: 0;
  color: var(--muted);
}

.doc-content section,
.policy-content section {
  padding: 28px;
  border-radius: 24px;
}

.doc-content h3,
.policy-content h2 {
  margin: 0 0 18px;
  font-size: 28px;
}

.doc-content h4 {
  margin: 22px 0 12px;
  font-size: 20px;
}

.doc-content p,
.doc-content li,
.policy-content p,
.policy-content li {
  color: #d2e1ee;
}

.doc-content ul,
.doc-content ol,
.policy-content ul,
.policy-content ol {
  margin: 12px 0 0;
  padding-left: 22px;
}

.doc-content pre {
  position: relative;
  overflow: auto;
  margin: 14px 0 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #07101a;
  color: #d4e7ff;
}

.copy-button {
  position: absolute;
  top: 12px;
  right: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--gold);
  background: rgba(255, 255, 255, 0.03);
}

.callout,
.contact-card {
  margin-top: 16px;
  padding: 18px;
  border: 1px solid rgba(140, 243, 217, 0.24);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(140, 243, 217, 0.08), rgba(113, 183, 255, 0.06));
}

.callout p,
.contact-card p {
  margin: 8px 0 0;
}

.policy-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 18px;
}

.policy-meta span {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 980px) {
  .doc-layout,
  .policy-layout,
  .grid-panels,
  .info-band {
    grid-template-columns: 1fr;
  }

  .doc-sidebar {
    position: static;
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(1180px, calc(100vw - 24px));
  }

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

  .hero-card,
  .panel,
  .info-band,
  .doc-sidebar,
  .doc-hero,
  .policy-hero,
  .doc-content section,
  .policy-content section {
    padding: 22px;
  }

  .hero-card h1,
  .policy-hero h1 {
    font-size: 40px;
  }

  .doc-hero h2 {
    font-size: 32px;
  }

  .topnav {
    width: 100%;
    justify-content: space-between;
  }
}