:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #5d6978;
  --paper: #fffdf7;
  --panel: #ffffff;
  --line: #dde5ef;
  --brand: #0f766e;
  --brand-deep: #134e4a;
  --accent: #f59e0b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(15, 118, 110, 0.16), transparent 30rem),
    linear-gradient(135deg, #f8fbff 0%, var(--paper) 55%, #eef7f4 100%);
  font-family: "Noto Serif CJK SC", "Noto Serif SC", "Source Han Serif SC", "WenQuanYi Micro Hei", "WenQuanYi Zen Hei", Georgia, serif;
  line-height: 1.72;
}

a {
  color: var(--brand-deep);
}

.site-header {
  padding: 3rem clamp(1.25rem, 4vw, 4rem) 2rem;
  border-bottom: 1px solid var(--line);
}

.site-header p {
  max-width: 48rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.28;
  margin: 2rem 0 0.75rem;
  font-family: "Noto Sans CJK SC", "Noto Sans SC", "Source Han Sans SC", "WenQuanYi Micro Hei", "WenQuanYi Zen Hei", "Microsoft YaHei", sans-serif;
}

h1 {
  margin-top: 0;
  font-size: clamp(2.15rem, 5vw, 4.5rem);
  letter-spacing: -0.04em;
}

h2 {
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.doc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.doc-nav,
.doc-card,
.doc-article {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 48px rgba(19, 78, 74, 0.08);
}

.doc-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1rem;
}

.doc-nav a {
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: #eef7f4;
  text-decoration: none;
  font-family: "Noto Sans CJK SC", "Noto Sans SC", "WenQuanYi Micro Hei", "WenQuanYi Zen Hei", "Microsoft YaHei", sans-serif;
  font-size: 0.95rem;
}

.doc-article {
  padding: clamp(1.25rem, 3vw, 3rem);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.doc-card {
  display: flex;
  min-height: 15rem;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem;
  text-decoration: none;
}

.doc-card span {
  color: var(--accent);
  font-family: "Noto Sans CJK SC", "Noto Sans SC", "WenQuanYi Micro Hei", "WenQuanYi Zen Hei", "Microsoft YaHei", sans-serif;
  font-weight: 700;
}

.doc-card p {
  color: var(--muted);
}

blockquote {
  margin: 1.25rem 0;
  padding: 0.85rem 1rem;
  border-left: 4px solid var(--brand);
  background: #eef7f4;
}

code {
  padding: 0.1rem 0.35rem;
  border-radius: 7px;
  background: #edf2f7;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 18px;
  background: #101820;
  color: #f8fafc;
}

pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

table {
  width: 100%;
  margin: 1.25rem 0;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 16px;
  background: var(--panel);
}

th,
td {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef7f4;
}

.site-footer {
  padding: 2rem clamp(1.25rem, 4vw, 4rem);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media print {
  body {
    background: #fff;
  }

  .doc-nav {
    display: none;
  }

  .doc-article,
  .doc-card {
    border: 0;
    box-shadow: none;
  }
}