:root {
  --bg: #f6f7f4;
  --paper: #ffffff;
  --ink: #16181d;
  --muted: #5c6470;
  --line: rgba(22, 24, 29, 0.1);
  --accent: #0f9d6a;
  --accent-soft: rgba(15, 157, 106, 0.1);
  --warn: #8a4b12;
  --header: #111714;
  --header-ink: #f4fff8;
  --code: #eef3ef;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
    "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: var(--header);
  color: var(--header-ink);
  padding: 18px 24px;
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(15, 157, 106, 0.35);
}

.site-header-inner,
.wrap,
.footer-inner {
  max-width: 980px;
  margin: 0 auto;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: #7dffc3;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.brand:hover {
  text-decoration: none;
}

.brand span {
  color: var(--header-ink);
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.nav a {
  color: rgba(244, 255, 248, 0.82);
}

.wrap {
  padding: 32px 20px 72px;
}

.doc {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 40px 40px 56px;
  box-shadow: 0 16px 40px rgba(17, 23, 20, 0.05);
}

h1 {
  font-size: 32px;
  line-height: 1.25;
  margin: 0 0 12px;
  letter-spacing: -0.03em;
}

.meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 28px;
}

.notice {
  background: var(--accent-soft);
  border: 1px solid rgba(15, 157, 106, 0.22);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 20px 0 28px;
  color: #13543a;
}

.toc {
  background: #f8faf8;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 22px;
  margin: 0 0 36px;
}

.toc h2 {
  font-size: 15px;
  margin: 0 0 8px;
}

.toc ol {
  margin: 0;
  padding-left: 20px;
}

.toc li {
  margin: 4px 0;
}

h2 {
  font-size: 22px;
  margin: 42px 0 14px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

h2:first-of-type {
  border-top: 0;
}

h3 {
  font-size: 18px;
  margin: 28px 0 10px;
}

p,
li {
  color: #22262d;
}

strong.mark,
.mark {
  font-weight: 650;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 22px;
  font-size: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f3f6f3;
  font-weight: 650;
}

tr:last-child td {
  border-bottom: 0;
}

th:last-child,
td:last-child {
  border-right: 0;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 14px 0 22px;
}

.table-wrap table {
  margin: 0;
  min-width: 720px;
}

blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: #f7fbf8;
  color: #2b3330;
}

code,
.snippet {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  background: var(--code);
  border-radius: 6px;
  padding: 1px 5px;
}

pre {
  background: #111714;
  color: #e8fff3;
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
}

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

.footer {
  padding: 24px 20px 40px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 720px) {
  .doc {
    padding: 24px 16px 40px;
    border-radius: 14px;
  }

  h1 {
    font-size: 26px;
  }

  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}