:root {
  --bg: #f5f1e8;
  --panel: #fffaf0;
  --panel-strong: #f0e0bf;
  --text: #2a241d;
  --muted: #6f6559;
  --line: #d8ccb7;
  --accent: #b65a2a;
  --accent-strong: #7f3312;
  --code: #f3ebdf;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(182, 90, 42, 0.18), transparent 28%),
    linear-gradient(180deg, #f8f4ec 0%, var(--bg) 100%);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

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

img,
video {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}

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

pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 14px;
  background: #201b17;
  color: #f6eee3;
}

code {
  padding: 0.12rem 0.36rem;
  border-radius: 6px;
  background: var(--code);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}

th,
td {
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--accent);
  background: rgba(182, 90, 42, 0.08);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(248, 244, 236, 0.82);
  border-bottom: 1px solid rgba(216, 204, 183, 0.8);
}

.site-header__inner,
.layout {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header__inner {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.site-title {
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.site-nav-mobile {
  display: none;
}

.site-nav-mobile summary {
  list-style: none;
  cursor: pointer;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 240, 0.9);
  font-weight: 700;
}

.site-nav-mobile summary::-webkit-details-marker {
  display: none;
}

.site-nav-mobile[open] summary {
  margin-bottom: 0.6rem;
}

.site-nav-mobile__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 0.4rem);
  min-width: 220px;
  display: grid;
  gap: 0.55rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 250, 240, 0.98);
  box-shadow: 0 22px 50px rgba(101, 74, 45, 0.12);
}

.site-nav-mobile__panel a {
  text-decoration: none;
}

.site-nav a,
.sidebar__nav a {
  text-decoration: none;
}

.site-nav a.is-active,
.sidebar__nav a.is-active {
  color: var(--accent);
  font-weight: 700;
}

.layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr) 240px;
  gap: 1.5rem;
  padding: 2rem 0 3rem;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 5.5rem;
  height: fit-content;
}

.sidebar--nav {
  grid-column: 1;
}

.content {
  grid-column: 2;
  min-width: 0;
}

.sidebar--toc {
  grid-column: 3;
}

.sidebar__card,
.doc {
  background: rgba(255, 250, 240, 0.92);
  border: 1px solid rgba(216, 204, 183, 0.9);
  border-radius: 22px;
  box-shadow: 0 22px 50px rgba(101, 74, 45, 0.08);
}

.sidebar__card {
  padding: 1rem;
}

.sidebar__card + .sidebar__card {
  margin-top: 1rem;
}

.sidebar__eyebrow {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar__nav {
  display: grid;
  gap: 0.7rem;
}

.sidebar__toc ul {
  margin: 0;
  padding-left: 1rem;
}

.sidebar__toc li + li {
  margin-top: 0.4rem;
}

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

.sidebar__toc ul ul {
  margin-top: 0.45rem;
}

.doc-header {
  padding: 2rem 2rem 0;
}

.doc-header h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
}

.doc-body {
  padding: 1rem 2rem 2rem;
}

.doc-description {
  max-width: 48rem;
  margin: 0.8rem 0 0;
  color: var(--muted);
}

.doc-body h2,
.doc-body h3,
.doc-body h4 {
  scroll-margin-top: 6rem;
}

.doc-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}

.doc-pagination {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 0 2rem 2rem;
}

.doc-pagination__link {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(240, 224, 191, 0.35));
  color: inherit;
  text-decoration: none;
}

.doc-pagination__link span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.doc-pagination__link--next {
  text-align: right;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.home-card {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(240, 224, 191, 0.35));
  text-decoration: none;
  color: inherit;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.home-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.home-card strong {
  display: block;
  margin-bottom: 0.35rem;
}

@media (max-width: 900px) {
  .site-header__inner {
    position: relative;
  }

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

  .sidebar {
    position: static;
  }

  .sidebar--nav,
  .content,
  .sidebar--toc {
    grid-column: auto;
  }

  .site-nav {
    display: none;
  }

  .site-nav-mobile {
    display: block;
  }

  .doc-header,
  .doc-body {
    padding-left: 1.2rem;
    padding-right: 1.2rem;
  }

  .doc-pagination {
    grid-template-columns: 1fr;
    padding-left: 1.2rem;
    padding-right: 1.2rem;
  }
}