/* know-everything · 报告站（独立于 web/ 幻灯片） */

:root {
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --bg: #f5f3ee;
  --surface: #fffefa;
  --surface-2: #efece4;
  --ink: #201f1c;
  --ink-soft: #45423c;
  --muted: #77726a;
  --line: #e0dbd0;
  --line-strong: #cac3b5;
  --accent: #b3432c;
  --accent-soft: #f7e7e1;
  --shadow: 0 1px 2px rgba(40, 32, 20, .04), 0 10px 30px rgba(40, 32, 20, .05);
  --radius: 14px;
  --measure: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141412;
    --surface: #1c1c19;
    --surface-2: #24231f;
    --ink: #ece9e2;
    --ink-soft: #cfcabf;
    --muted: #9d978c;
    --line: #302e28;
    --line-strong: #47443b;
    --accent: #e08064;
    --accent-soft: #2c211d;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 16px 40px rgba(0, 0, 0, .28);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

::selection {
  background: var(--accent);
  color: #fff;
}

.wrap {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

/* ---------- 顶栏 ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line);
}

.top .wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 60px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: .18em;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .01em;
  text-decoration: none;
  white-space: nowrap;
}

.brand span { color: var(--accent); }
.brand small {
  margin-left: .5em;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--muted);
}

.top .spacer { flex: 1; }

.top .nav {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--muted);
}

.top .nav a { text-decoration: none; }
.top .nav a:hover { color: var(--accent); }

.progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 30;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .08s linear;
}

/* ---------- 首页 ---------- */

.hero {
  padding: 84px 0 48px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(40px, 7vw, 74px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -.02em;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero .lede {
  max-width: 640px;
  margin: 22px 0 0;
  font-size: 16px;
  color: var(--muted);
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 44px;
  margin-top: 38px;
}

.stat b {
  display: block;
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.1;
}

.stat span {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.index {
  padding: 20px 0 96px;
}

.month {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 40px;
  padding: 46px 0;
  border-bottom: 1px solid var(--line);
}

.month:last-child { border-bottom: 0; }

.month-head {
  position: sticky;
  top: 88px;
  align-self: start;
}

.month-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.2;
}

.month-head .meta {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.month-head .monthly-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 12px;
  text-decoration: none;
  color: var(--ink-soft);
  transition: .18s ease;
}

.month-head .monthly-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.week + .week { margin-top: 34px; }

.week-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.week-head h3 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ink-soft);
}

.week-head span {
  font-size: 12px;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 12px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 150px;
  padding: 20px 20px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 2px 4px rgba(40, 32, 20, .05), 0 18px 40px rgba(40, 32, 20, .09);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.card time {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--muted);
}

.card h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
}

.card p {
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

.card .go {
  margin-top: auto;
  padding-top: 14px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: .18s ease;
}

.card:hover .go { opacity: 1; transform: none; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.5;
}

.badge.daily { background: var(--accent-soft); color: var(--accent); }
.badge.weekly { background: #e6efe9; color: #2f6b4f; }
.badge.monthly { background: #e8eaf4; color: #40518c; }

@media (prefers-color-scheme: dark) {
  .badge.weekly { background: #1e2b24; color: #79b797; }
  .badge.monthly { background: #22263a; color: #9aa8e0; }
}

/* ---------- 文章页 ---------- */

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 34px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
.crumbs .sep { opacity: .5; }

.doc-head {
  padding: 22px 0 34px;
  border-bottom: 1px solid var(--line);
}

.doc-head h1 {
  max-width: 900px;
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(30px, 4.6vw, 48px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.01em;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 20px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

.doc-meta span { display: inline-flex; align-items: center; gap: 6px; }

.doc-meta .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.layout {
  display: grid;
  grid-template-columns: 220px minmax(0, var(--measure));
  justify-content: center;
  gap: 56px;
  padding: 48px 0 96px;
}

.rail {
  align-self: start;
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 120px);
  overflow: auto;
  padding-right: 8px;
  scrollbar-width: thin;
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 30px;
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
}

.back:hover { color: var(--accent); }

.toc p {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}

.toc li { margin: 0; }

.toc a {
  display: block;
  padding: 5px 0 5px 14px;
  border-left: 2px solid transparent;
  margin-left: -1.5px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: .16s ease;
}

.toc a:hover { color: var(--ink); }

.toc a.active {
  border-left-color: var(--accent);
  color: var(--accent);
}

.toc .sub a { padding-left: 26px; font-size: 12px; }

.toc-mobile { display: none; }

.prose {
  min-width: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.prose > :first-child { margin-top: 0; }

.prose p {
  margin: 0 0 1.1em;
}

.prose h2 {
  margin: 2.4em 0 .8em;
  padding-top: .9em;
  border-top: 1px solid var(--line);
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  scroll-margin-top: 88px;
}

.prose h3 {
  margin: 1.8em 0 .6em;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  scroll-margin-top: 88px;
}

.prose h4, .prose h5, .prose h6 {
  margin: 1.5em 0 .5em;
  font-size: 16px;
  color: var(--ink);
  scroll-margin-top: 88px;
}

.prose strong { color: var(--ink); font-weight: 600; }

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
}

.prose a:hover { text-decoration-color: var(--accent); }

.prose ul, .prose ol {
  margin: 0 0 1.1em;
  padding-left: 1.4em;
}

.prose li { margin: .3em 0; }

.prose li::marker { color: var(--accent); }

.prose blockquote {
  margin: 0 0 1.4em;
  padding: 16px 20px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.prose blockquote p { margin: 0; }

.prose hr {
  margin: 1.9em 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.prose hr + h2 { margin-top: 1.1em; }

.prose code {
  padding: .15em .38em;
  background: var(--surface-2);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: .86em;
}

.prose pre {
  overflow: auto;
  margin: 0 0 1.4em;
  padding: 16px 18px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.prose pre code { padding: 0; background: 0; font-size: 13px; }

.table-wrap {
  overflow-x: auto;
  margin: 0 0 1.6em;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  scrollbar-width: thin;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

.prose th {
  position: sticky;
  top: 0;
  padding: 11px 14px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-align: left;
  color: var(--ink-soft);
}

.prose td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  color: var(--ink-soft);
}

.prose tbody tr:last-child td { border-bottom: 0; }
.prose tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--surface-2) 42%, transparent); }
.prose tbody tr:hover td { background: var(--accent-soft); }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.pager a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  background: var(--surface);
  transition: .18s ease;
}

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

.pager .next { text-align: right; }
.pager .dir { font-size: 11px; letter-spacing: .08em; color: var(--muted); }
.pager .title { font-size: 13.5px; line-height: 1.5; color: var(--ink-soft); }
.pager a:hover .title { color: var(--accent); }

.foot {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.8;
  color: var(--muted);
  word-break: break-all;
}

.site-foot {
  padding: 28px 0 48px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}

.site-foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
}

.empty {
  padding: 80px 0;
  text-align: center;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (max-width: 980px) {
  .layout {
    grid-template-columns: minmax(0, var(--measure));
    gap: 0;
    padding-top: 28px;
  }

  .rail { display: none; }

  .toc-mobile {
    display: block;
    margin-bottom: 30px;
    padding: 14px 18px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
  }

  .toc-mobile summary {
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--ink-soft);
  }

  .toc-mobile ul {
    margin: 12px 0 0;
    padding-left: 1.2em;
    font-size: 13px;
  }

  .toc-mobile li { margin: 5px 0; }
  .toc-mobile a { color: var(--muted); text-decoration: none; }

  .month {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .month-head { position: static; }
}

@media (max-width: 640px) {
  .wrap { width: calc(100% - 32px); }
  .hero { padding: 56px 0 34px; }
  .hero h1 { font-size: clamp(34px, 12vw, 48px); }
  .stats { gap: 20px 30px; }
  .stat b { font-size: 24px; }
  .month { padding: 32px 0; }
  .doc-head h1 { font-size: clamp(26px, 8vw, 36px); }
  .prose { font-size: 16px; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { text-align: left; }
  .prose table { font-size: 12px; }
  .prose th, .prose td { padding: 9px 11px; }
  .top .nav { display: none; }
}

/* ---------- 打印 ---------- */

@media print {
  :root {
    --bg: #fff;
    --surface: #fff;
    --surface-2: #f4f4f4;
    --ink: #000;
    --ink-soft: #222;
    --muted: #555;
    --line: #ddd;
    --accent: #000;
    --accent-soft: #f2f2f2;
    --shadow: none;
  }

  .top, .progress, .rail, .toc-mobile, .pager, .crumbs { display: none !important; }
  body { font-size: 11pt; }
  .layout { display: block; padding: 0; }
  .prose { max-width: none; }
  .table-wrap { overflow: visible; box-shadow: none; }
  .prose table { white-space: normal; font-size: 9pt; }
  .prose h2, .prose h3 { break-after: avoid; }
  .prose tr, .prose blockquote { break-inside: avoid; }
  a { text-decoration: none; }
}