:root {
  --paper: #f6f1e7;
  --paper-soft: #fffaf0;
  --ink: #15201d;
  --muted: #65736d;
  --line: rgba(21, 32, 29, .18);
  --teal: #0a6f68;
  --blue: #245e85;
  --brick: #b64b36;
  --gold: #a57b21;
  --violet: #5d558f;
  --panel: rgba(255, 250, 240, .86);
  --shadow: 0 24px 70px rgba(21, 32, 29, .13);
  --radius: 8px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(21, 32, 29, .045) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(0deg, rgba(21, 32, 29, .035) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(120deg, rgba(10, 111, 104, .06), rgba(182, 75, 54, .05) 42%, rgba(36, 94, 133, .06)),
    var(--paper);
  font-family: Georgia, "Songti SC", "Noto Serif CJK SC", "SimSun", serif;
  line-height: 1.72;
}
a { color: inherit; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92em; }
.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 20;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--paper-soft);
  border-radius: 6px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
.skip:focus { top: 16px; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 13px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(246, 241, 231, .92);
  backdrop-filter: blur(14px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-weight: 800;
  font-size: 13px;
  white-space: nowrap;
}
.brand-mark {
  width: 23px;
  height: 23px;
  border: 1px solid var(--ink);
  background:
    linear-gradient(135deg, var(--teal) 0 50%, transparent 50%),
    linear-gradient(315deg, var(--brick) 0 50%, var(--paper-soft) 50%);
}
.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}
.nav a {
  text-decoration: none;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 240, .66);
}
.nav a[aria-current="page"], .nav a:hover { color: var(--paper-soft); background: var(--ink); }
main { min-height: 80vh; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, .9fr);
  gap: clamp(28px, 5vw, 74px);
  align-items: center;
  padding: 70px clamp(18px, 5vw, 72px) 40px;
}
.page-hero { max-width: 1160px; padding: 64px clamp(18px, 5vw, 72px) 24px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  padding: 6px 10px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 240, .72);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}
.eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brick);
  box-shadow: 15px 0 0 var(--teal), 30px 0 0 var(--blue);
  margin-right: 28px;
}
h1, h2, h3 { margin-top: 0; line-height: 1.15; letter-spacing: 0; }
h1 { margin-bottom: 22px; font-size: clamp(36px, 6.2vw, 82px); max-width: 980px; }
h2 { margin-bottom: 16px; font-size: clamp(28px, 4vw, 48px); }
h3 { margin-bottom: 10px; font-size: clamp(20px, 2.2vw, 27px); }
p { margin-top: 0; }
.lede {
  max-width: 820px;
  color: #33413c;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.82;
}
.hero-meta, .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: #293630;
  font-size: 13px;
}
.board {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 240, .88);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.board img, .board svg { display: block; width: 100%; height: auto; }
.section { padding: 54px clamp(18px, 5vw, 72px); }
.section.tight { padding-top: 28px; padding-bottom: 32px; }
.section-head { max-width: 880px; margin-bottom: 24px; }
.section-head p {
  color: var(--muted);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
.kicker {
  margin-bottom: 8px;
  color: var(--brick);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.card h3 { font-size: clamp(19px, 2vw, 25px); }
.card p, .card li {
  color: #3c4944;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
.card ul { padding-left: 20px; margin: 0; }
.metric {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--teal);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 800;
}
.toc {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.toc a {
  min-height: 112px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  text-decoration: none;
}
.toc a strong { display: block; margin-bottom: 8px; font-size: 21px; }
.toc a span {
  color: var(--muted);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
.quote {
  max-width: 980px;
  margin: 0;
  padding: 28px;
  border-left: 6px solid var(--brick);
  background: rgba(255, 250, 240, .78);
  font-size: clamp(25px, 3.8vw, 44px);
  line-height: 1.36;
}
.quote cite {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  font-style: normal;
}
.timeline { max-width: 1080px; }
.timeline-item {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.timeline-item .time {
  color: var(--blue);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-weight: 800;
  text-decoration: none;
}
.timeline-item p, .transcript-item p, .source-note {
  color: #3c4944;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
.table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
.table th, .table td { padding: 13px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.table th { color: var(--ink); background: rgba(21, 32, 29, .06); }
.table tr:last-child td { border-bottom: 0; }
.transcript-list { max-width: 1040px; }
.transcript-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.stamp {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--muted);
}
.stamp span, .stamp strong { display: block; }
.stamp span { color: var(--blue); font-weight: 800; }
.stamp strong { color: var(--ink); }
.source-note {
  max-width: 920px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.footer {
  padding: 34px clamp(18px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}
@media (max-width: 920px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .nav { justify-content: flex-start; }
  .hero { grid-template-columns: 1fr; padding-top: 44px; }
  .grid, .grid.two, .grid.four, .toc { grid-template-columns: 1fr; }
  .timeline-item, .transcript-item { grid-template-columns: 1fr; gap: 6px; }
  h1 { font-size: clamp(34px, 11vw, 62px); }
}