:root {
  --paper: #f6f1e8;
  --ink: #171410;
  --muted: #5f574c;
  --line: #d9cfbd;
  --copper: #c45c26;
  --copper-deep: #9a3f14;
  --white: #fffcf6;
  --sans: ui-sans-serif, system-ui, "Segoe UI", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", "Songti SC", "Noto Serif SC", Georgia, serif;
  --w: 1000px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--ink); color: #fff; padding: 8px 12px;
}
.skip:focus { left: 12px; z-index: 20; }

/* 全站唯一内容宽 */
.shell {
  width: min(100% - 48px, var(--w));
  margin-left: auto;
  margin-right: auto;
}

header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(246,241,232,.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 64px; flex-wrap: wrap;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; letter-spacing: -0.03em; font-size: 1.05rem;
}
.mark {
  width: 28px; height: 28px; border-radius: 9px;
  background: var(--copper); color: #fff;
  display: grid; place-items: center; font-size: 15px; font-weight: 800;
}
.nav { display: flex; flex-wrap: wrap; gap: 2px; }
.nav a {
  color: var(--muted); font-size: 0.9rem;
  padding: 8px 11px; border-radius: 999px;
}
.nav a:hover { color: var(--ink); background: rgba(0,0,0,.04); }
.nav a.on {
  color: var(--ink); font-weight: 650;
  background: var(--white); border: 1px solid var(--line);
}

.page-hero {
  padding: 48px 0 28px;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  margin: 0 0 12px;
  font-size: 0.78rem; letter-spacing: 0.12em;
  color: var(--copper-deep); font-weight: 700;
}
h1 {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  line-height: 1.2; letter-spacing: -0.03em;
  margin: 0 0 14px; font-weight: 600;
}
.lead {
  font-size: 1.05rem; color: var(--muted);
  margin: 0;
  max-width: 42rem;
}

.section {
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
}
.section:last-of-type { border-bottom: 0; }
.section h2 {
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}
.section .intro {
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 42rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}
a.card:hover { border-color: var(--copper); }
.card .k {
  margin: 0;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--copper-deep);
}
.card h3 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.card p { margin: 0; color: var(--muted); font-size: 0.94rem; }
.card ul {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}
.card li {
  position: relative;
  padding-left: 16px;
  color: var(--ink);
  font-size: 0.9rem;
}
.card li::before {
  content: "";
  position: absolute;
  left: 0; top: .6em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--copper);
}
.card .more {
  margin-top: auto;
  padding-top: 8px;
  color: var(--copper-deep);
  font-weight: 650;
  font-size: 0.9rem;
}

.story p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 42rem;
}
.story p:last-child { margin-bottom: 0; }
.story strong { color: var(--ink); font-weight: 650; }

.scene {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 20px;
  margin: 0 0 14px;
}
.scene:last-child { margin-bottom: 0; }
.scene h3 { margin: 0 0 8px; font-size: 1.02rem; }
.scene p { margin: 0; color: var(--muted); }

.list-quiet {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.list-quiet li {
  padding: 14px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--muted);
}
.list-quiet strong {
  display: block;
  color: var(--ink);
  margin-bottom: 4px;
  font-weight: 650;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}
.btn {
  display: inline-flex; align-items: center;
  background: var(--ink); color: #fff;
  padding: 11px 17px; border-radius: 999px;
  font-weight: 650; font-size: 0.94rem;
}
.btn-ghost {
  background: transparent; color: var(--ink);
  border: 1px solid var(--line);
}

footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 36px;
  color: var(--muted);
  font-size: 0.88rem;
}
.foot-inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .page-hero { padding-top: 36px; }
}