:root {
  color-scheme: light;
  --bg: #f5efe6;
  --bg-soft: #fbf7f0;
  --panel: rgba(255, 255, 255, 0.72);
  --panel-strong: rgba(255, 255, 255, 0.92);
  --text: #1d1a16;
  --muted: #665a4d;
  --line: rgba(55, 42, 25, 0.14);
  --accent: #7a4f1d;
  --accent-strong: #3f2a12;
  --shadow: 0 20px 60px rgba(80, 57, 31, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(167, 123, 71, 0.14), transparent 32%),
    linear-gradient(180deg, #f6efe4 0%, #f3eadf 44%, #efe4d5 100%);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
  z-index: 10;
}

.skip-link:focus {
  transform: translateY(0);
}

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 244, 0.74);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  font: 700 1.1rem/1 "Songti SC", "STSong", serif;
  color: #fff8ef;
  background: linear-gradient(145deg, #3e2a17, #8b5d2b);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16);
}

.brand-lockup strong,
.brand-lockup p {
  display: block;
  margin: 0;
}

.brand-lockup p {
  color: var(--muted);
  font-size: 0.92rem;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  color: var(--muted);
  font-size: 0.95rem;
}

.topnav a {
  padding: 8px 0;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 22px;
  align-items: start;
  margin-top: 22px;
}

.article,
.rail {
  min-width: 0;
}

.hero,
.section,
.rail-card,
.about-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--panel);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(270px, 0.65fr);
  gap: 18px;
  padding: 28px;
}

.eyebrow,
.kicker {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 1.1;
  margin-bottom: 16px;
}

h2 {
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
  line-height: 1.2;
  margin-bottom: 0;
}

h3 {
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: 10px;
}

.lead {
  font-size: 1.06rem;
  line-height: 1.85;
  color: #2f261d;
  margin-bottom: 18px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip-row span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(122, 79, 29, 0.09);
  color: var(--accent-strong);
  font-size: 0.92rem;
}

.hero-panel {
  padding: 18px;
  border-radius: calc(var(--radius-xl) - 4px);
  border: 1px solid rgba(122, 79, 29, 0.16);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.85), rgba(246, 237, 223, 0.96));
}

.panel-kicker {
  margin: 0 0 12px;
  font-weight: 700;
  color: var(--accent);
}

.panel-list {
  margin: 0;
  padding-left: 1.1rem;
  color: #423528;
  line-height: 1.85;
}

.section {
  padding: 24px 26px;
  margin-top: 20px;
}

.section--soft {
  background: rgba(255, 250, 244, 0.88);
}

.section--contrast {
  background:
    linear-gradient(180deg, rgba(255, 253, 249, 0.9), rgba(252, 245, 235, 0.95));
}

.section-heading {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

.meaning-grid,
.rewrite-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.meaning-card,
.rewrite-grid article {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(122, 79, 29, 0.12);
}

.meaning-card p,
.rewrite-grid p,
.example-stack p,
.signal-list span,
.rail-card p {
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 0;
}

.signal-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.signal-list li {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(122, 79, 29, 0.11);
}

.signal-list strong {
  color: var(--accent-strong);
}

.example-stack {
  display: grid;
  gap: 14px;
}

.example-stack p {
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(122, 79, 29, 0.1);
}

.rail {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 16px;
}

.rail-card {
  padding: 20px;
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 4px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.about-layout {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 150px);
  padding: 28px 0 10px;
}

.about-card {
  width: min(720px, 100%);
  padding: 28px;
}

.about-card p {
  color: var(--muted);
  line-height: 1.9;
}

.home-link {
  display: inline-flex;
  margin-top: 8px;
  padding: 11px 15px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff8ef;
  text-decoration: none;
}

@media (max-width: 980px) {
  .layout,
  .hero,
  .meaning-grid,
  .rewrite-grid {
    grid-template-columns: 1fr;
  }

  .rail {
    position: static;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 18px, 1240px);
    padding-top: 10px;
  }

  .topbar {
    border-radius: 22px;
    padding: 14px 16px;
    align-items: flex-start;
    flex-direction: column;
  }

  .topnav {
    justify-content: flex-start;
    gap: 10px 16px;
  }

  .hero,
  .section,
  .rail-card,
  .about-card {
    border-radius: 22px;
  }

  .signal-list li {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
}