:root {
  --cream: #f7f0e6;
  --cream-deep: #efe4d4;
  --ink: #2a1f1a;
  --brick: #b33a2b;
  --brick-deep: #8c2a1f;
  --muted: #6b5a50;
  --line: #e0d2c2;
  --soft: #fffaf4;
  --max: 1100px;
  --radius: 10px;
  font-family: "Fraunces", "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 0% 0%, rgba(179, 58, 43, 0.08), transparent 55%),
    linear-gradient(180deg, #faf5ee 0%, var(--cream) 40%, var(--cream-deep) 100%);
  line-height: 1.75;
  min-height: 100vh;
}

a { color: var(--brick-deep); text-underline-offset: 3px; }
a:hover { color: var(--brick); }

img { max-width: 100%; height: auto; display: block; }

.wrap { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(250, 245, 238, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-desktop {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
.nav-desktop a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.93rem;
}
.nav-desktop a:hover { color: var(--brick); }

.menu-toggle {
  display: none;
  background: var(--brick);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  font: inherit;
  cursor: pointer;
}

#mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0 0 0.8rem;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
#mobile-nav.open { display: flex; }
#mobile-nav a {
  color: var(--ink);
  text-decoration: none;
  padding: 0.45rem 0.25rem;
  border-bottom: 1px solid var(--line);
}

.ads-slot { border-bottom: 1px solid var(--line); }
.ads-slot .ads-wrap {
  background: var(--soft) !important;
  border-color: var(--line) !important;
  border-radius: var(--radius) !important;
}

/* split hero */
.split-hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 1.75rem 0 1.25rem;
}
.split-copy h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.4rem, 3.5vw, 2.05rem);
  line-height: 1.3;
  color: var(--brick-deep);
}
.split-copy .lead {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 1.02rem;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
.split-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1rem;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}
.btn-primary {
  background: var(--brick);
  color: #fff;
}
.btn-primary:hover { background: var(--brick-deep); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--brick-deep);
  border: 1px solid var(--brick);
}
.split-media figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--soft);
  box-shadow: 0 16px 36px rgba(42, 31, 26, 0.08);
}
.split-media figcaption {
  padding: 0.55rem 0.75rem 0.7rem;
  font-size: 0.88rem;
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.content-stack {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 0.5rem 0 3rem;
}

.section-block h2 {
  margin: 0 0 0.65rem;
  font-size: 1.3rem;
  color: var(--ink);
  border-bottom: 2px solid var(--brick);
  display: inline-block;
  padding-bottom: 0.2rem;
}
.section-block p {
  margin: 0 0 0.8rem;
  max-width: 72ch;
}

.media-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 0.75rem 0 1rem;
}
.media-row figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--soft);
}
.media-row figcaption {
  padding: 0.45rem 0.65rem 0.6rem;
  font-size: 0.85rem;
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.peer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 0.45rem;
  background: var(--soft);
  padding: 0 0.75rem;
}
.faq summary {
  cursor: pointer;
  padding: 0.65rem 0;
  color: var(--brick-deep);
  font-weight: 600;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
.faq details p { margin: 0 0 0.75rem; color: var(--muted); }

ul.plain {
  margin: 0.4rem 0 0.9rem;
  padding-left: 1.2rem;
  color: var(--muted);
}
ul.plain li { margin-bottom: 0.3rem; }

.site-footer {
  border-top: 1px solid var(--line);
  background: #2a1f1a;
  color: #d9cfc6;
  padding: 1.35rem 0 1.75rem;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 0.9rem;
}
.site-footer a { color: #f0e4d8; text-decoration: none; }
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  margin-bottom: 0.55rem;
}

.page-hero { padding: 1.5rem 0 0.5rem; }
.page-hero h1 { color: var(--brick-deep); margin: 0 0 0.35rem; }
.page-hero .muted { color: var(--muted); margin: 0 0 1rem; }
.prose { max-width: 68ch; padding-bottom: 2.5rem; }
.prose h2 { color: var(--ink); }
.err-box { padding: 3.5rem 0; text-align: center; }
.err-box h1 { color: var(--brick-deep); }

@media (max-width: 860px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: inline-block; }
  .split-hero {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .media-row { grid-template-columns: 1fr; }
}

/* SEO keyword highlight */
strong.kw, .kw{color:var(--accent,var(--brand,#c43b2c));font-weight:700}
mark.kw{background:rgba(196,59,44,.12);color:inherit;padding:0 .15em;border-radius:3px}