:root {
  --ink: #2a1614;
  --wine: #8b1a1a;
  --wine-deep: #5c1010;
  --gold: #c4a35a;
  --paper: #fff8f0;
  --sand: #f3e6d2;
  --line: #e2d0b6;
  --muted: #6b5348;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
body {
  font-family: "Songti SC", "SimSun", "STSong", serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.85;
  font-size: 17px;
}

.site-rail {
  display: grid;
  grid-template-columns: 232px 1fr;
  min-height: 100vh;
}

.rail {
  background: var(--wine-deep);
  color: #f6ecd8;
  padding: 28px 20px 40px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(196, 163, 90, 0.35);
  padding-bottom: 18px;
  margin-bottom: 22px;
}

.rail nav a {
  display: block;
  color: #f6ecd8;
  text-decoration: none;
  padding: 10px 8px;
  border-left: 3px solid transparent;
  margin-bottom: 6px;
}
.rail nav a.is-current {
  border-left-color: var(--gold);
  color: var(--gold);
  background: rgba(196, 163, 90, 0.12);
}

.rail-note {
  margin-top: 36px;
  font-size: 13px;
  color: #d8c4a0;
  line-height: 1.7;
}

.frame { padding: 0 0 60px; }
.top-strip {
  background: var(--sand);
  border-bottom: 1px solid var(--line);
  padding: 10px 40px;
  font-size: 14px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
}

.portal-hero {
  padding: 42px 40px 28px;
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 36px;
  background: linear-gradient(180deg, #fffdf8 0%, #f8ead4 100%);
  border-bottom: 4px solid var(--wine);
}
.portal-hero h1 {
  font-size: 34px;
  line-height: 1.35;
  color: var(--wine);
  margin-bottom: 16px;
}
.lead { font-size: 18px; margin-bottom: 22px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-main, .btn-side, .btn-os {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  padding: 12px 20px;
  font-size: 16px;
}
.btn-main { background: var(--wine); color: #fff; }
.btn-side { background: transparent; color: var(--wine); border: 1px solid var(--wine); }
.btn-os { background: #fff; border: 1px solid var(--line); color: var(--ink); font-size: 15px; }
.hero-aside {
  background: #fff;
  border: 1px solid var(--line);
  padding: 20px 22px;
}
.hero-aside h2 { font-size: 18px; color: var(--wine); margin-bottom: 10px; }
.hero-aside ul { padding-left: 18px; }
.hero-aside li { margin: 6px 0; }

.scene-strip {
  padding: 36px 40px 8px;
}
.scene-strip h2 { color: var(--wine); font-size: 26px; margin-bottom: 14px; }
.scene-row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}
.scene-ico {
  width: 64px;
  height: 64px;
  background: var(--sand);
  display: flex;
  align-items: center;
  justify-content: center;
}
.prose { padding: 28px 40px 8px; }
.prose h2 { color: var(--wine); font-size: 26px; margin: 8px 0 14px; }
.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { margin: 0 0 16px 22px; }
.quote-box {
  margin: 16px 40px;
  padding: 18px 22px;
  background: #fff;
  border-left: 5px solid var(--gold);
}
.faq-list { padding: 10px 40px 20px; }
.faq-item { padding: 16px 0; border-bottom: 1px solid var(--line); }
.faq-item h3 { font-size: 18px; margin-bottom: 8px; }
.dl-band {
  margin: 24px 40px 0;
  background: var(--wine);
  color: #fff;
  padding: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.dl-band a { color: #fff; }

.site-foot {
  background: #3a1a16;
  color: #e8d7c2;
  padding: 28px 40px 36px;
  font-size: 14px;
  line-height: 1.75;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 18px;
}
.site-foot a { color: #e8d7c2; }
.safe-line { color: #d8c4a0; margin-bottom: 8px; }

@media (max-width: 980px) {
  .site-rail { grid-template-columns: 1fr; }
  .rail { position: relative; height: auto; }
  .portal-hero, .foot-grid { grid-template-columns: 1fr; }
  .top-strip, .scene-strip, .prose, .faq-list, .dl-band, .site-foot, .portal-hero { padding-left: 20px; padding-right: 20px; }
}