/* 第1套：场景驱动 · 单栏叙事 · 衬线标题 · 砂色底 */
:root {
  --ink: #241f1a;
  --muted: #5c5348;
  --sand: #f3ead8;
  --paper: #fffaf0;
  --teal: #0d5c58;
  --teal-deep: #083e3b;
  --line: #d4c6a8;
  --cta: #c45c26;
  --cta-ink: #fff8f0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--sand);
  color: var(--ink);
  line-height: 1.85;
  font-size: 17px;
}

.topbar {
  background: var(--teal-deep);
  color: #e8f4f3;
  text-align: center;
  padding: 10px 16px;
  font-size: 14px;
  letter-spacing: 0.04em;
}
.wrap { width: min(820px, calc(100% - 36px)); margin: 0 auto; }

header.mast {
  padding: 28px 0 12px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: block;
  text-align: center;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 34px;
  letter-spacing: 0.16em;
  color: var(--teal);
  text-decoration: none;
  font-weight: 700;
}
nav.scene-nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-top: 16px;
  padding-bottom: 8px;
}
nav.scene-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
nav.scene-nav a.current {
  color: var(--teal);
  border-bottom-color: var(--teal);
  font-weight: 700;
}

.hero {
  padding: 48px 0 28px;
}
.hero h1 {
  font-family: Georgia, "Songti SC", serif;
  font-size: 34px;
  line-height: 1.35;
  margin-bottom: 18px;
}
.hero .lead { color: var(--muted); margin-bottom: 22px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
a.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--cta);
  color: var(--cta-ink);
  text-decoration: none;
  padding: 12px 22px;
  font-weight: 700;
  border-radius: 3px;
}
a.btn-ghost {
  background: transparent;
  color: var(--teal);
  border: 1px solid var(--teal);
}
.hero-meta {
  margin-top: 18px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--muted);
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }

.intro-pair {
  display: grid;
  gap: 18px;
  margin: 28px 0 8px;
}
@media (min-width: 760px) {
  .intro-pair { grid-template-columns: 1fr 1fr; }
}
.scene {
  background: var(--paper);
  border-left: 6px solid var(--teal);
  padding: 22px 24px;
  margin: 22px 0;
}
.scene h2 {
  font-family: Georgia, "Songti SC", serif;
  font-size: 23px;
  margin-bottom: 12px;
}
.scene p + p { margin-top: 12px; }
.scene ul { margin: 12px 0 0 1.2em; }
.scene li { margin: 6px 0; }

.band {
  margin: 36px 0;
  padding: 8px 0 0;
}
.band h2 {
  font-family: Georgia, "Songti SC", serif;
  font-size: 24px;
  margin-bottom: 12px;
}
.band p + p { margin-top: 12px; }

table.plain {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 15px;
}
table.plain th, table.plain td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  background: var(--paper);
}
table.plain th { background: #e7dcc4; }

.faq { margin: 40px 0 20px; }
.faq h2 {
  font-family: Georgia, "Songti SC", serif;
  font-size: 24px;
  margin-bottom: 16px;
}
.faq article {
  border-top: 1px solid var(--line);
  padding: 14px 0;
}
.faq h3 { font-size: 17px; margin-bottom: 8px; }
.faq p { color: var(--muted); }

.download-strip {
  background: var(--teal);
  color: #f3fffe;
  padding: 28px 24px;
  margin: 32px 0;
}
.download-strip h2 { font-family: Georgia, serif; margin-bottom: 10px; }
.download-strip a.btn { background: #fff; color: var(--teal-deep); margin-top: 12px; }

footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 48px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}
footer p { margin: 8px 0; }
footer a { color: var(--teal); }

svg.icon { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; }

@media (max-width: 640px) {
  .hero h1 { font-size: 26px; }
  nav.scene-nav { gap: 16px; }
}