:root {
  --ink: #12324a;
  --teal: #0a6b6f;
  --teal-deep: #06484b;
  --sand: #f4efe6;
  --paper: #fffdf8;
  --line: #d7cfc0;
  --accent: #c46a2b;
  --muted: #5c6b73;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--sand);
  line-height: 1.75;
}
img, svg { display: block; }
a { color: var(--teal); }
.wrap { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 3px solid var(--teal);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1.25rem;
}
.brand svg { width: 32px; height: 32px; }
.nav { display: flex; gap: 8px; }
.nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px;
}
.nav a[aria-current="page"] {
  background: var(--teal);
  color: #fff;
}
.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  padding: 8px 12px;
  cursor: pointer;
}

.hero {
  background: linear-gradient(120deg, #12324a 0%, #0a6b6f 70%);
  color: #fff;
  padding: 56px 0 64px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 36px;
  align-items: center;
}
.hero h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.35;
  margin-bottom: 16px;
}
.hero p { color: #e7f3f3; margin-bottom: 14px; }
.cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 14px 22px;
  font-weight: 700;
  border-radius: 6px;
}
.cta:hover { filter: brightness(1.05); }
.hero-panel {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 22px;
}
.hero-panel dt { font-size: 0.85rem; opacity: 0.8; }
.hero-panel dd { margin: 0 0 12px; font-weight: 600; }

.band { padding: 56px 0; }
.band-alt { background: var(--paper); }
.band h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.55rem;
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 5px solid var(--teal);
}
.lead { margin-bottom: 16px; }
.scenes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 20px;
}
.scene {
  background: #fff;
  border: 1px solid var(--line);
  padding: 20px;
}
.scene h3 { font-size: 1.05rem; margin-bottom: 8px; color: var(--teal-deep); }
.note-list { margin: 12px 0 0 20px; }
.note-list li { margin-bottom: 8px; }
.table-wrap { overflow-x: auto; margin-top: 16px; }
table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}
th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
th { background: #e6f2f2; }
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}
.intro-box {
  background: #fff;
  border: 1px solid var(--line);
  padding: 16px 18px;
}
.intro-box h3 {
  font-size: 1.02rem;
  color: var(--teal-deep);
  margin-bottom: 8px;
}
.ilist { margin: 10px 0 0 20px; }
.ilist li { margin-bottom: 8px; }

@media (max-width: 860px) {
  .intro-grid { grid-template-columns: 1fr; }
}

.faq details {
  background: #fff;
  border: 1px solid var(--line);
  margin-bottom: 10px;
  padding: 12px 16px;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin-top: 8px; color: var(--muted); }

.footer {
  background: var(--ink);
  color: #d5dde3;
  padding: 32px 0 40px;
  font-size: 0.92rem;
}
.footer a { color: #9be0e3; }
.footer p { margin-bottom: 10px; }
.foot-nav { display: flex; gap: 16px; margin-bottom: 14px; }

@media (max-width: 860px) {
  .hero-grid, .scenes { grid-template-columns: 1fr; }
  .menu-btn { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    right: 20px;
    top: 72px;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--line);
    padding: 8px;
  }
  .nav.open { display: flex; }
}