/* 第1套：场景驱动 · 顶栏横幅 + 左右分栏 · 青绿 */
:root {
  --ink: #16333a;
  --muted: #4a6670;
  --line: #c9d8dc;
  --paper: #f4f1ea;
  --panel: #ffffff;
  --brand: #0c6b6f;
  --brand-dark: #08484c;
  --accent: #d9782c;
  --ok: #1f7a4d;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.75 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }
.skip {
  position: absolute; left: -999px;
}
.skip:focus { left: 12px; top: 12px; background: #fff; padding: 8px 12px; }

.mast {
  background: var(--brand-dark);
  color: #e7f3f3;
  border-bottom: 4px solid var(--accent);
}
.mast-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.04em;
  padding-bottom: 14px;
}
.brand svg { display: block; }
.nav { display: flex; gap: 4px; }
.nav a {
  color: #cfe7e8;
  text-decoration: none;
  padding: 10px 16px 14px;
  border-bottom: 3px solid transparent;
}
.nav a:hover { color: #fff; }
.nav a.current {
  color: #fff;
  border-bottom-color: var(--accent);
  background: rgba(255,255,255,0.06);
}

.hero {
  background: linear-gradient(120deg, #0c6b6f 0%, #12687c 55%, #1a4d62 100%);
  color: #f3fafa;
}
.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 20px 56px;
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 36px;
  align-items: center;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: 32px;
  line-height: 1.35;
}
.hero p { margin: 0 0 14px; color: #d7ecec; }
.hero-card {
  background: #fff;
  color: var(--ink);
  padding: 22px 22px 18px;
  border-radius: 6px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.18);
}
.hero-card h2 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--brand-dark);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 4px;
}
.btn:hover { background: #c26116; color: #fff; }
.btn-ghost {
  display: inline-block;
  margin-left: 10px;
  color: #e8f6f6;
  font-weight: 600;
}
.hero .btn-ghost { color: var(--brand); margin-left: 0; margin-top: 10px; }
.note { font-size: 13px; color: var(--muted); margin-top: 10px; }

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 20px;
}
.scene-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: -28px auto 8px;
  max-width: 1120px;
  padding: 0 20px;
  position: relative;
}
.scene-strip article {
  background: #fff;
  padding: 16px 16px 14px;
  border-top: 3px solid var(--brand);
  box-shadow: 0 6px 18px rgba(22,51,58,0.06);
}
.scene-strip h2 { margin: 0 0 8px; font-size: 17px; }

.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.block {
  background: var(--panel);
  padding: 22px 24px;
  margin: 18px 0;
  border: 1px solid var(--line);
}
.block h2 { margin: 0 0 12px; font-size: 22px; }
.block h3 { margin: 18px 0 8px; font-size: 17px; }
ul.plain, ol.plain { margin: 8px 0 0; padding-left: 1.2em; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
th, td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
th { background: #e7f0f1; }
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.faq summary { cursor: pointer; font-weight: 650; }
.crumb { font-size: 13px; color: var(--muted); margin: 0 0 16px; }

.site-footer {
  background: #102428;
  color: #c9d6d8;
  padding: 28px 20px 36px;
  font-size: 13px;
  line-height: 1.7;
}
.site-footer .inner { max-width: 1120px; margin: 0 auto; }
.site-footer a { color: #9ad4d6; }
.site-footer .safe {
  background: #1a3538;
  padding: 12px 14px;
  margin-bottom: 14px;
}

@media (max-width: 860px) {
  .mast-inner, .hero-inner, .two, .scene-strip { grid-template-columns: 1fr; display: block; }
  .nav { flex-wrap: wrap; }
  .hero-inner { padding-top: 28px; }
}