:root {
  --ink: #172433;
  --muted: #607080;
  --paper: #f5f7f8;
  --card: #ffffff;
  --navy: #12324a;
  --teal: #0f766e;
  --teal-soft: #e8f5f2;
  --blue-soft: #eaf2f8;
  --gold: #b7791f;
  --gold-soft: #fff6df;
  --red: #a33a35;
  --red-soft: #fff0ef;
  --green: #217a45;
  --green-soft: #edf8f1;
  --line: #dce4e8;
  --shadow: 0 14px 40px rgba(18, 50, 74, .10);
  --radius: 18px;
}
.muted { color: var(--muted); }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}
a { color: #0b6a8c; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--teal); }
button { font: inherit; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 247, 248, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(18, 50, 74, .08);
}
.topbar-inner {
  max-width: 1220px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.brand { font-weight: 800; color: var(--navy); letter-spacing: .02em; }
.top-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--navy);
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}
.btn.primary { background: var(--navy); color: white; border-color: var(--navy); }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(18,50,74,.10); }

.hero {
  background:
    radial-gradient(circle at 86% 12%, rgba(79, 183, 168, .22), transparent 24rem),
    linear-gradient(135deg, #0f2d43 0%, #16495a 66%, #0f766e 100%);
  color: #fff;
  padding: 72px 24px 66px;
}
.hero-inner { max-width: 1140px; margin: 0 auto; }
.eyebrow { font-size: 13px; letter-spacing: .16em; text-transform: uppercase; font-weight: 800; opacity: .84; }
.hero h1 { margin: 10px 0 14px; font-size: clamp(34px, 6vw, 64px); line-height: 1.08; letter-spacing: -.03em; max-width: 1000px; }
.hero p { max-width: 820px; font-size: 18px; color: rgba(255,255,255,.86); margin: 0; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.22); font-size: 14px; }

.page-shell { max-width: 1220px; margin: 0 auto; padding: 30px 24px 80px; display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 28px; }
.toc { position: sticky; top: 82px; align-self: start; background: white; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: 0 8px 28px rgba(18,50,74,.06); max-height: calc(100vh - 108px); overflow: auto; }
.toc strong { color: var(--navy); display: block; margin-bottom: 8px; }
.toc a { display: block; color: var(--muted); text-decoration: none; padding: 6px 8px; border-radius: 8px; font-size: 14px; }
.toc a.active, .toc a:hover { background: var(--teal-soft); color: var(--teal); font-weight: 700; }
.content { min-width: 0; }
.section { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(22px, 4vw, 38px); margin-bottom: 22px; box-shadow: 0 10px 32px rgba(18,50,74,.055); }
.section h2 { color: var(--navy); font-size: clamp(25px, 3vw, 34px); line-height: 1.25; margin: 0 0 8px; letter-spacing: -.02em; }
.section h3 { color: var(--navy); font-size: 20px; line-height: 1.4; margin: 28px 0 10px; }
.section h4 { color: var(--teal); font-size: 17px; margin: 22px 0 8px; }
.section-lead { color: var(--muted); margin-top: 0; font-size: 17px; }
.section-number { color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.big-decision { background: linear-gradient(135deg, #eef8f6, #f7fbfa); border-left: 6px solid var(--teal); padding: 20px 22px; border-radius: 14px; font-size: 19px; }
.big-decision strong { color: var(--navy); }

.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { border: 1px solid var(--line); border-radius: 14px; padding: 18px; background: #fff; }
.card h3, .card h4 { margin-top: 0; }
.card .metric { font-size: 30px; line-height: 1.1; font-weight: 900; color: var(--navy); }
.card .label { color: var(--muted); font-size: 14px; }
.card.primary { border-color: #90cfc3; background: var(--teal-soft); }
.card.warn { border-color: #eed59b; background: var(--gold-soft); }
.card.risk { border-color: #efb7b2; background: var(--red-soft); }
.card.good { border-color: #b5dec4; background: var(--green-soft); }

.callout { border-radius: 14px; padding: 16px 18px; margin: 16px 0; border: 1px solid; }
.callout.info { background: var(--blue-soft); border-color: #c7dce9; }
.callout.good { background: var(--green-soft); border-color: #bddfc9; }
.callout.warn { background: var(--gold-soft); border-color: #ecd79f; }
.callout.risk { background: var(--red-soft); border-color: #edbeb9; }
.callout-title { display: block; font-weight: 850; color: var(--navy); margin-bottom: 4px; }

.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; border-collapse: collapse; min-width: 680px; background: #fff; }
th, td { padding: 13px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { background: #edf3f6; color: var(--navy); font-size: 14px; }
tr:last-child td { border-bottom: 0; }
.rank-1 { color: var(--green); font-weight: 850; }
.rank-2 { color: var(--gold); font-weight: 850; }
.rank-3 { color: var(--red); font-weight: 850; }

.pathway { display: grid; grid-template-columns: repeat(5, minmax(130px, 1fr)); gap: 10px; margin: 20px 0; }
.path-node { position: relative; border: 1px solid var(--line); border-radius: 14px; padding: 16px; background: #fff; min-height: 134px; }
.path-node:not(:last-child)::after { content: "→"; position: absolute; right: -13px; top: 48%; color: var(--teal); font-weight: 900; z-index: 2; }
.path-node .step { display: block; color: var(--teal); font-weight: 800; font-size: 13px; }
.path-node strong { display: block; color: var(--navy); margin: 6px 0; }

.ladder { display: grid; gap: 10px; }
.ladder-row { display: grid; grid-template-columns: 150px 1fr 100px; gap: 14px; align-items: center; padding: 12px 14px; border-radius: 12px; background: #f7f9fa; border: 1px solid var(--line); }
.bar { height: 10px; border-radius: 999px; background: #e4ebee; overflow: hidden; }
.bar > span { display: block; height: 100%; background: linear-gradient(90deg, var(--teal), #4fb7a8); border-radius: inherit; }

.timeline { position: relative; margin: 18px 0 0 12px; padding-left: 30px; border-left: 2px solid #b8d6d1; }
.time-item { position: relative; margin: 0 0 24px; }
.time-item::before { content: ""; position: absolute; width: 14px; height: 14px; left: -38px; top: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 5px var(--teal-soft); }
.time-item h3 { margin: 0 0 6px; }

.script { background: #102f43; color: #eff8fb; border-radius: 14px; padding: 18px 20px; margin: 12px 0; position: relative; }
.script p { margin: 0; white-space: pre-line; }
.script .copy { position: absolute; top: 10px; right: 10px; border: 1px solid rgba(255,255,255,.25); background: rgba(255,255,255,.1); color: #fff; border-radius: 8px; padding: 5px 8px; font-size: 12px; cursor: pointer; }
.answer { border-left: 4px solid var(--teal); padding: 12px 16px; background: #f7fbfa; margin: 12px 0; }
.answer b { color: var(--navy); }
.question { border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin: 14px 0; }
.question > summary { cursor: pointer; font-weight: 850; color: var(--navy); list-style: none; }
.question > summary::-webkit-details-marker { display: none; }
.question > summary::before { content: "+"; display: inline-grid; place-items: center; width: 24px; height: 24px; margin-right: 8px; border-radius: 50%; background: var(--teal-soft); color: var(--teal); }
.question[open] > summary::before { content: "−"; }

.checklist { list-style: none; padding: 0; margin: 12px 0; }
.checklist li { position: relative; padding: 7px 0 7px 30px; }
.checklist li::before { content: "□"; position: absolute; left: 2px; top: 5px; color: var(--teal); font-size: 19px; font-weight: 700; }
.tight li { margin-bottom: 4px; }
.tag { display: inline-block; padding: 3px 9px; border-radius: 999px; background: #edf3f6; color: #35576b; font-size: 13px; font-weight: 700; margin: 2px 4px 2px 0; }
.tag.green { background: var(--green-soft); color: var(--green); }
.tag.gold { background: var(--gold-soft); color: #855e12; }
.tag.red { background: var(--red-soft); color: var(--red); }

.sources { font-size: 14px; color: var(--muted); }
.sources li { margin-bottom: 8px; }
.footer { max-width: 1140px; margin: 0 auto; padding: 10px 24px 50px; color: var(--muted); font-size: 14px; }
.doc-grid { max-width: 1140px; margin: -35px auto 0; position: relative; padding: 0 24px 70px; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.doc-card { background: white; border-radius: 18px; padding: 24px; border: 1px solid var(--line); box-shadow: var(--shadow); text-decoration: none; color: var(--ink); transition: .2s ease; }
.doc-card:hover { transform: translateY(-3px); color: var(--ink); }
.doc-card .n { font-size: 13px; font-weight: 850; color: var(--teal); letter-spacing: .12em; }
.doc-card h2 { color: var(--navy); margin: 6px 0; }
.doc-card p { color: var(--muted); margin: 0; }

@media (max-width: 980px) {
  .page-shell { grid-template-columns: 1fr; }
  .toc { position: static; max-height: none; }
  .pathway { grid-template-columns: 1fr; }
  .path-node:not(:last-child)::after { content: "↓"; right: auto; left: 50%; top: auto; bottom: -18px; }
  .grid.four { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 680px) {
  body { font-size: 15px; }
  .topbar-inner { padding: 10px 14px; }
  .brand { max-width: 55%; font-size: 14px; }
  .hero { padding: 50px 18px 48px; }
  .hero h1 { font-size: 38px; }
  .page-shell { padding: 20px 14px 60px; }
  .section { padding: 22px 18px; }
  .grid.two, .grid.three, .grid.four, .doc-grid { grid-template-columns: 1fr; }
  .doc-grid { padding: 0 14px 60px; }
  .ladder-row { grid-template-columns: 1fr; gap: 6px; }
}

@media print {
  body { background: #fff; font-size: 11pt; color: #111; }
  .topbar, .toc, .copy { display: none !important; }
  .hero { background: #fff !important; color: #111; padding: 10mm 0 8mm; }
  .hero p, .eyebrow { color: #444; }
  .hero-meta .pill { color: #111; border-color: #ccc; }
  .page-shell { display: block; max-width: none; padding: 0; }
  .section { box-shadow: none; border: 0; padding: 0; margin-bottom: 10mm; break-inside: auto; }
  .card, .question, .callout, .path-node { break-inside: avoid; }
  a { color: #111; text-decoration: none; }
  .footer { padding: 0; }
}