:root {
  --slate: #475569;
  --slate-deep: #334155;
  --sky: #0ea5e9;
  --bg: #f1f5f9;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
}
.wrap { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.topbar {
  background: #e2e8f0;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}
.mast {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.bar-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  flex-wrap: wrap;
}
.mast .bar-flex { min-height: 58px; }
.chip {
  background: var(--slate);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
}
.chip.ghost { background: transparent; color: var(--slate); border: 1px solid #cbd5e1; }
.brand { font-weight: 700; color: var(--slate-deep); text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 10px 14px; }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
nav a:hover { color: var(--sky); }
.hero { padding: 32px 0 8px; }
.hero h1 { margin: 0 0 10px; font-size: clamp(26px, 4vw, 34px); }
.hero p { margin: 0; max-width: 48em; }
.block { padding: 36px 0; }
h2 { margin: 0 0 12px; font-size: 22px; }
h3 { margin: 6px 0; font-size: 16px; }
p { margin: 0 0 12px; }
.kpi-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 16px;
}
.kpi {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 14px;
  border-radius: 8px;
}
.kpi svg { width: 32px; height: 32px; color: var(--sky); }
.stage-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: start;
}
.list-stage {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}
.stage-head {
  background: var(--slate);
  color: #fff;
  padding: 10px 12px;
  font-size: 13px;
}
.row {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.row.pin { background: #e0f2fe; }
.row.dim { color: var(--muted); }
.row i { font-style: normal; font-size: 12px; color: var(--muted); }
.dot, .num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.dot { background: #cbd5e1; }
.dot.sky { background: var(--sky); }
.dot.faint { background: #e2e8f0; }
.num { background: var(--sky); color: #fff; font-size: 11px; }
.slab {
  background: var(--slate-deep);
  color: #e2e8f0;
  padding: 40px 0;
}
.slab.alt { background: #1e293b; }
.slab h2, .slab p { color: #f8fafc; }
.slab p { color: #cbd5e1; }
.slab-icon svg { width: 40px; height: 40px; color: var(--sky); }
.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.cols-2 article {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 16px;
  border-radius: 8px;
}
.flow { list-style: none; margin: 16px 0 0; padding: 0; }
.flow li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed #cbd5e1;
}
.flow span {
  font-weight: 700;
  color: var(--sky);
  font-size: 20px;
}
.faq dt { font-weight: 700; margin: 16px 0 6px; }
.faq dd {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 12px;
  border-radius: 6px;
}
footer {
  background: var(--slate);
  color: #e2e8f0;
  padding: 28px 0;
  font-size: 14px;
}
footer p { margin: 0 0 8px; }
@media (max-width: 960px) {
  .kpi-4, .stage-grid, .cols-2 { grid-template-columns: 1fr; }
}