/* Set 4 — cn: full-bleed green band, four-cell matrix, wide tables */
:root {
  --green: #166534;
  --leaf: #15803d;
  --ink: #14532d;
  --muted: #3f6212;
  --bg: #f3f4f6;
  --card: #ffffff;
  --line: #bbf7d0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: Arial, "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: #1a2e1c;
  line-height: 1.7;
  font-size: 16px;
}
a { color: var(--leaf); }
.band {
  background: var(--green);
  color: #ecfdf5;
}
.band-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 24px;
}
.brand {
  font-weight: 800;
  font-size: 22px;
  display: flex;
  gap: 8px;
  align-items: center;
  color: #fff;
}
.brand svg { width: 30px; height: 30px; }
.band nav ul { display: flex; list-style: none; gap: 4px; }
.band nav a {
  color: #d1fae5;
  text-decoration: none;
  padding: 8px 14px;
  font-weight: 700;
  font-size: 14px;
}
.band nav a.is-on { background: #14532d; color: #fff; }
.hero-band {
  padding: 40px 24px 48px;
  max-width: 1280px;
  margin: 0 auto;
}
.hero-band h1 { font-size: 32px; max-width: 18em; margin: 8px 0 14px; }
.hero-band p { max-width: 52em; color: #bbf7d0; }
.actions { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 10px; }
.act {
  background: #facc15;
  color: #14532d;
  font-weight: 800;
  padding: 12px 18px;
  text-decoration: none;
}
.act.plain { background: transparent; color: #fff; border: 1px solid #86efac; }
.canvas { max-width: 1280px; margin: 0 auto; padding: 28px 24px 60px; }
.matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 8px 0 24px;
}
.cell {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 16px;
  min-height: 160px;
}
.cell svg { width: 24px; height: 24px; color: var(--leaf); }
.cell h3 { margin: 8px 0; color: var(--green); font-size: 16px; }
.slab {
  background: var(--card);
  border: 1px solid #d1d5db;
  padding: 24px;
  margin-bottom: 18px;
}
.slab h2 {
  color: var(--green);
  font-size: 22px;
  margin-bottom: 12px;
  border-left: 6px solid var(--leaf);
  padding-left: 10px;
}
table.wide { width: 100%; border-collapse: collapse; font-size: 15px; }
table.wide th, table.wide td { border: 1px solid #d1d5db; padding: 10px; text-align: left; }
table.wide th { background: #dcfce7; color: var(--green); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
.faq-grid dt { font-weight: 700; margin-top: 12px; }
.faq-grid dd { color: #3f3f46; margin: 6px 0 0; }
.base {
  background: #14532d;
  color: #bbf7d0;
  padding: 28px 24px;
  font-size: 14px;
}
.base .in { max-width: 1280px; margin: 0 auto; }
.base p { margin-bottom: 8px; }
@media (max-width: 1000px) {
  .matrix { grid-template-columns: 1fr 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .matrix { grid-template-columns: 1fr; }
  .band-top { flex-direction: column; align-items: flex-start; gap: 8px; }
}