* { box-sizing: border-box; }
body {
  margin: 0;
  background: #fff7ed;
  color: #111827;
  font: 14px/1.7 "Arial", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
.strip {
  height: 48px;
  background: #111827;
  color: #ecfdf5;
  display: flex;
  align-items: center;
  padding: 0 24px;
}
.strip .who {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #5eead4;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.strip nav { margin-left: auto; }
.strip nav a {
  color: #d1fae5;
  text-decoration: none;
  margin-left: 20px;
  font-size: 13px;
}
.strip nav a.is-current { color: #f59e0b; }
.canvas { max-width: 1280px; margin: 0 auto; padding: 24px 20px 48px; }
.chooser {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  background: #0f766e;
  color: #ecfdf5;
  padding: 24px;
}
.chooser h1 { font-size: 30px; margin: 0 0 10px; }
.chooser .btns a {
  display: block;
  background: #111827;
  color: #fde68a;
  text-decoration: none;
  padding: 9px 10px;
  margin-bottom: 6px;
  border-radius: 0;
}
.tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 20px 0;
}
.tiles article {
  background: #fff;
  padding: 12px;
  border: 2px solid #0f766e;
}
.tiles h2 { font-size: 15px; margin: 0 0 8px; color: #0f766e; }
.matrix { width: 100%; border-collapse: collapse; background: #fff; margin: 16px 0; }
.matrix th, .matrix td { border: 1px solid #99f6e4; padding: 8px; text-align: left; }
.matrix th { background: #0f766e; color: #fff; }
.block { background: #fff; padding: 16px 18px; margin: 14px 0; border-left: 8px solid #111827; }
.block h2 { margin-top: 0; font-size: 18px; }
.hazard {
  background: #111827;
  color: #fde68a;
  padding: 14px 16px;
}
.site-end {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  background: #111827;
  color: #d1d5db;
  padding: 20px 24px 28px;
  font-size: 12px;
}
.site-end p { margin: 0; }
.site-end .wide { grid-column: 1 / -1; }

@media (max-width: 1000px) {
  .tiles { grid-template-columns: 1fr 1fr; }
  .chooser, .site-end { grid-template-columns: 1fr; }
}