:root {
  --ink: #111111;
  --paper: #fafafa;
  --line: #d4d4d4;
  --mute: #525252;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Georgia, "Songti SC", "SimSun", "Times New Roman", serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
}
.wrap { width: min(1040px, calc(100% - 36px)); margin: 0 auto; }
.mast {
  background: var(--ink);
  color: #fff;
}
.mast-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { color: #fff; text-decoration: none; font-weight: 700; font-family: "Segoe UI", sans-serif; }
nav { display: flex; flex-wrap: wrap; gap: 14px; font-family: "Segoe UI", sans-serif; font-size: 14px; }
nav a { color: #e5e5e5; text-decoration: none; }
nav a:hover { color: #fff; }
.hero { padding: 48px 0 24px; border-bottom: 2px solid var(--ink); }
.meta { margin: 0 0 8px; letter-spacing: 0.08em; font-size: 12px; text-transform: uppercase; font-family: "Segoe UI", sans-serif; }
.hero h1 { margin: 0 0 14px; font-size: clamp(28px, 4vw, 40px); line-height: 1.25; }
.hero p { margin: 0; max-width: 42em; }
.block { padding: 44px 0; }
h2 { margin: 0 0 14px; font-size: 26px; }
h3 { margin: 8px 0; font-size: 18px; }
p { margin: 0 0 12px; }
.band { padding: 36px 0 0; }
.risk {
  background: var(--ink);
  color: #fafafa;
  padding: 22px 0;
  border-top: 1px solid #333;
}
.risk.alt { background: #1a1a1a; }
.risk-row {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  align-items: start;
}
.risk svg { width: 48px; height: 48px; }
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 20px;
  border: 2px solid var(--ink);
}
.pane { padding: 20px; background: #fff; }
.pane.dark { background: var(--ink); color: #fafafa; }
.pane svg { width: 40px; height: 40px; }
.exit-ol { list-style: none; margin: 20px 0 0; padding: 0; }
.exit-ol li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.exit-ol span {
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  font-family: "Segoe UI", sans-serif;
}
.remain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}
.remnant {
  background: #fff;
  border: 1px solid var(--ink);
  border-left: 8px solid var(--ink);
  padding: 16px;
}
.remnant svg { width: 36px; height: 36px; }
.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.faq dt { font-weight: 700; margin: 18px 0 6px; font-family: "Segoe UI", sans-serif; }
.faq dd { margin: 0 0 8px; padding: 12px 0; border-bottom: 1px solid var(--line); }
footer {
  background: var(--ink);
  color: #d4d4d4;
  padding: 28px 0;
  font-size: 14px;
  font-family: "Segoe UI", sans-serif;
}
footer p { margin: 0 0 8px; }
@media (max-width: 860px) {
  .split, .remain-grid, .cols-2 { grid-template-columns: 1fr; }
}