:root {
  --bg: #121212;
  --panel: #1a1a1a;
  --ink: #ece6d8;
  --sub: #b0a896;
  --amber: #e8a317;
  --line: #2c2c2c;
  --rail: #161616;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "IBM Plex Sans", "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
}

a { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; }

.frame {
  display: grid;
  grid-template-columns: 1fr 280px;
  grid-template-rows: auto 1fr auto;
  max-width: 1120px;
  margin: 0 auto;
  min-height: 100vh;
}

header {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: #0e0e0e;
}

.brand {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

.nav { display: flex; list-style: none; gap: 18px; font-size: 14px; }

.nav a { color: var(--sub); }
.nav a.is-current { color: var(--amber); border-bottom: 1px solid var(--amber); padding-bottom: 2px; }

.hero {
  grid-column: 1 / 2;
  grid-row: 2;
  padding: 36px 24px 20px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, #1a1a1a 0%, #1a1a1a 54%, transparent 54%),
    linear-gradient(160deg, #2a2110 0%, #121212 70%);
}

.hero h1 { font-size: 30px; line-height: 1.3; margin-bottom: 12px; max-width: 18em; }
.hero .lead { color: var(--sub); max-width: 58ch; margin-bottom: 16px; }

.cta-row { display: flex; flex-wrap: wrap; gap: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--amber);
  color: #1a1204;
  font-weight: 800;
  padding: 9px 14px;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.btn:hover { filter: brightness(1.08); text-decoration: none; color: #1a1204; }

.btn-ghost {
  background: transparent;
  color: var(--amber);
  border: 1px solid var(--amber);
}

.note { margin-top: 12px; font-size: 12px; color: var(--sub); }

.main {
  grid-column: 1 / 2;
  grid-row: 3;
  padding: 8px 24px 48px;
}

.rail {
  grid-column: 2 / 3;
  grid-row: 2 / 4;
  border-left: 1px solid var(--line);
  background: var(--rail);
  padding: 20px 16px;
  position: sticky;
  top: 0;
  align-self: start;
  font-size: 13px;
}

.rail strong {
  display: block;
  color: var(--amber);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 11px;
  margin-bottom: 10px;
}

.rail ol { margin-left: 1.1em; color: var(--sub); }
.rail li { margin-bottom: 8px; }
.rail a { color: var(--ink); }

section {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

h2 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--amber);
}

.label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sub);
  margin-bottom: 6px;
}

p { margin-bottom: 10px; }
ul, ol { margin: 0 0 12px 1.2em; }
li { margin-bottom: 5px; }

table { width: 100%; border-collapse: collapse; margin: 10px 0 14px; font-size: 13px; }
th, td { border: 1px solid var(--line); padding: 7px 8px; text-align: left; }
th { background: #242018; color: var(--amber); }

.risk { background: #2a1810; padding: 14px 14px 6px; border: 1px solid #5a3a18; }

.faq dt { font-weight: 700; margin-top: 12px; color: var(--amber); }
.faq dd { margin: 4px 0 0; color: var(--sub); }

footer {
  grid-column: 1 / -1;
  background: #0a0a0a;
  color: var(--sub);
  padding: 22px 24px 32px;
  font-size: 12px;
  line-height: 1.7;
  border-top: 1px solid var(--line);
}

footer p { margin-bottom: 6px; }

@media (max-width: 900px) {
  .frame { display: block; }
  .rail { position: static; border-left: 0; border-top: 1px solid var(--line); }
  .hero h1 { font-size: 24px; }
}