:root {
  --ink: #111827;
  --amber: #d97706;
  --sand: #fff7ed;
  --line: #fbbf24;
  --deep: #0b1220;
  --card: #1f2937;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font: 16px/1.7 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--ink);
  color: #f8fafc;
}
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 28px;
  background: var(--deep);
  border-bottom: 3px solid var(--amber);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: #fbbf24;
}
.brand svg { color: #fbbf24; }
nav { display: flex; gap: 16px; flex-wrap: wrap; }
nav a {
  color: #fde68a;
  text-decoration: none;
  font-size: 14px;
}
nav a:hover { color: #fff; }
.hero {
  padding: 56px 28px 72px;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
}
.hero h1 {
  font-size: 32px;
  line-height: 1.35;
  max-width: 920px;
  margin-bottom: 16px;
}
.hero p,
.lead { max-width: 860px; margin-bottom: 12px; }
.zz-ink {
  background: var(--ink);
  color: #f8fafc;
  padding: 56px 28px 64px;
}
.zz-amber {
  background: linear-gradient(165deg, var(--amber) 0%, #b45309 100%);
  color: #111827;
  padding: 56px 28px 64px;
  clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
}
.zz-amber h2,
.zz-amber h3,
.zz-amber p,
.zz-amber strong { color: #111827; }
.zz-amber .card,
.zz-amber .stat,
.zz-amber .cmp article {
  background: var(--sand);
  color: #111827;
}
.zz-ink + .zz-amber,
.zz-amber + .zz-ink { margin-top: -28px; }
h2 { font-size: 24px; margin-bottom: 12px; }
h3 { font-size: 18px; margin: 8px 0; }
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 20px;
}
.stat {
  background: var(--card);
  padding: 20px;
  border-radius: 4px;
  border-top: 6px solid var(--amber);
  transform: skewY(-2deg);
}
.stat > * { transform: skewY(2deg); }
.stat b {
  display: block;
  font-size: 64px;
  line-height: 1;
  color: #fbbf24;
}
.stat:hover { border-top-color: #fde68a; }
.cards3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 18px;
}
.card {
  background: var(--card);
  padding: 18px;
  border-radius: 8px;
}
.card svg { color: #fbbf24; }
.card:hover { box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25); }
.cmp {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}
.cmp article {
  background: var(--sand);
  padding: 18px;
  border-left: 6px solid #111827;
}
.steps { list-style: none; display: grid; gap: 12px; margin-top: 16px; }
.steps li {
  display: flex;
  gap: 12px;
  background: var(--sand);
  padding: 14px;
  border-radius: 8px;
}
.steps span {
  flex: 0 0 36px;
  height: 36px;
  border-radius: 50%;
  background: #111827;
  color: #fbbf24;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.limit .card { border-bottom: 4px solid var(--amber); }
.faq details {
  background: var(--sand);
  margin: 10px 0;
  padding: 12px 16px;
  border-radius: 8px;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin-top: 8px; }
.faq details[open] { border-left: 4px solid #111827; }
.site-footer {
  padding: 28px;
  background: var(--deep);
  color: #d1d5db;
  font-size: 13px;
}
.site-footer p { margin: 6px 0; }
@media (max-width: 800px) {
  .stats,
  .cards3,
  .cmp { grid-template-columns: 1fr; }
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .hero h1 { font-size: 24px; }
  .zz-amber { clip-path: none; }
  .stat b { font-size: 48px; }
}