/* Set 5: full-bleed alternating bands, oversized type, purple */
:root {
  --violet: #4c1d95;
  --bright: #7c3aed;
  --mist: #f5f3ff;
  --ink: #1e1b4b;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #fff;
  font-size: 16px;
  line-height: 1.7;
}
.sticky {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--violet);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 28px;
}
.brand { font-weight: 800; font-size: 22px; letter-spacing: 0.06em; }
nav a {
  color: #ddd6fe;
  text-decoration: none;
  margin-left: 22px;
  font-size: 14px;
  font-weight: 600;
}
nav a.active { color: #fff; border-bottom: 2px solid #c4b5fd; padding-bottom: 4px; }
.hero {
  background: linear-gradient(120deg, #4c1d95, #6d28d9 55%, #7c3aed);
  color: #fff;
  padding: 48px 28px 56px;
}
.hero-inner { max-width: 980px; margin: 0 auto; }
.hero h1 {
  font-size: 40px;
  line-height: 1.25;
  font-weight: 800;
  margin: 8px 0 16px;
  letter-spacing: -0.02em;
}
.hero .lead { font-size: 18px; max-width: 720px; color: #ede9fe; margin-bottom: 22px; }
.btn-dl {
  display: inline-block;
  background: #fff;
  color: var(--violet);
  text-decoration: none;
  font-weight: 800;
  padding: 14px 26px;
  border-radius: 999px;
}
.btn-sub {
  display: inline-block;
  margin-left: 14px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}
.band {
  padding: 42px 28px;
}
.band:nth-child(odd) { background: var(--mist); }
.band:nth-child(even) { background: #fff; }
.band-inner { max-width: 980px; margin: 0 auto; }
h2 {
  font-size: 26px;
  margin-bottom: 12px;
  color: var(--violet);
}
.steps {
  display: flex;
  gap: 14px;
}
.steps article {
  flex: 1;
  background: #fff;
  border: 2px solid #ddd6fe;
  padding: 16px;
}
.num {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: var(--bright);
  line-height: 1;
  margin-bottom: 8px;
}
.faq-item {
  padding: 16px 0;
  border-bottom: 2px solid #ddd6fe;
}
.faq-item h3 { font-size: 17px; margin-bottom: 6px; }
p { margin-bottom: 10px; }
ul, ol { margin: 0 0 10px 1.2em; }
footer {
  background: #1e1b4b;
  color: #c4b5fd;
  padding: 28px 28px 40px;
  font-size: 13px;
  line-height: 1.8;
}
footer nav a { color: #ede9fe; margin-left: 0; margin-right: 16px; }
.note { color: #a78bfa; }
@media (max-width: 800px) {
  .hero h1 { font-size: 28px; }
  .steps { display: block; }
  .steps article { margin-bottom: 10px; }
  nav a { margin-left: 10px; }
}