.index-main {
  background: var(--paper, #ffffff);
  padding: 32px clamp(16px, 4vw, 48px) 56px;
}
.index-inner {
  max-width: 960px;
  margin: 0 auto;
}
.index-intro {
  margin: 0 0 24px;
  max-width: 720px;
}
.index-intro h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.2;
}
.index-intro .lede {
  margin: 0;
  color: var(--muted, #4b5563);
}
.az-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 0 0 22px;
}
.az-jump a {
  min-width: 32px;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  text-decoration: none;
  color: var(--ink, #111827);
}
.letter-block {
  margin: 0 0 24px;
}
.letter-block h2 {
  margin: 0 0 8px;
  font-size: 20px;
}
.letter-block ul {
  margin: 0;
  padding-left: 18px;
  columns: 2;
}
.letter-block li {
  margin: 0 0 6px;
  break-inside: avoid;
}
.letter-block .area {
  color: var(--muted, #4b5563);
  font-size: 13px;
}
.featured-block {
  border: 1px solid var(--line, #e5e7eb);
  border-radius: 12px;
  padding: 16px 16px 8px;
  background: var(--soft, #f8fafc);
}
.az-item--featured,
.az-item--premium {
  background: var(--sage, #f3f4f6);
  border-radius: 8px;
  padding: 4px 8px;
  margin-left: -8px;
}
@media (max-width: 700px) {
  .letter-block ul { columns: 1; }
}