.catalog-alphabet {
  max-width: 100%;
  min-width: 0;
}

.catalog-alphabet-header {
  background: var(--color-bg-box);
  border: 1px solid var(--color-box-border);
  box-shadow: var(--box-shadow-externa);
  border-radius: 12px;
  padding: 16px 18px 14px;
  margin-bottom: 12px;
  box-sizing: border-box;
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
}

.catalog-alphabet-title {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
  font-weight: 700;
  text-align: center;
  color: var(--color-text-main);
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.catalog-alphabet-count,
.catalog-alphabet-intro {
  margin: 8px 0 0;
  text-align: center;
  color: #4b5563;
  font-size: 15px;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.catalog-alphabet-letters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  background: var(--color-bg-box);
  border: 1px solid var(--color-box-border);
  box-shadow: var(--box-shadow-externa);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 12px;
}

.catalog-alphabet-letters[hidden] {
  display: none;
}

.catalog-alphabet-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 8px;
  border: 2px solid #ff8d1a79;
  border-radius: 10px;
  text-decoration: none;
  color: #22284a;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
}

.catalog-alphabet-letter:hover {
  border-color: #d97706;
  color: #111827;
}

.catalog-alphabet-letter.is-active {
  border-color: #ff8b1a;
  color: #ff8b1a;
}

.catalog-alphabet-letter.is-empty {
  opacity: 0.45;
  border-color: #d1d5db;
}

.catalog-alphabet-all {
  margin-right: 4px;
}

.catalog-alphabet-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 10px;
}

.catalog-alphabet-index-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 88px;
  text-decoration: none;
  color: inherit;
  background: var(--color-bg-box);
  border: 1px solid var(--color-box-border);
  box-shadow: var(--box-shadow-externa);
  border-radius: 12px;
}

.catalog-alphabet-index-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.14);
}

.catalog-alphabet-index-letter {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text-main);
}

.catalog-alphabet-index-count {
  font-size: 13px;
  font-weight: 600;
  color: #6b7280;
}

.catalog-alphabet-list {
  list-style: none;
  margin: 0;
  padding: 14px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px 16px;
  background: var(--color-bg-box);
  border: 1px solid var(--color-box-border);
  box-shadow: var(--box-shadow-externa);
  border-radius: 12px;
}

.catalog-alphabet-list[hidden] {
  display: none;
}

.catalog-alphabet-item {
  display: block;
  padding: 4px 0;
  text-decoration: none;
  color: var(--color-text-main);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
}

.catalog-alphabet-item:hover {
  color: #ff8b1a;
}

.catalog-alphabet-item-count {
  color: #6b7280;
  font-weight: 600;
}

.catalog-alphabet-empty {
  margin: 0;
  padding: 32px 16px;
  text-align: center;
  background: var(--color-bg-box);
  border: 1px solid var(--color-box-border);
  box-shadow: var(--box-shadow-externa);
  border-radius: 12px;
  color: #6b7280;
  font-size: 16px;
}

.catalog-alphabet-nav {
  background: var(--color-bg-box);
  border: 1px solid var(--color-box-border);
  box-shadow: var(--box-shadow-externa);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 12px;
}

.catalog-alphabet-nav-title {
  display: inline-block;
  margin: 0 10px 8px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text-main);
  text-decoration: none;
}

.catalog-alphabet-nav-title:hover {
  color: #ff8b1a;
}

.catalog-alphabet-nav-letters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.category-meta-sep {
  margin: 0 4px;
}

@media (max-width: 900px) {
  .catalog-alphabet-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .catalog-alphabet-title {
    font-size: 22px;
  }

  .catalog-alphabet-letter {
    min-width: 10px;
    height: 24px;
  }
}

@media (max-width: 520px) {
  .catalog-alphabet-list {
    grid-template-columns: 1fr;
  }
}