/* 主站（hub）专属样式。设计变量与基础组件全部来自 channels 复用的 style.css，
   这里只补主站独有的「频道卡片」与品牌行，避免两边各写一套。 */

.brand {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--brand);
  font-weight: 600;
}

.channels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.ch {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s ease, transform .15s ease;
}

a.ch:hover,
a.ch:focus-visible {
  border-color: var(--brand);
  transform: translateY(-1px);
  outline: none;
}

.ch h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ch .tag {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--ok-soft);
  color: var(--ok);
  font-size: 11px;
  font-weight: 500;
}

.ch .tag.soon {
  background: var(--warn-soft);
  color: var(--warn);
}

.ch .ch-lead {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 500;
}

.ch .ch-desc {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--muted);
}

.ch .ch-meta {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.ch.disabled {
  opacity: .7;
  cursor: default;
}

.faq details {
  border-top: 1px solid var(--line);
  padding: 10px 0;
}

.faq details:first-of-type {
  border-top: 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
}

.faq summary::marker {
  color: var(--muted);
}

.faq details p {
  margin: 8px 0 2px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

@media (max-width: 560px) {
  .site h1 { font-size: 21px; }
  .ch { padding: 15px; }
}