/* =========================================================
   系列落地页 — 智算互联
   Using the same glass-morphism design language as main site
   ========================================================= */

.series-hero {
  margin-bottom: 40px;
  padding: 20px 0;
}

.series-hero-kicker {
  font-size: 0.75em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 12px 0;
}

.series-hero-title {
  font-size: 1.6em;
  font-weight: 700;
  color: var(--text-primary) !important;
  margin: 0 0 16px 0;
  line-height: 1.3;
  letter-spacing: -0.02em;
  text-shadow: 0 1px 2px var(--shadow-inset);
}

.series-hero-desc {
  font-size: 0.92em;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 16px 0;
  max-width: 680px;
}

.series-hero-meta {
  font-size: 0.82em;
  color: var(--text-muted);
  display: flex;
  gap: 8px;
  align-items: center;
}

/* --- Series article cards --- */
.series-btn {
  display: inline-flex;
  align-items: center;
  padding: 6px 18px;
  background: var(--surface-soft) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--accent) !important;
  border: 1px solid var(--border-subtle) !important;
  border-radius: 50px;
  font-size: 0.85em;
  font-weight: 500;
  text-decoration: none !important;
  box-shadow: 0 4px 10px var(--shadow);
  transition: all 0.25s;
  margin-top: 12px;
}

.series-btn:hover {
  background: var(--surface-card) !important;
  color: var(--accent-strong) !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--shadow-strong);
  border-color: var(--border) !important;
}

/* --- Footer note --- */
.series-footer-note {
  margin-top: 48px;
  padding: 20px 24px;
  background: var(--surface-soft) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle) !important;
  border-radius: 10px;
  box-shadow: 0 4px 16px var(--shadow);
}

.series-footer-note p {
  font-size: 0.85em;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 8px 0;
}

.series-footer-note code {
  background: var(--inline-code-bg) !important;
  border: 1px solid var(--inline-code-border) !important;
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--inline-code-text) !important;
  font-size: 0.87em;
}

/* --- Series intra-navigation (for post footers) --- */
.series-nav {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  margin: 32px 0 24px;
}

.series-nav--single {
  justify-content: center;
}

.series-nav--both {
  justify-content: space-between;
}

.series-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 16px;
  background: var(--surface-soft) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle) !important;
  border-radius: 50px;
  font-size: 0.85em;
  font-weight: 500;
  color: var(--accent) !important;
  text-decoration: none !important;
  border-bottom: none !important;
  transition: all 0.2s;
  white-space: nowrap;
}

.series-nav__link:hover {
  background: var(--surface-card) !important;
  color: var(--accent-strong) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow);
}

@media (max-width: 767px) {
  .series-nav {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .series-hero-title {
    font-size: 1.3em;
  }
}