/* ═══════════════════════════════════════════════════════
   创投学院 — Standalone page & homepage teaser
   ═══════════════════════════════════════════════════════ */

.academy-page-body {
  background: var(--bg-app);
  color: var(--text-primary);
}

.academy-page-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  background: var(--bg-app);
}

.navbar-academy {
  background: rgba(25, 24, 23, 0.92);
}

.academy-page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding-top: 64px;
}

.academy-masthead {
  padding: var(--space-16) var(--space-6) var(--space-8);
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
}

.academy-masthead-inner {
  max-width: 720px;
  margin: 0 auto;
}

.academy-masthead-title {
  margin: var(--space-4) 0 var(--space-4);
}

.academy-title-line {
  display: block;
  font-size: clamp(36px, 6vw, 52px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.academy-title-sub {
  display: block;
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: var(--space-2);
}

.academy-masthead-desc {
  font-size: var(--text-md);
  color: var(--text-tertiary);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.academy-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.academy-stat {
  text-align: center;
}

.academy-stat-value {
  display: block;
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.academy-stat-label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
}

.academy-ticker {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: 800px;
  margin: var(--space-8) auto 0;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  overflow: hidden;
}

.academy-ticker-label {
  flex-shrink: 0;
  position: relative;
  z-index: 2;
  padding-right: var(--space-3);
  background: var(--bg-panel);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.academy-ticker-viewport {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  position: relative;
  isolation: isolate;
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0,
    black 16px,
    black calc(100% - 16px),
    transparent 100%
  );
  mask-image: linear-gradient(
    to right,
    transparent 0,
    black 16px,
    black calc(100% - 16px),
    transparent 100%
  );
}

.academy-ticker-track {
  display: flex;
  width: max-content;
  gap: var(--space-8);
  animation: academy-ticker-scroll 50s linear infinite;
  white-space: nowrap;
  will-change: transform;
}

.academy-ticker-track a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color 0.2s;
}

.academy-ticker-track a:hover { color: var(--accent); }

.academy-ticker-dot {
  color: var(--text-tertiary);
  margin: 0 var(--space-2);
}

@keyframes academy-ticker-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.academy-page-content {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) var(--space-20);
}

.academy-filters-sticky {
  position: sticky;
  top: 64px;
  z-index: 10;
  padding: var(--space-4) 0;
  margin-bottom: var(--space-6);
  background: var(--bg-app);
}

.academy-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-8);
  align-items: start;
}

@media (max-width: 1024px) {
  .academy-layout { grid-template-columns: 1fr; }
  .academy-sidebar { order: 2; }
}

.academy-cards-magazine {
  grid-template-columns: repeat(2, 1fr);
}

.academy-card-wide {
  grid-column: 1 / -1;
  flex-direction: row;
  min-height: 200px;
}

.academy-card-wide .academy-card-cover {
  width: 44%;
  height: auto;
  min-height: 200px;
}

.academy-card-wide .academy-card-body {
  justify-content: center;
}

@media (max-width: 640px) {
  .academy-card-wide { flex-direction: column; }
  .academy-card-wide .academy-card-cover { width: 100%; height: 160px; }
}

.academy-card-cover.cover-industry {
  background: linear-gradient(135deg, #1a2a3a 0%, #2d4a6a 50%, var(--bg-elevated) 100%);
}
.academy-card-cover.cover-financing {
  background: linear-gradient(135deg, #2a1f1a 0%, #6a3d2d 50%, var(--bg-elevated) 100%);
}
.academy-card-cover.cover-legal {
  background: linear-gradient(135deg, #2a2a1a 0%, #5a5a2d 50%, var(--bg-elevated) 100%);
}
.academy-card-cover.cover-product {
  background: linear-gradient(135deg, #1a2a28 0%, #2d5a52 50%, var(--bg-elevated) 100%);
}
.academy-card-cover.cover-case {
  background: linear-gradient(135deg, #1f1a2a 0%, #4a2d6a 50%, var(--bg-elevated) 100%);
}

.academy-card-cover-label {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-mono);
}

.academy-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-2);
}

.academy-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--bg-input);
  color: var(--text-tertiary);
  border: 1px solid var(--border-subtle);
}

.academy-read-time {
  font-size: 11px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.academy-sidebar {
  position: sticky;
  top: 120px;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.academy-sidebar-block {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-panel);
}

.academy-sidebar-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

.academy-sidebar-cat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-3) 0;
  border: none;
  border-bottom: 1px solid var(--border-subtle);
  background: none;
  color: var(--text-primary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: color 0.2s;
  text-align: left;
}

.academy-sidebar-cat:last-child { border-bottom: none; }
.academy-sidebar-cat:hover { color: var(--accent); }

.academy-sidebar-cat-count {
  font-size: 11px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.academy-sidebar-item {
  display: block;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-subtle);
  text-decoration: none;
  color: inherit;
}

.academy-sidebar-item:last-child { border-bottom: none; }
.academy-sidebar-item:hover .academy-sidebar-item-title { color: var(--accent); }

.academy-sidebar-item-date {
  display: block;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.academy-sidebar-item-title {
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.45;
  color: var(--text-primary);
  transition: color 0.2s;
}

/* Homepage teaser */
.academy-teaser-section {
  position: relative;
  padding: var(--space-20) 0;
  overflow: hidden;
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.academy-teaser-inner {
  position: relative;
  z-index: 1;
}

.academy-teaser-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin: var(--space-10) 0 var(--space-8);
}

@media (max-width: 900px) {
  .academy-teaser-cards { grid-template-columns: 1fr; }
}

.academy-teaser-card {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s, transform 0.25s;
}

.academy-teaser-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.academy-teaser-cat {
  font-size: var(--text-xs);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.academy-teaser-title {
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: var(--space-2);
}

.academy-teaser-summary {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.academy-teaser-cta {
  text-align: center;
}

.academy-enter-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-accent);
  background: transparent;
  color: var(--accent);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.academy-enter-btn:hover {
  background: var(--accent-subtle);
  color: var(--accent-hover);
}

.academy-enter-arrow {
  transition: transform 0.2s;
}

.academy-enter-btn:hover .academy-enter-arrow {
  transform: translateX(3px);
}