/* ============================================
   第六届未来视听创新大赛 - 关于大赛页样式
   ============================================ */

/* --- Intro Block --- */
.about-intro {
  text-align: left;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.about-intro p {
  text-indent: 2em;
}

.about-intro p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 2;
}

/* --- Organization Cards --- */
.org-section-label {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--deep-blue);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.org-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.org-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
}

.org-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
}

.org-card .org-role {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--deep-blue);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.org-card .org-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.org-card.main-org {
  border-color: rgba(33, 150, 243, 0.2);
  background: rgba(33, 150, 243, 0.03);
}

.co-org-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.co-org-item {
  text-align: center;
  padding: 1.25rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}

.co-org-item:hover {
  color: var(--deep-blue);
  border-color: var(--border-medium);
}

/* --- Theme Showcase --- */
.theme-showcase {
  position: relative;
  padding: 4rem 2rem;
  border-radius: var(--radius-xl);
  text-align: center;
  overflow: hidden;
  background: var(--gradient-primary);
}

.theme-showcase::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 30% 50%, rgba(33, 150, 243, 0.1) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 50%, rgba(92, 107, 192, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.theme-showcase-content {
  position: relative;
  z-index: 1;
}

.theme-showcase .theme-label {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.theme-showcase .theme-text {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--text-white);
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.theme-showcase .theme-text .dot {
  color: var(--neon-cyan);
}

/* --- Design Framework --- */
.framework-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
}

.framework-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
}

.framework-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-glow);
}

.framework-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  background: rgba(33, 150, 243, 0.08);
  color: var(--deep-blue);
}

.framework-card:nth-child(2) .framework-card-icon {
  background: rgba(59, 95, 192, 0.08);
  color: var(--electric-indigo);
}

.framework-card:nth-child(3) .framework-card-icon {
  background: rgba(255, 123, 66, 0.08);
  color: var(--energy-orange);
}

.framework-card h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.framework-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.framework-divider {
  text-align: center;
  padding: 1rem;
  color: var(--deep-blue);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: 0.05em;
}

/* --- Track Detail Cards --- */
.track-detail-section {
  margin-bottom: 3.5rem;
}

.track-detail-section:last-child {
  margin-bottom: 0;
}

.track-section-header {
  margin-bottom: 2rem;
}

.track-section-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.track-section-header h3 .icon-dot {
  width: 10px;
  height: 10px;
  background: var(--deep-blue);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(26, 58, 138, 0.3);
  flex-shrink: 0;
}

.track-section-header p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.sub-track-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.sub-track-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--duration-normal) var(--ease-out);
}

.sub-track-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-3px);
}

.sub-track-card h5 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.sub-track-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.track-category-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: 2.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--deep-blue), var(--neon-cyan), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: calc(-2.5rem + 3px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep-blue);
  box-shadow: 0 0 15px rgba(26, 58, 138, 0.25);
}

.timeline-period {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--deep-blue);
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}

.timeline-content h4 {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.timeline-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Incentive Grid --- */
.incentive-section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.incentive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.incentive-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--duration-normal) var(--ease-out);
}

.incentive-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.incentive-card h5 {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.incentive-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .framework-grid {
    grid-template-columns: 1fr 1fr;
  }
  .sub-track-grid {
    grid-template-columns: 1fr 1fr;
  }
  .incentive-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .org-cards {
    grid-template-columns: 1fr;
  }
  .co-org-list {
    grid-template-columns: 1fr 1fr;
  }
  .framework-grid {
    grid-template-columns: 1fr;
  }
  .framework-divider {
    transform: rotate(90deg);
  }
  .sub-track-grid {
    grid-template-columns: 1fr;
  }
  .incentive-grid {
    grid-template-columns: 1fr;
  }
  .timeline {
    padding-left: 2rem;
  }
  .timeline-dot {
    left: calc(-2rem + 3px);
  }
}

@media (max-width: 480px) {
  .co-org-list {
    grid-template-columns: 1fr;
  }
}