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

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  overflow: hidden;
  background: var(--gradient-hero);
}

/* Hero 全屏背景图片 (bg1.jpg) — 电影级推出镜头 */
.hero-bg-img {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url('../img/bg1.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 1;
  transform-origin: 55% 60%;
  animation: heroDollyOut 16s cubic-bezier(0.25, 0.1, 0.1, 1) infinite alternate;
}

@keyframes heroDollyOut {
  0% { transform: scale(1.25) translate(-2.5%, -4%); }
  100% { transform: scale(1.0) translate(0, 0); }
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: 
    radial-gradient(ellipse at 30% 20%, rgba(33, 150, 243, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(92, 107, 192, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(26, 58, 138, 0.03) 0%, transparent 50%),
    linear-gradient(to bottom, rgba(240, 244, 250, 0.08) 0%, transparent 30%, transparent 70%, rgba(240, 244, 250, 0.12) 100%);
  pointer-events: none;
}

/* --- Floating Light Orbs --- */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  animation: orbFloat var(--orb-duration, 12s) ease-in-out infinite,
             orbFade var(--orb-fade, 8s) ease-in-out infinite;
  animation-delay: var(--orb-delay, 0s);
}

.hero-orb--cyan {
  width: clamp(260px, 30vw, 440px);
  height: clamp(260px, 30vw, 440px);
  background: rgba(33, 150, 243, 0.07);
  top: 10%;
  left: -5%;
  --orb-duration: 14s;
  --orb-fade: 7s;
}

.hero-orb--purple {
  width: clamp(220px, 26vw, 380px);
  height: clamp(220px, 26vw, 380px);
  background: rgba(92, 107, 192, 0.06);
  top: 50%;
  right: -8%;
  --orb-duration: 16s;
  --orb-fade: 9s;
  --orb-delay: 2s;
}

.hero-orb--indigo {
  width: clamp(180px, 22vw, 320px);
  height: clamp(180px, 22vw, 320px);
  background: rgba(26, 58, 138, 0.05);
  bottom: 5%;
  left: 30%;
  --orb-duration: 13s;
  --orb-fade: 8s;
  --orb-delay: 4s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(4%, -6%) scale(1.12); }
  50% { transform: translate(-2%, 8%) scale(0.94); }
  75% { transform: translate(-5%, -3%) scale(1.08); }
}

@keyframes orbFade {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.7; }
}

/* --- Light Sweep --- */
.hero-light-sweep {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

.hero-light-sweep::after {
  content: '';
  position: absolute;
  top: -150%;
  left: -150%;
  width: 300%;
  height: 300%;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(33, 150, 243, 0.03) 45%,
    rgba(92, 107, 192, 0.04) 50%,
    rgba(33, 150, 243, 0.03) 55%,
    transparent 60%
  );
  animation: lightSweep 8s linear infinite;
}

@keyframes lightSweep {
  0% { transform: translate(-30%, 30%); }
  100% { transform: translate(30%, -30%); }
}

/* --- Enhanced Title Glow --- */
.hero .hero-title {
  animation: titleGlow 4s ease-in-out infinite;
}

@keyframes titleGlow {
  0%, 100% { text-shadow: 0 2px 12px rgba(26, 58, 138, 0.08), 0 0 40px rgba(33, 150, 243, 0); }
  50% { text-shadow: 0 2px 12px rgba(26, 58, 138, 0.08), 0 0 40px rgba(33, 150, 243, 0.12); }
}

/* --- Info Box Border Glow --- */
.hero-info-box {
  position: relative;
  overflow: hidden;
}

/* Enhanced Badge Pulse */
.hero-badge {
  animation: badgePulseEnhanced 3s ease-in-out infinite;
}

@keyframes badgePulseEnhanced {
  0%, 100% { 
    box-shadow: 0 0 0 0 rgba(33, 150, 243, 0.25);
    border-color: rgba(33, 150, 243, 0.3);
  }
  50% { 
    box-shadow: 0 0 18px 4px rgba(33, 150, 243, 0.08), 0 0 0 6px rgba(33, 150, 243, 0);
    border-color: rgba(33, 150, 243, 0.6);
  }
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 520px;
  padding: 2rem;
  text-align: center;
  align-self: flex-end;
  justify-self: flex-end;
  margin-left: auto;
}

/* Hero 信息包裹 */
.hero-info-box {
  padding: 1.5rem 2rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(26, 58, 138, 0.1);
  text-align: center;
}

.hero-info-box .hero-badge {
  margin-bottom: 0.5rem;
}

.hero-info-box .hero-subtitle {
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}

.hero-info-box .hero-date {
  margin-bottom: 1.5rem;
}

.hero-info-box .hero-actions {
  justify-content: center;
}

.hero-organizer {
  margin-top: 1.25rem;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(26, 58, 138, 0.1);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.hero .hero-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--deep-blue);
  letter-spacing: 0.04em;
  text-shadow: none;
  margin: 0;
  line-height: 1.3;
}

/* Hero 主视觉装饰 (bT.png) */
.hero-main-visual {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  width: min(60%, 600px);
  opacity: 0.8;
  pointer-events: none;
  animation: 
    heroVisualEntrance 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards,
    heroVisualFloat 6s ease-in-out 0.8s infinite;
}

@keyframes heroVisualEntrance {
  0% { transform: translate(calc(-50% + 120vw), -50%); opacity: 0; }
  100% { transform: translate(-50%, -50%); opacity: 0.8; }
}

.hero-main-visual img {
  width: 100%;
  height: auto;
  display: block;
}

@keyframes heroVisualFloat {
  0%, 100% { transform: translate(-50%, -50%) translateY(0); }
  50% { transform: translate(-50%, -50%) translateY(-12px); }
}

@media (max-width: 768px) {
  .hero {
    justify-content: center;
  }
  .hero-content {
    margin-left: 0;
    margin-right: 0;
  }
  .hero-main-visual {
    width: min(85%, 400px);
    opacity: 0.7;
  }
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 1.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--deep-blue);
  border: 1px solid rgba(26, 58, 138, 0.2);
  border-radius: var(--radius-full);
  background: rgba(26, 58, 138, 0.05);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(33, 150, 243, 0.2); }
  50% { box-shadow: 0 0 0 12px rgba(33, 150, 243, 0); }
}

.hero-logo-area {
  margin-bottom: 2.5rem;
  animation: logoEntrance 1.2s var(--ease-out) forwards;
}

@keyframes logoEntrance {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.hero-logo-area img {
  height: 76px;
  width: auto;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 4rem);
  font-weight: 900;
  color: var(--deep-blue);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero h1 .gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-primary);
  text-shadow: none;
  margin-bottom: 1rem;
  letter-spacing: 0.08em;
  font-weight: 400;
}

.hero-date {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.5rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--deep-blue);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-full);
  border: 1px solid rgba(26, 58, 138, 0.15);
  text-shadow: none;
  margin-bottom: 2.5rem;
  white-space: nowrap;
}

.hero-date::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--neon-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--neon-cyan);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-indicator .scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Intro Section (News Slide Card) --- */
.intro-section {
  padding: var(--section-gap) 2rem;
  position: relative;
  overflow: hidden;
}

.intro-section::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(33, 150, 243, 0.04) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}

.news-slider-wrapper {
  max-width: 960px;
  margin: 0 auto;
}

.news-slider-track {
  position: relative;
}

.news-slide-card {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  overflow: hidden;
  border-radius: var(--radius-xl);
  box-shadow: 0 32px 96px rgba(26, 58, 138, 0.28), 0 16px 48px rgba(0, 0, 0, 0.15);
  background: var(--text-white);
  transition: opacity 0.6s ease, box-shadow var(--duration-normal) var(--ease-out);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  pointer-events: none;
  z-index: 1;
}

.news-slide-card.active {
  position: relative;
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
}

.news-slide-card:hover {
  box-shadow: 0 40px 120px rgba(26, 58, 138, 0.34), 0 20px 60px rgba(0, 0, 0, 0.18);
}

.news-slide-image {
  position: relative;
  overflow: hidden;
  height: 0;
  padding-bottom: 75%; /* 4:3 ratio */
  align-self: start;
}

.news-slide-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-slow) var(--ease-out);
}

.news-slide-card.active:hover .news-slide-image img {
  transform: scale(1.06);
}



.news-slide-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.5rem 2rem;
  background: linear-gradient(135deg, #1A3A8A 0%, #2D5FBD 50%, #3B6FD0 100%);
  color: var(--text-white);
  position: relative;
}

.news-slide-body::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.news-slide-meta {
  margin-bottom: 0.5rem;
}

.news-slide-date {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

.news-slide-body h2 {
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  color: var(--text-white);
}

.news-slide-body p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 0.75rem;
}

.news-slide-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.news-slide-actions .btn-subtle {
  padding: 0.35rem 0;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.55);
  background: transparent;
  border: none;
  transition: color var(--duration-fast);
}

.news-slide-actions .btn-subtle:hover {
  color: rgba(255, 255, 255, 0.9);
}

.news-slider-dots {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.75rem;
}

.news-slider-dots button {
  width: 32px;
  height: 3px;
  background: rgba(26, 58, 138, 0.15);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast);
}

.news-slider-dots button.active {
  background: var(--deep-blue);
  width: 48px;
}

.news-slider-dots button:hover {
  background: rgba(26, 58, 138, 0.4);
}

/* --- Tracks Section --- */
.tracks-section {
  padding: var(--section-gap) 2rem;
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.tracks-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 120px;
  background: linear-gradient(to bottom, var(--border-glow), transparent);
}

.track-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.track-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  transition: all var(--duration-normal) var(--ease-out);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.track-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-cta);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.track-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.track-card:hover::before {
  opacity: 1;
}

.track-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.track-card-icon::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  border: 1px solid var(--border-light);
  opacity: 0.5;
}

.track-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.track-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.track-card .track-tag {
  margin-top: 1.25rem;
}

.track-card .track-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--deep-blue);
  margin-top: 1.25rem;
  transition: gap var(--duration-fast);
}

.track-card:hover .track-link {
  gap: 0.7rem;
}

/* Activity Cards (below tracks) */
.activity-row {
  max-width: var(--content-max);
  margin: 2rem auto 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.activity-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: all var(--duration-normal) var(--ease-out);
}

.activity-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 123, 66, 0.2);
  box-shadow: 0 4px 20px rgba(255, 123, 66, 0.08);
}

.activity-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.3rem;
  background: rgba(255, 123, 66, 0.08);
  color: var(--energy-orange);
}

.activity-info h4 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.activity-info p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Stats Section --- */
.stats-section {
  padding: 5rem 2rem;
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

/* bg02.jpg 作为数据统计区装饰背景 */
.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../img/bg02.jpg');
  background-size: cover;
  background-position: center 100%;
  background-repeat: no-repeat;
  opacity: 0.15;
  pointer-events: none;
}

.stats-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 30% 50%, rgba(33, 150, 243, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 50%, rgba(92, 107, 192, 0.03) 0%, transparent 50%),
    linear-gradient(to bottom, var(--bg-dark) 0%, transparent 20%, transparent 80%, var(--bg-dark) 100%);
  pointer-events: none;
}

.stats-section .stats-grid,
.stats-section .section-inner {
  position: relative;
  z-index: 1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  max-width: var(--content-max);
  margin: 0 auto;
  text-align: center;
}

.stat-item .counter {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 900;
  color: var(--deep-blue);
  line-height: 1;
  margin-bottom: 0.5rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* --- News Section --- */
.news-section {
  padding: var(--section-gap) 2rem;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.news-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.news-card-image {
  height: 180px;
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}

.news-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 58, 138, 0.3), transparent);
}

.news-card-body {
  padding: 1.5rem;
}

.news-card-body .news-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.news-card-body h3 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-more {
  text-align: center;
  margin-top: 2.5rem;
}

/* --- Organizers Section --- */
.org-section {
  padding: var(--section-gap) 2rem;
  background: var(--bg-dark);
  position: relative;
}

.org-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2.5rem 4rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.org-item {
  text-align: center;
  opacity: 0.6;
  transition: opacity var(--duration-fast);
}

.org-item:hover {
  opacity: 1;
}

.org-item .org-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 0.75rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--text-muted);
}

.org-item .org-name {
  font-size: 0.82rem;
  color: var(--text-muted);
  max-width: 140px;
  line-height: 1.5;
}

.org-item.org-main .org-icon {
  border-color: rgba(33, 150, 243, 0.25);
  color: var(--deep-blue);
  background: rgba(33, 150, 243, 0.05);
}

.org-item.org-main .org-name {
  color: var(--text-secondary);
}



/* --- Responsive --- */
@media (max-width: 1024px) {
  .track-cards {
    grid-template-columns: 1fr 1fr;
  }
  .track-cards .track-card:last-child {
    grid-column: span 2;
  }
  .news-slide-card {
    grid-template-columns: 1fr;
  }
  .news-slide-body {
    padding: 1.25rem 1.75rem;
  }
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .news-slide-body {
    padding: 1rem 1.25rem;
  }
  .track-cards {
    grid-template-columns: 1fr;
  }
  .track-cards .track-card:last-child {
    grid-column: span 1;
  }
  .activity-row {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  .news-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .org-grid {
    gap: 1.5rem 2rem;
  }
  .hero {
    min-height: 100svh;
  }
  .hero-info-box {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
  .hero-organizer {
    color: rgba(0, 0, 0, 0.75);
  }
}
   

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    gap: 0.75rem;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

/* ============================================
   赛道速报板块（Hero 与 新闻幻灯片之间）
   ============================================ */

.track-showcase-section {
  padding: var(--section-gap) 2rem;
  background: linear-gradient(180deg, #E2EBF8 0%, #D6E1F5 50%, #CFDBF2 100%);
  position: relative;
  overflow: hidden;
}

.track-showcase-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(33, 150, 243, 0.07) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}

.track-showcase-section::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(92, 107, 192, 0.06) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}

.track-showcase-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1.5rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.track-showcase-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.track-showcase-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 64px rgba(26, 58, 138, 0.18), 0 8px 24px rgba(0, 0, 0, 0.08);
  border-color: rgba(26, 58, 138, 0.18);
}

/* 顶部霓虹光效条 */
.track-showcase-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  opacity: 0;
  transition: opacity var(--duration-normal);
  z-index: 2;
}

.track-showcase-glow--cyan {
  background: linear-gradient(90deg, #00BCD4, #2196F3, #00BCD4);
  box-shadow: 0 0 16px rgba(0, 188, 212, 0.4);
}

.track-showcase-glow--purple {
  background: linear-gradient(90deg, #7C3AED, #5C6BC0, #7C3AED);
  box-shadow: 0 0 16px rgba(124, 58, 237, 0.4);
}

.track-showcase-glow--orange {
  background: linear-gradient(90deg, #FF6B35, #FF7B42, #FF6B35);
  box-shadow: 0 0 16px rgba(255, 107, 53, 0.4);
}

.track-showcase-card:hover .track-showcase-glow {
  opacity: 1;
}

.track-showcase-inner {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  z-index: 1;
}

.track-showcase-body {
  display: flex;
  height: 100%;
  position: relative;
  z-index: 1;
}

.track-showcase-body .track-showcase-main .track-showcase-btn {
  margin-top: auto;
}

.track-showcase-body .track-showcase-main {
  flex: 1;
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

.track-showcase-main {
  flex: 1;
}

.track-showcase-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--icon-bg, rgba(26, 58, 138, 0.08));
  color: var(--icon-color, var(--deep-blue));
  margin-bottom: 1.25rem;
  position: relative;
  transition: transform var(--duration-normal) var(--ease-out);
}

.track-showcase-card:hover .track-showcase-icon {
  transform: scale(1.08);
}

.track-showcase-icon::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  border: 1px solid var(--border-light);
  opacity: 0.5;
  transition: opacity var(--duration-normal);
}

.track-showcase-card:hover .track-showcase-icon::after {
  opacity: 0.8;
}

.track-showcase-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.track-showcase-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}


/* 子赛道面板 */
.sub-tracks-panel {
  flex: 1;
  padding: 2rem;
  border-left: 1px solid var(--border-light);
  background: rgba(26, 58, 138, 0.02);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  justify-content: center;
}

.sub-tracks-panel-title {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.sub-track-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card-hover);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.sub-track-row:hover {
  background: rgba(0, 188, 212, 0.08);
  border-color: rgba(0, 188, 212, 0.3);
  color: #00838F;
  transform: translateX(4px);
  box-shadow: 0 2px 8px rgba(0, 188, 212, 0.1);
}

.sub-track-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--dot-color, var(--neon-cyan));
  box-shadow: 0 0 6px var(--dot-color, var(--neon-cyan));
  transition: box-shadow var(--duration-fast);
  flex-shrink: 0;
}

.sub-track-row:hover .sub-track-dot {
  box-shadow: 0 0 10px var(--dot-color, var(--neon-cyan));
}

/* 报名按钮 */
.track-showcase-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
  width: 100%;
  text-align: center;
}

.btn-cyan {
  background: linear-gradient(90deg, #00BCD4, #2196F3);
  color: var(--text-white);
  box-shadow: 0 4px 16px rgba(0, 188, 212, 0.25);
}

.btn-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 188, 212, 0.4);
}

.btn-purple {
  background: linear-gradient(90deg, #7C3AED, #5C6BC0);
  color: var(--text-white);
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.25);
}

.btn-purple:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.4);
}

.btn-orange {
  background: linear-gradient(90deg, #FF6B35, #FF7B42);
  color: var(--text-white);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.25);
}

.btn-orange:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 107, 53, 0.4);
}

/* --- 赛道速报响应式 --- */
@media (max-width: 1024px) {
  .track-showcase-grid {
    grid-template-columns: 1fr 1fr;
  }
  .track-showcase-card--featured {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .track-showcase-grid {
    grid-template-columns: 1fr;
  }
  .track-showcase-card--featured {
    grid-column: span 1;
  }
  .track-showcase-inner {
    padding: 1.5rem;
  }
  .track-showcase-body {
    flex-direction: column;
  }
  .sub-tracks-panel {
    border-left: none;
    border-top: 1px solid var(--border-light);
    padding: 1.5rem;
  }
}