/* 糖心Vlog - 暗黑潮流风格主样式 */
:root {
  --bg-primary: #050508;
  --bg-secondary: #0a0a12;
  --bg-card: #0f0f1a;
  --bg-card-hover: #141428;
  --neon-gold: #f0c040;
  --neon-purple: #9b59f5;
  --neon-pink: #e040fb;
  --neon-cyan: #00e5ff;
  --text-primary: #f0f0f8;
  --text-secondary: #a0a0c0;
  --text-muted: #606080;
  --border-color: #1e1e3a;
  --gradient-gold-purple: linear-gradient(135deg, #f0c040 0%, #9b59f5 100%);
  --gradient-purple-pink: linear-gradient(135deg, #9b59f5 0%, #e040fb 100%);
  --shadow-neon-gold: 0 0 20px rgba(240,192,64,0.4);
  --shadow-neon-purple: 0 0 20px rgba(155,89,245,0.4);
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.3s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--neon-gold); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--neon-purple); }

img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5,5,8,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-img { width: 36px; height: 36px; border-radius: 8px; }

.logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
}

.main-nav a {
  display: block;
  padding: 6px 14px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--neon-gold);
  background: rgba(240,192,64,0.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--neon-gold);
  border-radius: 2px;
  transition: all var(--transition);
}

/* 搜索框 */
.search-bar-wrap {
  background: rgba(10,10,18,0.8);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
}

.search-bar {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  overflow: hidden;
  max-width: 680px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-bar:focus-within {
  border-color: var(--neon-gold);
  box-shadow: var(--shadow-neon-gold);
}

#search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 10px 20px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-main);
}

#search-input::placeholder { color: var(--text-muted); }

#search-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--gradient-gold-purple);
  border: none;
  padding: 10px 20px;
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: var(--font-main);
  transition: opacity var(--transition);
}
#search-btn:hover { opacity: 0.85; }

.search-tip {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--neon-gold);
  padding-left: 20px;
}

/* ===== SECTIONS ===== */
section { padding: 80px 0; }

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  background: rgba(240,192,64,0.1);
  border: 1px solid rgba(240,192,64,0.3);
  color: var(--neon-gold);
  font-size: 0.8rem;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== HERO BANNER ===== */
.hero-section {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/banner.jpg') center/cover no-repeat;
  filter: brightness(0.45);
  z-index: 0;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, var(--bg-primary) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 800px;
  padding: 80px 20px 120px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(240,192,64,0.15);
  border: 1px solid rgba(240,192,64,0.4);
  color: var(--neon-gold);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  margin-bottom: 24px;
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(240,192,64,0.3); }
  50% { box-shadow: 0 0 25px rgba(240,192,64,0.6); }
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, var(--neon-gold) 50%, var(--neon-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: rgba(240,240,248,0.8);
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-domain {
  font-size: 0.9rem;
  color: var(--neon-cyan);
  margin-bottom: 30px;
  opacity: 0.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-gold-purple);
  color: #fff;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-neon-gold);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(240,192,64,0.6);
  color: #fff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--neon-purple);
  padding: 13px 32px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid var(--neon-purple);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-secondary:hover {
  background: rgba(155,89,245,0.15);
  box-shadow: var(--shadow-neon-purple);
  color: var(--neon-purple);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-top: 50px;
  flex-wrap: wrap;
}

.stat-item { text-align: center; }
.stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }

/* ===== VIDEO CARDS ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  border-color: rgba(240,192,64,0.4);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5), var(--shadow-neon-gold);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.video-card:hover .video-thumb img { transform: scale(1.08); }

.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: opacity var(--transition);
}

.video-card:hover .video-play-btn { opacity: 1; }

.play-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-gold-purple);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px rgba(240,192,64,0.6);
  animation: play-pulse 1.5s ease-in-out infinite;
}

@keyframes play-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.play-icon svg { width: 24px; height: 24px; fill: #fff; margin-left: 4px; }

.video-neon-border {
  position: absolute;
  inset: 0;
  border: 2px solid transparent;
  border-radius: var(--radius);
  background: linear-gradient(var(--bg-card), var(--bg-card)) padding-box,
              var(--gradient-gold-purple) border-box;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.video-card:hover .video-neon-border { opacity: 1; }

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
}

.video-info { padding: 16px; }

.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.video-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== COMMUNITY SECTION ===== */
.community-section { background: var(--bg-secondary); }

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.topic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}

.topic-card:hover {
  border-color: rgba(155,89,245,0.5);
  box-shadow: var(--shadow-neon-purple);
  transform: translateY(-4px);
}

.topic-tag {
  color: var(--neon-gold);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.topic-hot {
  color: var(--neon-pink);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.topic-desc { color: var(--text-secondary); font-size: 0.9rem; }

/* 弹幕展示 */
.danmaku-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  overflow: hidden;
  height: 80px;
  position: relative;
}

.danmaku-track {
  display: flex;
  gap: 40px;
  white-space: nowrap;
  animation: danmaku-scroll 20s linear infinite;
}

@keyframes danmaku-scroll {
  from { transform: translateX(100%); }
  to { transform: translateX(-100%); }
}

.danmaku-item {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 4px 12px;
  background: rgba(155,89,245,0.1);
  border-radius: 20px;
  border: 1px solid rgba(155,89,245,0.2);
  flex-shrink: 0;
}

/* ===== AI SECTION ===== */
.ai-section { background: var(--bg-primary); }

.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.ai-image-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(155,89,245,0.3);
  box-shadow: var(--shadow-neon-purple);
}

.ai-image-wrap img { width: 100%; }

.ai-features { display: flex; flex-direction: column; gap: 20px; }

.ai-feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: all var(--transition);
}

.ai-feature-item:hover {
  border-color: rgba(240,192,64,0.4);
  transform: translateX(6px);
}

.ai-icon {
  width: 44px;
  height: 44px;
  background: rgba(240,192,64,0.1);
  border: 1px solid rgba(240,192,64,0.3);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.ai-feature-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--neon-gold);
  margin-bottom: 6px;
}

.ai-feature-desc { font-size: 0.875rem; color: var(--text-secondary); }

/* ===== EXPERTS ===== */
.experts-section { background: var(--bg-secondary); }

.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 30px 20px;
  text-align: center;
  transition: all var(--transition);
}

.expert-card:hover {
  border-color: rgba(240,192,64,0.4);
  box-shadow: var(--shadow-neon-gold);
  transform: translateY(-6px);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid transparent;
  background: linear-gradient(var(--bg-card), var(--bg-card)) padding-box,
              var(--gradient-gold-purple) border-box;
  overflow: hidden;
}

.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }

.expert-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.expert-title {
  font-size: 0.85rem;
  color: var(--neon-gold);
  margin-bottom: 10px;
}

.expert-desc { font-size: 0.82rem; color: var(--text-secondary); }

/* ===== REVIEWS ===== */
.reviews-section { background: var(--bg-primary); }

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}

.review-card:hover {
  border-color: rgba(155,89,245,0.4);
  box-shadow: var(--shadow-neon-purple);
}

.review-stars {
  color: var(--neon-gold);
  font-size: 1rem;
  margin-bottom: 12px;
}

.review-content {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-gold-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-name { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }
.review-date { font-size: 0.78rem; color: var(--text-muted); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-secondary); }

.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.active { border-color: rgba(240,192,64,0.4); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  gap: 16px;
  user-select: none;
}

.faq-question:hover { color: var(--neon-gold); }

.faq-icon {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
  color: var(--neon-gold);
  transition: transform var(--transition);
}

.faq-item.active .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer { max-height: 300px; }

.faq-answer-inner {
  padding: 0 24px 18px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== PARTNERS ===== */
.partners-section { background: var(--bg-primary); }

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
  margin-bottom: 60px;
}

.partner-logo {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
  transition: all var(--transition);
}

.partner-logo:hover {
  border-color: rgba(240,192,64,0.3);
  color: var(--neon-gold);
}

/* ===== CONTACT ===== */
.contact-section { background: var(--bg-secondary); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--neon-gold);
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }

.join-guide {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 30px;
}

.join-guide h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--neon-purple);
  margin-bottom: 20px;
}

.join-steps { display: flex; flex-direction: column; gap: 14px; }

.join-step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.step-num {
  width: 28px;
  height: 28px;
  background: var(--gradient-gold-purple);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.step-text { font-size: 0.9rem; color: var(--text-secondary); padding-top: 4px; }

/* ===== FOOTER ===== */
.site-footer {
  background: #030305;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand h3 {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 10px 0 6px;
}

.footer-brand p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 4px; }
.footer-domain { color: var(--neon-cyan) !important; font-size: 0.82rem !important; }
.footer-logo { width: 80px; height: auto; }

.footer-nav-group h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-nav-group ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-nav-group a { font-size: 0.85rem; color: var(--text-muted); }
.footer-nav-group a:hover { color: var(--neon-gold); }

.footer-qr { display: flex; gap: 20px; }

.qr-item { text-align: center; }
.qr-item img {
  width: 90px;
  height: 90px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}
.qr-item p { font-size: 0.78rem; color: var(--text-muted); margin-top: 6px; }

.footer-bottom {
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.footer-social { display: flex; gap: 16px; }
.footer-social a {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 4px 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}
.footer-social a:hover { color: var(--neon-gold); border-color: rgba(240,192,64,0.3); }

.footer-copy { font-size: 0.82rem; color: var(--text-muted); }
.footer-copy a { color: var(--text-muted); }
.footer-copy a:hover { color: var(--neon-gold); }

.footer-disclaimer { font-size: 0.78rem; color: var(--text-muted); opacity: 0.6; }

/* ===== PAGE HERO (内页) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, #0d0d20 100%);
  padding: 60px 0;
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.page-hero p { color: var(--text-secondary); font-size: 1rem; }

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--neon-gold); }
.breadcrumb span { color: var(--neon-gold); }

/* ===== PARTICLES CANVAS ===== */
#particles-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .ai-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  section { padding: 50px 0; }
  .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(5,5,8,0.98); padding: 20px; border-bottom: 1px solid var(--border-color); }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { padding: 12px 16px; }
  .nav-toggle { display: flex; }
  .hero-stats { gap: 20px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-qr { display: none; }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero-buttons { flex-direction: column; align-items: center; }
  .video-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ===== ANIMATIONS ===== */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== NEON TEXT ===== */
.neon-text-gold { color: var(--neon-gold); text-shadow: 0 0 10px rgba(240,192,64,0.5); }
.neon-text-purple { color: var(--neon-purple); text-shadow: 0 0 10px rgba(155,89,245,0.5); }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--neon-purple); }