/* ========================================
   香蕉视频 - 主样式文件
   暗黑潮流·赛博朋克·霓虹金紫渐变
   ======================================== */

/* CSS变量 */
:root {
  --bg-primary: #050508;
  --bg-secondary: #0a0a10;
  --bg-card: #0f0f18;
  --bg-card-hover: #141422;
  --neon-gold: #f5c518;
  --neon-purple: #9b59b6;
  --neon-pink: #e91e8c;
  --neon-blue: #00d4ff;
  --text-primary: #f0f0f8;
  --text-secondary: #a0a0b8;
  --text-muted: #606078;
  --border-color: rgba(245,197,24,0.12);
  --border-hover: rgba(245,197,24,0.35);
  --gradient-gold-purple: linear-gradient(135deg, #f5c518 0%, #9b59b6 100%);
  --gradient-dark: linear-gradient(180deg, rgba(5,5,8,0) 0%, rgba(5,5,8,0.95) 100%);
  --shadow-gold: 0 0 20px rgba(245,197,24,0.15);
  --shadow-purple: 0 0 20px rgba(155,89,182,0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* 重置 */
*, *::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: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* 粒子画布 */
#particles-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(5,5,8,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}
.navbar-inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
  flex-shrink: 0;
}
.logo-icon { font-size: 1.5rem; -webkit-text-fill-color: initial; }
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  flex-wrap: nowrap;
}
.navbar-nav li a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.navbar-nav li a:hover,
.navbar-nav li a.active {
  color: var(--neon-gold);
  background: rgba(245,197,24,0.08);
}
.navbar-cta {
  background: var(--gradient-gold-purple) !important;
  color: #000 !important;
  font-weight: 700 !important;
  padding: 6px 16px !important;
  border-radius: 20px !important;
}
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.navbar-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--neon-gold);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== 搜索栏 ===== */
.search-bar-wrap {
  position: fixed;
  top: 64px; left: 0; right: 0;
  z-index: 999;
  background: rgba(10,10,16,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
}
.search-bar-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.search-input-wrap {
  display: flex;
  gap: 8px;
}
.search-input {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 8px 20px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
.search-input:focus {
  border-color: var(--neon-gold);
  background: rgba(245,197,24,0.05);
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  background: var(--gradient-gold-purple);
  border-radius: 24px;
  padding: 8px 20px;
  font-size: 0.9rem;
  color: #000;
  font-weight: 700;
  transition: var(--transition);
}
.search-btn:hover { opacity: 0.85; transform: scale(1.03); }
.search-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.search-tag {
  padding: 3px 12px;
  background: rgba(245,197,24,0.08);
  border: 1px solid rgba(245,197,24,0.2);
  border-radius: 12px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.search-tag:hover {
  background: rgba(245,197,24,0.15);
  color: var(--neon-gold);
  border-color: rgba(245,197,24,0.4);
}

/* ===== 首屏Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 130px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(155,89,182,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 20% 70%, rgba(245,197,24,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 80% 80%, rgba(0,212,255,0.08) 0%, transparent 50%),
    var(--bg-primary);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5,5,8,0.4) 0%, rgba(5,5,8,0.1) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,197,24,0.1);
  border: 1px solid rgba(245,197,24,0.3);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.85rem;
  color: var(--neon-gold);
  margin-bottom: 24px;
  animation: pulse-glow 2s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 8px rgba(245,197,24,0.2); }
  50% { box-shadow: 0 0 20px rgba(245,197,24,0.4); }
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero-title .brand {
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-gold-purple);
  color: #000;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 32px;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245,197,24,0.3);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  padding: 13px 32px;
  border-radius: 32px;
  font-size: 1rem;
  border: 1px solid rgba(245,197,24,0.35);
  transition: var(--transition);
  cursor: pointer;
}
.btn-secondary:hover {
  border-color: var(--neon-gold);
  color: var(--neon-gold);
  background: rgba(245,197,24,0.05);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== 通用区块 ===== */
.section {
  padding: 80px 0;
  position: relative;
  z-index: 1;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--neon-gold);
  background: rgba(245,197,24,0.08);
  border: 1px solid rgba(245,197,24,0.2);
  padding: 4px 14px;
  border-radius: 12px;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.25;
}
.section-title .brand {
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245,197,24,0.15), rgba(155,89,182,0.15), transparent);
  margin: 0 24px;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.tab-btn {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.tab-btn:hover,
.tab-btn.active {
  background: var(--gradient-gold-purple);
  color: #000;
  border-color: transparent;
  font-weight: 700;
}

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
}
.video-card:hover .video-play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.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 0.4s ease;
}
.video-card:hover .video-thumb img {
  transform: scale(1.05);
}
.video-play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 56px; height: 56px;
  background: rgba(245,197,24,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.play-icon {
  border-left: 20px solid #000;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info {
  padding: 14px 16px;
}
.video-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--neon-gold);
  background: rgba(245,197,24,0.1);
  border: 1px solid rgba(245,197,24,0.2);
  padding: 2px 8px;
  border-radius: 6px;
  margin-bottom: 8px;
}
.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--text-primary);
}
.video-meta {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===== 弹幕 ===== */
.danmaku-wrap {
  overflow: hidden;
  height: 44px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  margin-bottom: 40px;
  position: relative;
}
.danmaku-track {
  display: flex;
  gap: 60px;
  white-space: nowrap;
  animation: danmaku-scroll 30s linear infinite;
  padding: 10px 20px;
  align-items: center;
}
@keyframes danmaku-scroll {
  0% { transform: translateX(100vw); }
  100% { transform: translateX(-100%); }
}
.danmaku-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 4px 14px;
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}
.danmaku-item.gold { color: var(--neon-gold); border-color: rgba(245,197,24,0.2); background: rgba(245,197,24,0.06); }
.danmaku-item.purple { color: var(--neon-purple); border-color: rgba(155,89,182,0.2); background: rgba(155,89,182,0.06); }
.danmaku-item.pink { color: var(--neon-pink); border-color: rgba(233,30,140,0.2); background: rgba(233,30,140,0.06); }

/* ===== 社区卡片 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.community-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}
.community-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-purple);
}
.community-topic {
  font-size: 1rem;
  font-weight: 700;
  color: var(--neon-gold);
  margin-bottom: 10px;
}
.community-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}
.community-count {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.community-count strong { color: var(--neon-purple); }

/* ===== AI卡片 ===== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}
.ai-card:hover {
  border-color: rgba(155,89,182,0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-purple);
}
.ai-icon {
  font-size: 2.5rem;
  margin-bottom: 14px;
  display: block;
}
.ai-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.ai-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 专家卡片 ===== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
}
.expert-avatar {
  width: 72px; height: 72px;
  background: var(--gradient-gold-purple);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: #000;
  margin: 0 auto 16px;
}
.expert-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.expert-title {
  font-size: 0.82rem;
  color: var(--neon-gold);
  margin-bottom: 12px;
}
.expert-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 评价卡片 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}
.review-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-secondary);
  flex-shrink: 0;
}
.review-avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.review-user {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 2px;
}
.review-stars {
  color: var(--neon-gold);
  font-size: 0.85rem;
}
.review-content {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== 合作伙伴 ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}
.partner-item:hover {
  border-color: var(--border-hover);
  color: var(--neon-gold);
  background: rgba(245,197,24,0.05);
}

/* ===== FAQ ===== */
.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-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-hover); }
.faq-q {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-q::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--neon-gold);
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-q::after { content: '−'; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.open .faq-a { max-height: 300px; }
.faq-a p {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ===== 联系 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 24px;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.contact-item .icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }
.qr-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.qr-item { text-align: center; }
.qr-box {
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin-bottom: 8px;
}
.qr-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  position: relative;
  z-index: 1;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 60px 0 40px;
}
.footer-brand .logo {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}
.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}
.social-btn {
  width: 36px; height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition);
}
.social-btn:hover {
  border-color: var(--neon-gold);
  color: var(--neon-gold);
  background: rgba(245,197,24,0.08);
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--neon-gold); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--neon-gold); }

/* ===== 内页通用 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-secondary); transition: var(--transition); }
.breadcrumb a:hover { color: var(--neon-gold); }
.breadcrumb .sep { color: var(--text-muted); }
.breadcrumb .current { color: var(--neon-gold); }
.page-hero {
  padding: 80px 24px 60px;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  margin-bottom: 16px;
}
.page-hero p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===== 动画 ===== */
.fade-in-up {
  animation: fadeInUp 0.5s ease forwards;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .navbar-nav {
    display: none;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(5,5,8,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
  }
  .navbar-nav.open { display: flex; }
  .navbar-nav li a { padding: 12px 16px; font-size: 1rem; }
  .navbar-toggle { display: flex; margin-left: auto; }
  .hero-stats { gap: 24px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .section { padding: 48px 0; }
  .qr-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid, .experts-grid, .reviews-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .search-bar-inner { padding: 0 12px; }
}