/* ============================================
   彩票 - 主样式文件
   品牌：彩票 | 域名：hlntnq.cn
   ============================================ */

/* CSS变量 */
:root {
  --primary: #00C851;
  --primary-dark: #009B3A;
  --primary-light: #33D668;
  --secondary: #0A1628;
  --secondary-light: #132040;
  --accent: #FF6B35;
  --accent-dark: #E55A25;
  --text-dark: #1A2332;
  --text-medium: #495057;
  --text-light: #6C757D;
  --text-muted: #adb5bd;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-alt: #f0f4f8;
  --border: #dee2e6;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.15);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
}

/* 重置样式 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }
.mt-4 { margin-top: 40px; }
.mb-3 { margin-bottom: 30px; }

/* ============================================
   顶部滚动新闻条
   ============================================ */
.ticker-bar {
  background: var(--secondary);
  color: #fff;
  height: 36px;
  overflow: hidden;
  position: relative;
  z-index: 100;
}
.ticker-inner {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  gap: 16px;
}
.ticker-label {
  background: var(--primary);
  color: #fff;
  padding: 2px 12px;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}
.ticker-content {
  flex: 1;
  overflow: hidden;
  position: relative;
}
.ticker-text {
  display: flex;
  gap: 60px;
  animation: ticker 40s linear infinite;
  white-space: nowrap;
}
.ticker-text span { font-size: 13px; color: rgba(255,255,255,0.85); }
@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ============================================
   网站头部
   ============================================ */
.site-header {
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 999;
}
.header-top {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  padding: 6px 0;
  font-size: 12px;
  color: var(--text-light);
}
.header-top-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header-top-inner div { display: flex; gap: 16px; }
.header-top-inner a { color: var(--text-light); font-size: 12px; transition: var(--transition); }
.header-top-inner a:hover { color: var(--primary); }
.header-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.site-logo img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}
.logo-text { display: flex; flex-direction: column; }
.logo-name {
  font-size: 22px;
  font-weight: 900;
  color: var(--secondary);
  line-height: 1.2;
}
.logo-name span { color: var(--primary); }
.logo-tagline { font-size: 11px; color: var(--text-light); }
.header-search { flex: 1; max-width: 500px; }
.search-form {
  display: flex;
  border: 2px solid var(--border);
  border-radius: 25px;
  overflow: hidden;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,200,81,0.15); }
.search-input {
  flex: 1;
  padding: 10px 16px;
  border: none;
  outline: none;
  font-size: 14px;
  background: transparent;
  font-family: inherit;
}
.search-btn {
  padding: 10px 18px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  transition: var(--transition);
}
.search-btn:hover { background: var(--primary-dark); }
.live-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,59,48,0.1);
  border: 1px solid rgba(255,59,48,0.3);
  padding: 6px 14px;
  border-radius: 20px;
  flex-shrink: 0;
}
.live-dot {
  width: 8px;
  height: 8px;
  background: #FF3B30;
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
.live-text { font-size: 12px; font-weight: 700; color: #FF3B30; }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

/* ============================================
   主导航
   ============================================ */
.main-nav {
  background: var(--secondary);
  border-top: 1px solid rgba(255,255,255,0.05);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
}
.nav-menu li a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 14px 14px;
  color: rgba(255,255,255,0.8);
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
}
.nav-menu li a:hover,
.nav-menu li.active a {
  color: var(--primary);
  background: rgba(0,200,81,0.1);
}
.nav-menu li.active a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}
.nav-icon { font-size: 14px; }
.nav-hot {
  background: #FF3B30;
  color: #fff;
  font-size: 9px;
  padding: 1px 4px;
  border-radius: 3px;
  font-weight: 700;
  margin-left: 2px;
}
.nav-toggle {
  display: none;
  color: #fff;
  font-size: 22px;
  padding: 10px;
}

/* ============================================
   面包屑
   ============================================ */
.breadcrumb {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  font-size: 13px;
  color: var(--text-light);
}
.breadcrumb .container { display: flex; align-items: center; gap: 6px; }
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--text-muted); }

/* ============================================
   Hero区域
   ============================================ */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--secondary);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/images/hero-bg.jpg') center/cover no-repeat;
  opacity: 0.3;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,0.95) 0%, rgba(10,22,40,0.7) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: center;
  width: 100%;
}
.hero-text h1 {
  font-size: 42px;
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-text h1 .highlight { color: var(--primary); }
.hero-sub {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 560px;
}
.hero-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}
.stat-label { font-size: 12px; color: rgba(255,255,255,0.6); margin-top: 4px; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* 实时比赛卡片 */
.hero-live {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(10px);
}
.live-match-card {
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 10px;
}
.live-match-card:last-child { margin-bottom: 0; }
.match-teams {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.team-name { font-size: 13px; font-weight: 700; color: #fff; flex: 1; }
.team-name:last-child { text-align: right; }
.match-score {
  font-size: 20px;
  font-weight: 900;
  color: var(--primary);
  text-align: center;
  min-width: 60px;
  transition: transform 0.3s ease;
}
.match-status { display: flex; align-items: center; justify-content: space-between; }
.match-time { font-size: 11px; color: rgba(255,255,255,0.5); }
.match-live-tag {
  background: #FF3B30;
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 700;
  animation: pulse 1.5s infinite;
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 24px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 700;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,200,81,0.4);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,107,53,0.4);
}
.btn-sm { padding: 7px 16px; font-size: 12px; }

/* ============================================
   通用区块
   ============================================ */
.section { padding: 60px 0; }
.section-alt { background: var(--bg-light); }
.section-dark { background: var(--secondary); }
.section-dark .section-title { color: #fff; }
.section-dark .section-desc { color: rgba(255,255,255,0.65); }
.section-header { text-align: center; margin-bottom: 40px; }
.section-tag {
  display: inline-block;
  background: rgba(0,200,81,0.1);
  color: var(--primary);
  border: 1px solid rgba(0,200,81,0.3);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 12px;
}
.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-desc {
  font-size: 15px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================
   视频卡片
   ============================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--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;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-play-btn:hover .play-icon { transform: scale(1.1); }
.video-live-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: #FF3B30;
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 700;
  animation: pulse 1.5s infinite;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 3px;
  font-weight: 600;
}
.video-info { padding: 14px; }
.video-category {
  font-size: 11px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 6px;
  text-transform: uppercase;
}
.video-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats { display: flex; gap: 8px; }
.video-stat { font-size: 11px; color: var(--text-light); }

/* 分类标签 */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.cat-tab {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-light);
  color: var(--text-medium);
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.cat-tab:hover, .cat-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ============================================
   功能特色卡片
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.feature-icon { font-size: 36px; margin-bottom: 14px; }
.feature-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.feature-desc { font-size: 13px; color: var(--text-light); line-height: 1.7; }

/* ============================================
   AI赋能区域
   ============================================ */
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.ai-features { display: flex; flex-direction: column; gap: 20px; }
.ai-feature-item {
  display: flex;
  gap: 16px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.ai-feature-item:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }
.ai-icon { font-size: 28px; flex-shrink: 0; }
.ai-text h4 { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.ai-text p { font-size: 13px; color: var(--text-light); line-height: 1.7; }
.ai-visual {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  border-radius: var(--radius-lg);
  padding: 28px;
}
.ai-chart { display: flex; flex-direction: column; gap: 14px; }
.chart-item { display: flex; align-items: center; gap: 10px; }
.chart-label { font-size: 13px; color: rgba(255,255,255,0.8); width: 70px; flex-shrink: 0; }
.chart-bar-wrap {
  flex: 1;
  height: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
  overflow: hidden;
}
.chart-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 4px;
  width: 0;
  transition: width 1.5s ease;
}
.chart-value { font-size: 13px; font-weight: 700; color: var(--primary); width: 40px; text-align: right; }

/* ============================================
   社区功能
   ============================================ */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.community-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}
.community-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--primary);
  transform: translateY(-4px);
}
.community-icon { font-size: 32px; margin-bottom: 14px; }
.community-title { font-size: 17px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.community-desc { font-size: 13px; color: rgba(255,255,255,0.65); line-height: 1.7; margin-bottom: 16px; }
.community-stats { display: flex; gap: 20px; }
.comm-stat { text-align: center; }
.comm-stat-num { display: block; font-size: 20px; font-weight: 800; color: var(--primary); }
.comm-stat-label { font-size: 11px; color: rgba(255,255,255,0.5); }

/* ============================================
   专家卡片
   ============================================ */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.expert-avatar {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: var(--secondary);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.expert-badge {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 3px;
  font-weight: 700;
}
.expert-info { padding: 20px; }
.expert-name { font-size: 18px; font-weight: 800; color: var(--text-dark); margin-bottom: 4px; }
.expert-title { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: 13px; color: var(--text-light); line-height: 1.7; margin-bottom: 12px; }
.expert-awards { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.award-tag {
  background: var(--bg-light);
  color: var(--text-medium);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid var(--border);
}
.expert-btns { display: flex; gap: 8px; }

/* ============================================
   合作品牌
   ============================================ */
.partner-logos {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}
.partner-logo {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-medium);
  transition: var(--transition);
  cursor: pointer;
}
.partner-logo:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   加入步骤
   ============================================ */
.join-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.step-item {
  text-align: center;
  padding: 28px 20px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.step-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.step-num {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  margin: 0 auto 16px;
}
.step-title { font-size: 16px; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; }
.step-desc { font-size: 13px; color: var(--text-light); line-height: 1.7; }

/* ============================================
   用户评价
   ============================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.review-header { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.review-avatar {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}
.review-user-info h4 { font-size: 14px; font-weight: 700; color: var(--text-dark); }
.review-user-info span { font-size: 12px; color: var(--text-muted); }
.review-stars { margin-bottom: 10px; }
.star { color: #FFB800; font-size: 16px; }
.review-content { font-size: 13px; color: var(--text-medium); line-height: 1.7; margin-bottom: 12px; }
.review-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.review-tag {
  background: var(--bg-light);
  color: var(--text-light);
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 11px;
}
.review-stats { display: flex; gap: 12px; font-size: 11px; color: var(--text-muted); }

/* ============================================
   联系方式
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.contact-info h3 { font-size: 20px; font-weight: 800; color: var(--text-dark); margin-bottom: 24px; }
.contact-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.contact-icon {
  width: 40px;
  height: 40px;
  background: rgba(0,200,81,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.contact-text h4 { font-size: 14px; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.contact-text p { font-size: 13px; color: var(--text-light); line-height: 1.6; }
.qr-codes { display: flex; gap: 16px; margin-top: 20px; }
.qr-item { text-align: center; }
.qr-box {
  width: 80px;
  height: 80px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 6px;
}
.qr-label { font-size: 11px; color: var(--text-light); }

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.faq-question {
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}
.faq-question:hover { background: var(--bg-light); }
.faq-question.active { color: var(--primary); background: rgba(0,200,81,0.05); }
.faq-arrow { font-size: 12px; transition: transform 0.3s; }
.faq-question.active .faq-arrow { transform: rotate(180deg); }
.faq-answer {
  display: none;
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-medium);
  line-height: 1.8;
  border-top: 1px solid var(--border);
}
.faq-answer.show { display: block; }

/* ============================================
   分享按钮
   ============================================ */
.share-btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid var(--border);
  background: var(--bg-white);
  color: var(--text-medium);
}
.share-btn:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

/* ============================================
   底部
   ============================================ */
.site-footer { background: var(--secondary); color: rgba(255,255,255,0.8); padding-top: 60px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .site-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.8; margin-bottom: 16px; }
.footer-social { display: flex; gap: 10px; margin-bottom: 20px; }
.social-link {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: var(--transition);
  cursor: pointer;
}
.social-link:hover { background: var(--primary); transform: translateY(-2px); }
.footer-qr { display: flex; gap: 12px; }
.footer-qr-item { text-align: center; }
.footer-qr-box {
  width: 60px;
  height: 60px;
  background: #fff;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 4px;
}
.footer-qr-label { font-size: 10px; color: rgba(255,255,255,0.5); }
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links li a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-links li a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  background: rgba(0,0,0,0.2);
  padding: 16px 0;
}
.footer-bottom-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}
.footer-copyright a { color: var(--primary); }
.footer-update { color: rgba(255,255,255,0.5); }
.footer-links-bottom { display: flex; gap: 16px; }
.footer-links-bottom a { color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links-bottom a:hover { color: var(--primary); }

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-live { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .header-top { display: none; }
  .header-main { padding: 10px 16px; }
  .header-search { display: none; }
  .live-badge { display: none; }
  .logo-name { font-size: 18px; }
  
  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--secondary);
    padding: 10px 0;
    box-shadow: var(--shadow-md);
    z-index: 1000;
  }
  .nav-menu.open { display: flex; }
  .nav-menu li a { padding: 12px 20px; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .nav-toggle { display: block; }
  .main-nav { position: relative; }
  
  .hero-text h1 { font-size: 28px; }
  .hero-stats { gap: 16px; }
  .stat-num { font-size: 22px; }
  
  .section { padding: 40px 0; }
  .section-title { font-size: 22px; }
  
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .join-steps { grid-template-columns: 1fr 1fr; }
  
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .join-steps { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; justify-content: center; }
  .category-tabs { gap: 6px; }
  .cat-tab { padding: 6px 12px; font-size: 12px; }
}

/* ============================================
   图片加载动画
   ============================================ */
img { opacity: 1; transition: opacity 0.3s ease; }
img.loaded { opacity: 1; }

/* ============================================
   滚动条美化
   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }