/* ===== 探花 - 主样式文件 ===== */
/* 原创设计：甜心粉+深邃紫配色方案 */

:root {
  --primary: #FF6B81;
  --primary-dark: #e8556a;
  --primary-light: #FFB3BE;
  --secondary: #2D3436;
  --accent: #6C5CE7;
  --accent2: #00B894;
  --bg-white: #FFFFFF;
  --bg-light: #F8F9FA;
  --bg-dark: #1a1a2e;
  --text-dark: #2D3436;
  --text-mid: #636E72;
  --text-light: #B2BEC3;
  --border: #E9ECEF;
  --shadow: rgba(255,107,129,0.15);
  --shadow-dark: rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: all 0.3s ease;
}

/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; background: none; }

/* ===== 顶部公告栏 ===== */
.top-notice {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.top-notice a { color: #fff; text-decoration: underline; margin-left: 8px; }

/* ===== 头部导航 ===== */
.site-header {
  background: #fff;
  box-shadow: 0 2px 20px var(--shadow-dark);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-wrap img.site-logo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}
.logo-text {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}
.logo-sub {
  font-size: 11px;
  color: var(--text-mid);
  display: block;
  letter-spacing: 2px;
  margin-top: -4px;
}

/* ===== 主导航 ===== */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dark);
  white-space: nowrap;
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
}
.main-nav a:hover::after, .main-nav a.active::after { width: 60%; }

/* ===== 搜索框 ===== */
.search-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-light);
  border: 1.5px solid var(--border);
  border-radius: 24px;
  padding: 6px 16px;
  gap: 8px;
  min-width: 200px;
  transition: var(--transition);
}
.search-wrap:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,107,129,0.12);
}
.search-wrap input {
  border: none;
  background: none;
  outline: none;
  font-size: 14px;
  color: var(--text-dark);
  width: 100%;
}
.search-wrap input::placeholder { color: var(--text-light); }
.search-btn {
  color: var(--primary);
  font-size: 16px;
  padding: 0;
  line-height: 1;
}

/* 搜索下拉建议 */
.search-suggestions {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 8px 30px var(--shadow-dark);
  z-index: 100;
  overflow: hidden;
}
.search-suggestions.show { display: block; }
.suggestion-item {
  padding: 10px 16px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dark);
}
.suggestion-item:hover { background: var(--bg-light); color: var(--primary); }
.suggestion-item span { color: var(--text-mid); font-size: 12px; }

/* ===== 面包屑 ===== */
.breadcrumb {
  background: var(--bg-light);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  font-size: 13px;
  color: var(--text-mid);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb-inner a { color: var(--text-mid); }
.breadcrumb-inner a:hover { color: var(--primary); }
.breadcrumb-inner .sep { color: var(--text-light); }
.breadcrumb-inner .current { color: var(--text-dark); font-weight: 500; }

/* ===== 容器 ===== */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-sm { padding: 40px 0; }

/* ===== 区块标题 ===== */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-light), #FFD6DC);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-title span { color: var(--primary); }
.section-desc {
  font-size: 15px;
  color: var(--text-mid);
  max-width: 600px;
  margin: 0 auto;
}
.section-header-left { text-align: left; }
.section-header-left .section-desc { margin: 0; }

/* ===== Hero Banner ===== */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(45,52,54,0.7) 0%, rgba(108,92,231,0.3) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
  color: #fff;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,107,129,0.25);
  border: 1px solid rgba(255,107,129,0.5);
  color: #FFB3BE;
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}
.hero h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero h1 .highlight { color: var(--primary-light); }
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(255,107,129,0.4);
  transition: var(--transition);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,107,129,0.5);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid rgba(255,255,255,0.6);
  color: #fff;
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat-item { text-align: center; }
.hero-stat-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary-light);
  display: block;
}
.hero-stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
  margin-top: 2px;
}

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 16px var(--shadow-dark);
  transition: var(--transition);
  cursor: pointer;
  display: block;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(255,107,129,0.2);
}
.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
  background: var(--bg-dark);
}
.video-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  background: rgba(255,107,129,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.video-card:hover .play-btn {
  background: var(--primary);
  transform: translate(-50%, -50%) scale(1.1);
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px; }
.video-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-mid);
}
.video-meta span { display: flex; align-items: center; gap: 3px; }
.video-stats {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-mid);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.video-stats span { display: flex; align-items: center; gap: 3px; }
.video-stats .hot { color: var(--primary); }

/* ===== 功能模块卡片 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: 0 2px 16px var(--shadow-dark);
  transition: var(--transition);
  border: 1.5px solid transparent;
  text-align: center;
}
.feature-card:hover {
  border-color: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--shadow);
}
.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-light), #FFD6DC);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 16px;
}
.feature-icon.blue { background: linear-gradient(135deg, #74B9FF, #A29BFE); }
.feature-icon.green { background: linear-gradient(135deg, #55EFC4, #00B894); }
.feature-icon.purple { background: linear-gradient(135deg, #A29BFE, #6C5CE7); }
.feature-icon.orange { background: linear-gradient(135deg, #FDCB6E, #E17055); }
.feature-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.feature-desc { font-size: 13px; color: var(--text-mid); line-height: 1.6; }

/* ===== 专家卡片 ===== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 16px var(--shadow-dark);
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--shadow);
}
.expert-photo {
  width: 100%;
  height: 240px;
  object-fit: cover;
  object-position: top;
}
.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-mid); line-height: 1.6; margin-bottom: 14px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.award-tag {
  background: var(--bg-light);
  color: var(--text-mid);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.expert-actions { display: flex; gap: 10px; }
.btn-sm {
  flex: 1;
  text-align: center;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm.primary {
  background: var(--primary);
  color: #fff;
}
.btn-sm.primary:hover { background: var(--primary-dark); }
.btn-sm.outline {
  border: 1.5px solid var(--primary);
  color: var(--primary);
}
.btn-sm.outline:hover { background: var(--primary); color: #fff; }

/* ===== 用户评价 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 2px 16px var(--shadow-dark);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--shadow); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}
.reviewer-name { font-size: 15px; font-weight: 700; color: var(--text-dark); }
.reviewer-date { font-size: 12px; color: var(--text-light); margin-top: 2px; }
.review-stars { color: #FDCB6E; font-size: 14px; margin-bottom: 10px; }
.review-text { font-size: 14px; color: var(--text-mid); line-height: 1.7; }
.review-tag {
  display: inline-block;
  background: var(--bg-light);
  color: var(--primary);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  margin-top: 10px;
  border: 1px solid var(--primary-light);
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: 0 2px 12px var(--shadow-dark);
  overflow: hidden;
  border: 1.5px solid var(--border);
  transition: var(--transition);
}
.faq-item.open { border-color: var(--primary-light); }
.faq-question {
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  user-select: none;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--primary);
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.8;
}
.faq-item.open .faq-answer { display: block; }

/* ===== 合作品牌Logo墙 ===== */
.partner-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
}
.partner-logo {
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-mid);
  border: 1.5px solid var(--border);
  transition: var(--transition);
  white-space: nowrap;
}
.partner-logo:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #fff;
  box-shadow: 0 4px 16px var(--shadow);
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 2px 16px var(--shadow-dark);
}
.contact-info-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--text-mid);
}
.contact-item-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-light), #FFD6DC);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.contact-item-label { font-size: 12px; color: var(--text-light); margin-bottom: 2px; }
.contact-item-value { font-size: 14px; color: var(--text-dark); font-weight: 600; }
.qr-codes {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
}
.qr-label { font-size: 12px; color: var(--text-mid); margin-top: 6px; }

/* ===== 社区入口 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.community-card {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  color: #fff;
  transition: var(--transition);
  cursor: pointer;
}
.community-card:hover { transform: translateY(-3px); box-shadow: 0 8px 30px var(--shadow); }
.community-card.green { background: linear-gradient(135deg, var(--accent2), #00CEC9); }
.community-card.purple { background: linear-gradient(135deg, var(--accent), #A29BFE); }
.community-card.orange { background: linear-gradient(135deg, #FDCB6E, #E17055); }
.community-icon { font-size: 32px; margin-bottom: 10px; }
.community-name { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.community-count { font-size: 12px; opacity: 0.85; }

/* ===== 社交分享 ===== */
.share-section {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}
.share-title { font-size: 15px; color: var(--text-mid); margin-bottom: 16px; }
.share-buttons { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  transition: var(--transition);
}
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.share-btn.wechat { background: #07C160; }
.share-btn.weibo { background: #E6162D; }
.share-btn.douyin { background: #010101; }
.share-btn.bilibili { background: #00A1D6; }
.share-btn.qq { background: #1D7FE5; }

/* ===== 底部 ===== */
.site-footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text { color: #fff; -webkit-text-fill-color: #fff; }
.footer-brand p {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-top: 12px;
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--primary-light); }
.footer-links { display: flex; gap: 20px; }
.update-time { font-size: 12px; color: rgba(255,255,255,0.4); }

/* ===== 视频播放页 ===== */
.video-player-wrap {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16/9;
  position: relative;
}
.video-player-wrap video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.video-player-wrap iframe {
  width: 100%;
  height: 100%;
  border: none;
}
.video-detail-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 30px;
  align-items: start;
}
.video-detail-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-dark);
  margin: 16px 0 10px;
  line-height: 1.4;
}
.video-detail-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-mid);
  flex-wrap: wrap;
}
.video-detail-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  border: 1.5px solid var(--border);
  color: var(--text-dark);
  transition: var(--transition);
}
.action-btn:hover { border-color: var(--primary); color: var(--primary); }
.action-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.video-desc-box {
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.7;
}
.sidebar-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}
.sidebar-video-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-video-item {
  display: flex;
  gap: 12px;
  cursor: pointer;
  transition: var(--transition);
}
.sidebar-video-item:hover .sidebar-video-title { color: var(--primary); }
.sidebar-thumb {
  width: 100px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.sidebar-video-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sidebar-video-meta { font-size: 11px; color: var(--text-light); margin-top: 4px; }

/* ===== 分页 ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  border: 1.5px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.page-btn:hover, .page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ===== 标签云 ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block;
  background: var(--bg-light);
  color: var(--text-mid);
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.tag:hover, .tag.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ===== 横幅广告位 ===== */
.banner-ad {
  background: linear-gradient(135deg, var(--primary-light), #FFD6DC);
  border-radius: var(--radius);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.banner-ad-text h3 { font-size: 20px; font-weight: 800; color: var(--text-dark); margin-bottom: 6px; }
.banner-ad-text p { font-size: 14px; color: var(--text-mid); }

/* ===== 加入社区引导 ===== */
.join-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.join-step {
  text-align: center;
  padding: 24px 16px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 2px 12px var(--shadow-dark);
  position: relative;
}
.join-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 28px;
  text-align: center;
}
.join-step-icon { font-size: 32px; margin-bottom: 12px; }
.join-step-title { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.join-step-desc { font-size: 13px; color: var(--text-mid); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .video-detail-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .header-inner { height: 58px; gap: 12px; }
  .main-nav { display: none; }
  .search-wrap { min-width: 140px; }
  .hero { min-height: 420px; }
  .hero h1 { font-size: 26px; }
  .section { padding: 40px 0; }
  .section-title { font-size: 24px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-stats { gap: 24px; }
  .mobile-menu-btn { display: flex; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
}

/* ===== 移动端菜单按钮 ===== */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}
.mobile-nav {
  display: none;
  position: fixed;
  top: 58px;
  left: 0;
  right: 0;
  background: #fff;
  box-shadow: 0 8px 30px var(--shadow-dark);
  z-index: 999;
  padding: 16px 20px;
}
.mobile-nav.show { display: block; }
.mobile-nav a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border);
}
.mobile-nav a:hover { color: var(--primary); }

/* ===== 懒加载占位 ===== */
img[loading="lazy"] { background: var(--bg-light); }

/* ===== 视频播放弹窗 ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.show { display: flex; }
.modal-box {
  background: #000;
  border-radius: var(--radius);
  width: 100%;
  max-width: 900px;
  position: relative;
}
.modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
  opacity: 0.8;
}
.modal-close:hover { opacity: 1; }
.modal-video {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius);
}

/* ===== 加载动画 ===== */
.skeleton {
  background: linear-gradient(90deg, var(--bg-light) 25%, #e9ecef 50%, var(--bg-light) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 16px var(--shadow);
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 100;
}
.back-to-top.show { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ===== 通用工具类 ===== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.bg-light { background: var(--bg-light); }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-12 { gap: 12px; }
.hidden { display: none; }

/* ===== 专家卡片 ===== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  overflow: hidden;
  display: flex;
  transition: var(--transition);
  box-shadow: 0 2px 16px var(--shadow-dark);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(255,107,129,0.2); }
.expert-photo { width: 200px; height: 220px; object-fit: cover; flex-shrink: 0; }
.expert-info { padding: 20px; flex: 1; }
.expert-name { font-size: 20px; font-weight: 900; 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-mid); line-height: 1.7; margin-bottom: 12px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.award-tag {
  font-size: 11px;
  background: linear-gradient(135deg, rgba(255,107,129,0.1), rgba(108,92,231,0.1));
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 600;
}
.expert-actions { display: flex; gap: 8px; }
.btn-sm {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: none;
}
.btn-sm.primary { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; }
.btn-sm.outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-sm.primary:hover { opacity: 0.85; color: #fff; }
.btn-sm.outline:hover { background: var(--primary); color: #fff; }

/* ===== 社区卡片 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.community-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  color: #fff;
  transition: var(--transition);
}
.community-card:hover { transform: translateY(-4px) scale(1.02); box-shadow: 0 12px 32px rgba(255,107,129,0.4); }
.community-card.green { background: linear-gradient(135deg, #00B894, #00CEC9); }
.community-card.purple { background: linear-gradient(135deg, #6C5CE7, #A29BFE); }
.community-card.orange { background: linear-gradient(135deg, #E17055, #FDCB6E); }
.community-icon { font-size: 36px; margin-bottom: 12px; }
.community-name { font-size: 16px; font-weight: 800; margin-bottom: 6px; }
.community-count { font-size: 13px; opacity: 0.85; }

/* ===== 加入步骤 ===== */
.join-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.join-steps::before {
  content: '';
  position: absolute;
  top: 36px; left: 12.5%; right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 0;
}
.join-step { text-align: center; position: relative; z-index: 1; }
.join-step-icon {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(255,107,129,0.4);
  border: 4px solid #fff;
}
.join-step-title { font-size: 16px; font-weight: 800; color: var(--text-dark); margin-bottom: 8px; }
.join-step-desc { font-size: 13px; color: var(--text-mid); line-height: 1.6; }

/* ===== 合作品牌 ===== */
.partner-logos { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.partner-logo {
  padding: 14px 24px;
  background: var(--bg-light);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-mid);
  transition: var(--transition);
}
.partner-logo:hover { background: linear-gradient(135deg, rgba(255,107,129,0.08), rgba(108,92,231,0.08)); border-color: var(--primary); color: var(--primary); }

/* ===== 评价卡片 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  border: 1.5px solid var(--border);
  transition: var(--transition);
  box-shadow: 0 2px 16px var(--shadow-dark);
}
.review-card:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(255,107,129,0.15); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.reviewer-avatar {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800; color: #fff; flex-shrink: 0;
}
.reviewer-name { font-size: 15px; font-weight: 700; color: var(--text-dark); }
.reviewer-date { font-size: 12px; color: var(--text-light); }
.review-stars { color: #FDCB6E; font-size: 15px; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 12px; }
.review-tag {
  font-size: 11px;
  background: linear-gradient(135deg, rgba(255,107,129,0.1), rgba(108,92,231,0.1));
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 600;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(255,107,129,0.3); }
.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;
  background: #fff;
  transition: var(--transition);
}
.faq-question:hover { background: var(--bg-light); color: var(--primary); }
.faq-icon { font-size: 20px; color: var(--primary); font-weight: 400; transition: transform 0.3s; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.8;
  background: #fff;
}
.faq-item.open .faq-answer { display: block; }

/* ===== 联系方式 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.contact-info-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  border: 1.5px solid var(--border);
  box-shadow: 0 2px 16px var(--shadow-dark);
}
.contact-info-card h3 {
  font-size: 18px; font-weight: 800; color: var(--text-dark);
  margin-bottom: 20px; padding-bottom: 12px; border-bottom: 2px solid var(--border);
}
.contact-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--bg-light);
}
.contact-item:last-child { border-bottom: none; }
.contact-item-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, rgba(255,107,129,0.12), rgba(108,92,231,0.12));
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}
.contact-item-label { font-size: 12px; color: var(--text-light); margin-bottom: 2px; }
.contact-item-value { font-size: 14px; font-weight: 600; color: var(--text-dark); }
.qr-codes { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 90px; height: 90px; border-radius: 8px; border: 1px solid var(--border); }
.qr-label { font-size: 12px; color: var(--text-mid); margin-top: 6px; }

/* ===== 分享区域 ===== */
.share-section { text-align: center; }
.share-title { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; }
.share-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.share-btn {
  padding: 9px 20px; border-radius: 20px; font-size: 13px; font-weight: 700;
  cursor: pointer; transition: var(--transition); border: 1.5px solid; color: #fff;
}
.share-btn.wechat { background: #07C160; border-color: #07C160; }
.share-btn.weibo { background: #E6162D; border-color: #E6162D; }
.share-btn.douyin { background: #010101; border-color: #010101; }
.share-btn.bilibili { background: #00A1D6; border-color: #00A1D6; }
.share-btn.qq { background: #12B7F5; border-color: #12B7F5; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); color: #fff; }

/* ===== 分页 ===== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.page-btn {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer;
  background: var(--bg-light); color: var(--text-dark);
  border: 1.5px solid var(--border); transition: var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border-color: transparent;
}

/* ===== 标签云 ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 6px 14px; border-radius: 20px; font-size: 13px; font-weight: 600;
  cursor: pointer; background: var(--bg-light); color: var(--text-mid);
  border: 1.5px solid var(--border); transition: var(--transition);
}
.tag:hover, .tag.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border-color: transparent;
}

/* ===== 页脚 ===== */
.site-footer {
  background: linear-gradient(135deg, #1a1a2e 0%, #2D3436 100%);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.55); max-width: 280px; }
.footer-col h4 {
  font-size: 15px; font-weight: 800; color: #fff;
  margin-bottom: 16px; padding-bottom: 8px;
  border-bottom: 2px solid rgba(255,107,129,0.4);
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 13px; color: rgba(255,255,255,0.55); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: rgba(255,255,255,0.4);
}
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: rgba(255,255,255,0.4); transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); }
.update-time { color: rgba(255,255,255,0.4); font-size: 12px; }

/* ===== 响应式补充 ===== */
@media (max-width: 1024px) {
  .expert-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .join-steps { grid-template-columns: repeat(2, 1fr); }
  .join-steps::before { display: none; }
  .review-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .expert-card { flex-direction: column; }
  .expert-photo { width: 100%; height: 200px; }
}
@media (max-width: 480px) {
  .community-grid { grid-template-columns: 1fr; }
  .join-steps { grid-template-columns: 1fr; }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--primary), var(--accent)); border-radius: 3px; }
::selection { background: rgba(255,107,129,0.2); color: var(--primary); }