/* =====================================================
   糖心vlog - 主样式文件
   品牌色系：玫瑰红 #E8436A / 珊瑚橙 #FF7B54 / 深紫 #1A1A2E
   ===================================================== */

/* ---- CSS变量 ---- */
:root {
  --brand-primary: #E8436A;
  --brand-secondary: #FF7B54;
  --brand-dark: #1A1A2E;
  --brand-mid: #16213E;
  --brand-accent: #0F3460;
  --brand-light: #FFF0F3;
  --brand-pink: #FFB3C6;
  --text-primary: #1A1A2E;
  --text-secondary: #555;
  --text-light: #888;
  --white: #fff;
  --border: #eee;
  --shadow: 0 4px 20px rgba(232,67,106,0.12);
  --shadow-hover: 0 8px 32px rgba(232,67,106,0.22);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: all 0.3s ease;
  --gradient: linear-gradient(135deg, #E8436A 0%, #FF7B54 100%);
  --gradient-dark: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
}

/* ---- 重置与基础 ---- */
*, *::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-primary);
  background: #fff;
  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; }
input, textarea { outline: none; border: none; }

/* ---- 容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

/* ---- 通用标题 ---- */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  position: relative;
}
.section-title span { color: var(--brand-primary); }
.section-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 2.5rem;
}
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.section-header .more-link {
  color: var(--brand-primary);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.section-header .more-link:hover { text-decoration: underline; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(232,67,106,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(232,67,106,0.45);
  color: #fff;
}
.btn-outline {
  border: 2px solid var(--brand-primary);
  color: var(--brand-primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--brand-primary);
  color: #fff;
}
.btn-dark {
  background: var(--brand-dark);
  color: #fff;
}
.btn-dark:hover { background: var(--brand-accent); color: #fff; }

/* ---- 标签 ---- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--brand-light);
  color: var(--brand-primary);
}
.tag-hot { background: #fff0f0; color: #e00; }
.tag-new { background: #f0fff4; color: #0a0; }

/* ============================================================
   顶部公告栏
   ============================================================ */
.top-notice {
  background: var(--gradient);
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.top-notice a { color: #ffe; text-decoration: underline; }

/* ============================================================
   导航栏
   ============================================================ */
.site-header {
  background: #fff;
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
  max-width: 1400px;
  margin: 0 auto;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-img { height: 44px; width: auto; }
.logo-favicon { height: 32px; width: 32px; display: none; }
.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  transition: var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
  background: var(--brand-light);
  color: var(--brand-primary);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.header-actions .btn { padding: 8px 18px; font-size: 0.88rem; }

/* ---- 搜索框 ---- */
.search-bar-wrap {
  background: #f7f8fa;
  border-bottom: 1px solid #eee;
  padding: 10px 20px;
}
.search-bar-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-form {
  display: flex;
  align-items: center;
  background: #fff;
  border: 2px solid #eee;
  border-radius: 50px;
  overflow: hidden;
  flex: 1;
  max-width: 600px;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--brand-primary); }
.search-input {
  flex: 1;
  padding: 9px 18px;
  font-size: 0.95rem;
  background: transparent;
  color: var(--text-primary);
}
.search-input::placeholder { color: #aaa; }
.search-btn {
  padding: 9px 20px;
  background: var(--gradient);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 0 50px 50px 0;
  transition: var(--transition);
}
.search-btn:hover { opacity: 0.9; }
.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.search-hot-tags span { font-size: 0.82rem; color: var(--text-light); }
.search-hot-tags a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 3px 10px;
  border-radius: 50px;
  background: #eee;
  transition: var(--transition);
}
.search-hot-tags a:hover { background: var(--brand-light); color: var(--brand-primary); }

/* ---- 移动端菜单按钮 ---- */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   Hero 轮播区
   ============================================================ */
.hero-section {
  position: relative;
  overflow: hidden;
  background: var(--gradient-dark);
}
.hero-slider { position: relative; height: 520px; }
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(26,26,46,0.85) 40%, transparent 100%);
  display: flex;
  align-items: center;
}
.hero-content {
  max-width: 600px;
  padding: 0 60px;
  color: #fff;
}
.hero-content .badge {
  display: inline-block;
  background: var(--brand-primary);
  color: #fff;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: 1px;
}
.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.hero-content p {
  font-size: 1.05rem;
  opacity: 0.85;
  margin-bottom: 1.8rem;
  line-height: 1.7;
}
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}
.hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
}
.hero-dot.active { background: var(--brand-primary); width: 24px; border-radius: 4px; }

/* ============================================================
   统计数据区
   ============================================================ */
.stats-section {
  background: var(--gradient-dark);
  padding: 40px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 20px;
  border-right: 1px solid rgba(255,255,255,0.1);
  color: #fff;
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.65); }

/* ============================================================
   视频卡片
   ============================================================ */
.video-section { padding: 60px 0; }
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.video-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #111;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.25);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(232,67,106,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--brand-primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-light);
}
.video-stats { display: flex; gap: 10px; }
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* ============================================================
   分类导航标签
   ============================================================ */
.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.cat-tab {
  padding: 7px 18px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 500;
  background: #f5f5f5;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.cat-tab:hover,
.cat-tab.active {
  background: var(--brand-light);
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}

/* ============================================================
   专家展示区
   ============================================================ */
.experts-section {
  padding: 60px 0;
  background: #f9f9fb;
}
.experts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.expert-header {
  background: var(--gradient-dark);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.expert-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--brand-primary);
}
.expert-basic h3 { color: #fff; font-size: 1.1rem; font-weight: 700; }
.expert-basic .title { color: var(--brand-pink); font-size: 0.85rem; margin-top: 2px; }
.expert-body { padding: 20px; }
.expert-body p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; }
.expert-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.expert-actions { display: flex; gap: 10px; }
.expert-actions .btn { padding: 7px 16px; font-size: 0.82rem; }

/* ============================================================
   社区功能区
   ============================================================ */
.community-section { padding: 60px 0; }
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.community-card {
  border-radius: var(--radius);
  padding: 28px;
  background: #fff;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid transparent;
}
.community-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-top-color: var(--brand-primary);
}
.community-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: var(--brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.community-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.community-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* ============================================================
   AI赋能区
   ============================================================ */
.ai-section {
  padding: 60px 0;
  background: var(--gradient-dark);
  color: #fff;
}
.ai-section .section-title { color: #fff; }
.ai-section .section-subtitle { color: rgba(255,255,255,0.6); }
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ai-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.ai-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--brand-primary);
  transform: translateY(-4px);
}
.ai-icon { font-size: 2rem; margin-bottom: 14px; }
.ai-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
.ai-card p { font-size: 0.88rem; color: rgba(255,255,255,0.65); line-height: 1.6; }

/* ============================================================
   合作品牌Logo墙
   ============================================================ */
.partners-section { padding: 50px 0; background: #f9f9fb; }
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: var(--transition);
  border: 1px solid #eee;
}
.partner-item:hover { color: var(--brand-primary); border-color: var(--brand-primary); transform: translateY(-2px); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-section { padding: 60px 0; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  gap: 12px;
  transition: var(--transition);
}
.faq-question:hover { color: var(--brand-primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--brand-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: var(--transition);
  font-weight: 700;
}
.faq-item.open .faq-icon { background: var(--brand-primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding: 0 0 18px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.faq-item.open .faq-answer { display: block; }

/* ============================================================
   用户评价
   ============================================================ */
.reviews-section { padding: 60px 0; background: #f9f9fb; }
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.review-name { font-weight: 600; font-size: 0.95rem; }
.review-date { font-size: 0.78rem; color: var(--text-light); }
.review-stars { color: #FFB800; font-size: 0.9rem; margin-bottom: 10px; }
.review-text { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }

/* ============================================================
   联系我们
   ============================================================ */
.contact-section { padding: 60px 0; }
.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: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}
.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-detail .label { font-size: 0.8rem; color: var(--text-light); }
.contact-detail .value { font-size: 0.95rem; font-weight: 500; color: var(--text-primary); }
.qr-group { display: flex; gap: 20px; margin-top: 20px; }
.qr-item { text-align: center; }
.qr-img {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: #aaa;
  overflow: hidden;
}
.qr-img img { width: 100%; height: 100%; object-fit: cover; }
.qr-label { font-size: 0.78rem; color: var(--text-light); margin-top: 6px; }
.contact-map {
  border-radius: var(--radius);
  overflow: hidden;
  height: 280px;
  background: #eee;
  position: relative;
}
.contact-map img { width: 100%; height: 100%; object-fit: cover; }

/* ============================================================
   社交分享
   ============================================================ */
.share-section { padding: 40px 0; background: var(--brand-light); }
.share-inner { text-align: center; }
.share-inner h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 16px; }
.share-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.share-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  transition: var(--transition);
}
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; color: #fff; }
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #000; }
.share-bilibili { background: #00A1D6; }
.share-qq { background: #12B7F5; }

/* ============================================================
   How-To加入社区指南
   ============================================================ */
.howto-section { padding: 60px 0; background: #f9f9fb; }
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.howto-step {
  text-align: center;
  padding: 28px 20px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
}
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
}
.howto-step h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.howto-step p { font-size: 0.85rem; color: var(--text-secondary); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--gradient-dark);
  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; font-size: 1.4rem; margin-bottom: 12px; display: block; }
.footer-brand p { font-size: 0.88rem; line-height: 1.8; margin-bottom: 16px; }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.88rem; color: rgba(255,255,255,0.65); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--brand-primary); }
.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: 0.82rem;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--brand-primary); }
.footer-logo-bottom { height: 36px; opacity: 0.8; }

/* ============================================================
   视频播放页
   ============================================================ */
.video-player-wrap {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}
.video-player-wrap video,
.video-player-wrap iframe {
  width: 100%;
  aspect-ratio: 16/9;
  display: block;
}
.video-detail-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 28px;
  align-items: start;
}
.video-detail-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 10px; }
.video-detail-meta { display: flex; gap: 16px; font-size: 0.85rem; color: var(--text-light); margin-bottom: 16px; flex-wrap: wrap; }
.video-detail-desc { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.8; }
.sidebar-title { font-size: 1rem; font-weight: 700; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--brand-primary); }
.sidebar-video-list { display: flex; flex-direction: column; gap: 14px; }
.sidebar-video-item { display: flex; gap: 12px; cursor: pointer; }
.sidebar-video-item:hover .sidebar-video-title { color: var(--brand-primary); }
.sidebar-video-thumb { width: 110px; height: 62px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; }
.sidebar-video-thumb img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-video-title { font-size: 0.85rem; font-weight: 500; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-video-meta { font-size: 0.75rem; color: var(--text-light); margin-top: 4px; }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.85rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--brand-primary); }
.breadcrumb .sep { color: #ccc; }
.breadcrumb .current { color: var(--text-primary); font-weight: 500; }

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: 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: 0.9rem;
  font-weight: 500;
  background: #f5f5f5;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid #eee;
}
.page-btn:hover,
.page-btn.active {
  background: var(--brand-primary);
  color: #fff;
  border-color: var(--brand-primary);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1200px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 992px) {
  .hero-content h1 { font-size: 2rem; }
  .hero-slider { height: 400px; }
  .hero-content { padding: 0 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .video-detail-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: 16px;
    z-index: 999;
    gap: 4px;
  }
  .menu-toggle { display: flex; }
  .header-inner { flex-wrap: wrap; position: relative; }
  .header-actions .btn:not(.btn-primary) { display: none; }
  .hero-slider { height: 320px; }
  .hero-content { padding: 0 24px; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-content p { font-size: 0.9rem; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .experts-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 1.6rem; }
  .search-hot-tags { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .hero-btns .btn:nth-child(2) { display: none; }
  .stat-num { font-size: 1.8rem; }
}

/* ============================================================
   工具类
   ============================================================ */
.text-center { text-align: center; }
.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.py-section { padding: 60px 0; }
.bg-light { background: #f9f9fb; }
.bg-dark { background: var(--gradient-dark); }
.hidden { display: none; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 16px; }

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
.pulse { animation: pulse 2s infinite; }

/* 直播标签 */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #e00;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: pulse 1s infinite;
}

/* ============================================================
   H1可见区
   ============================================================ */
.h1-section {
  background: linear-gradient(135deg, #fff0f3 0%, #fff 100%);
  padding: 28px 0 18px;
  border-bottom: 1px solid #ffd6e0;
}
.site-h1 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--brand-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}
.site-h1-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   页面Hero（内页顶部大标题区）
   ============================================================ */
.page-hero {
  padding: 60px 0 50px;
  color: #fff;
}
.page-hero h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.page-hero p {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  max-width: 700px;
  line-height: 1.8;
}

/* ============================================================
   面包屑导航
   ============================================================ */
.breadcrumb-wrap {
  background: #f9f9fb;
  border-bottom: 1px solid #eee;
  padding: 10px 0;
}
.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--brand-primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text-secondary); font-weight: 600; }

/* ============================================================
   子导航标签（内页分类）
   ============================================================ */
.sub-nav-section {
  background: #fff;
  border-bottom: 2px solid #f0f0f0;
  padding: 0;
  position: sticky;
  top: 70px;
  z-index: 90;
}
.sub-nav-tabs {
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.sub-nav-tabs::-webkit-scrollbar { display: none; }
.sub-tab {
  padding: 14px 22px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
}
.sub-tab:hover { color: var(--brand-primary); }
.sub-tab.active {
  color: var(--brand-primary);
  border-bottom-color: var(--brand-primary);
  font-weight: 700;
}

/* ============================================================
   直播专区
   ============================================================ */
.live-section { padding: 60px 0; background: #fff; }
.live-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.live-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.live-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.live-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.live-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.live-card:hover .live-thumb img { transform: scale(1.05); }
.live-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: #FF4500;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  animation: livePulse 1.5s ease-in-out infinite;
}
@keyframes livePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.live-viewers {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 20px;
}
.live-info { padding: 16px; }
.live-info h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; line-height: 1.4; }
.live-host { font-size: 0.82rem; color: var(--text-light); }

/* 直播页全宽卡片 */
.live-grid-full {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.live-card-full {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.live-card-full:hover { box-shadow: var(--shadow-hover); }
.live-card-full .live-thumb { aspect-ratio: 16/9; }
.live-card-full .live-info {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.live-card-full .live-info h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.live-card-full .live-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin: 10px 0; }
.live-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.live-danmu-preview {
  position: absolute;
  bottom: 40px;
  left: 0;
  right: 0;
  padding: 0 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.live-danmu-preview span {
  background: rgba(0,0,0,0.5);
  color: #fff;
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 12px;
  display: inline-block;
  width: fit-content;
}

/* ============================================================
   弹幕墙
   ============================================================ */
.danmu-section {
  margin-top: 40px;
  padding: 30px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
}
.danmu-title {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
}
.danmu-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  min-height: 80px;
  align-items: center;
}
.danmu-item {
  background: rgba(232,67,106,0.15);
  border: 1px solid rgba(232,67,106,0.3);
  color: #fff;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  animation: danmuFloat 3s ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}
@keyframes danmuFloat {
  0%, 100% { transform: translateY(0); opacity: 0.8; }
  50% { transform: translateY(-4px); opacity: 1; }
}
.danmu-showcase .danmu-item {
  background: rgba(232,67,106,0.2);
  border-color: rgba(232,67,106,0.4);
}

/* ============================================================
   影视传媒专区
   ============================================================ */
.media-section { padding: 60px 0; background: #f9f9fb; }
.media-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.media-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 4px solid transparent;
}
.media-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-left-color: var(--brand-primary);
}
.media-icon { font-size: 2rem; margin-bottom: 14px; }
.media-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.media-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; }
.media-link { color: var(--brand-primary); font-size: 0.88rem; font-weight: 600; }
.media-link:hover { text-decoration: underline; }

/* ============================================================
   娱乐专区
   ============================================================ */
.entertainment-section { padding: 60px 0; }
.ent-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.ent-card { border-radius: var(--radius); overflow: hidden; position: relative; }
.ent-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.ent-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.ent-card:hover .ent-thumb img { transform: scale(1.08); }
.ent-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,26,46,0.95) 0%, rgba(26,26,46,0.3) 60%, transparent 100%);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #fff;
}
.ent-overlay h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; }
.ent-overlay p { font-size: 0.85rem; color: rgba(255,255,255,0.75); margin-bottom: 14px; line-height: 1.6; }

/* ============================================================
   专家团队（5列）
   ============================================================ */
.experts-section { padding: 60px 0; background: #f9f9fb; }
.experts-grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

/* ============================================================
   SEO文章区
   ============================================================ */
.seo-article-section { padding: 50px 0; background: #fff; }
.seo-article {
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.9;
}
.seo-article h3 { font-size: 1.3rem; font-weight: 700; color: var(--brand-dark); margin: 24px 0 12px; }
.seo-article h4 { font-size: 1.1rem; font-weight: 700; color: var(--brand-dark); margin: 20px 0 10px; }
.seo-article h5 { font-size: 1rem; font-weight: 700; color: var(--brand-primary); margin: 16px 0 8px; }
.seo-article h6 { font-size: 0.95rem; font-weight: 700; color: var(--text-secondary); margin: 14px 0 8px; }
.seo-article p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 14px; }
.seo-article strong { color: var(--brand-dark); }

/* ============================================================
   社区链接
   ============================================================ */
.community-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--brand-primary);
  font-size: 0.88rem;
  font-weight: 600;
}
.community-link:hover { text-decoration: underline; }

/* ============================================================
   响应式补充
   ============================================================ */
@media (max-width: 1100px) {
  .experts-grid-5 { grid-template-columns: repeat(3, 1fr); }
  .live-card-full { grid-template-columns: 300px 1fr; }
}
@media (max-width: 900px) {
  .media-grid { grid-template-columns: repeat(2, 1fr); }
  .live-grid { grid-template-columns: repeat(2, 1fr); }
  .experts-grid-5 { grid-template-columns: repeat(2, 1fr); }
  .live-card-full { grid-template-columns: 1fr; }
  .live-card-full .live-thumb { aspect-ratio: 16/9; }
  .ent-grid { grid-template-columns: 1fr; }
  .site-h1 { font-size: 1.3rem; }
  .page-hero h1 { font-size: 1.5rem; }
}
@media (max-width: 640px) {
  .media-grid { grid-template-columns: 1fr; }
  .live-grid { grid-template-columns: 1fr; }
  .experts-grid-5 { grid-template-columns: 1fr 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .page-hero { padding: 40px 0 30px; }
  .page-hero h1 { font-size: 1.25rem; }
  .sub-tab { padding: 12px 14px; font-size: 0.85rem; }
}