/* =============================================
   同人动漫 主样式文件 | cinesp.cn
   原创设计 - 暗黑动漫影视传媒主题
   ============================================= */

/* ---- CSS变量 ---- */
:root {
  --primary: #C0392B;
  --primary-dark: #922B21;
  --primary-light: #E74C3C;
  --accent: #D4A017;
  --accent-light: #F1C40F;
  --dark-1: #0A0A0F;
  --dark-2: #12121A;
  --dark-3: #1A1A26;
  --dark-4: #222235;
  --card-bg: #16161F;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(192,57,43,0.4);
  --text-primary: #F0F0F8;
  --text-secondary: #C0C0D0;
  --text-muted: #808090;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 40px rgba(192,57,43,0.2);
  --transition: 0.25s ease;
}

/* ---- 全局重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: var(--dark-1);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; }

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

/* =============================================
   HEADER 头部
   ============================================= */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,10,15,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.site-logo img {
  height: 42px;
  width: auto;
  object-fit: contain;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
  background: rgba(192,57,43,0.15);
}
.main-nav a.active { color: var(--primary-light); }
.header-search {
  display: flex;
  align-items: center;
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 6px 14px;
  gap: 8px;
  min-width: 220px;
  transition: border-color var(--transition);
}
.header-search:focus-within { border-color: var(--primary); }
.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.88rem;
  flex: 1;
  min-width: 0;
}
.header-search input::placeholder { color: var(--text-muted); }
.search-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 4px 12px;
  font-size: 0.82rem;
  transition: background var(--transition);
}
.search-btn:hover { background: var(--primary-dark); }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* 搜索栏 */
.header-search-bar {
  background: var(--dark-2);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}
.search-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.search-full {
  display: flex;
  align-items: center;
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 8px 16px;
  gap: 8px;
  flex: 1;
  min-width: 260px;
  transition: border-color var(--transition);
}
.search-full:focus-within { border-color: var(--primary); }
.search-full input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  flex: 1;
}
.search-full input::placeholder { color: var(--text-muted); }
.search-full-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background var(--transition);
}
.search-full-btn:hover { background: var(--primary-dark); }
.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.search-hot-tags a {
  color: var(--text-muted);
  background: var(--dark-3);
  padding: 3px 10px;
  border-radius: 50px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  font-size: 0.8rem;
}
.search-hot-tags a:hover {
  color: var(--primary-light);
  border-color: var(--primary);
  background: rgba(192,57,43,0.1);
}

/* =============================================
   HERO 首页主视觉
   ============================================= */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0A0010 0%, #0A0A1A 40%, #100A00 100%);
}
.hero-bg-img {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,0,16,0.9) 0%, rgba(10,10,26,0.5) 60%, transparent 100%);
}
.hero-content { max-width: 680px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(192,57,43,0.15);
  border: 1px solid rgba(192,57,43,0.4);
  color: var(--primary-light);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-title .brand { color: var(--primary-light); }
.hero-title .keyword {
  color: var(--accent);
  position: relative;
}
.hero-title .keyword::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}
.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.8;
  max-width: 560px;
}
.hero-stats {
  display: flex;
  gap: 28px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}
.hero-stat-item { text-align: center; }
.hero-stat-num {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.hero-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* =============================================
   BUTTONS 按钮
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 24px;
  border-radius: 50px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 2px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
  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);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(192,57,43,0.4);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.2);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: rgba(192,57,43,0.08);
}
.btn-accent {
  background: var(--accent);
  color: #1A1A00;
  border-color: var(--accent);
  font-weight: 700;
}
.btn-accent:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
  color: #1A1A00;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212,160,23,0.4);
}

/* =============================================
   STATS BAR 数据统计栏
   ============================================= */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: -20px 0 0;
  position: relative;
  z-index: 2;
}
.stat-item {
  padding: 22px 20px;
  text-align: center;
  border-right: 1px solid var(--border);
  transition: background var(--transition);
}
.stat-item:last-child { border-right: none; }
.stat-item:hover { background: rgba(192,57,43,0.05); }
.stat-num {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* =============================================
   SECTIONS 通用区块
   ============================================= */
.section { padding: 70px 0; }
.section-alt { background: var(--dark-2); }
.section-header { margin-bottom: 40px; }
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-title span { color: var(--primary-light); }
.divider {
  width: 50px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  margin-bottom: 14px;
}
.section-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 600px;
}

/* =============================================
   VIDEO CARDS 视频卡片
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.video-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}
.video-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
  background: var(--dark-3);
}
.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(1.05); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background var(--transition);
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.45); }
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(192,57,43,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition);
}
.play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-card:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px 16px; }
.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--text-primary);
  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: 0.78rem;
  color: var(--text-muted);
}
.video-stats { display: flex; gap: 10px; }

/* =============================================
   TAGS 标签
   ============================================= */
.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.08);
  color: var(--text-muted);
}
.tag-anime { background: rgba(192,57,43,0.15); color: var(--primary-light); }
.tag-hot { background: rgba(212,160,23,0.15); color: var(--accent); }
.tag-new { background: rgba(39,174,96,0.15); color: #2ECC71; }

/* =============================================
   FILTER BAR 过滤按钮栏
   ============================================= */
.anime-filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.filter-btn {
  background: var(--dark-3);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 7px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
}
.filter-btn:hover,
.filter-btn.active {
  background: rgba(192,57,43,0.15);
  border-color: var(--primary);
  color: var(--primary-light);
}

/* =============================================
   FEATURE CARDS 功能卡片
   ============================================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
  line-height: 1;
}
.feature-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.feature-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* =============================================
   COMMUNITY FEATURES 社区功能
   ============================================= */
.community-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.community-feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all var(--transition);
}
.community-feature-item:hover {
  border-color: var(--border-hover);
  background: rgba(192,57,43,0.04);
}
.cf-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 2px;
}
.cf-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.cf-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* =============================================
   EXPERT CARDS 专家卡片
   ============================================= */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
}
.expert-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid rgba(192,57,43,0.3);
}
.expert-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.expert-title {
  font-size: 0.82rem;
  color: var(--primary-light);
  margin-bottom: 12px;
  font-weight: 500;
}
.expert-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
}
.expert-awards {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.expert-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}
.expert-actions .btn { padding: 8px 16px; font-size: 0.82rem; }

/* =============================================
   PARTNER GRID 合作品牌
   ============================================= */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
}
.partner-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 14px;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.partner-item:hover {
  border-color: var(--border-hover);
  color: var(--primary-light);
  background: rgba(192,57,43,0.05);
}

/* =============================================
   HOW TO STEPS 加入步骤
   ============================================= */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  position: relative;
}
.howto-step {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: all var(--transition);
}
.howto-step:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}
.howto-icon {
  font-size: 2.4rem;
  margin-bottom: 14px;
  line-height: 1;
}
.howto-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.howto-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* =============================================
   REVIEW CARDS 用户评价
   ============================================= */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}
.review-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}
.review-stars {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.review-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name {
  font-size: 0.88rem;
  font-weight: 600;
}
.review-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* =============================================
   FAQ 手风琴
   ============================================= */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: rgba(192,57,43,0.3); }
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  gap: 12px;
  transition: background var(--transition);
}
.faq-question:hover { background: rgba(192,57,43,0.05); }
.faq-arrow {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); color: var(--primary-light); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer-inner {
  padding: 0 22px 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* =============================================
   CONTACT 联系
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.contact-info-block {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.contact-label { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 3px; }
.contact-value { font-size: 0.9rem; font-weight: 500; color: var(--text-primary); }

/* =============================================
   TOOL CARDS 工具卡片
   ============================================= */
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tool-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.tool-icon { font-size: 2.4rem; line-height: 1; }
.tool-name { font-size: 0.95rem; font-weight: 700; }
.tool-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; flex: 1; }

/* =============================================
   BREADCRUMB 面包屑
   ============================================= */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-secondary); }

/* =============================================
   PAGE HERO 内页标题区
   ============================================= */
.page-hero {
  background: linear-gradient(135deg, var(--dark-2), var(--dark-3));
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
}

/* =============================================
   SHARE SECTION 分享区
   ============================================= */
.share-section {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.share-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.share-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.share-btn {
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--dark-3);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.share-btn:hover { transform: translateY(-2px); }
.share-btn.wechat:hover { background: rgba(7,193,96,0.15); border-color: #07C160; color: #07C160; }
.share-btn.weibo:hover { background: rgba(230,22,45,0.15); border-color: #E6162D; color: #E6162D; }
.share-btn.douyin:hover { background: rgba(0,0,0,0.3); border-color: #69C9D0; color: #69C9D0; }
.share-btn.bilibili:hover { background: rgba(0,161,214,0.15); border-color: #00A1D6; color: #00A1D6; }

/* =============================================
   FOOTER 页脚
   ============================================= */
#site-footer {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 50px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 14px;
  margin-bottom: 8px;
}
.footer-logo { margin-bottom: 4px; }
.footer-qr-row { display: flex; gap: 16px; margin-top: 16px; }
.footer-qr-item { text-align: center; }
.footer-qr-item img { border-radius: 8px; margin-bottom: 6px; }
.footer-qr-item span { font-size: 0.75rem; color: var(--text-muted); display: block; }
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a {
  font-size: 0.84rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--primary-light); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary-light); }
.footer-update { color: var(--text-muted); font-size: 0.8rem; }

/* =============================================
   ANIMATIONS 动画
   ============================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-up {
  animation: fadeInUp 0.6s ease both;
}
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* =============================================
   RESPONSIVE 响应式
   ============================================= */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .header-search { display: none; }
  .menu-toggle { display: flex; }
  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10,10,15,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
    z-index: 999;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; font-size: 1rem; }
  .hero-section { min-height: 420px; }
  .hero-title { font-size: 1.8rem; }
  .hero-stats { gap: 16px; }
  .hero-stat-num { font-size: 1.2rem; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 50px 0; }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .community-features { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .search-bar-inner { flex-direction: column; align-items: stretch; }
  .search-full { min-width: 0; }
  .howto-steps { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  /* AI区域 */
  #ai-section .container > div { grid-template-columns: 1fr !important; }
  #community-section .container > div { grid-template-columns: 1fr !important; }
  .about-grid { grid-template-columns: 1fr !important; }
}

@media (max-width: 480px) {
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .stat-num { font-size: 1.3rem; }
  .section-title { font-size: 1.4rem; }
  .hero-badge { font-size: 0.75rem; }
  .hero-desc { font-size: 0.9rem; }
  .btn { padding: 10px 18px; font-size: 0.88rem; }
}

/* =============================================
   滚动条美化
   ============================================= */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--dark-1); }
::-webkit-scrollbar-thumb { background: var(--dark-4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* =============================================
   选中文字颜色
   ============================================= */
::selection { background: rgba(192,57,43,0.3); color: var(--text-primary); }