/*
   国产主播 - 主样式文件
   Brand: 国产主播 | Domain: soce7x.cn
   ============================================= */

/* ---- CSS变量 ---- */
:root {
  --primary: #8b2fc9;
  --primary-light: #b44fe8;
  --secondary: #e91e8c;
  --accent: #00d4ff;
  --accent2: #ff6b35;
  --dark: #0d0d1a;
  --dark2: #12122a;
  --dark3: #1a1a35;
  --card-bg: #16163a;
  --text-main: #f0f0ff;
  --text-muted: #9898c8;
  --border: rgba(139,47,201,0.3);
  --gradient-main: linear-gradient(135deg, #8b2fc9 0%, #e91e8c 100%);
  --gradient-dark: linear-gradient(180deg, #0d0d1a 0%, #12122a 100%);
  --shadow-glow: 0 0 20px rgba(139,47,201,0.4);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
}

/* ---- 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', 'Noto Sans SC', sans-serif;
  background: var(--dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--secondary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* =============================================
   顶部公告条
   ============================================= */
.top-bar {
  background: var(--gradient-main);
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.top-bar a { color: #fff; }
.top-bar a:hover { text-decoration: underline; }

/* =============================================
   导航栏
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,26,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 68px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  text-decoration: none;
}
.site-logo img.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}
.site-logo img.logo-img {
  height: 36px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  flex-shrink: 0;
}
.site-logo .logo-text {
  font-size: 18px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
/* 导航 */
.main-nav {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
}
.main-nav::-webkit-scrollbar { display: none; }
.main-nav > a,
.nav-dropdown > a {
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition);
  display: block;
}
.main-nav > a:hover,
.main-nav > a.active,
.nav-dropdown:hover > a {
  background: rgba(139,47,201,0.2);
  color: var(--primary-light);
}
/* 下拉菜单 */
.nav-dropdown {
  position: relative;
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 160px;
  background: rgba(18,18,42,0.98);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 0;
  z-index: 2000;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: 9px 18px;
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-dropdown-menu a:hover {
  color: var(--primary-light);
  background: rgba(139,47,201,0.12);
}
/* 搜索框 */
.search-wrap { position: relative; flex-shrink: 0; }
.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 6px 14px;
  gap: 8px;
  width: 220px;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary);
  background: rgba(139,47,201,0.1);
}
.header-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 13px;
  width: 100%;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 15px;
  padding: 0;
  transition: var(--transition);
  flex-shrink: 0;
}
.header-search button:hover { color: var(--primary-light); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-main);
  font-size: 24px;
  padding: 4px;
  flex-shrink: 0;
}
#search-tip {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--dark2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-muted);
  z-index: 100;
  box-shadow: var(--shadow-card);
}

/* =============================================
   面包屑
   ============================================= */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb span { color: var(--text-main); }

/* =============================================
   Hero Banner
   ============================================= */
.hero-banner {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-banner .hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}
.hero-banner .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,13,26,0.93) 0%, rgba(13,13,26,0.65) 55%, rgba(13,13,26,0.25) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 20px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(139,47,201,0.25);
  border: 1px solid var(--primary);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 12px;
  color: var(--primary-light);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero-badge::before { content: '●'; font-size: 8px; animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero-title .brand { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc {
  font-size: clamp(14px, 2vw, 17px);
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2rem; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-stat .label { font-size: 12px; color: var(--text-muted); }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(139,47,201,0.5);
  text-decoration: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(139,47,201,0.7); color: #fff; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-main);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.3);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.btn-outline:hover { border-color: var(--primary-light); color: var(--primary-light); transform: translateY(-2px); }

/* =============================================
   通用区块
   ============================================= */
.section {
  padding: 70px 20px;
  max-width: 1280px;
  margin: 0 auto;
}
.section-full {
  padding: 70px 0;
  background: var(--dark2);
}
.section-full .section-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}
.section-header {
  text-align: center;
  margin-bottom: 50px;
}
.section-tag {
  display: inline-block;
  background: rgba(139,47,201,0.15);
  border: 1px solid var(--primary);
  color: var(--primary-light);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 12px;
}
.section-title .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 600px;
  margin: 0 auto;
}

/* =============================================
   视频卡片（H5 video预览 + 悬停播放按钮）
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: var(--primary);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--dark3);
}
/* 封面图 */
.video-thumb > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease, opacity 0.3s ease;
  z-index: 1;
}
.video-card:hover .video-thumb > img { transform: scale(1.05); }
/* H5 video预览元素（鼠标悬停时显示） */
.video-preview {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  background: var(--dark3);
}
.video-card:hover .video-preview { opacity: 1; }
/* 播放按钮覆盖层 */
.video-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);
  z-index: 3;
  text-decoration: none;
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  box-shadow: 0 4px 24px rgba(139,47,201,0.7);
  transform: scale(0.8);
  transition: transform 0.3s ease;
}
.video-card:hover .play-icon { transform: scale(1); }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.82);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  z-index: 4;
  font-weight: 600;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 600;
  z-index: 4;
}
.video-info { padding: 14px 16px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-desc-text {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.video-meta span { display: flex; align-items: center; gap: 3px; }
.video-date { margin-left: auto; font-size: 11px; }

/* =============================================
   功能模块卡片
   ============================================= */
.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.module-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.module-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.module-card:hover::before { transform: scaleX(1); }
.module-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--primary);
}
.module-icon {
  width: 60px;
  height: 60px;
  background: rgba(139,47,201,0.15);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
  transition: var(--transition);
}
.module-card:hover .module-icon { background: rgba(139,47,201,0.3); transform: scale(1.1); }
.module-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.module-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* =============================================
   专家团队
   ============================================= */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: var(--primary);
}
.expert-photo {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.expert-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.expert-card:hover .expert-photo img { transform: scale(1.05); }
.expert-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 600;
}
.expert-info { padding: 20px; }
.expert-name { font-size: 18px; font-weight: 800; margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--primary-light); margin-bottom: 10px; }
.expert-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.expert-stats { display: flex; gap: 16px; margin-bottom: 14px; }
.expert-stat { text-align: center; }
.expert-stat .num { font-size: 16px; font-weight: 800; color: var(--primary-light); }
.expert-stat .label { font-size: 11px; color: var(--text-muted); }
.expert-btns { display: flex; gap: 10px; }
.btn-sm {
  flex: 1;
  text-align: center;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
}
.btn-sm.primary { background: var(--gradient-main); color: #fff; }
.btn-sm.outline { border: 1px solid var(--border); color: var(--text-muted); }
.btn-sm:hover { opacity: 0.85; transform: translateY(-1px); }

/* =============================================
   用户评价
   ============================================= */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 12px;
  right: 20px;
  font-size: 60px;
  color: rgba(139,47,201,0.15);
  font-family: Georgia, serif;
  line-height: 1;
}
.review-card:hover { border-color: var(--primary); box-shadow: var(--shadow-card); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: 14px; font-weight: 700; }
.review-stars { color: #ffd700; font-size: 13px; margin-top: 2px; }
.review-game {
  display: inline-block;
  background: rgba(139,47,201,0.15);
  color: var(--primary-light);
  font-size: 11px;
  padding: 1px 8px;
  border-radius: 10px;
  margin-left: 6px;
  font-weight: 600;
}
.review-text { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin-bottom: 12px; }
.review-date { font-size: 11px; color: var(--text-muted); }

/* =============================================
   FAQ
   ============================================= */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary); }
.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-main);
  padding: 18px 20px;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
  font-family: inherit;
}
.faq-question:hover { color: var(--primary-light); }
.faq-question::after {
  content: '▼';
  font-size: 11px;
  color: var(--primary-light);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-question::after { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer p {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* =============================================
   合作品牌Logo墙
   ============================================= */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
  min-width: 110px;
  text-align: center;
}
.partner-item:hover { border-color: var(--primary); color: var(--primary-light); transform: translateY(-2px); }

/* =============================================
   联系/二维码区域
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
}
.contact-card:hover { border-color: var(--primary); box-shadow: var(--shadow-glow); }
.contact-icon {
  width: 56px;
  height: 56px;
  background: rgba(139,47,201,0.15);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 14px;
}
.contact-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.contact-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }

/* =============================================
   How-To 指南
   ============================================= */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.howto-step {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  position: relative;
  transition: var(--transition);
}
.howto-step:hover { border-color: var(--primary); transform: translateY(-4px); }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--gradient-main);
  border-radius: 50%;
  font-size: 16px;
  font-weight: 900;
  color: #fff;
  margin-bottom: 14px;
}
.howto-step h4 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.howto-step p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* =============================================
   AI赋能区域
   ============================================= */
.ai-section {
  background: linear-gradient(135deg, rgba(139,47,201,0.1) 0%, rgba(0,212,255,0.05) 100%);
  border: 1px solid rgba(139,47,201,0.2);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.ai-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(139,47,201,0.05) 0%, transparent 60%);
  animation: rotate 20s linear infinite;
  pointer-events: none;
}
@keyframes rotate { from{transform:rotate(0deg)} to{transform:rotate(360deg)} }
.ai-features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 40px;
}
.ai-feature {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(139,47,201,0.2);
  border-radius: var(--radius);
  padding: 22px;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}
.ai-feature:hover { border-color: var(--primary); background: rgba(139,47,201,0.1); color: inherit; }
.ai-feature .icon { font-size: 32px; margin-bottom: 10px; }
.ai-feature h4 { font-size: 14px; font-weight: 700; margin-bottom: 6px; }
.ai-feature p { font-size: 12px; color: var(--text-muted); }

/* =============================================
   内页 Hero
   ============================================= */
.inner-hero {
  background: linear-gradient(135deg, var(--dark2) 0%, var(--dark3) 100%);
  padding: 50px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.inner-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 900; margin-bottom: 12px; }
.inner-hero p { font-size: 15px; color: var(--text-muted); max-width: 640px; margin: 0 auto; }

/* =============================================
   分页
   ============================================= */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
}

/* =============================================
   社交分享
   ============================================= */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  color: #fff;
}
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.share-wechat { background: #07c160; }
.share-weibo { background: #e6162d; }
.share-douyin { background: #010101; border: 1px solid #444; }
.share-bilibili { background: #00a1d6; }

/* =============================================
   页脚
   ============================================= */
.site-footer {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  padding: 50px 20px 24px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.footer-qr-row { display: flex; gap: 16px; }
.footer-qr-item { text-align: center; }
.footer-qr-item img { width: 80px; height: 80px; border-radius: 8px; margin-bottom: 6px; }
.footer-qr-item span { font-size: 11px; color: var(--text-muted); display: block; }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; color: var(--text-main); }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 13px; color: var(--text-muted); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary-light); }

/* =============================================
   标签云
   ============================================= */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  background: rgba(139,47,201,0.12);
  border: 1px solid rgba(139,47,201,0.25);
  color: var(--primary-light);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.tag:hover { background: rgba(139,47,201,0.25); border-color: var(--primary); color: var(--primary-light); }

/* =============================================
   动画
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   响应式 - 平板（≤1024px）
   ============================================= */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .header-search { width: 180px; }
}

/* =============================================
   响应式 - 手机（≤768px）
   ============================================= */
@media (max-width: 768px) {
  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(13,13,26,0.99);
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    z-index: 999;
    max-height: 80vh;
    overflow-y: auto;
  }
  .main-nav.open { display: flex; }
  .main-nav > a,
  .nav-dropdown > a { padding: 12px 20px; border-radius: 0; font-size: 15px; }
  .nav-dropdown-menu {
    display: none !important;
    position: static;
    box-shadow: none;
    border: none;
    background: rgba(139,47,201,0.08);
    border-radius: 0;
    padding: 0;
  }
  .nav-dropdown.open .nav-dropdown-menu { display: block !important; }
  .nav-dropdown-menu a { padding: 10px 32px; font-size: 14px; }
  .nav-toggle { display: block; }
  .header-search { display: none; }
  .hero-banner { min-height: 420px; }
  .hero-stats { gap: 20px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .experts-grid { grid-template-columns: 1fr; }
  .ai-section { padding: 30px 20px; }
  .section { padding: 50px 16px; }
  .section-full { padding: 50px 0; }
}

/* =============================================
   响应式 - 小屏（≤480px）
   ============================================= */
@media (max-width: 480px) {
  .hero-title { font-size: 1.8rem; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .module-grid { grid-template-columns: 1fr 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 16px; }
  .hero-stat .num { font-size: 1.5rem; }
  .site-logo .logo-text { display: none; }
}