/* =====================================================
   抖阴 - 植物视频社区 | 主样式文件
   域名: eyuqzven.cn
   原创设计：深绿+自然棕+清新白配色方案
   ===================================================== */

/* CSS变量 */
:root {
  --primary: #1a7a3c;
  --primary-dark: #0f5a2a;
  --primary-light: #2ecc71;
  --accent: #f39c12;
  --accent-dark: #d68910;
  --bg-dark: #0d1f0f;
  --bg-mid: #142b17;
  --bg-card: #1c3620;
  --bg-light: #f8fdf9;
  --text-white: #ffffff;
  --text-light: #e8f5e9;
  --text-muted: #a5c9a8;
  --text-dark: #1a2e1c;
  --border-color: #2d5a32;
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 30px rgba(26,122,60,0.4);
  --radius: 12px;
  --radius-sm: 6px;
  --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', '微软雅黑', sans-serif;
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

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

/* ===== 干扰标签隐藏（不影响布局）===== */
.dy-noise, .dy-hidden-tag, .dy-bg-tag {
  display: none !important;
  visibility: hidden !important;
  position: absolute !important;
  left: -9999px !important;
  width: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
}

/* ===== 顶部公告栏 ===== */
.top-notice {
  background: linear-gradient(90deg, var(--primary-dark), var(--primary), var(--primary-dark));
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  color: var(--text-light);
  letter-spacing: 1px;
}
.top-notice a { color: var(--accent); font-weight: 600; }

/* ===== 导航栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 31, 15, 0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  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;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-light);
}
.site-logo .logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 1px;
}
.site-logo .logo-text span { color: var(--primary-light); }

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--text-light);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  background: var(--primary);
  color: var(--text-white);
}
.main-nav .nav-hot {
  position: relative;
}
.main-nav .nav-hot::after {
  content: 'HOT';
  position: absolute;
  top: -4px;
  right: -2px;
  background: #e74c3c;
  color: white;
  font-size: 9px;
  padding: 1px 4px;
  border-radius: 4px;
  font-weight: 700;
}

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-mid);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
  flex: 0 0 220px;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(46,204,113,0.15);
}
.header-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-light);
  padding: 8px 14px;
  font-size: 13px;
  width: 100%;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search button {
  background: var(--primary);
  color: white;
  padding: 8px 14px;
  font-size: 14px;
  transition: var(--transition);
  flex-shrink: 0;
}
.header-search button:hover { background: var(--primary-dark); }

/* 汉堡菜单 */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  padding: 4px;
}
.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== 搜索框区域（导航下方）===== */
.search-bar-section {
  background: var(--bg-mid);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 20px;
}
.search-bar-inner {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 30px;
  overflow: hidden;
  transition: var(--transition);
}
.search-bar-inner:focus-within {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(46,204,113,0.1);
}
.search-bar-inner input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-light);
  padding: 12px 20px;
  font-size: 15px;
}
.search-bar-inner input::placeholder { color: var(--text-muted); }
.search-bar-inner .search-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 0 28px 28px 0;
  transition: var(--transition);
}
.search-bar-inner .search-btn:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}
.search-hot-tags {
  text-align: center;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
}
.search-hot-tags a {
  color: var(--text-muted);
  margin: 0 6px;
  transition: var(--transition);
}
.search-hot-tags a:hover { color: var(--primary-light); }

/* ===== Hero Banner ===== */
.hero-banner {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner-home.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero-banner:hover .hero-bg { transform: scale(1.0); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,31,15,0.85) 0%, rgba(26,122,60,0.3) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-text .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(46,204,113,0.2);
  border: 1px solid var(--primary-light);
  color: var(--primary-light);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero-text h1 {
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero-text h1 .brand { color: var(--primary-light); }
.hero-text .hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(46,204,113,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(46,204,113,0.5);
  color: white;
}
.btn-outline {
  background: transparent;
  color: var(--text-white);
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.4);
  transition: var(--transition);
}
.btn-outline:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}
.hero-stat-item { text-align: center; }
.hero-stat-item .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-light);
  display: block;
}
.hero-stat-item .label {
  font-size: 12px;
  color: var(--text-muted);
}
.hero-video-preview {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  border: 2px solid var(--border-color);
}
.hero-video-preview img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.hero-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  background: rgba(46,204,113,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 0 8px rgba(46,204,113,0.2);
}
.hero-play-btn:hover {
  background: var(--primary-light);
  transform: translate(-50%, -50%) scale(1.1);
}

/* ===== 通用Section样式 ===== */
.section { padding: 80px 20px; }
.section-alt { background: var(--bg-mid); }
.container { max-width: 1280px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block;
  background: rgba(46,204,113,0.15);
  color: var(--primary-light);
  border: 1px solid rgba(46,204,113,0.3);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}
.section-header h2 .brand { color: var(--primary-light); }
.section-header p {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}
.section-more {
  text-align: center;
  margin-top: 40px;
}
.btn-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--primary-light);
  border: 1px solid var(--primary-light);
  padding: 10px 28px;
  border-radius: 24px;
  font-size: 14px;
  transition: var(--transition);
}
.btn-more:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ===== 视频卡片网格 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.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); }
.video-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.video-card:hover .video-play-overlay { background: rgba(0,0,0,0.45); }
.video-play-btn {
  width: 52px;
  height: 52px;
  background: rgba(46,204,113,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: white;
  opacity: 0;
  transform: scale(0.7);
  transition: var(--transition);
  box-shadow: 0 0 0 6px rgba(46,204,113,0.2);
}
.video-card:hover .video-play-btn {
  opacity: 1;
  transform: scale(1);
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: white;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: white;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-badge.hot { background: #e74c3c; }
.video-badge.new { background: #3498db; }
.video-info { padding: 14px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats { display: flex; gap: 10px; }
.video-stats span { display: flex; align-items: center; gap: 3px; }
.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.video-tag {
  background: rgba(46,204,113,0.1);
  color: var(--primary-light);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid rgba(46,204,113,0.2);
}

/* ===== 功能模块卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(26,122,60,0.3);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== 专家展示 ===== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: center;
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.expert-avatar {
  position: relative;
  padding: 24px 24px 0;
}
.expert-avatar img {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto;
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(46,204,113,0.15);
}
.expert-badge {
  position: absolute;
  bottom: 4px;
  right: calc(50% - 55px);
  background: var(--accent);
  color: white;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}
.expert-info { padding: 16px 20px 24px; }
.expert-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 4px;
}
.expert-title {
  font-size: 12px;
  color: var(--primary-light);
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.expert-awards {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 16px;
}
.award-tag {
  background: rgba(243,156,18,0.15);
  color: var(--accent);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid rgba(243,156,18,0.3);
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-expert {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-expert-primary {
  background: var(--primary);
  color: white;
}
.btn-expert-primary:hover { background: var(--primary-dark); color: white; }
.btn-expert-outline {
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}
.btn-expert-outline:hover { border-color: var(--primary-light); color: var(--primary-light); }

/* ===== 社区功能 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.community-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.community-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.community-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.community-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.community-card:hover .community-img img { transform: scale(1.05); }
.community-body { padding: 20px; }
.community-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}
.community-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}
.community-stats {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}
.community-stats span { display: flex; align-items: center; gap: 4px; }

/* ===== AI赋能 ===== */
.ai-section {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 100%);
  position: relative;
  overflow: hidden;
}
.ai-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(46,204,113,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.ai-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.ai-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  border: 2px solid var(--border-color);
}
.ai-image img { width: 100%; }
.ai-features { display: flex; flex-direction: column; gap: 20px; }
.ai-feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.ai-feature-item:hover {
  border-color: var(--primary);
  transform: translateX(4px);
}
.ai-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.ai-feature-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}
.ai-feature-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== 合作品牌 ===== */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.partner-item:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
  transform: translateY(-2px);
}
.partner-item .partner-icon { font-size: 20px; }

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
}
.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.contact-item:hover { border-color: var(--primary); }
.contact-item-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.contact-item-text strong {
  display: block;
  font-size: 14px;
  color: var(--text-white);
  margin-bottom: 4px;
}
.contact-item-text span {
  font-size: 13px;
  color: var(--text-muted);
}
.qr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.qr-item {
  text-align: center;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border-color);
}
.qr-item img {
  width: 120px;
  height: 120px;
  margin: 0 auto 10px;
  border-radius: var(--radius-sm);
}
.qr-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
}

/* ===== 用户评价 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 12px;
  right: 20px;
  font-size: 60px;
  color: rgba(46,204,113,0.1);
  font-family: Georgia, serif;
  line-height: 1;
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}
.review-user-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-white);
}
.review-date {
  font-size: 11px;
  color: var(--text-muted);
}
.review-stars {
  color: var(--accent);
  font-size: 13px;
  margin-bottom: 10px;
}
.review-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}
.review-platform {
  margin-top: 12px;
  font-size: 11px;
  color: var(--primary-light);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== FAQ ===== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary); }
.faq-question {
  width: 100%;
  background: transparent;
  color: var(--text-white);
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary-light); }
.faq-question.active { color: var(--primary-light); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-question.active .faq-icon {
  background: var(--primary);
  border-color: var(--primary);
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-answer.open { max-height: 300px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

/* ===== 社交分享 ===== */
.share-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid transparent;
}
.share-wechat { background: #07c160; color: white; }
.share-weibo { background: #e6162d; color: white; }
.share-douyin { background: #010101; color: white; border-color: #69c9d0; }
.share-bilibili { background: #00a1d6; color: white; }
.share-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.3); color: white; }

/* ===== 统计数字 ===== */
.stats-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--bg-mid));
  padding: 60px 20px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}
.stat-item .stat-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary-light);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-item .stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== SEO文章区 ===== */
.seo-article {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--border-color);
  margin-top: 40px;
}
.seo-article h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}
.seo-article h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-light);
  margin: 20px 0 10px;
}
.seo-article p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 12px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 14px 0;
  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 .separator { color: var(--border-color); }
.breadcrumb .current { color: var(--primary-light); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-color);
  padding: 60px 20px 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto 40px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .footer-logo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}
.footer-brand .footer-logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-social { display: flex; gap: 10px; }
.social-btn {
  width: 36px;
  height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-muted);
  transition: var(--transition);
}
.social-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary-light); }
.footer-update {
  color: var(--primary-light);
  font-size: 12px;
}

/* ===== 视频模态框 ===== */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.9);
  align-items: center;
  justify-content: center;
}
.video-modal.active { display: flex; }
.video-modal-inner {
  position: relative;
  width: 90%;
  max-width: 900px;
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--border-color);
  animation: modalIn 0.3s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  width: 36px;
  height: 36px;
  background: rgba(0,0,0,0.6);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}
.modal-close:hover { background: #e74c3c; }
.modal-video-area {
  aspect-ratio: 16/9;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  color: var(--text-muted);
  font-size: 15px;
}
.modal-play-icon {
  width: 80px;
  height: 80px;
  background: rgba(46,204,113,0.2);
  border: 2px solid var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--primary-light);
}
.modal-video-info {
  padding: 20px 24px;
}
.modal-video-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}
.modal-video-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}

/* ===== 内页样式 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 100%);
  padding: 60px 20px;
  border-bottom: 1px solid var(--border-color);
}
.page-hero h1 {
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 600px;
}
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.filter-btn {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-video-preview { max-width: 500px; }
  .ai-layout { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-toggle { display: flex; }
  .header-search { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
  }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .community-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .qr-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 20px; }
  .section { padding: 50px 16px; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-btns { flex-direction: column; }
  .share-bar { gap: 8px; }
  .share-btn { padding: 8px 14px; font-size: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
  .qr-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; justify-content: center; }
}

/* ===== 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);
}
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ===== 加载动画 ===== */
.loading-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--accent));
  z-index: 9999;
  transition: width 0.3s ease;
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 500;
  box-shadow: 0 4px 12px rgba(26,122,60,0.4);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ===== 标签页/分类 ===== */
.tab-nav {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 30px;
  overflow-x: auto;
}
.tab-btn {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.tab-btn:hover, .tab-btn.active {
  color: var(--primary-light);
  border-bottom-color: var(--primary-light);
}

/* ===== 通知提示 ===== */
.toast {
  position: fixed;
  bottom: 80px;
  right: 30px;
  background: var(--bg-card);
  border: 1px solid var(--primary);
  color: var(--text-light);
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  z-index: 9998;
  opacity: 0;
  transform: translateX(20px);
  transition: var(--transition);
  max-width: 280px;
}
.toast.show {
  opacity: 1;
  transform: translateX(0);
}