/* ============================================
   探花视频 - 主样式文件
   品牌色：深海蓝 #0A1628 | 珊瑚橙 #FF6B47 | 浅蓝 #1E4D8C
   ============================================ */

/* === 基础重置 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: #f5f7fa;
  color: #2c3e50;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .25s; }
a:hover { color: #FF6B47; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; background: none; }

/* === CSS变量 === */
:root {
  --primary: #0A1628;
  --secondary: #1E4D8C;
  --accent: #FF6B47;
  --accent2: #FFB347;
  --light-blue: #4A90D9;
  --bg-light: #f5f7fa;
  --bg-white: #ffffff;
  --text-dark: #1a2332;
  --text-mid: #4a5568;
  --text-light: #718096;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(10,22,40,.08);
  --shadow-md: 0 4px 20px rgba(10,22,40,.12);
  --shadow-lg: 0 8px 40px rgba(10,22,40,.18);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: .3s ease;
}

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

/* === 顶部公告栏 === */
.top-bar {
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  color: rgba(255,255,255,.85);
  font-size: .8rem;
  padding: 6px 0;
  text-align: center;
  letter-spacing: .5px;
}
.top-bar a { color: var(--accent2); }

/* === 头部导航 === */
.site-header {
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 3px solid var(--accent);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img.logo-img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: contain;
}
.site-logo .logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.site-logo .logo-text span { color: var(--accent); }

/* === 主导航 === */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-weight: 500;
  color: var(--text-dark);
  white-space: nowrap;
  transition: all var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  background: var(--accent);
  color: #fff;
}

/* === 搜索框 === */
.search-bar {
  display: flex;
  align-items: center;
  background: #f0f4f8;
  border: 2px solid transparent;
  border-radius: 24px;
  padding: 6px 16px;
  gap: 8px;
  transition: all var(--transition);
  min-width: 200px;
}
.search-bar:focus-within {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(255,107,71,.1);
}
.search-bar input {
  border: none;
  background: transparent;
  font-size: .9rem;
  color: var(--text-dark);
  width: 100%;
  outline: none;
}
.search-bar input::placeholder { color: var(--text-light); }
.search-bar button {
  color: var(--text-light);
  font-size: 1rem;
  padding: 0;
  transition: color var(--transition);
}
.search-bar button:hover { color: var(--accent); }

/* === 汉堡菜单 === */
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span {
  width: 24px; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* === 英雄区 === */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--primary);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner_hero.jpg');
  background-size: cover;
  background-position: center;
  opacity: .45;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,.85) 0%, rgba(30,77,140,.6) 60%, transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
  color: #fff;
}
.hero-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,.4);
}
.hero-content h1 em { color: var(--accent2); font-style: normal; }
.hero-content p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.85);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 700;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(255,107,71,.4);
}
.btn-primary:hover {
  background: #e85a35;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(255,107,71,.5);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,.6);
  transition: all var(--transition);
}
.btn-outline:hover {
  background: rgba(255,255,255,.15);
  border-color: #fff;
  color: #fff;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat .num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent2);
}
.hero-stat .label {
  font-size: .85rem;
  color: rgba(255,255,255,.7);
  margin-top: 2px;
}

/* === 通用区块 === */
.section { padding: 72px 0; }
.section-alt { background: #eef2f7; }
.section-dark { background: var(--primary); color: #fff; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .tag {
  display: inline-block;
  background: rgba(255,107,71,.1);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.section-dark .section-header h2 { color: #fff; }
.section-header p {
  color: var(--text-mid);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}
.section-dark .section-header p { color: rgba(255,255,255,.7); }

/* === 视频卡片 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0a1628;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.3);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 60px;
  height: 60px;
  background: rgba(255,107,71,.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(.8);
  transition: transform var(--transition);
  box-shadow: 0 4px 20px rgba(255,107,71,.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,.75);
  color: #fff;
  font-size: .75rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--accent);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}
.video-info { padding: 16px; }
.video-info h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: .8rem;
  color: var(--text-light);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  flex-shrink: 0;
}
.author-name { font-size: .82rem; color: var(--text-mid); font-weight: 500; }

/* === 特色模块卡片 === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255,107,71,.1), rgba(255,179,71,.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: .88rem;
  color: var(--text-mid);
  line-height: 1.7;
}

/* === 专家展示 === */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 28px;
}
.expert-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  text-align: center;
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.expert-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: top;
}
.expert-info { padding: 20px; }
.expert-info h3 { font-size: 1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.expert-title {
  font-size: .82rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
}
.expert-desc { font-size: .83rem; color: var(--text-mid); line-height: 1.6; margin-bottom: 14px; }
.expert-tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 14px; }
.expert-tag {
  background: #f0f4f8;
  color: var(--text-mid);
  font-size: .72rem;
  padding: 3px 10px;
  border-radius: 12px;
}
.expert-actions { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-sm-primary { background: var(--accent); color: #fff; }
.btn-sm-primary:hover { background: #e85a35; color: #fff; }
.btn-sm-outline { border: 1.5px solid var(--border); color: var(--text-mid); }
.btn-sm-outline:hover { border-color: var(--accent); color: var(--accent); }

/* === 图片展示区 === */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.gallery-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 3/4;
  position: relative;
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,22,40,.7) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay span { color: #fff; font-size: .85rem; font-weight: 600; }

/* === 用户评价 === */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 4rem;
  color: rgba(255,107,71,.12);
  font-family: Georgia, serif;
  line-height: 1;
}
.review-stars { color: #FFB347; font-size: 1rem; margin-bottom: 12px; letter-spacing: 2px; }
.review-text { font-size: .9rem; color: var(--text-mid); line-height: 1.8; margin-bottom: 16px; }
.reviewer {
  display: flex;
  align-items: center;
  gap: 12px;
}
.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--secondary), var(--light-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  flex-shrink: 0;
}
.reviewer-name { font-size: .9rem; font-weight: 700; color: var(--text-dark); }
.reviewer-role { font-size: .78rem; color: var(--text-light); }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: .95rem;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}
.faq-question:hover { background: #f8fafc; }
.faq-question.open { color: var(--accent); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #f0f4f8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  flex-shrink: 0;
  transition: all var(--transition);
}
.faq-question.open .faq-icon {
  background: var(--accent);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  font-size: .9rem;
  color: var(--text-mid);
  line-height: 1.8;
}
.faq-answer.open { max-height: 300px; padding: 0 24px 18px; }

/* === 合作品牌 === */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 28px;
  font-weight: 700;
  font-size: .9rem;
  color: var(--text-mid);
  transition: all var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-item:hover { border-color: var(--accent); color: var(--accent); box-shadow: var(--shadow-sm); }

/* === 联系区 === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 { font-size: 1.3rem; font-weight: 800; color: var(--text-dark); margin-bottom: 20px; }
.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
  align-items: flex-start;
}
.contact-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-text .label { font-size: .78rem; color: var(--text-light); margin-bottom: 2px; }
.contact-text .value { font-size: .92rem; font-weight: 600; color: var(--text-dark); }
.qr-codes { display: flex; gap: 24px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: 8px; border: 1px solid var(--border); }
.qr-item p { font-size: .78rem; color: var(--text-light); margin-top: 6px; }

/* === 社交分享 === */
.share-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 24px;
  font-size: .85rem;
  font-weight: 600;
  transition: all var(--transition);
  border: 2px solid transparent;
}
.share-wechat { background: #07C160; color: #fff; }
.share-weibo { background: #E6162D; color: #fff; }
.share-douyin { background: #000; color: #fff; }
.share-bilibili { background: #00A1D6; color: #fff; }
.share-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); opacity: .9; color: #fff; }

/* === 页脚 === */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand .logo-text span { color: var(--accent); }
.footer-brand p { font-size: .88rem; line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.social-icon {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  transition: all var(--transition);
  color: rgba(255,255,255,.7);
}
.social-icon:hover { background: var(--accent); color: #fff; }
.footer-col h4 { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: .85rem;
  color: rgba(255,255,255,.6);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .82rem;
  color: rgba(255,255,255,.5);
}
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--accent); }

/* === 面包屑 === */
.breadcrumb {
  background: #f0f4f8;
  padding: 12px 0;
  font-size: .85rem;
  color: var(--text-light);
}
.breadcrumb-inner { display: flex; align-items: center; gap: 8px; }
.breadcrumb a { color: var(--secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-light); }
.breadcrumb .current { color: var(--text-dark); font-weight: 600; }

/* === 内页横幅 === */
.page-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  padding: 60px 0;
  color: #fff;
  text-align: center;
}
.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 12px;
}
.page-banner p { font-size: 1rem; color: rgba(255,255,255,.8); max-width: 560px; margin: 0 auto; }

/* === 标签 === */
.tag-list { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  background: #f0f4f8;
  color: var(--text-mid);
  font-size: .78rem;
  padding: 4px 12px;
  border-radius: 16px;
  transition: all var(--transition);
}
.tag:hover, .tag.active { background: var(--accent); color: #fff; }

/* === 加载更多 === */
.load-more-wrap { text-align: center; margin-top: 40px; }
.btn-load-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 30px;
  border: 2px solid var(--accent);
  color: var(--accent);
  font-size: .95rem;
  font-weight: 700;
  transition: all var(--transition);
}
.btn-load-more:hover { background: var(--accent); color: #fff; }

/* === 统计数字 === */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  text-align: center;
  padding: 32px 20px;
  background: rgba(255,255,255,.05);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.1);
}
.stat-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--accent2);
  display: block;
  margin-bottom: 6px;
}
.stat-label { font-size: .85rem; color: rgba(255,255,255,.65); }

/* === 弹幕效果 === */
.danmaku-bar {
  background: rgba(0,0,0,.85);
  padding: 12px 0;
  overflow: hidden;
  position: relative;
}
.danmaku-inner {
  display: flex;
  gap: 40px;
  animation: danmaku-scroll 30s linear infinite;
  white-space: nowrap;
}
.danmaku-inner span { color: rgba(255,255,255,.8); font-size: .88rem; }
@keyframes danmaku-scroll {
  0% { transform: translateX(100vw); }
  100% { transform: translateX(-100%); }
}

/* === 分类标签导航 === */
.cat-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.cat-btn {
  padding: 8px 20px;
  border-radius: 24px;
  font-size: .88rem;
  font-weight: 600;
  border: 2px solid var(--border);
  color: var(--text-mid);
  transition: all var(--transition);
  cursor: pointer;
}
.cat-btn:hover, .cat-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* === 内页文章内容 === */
.page-intro {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 40px;
  border-left: 4px solid var(--accent);
}
.page-intro p { font-size: .95rem; color: var(--text-mid); line-height: 1.9; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .header-inner { flex-wrap: wrap; gap: 12px; }
  .main-nav { display: none; flex-direction: column; width: 100%; background: #fff; padding: 12px 0; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 16px; border-radius: 0; }
  .hamburger { display: flex; }
  .search-bar { min-width: 160px; }
  .hero-content { padding: 40px 20px; }
  .hero-stats { gap: 24px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 48px 0; }
}
@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .video-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
}

/* === 懒加载占位 === */
img[data-src] { background: linear-gradient(90deg, #f0f4f8 25%, #e2e8f0 50%, #f0f4f8 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* === 滚动条美化 === */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #f0f4f8; }
::-webkit-scrollbar-thumb { background: var(--secondary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* === 选中文字颜色 === */
::selection { background: rgba(255,107,71,.2); color: var(--text-dark); }