/* =============================================
   草莓视频 - 主样式文件
   Brand: 草莓视频 | Domain: wcytclud.cn
   原创设计 © 2025 草莓视频
   ============================================= */

/* --- CSS变量 --- */
:root {
  --brand-primary: #E91E8C;
  --brand-secondary: #FF5252;
  --brand-accent: #9C27B0;
  --brand-dark: #1A0A2E;
  --brand-darker: #0D0518;
  --brand-light: #FFF0F7;
  --brand-gradient: linear-gradient(135deg, #E91E8C 0%, #FF5252 50%, #FF9800 100%);
  --brand-gradient2: linear-gradient(135deg, #9C27B0 0%, #E91E8C 100%);
  --text-primary: #1A0A2E;
  --text-secondary: #5A4A6A;
  --text-muted: #9E8FAE;
  --text-white: #FFFFFF;
  --bg-white: #FFFFFF;
  --bg-light: #FBF5FF;
  --bg-card: #FFFFFF;
  --border-light: #F0E6F8;
  --shadow-sm: 0 2px 8px rgba(233,30,140,0.08);
  --shadow-md: 0 4px 20px rgba(233,30,140,0.15);
  --shadow-lg: 0 8px 40px rgba(233,30,140,0.2);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 重置与基础 --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans CJK SC', sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* --- 通用工具类 --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-pad { padding: 80px 0; }
.section-pad-sm { padding: 50px 0; }
.text-center { text-align: center; }
.text-gradient {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px;
  font-size: 15px; font-weight: 600;
  transition: var(--transition); cursor: pointer;
}
.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(233,30,140,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(233,30,140,0.45); }
.btn-outline {
  border: 2px solid var(--brand-primary);
  color: var(--brand-primary);
  background: transparent;
}
.btn-outline:hover { background: var(--brand-primary); color: #fff; }
.btn-white {
  background: #fff; color: var(--brand-primary);
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,0,0,0.15); }
.tag {
  display: inline-block; padding: 3px 12px;
  background: var(--brand-light); color: var(--brand-primary);
  border-radius: 50px; font-size: 12px; font-weight: 600;
}
.badge {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 2px 8px; border-radius: 50px;
  font-size: 11px; font-weight: 700;
  background: var(--brand-gradient); color: #fff;
}

/* =============================================
   顶部公告栏
   ============================================= */
.top-bar {
  background: var(--brand-gradient);
  color: #fff; text-align: center;
  padding: 8px 20px; font-size: 13px;
}
.top-bar a { color: #fff; text-decoration: underline; }

/* =============================================
   导航栏
   ============================================= */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 20px;
}
.site-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 800;
  color: var(--brand-primary);
  flex-shrink: 0;
}
.site-logo img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.logo-text { background: var(--brand-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  white-space: nowrap;
}
.site-nav a:hover, .site-nav a.active {
  color: var(--brand-primary);
  background: var(--brand-light);
}
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-actions .btn { padding: 8px 20px; font-size: 13px; }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--brand-primary); border-radius: 2px; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 搜索框 */
.search-bar-wrap {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border-light);
  padding: 10px 0;
}
.search-bar-inner {
  display: flex; align-items: center; gap: 10px;
  max-width: 700px; margin: 0 auto; padding: 0 20px;
}
.search-input-box {
  flex: 1; display: flex; align-items: center;
  background: #fff; border: 2px solid var(--border-light);
  border-radius: 50px; padding: 8px 18px; gap: 10px;
  transition: var(--transition);
}
.search-input-box:focus-within { border-color: var(--brand-primary); box-shadow: 0 0 0 3px rgba(233,30,140,0.1); }
.search-input-box input {
  flex: 1; border: none; outline: none;
  font-size: 14px; color: var(--text-primary);
  background: transparent;
}
.search-input-box .search-icon { color: var(--text-muted); font-size: 16px; flex-shrink: 0; }
.search-btn {
  background: var(--brand-gradient); color: #fff;
  border: none; border-radius: 50px;
  padding: 9px 22px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.search-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.search-hot-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 6px 20px; max-width: 700px; margin: 0 auto; }
.search-hot-tags span { font-size: 12px; color: var(--text-muted); white-space: nowrap; }
.search-hot-tags a { font-size: 12px; color: var(--text-secondary); padding: 2px 10px; background: #fff; border-radius: 50px; border: 1px solid var(--border-light); white-space: nowrap; }
.search-hot-tags a:hover { color: var(--brand-primary); border-color: var(--brand-primary); }

/* =============================================
   面包屑 (百度SEO结构化数据支持)
   ============================================= */
.breadcrumb {
  padding: 12px 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(--brand-primary); }
.breadcrumb .sep { color: var(--border-light); }
.breadcrumb .current { color: var(--brand-primary); font-weight: 500; }

/* =============================================
   Hero 首屏
   ============================================= */
.hero-section {
  position: relative; overflow: hidden;
  min-height: 580px;
  background: var(--brand-dark);
  display: flex; align-items: center;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.35;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(26,10,46,0.85) 0%, rgba(233,30,140,0.25) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 650px; padding: 60px 0;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(233,30,140,0.2); border: 1px solid rgba(233,30,140,0.4);
  color: #FF9EC8; border-radius: 50px;
  padding: 6px 16px; font-size: 13px; font-weight: 600;
  margin-bottom: 20px;
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: #FF5252; animation: pulse 1.5s infinite; flex-shrink: 0; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(1.3)} }
.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900; line-height: 1.2;
  color: #fff; margin-bottom: 16px;
}
.hero-title .brand { background: var(--brand-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 17px; color: rgba(255,255,255,0.8); margin-bottom: 32px; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  position: relative; z-index: 2;
  display: flex; gap: 40px; margin-top: 48px; flex-wrap: wrap;
}
.hero-stat-item { text-align: center; }
.hero-stat-num { font-size: 28px; font-weight: 800; color: #fff; line-height: 1; }
.hero-stat-num span { background: var(--brand-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-stat-label { font-size: 12px; color: rgba(255,255,255,0.6); margin-top: 4px; }

/* =============================================
   区块标题
   ============================================= */
.section-header { margin-bottom: 48px; }
.section-header.center { text-align: center; }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; color: var(--brand-primary);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-label::before, .section-label::after {
  content: ''; display: block; width: 20px; height: 2px;
  background: var(--brand-gradient); border-radius: 2px;
}
.section-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800; line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.section-desc { font-size: 16px; color: var(--text-secondary); max-width: 600px; }
.section-header.center .section-desc { margin: 0 auto; }
.section-more { font-size: 14px; color: var(--brand-primary); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
.section-more:hover { gap: 8px; }

/* =============================================
   视频卡片 (鼠标悬停显示播放按钮 - 核心需求)
   ============================================= */
.video-grid { display: grid; gap: 20px; }
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }
.video-grid-2 { grid-template-columns: repeat(2, 1fr); }
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--border-light);
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(233,30,140,0.2); }
.video-thumb {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9; background: var(--brand-dark);
}
.video-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }

/* 播放按钮 - 默认隐藏，hover显示 */
.video-play-btn {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0);
  opacity: 0;
  transition: opacity 0.3s ease, background 0.3s ease;
  pointer-events: none;
}
.video-card:hover .video-play-btn {
  opacity: 1;
  background: rgba(0,0,0,0.38);
  pointer-events: auto;
}
.play-icon {
  width: 60px; height: 60px; border-radius: 50%;
  background: rgba(233,30,140,0.92);
  display: flex; align-items: center; justify-content: center;
  transform: scale(0.75);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.3s;
  box-shadow: 0 4px 24px rgba(233,30,140,0.55);
}
.video-card:hover .play-icon { transform: scale(1); box-shadow: 0 8px 32px rgba(233,30,140,0.7); }
.play-icon svg { width: 24px; height: 24px; fill: #fff; margin-left: 4px; }

/* 视频时长标签 */
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.78); color: #fff;
  font-size: 11px; font-weight: 700;
  padding: 2px 7px; border-radius: 4px;
  letter-spacing: 0.5px;
}
.video-tag-overlay { position: absolute; top: 8px; left: 8px; }
.video-info { padding: 14px; }
.video-title {
  font-size: 14px; font-weight: 600; color: var(--text-primary);
  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; justify-content: space-between;
  font-size: 12px; color: var(--text-muted);
}
.video-author { display: flex; align-items: center; gap: 6px; }
.video-author img { width: 22px; height: 22px; border-radius: 50%; object-fit: cover; }
.video-stats { display: flex; gap: 10px; }
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* 大视频卡片 */
.video-card-lg .video-thumb { aspect-ratio: 16/9; }
.video-card-lg .video-title { font-size: 16px; }

/* =============================================
   分类导航标签
   ============================================= */
.category-tabs {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 28px; align-items: center;
}
.cat-tab {
  padding: 8px 20px; border-radius: 50px;
  font-size: 14px; font-weight: 500;
  border: 2px solid var(--border-light);
  color: var(--text-secondary);
  transition: var(--transition); cursor: pointer;
  white-space: nowrap;
}
.cat-tab:hover, .cat-tab.active {
  background: var(--brand-gradient); color: #fff; border-color: transparent;
  box-shadow: 0 4px 12px rgba(233,30,140,0.25);
}

/* =============================================
   特色内容区块
   ============================================= */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  padding: 32px 24px; border-radius: var(--radius-lg);
  background: var(--bg-card); border: 1px solid var(--border-light);
  text-align: center; transition: var(--transition);
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--brand-gradient);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(233,30,140,0.2); }
.feature-icon {
  width: 64px; height: 64px; border-radius: var(--radius-md);
  background: var(--brand-light);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px; font-size: 28px;
}
.feature-title { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* =============================================
   专家展示
   ============================================= */
.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.expert-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm);
  transition: var(--transition); text-align: center;
  border: 1px solid var(--border-light);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(233,30,140,0.2); }
.expert-avatar {
  width: 100%; aspect-ratio: 1/1; overflow: hidden;
  position: relative;
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.expert-card:hover .expert-avatar img { transform: scale(1.05); }
.expert-info { padding: 16px; }
.expert-name { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--brand-primary); font-weight: 600; margin-bottom: 8px; }
.expert-desc { font-size: 13px; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.6; }
.expert-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.expert-actions a { font-size: 12px; padding: 6px 14px; border-radius: 50px; }

/* =============================================
   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-md);
  padding: 24px; border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.review-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: rgba(233,30,140,0.2); }
.review-stars { color: #FFB300; font-size: 16px; margin-bottom: 12px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.reviewer { display: flex; align-items: center; gap: 10px; }
.reviewer-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--brand-gradient);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px; font-weight: 700; flex-shrink: 0;
}
.reviewer-name { font-size: 14px; font-weight: 600; }
.reviewer-meta { font-size: 12px; color: var(--text-muted); }

/* =============================================
   FAQ
   ============================================= */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md); margin-bottom: 12px;
  overflow: hidden; transition: var(--transition);
}
.faq-item.active { border-color: var(--brand-primary); box-shadow: var(--shadow-sm); }
.faq-question {
  padding: 18px 24px; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 15px; font-weight: 600; color: var(--text-primary);
  background: var(--bg-card); gap: 12px;
}
.faq-question:hover { color: var(--brand-primary); }
.faq-item.active .faq-question { color: var(--brand-primary); background: var(--brand-light); }
.faq-arrow { width: 20px; height: 20px; transition: transform 0.3s; flex-shrink: 0; }
.faq-item.active .faq-arrow { transform: rotate(180deg); }
.faq-answer {
  padding: 0 24px; max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  font-size: 14px; color: var(--text-secondary); line-height: 1.8;
}
.faq-item.active .faq-answer { padding: 16px 24px; max-height: 400px; }

/* =============================================
   合作品牌
   ============================================= */
.partners-strip {
  background: var(--bg-light); padding: 40px 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.partners-label { text-align: center; font-size: 13px; color: var(--text-muted); margin-bottom: 24px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; }
.partners-logos { display: flex; align-items: center; justify-content: center; gap: 40px; flex-wrap: wrap; }
.partner-logo {
  padding: 10px 20px; background: #fff; border-radius: var(--radius-sm);
  border: 1px solid var(--border-light); font-size: 14px; font-weight: 700;
  color: var(--text-muted); transition: var(--transition);
}
.partner-logo:hover { color: var(--brand-primary); border-color: var(--brand-primary); transform: translateY(-2px); }

/* =============================================
   加入社区指南
   ============================================= */
.join-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.join-step {
  text-align: center; padding: 24px 16px;
  background: var(--bg-card); border-radius: var(--radius-md);
  border: 1px solid var(--border-light); position: relative;
  transition: var(--transition);
}
.join-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(233,30,140,0.2); }
.join-step:not(:last-child)::after {
  content: '→'; position: absolute; right: -14px; top: 50%;
  transform: translateY(-50%); font-size: 20px; color: var(--brand-primary);
  z-index: 1;
}
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--brand-gradient); color: #fff;
  font-size: 20px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
}
.step-title { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.step-desc { font-size: 13px; color: var(--text-secondary); }

/* =============================================
   联系我们
   ============================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info-list { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px; background: var(--bg-light);
  border-radius: var(--radius-md); border: 1px solid var(--border-light);
  transition: var(--transition);
}
.contact-item:hover { border-color: var(--brand-primary); background: var(--brand-light); }
.contact-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--brand-gradient); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.contact-label { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.qr-codes { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: var(--radius-sm); border: 2px solid var(--border-light); }
.qr-label { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

/* =============================================
   社区入口
   ============================================= */
.community-entries { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.community-entry {
  padding: 20px 16px; border-radius: var(--radius-md);
  background: var(--bg-card); border: 1px solid var(--border-light);
  text-align: center; transition: var(--transition); cursor: pointer;
}
.community-entry:hover { background: var(--brand-light); border-color: var(--brand-primary); transform: translateY(-2px); }
.entry-icon { font-size: 32px; margin-bottom: 10px; }
.entry-title { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.entry-desc { font-size: 12px; color: var(--text-muted); }

/* =============================================
   AI赋能区块
   ============================================= */
.ai-section { background: var(--brand-dark); color: #fff; }
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ai-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg); padding: 28px 24px;
  transition: var(--transition);
}
.ai-card:hover { background: rgba(233,30,140,0.15); border-color: rgba(233,30,140,0.4); transform: translateY(-4px); }
.ai-icon { font-size: 36px; margin-bottom: 16px; }
.ai-title { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.ai-desc { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.7; }

/* =============================================
   统计数字
   ============================================= */
.stats-section { background: var(--brand-gradient); color: #fff; padding: 60px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-item { padding: 20px; }
.stat-num { font-size: 42px; font-weight: 900; line-height: 1; margin-bottom: 8px; }
.stat-label { font-size: 14px; opacity: 0.85; }

/* =============================================
   CTA 区块
   ============================================= */
.cta-section {
  background: var(--brand-dark);
  position: relative; overflow: hidden;
  padding: 80px 0; text-align: center;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(233,30,140,0.3) 0%, transparent 70%);
}
.cta-content { position: relative; z-index: 1; }
.cta-title { font-size: clamp(28px, 4vw, 44px); font-weight: 900; color: #fff; margin-bottom: 16px; }
.cta-desc { font-size: 17px; color: rgba(255,255,255,0.75); margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* =============================================
   社交分享
   ============================================= */
.share-bar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 16px 0; border-top: 1px solid var(--border-light);
}
.share-label { font-size: 13px; color: var(--text-muted); font-weight: 600; }
.share-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: 50px; font-size: 13px; font-weight: 600;
  transition: var(--transition); cursor: pointer; border: none;
}
.share-wechat { background: #07C160; color: #fff; }
.share-weibo { background: #E6162D; color: #fff; }
.share-douyin { background: #010101; color: #fff; }
.share-bilibili { background: #00A1D6; color: #fff; }
.share-btn:hover { transform: translateY(-2px); filter: brightness(1.1); }

/* =============================================
   页脚
   ============================================= */
.site-footer { background: var(--brand-darker); color: rgba(255,255,255,0.75); }
.footer-main { padding: 60px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo img { width: 36px; height: 36px; border-radius: 50%; }
.footer-logo-text { font-size: 18px; font-weight: 800; background: var(--brand-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-desc { font-size: 13px; line-height: 1.8; color: rgba(255,255,255,0.5); margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-social a:hover { background: var(--brand-primary); color: #fff; }
.footer-col-title { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links a:hover { color: var(--brand-primary); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
}
.footer-bottom-left { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom-right { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-bottom-right a { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom-right a:hover { color: var(--brand-primary); }
.footer-update { font-size: 12px; color: rgba(255,255,255,0.3); margin-top: 4px; }

/* =============================================
   内页 Banner
   ============================================= */
.page-banner {
  background: var(--brand-dark); padding: 60px 0;
  position: relative; overflow: hidden;
}
.page-banner::before {
  content: ''; position: absolute; inset: 0;
  background: var(--brand-gradient2); opacity: 0.15;
}
.page-banner-content { position: relative; z-index: 1; }
.page-banner h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 900; color: #fff; margin-bottom: 10px; }
.page-banner p { font-size: 16px; color: rgba(255,255,255,0.7); }

/* =============================================
   侧边栏
   ============================================= */
.content-with-sidebar { display: grid; grid-template-columns: 1fr 300px; gap: 32px; align-items: start; }
.sidebar-widget {
  background: var(--bg-card); border-radius: var(--radius-md);
  border: 1px solid var(--border-light); overflow: hidden;
  margin-bottom: 24px;
}
.widget-title {
  padding: 16px 20px; font-size: 15px; font-weight: 700;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-light);
  display: flex; align-items: center; gap: 8px;
}
.widget-body { padding: 16px 20px; }
.hot-list { display: flex; flex-direction: column; gap: 12px; }
.hot-item { display: flex; gap: 10px; align-items: flex-start; }
.hot-rank {
  width: 22px; height: 22px; border-radius: 4px; flex-shrink: 0;
  background: var(--bg-light); color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
}
.hot-rank.p7506 { background: var(--brand-gradient); color: #fff; }
.hot-title { font-size: 13px; color: var(--text-primary); line-height: 1.5; }
.hot-title:hover { color: var(--brand-primary); }
.hot-views { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

/* =============================================
   分页
   ============================================= */
.pagination { display: flex; gap: 8px; justify-content: center; padding: 40px 0; flex-wrap: wrap; }
.page-btn {
  min-width: 38px; height: 38px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 600; padding: 0 8px;
  border: 1px solid var(--border-light); color: var(--text-secondary);
  transition: var(--transition); cursor: pointer;
}
.page-btn:hover, .page-btn.active {
  background: var(--brand-gradient); color: #fff; border-color: transparent;
}
.page-btn.prev, .page-btn.next { padding: 0 16px; }

/* =============================================
   视频直播卡片 (直播状态标识)
   ============================================= */
.live-badge {
  display: inline-flex; align-items: center; gap: 4px;
  background: #FF3B30; color: #fff;
  font-size: 11px; font-weight: 700;
  padding: 2px 8px; border-radius: 4px;
  animation: live-pulse 1.5s infinite;
}
.live-badge::before { content: '●'; font-size: 8px; }
@keyframes live-pulse { 0%,100%{opacity:1} 50%{opacity:0.7} }

/* =============================================
   响应式 - 移动端适配 (百度移动端权重高)
   ============================================= */
@media (max-width: 1024px) {
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .content-with-sidebar { grid-template-columns: 1fr; }
  .sidebar { order: -1; }
}
@media (max-width: 768px) {
  .section-pad { padding: 50px 0; }
  .section-pad-sm { padding: 36px 0; }
  .hero-section { min-height: 420px; }
  .hero-stats { gap: 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .join-steps { grid-template-columns: repeat(2, 1fr); }
  .join-step:not(:last-child)::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .community-entries { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 8px; }
  .site-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; padding: 16px; box-shadow: var(--shadow-md); z-index: 999; flex-direction: column; gap: 4px; }
  .site-nav.open { display: flex; }
  .hamburger { display: flex; }
  .header-actions .btn-outline { display: none; }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .video-grid-2 { grid-template-columns: 1fr; }
  .category-tabs { gap: 6px; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 6px; }
  .cat-tab { padding: 6px 14px; font-size: 13px; flex-shrink: 0; }
  .search-bar-inner { padding: 0 12px; }
  .search-hot-tags { padding: 4px 12px; }
  .hero-content { padding: 40px 0; }
  .section-header { margin-bottom: 30px; }
}
@media (max-width: 480px) {
  .video-grid-4, .video-grid-3, .video-grid-2 { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .join-steps { grid-template-columns: 1fr; }
  .hero-title { font-size: 26px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .community-entries { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 16px; }
  .hero-stat-num { font-size: 22px; }
  .btn { padding: 10px 20px; font-size: 14px; }
  .play-icon { width: 48px; height: 48px; }
  .play-icon svg { width: 20px; height: 20px; }
}

/* =============================================
   动画
   ============================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.cm8me { animation: fadeInUp 0.6s ease both; }
.66fz6gcn { animation-delay: 0.1s; }
.sq8v46r { animation-delay: 0.2s; }
.ugi6i7 { animation-delay: 0.3s; }
.v3f21r { animation-delay: 0.4s; }
.ktd5zd { animation-delay: 0.5s; }

/* =============================================
   骨架屏加载
   ============================================= */
.skeleton {
  background: linear-gradient(90deg, #f0e6f8 25%, #f8f0ff 50%, #f0e6f8 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* =============================================
   滚动条
   ============================================= */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: var(--brand-primary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--brand-accent); }

/* =============================================
   选中颜色
   ============================================= */
::selection { background: rgba(233,30,140,0.2); color: var(--brand-primary); }

/* =============================================
   图片懒加载占位
   ============================================= */
img[data-src] { background: var(--bg-light); min-height: 60px; }

/* =============================================
   视频标签 (百度收录视频关键词辅助)
   ============================================= */
.video-keyword-tag {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; color: var(--text-muted);
  padding: 2px 8px; background: var(--bg-light);
  border-radius: 4px; margin-right: 4px; margin-top: 4px;
}
.video-keyword-tag::before { content: '#'; color: var(--brand-primary); font-weight: 700; }