/* =============================================
   溏心vlog - 主样式文件
   Brand: 溏心vlog | Domain: ngxz5g.cn
   ============================================= */

/* CSS变量定义 */
:root {
  --primary: #7C3AED;
  --primary-dark: #5B21B6;
  --primary-light: #A78BFA;
  --secondary: #3B82F6;
  --secondary-dark: #1D4ED8;
  --accent: #F59E0B;
  --accent-pink: #EC4899;
  --dark: #0F172A;
  --dark-2: #1E293B;
  --dark-3: #334155;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: #2D3748;
  --card-bg: #1A2332;
  --gradient-main: linear-gradient(135deg, #7C3AED 0%, #3B82F6 100%);
  --gradient-dark: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --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', 'Hiragino Sans GB', sans-serif;
  background: var(--dark);
  color: var(--text-primary);
  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 { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark-2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

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

/* =============================================
   头部导航
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-wrap img {
  height: 40px;
  width: auto;
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--text-primary);
  background: rgba(124, 58, 237, 0.15);
}
.main-nav a.active { color: var(--primary-light); }

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 0 14px;
  gap: 8px;
  min-width: 200px;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}
.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 14px;
  width: 100%;
  padding: 8px 0;
}
.header-search input::placeholder { color: var(--text-muted); }
.search-btn {
  background: none;
  color: var(--text-muted);
  padding: 0;
  font-size: 16px;
  transition: var(--transition);
}
.search-btn:hover { color: var(--primary-light); }

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* =============================================
   英雄区域
   ============================================= */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.5);
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124,58,237,0.4) 0%, rgba(15,23,42,0.7) 60%, rgba(15,23,42,0.95) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.4);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 12px;
  color: var(--primary-light);
  margin-bottom: 20px;
}
.hero-badge::before { content: '▶'; font-size: 10px; }
.hero-title {
  font-size: clamp(32px, 5vw, 60px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 700px;
}
.hero-title .brand { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
  transition: var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(124,58,237,0.5); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.2);
  transition: var(--transition);
}
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.4); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 28px; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-stat .label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* =============================================
   通用区块
   ============================================= */
.section { padding: 70px 20px; }
.section-alt { background: var(--dark-2); }
.container { max-width: 1280px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  background: rgba(124,58,237,0.15);
  color: var(--primary-light);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.section-title {
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-title .highlight { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-desc { color: var(--text-secondary); font-size: 15px; max-width: 560px; margin: 0 auto; }

/* =============================================
   动漫视频卡片
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(124,58,237,0.4);
}
.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(1.06); }
.play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.video-card:hover .play-overlay { opacity: 1; }
.play-btn {
  width: 56px;
  height: 56px;
  background: rgba(124,58,237,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  transform: scale(0.8);
  transition: transform 0.3s ease;
  box-shadow: 0 4px 20px rgba(124,58,237,0.6);
}
.video-card:hover .play-btn { transform: scale(1); }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  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;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-author { font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; }

/* =============================================
   功能模块卡片
   ============================================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(124,58,237,0.3); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(124,58,237,0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.feature-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.feature-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* =============================================
   专家展示
   ============================================= */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(124,58,237,0.3); }
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 14px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  border: 3px solid rgba(124,58,237,0.4);
}
.expert-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--primary-light); margin-bottom: 10px; }
.expert-bio { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 16px; }
.expert-tag {
  background: rgba(124,58,237,0.12);
  color: var(--primary-light);
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: 12px;
  padding: 2px 10px;
  font-size: 11px;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-primary { background: var(--primary); color: #fff; }
.btn-sm-primary:hover { background: var(--primary-dark); }
.btn-sm-outline { border: 1px solid var(--border); color: var(--text-secondary); }
.btn-sm-outline:hover { border-color: var(--primary); color: var(--primary-light); }

/* =============================================
   合作品牌Logo墙
   ============================================= */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}
.partner-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
  min-height: 70px;
}
.partner-item:hover { border-color: var(--primary); color: var(--primary-light); background: rgba(124,58,237,0.08); }

/* =============================================
   FAQ
   ============================================= */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(124,58,237,0.4); }
.faq-question {
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  gap: 12px;
  user-select: none;
}
.faq-question:hover { color: var(--primary-light); }
.faq-icon {
  width: 24px;
  height: 24px;
  background: rgba(124,58,237,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--primary-light);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* =============================================
   用户评论
   ============================================= */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.review-stars { color: var(--accent); font-size: 14px; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: 13px; font-weight: 600; }
.review-date { font-size: 11px; color: var(--text-muted); }

/* =============================================
   How-To加入社区
   ============================================= */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  position: relative;
}
.step-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  text-align: center;
  position: relative;
}
.step-num {
  width: 44px;
  height: 44px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 14px;
}
.step-title { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.step-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* =============================================
   联系我们
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
}
.contact-title { font-size: 20px; font-weight: 700; margin-bottom: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 14px;
}
.contact-icon {
  width: 36px;
  height: 36px;
  background: rgba(124,58,237,0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.contact-label { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-weight: 500; color: var(--text-primary); }
.qr-grid { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.qr-label { font-size: 12px; color: var(--text-muted); margin-top: 6px; }

/* =============================================
   社交分享
   ============================================= */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-label { font-size: 14px; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.share-btn:hover { transform: translateY(-2px); }
.share-wechat:hover { background: #07C160; border-color: #07C160; color: #fff; }
.share-weibo:hover { background: #E6162D; border-color: #E6162D; color: #fff; }
.share-douyin:hover { background: #000; border-color: #000; color: #fff; }
.share-bilibili:hover { background: #00A1D6; border-color: #00A1D6; color: #fff; }

/* =============================================
   页脚
   ============================================= */
.site-footer {
  background: #080F1A;
  border-top: 1px solid var(--border);
  padding: 60px 20px 0;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text { font-size: 22px; margin-bottom: 14px; }
.footer-desc { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.footer-col-title { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 13px; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary-light); }
.footer-icp { display: flex; gap: 16px; flex-wrap: wrap; }

/* =============================================
   面包屑
   ============================================= */
.breadcrumb {
  padding: 14px 20px;
  background: var(--dark-2);
  border-bottom: 1px solid var(--border);
}
.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb-inner a { color: var(--text-muted); }
.breadcrumb-inner a:hover { color: var(--primary-light); }
.breadcrumb-sep { color: var(--border); }
.breadcrumb-current { color: var(--text-primary); }

/* =============================================
   标签页
   ============================================= */
.tab-nav {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
  overflow-x: auto;
  padding-bottom: 0;
}
.tab-btn {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: var(--transition);
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--primary-light); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* =============================================
   AI赋能区块
   ============================================= */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ai-card {
  background: linear-gradient(135deg, rgba(124,58,237,0.1) 0%, rgba(59,130,246,0.08) 100%);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
}
.ai-card:hover { border-color: rgba(124,58,237,0.5); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.ai-icon { font-size: 36px; margin-bottom: 14px; }
.ai-title { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.ai-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* =============================================
   社区功能
   ============================================= */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.community-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.community-card:hover { border-color: var(--accent-pink); transform: translateY(-3px); }
.community-icon { font-size: 32px; margin-bottom: 10px; }
.community-name { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.community-count { font-size: 12px; color: var(--text-muted); }

/* =============================================
   移动端适配
   ============================================= */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(15,23,42,0.98);
    padding: 20px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
    gap: 4px;
  }
  .hamburger { display: flex; }
  .header-search { display: none; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .ai-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .section { padding: 48px 16px; }
}
@media (max-width: 480px) {
  .hero-content { padding: 60px 16px; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
}

/* =============================================
   懒加载占位
   ============================================= */
.lazy { opacity: 0; transition: opacity 0.5s ease; }
.lazy.loaded { opacity: 1; }

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

/* =============================================
   通知提示
   ============================================= */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-size: 14px;
  z-index: 9999;
  transform: translateX(120%);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-lg);
}
.toast.show { transform: translateX(0); }
.toast.success { border-left: 3px solid #10B981; }

/* =============================================
   内页Banner
   ============================================= */
.page-banner {
  background: linear-gradient(135deg, rgba(124,58,237,0.3) 0%, rgba(59,130,246,0.2) 100%);
  border-bottom: 1px solid var(--border);
  padding: 48px 20px;
  text-align: center;
}
.page-banner h1 { font-size: clamp(24px, 4vw, 42px); font-weight: 800; margin-bottom: 10px; }
.page-banner p { color: var(--text-secondary); font-size: 15px; }

/* =============================================
   补充：回到顶部按钮
   ============================================= */
.back-top {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 999;
  pointer-events: none;
  box-shadow: 0 4px 16px rgba(124,58,237,0.45);
}
.back-top:hover { transform: translateY(-3px); }

/* =============================================
   补充：视频卡片描述文字
   ============================================= */
.video-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* =============================================
   补充：娱乐专区 / TikTok风格卡片
   ============================================= */
.entertain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.entertain-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.entertain-card:hover {
  transform: translateY(-4px);
  border-color: rgba(236,72,153,0.4);
  box-shadow: 0 8px 32px rgba(236,72,153,0.15);
}
.entertain-thumb {
  position: relative;
  aspect-ratio: 9/16;
  overflow: hidden;
  background: var(--dark-3);
}
.entertain-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.entertain-card:hover .entertain-thumb img { transform: scale(1.06); }
.entertain-thumb .play-overlay { opacity: 0; }
.entertain-card:hover .play-overlay { opacity: 1; }
.entertain-info { padding: 12px 14px; }
.entertain-title {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.entertain-meta { font-size: 11px; color: var(--text-muted); }

/* =============================================
   补充：关于我们页面网格
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.about-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.about-text h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 800; margin-bottom: 16px; }
.about-text p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 14px; }
.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.about-stat {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}
.about-stat .num { font-size: 28px; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.about-stat .label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* =============================================
   补充：内页文章内容区
   ============================================= */
.content-section { padding: 56px 0; }
.content-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
}
.content-card h2 { font-size: 22px; font-weight: 700; margin-bottom: 14px; }
.content-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: var(--primary-light); }
.content-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 12px; }
.content-card ul { padding-left: 20px; }
.content-card ul li { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 6px; list-style: disc; }

/* =============================================
   补充：工具卡片
   ============================================= */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  text-align: center;
}
.tool-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124,58,237,0.4);
  box-shadow: var(--shadow-md);
}
.tool-icon { font-size: 40px; margin-bottom: 14px; }
.tool-name { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.tool-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(124,58,237,0.15);
  color: var(--primary-light);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: 20px;
  padding: 7px 18px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
}
.tool-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* =============================================
   补充：标签云
   ============================================= */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.tag-item {
  background: rgba(124,58,237,0.1);
  color: var(--primary-light);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: 14px;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
}
.tag-item:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* =============================================
   补充：社区帖子卡片
   ============================================= */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
}
.post-card:hover { transform: translateY(-3px); border-color: rgba(236,72,153,0.3); }
.post-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.post-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--gradient-main);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: #fff; flex-shrink: 0;
}
.post-author { font-size: 13px; font-weight: 600; }
.post-time { font-size: 11px; color: var(--text-muted); }
.post-title { font-size: 15px; font-weight: 600; margin-bottom: 8px; line-height: 1.5; }
.post-excerpt { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.post-footer { display: flex; gap: 16px; font-size: 12px; color: var(--text-muted); }

/* =============================================
   补充：创作者排行榜
   ============================================= */
.rank-list { display: flex; flex-direction: column; gap: 12px; }
.rank-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}
.rank-item:hover { border-color: rgba(124,58,237,0.3); }
.rank-num {
  width: 32px; height: 32px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 800; color: #fff; flex-shrink: 0;
}
.rank-num.top1 { background: linear-gradient(135deg, #F59E0B, #EF4444); }
.rank-num.top2 { background: linear-gradient(135deg, #94A3B8, #64748B); }
.rank-num.top3 { background: linear-gradient(135deg, #CD7C2F, #92400E); }
.rank-info { flex: 1; }
.rank-name { font-size: 15px; font-weight: 600; margin-bottom: 3px; }
.rank-desc { font-size: 12px; color: var(--text-muted); }
.rank-score { font-size: 16px; font-weight: 700; color: var(--primary-light); }

/* =============================================
   补充：情感专区卡片
   ============================================= */
.emotion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.emotion-card {
  background: linear-gradient(135deg, rgba(236,72,153,0.1) 0%, rgba(124,58,237,0.08) 100%);
  border: 1px solid rgba(236,72,153,0.2);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}
.emotion-card:hover { border-color: rgba(236,72,153,0.5); transform: translateY(-3px); box-shadow: 0 8px 32px rgba(236,72,153,0.15); }
.emotion-icon { font-size: 40px; margin-bottom: 12px; }
.emotion-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.emotion-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* =============================================
   补充：SEO文章列表
   ============================================= */
.article-list { display: flex; flex-direction: column; gap: 16px; }
.article-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: var(--transition);
}
.article-item:hover { border-color: rgba(124,58,237,0.3); transform: translateX(4px); }
.article-thumb {
  width: 120px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--dark-3);
}
.article-thumb img { width: 100%; height: 100%; object-fit: cover; }
.article-body { flex: 1; }
.article-cat { font-size: 11px; color: var(--primary-light); margin-bottom: 6px; font-weight: 600; }
.article-title { font-size: 16px; font-weight: 600; margin-bottom: 8px; line-height: 1.5; }
.article-excerpt { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 8px; }
.article-meta { font-size: 11px; color: var(--text-muted); display: flex; gap: 12px; }

/* =============================================
   补充：响应式补充
   ============================================= */
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
  .entertain-grid { grid-template-columns: repeat(2, 1fr); }
  .emotion-grid { grid-template-columns: 1fr 1fr; }
  .article-item { flex-direction: column; }
  .article-thumb { width: 100%; height: 160px; }
}
@media (max-width: 480px) {
  .entertain-grid { grid-template-columns: repeat(2, 1fr); }
  .emotion-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
}