/* ============================================================
   抖阴 - 全站样式表
   原创设计 | bdrapp.cn
   ============================================================ */

/* ---- CSS变量 ---- */
:root {
  --primary: #FF4E8A;
  --primary-dark: #d63870;
  --secondary: #7B2FBE;
  --accent: #FF8C42;
  --accent2: #00D4FF;
  --bg-dark: #0A0A12;
  --bg-card: #12121E;
  --bg-card2: #1A1A2E;
  --border: rgba(255,255,255,0.08);
  --text-primary: #F0F0F8;
  --text-secondary: #A0A0C0;
  --text-muted: #606080;
  --gradient-main: linear-gradient(135deg, #FF4E8A 0%, #7B2FBE 100%);
  --gradient-card: linear-gradient(135deg, #1A1A2E 0%, #12121E 100%);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-hover: 0 16px 48px rgba(255,78,138,0.25);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }

/* ---- 容器 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* ---- 顶部公告栏 ---- */
.top-bar {
  background: var(--gradient-main);
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
}
.top-bar a { color: #fff; text-decoration: underline; opacity: 0.9; }
.top-bar a:hover { opacity: 1; }

/* ---- 导航栏 ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,10,18,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 20px;
  max-width: 1280px;
  margin: 0 auto;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo { height: 36px; width: auto; object-fit: contain; }
.nav-favicon { height: 32px; width: 32px; border-radius: 6px; object-fit: contain; display: inline-block; }
@media (max-width: 480px) { .nav-favicon { display: none; } }
.logo-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.navbar-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.navbar-nav a:hover, .navbar-nav a.active {
  color: var(--primary);
  background: rgba(255,78,138,0.1);
}
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn-login {
  padding: 7px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.btn-login:hover { color: var(--primary); border-color: var(--primary); }
.btn-register {
  padding: 7px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  background: var(--gradient-main);
  color: #fff;
  transition: var(--transition);
}
.btn-register:hover { opacity: 0.85; transform: translateY(-1px); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}
.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- 搜索栏 ---- */
.search-bar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.search-form {
  display: flex;
  flex: 1;
  max-width: 600px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,78,138,0.15); }
.search-form input {
  flex: 1;
  padding: 10px 16px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}
.search-form input::placeholder { color: var(--text-muted); }
.search-form button {
  padding: 10px 20px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  transition: var(--transition);
}
.search-form button:hover { opacity: 0.85; }
.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
}
.search-hot-tags span { color: var(--text-muted); }
.search-hot-tags a {
  color: var(--text-secondary);
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  font-size: 12px;
  transition: var(--transition);
}
.search-hot-tags a:hover { color: var(--primary); border-color: var(--primary); background: rgba(255,78,138,0.08); }

/* ---- 移动端菜单 ---- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
}
.mobile-menu.open { display: block; }
.mobile-menu-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 280px;
  background: var(--bg-card);
  border-left: 1px solid var(--border);
  padding: 0;
  overflow-y: auto;
}
.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}
.mobile-menu-close {
  font-size: 20px;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px 8px;
}
.mobile-nav-links {
  display: flex;
  flex-direction: column;
  padding: 12px;
}
.mobile-nav-links a {
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.mobile-nav-links a:hover, .mobile-nav-links a.active {
  color: var(--primary);
  background: rgba(255,78,138,0.1);
}

/* ---- 面包屑 ---- */
.breadcrumb {
  padding: 12px 0;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }

/* ---- 页面Hero ---- */
.page-hero {
  background: linear-gradient(135deg, #0d0d1a 0%, #1a0533 50%, #0d1a33 100%);
  padding: 60px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  margin-bottom: 12px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-hero p { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ---- Hero轮播 ---- */
.hero-section { position: relative; overflow: hidden; height: 520px; }
.hero-slider { position: relative; width: 100%; height: 100%; }
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,18,0.85) 0%, rgba(10,10,18,0.4) 60%, rgba(10,10,18,0.2) 100%);
}
.hero-content {
  position: absolute;
  top: 50%;
  left: 60px;
  transform: translateY(-50%);
  max-width: 560px;
  z-index: 2;
}
.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255,78,138,0.2);
  border: 1px solid rgba(255,78,138,0.4);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 16px;
}
.hero-content h1 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.hero-content p {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 28px;
  line-height: 1.7;
}
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}
.hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
}
.hero-dot.active { background: var(--primary); width: 24px; border-radius: 4px; }

/* ---- 按钮 ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 24px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary:hover { opacity: 0.85; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,78,138,0.4); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 24px;
  border: 2px solid rgba(255,255,255,0.3);
  color: #fff;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(255,78,138,0.08); }
.btn-sm {
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-primary { background: var(--gradient-main); color: #fff; }
.btn-sm-primary:hover { opacity: 0.85; }
.btn-sm-outline { border: 1px solid var(--border); color: var(--text-secondary); }
.btn-sm-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ---- 统计栏 ---- */
.stats-bar {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-item { padding: 8px; }
.stat-num {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 6px;
}
.stat-label { font-size: 13px; color: var(--text-muted); }

/* ---- 通用Section ---- */
.section { padding: 64px 0; }
.section-alt { background: var(--bg-card); }
.section-gradient { background: linear-gradient(180deg, var(--bg-dark) 0%, #0d0d20 100%); }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 12px;
}
.section-title {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 28px;
  background: var(--gradient-main);
  border-radius: 2px;
}
.section-more { font-size: 13px; color: var(--primary); font-weight: 600; }
.section-more:hover { opacity: 0.8; }

/* ---- 分类标签 ---- */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.tab-btn {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card2);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.tab-btn:hover { color: var(--primary); border-color: var(--primary); }
.tab-btn.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(255,78,138,0.3);
}

/* ---- 弹幕 ---- */
.danmu-container {
  position: relative;
  height: 80px;
  overflow: hidden;
  margin-bottom: 24px;
  border-radius: var(--radius);
  background: linear-gradient(90deg, transparent, rgba(255,78,138,0.05) 50%, transparent);
  pointer-events: none;
}
.danmu-item {
  position: absolute;
  right: -300px;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
}
@keyframes danmu-move {
  from { right: -300px; }
  to { right: 110%; }
}

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,78,138,0.3);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-card2);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.45); }
.play-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255,78,138,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
  box-shadow: 0 4px 20px rgba(255,78,138,0.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  font-size: 10px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.tag-hot { background: #FF4E8A; color: #fff; }
.tag-new { background: #00D4FF; color: #000; }
.tag-ai { background: #7B2FBE; color: #fff; }
.video-info { padding: 14px; }
.video-title {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.video-author-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.video-author span { font-size: 12px; color: var(--text-muted); }
.video-stats {
  display: flex;
  gap: 12px;
  font-size: 11px;
  color: var(--text-muted);
}

/* ---- 视频模态框 ---- */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 3000;
  background: rgba(0,0,0,0.9);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
}
.video-modal.open { display: flex; }
.video-modal-inner {
  position: relative;
  width: 90%;
  max-width: 860px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.video-modal-inner video { width: 100%; aspect-ratio: 16/9; background: #000; }
.video-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  z-index: 10;
  transition: var(--transition);
}
.video-modal-close:hover { background: var(--primary); }
.video-modal-info { padding: 16px 20px; }
.video-modal-title { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.video-modal-meta { font-size: 12px; color: var(--text-muted); }
/* 模态框新结构 */
.video-modal-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.video-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
.video-modal-header .video-modal-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 50px);
  margin-bottom: 0;
}
.video-modal-header .video-modal-close {
  position: static;
  flex-shrink: 0;
}
.video-modal-body video {
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  display: block;
}

/* ---- 直播卡片 ---- */
.live-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.live-card {
  background: var(--bg-card2);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.live-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.live-thumb { position: relative; aspect-ratio: 4/3; overflow: hidden; }
.live-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.live-card:hover .live-thumb img { transform: scale(1.06); }
.live-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,30,30,0.85);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 4px;
}
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: pulse 1.2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.live-viewers {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
}
.live-info { padding: 12px; }
.live-name { font-size: 13px; font-weight: 700; margin-bottom: 4px; }
.live-desc { font-size: 12px; color: var(--text-muted); }

/* ---- AI卡片 ---- */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ai-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.ai-card:hover { border-color: rgba(255,78,138,0.3); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.ai-icon { font-size: 40px; display: block; margin-bottom: 16px; }
.ai-title { font-size: 18px; font-weight: 800; margin-bottom: 12px; }
.ai-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.ai-features { display: flex; flex-direction: column; gap: 8px; }
.ai-feature {
  font-size: 13px;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
}
.ai-feature::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { border-color: rgba(255,78,138,0.3); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  border: 3px solid rgba(255,78,138,0.4);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-name { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
.expert-title { font-size: 12px; color: var(--primary); font-weight: 600; margin-bottom: 12px; }
.expert-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.expert-awards { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.award-badge {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(255,78,138,0.1);
  border: 1px solid rgba(255,78,138,0.3);
  color: var(--primary);
  font-weight: 600;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }

/* ---- 合作伙伴 ---- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.partner-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px 12px;
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
}
.partner-item:hover { border-color: rgba(255,78,138,0.3); transform: translateY(-2px); }
.partner-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 10px;
}
.partner-name { font-size: 13px; font-weight: 600; color: var(--text-secondary); }

/* ---- 加入步骤 ---- */
.join-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.join-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(12.5% + 20px);
  right: calc(12.5% + 20px);
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0.3;
}
.join-step {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
  position: relative;
}
.join-step:hover { border-color: rgba(255,78,138,0.3); transform: translateY(-4px); }
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  font-size: 22px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(255,78,138,0.4);
}
.step-title { font-size: 16px; font-weight: 800; margin-bottom: 10px; }
.step-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ---- 社区卡片 ---- */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.community-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.community-card:hover { border-color: rgba(255,78,138,0.3); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.community-icon { font-size: 40px; display: block; margin-bottom: 16px; }
.community-title { font-size: 18px; font-weight: 800; margin-bottom: 12px; }
.community-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.community-count { font-size: 13px; color: var(--primary); font-weight: 700; }

/* ---- FAQ ---- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(255,78,138,0.3); }
.faq-question {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  gap: 16px;
}
.faq-question:hover { color: var(--primary); }
.faq-item.open .faq-question { color: var(--primary); }
.faq-icon {
  font-size: 20px;
  color: var(--primary);
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer-inner {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---- 用户评价 ---- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.review-card:hover { border-color: rgba(255,78,138,0.3); transform: translateY(-3px); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: 14px; font-weight: 700; }
.review-date { font-size: 11px; color: var(--text-muted); }
.review-stars { color: #FFD700; font-size: 14px; margin-bottom: 10px; }
.review-text { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.review-tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 10px;
  border-radius: 20px;
  background: rgba(123,47,190,0.15);
  border: 1px solid rgba(123,47,190,0.3);
  color: #a855f7;
  font-weight: 600;
}

/* ---- 联系我们 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-block { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.contact-icon { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.contact-text .label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.contact-text .value { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.qr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.qr-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px;
  text-align: center;
}
.qr-card img {
  width: 100px;
  height: 100px;
  margin: 0 auto 12px;
  border-radius: 8px;
  object-fit: cover;
}
.qr-title { font-size: 13px; font-weight: 700; margin-bottom: 4px; }
.qr-desc { font-size: 12px; color: var(--text-muted); }

/* ---- 分享按钮 ---- */
.share-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.share-label { font-size: 14px; color: var(--text-muted); }
.share-btn {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: var(--transition);
}
.share-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(255,78,138,0.08); }

/* ---- 徽章 ---- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}
.badge-primary {
  background: rgba(255,78,138,0.15);
  border: 1px solid rgba(255,78,138,0.3);
  color: var(--primary);
}

/* ---- Toast通知 ---- */
.toast {
  position: fixed;
  bottom: 80px;
  right: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 20px;
  min-width: 240px;
  max-width: 320px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  z-index: 5000;
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1);
  border-left: 3px solid var(--primary);
}
.toast.show { transform: translateX(0); }
.toast-title { font-size: 13px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.toast div:last-child { font-size: 12px; color: var(--text-secondary); }

/* ---- 回到顶部 ---- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1000;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(255,78,138,0.4);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255,78,138,0.5); }

/* ---- 页脚 ---- */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .footer-logo span {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-desc { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.social-link {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: var(--transition);
}
.social-link:hover { border-color: var(--primary); background: rgba(255,78,138,0.1); transform: translateY(-2px); }
.footer-social .social-link { width: auto; padding: 0 10px; font-size: 12px; font-weight: 600; gap: 4px; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 800;
  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); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright { font-size: 12px; color: var(--text-muted); }
.footer-copyright a { color: var(--text-secondary); }
.footer-copyright a:hover { color: var(--primary); }
.footer-update { font-size: 12px; color: var(--text-muted); }
.footer-links-bottom { display: flex; gap: 16px; }
.footer-links-bottom a { font-size: 12px; color: var(--text-muted); }
.footer-links-bottom a:hover { color: var(--primary); }

/* ---- 友情链接 ---- */
.footer-friends {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
}
.footer-friends-label { color: var(--text-muted); font-weight: 600; white-space: nowrap; }
.footer-friends a {
  color: var(--text-muted);
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.footer-friends a:hover { color: var(--primary); border-color: rgba(255,78,138,0.3); }

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

@media (max-width: 992px) {
  .navbar-nav { display: none; }
  .hamburger { display: flex; }
  .hero-section { height: 420px; }
  .hero-content { left: 30px; max-width: 480px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr 1fr; }
  .live-grid { grid-template-columns: repeat(2, 1fr); }
  .join-steps { grid-template-columns: repeat(2, 1fr); }
  .join-steps::before { display: none; }
  .community-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .qr-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero-section { height: 360px; }
  .hero-content { left: 20px; right: 20px; max-width: 100%; }
  .hero-content h1 { font-size: 26px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .search-bar-inner { flex-direction: column; align-items: stretch; }
  .search-form { max-width: 100%; }
  .btn-login { display: none; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-section { height: 300px; }
  .hero-content h1 { font-size: 22px; }
  .hero-btns { flex-direction: column; }
  .video-grid { grid-template-columns: 1fr; }
  .video-grid-3 { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .live-grid { grid-template-columns: 1fr; }
  .join-steps { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 40px 0; }
  .qr-grid { grid-template-columns: 1fr; }
}

/* ---- 打印样式 ---- */
@media print {
  .navbar, .search-bar, .top-bar, .back-to-top, .toast, .mobile-menu { display: none !important; }
  body { background: #fff; color: #000; }
}

/* ============================================================
   新增模块补充样式（v2.0）
   ============================================================ */

/* ---- 段落介绍文字 ---- */
.section-intro {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 32px;
  max-width: 860px;
}

/* ---- 4列视频网格 ---- */
.video-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 1200px) { .video-grid-4 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px)  { .video-grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .video-grid-4 { grid-template-columns: 1fr; } }

/* ---- 写真卡片特殊样式 ---- */
.photo-card .video-thumb { aspect-ratio: 3/4; }
.photo-card .video-thumb img { height: 100%; object-fit: cover; }

/* ---- 娱乐专区标签组 ---- */
.entertain-tabs { margin-bottom: 24px; }
.entertain-tab-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.entertain-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: default;
  transition: var(--transition);
}
.entertain-label:hover {
  border-color: rgba(255,78,138,0.4);
  color: var(--primary);
  background: rgba(255,78,138,0.06);
}

/* ---- 直播卡片 ---- */
.live-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.live-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.live-card:hover {
  border-color: rgba(255,78,138,0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.live-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.live-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.live-card:hover .live-thumb img { transform: scale(1.06); }
.live-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(220,38,38,0.9);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 5px;
}
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: blink 1.2s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }
.live-viewers {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
}
.live-info {
  padding: 14px 16px;
}
.live-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.live-desc {
  font-size: 12px;
  color: var(--text-muted);
}
@media (max-width: 1200px) { .live-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .live-grid { grid-template-columns: 1fr; } }

/* ---- 情感话题 & 亲密教育 ---- */
.emotion-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.emotion-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
  text-align: center;
}
.emotion-card:hover {
  border-color: rgba(255,78,138,0.35);
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
.emotion-icon {
  font-size: 44px;
  display: block;
  margin-bottom: 18px;
}
.emotion-title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.emotion-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
}
.emotion-tags {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.emotion-tags span {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(123,47,190,0.12);
  border: 1px solid rgba(123,47,190,0.25);
  color: #a855f7;
  font-weight: 600;
}
@media (max-width: 992px) { .emotion-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .emotion-grid { grid-template-columns: 1fr; } }

/* ---- 视频标签颜色 ---- */
.tag-ai {
  background: linear-gradient(135deg, #00D4FF, #7B2FBE) !important;
  color: #fff !important;
}

/* ---- 视频模态框底部 ---- */
.video-modal-footer {
  padding: 10px 20px;
  border-top: 1px solid var(--border);
  text-align: right;
}

/* ---- 分类标签 ---- */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.tab-btn {
  padding: 7px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.tab-btn:hover,
.tab-btn.active {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
}