/* 糖心vlog - 主样式文件 */
/* 原创设计 © 2025 糖心vlog | jviktie.cn */

/* ===== CSS变量 ===== */
:root {
  --primary: #e8195a;
  --primary-dark: #c0134a;
  --primary-light: #ff4d7e;
  --secondary: #ff7043;
  --accent: #7c3aed;
  --accent-light: #a78bfa;
  --bg-dark: #0d0d1a;
  --bg-card: #161628;
  --bg-card2: #1e1e35;
  --text-primary: #f0f0f8;
  --text-secondary: #a0a0c0;
  --text-muted: #6060a0;
  --border: #2a2a50;
  --gradient-main: linear-gradient(135deg, #e8195a 0%, #7c3aed 100%);
  --gradient-card: linear-gradient(180deg, rgba(232,25,90,0.15) 0%, rgba(124,58,237,0.05) 100%);
  --shadow-card: 0 4px 24px rgba(232,25,90,0.12);
  --shadow-hover: 0 8px 40px rgba(232,25,90,0.25);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== 基础重置 ===== */
*, *::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(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

/* 无障碍：屏幕阅读器专用 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

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

/* ===== 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: 0.5px;
}
.top-bar a { color: #fff; text-decoration: underline; }

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,26,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
}
.navbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-logo img.favicon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
}
.nav-logo img.logo-full {
  height: 36px;
  width: auto;
  max-width: 120px;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  flex-wrap: nowrap;
  overflow: hidden;
}
.nav-menu a {
  padding: 7px 11px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
  background: rgba(232,25,90,0.1);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn-login {
  padding: 7px 18px;
  border-radius: 20px;
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-login:hover { background: var(--primary); color: #fff; }
.btn-vip {
  padding: 7px 18px;
  border-radius: 20px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-vip:hover { opacity: 0.85; transform: translateY(-1px); }

/* ===== 搜索栏 ===== */
.search-bar-wrap {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
}
.search-bar-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.search-form {
  display: flex;
  flex: 1;
  max-width: 600px;
  min-width: 200px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.search-form:focus-within { border-color: var(--primary); }
.search-input {
  flex: 1;
  padding: 10px 20px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 14px;
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  padding: 10px 20px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity var(--transition);
  white-space: nowrap;
}
.search-btn:hover { opacity: 0.85; }
.search-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.search-tag {
  padding: 4px 12px;
  border-radius: 12px;
  background: rgba(232,25,90,0.1);
  color: var(--primary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
}
.search-tag:hover { background: var(--primary); color: #fff; }

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

/* ===== 英雄区域 ===== */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--bg-dark);
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,13,26,0.95) 40%, rgba(13,13,26,0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 80px 20px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(232,25,90,0.15);
  border: 1px solid rgba(232,25,90,0.3);
  border-radius: 20px;
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 60px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  max-width: 600px;
}
.hero h1 .highlight {
  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: 480px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border-radius: 28px;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(232,25,90,0.4);
  border: none;
  cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(232,25,90,0.5); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
}
.btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: var(--primary); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
}
.hero-stat .num {
  font-size: 28px;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ===== 通用容器 ===== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 64px 0; }
.section-alt { background: var(--bg-card); }
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 16px;
}
.section-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  position: relative;
  padding-left: 16px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: var(--gradient-main);
  border-radius: 2px;
}
.section-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}
.view-all {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.view-all:hover { opacity: 0.75; }

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }
.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: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(232,25,90,0.3);
}
.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 var(--transition);
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
/* 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(0,0,0,0.35);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(232,25,90,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  transform: scale(0.85);
  transition: transform var(--transition);
  box-shadow: 0 4px 20px rgba(232,25,90,0.5);
}
.video-card:hover .play-circle { transform: scale(1); }
.play-circle svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.78);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--text-primary);
  transition: color var(--transition);
}
.video-card:hover .video-title { color: var(--primary-light); }
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats { display: flex; gap: 12px; }
.video-stat {
  display: flex;
  align-items: center;
  gap: 4px;
}
.video-stat svg { width: 13px; height: 13px; fill: currentColor; }
.video-tag {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(124,58,237,0.15);
  color: var(--accent-light);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

/* ===== H5 Video 播放器 ===== */
.video-player-container {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}
.video-player-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.video-player-container .video-poster-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(0,0,0,0.45);
  transition: opacity var(--transition);
}
.video-player-container:hover .video-poster-overlay { opacity: 0; }
.video-player-container.playing .video-poster-overlay { display: none; }

/* ===== 分类标签栏 ===== */
.category-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.cat-tab {
  padding: 8px 20px;
  border-radius: 20px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.cat-tab:hover,
.cat-tab.active {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
}

/* ===== 特色区块 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all 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 var(--transition);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(232,25,90,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 28px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== 娱乐专区卡片 ===== */
.ent-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.ent-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}
.ent-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(232,25,90,0.3);
}
.ent-card-img {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--bg-card2);
}
.ent-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.ent-card:hover .ent-card-img img { transform: scale(1.06); }
.ent-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,13,26,0.9) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.ent-card-overlay .video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  background: rgba(0,0,0,0.3);
}
.ent-card:hover .ent-card-overlay .video-play-btn { opacity: 1; }
.ent-card-info { padding: 14px; }
.ent-card-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ent-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}
.ent-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
  background: var(--gradient-main);
  color: #fff;
  z-index: 2;
}

/* ===== AI赋能专区 ===== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.ai-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #e8195a, #7c3aed, #00d4ff);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.ai-card:hover::after { transform: scaleX(1); }
.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(124,58,237,0.25);
}
.ai-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(232,25,90,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 18px;
}
.ai-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.ai-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.ai-tag {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 10px;
  border-radius: 10px;
  background: rgba(124,58,237,0.15);
  color: var(--accent-light);
  font-size: 11px;
  font-weight: 600;
}

/* ===== 专家展示 ===== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(232,25,90,0.3);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  border: 3px solid rgba(232,25,90,0.3);
}
.expert-name { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--primary-light); margin-bottom: 12px; }
.expert-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.expert-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 16px;
}
.expert-tag {
  padding: 3px 10px;
  background: rgba(124,58,237,0.15);
  color: var(--accent-light);
  border-radius: 10px;
  font-size: 11px;
}
.expert-actions { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 6px 14px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-sm-primary { background: var(--gradient-main); color: #fff; border: none; }
.btn-sm-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-sm-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ===== 合作品牌 ===== */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all var(--transition);
  min-height: 70px;
}
.partner-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(232,25,90,0.05);
}

/* ===== 用户评价 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}
.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.review-stars { display: flex; gap: 3px; margin-bottom: 12px; color: #fbbf24; font-size: 16px; }
.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: 14px; font-weight: 600; }
.review-date { font-size: 12px; color: var(--text-muted); }

/* ===== FAQ ===== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(232,25,90,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
  font-size: 16px;
  color: var(--primary);
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.4s ease;
}
.faq-item.open .faq-answer { padding: 0 24px 18px; max-height: 400px; }
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h2 { font-size: 28px; font-weight: 800; margin-bottom: 20px; }
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  align-items: flex-start;
}
.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(232,25,90,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-text .label { font-size: 13px; color: var(--text-muted); margin-bottom: 2px; }
.contact-text .value { font-size: 15px; font-weight: 600; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.qr-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}
.qr-item img { width: 140px; height: 140px; margin: 0 auto 12px; border-radius: 8px; }
.qr-label { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.qr-sub { font-size: 12px; color: var(--text-muted); }

/* ===== 社交分享 ===== */
.share-section {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 16px 20px;
}
.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: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}
.share-wechat  { background: rgba(7,193,96,0.1);   color: #07c160; border-color: rgba(7,193,96,0.2); }
.share-weibo   { background: rgba(230,22,45,0.1);  color: #e6162d; border-color: rgba(230,22,45,0.2); }
.share-douyin  { background: rgba(0,0,0,0.3);      color: #fff;    border-color: #333; }
.share-bilibili{ background: rgba(0,161,214,0.1);  color: #00a1d6; border-color: rgba(0,161,214,0.2); }
.share-btn:hover { transform: translateY(-2px); opacity: 0.85; }

/* ===== 页脚 ===== */
footer {
  background: #080814;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 16px 0 20px;
  max-width: 300px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.footer-logo img { height: 32px; width: auto; }
.footer-logo .brand {
  font-size: 18px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--text-muted); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--primary); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: var(--text-muted); }

/* ===== 加入社区 CTA ===== */
.join-section {
  background: var(--gradient-main);
  padding: 80px 20px;
  text-align: center;
}
.join-section h2 { font-size: clamp(24px, 4vw, 42px); font-weight: 900; color: #fff; margin-bottom: 16px; }
.join-section p { font-size: 16px; color: rgba(255,255,255,0.85); margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }
.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: #fff;
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
  border-radius: 28px;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.3); }
.btn-white-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: transparent;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border-radius: 28px;
  border: 2px solid rgba(255,255,255,0.7);
  transition: all var(--transition);
}
.btn-white-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-primary); }

/* ===== 分页 ===== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.page-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.page-btn:hover,
.page-btn.active {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
}

/* ===== 标签云 ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.cloud-tag {
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
  transition: all var(--transition);
  cursor: pointer;
}
.cloud-tag:hover {
  background: rgba(232,25,90,0.1);
  border-color: var(--primary);
  color: var(--primary);
}

/* ===== 通知横幅 ===== */
.notice-bar {
  background: rgba(232,25,90,0.08);
  border: 1px solid rgba(232,25,90,0.2);
  border-radius: var(--radius);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--text-secondary);
}
.notice-icon { font-size: 18px; flex-shrink: 0; }

/* ===== 内页头部 ===== */
.page-hero {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 48px 20px;
}
.page-hero h1 { font-size: clamp(24px, 4vw, 40px); font-weight: 900; margin-bottom: 12px; }
.page-hero p { font-size: 15px; color: var(--text-secondary); max-width: 600px; }

/* ===== 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: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}
.widget-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ===== 视频播放器占位 ===== */
.video-player-wrap {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}
.video-player-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
}
.video-player-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.play-btn-large {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(232,25,90,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}
.play-btn-large:hover { transform: scale(1.1); }
.play-btn-large svg { width: 32px; height: 32px; fill: #fff; margin-left: 4px; }

/* ===== 标签 ===== */
.badge { display: inline-block; padding: 3px 10px; border-radius: 10px; font-size: 11px; font-weight: 700; }
.badge-hot { background: rgba(239,68,68,0.15); color: #ef4444; }
.badge-new { background: rgba(34,197,94,0.15); color: #22c55e; }
.badge-vip { background: rgba(251,191,36,0.15); color: #fbbf24; }
.badge-exclusive { background: rgba(124,58,237,0.15); color: var(--accent-light); }

/* ===== 加载更多 ===== */
.load-more-wrap { text-align: center; margin-top: 40px; }
.btn-load-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-load-more:hover { border-color: var(--primary); color: var(--primary); }

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}
.animate-fade-in { animation: fadeInUp 0.6s ease forwards; }
.live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ef4444;
  animation: pulse 1.5s infinite;
  margin-right: 4px;
}

/* ===== 移动端适配 ===== */
@media (max-width: 1200px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .expert-grid  { grid-template-columns: repeat(3, 1fr); }
  .partner-grid { grid-template-columns: repeat(4, 1fr); }
  .review-grid  { grid-template-columns: repeat(2, 1fr); }
  .footer-grid  { grid-template-columns: 1fr 1fr; }
  .ent-grid     { grid-template-columns: repeat(3, 1fr); }
  .ai-grid      { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .video-grid-4, .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid  { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .content-with-sidebar { grid-template-columns: 1fr; }
  .hero-stats   { gap: 24px; }
  .ent-grid     { grid-template-columns: repeat(2, 1fr); }
  .ai-grid      { grid-template-columns: repeat(2, 1fr); }
  .review-grid  { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px;
    left: 0; right: 0; bottom: 0;
    background: rgba(13,13,26,0.98);
    padding: 20px;
    z-index: 999;
    overflow-y: auto;
  }
  .hamburger { display: flex; }
  .nav-actions .btn-login { display: none; }
  .video-grid-4, .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .expert-grid  { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid  { grid-template-columns: 1fr; }
  .footer-grid  { grid-template-columns: 1fr; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .hero-stats   { flex-wrap: wrap; gap: 20px; }
  .section      { padding: 40px 0; }
  .ent-grid     { grid-template-columns: repeat(2, 1fr); }
  .ai-grid      { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .video-grid, .video-grid-4, .video-grid-3 { grid-template-columns: 1fr; }
  .expert-grid  { grid-template-columns: 1fr; }
  .ent-grid     { grid-template-columns: 1fr; }
  .hero h1      { font-size: 28px; }
  .hero-actions { flex-direction: column; }
  .qr-grid      { grid-template-columns: 1fr; }
  .footer-links { gap: 12px; }
}

/* ===== 关于我们页面专属样式 ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: start;
  margin-bottom: 48px;
}
.about-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-item {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: all var(--transition);
}
.stat-item:hover {
  border-color: rgba(232,25,90,0.4);
  transform: translateY(-2px);
}
.stat-num {
  font-size: 24px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}
.stat-label { font-size: 13px; color: var(--text-muted); }

/* expert-img 补充 */
.expert-img {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: var(--radius) var(--radius) 0 0;
}
.expert-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.expert-card:hover .expert-img img { transform: scale(1.05); }
.expert-info { padding: 16px; }
.expert-title { font-size: 13px; color: var(--primary); margin-bottom: 8px; font-weight: 500; }

/* contact-card 补充 */
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: all var(--transition);
}
.contact-card:hover {
  border-color: rgba(232,25,90,0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.contact-icon { font-size: 36px; margin-bottom: 12px; }
.contact-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.contact-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 4px; }

/* ===== 响应式补充 ===== */
@media (max-width: 900px) {
  .about-intro { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .about-stats { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}