/* =============================================
   每日大赛 - mxdkj.com 主样式表
   原创设计 © 2026 每日大赛
   ============================================= */

/* ---- 变量定义 ---- */
:root {
  --primary: #e8400c;
  --primary-dark: #c23208;
  --primary-light: #ff6b3d;
  --secondary: #1a1f3a;
  --secondary-light: #252b4a;
  --accent: #f5a623;
  --accent2: #00c9a7;
  --bg-dark: #0d1117;
  --bg-card: #161b2e;
  --bg-card2: #1e2540;
  --text-primary: #f0f2f5;
  --text-secondary: #a0a8c0;
  --text-muted: #6b7494;
  --border: #2a3050;
  --gradient-hero: linear-gradient(135deg, #0d1117 0%, #1a1f3a 50%, #0d1117 100%);
  --gradient-primary: linear-gradient(135deg, #e8400c, #f5a623);
  --gradient-card: linear-gradient(180deg, #161b2e 0%, #1e2540 100%);
  --shadow-card: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 32px rgba(232,64,12,0.3);
  --radius: 10px;
  --radius-lg: 16px;
  --transition: 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(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; }

/* ---- 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-notice {
  background: var(--gradient-primary);
  text-align: center;
  padding: 6px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.top-notice a { color: #fff; text-decoration: underline; }

/* =============================================
   导航栏
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,17,23,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  height: 64px;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -1px;
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: -4px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--text-primary);
  background: var(--bg-card2);
}
.main-nav a.hot { color: var(--primary-light); }
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn-live {
  background: var(--gradient-primary);
  color: #fff;
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 5px;
  animation: pulse-live 2s infinite;
}
@keyframes pulse-live {
  0%, 100% { box-shadow: 0 0 0 0 rgba(232,64,12,0.4); }
  50% { box-shadow: 0 0 0 8px rgba(232,64,12,0); }
}
.live-dot {
  width: 8px; height: 8px;
  background: #fff;
  border-radius: 50%;
  animation: blink 1s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 5px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* =============================================
   搜索框
   ============================================= */
.search-bar-wrap {
  background: var(--secondary);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.search-form {
  display: flex;
  flex: 1;
  max-width: 700px;
  background: var(--bg-card);
  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;
  background: none;
  border: none;
  padding: 9px 18px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  background: var(--gradient-primary);
  color: #fff;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 0 24px 24px 0;
}
.search-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.search-tags span { color: var(--text-muted); }
.search-tags a {
  color: var(--text-secondary);
  padding: 2px 8px;
  background: var(--bg-card);
  border-radius: 12px;
  transition: all var(--transition);
}
.search-tags a:hover { background: var(--primary); color: #fff; }

/* =============================================
   通用容器
   ============================================= */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 60px 0; }
.section-sm { padding: 40px 0; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}
.section-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--gradient-primary);
  border-radius: 2px;
}
.section-more {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}
.section-more:hover { color: var(--primary-light); }

/* =============================================
   Hero Banner
   ============================================= */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}
.hero-slider {
  position: relative;
  height: 480px;
}
.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;
  opacity: 0.6;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,17,23,0.9) 0%, rgba(13,17,23,0.4) 60%, transparent 100%);
}
.hero-content {
  position: absolute;
  top: 50%;
  left: 60px;
  transform: translateY(-50%);
  max-width: 560px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,64,12,0.2);
  border: 1px solid var(--primary);
  color: var(--primary-light);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero-title {
  font-size: 42px;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}
.hero-title span { color: var(--primary-light); }
.hero-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); color: #fff; }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary-light); }
.hero-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}
.hero-dot {
  width: 8px; height: 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: all var(--transition);
}
.hero-dot.active { width: 24px; background: var(--primary); }
.hero-stats {
  position: absolute;
  bottom: 20px;
  right: 40px;
  display: flex;
  gap: 30px;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-light);
}
.hero-stat-label { font-size: 12px; color: var(--text-muted); }

/* =============================================
   视频卡片
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.video-grid-5 { grid-template-columns: repeat(5, 1fr); }
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  border: 1px solid var(--border);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
  background: var(--bg-card2);
}
.video-thumb img {
  position: absolute;
  inset: 0;
  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: background var(--transition);
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.4); }
.play-icon {
  width: 52px; height: 52px;
  background: rgba(232,64,12,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: all var(--transition);
}
.video-card:hover .play-icon { opacity: 1; transform: scale(1); }
.play-icon svg { width: 20px; height: 20px; fill: #fff; margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}
.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}
.badge-hot { background: var(--primary); color: #fff; }
.badge-new { background: var(--accent2); color: #fff; }
.badge-live { background: #e53e3e; color: #fff; animation: blink 1s infinite; }
.badge-vip { background: var(--accent); color: #000; }
.video-info { padding: 12px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}
.video-author {
  display: flex;
  align-items: center;
  gap: 5px;
}
.author-avatar {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #fff;
  font-weight: 700;
  overflow: hidden;
}
.author-avatar img { width: 100%; height: 100%; object-fit: cover; }
.video-stats {
  display: flex;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* =============================================
   分类标签栏
   ============================================= */
.category-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 20px;
  scrollbar-width: none;
}
.category-tabs::-webkit-scrollbar { display: none; }
.cat-tab {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}
.cat-tab:hover, .cat-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* =============================================
   专家展示
   ============================================= */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.expert-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
}
.expert-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.expert-avatar {
  width: 90px; height: 90px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid var(--primary);
  overflow: hidden;
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.expert-role {
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 10px;
  font-weight: 600;
}
.expert-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 16px; }
.expert-tag {
  padding: 3px 10px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 11px;
  color: var(--text-secondary);
}
.expert-actions { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-sm-primary { background: var(--primary); color: #fff; }
.btn-sm-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-sm-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-sm-outline:hover { border-color: var(--primary); color: var(--primary-light); }

/* =============================================
   合作品牌Logo墙
   ============================================= */
.partner-wall {
  background: var(--secondary);
  border-radius: var(--radius-lg);
  padding: 30px;
}
.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  align-items: center;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all var(--transition);
}
.partner-item:hover { border-color: var(--primary); color: var(--primary-light); }

/* =============================================
   用户评价
   ============================================= */
.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition);
}
.review-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); }
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.review-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: 14px; font-weight: 700; }
.review-date { font-size: 12px; color: var(--text-muted); }
.review-stars { color: var(--accent); font-size: 14px; margin-bottom: 10px; }
.review-text { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
.review-tag {
  display: inline-block;
  margin-top: 10px;
  padding: 2px 8px;
  background: rgba(232,64,12,0.15);
  color: var(--primary-light);
  border-radius: 10px;
  font-size: 11px;
}

/* =============================================
   FAQ
   ============================================= */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--primary); }
.faq-question {
  padding: 18px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 15px;
  font-weight: 600;
  background: var(--bg-card);
  user-select: none;
}
.faq-question:hover { background: var(--bg-card2); }
.faq-icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg-card2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  background: var(--secondary);
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner {
  padding: 16px 20px;
  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: 30px;
}
.contact-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.contact-card h3 { font-size: 18px; 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(232,64,12,0.15);
  border-radius: 8px;
  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: 600; color: var(--text-primary); }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.qr-item { text-align: center; }
.qr-code {
  width: 100px; height: 100px;
  background: #fff;
  border-radius: 8px;
  margin: 0 auto 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.qr-code canvas { width: 100% !important; height: 100% !important; }
.qr-label { font-size: 12px; color: var(--text-muted); }

/* =============================================
   社区入口
   ============================================= */
.community-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.community-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
}
.community-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.community-icon {
  font-size: 36px;
  margin-bottom: 12px;
  display: block;
}
.community-name { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.community-desc { font-size: 12px; color: var(--text-muted); margin-bottom: 14px; }
.community-count { font-size: 20px; font-weight: 800; color: var(--primary-light); }
.community-count-label { font-size: 11px; color: var(--text-muted); }

/* =============================================
   AI功能展示
   ============================================= */
.ai-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ai-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.ai-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(232,64,12,0.05) 0%, transparent 60%);
  pointer-events: none;
}
.ai-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); }
.ai-icon {
  width: 52px; height: 52px;
  background: var(--gradient-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.ai-title { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.ai-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }
.ai-tag {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 10px;
  background: rgba(0,201,167,0.15);
  color: var(--accent2);
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}

/* =============================================
   How-To 指南
   ============================================= */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.howto-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 0;
}
.howto-step {
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 64px; height: 64px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 900;
  color: #fff;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(232,64,12,0.4);
}
.step-title { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.step-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* =============================================
   统计数据栏
   ============================================= */
.stats-bar {
  background: var(--secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-inner {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
}
.stat-item {
  padding: 24px 20px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 28px;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.stat-label { font-size: 13px; color: var(--text-muted); }

/* =============================================
   页脚
   ============================================= */
.site-footer {
  background: var(--secondary);
  border-top: 1px solid var(--border);
  padding: 50px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text { font-size: 22px; margin-bottom: 12px; display: block; }
.footer-desc { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.footer-social { display: flex; gap: 10px; }
.social-btn {
  width: 36px; height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all var(--transition);
  cursor: pointer;
}
.social-btn:hover { background: var(--primary); border-color: var(--primary); }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 13px; color: var(--text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary-light); }

/* =============================================
   分享按钮
   ============================================= */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.share-label { font-size: 13px; color: var(--text-muted); }
.share-btn {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--border);
  background: var(--bg-card);
  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: #010101; border-color: #69c9d0; color: #69c9d0; }
.share-bilibili:hover { background: #00a1d6; border-color: #00a1d6; color: #fff; }

/* =============================================
   面包屑
   ============================================= */
.breadcrumb {
  padding: 12px 0;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb-sep { color: var(--border); }
.breadcrumb-current { color: var(--text-secondary); }

/* =============================================
   内页Banner
   ============================================= */
.page-banner {
  background: var(--gradient-hero);
  padding: 50px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(232,64,12,0.1) 0%, transparent 70%);
}
.page-banner h1 {
  font-size: 36px;
  font-weight: 900;
  margin-bottom: 10px;
  position: relative;
}
.page-banner p { font-size: 15px; color: var(--text-secondary); position: relative; }

/* =============================================
   加载动画
   ============================================= */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card2) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius);
}
@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* =============================================
   移动端适配
   ============================================= */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .video-grid-5 { grid-template-columns: repeat(3, 1fr); }
  .partner-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .stats-inner { grid-template-columns: repeat(3, 1fr); }
  .hero-title { font-size: 32px; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    background: var(--secondary);
    padding: 16px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .hero-slider { height: 300px; }
  .hero-content { left: 20px; right: 20px; max-width: 100%; }
  .hero-title { font-size: 24px; }
  .hero-stats { display: none; }
  .video-grid, .video-grid-5, .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-features { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .howto-steps::before { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .search-tags { display: none; }
}

@media (max-width: 480px) {
  .video-grid, .video-grid-5, .video-grid-3 { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 40px 0; }
  .hero-title { font-size: 20px; }
  .hero-desc { font-size: 13px; }
}

/* =============================================
   动画效果
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* =============================================
   视频播放器模态框
   ============================================= */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 800px;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform var(--transition);
}
.modal-overlay.open .modal-content { transform: scale(1); }
.modal-video {
  position: relative;
  padding-top: 56.25%;
  background: #000;
}
.modal-video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-secondary);
}
.modal-play-big {
  width: 80px; height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition);
}
.modal-play-big:hover { transform: scale(1.1); }
.modal-play-big svg { width: 32px; height: 32px; fill: #fff; margin-left: 5px; }
.modal-info { padding: 16px 20px; }
.modal-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.modal-meta { font-size: 13px; color: var(--text-muted); display: flex; gap: 16px; }
.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px; height: 32px;
  background: rgba(0,0,0,0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  cursor: pointer;
  z-index: 10;
}

/* =============================================
   弹幕效果
   ============================================= */
.danmu-container {
  position: relative;
  overflow: hidden;
  height: 40px;
  background: rgba(0,0,0,0.3);
  border-radius: 20px;
  margin-bottom: 20px;
}
.danmu-item {
  position: absolute;
  white-space: nowrap;
  font-size: 13px;
  color: #fff;
  padding: 4px 12px;
  background: rgba(232,64,12,0.3);
  border-radius: 12px;
  top: 50%;
  transform: translateY(-50%);
  animation: danmu-scroll linear infinite;
}
@keyframes danmu-scroll {
  from { right: -300px; }
  to { right: 100%; }
}

/* =============================================
   直播卡片
   ============================================= */
.live-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.live-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
}
.live-card:hover {
  border-color: #e53e3e;
  box-shadow: 0 8px 32px rgba(229,62,62,0.3);
  transform: translateY(-4px);
}
.live-thumb {
  position: relative;
  padding-top: 56.25%;
  background: var(--bg-card2);
  overflow: hidden;
}
.live-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.live-indicator {
  position: absolute;
  top: 8px;
  left: 8px;
  background: #e53e3e;
  color: #fff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
  animation: blink 1s infinite;
}
.live-viewers {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}
.live-info { padding: 10px 12px; }
.live-title { font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.live-author { font-size: 12px; color: var(--text-muted); }

/* =============================================
   Misc
   ============================================= */
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  padding: 4px 10px;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}
.tag:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.divider {
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.highlight-box {
  background: rgba(232,64,12,0.08);
  border: 1px solid rgba(232,64,12,0.3);
  border-radius: var(--radius);
  padding: 16px 20px;
}