/* ===================================================
   捷克街头 TanHua - 主样式文件
   品牌色：深玫红 #8B1A2F | 金色 #C9A84C | 深墨 #1A1A2E
   =================================================== */

/* ---- 全局重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --brand-red:    #8B1A2F;
  --brand-dark:   #5C0E1E;
  --brand-gold:   #C9A84C;
  --brand-gold2:  #E8C96A;
  --bg-dark:      #0F0F1A;
  --bg-card:      #16162A;
  --bg-card2:     #1E1E35;
  --text-main:    #F0EAE2;
  --text-muted:   #9A8FA0;
  --text-light:   #D4C9D8;
  --border:       rgba(201,168,76,0.25);
  --radius:       10px;
  --radius-lg:    18px;
  --shadow:       0 4px 24px rgba(0,0,0,0.45);
  --transition:   0.3s ease;
}

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-main);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--brand-gold); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--brand-gold2); }

img { max-width: 100%; height: auto; display: block; }

ul, ol { list-style: none; }

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

/* ===================================================
   顶部公告条
   =================================================== */
.top-bar {
  background: linear-gradient(90deg, var(--brand-dark), var(--brand-red), var(--brand-dark));
  color: #fff;
  text-align: center;
  font-size: 0.82rem;
  padding: 6px 20px;
  letter-spacing: 0.5px;
}
.top-bar a { color: var(--brand-gold2); }

/* ===================================================
   导航栏
   =================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15,15,26,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-wrap img.site-logo {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  object-fit: contain;
}

.logo-wrap .brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--brand-gold), var(--brand-gold2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  color: var(--text-light);
  font-size: 0.92rem;
  padding: 6px 14px;
  border-radius: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--brand-red);
  color: #fff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn-login {
  background: transparent;
  border: 1px solid var(--brand-gold);
  color: var(--brand-gold);
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-login:hover { background: var(--brand-gold); color: #000; }

.btn-join {
  background: linear-gradient(135deg, var(--brand-red), var(--brand-dark));
  color: #fff;
  padding: 7px 20px;
  border-radius: 20px;
  font-size: 0.88rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-join:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(139,26,47,0.5); }

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

/* ===================================================
   搜索框
   =================================================== */
.search-bar-wrap {
  background: var(--bg-card);
  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;
  align-items: center;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 6px 16px;
  width: 100%;
  max-width: 600px;
  gap: 8px;
}

.search-form input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.9rem;
  flex: 1;
  min-width: 0;
}

.search-form input::placeholder { color: var(--text-muted); }

.search-form button {
  background: var(--brand-red);
  border: none;
  color: #fff;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  flex-shrink: 0;
}
.search-form button:hover { background: var(--brand-dark); }

.search-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.search-tags span {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg-card2);
  padding: 3px 10px;
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.search-tags span:hover { background: var(--brand-red); color: #fff; }

/* ===================================================
   面包屑
   =================================================== */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 10px 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  gap: 6px;
  align-items: center;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--brand-gold); }
.breadcrumb .sep { color: var(--border); }

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

.section {
  padding: 60px 0;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-red), var(--brand-gold));
  margin-top: 6px;
  border-radius: 2px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 36px;
  margin-top: 8px;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 30px;
  flex-wrap: wrap;
  gap: 10px;
}

.view-all {
  font-size: 0.85rem;
  color: var(--brand-gold);
  border: 1px solid var(--border);
  padding: 5px 16px;
  border-radius: 16px;
  transition: all var(--transition);
}
.view-all:hover { background: var(--brand-red); border-color: var(--brand-red); color: #fff; }

/* ===================================================
   Hero 轮播区
   =================================================== */
.hero-section {
  position: relative;
  overflow: hidden;
  background: var(--bg-dark);
}

.hero-slider {
  position: relative;
  height: 520px;
}

.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;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15,15,26,0.9) 0%, rgba(15,15,26,0.5) 50%, rgba(15,15,26,0.2) 100%);
  display: flex;
  align-items: center;
}

.hero-content {
  padding: 0 60px;
  max-width: 600px;
}

.hero-tag {
  display: inline-block;
  background: var(--brand-red);
  color: #fff;
  font-size: 0.78rem;
  padding: 3px 12px;
  border-radius: 12px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.hero-content h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #fff;
}

.hero-content h1 span { color: var(--brand-gold); }

.hero-content p {
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
  margin-bottom: 28px;
  line-height: 1.7;
}

.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.btn-primary {
  background: linear-gradient(135deg, var(--brand-red), var(--brand-dark));
  color: #fff;
  padding: 12px 28px;
  border-radius: 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(139,26,47,0.5); color: #fff; }

.btn-outline {
  background: transparent;
  color: #fff;
  padding: 11px 28px;
  border-radius: 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.5);
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-outline:hover { border-color: var(--brand-gold); color: var(--brand-gold); }

.hero-dots {
  position: absolute;
  bottom: 24px;
  left: 60px;
  display: flex;
  gap: 8px;
}

.hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all var(--transition);
}
.hero-dot.active { background: var(--brand-gold); width: 24px; border-radius: 4px; }

/* ===================================================
   视频卡片网格
   =================================================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.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(-6px);
  box-shadow: var(--shadow);
  border-color: var(--brand-gold);
}

.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); }

.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background var(--transition);
  opacity: 0;
}

.video-card:hover .play-btn { opacity: 1; background: rgba(0,0,0,0.4); }

.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(139,26,47,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: transform var(--transition);
}

.video-card:hover .play-icon { transform: scale(1); }

.play-icon::after {
  content: '';
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}

.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--brand-red);
  color: #fff;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.video-info { padding: 12px; }

.video-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
  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: 0.78rem;
  color: var(--text-muted);
}

.video-stats { display: flex; gap: 12px; }
.video-stats span { display: flex; align-items: center; gap: 4px; }

/* ===================================================
   分类标签栏
   =================================================== */
.category-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.cat-tab {
  padding: 7px 20px;
  border-radius: 20px;
  font-size: 0.88rem;
  cursor: pointer;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: transparent;
  transition: all var(--transition);
}

.cat-tab:hover,
.cat-tab.active {
  background: var(--brand-red);
  border-color: var(--brand-red);
  color: #fff;
}

/* ===================================================
   特色板块 - 大图卡片
   =================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feature-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/9;
  cursor: pointer;
}

.feature-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.feature-card:hover img { transform: scale(1.05); }

.feature-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 24px;
}

.feature-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.feature-info p { font-size: 0.85rem; color: rgba(255,255,255,0.7); }

.feature-tag {
  display: inline-block;
  background: var(--brand-red);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 10px;
  border-radius: 10px;
  margin-bottom: 8px;
}

/* ===================================================
   专家展示
   =================================================== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.expert-card:hover {
  border-color: var(--brand-gold);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 14px;
  border: 3px solid var(--brand-gold);
  object-fit: cover;
  background: var(--bg-card2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  overflow: hidden;
}

.expert-name { font-size: 1rem; font-weight: 700; color: var(--text-main); margin-bottom: 4px; }
.expert-role { font-size: 0.8rem; color: var(--brand-gold); margin-bottom: 10px; }
.expert-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }

.expert-awards {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.award-tag {
  font-size: 0.72rem;
  background: rgba(201,168,76,0.15);
  color: var(--brand-gold);
  border: 1px solid rgba(201,168,76,0.3);
  padding: 2px 8px;
  border-radius: 10px;
}

.expert-btns { display: flex; gap: 8px; justify-content: center; }

.btn-sm {
  font-size: 0.78rem;
  padding: 5px 14px;
  border-radius: 14px;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: transparent;
}
.btn-sm:hover { background: var(--brand-red); border-color: var(--brand-red); color: #fff; }

/* ===================================================
   合作品牌 Logo 墙
   =================================================== */
.partner-logos {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.partner-logo {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
  font-weight: 600;
  letter-spacing: 1px;
}

.partner-logo:hover { border-color: var(--brand-gold); color: var(--brand-gold); }

/* ===================================================
   How-To 加入指南
   =================================================== */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
}

.step-num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--brand-red), var(--brand-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 16px;
}

.step-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ===================================================
   FAQ 手风琴
   =================================================== */
.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;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  transition: background var(--transition);
}

.faq-question:hover { background: var(--bg-card2); }

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--brand-red);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  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;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 18px; }

/* ===================================================
   用户评论
   =================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.review-card:hover { border-color: var(--brand-gold); transform: translateY(-3px); }

.review-stars {
  color: var(--brand-gold);
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-red), var(--brand-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-name { font-size: 0.88rem; font-weight: 600; color: var(--text-main); }
.review-date { font-size: 0.75rem; color: var(--text-muted); }

/* ===================================================
   联系我们
   =================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 20px; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}

.contact-icon {
  width: 40px;
  height: 40px;
  background: rgba(139,26,47,0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 0.92rem; color: var(--text-main); font-weight: 500; }

.qr-codes {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.qr-item { text-align: center; }

.qr-box {
  width: 110px;
  height: 110px;
  background: #fff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  overflow: hidden;
}

.qr-box canvas { width: 100%; height: 100%; }
.qr-label { font-size: 0.78rem; color: var(--text-muted); }

/* ===================================================
   社交分享
   =================================================== */
.share-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.share-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg-card);
}

.share-btn:hover { transform: translateY(-2px); }
.share-btn.wechat:hover { background: #07C160; border-color: #07C160; color: #fff; }
.share-btn.weibo:hover { background: #E6162D; border-color: #E6162D; color: #fff; }
.share-btn.douyin:hover { background: #010101; border-color: #69C9D0; color: #69C9D0; }
.share-btn.bilibili:hover { background: #00A1D6; border-color: #00A1D6; color: #fff; }

/* ===================================================
   页脚
   =================================================== */
.site-footer {
  background: #0A0A15;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.footer-brand .logo-wrap { margin-bottom: 16px; }

.footer-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-socials {
  display: flex;
  gap: 10px;
}

.social-icon {
  width: 36px;
  height: 36px;
  background: var(--bg-card2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
  cursor: pointer;
}
.social-icon:hover { background: var(--brand-red); color: #fff; }

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.footer-links { display: flex; flex-direction: column; gap: 10px; }

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--brand-gold); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 20px;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom-links { display: flex; gap: 16px; }
.footer-bottom-links a { color: var(--text-muted); font-size: 0.82rem; }
.footer-bottom-links a:hover { color: var(--brand-gold); }

.footer-logo-bottom {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.footer-logo-bottom img { width: 36px; height: 36px; }

/* ===================================================
   统计数字条
   =================================================== */
.stats-bar {
  background: linear-gradient(135deg, var(--brand-dark), var(--bg-card));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 30px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item h3 {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand-gold), var(--brand-gold2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.stat-item p { font-size: 0.85rem; color: var(--text-muted); }

/* ===================================================
   AI 功能卡片
   =================================================== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ai-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-red), var(--brand-gold));
}

.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--brand-gold); }

.ai-icon {
  width: 52px;
  height: 52px;
  background: rgba(139,26,47,0.2);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.ai-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.ai-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }

/* ===================================================
   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);
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}

.live-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.live-thumb {
  position: relative;
  aspect-ratio: 3/4;
  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: 10px;
  left: 10px;
  background: #E53935;
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
}

.live-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.live-viewers {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 10px;
}

.live-info { padding: 12px; }
.live-name { font-size: 0.9rem; font-weight: 600; margin-bottom: 4px; }
.live-tag { font-size: 0.78rem; color: var(--brand-gold); }

/* ===================================================
   页面内页样式
   =================================================== */
.page-hero {
  background: linear-gradient(135deg, var(--brand-dark) 0%, var(--bg-dark) 60%);
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.page-hero h1 span { color: var(--brand-gold); }

.page-hero p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.8;
}

.page-content { padding: 50px 0; }

.content-block {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  margin-bottom: 24px;
}

.content-block h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-main);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.content-block h3 { font-size: 1.1rem; font-weight: 600; margin: 16px 0 8px; color: var(--brand-gold); }

.content-block p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.9; margin-bottom: 12px; }

/* ===================================================
   响应式
   =================================================== */
@media (max-width: 1100px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .live-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(15,15,26,0.98);
    padding: 16px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .hero-slider { height: 380px; }
  .hero-content { padding: 0 24px; }
  .hero-content h1 { font-size: 1.8rem; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .live-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 40px 0; }
  .section-title { font-size: 1.4rem; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .live-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .reviews-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-btns { flex-direction: column; }
  .hero-content h1 { font-size: 1.5rem; }
  .search-tags { display: none; }
}

/* ===================================================
   动画
   =================================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in { animation: fadeInUp 0.6s ease forwards; }

/* 懒加载占位 */
img[data-src] { background: var(--bg-card2); min-height: 100px; }

/* 视频占位背景色 */
.video-thumb-placeholder {
  background: linear-gradient(135deg, #1a1a35, #2a1a2e);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}