/* ============================================================
   呦呦视频 官方网站样式表 - 玫瑰金·深酒红原创主题
   域名: 157558.cn | 版权所有 © 2026 呦呦视频
   ============================================================ */

/* ---- CSS 变量 ---- */
:root {
  --primary:       #8B1A2F;   /* 深酒红 */
  --primary-light: #C0394F;   /* 亮酒红 */
  --accent:        #C9956A;   /* 玫瑰金 */
  --accent-light:  #E8C4A0;   /* 浅玫瑰金 */
  --gold:          #D4A853;   /* 金色 */
  --dark:          #1A0A0E;   /* 极深底色 */
  --dark-2:        #2C1018;   /* 次深底色 */
  --dark-3:        #3D1A24;   /* 卡片底色 */
  --text-main:     #F5E8E0;   /* 主文字 */
  --text-sub:      #C4A090;   /* 次文字 */
  --text-muted:    #8A6A60;   /* 弱文字 */
  --border:        rgba(201,149,106,0.2);
  --shadow-sm:     0 2px 12px rgba(139,26,47,0.25);
  --shadow-md:     0 8px 32px rgba(139,26,47,0.35);
  --shadow-lg:     0 20px 60px rgba(0,0,0,0.5);
  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     20px;
  --transition:    0.3s cubic-bezier(0.4,0,0.2,1);
  --font-main:     'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

/* ---- 基础重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--font-main); }

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

/* ============================================================
   导航栏
   ============================================================ */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(26,10,14,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition);
}
.site-nav.scrolled {
  background: rgba(26,10,14,0.98);
  box-shadow: var(--shadow-sm);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}
.nav-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}
.nav-brand span { color: var(--accent); }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-sub);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--accent);
  background: rgba(201,149,106,0.1);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn-nav-login {
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 0.875rem;
  transition: all var(--transition);
}
.btn-nav-login:hover {
  background: var(--accent);
  color: var(--dark);
}
.btn-nav-join {
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 0.875rem;
  transition: all var(--transition);
}
.btn-nav-join:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   Hero Banner
   ============================================================ */
.hero-banner {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 64px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1A0A0E 0%, #2C1018 40%, #3D1A24 70%, #1A0A0E 100%);
}
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(139,26,47,0.3) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(201,149,106,0.15) 0%, transparent 60%);
}
.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  mix-blend-mode: luminosity;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(26,10,14,0.85) 40%, rgba(26,10,14,0.3) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-text .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  background: rgba(201,149,106,0.15);
  border: 1px solid rgba(201,149,106,0.3);
  color: var(--accent);
  font-size: 0.8rem;
  margin-bottom: 20px;
}
.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-main) 0%, var(--accent-light) 50%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-text .subtitle {
  font-size: 1.1rem;
  color: var(--text-sub);
  margin-bottom: 12px;
  line-height: 1.8;
}
.hero-text .desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}
.hero-stat-item { text-align: center; }
.hero-stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(139,26,47,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139,26,47,0.5);
  color: #fff;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--accent);
  font-size: 1rem;
  font-weight: 600;
  border: 1.5px solid var(--accent);
  transition: all var(--transition);
}
.btn-secondary:hover {
  background: rgba(201,149,106,0.1);
  transform: translateY(-2px);
}
.hero-visual {
  position: relative;
}
.hero-video-showcase {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-video-showcase video,
.hero-video-showcase img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  display: block;
}
.hero-video-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,10,14,0.7) 0%, transparent 50%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-play-btn {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(201,149,106,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--dark);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}
.hero-play-btn:hover {
  transform: scale(1.1);
  background: var(--accent);
}
.hero-floating-cards {
  position: absolute;
  bottom: -20px;
  left: 0;
  right: 0;
  display: flex;
  gap: 10px;
  padding: 0 16px;
}
.hero-float-card {
  flex: 1;
  background: rgba(44,16,24,0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  text-align: center;
}
.hero-float-card .num {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}
.hero-float-card .lbl {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ============================================================
   通用区块
   ============================================================ */
.section {
  padding: 80px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.section-full {
  padding: 80px 24px;
  background: var(--dark-2);
}
.section-full .section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(201,149,106,0.12);
  border: 1px solid rgba(201,149,106,0.25);
  color: var(--accent);
  font-size: 0.8rem;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-header h2 span { color: var(--accent); }
.section-header p {
  color: var(--text-sub);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================================
   视频卡片
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--dark-3);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(201,149,106,0.4);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--dark-2);
}
.video-thumb video,
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb video,
.video-card:hover .video-thumb img {
  transform: scale(1.05);
}
.video-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26,10,14,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .video-play-overlay { opacity: 1; }
.video-play-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(201,149,106,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--dark);
  border: none;
  transition: transform var(--transition);
}
.video-card:hover .video-play-btn { transform: scale(1.1); }
.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-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info {
  padding: 14px 16px;
}
.video-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  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: 0.8rem;
  color: var(--text-muted);
}
.video-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(139,26,47,0.3);
  color: var(--accent-light);
  font-size: 0.72rem;
  margin-top: 6px;
}

/* 大视频预览区 */
.video-preview-section {
  padding: 60px 24px;
  background: var(--dark);
}
.video-preview-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.video-preview-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-top: 32px;
}
.video-preview-main {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--dark-2);
}
.video-preview-main video {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}
.video-preview-main .play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,10,14,0.3);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-preview-main:hover .play-overlay { opacity: 1; }
.video-preview-main .play-overlay button {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(201,149,106,0.9);
  border: none;
  font-size: 1.8rem;
  color: var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}
.video-preview-main:hover .play-overlay button { transform: scale(1.1); }
.video-preview-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.video-preview-side-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--dark-2);
  flex: 1;
}
.video-preview-side-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.video-preview-side-item .play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,10,14,0.35);
  opacity: 0;
  transition: opacity var(--transition);
}
.video-preview-side-item:hover .play-overlay { opacity: 1; }
.video-preview-side-item .play-overlay button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(201,149,106,0.9);
  border: none;
  font-size: 1rem;
  color: var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   分类导航
   ============================================================ */
.category-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.category-tab {
  padding: 8px 18px;
  border-radius: 20px;
  background: var(--dark-3);
  border: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
}
.category-tab:hover,
.category-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ============================================================
   专家展示
   ============================================================ */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--dark-3);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.expert-card:hover {
  transform: translateY(-4px);
  border-color: rgba(201,149,106,0.4);
  box-shadow: var(--shadow-sm);
}
.expert-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--accent);
}
.expert-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}
.expert-title {
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.expert-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-top: 12px;
}
.expert-tag {
  padding: 2px 10px;
  border-radius: 12px;
  background: rgba(139,26,47,0.25);
  color: var(--accent-light);
  font-size: 0.72rem;
}

/* ============================================================
   功能模块
   ============================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--dark-3);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: rgba(201,149,106,0.35);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(139,26,47,0.4), rgba(201,149,106,0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================================
   资讯/文章
   ============================================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.news-card {
  background: var(--dark-3);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(201,149,106,0.35);
}
.news-thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-body { padding: 16px 18px; }
.news-cat {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  background: rgba(139,26,47,0.3);
  color: var(--accent-light);
  font-size: 0.72rem;
  margin-bottom: 8px;
}
.news-body h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.5;
}
.news-body p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
  background: var(--dark-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: rgba(201,149,106,0.4); }
.faq-question {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}
.faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(0deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer-inner {
  padding: 0 20px 18px;
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.8;
}

/* ============================================================
   用户评价
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--dark-3);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.review-card:hover {
  border-color: rgba(201,149,106,0.3);
  transform: translateY(-3px);
}
.review-stars {
  color: var(--gold);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.review-text {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
  font-weight: 700;
  flex-shrink: 0;
}
.review-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}
.review-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb-bar {
  background: var(--dark-2);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  margin-top: 64px;
}
.breadcrumb-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb-inner a {
  color: var(--text-muted);
  transition: color var(--transition);
}
.breadcrumb-inner a:hover { color: var(--accent); }
.breadcrumb-inner .sep { color: var(--border); }
.breadcrumb-inner .current { color: var(--accent); }

/* ============================================================
   页面Hero（内页）
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, var(--dark-2) 0%, var(--dark-3) 100%);
  border-bottom: 1px solid var(--border);
  padding: 48px 24px;
  text-align: center;
}
.page-hero-inner {
  max-width: 800px;
  margin: 0 auto;
}
.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.page-hero h1 span { color: var(--accent); }
.page-hero p {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.8;
}

/* ============================================================
   统计数字横幅
   ============================================================ */
.stats-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--dark-3) 100%);
  padding: 48px 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-banner-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item .num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-light);
  display: block;
}
.stat-item .label {
  font-size: 0.875rem;
  color: rgba(245,232,224,0.7);
  margin-top: 4px;
}

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-banner {
  background: linear-gradient(135deg, var(--dark-3) 0%, rgba(139,26,47,0.3) 50%, var(--dark-3) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  margin: 0 24px 80px;
  max-width: 1152px;
  margin-left: auto;
  margin-right: auto;
}
.cta-banner h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.cta-banner p {
  font-size: 1rem;
  color: var(--text-sub);
  margin-bottom: 28px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 60px 24px 24px;
}
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .brand-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}
.footer-brand .brand-logo span {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}
.footer-brand .brand-logo span em {
  color: var(--accent);
  font-style: normal;
}
.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.footer-socials {
  display: flex;
  gap: 10px;
}
.footer-social-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--dark-3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
}
.footer-social-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-bottom a {
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-bottom a:hover { color: var(--accent); }
.footer-update {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-update span { color: var(--accent); }
.footer-logo-img {
  width: 120px;
  opacity: 0.7;
  transition: opacity var(--transition);
}
.footer-logo-img:hover { opacity: 1; }

/* ============================================================
   视频弹窗
   ============================================================ */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.88);
  align-items: center;
  justify-content: center;
}
.video-modal.active { display: flex; }
.video-modal-inner {
  position: relative;
  width: 90%;
  max-width: 860px;
  background: var(--dark-2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.video-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.6);
  border: none;
  color: #fff;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: background var(--transition);
}
.video-modal-close:hover { background: var(--primary); }
.video-modal video {
  width: 100%;
  aspect-ratio: 16/9;
  display: block;
  background: #000;
}

/* ============================================================
   搜索栏
   ============================================================ */
.search-bar {
  display: flex;
  gap: 10px;
  max-width: 560px;
  margin: 0 auto 40px;
}
.search-input {
  flex: 1;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: var(--dark-3);
  border: 1px solid var(--border);
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: var(--font-main);
  outline: none;
  transition: border-color var(--transition);
}
.search-input:focus { border-color: var(--accent); }
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  padding: 12px 22px;
  border-radius: var(--radius-md);
  background: var(--primary);
  border: none;
  color: #fff;
  font-size: 0.95rem;
  transition: all var(--transition);
}
.search-btn:hover { background: var(--primary-light); }

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 40px;
  flex-wrap: wrap;
}
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--dark-3);
  border: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}
.page-btn:hover,
.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ============================================================
   联系表单
   ============================================================ */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--dark-3);
  border: 1px solid var(--border);
  color: var(--text-main);
  font-size: 0.9rem;
  font-family: var(--font-main);
  outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-banner-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-menu, .nav-actions { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(26,10,14,0.98);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
  }
  .nav-menu.open + .nav-actions {
    display: flex;
    position: fixed;
    top: auto;
    padding: 0 24px 20px;
    background: rgba(26,10,14,0.98);
  }
  .hero-stats { gap: 16px; }
  .hero-floating-cards { display: none; }
  .video-preview-grid { grid-template-columns: 1fr; }
  .video-preview-side { flex-direction: row; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-banner-inner { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 48px 16px; }
  .section-full { padding: 48px 16px; }
  .cta-banner { padding: 40px 24px; margin: 0 16px 48px; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .stats-banner-inner { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
  .hero-stats { flex-wrap: wrap; gap: 12px; }
}

/* ============================================================
   干扰标签容器（隐藏，不影响布局）
   ============================================================ */
#distract-wrap {
  display: none !important;
  visibility: hidden !important;
  position: absolute !important;
  width: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
}

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

/* ============================================================
   标签云
   ============================================================ */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.tag-item {
  padding: 5px 14px;
  border-radius: 16px;
  background: var(--dark-3);
  border: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 0.82rem;
  transition: all var(--transition);
  cursor: pointer;
}
.tag-item:hover {
  background: rgba(139,26,47,0.3);
  border-color: var(--primary-light);
  color: var(--accent-light);
}

/* ============================================================
   通知条
   ============================================================ */
.notice-bar {
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 10px 24px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.9);
  position: relative;
  z-index: 999;
}
.notice-bar a { color: var(--accent-light); text-decoration: underline; }

/* ============================================================
   侧边栏（内页用）
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}
.sidebar-widget {
  background: var(--dark-3);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--border);
  margin-bottom: 20px;
}
.sidebar-widget h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
@media (max-width: 900px) {
  .page-layout { grid-template-columns: 1fr; }
}