/* ============================================================
   XVIDEO - 卓越影视娱乐 | 主样式表
   Brand: XVIDEO | Domain: atvutv.cn
   ============================================================ */

/* ---- CSS变量 ---- */
:root {
  --xv-red:        #c0392b;
  --xv-red-dark:   #96281b;
  --xv-red-light:  #e74c3c;
  --xv-red-glow:   rgba(192,57,43,0.35);
  --xv-dark1:      #0d0d0d;
  --xv-dark2:      #141414;
  --xv-dark3:      #1e1e1e;
  --xv-dark4:      #2a2a2a;
  --xv-gray:       #888;
  --xv-gray-light: #bbb;
  --xv-white:      #f5f5f5;
  --xv-gold:       #f0c040;
  --font-main:     'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --radius:        8px;
  --radius-lg:     14px;
  --shadow:        0 4px 20px rgba(0,0,0,0.5);
  --shadow-red:    0 4px 20px rgba(192,57,43,0.4);
  --transition:    0.25s ease;
}

/* ---- Reset & Base ---- */
*, *::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(--xv-dark1);
  color: var(--xv-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--xv-red-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--font-main); border: none; background: none; }
input, select, textarea { font-family: var(--font-main); }

/* ---- 滚动动画 ---- */
.video-card, .feature-card, .expert-card, .ai-card, .review-card {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.js-loaded .video-card,
.js-loaded .feature-card,
.js-loaded .expert-card,
.js-loaded .ai-card,
.js-loaded .review-card {
  opacity: 1;
  transform: none;
}
.animate-in { opacity: 1 !important; transform: none !important; }

/* ---- 布局 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.text-center { text-align: center; }
.mt-1 { margin-top: 12px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 32px; }
.text-red { color: var(--xv-red-light); }

/* ---- 标题 ---- */
.section-title {
  font-size: 2rem;
  font-weight: 900;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.section-title span { color: var(--xv-red-light); }
.section-subtitle {
  text-align: center;
  color: var(--xv-gray);
  font-size: 0.95rem;
  margin-bottom: 40px;
  line-height: 1.6;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 700;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--xv-red);
  color: #fff;
  border: 2px solid var(--xv-red);
}
.btn-primary:hover {
  background: var(--xv-red-light);
  border-color: var(--xv-red-light);
  color: #fff;
  box-shadow: var(--shadow-red);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  border-color: var(--xv-red-light);
  color: var(--xv-red-light);
  transform: translateY(-2px);
}
.btn-sm { padding: 7px 16px; font-size: 0.82rem; }

/* ---- 徽章 ---- */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.badge-gold { background: var(--xv-gold); color: #000; }
.badge-red  { background: var(--xv-red); color: #fff; }
.badge-new  { background: #27ae60; color: #fff; }
.badge-dark { background: var(--xv-dark4); color: var(--xv-gray-light); border: 1px solid rgba(255,255,255,0.15); }

/* ============================================================
   HEADER
   ============================================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,13,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(192,57,43,0.25);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: contain;
  background: var(--xv-dark3);
}
.logo-text {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -1px;
  color: #fff;
}
.logo-text span { color: var(--xv-red-light); }

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: rgba(255,255,255,0.75);
  transition: all var(--transition);
  white-space: nowrap;
}
.main-nav a:hover,
.main-nav a.active {
  color: #fff;
  background: rgba(192,57,43,0.2);
}
.main-nav a.active { color: var(--xv-red-light); }

/* 头部搜索 */
.header-search {
  display: flex;
  align-items: center;
  background: var(--xv-dark3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.header-search:focus-within { border-color: var(--xv-red); }
.header-search input {
  background: none;
  border: none;
  outline: none;
  padding: 7px 14px;
  color: #fff;
  font-size: 0.82rem;
  width: 200px;
}
.header-search input::placeholder { color: var(--xv-gray); }
.header-search button {
  background: var(--xv-red);
  border: none;
  padding: 7px 14px;
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition);
}
.header-search button:hover { background: var(--xv-red-light); }

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   搜索栏
   ============================================================ */
.search-bar-section {
  background: var(--xv-dark2);
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.search-bar-inner { display: flex; justify-content: center; margin-bottom: 10px; }
.search-bar-main {
  display: flex;
  width: 100%;
  max-width: 700px;
  background: var(--xv-dark3);
  border: 2px solid rgba(192,57,43,0.4);
  border-radius: 28px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.search-bar-main:focus-within { border-color: var(--xv-red); }
.search-bar-main input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 12px 20px;
  color: #fff;
  font-size: 0.95rem;
}
.search-bar-main input::placeholder { color: var(--xv-gray); }
.search-bar-main button {
  background: var(--xv-red);
  border: none;
  padding: 12px 24px;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition);
  white-space: nowrap;
}
.search-bar-main button:hover { background: var(--xv-red-light); }
.search-hot-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  font-size: 0.82rem;
  color: var(--xv-gray);
}
.search-hot-tags a {
  color: rgba(255,255,255,0.6);
  padding: 3px 10px;
  background: var(--xv-dark3);
  border-radius: 12px;
  transition: all var(--transition);
  font-size: 0.8rem;
}
.search-hot-tags a:hover { background: var(--xv-red); color: #fff; }

/* ============================================================
   HERO
   ============================================================ */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero-section:hover .hero-bg { transform: scale(1); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,13,0.92) 0%, rgba(13,13,13,0.7) 60%, rgba(192,57,43,0.15) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  padding: 60px 0;
}
.hero-badge {
  display: inline-block;
  background: rgba(192,57,43,0.2);
  border: 1px solid rgba(192,57,43,0.5);
  color: var(--xv-red-light);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero-title .brand { color: var(--xv-red-light); }
.hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 560px;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}
.hero-stat-item .num {
  display: block;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--xv-red-light);
}
.hero-stat-item .label {
  font-size: 0.78rem;
  color: var(--xv-gray);
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ============================================================
   统计横幅
   ============================================================ */
.stats-banner {
  background: linear-gradient(135deg, var(--xv-red-dark), var(--xv-red));
  padding: 28px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-item .num {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-item .label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.75);
}

/* ============================================================
   视频卡片
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }

.video-card {
  background: var(--xv-dark2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-red);
  border-color: rgba(192,57,43,0.4);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--xv-dark3);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }

/* 播放按钮 */
.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(0,0,0,0.45); }
.play-icon {
  width: 52px;
  height: 52px;
  background: var(--xv-red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(192,57,43,0.6);
}
.play-icon svg {
  width: 22px;
  height: 22px;
  fill: #fff;
  margin-left: 3px;
}
.video-card:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}
.play-big {
  font-size: 4rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: 16px;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.5));
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: rgba(255,255,255,0.9);
  transition: color var(--transition);
}
.video-card:hover .video-title { color: var(--xv-red-light); }
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--xv-gray);
}
.video-meta .views, .video-meta .likes { display: flex; align-items: center; gap: 4px; }

/* ============================================================
   功能特性卡片
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--xv-dark3);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: rgba(192,57,43,0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-red);
}
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}
.feature-title {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #fff;
}
.feature-desc {
  font-size: 0.875rem;
  color: var(--xv-gray);
  line-height: 1.6;
}

/* ============================================================
   AI卡片
   ============================================================ */
.ai-section {
  background: linear-gradient(135deg, var(--xv-dark1) 0%, rgba(192,57,43,0.08) 100%);
}
.ai-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ai-card {
  background: var(--xv-dark3);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid rgba(192,57,43,0.2);
  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(--xv-red), var(--xv-red-light));
}
.ai-card:hover {
  border-color: rgba(192,57,43,0.5);
  transform: translateY(-4px);
  box-shadow: var(--shadow-red);
}
.ai-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(192,57,43,0.25);
  line-height: 1;
  margin-bottom: 16px;
}
.ai-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}
.ai-desc {
  font-size: 0.875rem;
  color: var(--xv-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}
.ai-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.ai-tag {
  font-size: 0.75rem;
  padding: 3px 10px;
  background: rgba(192,57,43,0.15);
  border: 1px solid rgba(192,57,43,0.3);
  border-radius: 12px;
  color: var(--xv-red-light);
}

/* ============================================================
   专家卡片
   ============================================================ */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.expert-card {
  background: var(--xv-dark3);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}
.expert-card:hover {
  border-color: rgba(192,57,43,0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-red);
}
.expert-photo {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
  object-position: top;
}
.expert-info { padding: 20px; }
.expert-name {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 4px;
}
.expert-title {
  font-size: 0.8rem;
  color: var(--xv-red-light);
  margin-bottom: 10px;
  font-weight: 600;
}
.expert-desc {
  font-size: 0.82rem;
  color: var(--xv-gray);
  line-height: 1.6;
  margin-bottom: 12px;
}
.expert-awards { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.expert-social {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}
.expert-social a {
  width: 30px;
  height: 30px;
  background: var(--xv-dark4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  transition: all var(--transition);
}
.expert-social a:hover { background: var(--xv-red); color: #fff; }
.expert-btns { display: flex; gap: 8px; }

/* ============================================================
   合作伙伴
   ============================================================ */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.partner-item {
  padding: 10px 24px;
  background: var(--xv-dark3);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(255,255,255,0.65);
  transition: all var(--transition);
}
.partner-item:hover {
  border-color: var(--xv-red);
  color: #fff;
  background: rgba(192,57,43,0.1);
}

/* ============================================================
   步骤卡片
   ============================================================ */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step-card {
  background: var(--xv-dark3);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
  position: relative;
}
.step-card:hover {
  border-color: rgba(192,57,43,0.4);
  transform: translateY(-4px);
}
.step-num {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--xv-red-dark), var(--xv-red));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 900;
  color: #fff;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(192,57,43,0.4);
}
.step-title {
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 10px;
}
.step-desc {
  font-size: 0.82rem;
  color: var(--xv-gray);
  line-height: 1.6;
}

/* ============================================================
   用户评价
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--xv-dark3);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}
.review-card:hover {
  border-color: rgba(192,57,43,0.3);
  transform: translateY(-3px);
}
.review-stars {
  color: var(--xv-gold);
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.review-text {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  margin-bottom: 16px;
}
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--xv-red-dark), var(--xv-red));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}
.review-author-info .name { font-size: 0.88rem; font-weight: 700; }
.review-author-info .date { font-size: 0.75rem; color: var(--xv-gray); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--xv-dark3);
  border-radius: var(--radius);
  margin-bottom: 10px;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: rgba(192,57,43,0.4); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: color var(--transition);
  gap: 12px;
}
.faq-question:hover { color: var(--xv-red-light); }
.faq-icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--xv-red);
  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 0.35s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner {
  padding: 0 20px 18px;
  font-size: 0.875rem;
  color: var(--xv-gray);
  line-height: 1.7;
}

/* ============================================================
   联系信息
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info-list { display: flex; flex-direction: column; gap: 16px; }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.contact-info-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  margin-top: 2px;
}
.contact-info-label {
  font-size: 0.78rem;
  color: var(--xv-gray);
  margin-bottom: 2px;
}
.contact-info-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
}

/* ============================================================
   二维码
   ============================================================ */
.qr-group { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-code {
  width: 90px;
  height: 90px;
  background: #fff;
  border-radius: 8px;
  padding: 6px;
  margin-bottom: 6px;
}
.qr-code svg { width: 100%; height: 100%; }
.qr-label { font-size: 0.75rem; color: var(--xv-gray); }

/* ============================================================
   分享按钮
   ============================================================ */
.share-bar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.share-label { font-size: 0.82rem; color: var(--xv-gray); }
.share-btn {
  padding: 5px 12px;
  border-radius: 14px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.7);
  transition: all var(--transition);
  cursor: pointer;
}
.share-btn:hover { background: var(--xv-red); border-color: var(--xv-red); color: #fff; }

/* ============================================================
   页面Banner
   ============================================================ */
.page-banner {
  background: linear-gradient(135deg, var(--xv-dark2), rgba(192,57,43,0.12));
  padding: 48px 0;
  border-bottom: 1px solid rgba(192,57,43,0.2);
}
.page-banner h1 {
  font-size: 2.2rem;
  font-weight: 900;
  margin: 12px 0 8px;
}
.page-banner h1 span { color: var(--xv-red-light); }
.page-banner p { color: var(--xv-gray); font-size: 0.95rem; }

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--xv-gray);
}
.breadcrumb a:hover { color: var(--xv-red-light); }
.breadcrumb .sep { color: rgba(255,255,255,0.2); }
.breadcrumb .current { color: var(--xv-red-light); }

/* ============================================================
   侧边栏布局
   ============================================================ */
.layout-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
.sidebar-widget {
  background: var(--xv-dark3);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  border: 1px solid rgba(255,255,255,0.06);
}
.widget-title {
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--xv-red);
  color: #fff;
}
.rank-list { display: flex; flex-direction: column; gap: 10px; }
.rank-item { display: flex; align-items: center; gap: 10px; }
.rank-num {
  width: 24px;
  height: 24px;
  background: var(--xv-dark4);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
  color: var(--xv-gray);
}
.rank-num.top1 { background: var(--xv-gold); color: #000; }
.rank-num.top2 { background: #aaa; color: #000; }
.rank-num.top3 { background: #cd7f32; color: #fff; }
.rank-title { font-size: 0.82rem; font-weight: 600; margin-bottom: 2px; }
.rank-views { font-size: 0.72rem; color: var(--xv-gray); }

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  width: 38px;
  height: 38px;
  background: var(--xv-dark3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  color: rgba(255,255,255,0.7);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--xv-red);
  border-color: var(--xv-red);
  color: #fff;
}

/* ============================================================
   分类标签
   ============================================================ */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.cat-tab {
  padding: 7px 16px;
  background: var(--xv-dark3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 20px;
  color: rgba(255,255,255,0.65);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.cat-tab:hover, .cat-tab.active {
  background: var(--xv-red);
  border-color: var(--xv-red);
  color: #fff;
}

/* ============================================================
   视频弹窗
   ============================================================ */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 9000;
  align-items: center;
  justify-content: center;
}
.video-modal.open { display: flex; }
.video-modal-inner {
  position: relative;
  width: 90%;
  max-width: 760px;
  background: var(--xv-dark2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(192,57,43,0.3);
  box-shadow: 0 20px 60px rgba(0,0,0,0.8);
}
.video-modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  background: rgba(0,0,0,0.6);
  border: none;
  color: #fff;
  font-size: 1.1rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 10;
  transition: background var(--transition);
}
.video-modal-close:hover { background: var(--xv-red); }
.video-modal-placeholder {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #0d0d0d, #1a0505);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

/* ============================================================
   FOOTER
   ============================================================ */
#site-footer {
  background: var(--xv-dark2);
  border-top: 1px solid rgba(192,57,43,0.25);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .logo-wrap img { width: 36px; height: 36px; border-radius: 6px; }
.footer-brand .brand-name {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}
.footer-brand .brand-name span { color: var(--xv-red-light); }
.footer-desc {
  font-size: 0.82rem;
  color: var(--xv-gray);
  line-height: 1.7;
  margin-bottom: 20px;
}
.footer-heading {
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(192,57,43,0.3);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  font-size: 0.82rem;
  color: var(--xv-gray);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--xv-red-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--xv-gray);
}
.footer-bottom a { color: var(--xv-gray); }
.footer-bottom a:hover { color: var(--xv-red-light); }
.footer-legal { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============================================================
   响应式设计
   ============================================================ */
@media (max-width: 1100px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .section { padding: 52px 0; }
  .section-title { font-size: 1.6rem; }
  .hero-section { min-height: 460px; }
  .hero-title { font-size: 2rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid, .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-cards { grid-template-columns: 1fr 1fr; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .layout-sidebar { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .header-search { display: none; }
  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--xv-dark2);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid rgba(192,57,43,0.3);
    z-index: 999;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; border-radius: 8px; font-size: 0.95rem; }
  .menu-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}

@media (max-width: 600px) {
  .section { padding: 40px 0; }
  .section-title { font-size: 1.4rem; }
  .hero-title { font-size: 1.7rem; }
  .hero-stats { gap: 20px; }
  .hero-stat-item .num { font-size: 1.3rem; }
  .video-grid, .video-grid-3, .video-grid-4 { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .feature-grid { grid-template-columns: 1fr; }
  .ai-cards { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .page-banner h1 { font-size: 1.6rem; }
}

@media (max-width: 400px) {
  .video-grid, .video-grid-3, .video-grid-4 { grid-template-columns: 1fr; }
}