:root {
  --primary-color: #FFD700;
  --secondary-color: #8B0000;
  --text-color-dark-bg: #ffffff;
  --text-color-light-bg: #333333;
  --card-bg-dark-mode: rgba(255, 255, 255, 0.1);
  --card-bg-light-mode: #ffffff;
  --border-color: #e0e0e0;
}

/* Base styles for the page content, considering dark body background */
.page-index {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--text-color-dark-bg); /* Default text color for dark body background */
  background-color: transparent; /* Main content background will be handled by sections */
}

.page-index__dark-bg {
  background-color: #121212; /* Matches body background for seamless look */
  color: var(--text-color-dark-bg);
}

.page-index__light-bg {
  background-color: var(--card-bg-light-mode);
  color: var(--text-color-light-bg);
}

/* Common container styles */
.page-index__video-container,
.page-index__title-container,
.page-index__brand-container,
.page-index__faq-container,
.page-index__blog-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  box-sizing: border-box;
}

/* 🚨 桌面端视频区域样式（必须严格遵守） */
.page-index__video-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  /* 🚨 顶部间距以公用片段约定为准，使用 var(--header-offset)，避免被固定页头盖住 */
  padding-top: var(--header-offset, 120px);
  background-color: #0a0a0a; /* Slightly darker than body for visual depth */
}

.page-index__video-container {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0; /* Override common container padding */
}

/* 🚨 视频点击链接样式（必须严格遵守） */
.page-index__video-link {
  display: block;
  text-decoration: none;
  position: relative;
  width: 100%;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-index__video-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-index__video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 宽高比 - 🚨 PageSpeed优化：固定宽高比避免布局偏移（CLS） */
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.page-index__video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 8px;
  object-fit: cover;
  pointer-events: none; /* 防止视频控件阻止点击事件 */
}

/* 🚨 视频点击提示遮罩层样式（可选，增强用户体验） */
.page-index__video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
}

.page-index__video-link:hover .page-index__video-overlay {
  opacity: 1;
}

.page-index__video-click-hint {
  color: #ffffff;
  font-size: 18px;
  font-weight: bold;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  padding: 10px 20px;
  background: rgba(var(--primary-color), 0.8);
  border-radius: 5px;
  white-space: nowrap;
}

/* 🚨 Play Now按钮样式（必须严格遵守，位于视频下方中间位置） */
.page-index__video-cta {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 30px;
}

.page-index__play-now-button {
  display: inline-block;
  padding: 15px 40px;
  background: var(--primary-color);
  color: #ffffff;
  text-decoration: none;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.page-index__play-now-button:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.page-index__play-now-button:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Module 1: H1 Title + CTA Buttons */
.page-index__title-section {
  text-align: center;
  padding: 60px 20px;
  background-color: #1a1a1a; /* Dark background */
  color: var(--text-color-dark-bg);
}

.page-index__main-title {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-color);
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-index__title-description {
  font-size: 20px;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: rgba(255, 255, 255, 0.85);
}

.page-index__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

.page-index__cta-button {
  display: inline-block;
  padding: 16px 35px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.page-index__btn-primary {
  background-color: var(--primary-color);
  color: #ffffff;
}

.page-index__btn-primary:hover {
  background-color: #e6b800; /* Slightly darker gold */
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-index__btn-secondary {
  background-color: var(--secondary-color);
  color: #ffffff;
}

.page-index__btn-secondary:hover {
  background-color: #6b0000; /* Slightly darker red */
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* Module 3: Brand Introduction */
.page-index__brand-section {
  padding: 80px 20px;
  background-color: #121212;
  color: var(--text-color-dark-bg);
  text-align: center;
}

.page-index__brand-title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 50px;
  color: var(--primary-color);
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
}

.page-index__brand-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-index__brand-item {
  background-color: var(--card-bg-dark-mode);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-index__brand-item-title {
  font-size: 24px;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 15px;
  color: var(--primary-color);
}

.page-index__brand-item-description,
.page-index__brand-features {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
}

.page-index__brand-features {
  list-style-type: disc;
  margin-left: 20px;
  padding-left: 0;
}

.page-index__brand-features li {
  margin-bottom: 10px;
}

.page-index__brand-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 15px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Module 2: FAQ Common Questions */
.page-index__faq-section {
  padding: 80px 20px;
  background-color: var(--card-bg-light-mode);
  color: var(--text-color-light-bg);
}

.page-index__faq-main-title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 50px;
  text-align: center;
  color: var(--secondary-color);
}

.page-index__faq-list {
  max-width: 900px;
  margin: 0 auto;
}

/* FAQ容器样式 */
.page-index__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background-color: var(--card-bg-light-mode);
}

/* FAQ默认状态 - 答案隐藏 */
.page-index__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
  padding: 0 15px;
  opacity: 0;
  color: var(--text-color-light-bg);
}

/* FAQ展开状态 - 🚨 使用!important和足够大的max-height确保一定能展开 */
.page-index__faq-item.active .page-index__faq-answer {
  max-height: 2000px !important; /* 🚨 使用!important确保优先级，值足够大以容纳任何内容 */
  padding: 20px 15px !important;
  opacity: 1;
  background: #f9f9f9;
  border-radius: 0 0 5px 5px;
}

/* 问题样式 */
.page-index__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: #fff;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
  color: var(--text-color-light-bg);
}

.page-index__faq-item.active .page-index__faq-question {
  border-bottom: none; /* Remove bottom border when active to merge with answer */
}

.page-index__faq-question:hover {
  background: #f5f5f5;
  border-color: #d0d0d0;
}

.page-index__faq-question:active {
  background: #eeeeee;
}

/* 问题标题样式 */
.page-index__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  pointer-events: none; /* 防止h3标签阻止点击事件 */
}

/* 切换图标 */
.page-index__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  line-height: 1;
  color: var(--secondary-color);
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
  margin-left: 15px;
  pointer-events: none; /* 防止图标阻止点击事件 */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.page-index__faq-item.active .page-index__faq-toggle {
  color: var(--primary-color);
  transform: rotate(45deg); /* Change to X or minus */
}

/* Module 4: Blog List Display */
.page-index__blog-section {
  padding: 80px 20px;
  background-color: #0a0a0a;
  color: var(--text-color-dark-bg);
  text-align: center;
}

.page-index__blog-title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 50px;
  color: var(--primary-color);
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
}

.page-index__blog-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-index__blog-item {
  background-color: var(--card-bg-dark-mode);
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-index__blog-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.page-index__blog-link {
  text-decoration: none;
  color: inherit;
  display: block;
  padding-bottom: 20px; /* Padding for content below image */
}

.page-index__blog-item-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 15px;
}

.page-index__blog-item-title {
  font-size: 22px;
  font-weight: 600;
  margin: 0 20px 10px;
  color: var(--primary-color);
  line-height: 1.3;
}

.page-index__blog-item-excerpt {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
  margin: 0 20px 15px;
}

.page-index__blog-item-date {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0 20px;
  display: block;
}

.page-index__view-all-button-wrapper {
    margin-top: 50px;
    text-align: center;
}

/* 🚨 移动端响应式设计（必须严格遵守） */
@media (max-width: 768px) {
  /* Global content padding for mobile */
  .page-index__video-section,
  .page-index__title-section,
  .page-index__brand-section,
  .page-index__faq-section,
  .page-index__blog-section {
    padding: 30px 15px !important;
    /* 🚨 移动端必须确保不超出容器 */
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }
  
  .page-index__video-section {
    /* 移动端 --header-offset 由 shared 在 media 中定义，此处沿用变量即可 */
    padding-top: var(--header-offset, 120px) !important;
  }

  .page-index__video-container,
  .page-index__title-container,
  .page-index__brand-container,
  .page-index__faq-container,
  .page-index__blog-container {
    padding: 0 0 !important; /* Remove inner padding to allow sections to control */
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }
  
  /* 🚨 视频链接移动端适配（必须严格遵守） */
  .page-index__video-link {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  
  .page-index__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    border-radius: 4px;
    overflow: hidden !important;
  }
  
  .page-index__video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    border-radius: 4px;
    object-fit: contain; /* 移动端使用contain确保视频完整显示且不超出 */
  }
  
  /* 🚨 Play Now按钮移动端响应式适配（必须严格遵守） */
  .page-index__video-cta {
    margin-top: 20px;
    padding: 0 15px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
  
  .page-index__play-now-button {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 30px !important;
    font-size: 16px !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-index__video-click-hint {
    font-size: 14px !important;
    padding: 8px 16px !important;
  }

  .page-index__main-title {
    font-size: 32px;
  }

  .page-index__title-description {
    font-size: 16px;
    margin-bottom: 20px;
  }

  .page-index__cta-buttons {
    flex-direction: column;
    gap: 15px;
    padding: 0 15px;
  }

  /* 🚨 按钮移动端适配 */
  .page-index__cta-button {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding: 12px 25px !important;
    font-size: 16px !important;
  }

  .page-index__brand-title,
  .page-index__faq-main-title,
  .page-index__blog-title {
    font-size: 32px;
    margin-bottom: 30px;
  }

  .page-index__brand-content,
  .page-index__blog-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-index__brand-item {
    padding: 20px;
  }

  .page-index__brand-item-title {
    font-size: 20px;
    margin-top: 15px;
  }

  .page-index__brand-item-description,
  .page-index__brand-features {
    font-size: 15px;
  }

  /* FAQ mobile */
  .page-index__faq-question {
    padding: 15px;
    flex-wrap: wrap;
  }
  
  .page-index__faq-question h3 {
    font-size: 15px;
    margin-bottom: 0;
    width: calc(100% - 40px);
  }
  
  .page-index__faq-toggle {
    margin-left: 10px;
    width: 24px;
    height: 24px;
    font-size: 20px;
  }
  
  .page-index__faq-answer {
    padding: 0 15px;
  }
  
  .page-index__faq-item.active .page-index__faq-answer {
    padding: 15px !important;
  }

  /* Blog mobile */
  .page-index__blog-item-image {
    height: 180px;
  }

  .page-index__blog-item-title {
    font-size: 18px;
    margin: 0 15px 8px;
  }

  .page-index__blog-item-excerpt {
    font-size: 14px;
    margin: 0 15px 10px;
  }

  .page-index__blog-item-date {
    font-size: 13px;
    margin: 0 15px;
  }

  /* 🚨 移动端所有图片适配 */
  .page-index img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  
  /* 🚨 移动端所有包含图片的容器适配 */
  .page-index__brand-item,
  .page-index__blog-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 0;
    padding-right: 0;
  }
}