/* style/index.css */
:root {
    --primary-color: #FFD700; /* Vàng kim */
    --secondary-color: #000080; /* Xanh đậm */
    --text-light: #ffffff;
    --text-dark: #333333;
    --bg-dark: #121212; /* Body background */
    --bg-light-card: rgba(255, 255, 255, 0.1);
    --border-color: #e0e0e0;
}

.page-index {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
}

/* 🚨 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;
  padding-top: 10px; /* 桌面端：根据导航栏实际高度调整 */
  background-color: var(--bg-dark);
}

.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;
}

/* 🚨 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 trải nghiệm） */
.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: var(--text-light);
  font-size: 18px;
  font-weight: bold;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
  padding: 10px 20px;
  background: var(--primary-color);
  border-radius: 5px;
  white-space: nowrap;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* 🚨 Play Now按钮样式（必须严格遵守，位于 video下方 giữa vị trí） */
.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: var(--text-dark);
  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;
}

.page-index__play-now-button:hover {
  background: #e6c200; /* Darker shade of primary 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);
}

/* Title Section */
.page-index__title-section {
    padding: 80px 20px;
    text-align: center;
    background-color: var(--bg-dark);
    color: var(--text-light);
}

.page-index__title-container {
    max-width: 900px;
    margin: 0 auto;
}

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

.page-index__title-description {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 40px;
    color: #f0f0f0;
}

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

.page-index__cta-button {
    display: inline-block;
    padding: 15px 35px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
}

.page-index__cta-button--primary {
    background-color: var(--primary-color);
    color: var(--text-dark);
}

.page-index__cta-button--primary:hover {
    background-color: #e6c200;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.page-index__cta-button--secondary {
    background-color: var(--secondary-color);
    color: var(--text-light);
    border: 2px solid var(--primary-color);
}

.page-index__cta-button--secondary:hover {
    background-color: #000066;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* Features Section */
.page-index__features-section {
    padding: 80px 20px;
    background-color: var(--secondary-color);
    color: var(--text-light);
    text-align: center;
}

.page-index__features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.page-index__features-title {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.page-index__features-description {
    font-size: 18px;
    margin-bottom: 50px;
    color: #f0f0f0;
}

.page-index__features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.page-index__feature-item {
    background-color: rgba(255, 255, 255, 0.08); /* Light transparent background */
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    height: 100%;
}

.page-index__feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-index__feature-icon {
    width: 120px; /* Min size 200px is for content display images, icons can be smaller */
    height: 120px; /* Adjusted to 120x120 for icon-like feature images, still larger than small icons */
    margin-bottom: 20px;
    object-fit: contain;
    filter: drop-shadow(0 0 5px var(--primary-color)); /* Safe filter for visual effect, not color change */
}

.page-index__feature-heading {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.page-index__feature-text {
    font-size: 16px;
    color: #cccccc;
}

/* FAQ Section */
.page-index__faq-section {
    padding: 80px 20px;
    background-color: var(--bg-dark);
    color: var(--text-light);
}

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

.page-index__faq-main-title {
    font-size: 36px;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.page-index__faq-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* FAQ容器样式 */
.page-index__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 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 20px;
  opacity: 0;
  background: rgba(255, 255, 255, 0.05);
  color: #cccccc;
}

/* 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; /* 🚨 Sử dụng!important để đảm bảo độ ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
  padding: 20px !important;
  opacity: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 问题样式 */
.page-index__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: var(--bg-light-card);
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-index__faq-question:hover {
  background: rgba(255, 255, 255, 0.15);
}

.page-index__faq-question:active {
  background: rgba(255, 255, 255, 0.2);
}

/* 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;
  color: var(--primary-color);
  pointer-events: none; /* 防止h3标签阻止点击事件 */
}

/* 切换图标 */
.page-index__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  line-height: 1;
  color: var(--primary-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: 30px;
  height: 30px;
}

.page-index__faq-item.active .page-index__faq-toggle {
  transform: rotate(45deg); /* Rotate for 'x' effect, or simply change content */
  color: var(--text-light);
}

/* Brand Section */
.page-index__brand-section {
    padding: 80px 20px;
    background-color: var(--secondary-color);
    color: var(--text-light);
    text-align: center;
}

.page-index__brand-container {
    max-width: 1200px;
    margin: 0 auto;
}

.page-index__brand-title {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 40px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

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

.page-index__brand-item {
    background-color: rgba(255, 255, 255, 0.08);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    text-align: left;
    height: 100%;
}

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

.page-index__brand-item p {
    font-size: 16px;
    color: #cccccc;
}

/* Blog Section */
.page-index__blog-section {
    padding: 80px 20px;
    background-color: var(--bg-dark);
    color: var(--text-light);
    text-align: center;
}

.page-index__blog-container {
    max-width: 1200px;
    margin: 0 auto;
}

.page-index__blog-title {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.page-index__blog-description {
    font-size: 18px;
    margin-bottom: 50px;
    color: #f0f0f0;
}

.page-index__blog-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.page-index__blog-item {
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.page-index__blog-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-index__blog-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.page-index__blog-item-image {
    width: 100%;
    height: 200px; /* Ensure images are not small icons */
    object-fit: cover;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.page-index__blog-item-content {
    padding: 20px;
    text-align: left;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.page-index__blog-item-title {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 10px;
    line-height: 1.4;
}

.page-index__blog-item-excerpt {
    font-size: 15px;
    color: #cccccc;
    margin-bottom: 15px;
    flex-grow: 1;
}

.page-index__blog-item-date {
    font-size: 14px;
    color: #888888;
    text-align: right;
}

.page-index__blog-cta {
    margin-top: 20px;
}

/* 🚨 移动端响应式设计（必须严格遵守） */
@media (max-width: 768px) {
  .page-index {
    font-size: 16px;
    line-height: 1.6;
    padding-left: 0;
    padding-right: 0;
  }

  .page-index__video-section {
    padding-top: 10px !important; /* 移动端：根据移动端导航栏实际高度调整 */
    padding-bottom: 40px;
    padding-left: 15px;
    padding-right: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }
  
  .page-index__video-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 0;
    padding-right: 0;
    overflow: hidden !important;
  }
  
  .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;
  }
  
  .page-index__video-cta {
    margin-top: 20px;
    padding-left: 15px;
    padding-right: 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__title-section,
    .page-index__features-section,
    .page-index__faq-section,
    .page-index__brand-section,
    .page-index__blog-section {
        padding: 40px 15px;
    }

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

    .page-index__title-description,
    .page-index__features-description,
    .page-index__blog-description {
        font-size: 16px;
    }

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

    .page-index__cta-button {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding: 12px 25px;
        font-size: 16px;
    }

    .page-index__features-title,
    .page-index__faq-main-title,
    .page-index__brand-title,
    .page-index__blog-title {
        font-size: 28px;
    }

    .page-index__feature-heading,
    .page-index__brand-item-title {
        font-size: 20px;
    }

    .page-index__feature-icon {
        width: 80px;
        height: 80px;
    }

    .page-index__faq-question {
        padding: 15px;
        flex-wrap: wrap;
    }
    
    .page-index__faq-question h3 {
        font-size: 16px;
        margin-bottom: 0;
        width: calc(100% - 40px);
    }
    
    .page-index__faq-toggle {
        margin-left: 10px;
        width: 24px;
        height: 24px;
        font-size: 22px;
    }
    
    .page-index__faq-answer {
        padding: 0 15px;
    }
    
    .page-index__faq-item.active .page-index__faq-answer {
        padding: 15px !important;
    }

    .page-index__blog-item-image {
        height: 180px;
    }

    .page-index__blog-item-title {
        font-size: 18px;
    }

    .page-index__blog-item-excerpt {
        font-size: 14px;
    }
    /* Global image responsive styles for mobile */
    .page-index img {
        max-width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-index__features-grid,
    .page-index__brand-content,
    .page-index__blog-list {
      grid-template-columns: 1fr;
    }

    .page-index__features-container,
    .page-index__brand-container,
    .page-index__blog-container {
      padding-left: 0;
      padding-right: 0;
    }
    .page-index__feature-item, .page-index__brand-item, .page-index__blog-item {
      margin-left: 15px;
      margin-right: 15px;
    }
}