:root {
  --primary-color: #26A9E0;
  --secondary-color: #FFFFFF;
  --login-color: #EA7C07;
  --background-color-default: #FFFFFF;
  --text-color-dark: #333333;
  --text-color-light: #FFFFFF;
  --card-background: #FFFFFF;
  --border-color: #e0e0e0;
}

.page-download {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color-dark);
  background-color: var(--background-color-default);
}

.page-download__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  padding-top: var(--header-offset, 120px);
  background: linear-gradient(135deg, var(--primary-color), #40c0f5);
  color: var(--text-color-light);
  overflow: hidden;
}

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

.page-download__hero-image {
  width: 100%;
  margin-bottom: 30px;
}

.page-download__hero-image img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.page-download__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
}

.page-download__main-heading {
  font-size: 3.2em;
  margin-bottom: 20px;
  font-weight: bold;
  color: var(--text-color-light);
}

.page-download__intro-text {
  font-size: 1.2em;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-color-light);
}

.page-download__cta-button {
  display: inline-block;
  padding: 15px 40px;
  background: var(--login-color); /* Sử dụng màu login cho CTA */
  color: var(--text-color-light);
  text-decoration: none;
  border-radius: 5px;
  font-size: 1.1em;
  font-weight: bold;
  margin-top: 20px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-download__cta-button:hover {
  background: #f08c1c;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.page-download__section {
  padding: 60px 20px;
  text-align: center;
}

.page-download__container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.page-download__section-title {
  font-size: 2.5em;
  margin-bottom: 20px;
  color: var(--text-color-dark);
  font-weight: bold;
}

.page-download__section-description {
  font-size: 1.1em;
  margin-bottom: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  color: #555;
}

.page-download__dark-section .page-download__section-title,
.page-download__dark-section .page-download__section-description {
  color: var(--text-color-light);
}

.page-download__dark-section {
  background-color: var(--primary-color);
  color: var(--text-color-light);
}

.page-download__light-bg {
  background-color: var(--background-color-default);
  color: var(--text-color-dark);
}

.page-download__feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-download__feature-item {
  background: var(--card-background);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--border-color);
}

.page-download__feature-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-download__feature-item img {
  width: 100%;
  height: 267px; /* Fixed height for image consistency, will be adjusted by object-fit */
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  min-width: 200px; /* Ensure minimum size */
  min-height: 200px;
  display: block;
}

.page-download__feature-title {
  font-size: 1.6em;
  margin-bottom: 15px;
  color: var(--primary-color);
  font-weight: bold;
}

.page-download__feature-text {
  font-size: 1em;
  color: #666;
}

.page-download__platform-guide {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  justify-content: center;
  margin-top: 40px;
}

.page-download__platform-item {
  flex: 1; /* Allow items to grow */
  min-width: 320px; /* Minimum width for each platform guide */
  max-width: 500px;
  background: var(--card-background);
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  border: 1px solid var(--border-color);
  color: var(--text-color-dark);
}

.page-download__platform-item.page-download__dark-bg {
  background: #3a3a3a; /* Slightly darker background for contrast */
  color: var(--text-color-light);
  border-color: #555;
}

.page-download__platform-item.page-download__dark-bg .page-download__platform-title {
  color: var(--primary-color);
}

.page-download__platform-item.page-download__dark-bg .page-download__download-steps li strong {
  color: var(--primary-color);
}

.page-download__platform-title {
  font-size: 2em;
  margin-bottom: 25px;
  color: var(--primary-color);
  font-weight: bold;
}

.page-download__qr-code {
  width: 200px;
  height: 200px;
  object-fit: contain;
  margin-bottom: 25px;
  border: 5px solid var(--text-color-light);
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  min-width: 200px;
  min-height: 200px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.page-download__download-steps {
  list-style-type: none;
  padding: 0;
  text-align: left;
  margin-bottom: 30px;
}

.page-download__download-steps li {
  margin-bottom: 15px;
  font-size: 1.05em;
  color: #444;
  position: relative;
  padding-left: 25px;
}

.page-download__platform-item.page-download__dark-bg .page-download__download-steps li {
  color: #ddd;
}

.page-download__download-steps li::before {
  content: counter(step-counter);
  counter-increment: step-counter;
  background-color: var(--primary-color);
  color: var(--text-color-light);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85em;
  font-weight: bold;
  position: absolute;
  left: 0;
  top: 2px;
}

.page-download__platform-img {
  width: 100%;
  height: auto;
  max-width: 400px;
  margin-top: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  min-width: 200px;
  min-height: 200px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.page-download__app-features {
  background-color: #f9f9f9;
}

.page-download__features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.page-download__feature-card {
  background: var(--card-background);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  text-align: left;
  border: 1px solid var(--border-color);
}

.page-download__feature-card img {
  width: 100%;
   /* Adjust height for consistency */
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 15px;
  min-width: 200px;
  min-height: 200px;
  display: block;
}

.page-download__feature-card-title {
  font-size: 1.4em;
  margin-bottom: 10px;
  color: var(--primary-color);
  font-weight: bold;
}

.page-download__feature-card-text {
  font-size: 0.95em;
  color: #666;
}

.page-download__faq-section {
  background-color: var(--background-color-default);
}

.page-download__faq-list {
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

/* FAQ容器样式 */
.page-download__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
}

/* FAQ默认状态 - 答案隐藏 */
.page-download__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;
  color: #555;
}

/* FAQ展开状态 - 🚨 Sử dụng!important và đủ lớn max-height để đảm bảo có thể mở rộng */
.page-download__faq-item.active .page-download__faq-answer {
  max-height: 2000px !important; /* 🚨 Sử dụng!important để đảm bảo ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
  padding: 20px !important;
  opacity: 1;
  background: #f9f9f9;
  border-radius: 0 0 8px 8px;
}

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

.page-download__faq-question:hover {
  background: #f5f5f5;
}

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

/* Tiêu đề câu hỏi */
.page-download__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 1.15em;
  font-weight: 600;
  line-height: 1.5;
  pointer-events: none; /* Ngăn chặn thẻ h3 chặn sự kiện click */
  color: var(--text-color-dark);
}

/* Biểu tượng chuyển đổi */
.page-download__faq-toggle {
  font-size: 24px;
  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; /* Ngăn chặn biểu tượng chặn sự kiện click */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.page-download__faq-item.active .page-download__faq-toggle {
  color: #333;
  transform: rotate(45deg);
}

.page-download__cta-bottom {
  padding-top: 80px;
  padding-bottom: 80px;
  background: linear-gradient(135deg, var(--primary-color), #40c0f5);
}

.page-download__cta-bottom .page-download__cta-button {
  background: var(--login-color);
}

.page-download__cta-bottom .page-download__cta-button:hover {
  background: #f08c1c;
}

/* 🚨 Mobile Responsive Design */
@media (max-width: 768px) {
  .page-download {
    font-size: 15px;
    line-height: 1.5;
  }

  .page-download__hero-section {
    padding-top: var(--header-offset, 120px) !important;
    padding-bottom: 40px;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-download__main-heading {
    font-size: 2.2em;
  }

  .page-download__intro-text {
    font-size: 1em;
  }

  .page-download__cta-button {
    padding: 12px 30px;
    font-size: 1em;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-download__section {
    padding: 40px 15px;
  }

  .page-download__container {
    padding-left: 0;
    padding-right: 0;
  }

  .page-download__section-title {
    font-size: 2em;
  }

  .page-download__feature-grid,
  .page-download__features-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-download__feature-item,
  .page-download__feature-card {
    padding: 20px;
    text-align: center;
  }

  .page-download__feature-item img,
  .page-download__feature-card img {
    height: auto;
    max-width: 100%;
    min-width: 200px !important;
    min-height: 200px !important;
    margin-left: auto;
    margin-right: auto;
  }

  .page-download__platform-item {
    padding: 30px 20px;
    min-width: unset;
  }

  .page-download__platform-title {
    font-size: 1.6em;
  }

  .page-download__qr-code {
    width: 180px;
    height: 180px;
  }

  .page-download__download-steps li {
    font-size: 0.95em;
    padding-left: 20px;
  }

  .page-download__download-steps li::before {
    width: 20px;
    height: 20px;
    font-size: 0.8em;
  }

  .page-download__faq-question {
    padding: 15px;
    flex-wrap: wrap;
  }
  
  .page-download__faq-question h3 {
    font-size: 1em;
    margin-bottom: 0;
    width: calc(100% - 40px);
  }
  
  .page-download__faq-toggle {
    margin-left: 10px;
    width: 24px;
    height: 24px;
    font-size: 20px;
  }
  
  .page-download__faq-answer {
    padding: 0 15px;
  }
  
  .page-download__faq-item.active .page-download__faq-answer {
    padding: 15px !important;
  }

  .page-download img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  
  .page-download__section,
  .page-download__card,
  .page-download__container,
  .page-download__platform-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  
  .page-download__cta-buttons,
  .page-download__button-group,
  .page-download__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
  }
  
  .page-download__cta-buttons {
    display: flex;
    flex-direction: column;
  }
}