:root {
  --primary-color: #1A202C;
  --secondary-color: #FFD700;
  --text-light: #ffffff;
  --text-dark: #333333;
  --bg-dark: #000000;
  --bg-light: #f8f9fa;
  --card-bg-light: #ffffff;
  --border-color: #e0e0e0;
}

.page-download {
  font-family: 'Arial', sans-serif;
  color: var(--text-light); /* Default text color for dark body background */
  background-color: var(--bg-dark);
  line-height: 1.6;
}

.page-download__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-download__section-title {
  font-size: 38px;
  font-weight: bold;
  color: var(--secondary-color);
  text-align: center;
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-download__section-description {
  font-size: 18px;
  color: var(--text-light);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px auto;
}

/* Hero Section */
.page-download__hero-section {
  position: relative;
  padding-top: var(--header-offset, 120px);
  padding-bottom: 80px;
  text-align: center;
  background: var(--primary-color);
  overflow: hidden;
}

.page-download__hero-title {
  font-size: 52px;
  font-weight: 900;
  color: var(--secondary-color);
  margin-bottom: 25px;
  line-height: 1.1;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-download__hero-description {
  font-size: 20px;
  color: var(--text-light);
  max-width: 800px;
  margin: 0 auto 40px auto;
}

.page-download__download-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

.page-download__button {
  display: inline-flex;
  align-items: center;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  color: var(--text-dark);
}

.page-download__button--android {
  background: #A4C639; /* Android Green */
  color: var(--text-light);
}

.page-download__button--ios {
  background: #000000; /* Apple Black */
  color: var(--text-light);
}

.page-download__button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  opacity: 0.9;
}

.page-download__button-icon {
  width: 24px;
  height: 24px;
  margin-right: 10px;
  filter: brightness(0) invert(1); /* Ensure icons are white for dark buttons */
}

.page-download__button--android .page-download__button-icon {
  filter: none; /* Keep original color for Android green button */
}

.page-download__hero-image {
  width: 100%;
  max-width: 800px;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  margin-top: 30px;
}

/* Benefits Section */
.page-download__benefits-section {
  background: var(--bg-dark);
  padding: 80px 0;
}

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

.page-download__benefit-card {
  background: var(--card-bg-light);
  color: var(--text-dark);
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.page-download__benefit-icon {
  width: 100%;
  max-width: 250px;
  height: auto;
  margin-bottom: 20px;
  border-radius: 8px;
  object-fit: cover;
}

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

.page-download__benefit-text {
  font-size: 16px;
  color: var(--text-dark);
}

/* Guide Section */
.page-download__guide-section {
  background: var(--primary-color);
  padding: 80px 0;
  color: var(--text-light);
}

.page-download__guide-platform {
  margin-bottom: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-download__guide-platform-title {
  font-size: 32px;
  font-weight: bold;
  color: var(--secondary-color);
  margin-bottom: 30px;
  text-align: center;
}

.page-download__guide-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
  margin-bottom: 40px;
  max-width: 700px;
  width: 100%;
}

.page-download__step-item {
  display: flex;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.08);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-download__step-number {
  background: var(--secondary-color);
  color: var(--primary-color);
  font-size: 24px;
  font-weight: bold;
  width: 45px;
  height: 45px;
  min-width: 45px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 20px;
  flex-shrink: 0;
}

.page-download__step-content h4 {
  font-size: 20px;
  color: var(--secondary-color);
  margin-top: 0;
  margin-bottom: 10px;
}

.page-download__step-content p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 0;
}

.page-download__guide-image {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  margin-top: 30px;
}

.page-download__important-note {
  font-size: 17px;
  color: var(--secondary-color);
  text-align: center;
  margin-top: 40px;
  font-weight: bold;
}

.page-download__cta-download {
  text-align: center;
  margin-top: 40px;
}

.page-download__button--primary {
  background: var(--secondary-color);
  color: var(--primary-color);
  padding: 15px 40px;
  font-size: 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-download__button--primary:hover {
  background: #e6c200; /* Slightly darker secondary color */
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* Requirements Section */
.page-download__requirements-section {
  background: var(--bg-dark);
  padding: 80px 0;
}

.page-download__requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-download__requirement-card {
  background: var(--card-bg-light);
  color: var(--text-dark);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.page-download__requirement-title {
  font-size: 26px;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 20px;
  text-align: center;
}

.page-download__requirement-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-download__requirement-card li {
  font-size: 17px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  color: var(--text-dark);
}

.page-download__requirement-card li::before {
  content: '✓';
  color: #28a745; /* Green checkmark */
  font-weight: bold;
  margin-right: 10px;
  font-size: 20px;
}

.page-download__requirements-image {
  width: 100%;
  max-width: 700px;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  margin-top: 50px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

/* FAQ Section */
.page-download__faq-section {
  background: var(--primary-color);
  padding: 80px 0;
  color: var(--text-light);
}

.page-download__faq-list {
  max-width: 900px;
  margin: 50px auto 0 auto;
}

/* FAQ容器样式 */
.page-download__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 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 15px;
  opacity: 0;
  color: var(--text-dark);
}

/* FAQ展开状态 - 🚨 使用!important和足够大的max-height确保一定能展开 */
.page-download__faq-item.active .page-download__faq-answer {
  max-height: 2000px !important; /* 🚨 使用!important确保优先级，值 đủ lớn để chứa mọi nội dung */
  padding: 20px 30px !important;
  opacity: 1;
  background: var(--card-bg-light);
  border-radius: 0 0 5px 5px;
}

/* 问题样式 */
.page-download__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 30px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 5px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-download__faq-question:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

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

/* 问题标题样式 */
.page-download__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 */
  color: var(--text-light);
}

/* 切换图标 */
.page-download__faq-toggle {
  font-size: 28px;
  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: 32px;
  height: 32px;
}

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

/* Call to Action Section */
.page-download__cta-section {
  background: var(--bg-dark);
  padding: 80px 0;
  text-align: center;
}

.page-download__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.page-download__button--secondary {
  background: var(--primary-color);
  color: var(--secondary-color);
  border: 2px solid var(--secondary-color);
  padding: 15px 40px;
  font-size: 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-download__button--secondary:hover {
  background: var(--secondary-color);
  color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-download__hero-title {
    font-size: 42px;
  }
  .page-download__section-title {
    font-size: 32px;
  }
  .page-download__hero-description,
  .page-download__section-description {
    font-size: 17px;
  }
}

@media (max-width: 768px) {
  .page-download {
    font-size: 16px;
    line-height: 1.6;
  }
  .page-download__container {
    padding: 0 15px;
  }

  /* Header offset for mobile */
  .page-download__hero-section {
    padding-top: var(--header-offset, 120px) !important;
    padding-bottom: 60px;
  }

  .page-download__hero-title {
    font-size: 34px;
    margin-bottom: 20px;
  }

  .page-download__hero-description {
    font-size: 16px;
    margin-bottom: 30px;
  }

  .page-download__download-buttons {
    flex-direction: column;
    gap: 15px;
    margin-bottom: 40px;
  }

  .page-download__button {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 20px;
    font-size: 16px;
    white-space: normal !important;
    word-wrap: break-word !important;
    justify-content: center;
  }

  .page-download__button-icon {
    margin-right: 8px;
  }

  .page-download__hero-image {
    border-radius: 8px;
  }

  .page-download__section-title {
    font-size: 28px;
    margin-bottom: 15px;
  }

  .page-download__section-description {
    font-size: 16px;
    margin-bottom: 40px;
  }

  .page-download__benefits-section,
  .page-download__guide-section,
  .page-download__requirements-section,
  .page-download__faq-section,
  .page-download__cta-section {
    padding: 60px 0;
  }

  .page-download__benefits-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-download__benefit-card {
    padding: 25px;
    border-radius: 8px;
  }

  .page-download__benefit-title {
    font-size: 20px;
  }

  .page-download__guide-platform-title {
    font-size: 26px;
    margin-bottom: 20px;
  }

  .page-download__step-item {
    padding: 15px;
    border-radius: 8px;
  }

  .page-download__step-number {
    font-size: 20px;
    width: 40px;
    height: 40px;
    min-width: 40px;
    margin-right: 15px;
  }

  .page-download__step-content h4 {
    font-size: 18px;
  }

  .page-download__step-content p {
    font-size: 15px;
  }

  .page-download__guide-image,
  .page-download__requirements-image {
    border-radius: 8px;
    margin-top: 20px;
  }

  .page-download__important-note {
    font-size: 16px;
    margin-top: 30px;
  }

  .page-download__cta-download .page-download__button--primary {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 30px;
    font-size: 18px;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-download__requirements-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-download__requirement-card {
    padding: 25px;
    border-radius: 8px;
  }

  .page-download__requirement-title {
    font-size: 22px;
  }

  .page-download__requirement-card li {
    font-size: 15px;
  }

  .page-download__faq-list {
    margin-top: 30px;
  }

  .page-download__faq-question {
    padding: 15px 20px;
  }

  .page-download__faq-question h3 {
    font-size: 16px;
  }

  .page-download__faq-toggle {
    font-size: 24px;
    width: 28px;
    height: 28px;
  }

  .page-download__faq-item.active .page-download__faq-answer {
    padding: 15px 20px !important;
  }

  .page-download__cta-buttons {
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
  }

  .page-download__button--secondary {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 30px;
    font-size: 18px;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* Ensure all images are responsive */
  .page-download img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  /* Ensure all containers with images/buttons are responsive */
  .page-download__hero-section,
  .page-download__benefits-section,
  .page-download__guide-section,
  .page-download__requirements-section,
  .page-download__faq-section,
  .page-download__cta-section,
  .page-download__container,
  .page-download__download-buttons,
  .page-download__benefits-grid,
  .page-download__guide-steps,
  .page-download__requirements-grid,
  .page-download__faq-list,
  .page-download__cta-buttons {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important; /* Prevent overflow */
  }
  /* Specific overrides for containers that already have padding-left/right in desktop */
  .page-download__container {
    padding-left: 15px !important;
    padding-right: 15px !important;
  }

}