.page-index-download-guide {
  font-family: 'Arial', sans-serif;
  color: #E0E0E0; /* Light grey for general text on dark background */
  background-color: #0F1A3A; /* Slightly lighter than primary for content background */
  line-height: 1.6;
}

.page-index-download-guide__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.page-index-download-guide__hero-section {
  background: linear-gradient(135deg, #1A2B5B, #0F1A3A);
  padding: 100px 0;
  text-align: center;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.page-index-download-guide__hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('[GALLERY:bg:abstract_geometric_pattern,dark_blue_gold]') no-repeat center center/cover;
  opacity: 0.1;
  z-index: 0;
}

.page-index-download-guide__hero-section > div {
  position: relative;
  z-index: 1;
}

.page-index-download-guide__hero-title {
  font-size: 3.2em;
  margin-bottom: 20px;
  font-weight: bold;
  color: #FFD700;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-index-download-guide__hero-subtitle {
  font-size: 1.3em;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: #F0F0F0;
}

.page-index-download-guide__download-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.page-index-download-guide__btn {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-index-download-guide__btn--primary {
  background-color: #FFD700;
  color: #1A2B5B;
  border: 2px solid #FFD700;
}

.page-index-download-guide__btn--primary:hover {
  background-color: #e5c100;
  border-color: #e5c100;
  transform: translateY(-3px);
}

.page-index-download-guide__btn--secondary {
  background-color: transparent;
  color: #FFD700;
  border: 2px solid #FFD700;
}

.page-index-download-guide__btn--secondary:hover {
  background-color: #FFD700;
  color: #1A2B5B;
  transform: translateY(-3px);
}

.page-index-download-guide__qr-code-wrapper {
  margin-top: 30px;
}

.page-index-download-guide__qr-text {
  font-size: 1.1em;
  color: #F0F0F0;
  margin-bottom: 15px;
}

.page-index-download-guide__qr-code {
  width: 150px;
  height: 150px;
  border: 5px solid #FFD700;
  border-radius: 5px;
  display: block;
  margin: 0 auto;
}

.page-index-download-guide__section-title {
  font-size: 2.5em;
  color: #FFD700;
  text-align: center;
  margin-bottom: 40px;
  font-weight: bold;
  padding-top: 60px;
}

.page-index-download-guide__section-description {
  font-size: 1.1em;
  text-align: center;
  margin-bottom: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  color: #E0E0E0;
}

.page-index-download-guide__advantages-section {
  background-color: #1A2B5B;
  padding: 80px 0;
}

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

.page-index-download-guide__advantage-item {
  background-color: #0F1A3A;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.page-index-download-guide__advantage-item:hover {
  transform: translateY(-5px);
}

.page-index-download-guide__advantage-icon {
  width: 70px;
  height: 70px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 5px #FFD700);
}

.page-index-download-guide__advantage-item h3 {
  font-size: 1.5em;
  color: #FFD700;
  margin-bottom: 15px;
}

.page-index-download-guide__advantage-item p {
  font-size: 1em;
  color: #E0E0E0;
}

.page-index-download-guide__guide-section {
  padding: 80px 0;
  background-color: #0F1A3A;
}

.page-index-download-guide__tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
  border-bottom: 2px solid #3A476F;
}

.page-index-download-guide__tab-btn {
  background-color: transparent;
  border: none;
  padding: 15px 30px;
  font-size: 1.2em;
  font-weight: bold;
  color: #E0E0E0;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  outline: none;
}

.page-index-download-guide__tab-btn:hover {
  color: #FFD700;
}

.page-index-download-guide__tab-btn.active {
  color: #FFD700;
}

.page-index-download-guide__tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: #FFD700;
  border-radius: 2px;
}

.page-index-download-guide__guide-content {
  display: none;
  background-color: #1A2B5B;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.page-index-download-guide__guide-content.active {
  display: block;
}

.page-index-download-guide__guide-content h3 {
  font-size: 1.8em;
  color: #FFD700;
  margin-bottom: 25px;
  text-align: center;
}

.page-index-download-guide__guide-content ol {
  list-style: none;
  padding: 0;
  counter-reset: step-counter;
}

.page-index-download-guide__guide-content li {
  margin-bottom: 30px;
  padding-left: 50px;
  position: relative;
  color: #F0F0F0;
  font-size: 1.1em;
}

.page-index-download-guide__guide-content li::before {
  counter-increment: step-counter;
  content: "Bước " counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  background-color: #FFD700;
  color: #1A2B5B;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.1em;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.page-index-download-guide__guide-content li strong {
  color: #FFD700;
  font-size: 1.2em;
}

.page-index-download-guide__step-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-top: 20px;
  border: 1px solid #3A476F;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.page-index-download-guide__important-note {
  background-color: #2A3B6F;
  padding: 20px;
  border-left: 5px solid #FFD700;
  margin-top: 40px;
  border-radius: 5px;
  color: #F0F0F0;
  font-size: 1.1em;
}

.page-index-download-guide__cta-bottom {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 50px;
  flex-wrap: wrap;
}

.page-index-download-guide__faq-section {
  background-color: #1A2B5B;
  padding: 80px 0;
}

.page-index-download-guide__faq-item {
  background-color: #0F1A3A;
  padding: 25px;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.page-index-download-guide__faq-question {
  font-size: 1.3em;
  color: #FFD700;
  margin-bottom: 10px;
  cursor: pointer;
  position: relative;
  padding-right: 30px;
}

.page-index-download-guide__faq-question::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  font-size: 1.2em;
  color: #FFD700;
  transition: transform 0.3s ease;
}

.page-index-download-guide__faq-question.active::after {
  content: '-';
  transform: rotate(180deg);
}

.page-index-download-guide__faq-answer {
  font-size: 1em;
  color: #E0E0E0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease-out, opacity 0.5s ease-out;
  opacity: 0;
}

.page-index-download-guide__faq-answer.open {
  max-height: 200px; /* Adjust as needed */
  opacity: 1;
  margin-top: 15px;
}

.page-index-download-guide__cta-final {
  background-color: #0F1A3A;
  padding: 80px 0;
  text-align: center;
}

.page-index-download-guide__btn--large {
  padding: 18px 40px;
  font-size: 1.3em;
  margin-top: 30px;
}

.page-index-download-guide .highlight {
  color: #FFD700;
}

/* Floating Promo Button */
.page-index-download-guide__floating-promo {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  align-items: center;
  background-color: #FFD700;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transform: translateX(120%); /* Initially hidden */
  transition: transform 0.5s ease-in-out;
}

.page-index-download-guide__floating-promo.show {
  transform: translateX(0);
}

.page-index-download-guide__floating-btn {
  display: flex;
  align-items: center;
  padding: 10px 20px;
  text-decoration: none;
  color: #1A2B5B;
  font-weight: bold;
  font-size: 1.1em;
}

.page-index-download-guide__floating-icon {
  width: 30px;
  height: 30px;
  margin-right: 10px;
}

.page-index-download-guide__floating-close-btn {
  background-color: #1A2B5B;
  color: #FFD700;
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  font-size: 1.5em;
  line-height: 1;
  cursor: pointer;
  margin-left: -10px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.page-index-download-guide__floating-close-btn:hover {
  background-color: #0F1A3A;
}

/* Responsive Design */
@media (max-width: 992px) {
  .page-index-download-guide__hero-title {
    font-size: 2.8em;
  }
  .page-index-download-guide__section-title {
    font-size: 2em;
  }
  .page-index-download-guide__advantages-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .page-index-download-guide__hero-section {
    padding: 80px 0;
  }
  .page-index-download-guide__hero-title {
    font-size: 2.2em;
  }
  .page-index-download-guide__hero-subtitle {
    font-size: 1.1em;
  }
  .page-index-download-guide__download-buttons {
    flex-direction: column;
    gap: 15px;
  }
  .page-index-download-guide__btn {
    width: 80%;
    margin: 0 auto;
  }
  .page-index-download-guide__section-title {
    font-size: 1.8em;
  }
  .page-index-download-guide__guide-content {
    padding: 30px 20px;
  }
  .page-index-download-guide__guide-content li {
    padding-left: 40px;
  }
  .page-index-download-guide__guide-content li::before {
    width: 35px;
    height: 35px;
    font-size: 1em;
  }
  .page-index-download-guide__cta-bottom {
    flex-direction: column;
  }
  .page-index-download-guide__floating-promo {
    bottom: 15px;
    right: 15px;
  }
  .page-index-download-guide__floating-btn {
    padding: 8px 15px;
    font-size: 1em;
  }
  .page-index-download-guide__floating-icon {
    width: 25px;
    height: 25px;
  }
  .page-index-download-guide__floating-close-btn {
    width: 25px;
    height: 25px;
    font-size: 1.2em;
    margin-left: -8px;
  }
}

@media (max-width: 480px) {
  .page-index-download-guide__hero-section {
    padding: 60px 0;
  }
  .page-index-download-guide__hero-title {
    font-size: 1.8em;
  }
  .page-index-download-guide__hero-subtitle {
    font-size: 1em;
  }
  .page-index-download-guide__btn {
    width: 90%;
    padding: 12px 20px;
    font-size: 1em;
  }
  .page-index-download-guide__qr-code {
    width: 120px;
    height: 120px;
  }
  .page-index-download-guide__section-title {
    font-size: 1.5em;
  }
  .page-index-download-guide__section-description {
    font-size: 0.95em;
  }
  .page-index-download-guide__tabs {
    flex-direction: column;
  }
  .page-index-download-guide__tab-btn {
    width: 100%;
    border-bottom: 1px solid #3A476F;
  }
  .page-index-download-guide__tab-btn.active::after {
    width: 50%;
    left: 25%;
  }
  .page-index-download-guide__guide-content h3 {
    font-size: 1.5em;
  }
  .page-index-download-guide__guide-content li {
    font-size: 1em;
  }
  .page-index-download-guide__faq-question {
    font-size: 1.1em;
  }
  .page-index-download-guide__floating-promo {
    bottom: 10px;
    right: 10px;
  }
  .page-index-download-guide__floating-btn {
    padding: 6px 10px;
    font-size: 0.9em;
  }
  .page-index-download-guide__floating-icon {
    width: 20px;
    height: 20px;
    margin-right: 5px;
  }
  .page-index-download-guide__floating-close-btn {
    width: 20px;
    height: 20px;
    font-size: 1em;
    margin-left: -5px;
  }
}