.page-support {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333333; /* Default text color for light background */
  background-color: var(--bg-color, #FFFFFF); /* Inherit from shared or default to white */
}

.page-support__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 20px 60px; /* Small top padding, more bottom padding */
  text-align: center;
  overflow: hidden;
  color: #ffffff; /* White text for dark background */
  background-color: #26A9E0; /* Brand primary color */
}

.page-support__hero-image {
  width: 100%;
  height: auto;
  display: block;
  max-width: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  opacity: 0.2;
}

.page-support__hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 0;
}

.page-support__main-title {
  font-size: clamp(2em, 4vw, 3.5em);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #ffffff;
}

.page-support__hero-description {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: #ffffff;
}

.page-support__section {
  padding: 60px 20px;
}

.page-support__light-bg {
  background-color: #ffffff;
  color: #333333;
}

.page-support__dark-bg {
  background-color: #26A9E0;
  color: #ffffff;
}

.page-support__section-title {
  font-size: 2.5em;
  font-weight: 700;
  text-align: center;
  margin-bottom: 30px;
  color: #26A9E0;
}

.page-support__section-title--white {
  color: #ffffff;
}

.page-support__section-intro {
  font-size: 1.1em;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
}

.page-support__section-intro--white {
  color: #f0f0f0;
}

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

.page-support__cta-button {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1em;
  transition: background-color 0.3s ease, color 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-support__btn-primary {
  background-color: #EA7C07; /* Login color for primary CTA */
  color: #ffffff;
  border: 2px solid #EA7C07;
}

.page-support__btn-primary:hover {
  background-color: #cc6a06;
  border-color: #cc6a06;
}

.page-support__btn-secondary {
  background-color: #ffffff;
  color: #26A9E0;
  border: 2px solid #26A9E0;
}

.page-support__btn-secondary:hover {
  background-color: #f0f0f0;
  color: #1e87c0;
}

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

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

.page-support__feature-item {
  text-align: center;
  background-color: #f9f9f9;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.page-support__feature-icon {
  width: 100%;
  height: auto;
  display: block;
  max-width: 250px;
  margin: 0 auto 20px;
  border-radius: 8px;
}

.page-support__feature-title {
  font-size: 1.5em;
  font-weight: 600;
  margin-bottom: 15px;
  color: #26A9E0;
}

.page-support__feature-description {
  font-size: 1em;
  color: #555555;
}

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

.page-support__channel-item {
  text-align: center;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  color: #ffffff;
}

.page-support__channel-icon {
  width: 100%;
  height: auto;
  display: block;
  max-width: 200px;
  margin: 0 auto 20px;
  border-radius: 8px;
}

.page-support__channel-title {
  font-size: 1.5em;
  font-weight: 600;
  margin-bottom: 15px;
  color: #ffffff;
}

.page-support__channel-description {
  font-size: 1em;
  color: #f0f0f0;
  margin-bottom: 25px;
}

.page-support__faq-list {
  max-width: 900px;
  margin: 40px auto 0;
}

.page-support__faq-item {
  background-color: #f9f9f9;
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
}

.page-support__faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  font-size: 1.15em;
  font-weight: 600;
  cursor: pointer;
  background-color: #ffffff;
  border-bottom: 1px solid #eee;
  color: #333333;
  transition: background-color 0.3s ease;
}

.page-support__faq-item summary:hover {
  background-color: #f0f0f0;
}

.page-support__faq-item summary::-webkit-details-marker {
  display: none;
}

.page-support__faq-qtext {
  flex-grow: 1;
}

.page-support__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  margin-left: 15px;
  color: #26A9E0;
}

.page-support__faq-answer {
  padding: 20px 25px;
  font-size: 1em;
  color: #555555;
  border-top: 1px solid #eee;
}

.page-support__faq-answer p {
  margin-bottom: 0;
}

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

.page-support__troubleshooting-item {
  text-align: center;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  color: #ffffff;
}

.page-support__troubleshooting-icon {
  width: 100%;
  height: auto;
  display: block;
  max-width: 200px;
  margin: 0 auto 20px;
  border-radius: 8px;
}

.page-support__troubleshooting-title {
  font-size: 1.5em;
  font-weight: 600;
  margin-bottom: 15px;
  color: #ffffff;
}

.page-support__troubleshooting-description {
  font-size: 1em;
  color: #f0f0f0;
  margin-bottom: 25px;
}

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

.page-support__app-image {
  width: 100%;
  height: auto;
  display: block;
  max-width: 600px;
  margin: 0 auto 30px;
  border-radius: 15px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .page-support__main-title {
    font-size: clamp(2em, 5vw, 3em);
  }
}

@media (max-width: 768px) {
  .page-support {
    font-size: 16px;
    line-height: 1.6;
  }

  .page-support__hero-section {
    padding: 10px 15px 40px; /* Small top padding for mobile */
  }

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

  .page-support__container {
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-support__main-title {
    font-size: clamp(1.8em, 7vw, 2.5em);
    margin-bottom: 15px;
  }

  .page-support__hero-description {
    font-size: 1em;
    margin-bottom: 20px;
  }

  .page-support__section-title {
    font-size: 2em;
    margin-bottom: 20px;
  }

  .page-support__section-intro {
    font-size: 1em;
    margin-bottom: 30px;
  }

  .page-support__features-grid,
  .page-support__contact-channels,
  .page-support__troubleshooting-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-support__cta-button,
  .page-support a[class*="button"],
  .page-support a[class*="btn"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-support__cta-buttons,
  .page-support__button-group,
  .page-support__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-direction: column !important;
    gap: 10px;
  }

  .page-support img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  .page-support__section,
  .page-support__card,
  .page-support__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-support__video-section {
    padding-top: 10px !important; /* body đã xử lý --header-offset */
  }
}

@media (max-width: 480px) {
  .page-support__main-title {
    font-size: 1.8em;
  }

  .page-support__section-title {
    font-size: 1.8em;
  }

  .page-support__cta-button {
    padding: 12px 20px;
    font-size: 1em;
  }
}