:root {
  --color-primary: #11A84E;
  --color-secondary: #22C768;
  --color-button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --color-card-bg: #11271B;
  --color-background: #08160F;
  --color-text-main: #F2FFF6;
  --color-text-secondary: #A7D9B8;
  --color-border: #2E7A4E;
  --color-glow: #57E38D;
  --color-gold: #F2C14E;
  --color-divider: #1E3A2A;
  --color-deep-green: #0A4B2C;
}

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

.page-support__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-support__hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 0 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-support__hero-content {
  max-width: 900px;
  z-index: 2;
  margin-bottom: 40px;
  padding: 0 20px;
}

.page-support__main-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-support__intro-description {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 30px;
}

.page-support__hero-image-wrapper {
  width: 100%;
  max-width: 1200px;
  margin-top: 20px;
  position: relative;
  z-index: 1;
}

.page-support__hero-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.page-support__btn-primary,
.page-support__btn-secondary {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  cursor: pointer;
  text-align: center;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-support__btn-primary {
  background: var(--color-button-gradient);
  color: var(--color-text-main);
  border: none;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-support__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.page-support__btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.page-support__btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-text-main);
}

.page-support__btn-large {
  padding: 18px 40px;
  font-size: 1.1rem;
}

.page-support__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--color-text-main);
  text-align: center;
  margin-bottom: 20px;
  font-weight: 700;
}

.page-support__section-description {
  font-size: 1rem;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px auto;
}

/* Channels Section */
.page-support__channels-section {
  padding: 80px 0;
  background-color: var(--color-background);
}

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

.page-support__channel-card {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.page-support__card-title {
  font-size: 1.5rem;
  color: var(--color-text-main);
  margin-bottom: 15px;
  font-weight: 600;
}

.page-support__card-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 25px;
  flex-grow: 1;
}

/* Common Issues Section */
.page-support__common-issues-section {
  padding: 80px 0;
  background-color: var(--color-background);
}

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

.page-support__issue-card {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-border);
}

.page-support__issue-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-support__issue-list li {
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  position: relative;
  padding-left: 25px;
  font-size: 0.95rem;
}

.page-support__issue-list li::before {
  content: '✔';
  color: var(--color-primary);
  position: absolute;
  left: 0;
  top: 0;
  font-weight: bold;
}

/* Commitment Section */
.page-support__commitment-section {
  padding: 80px 0;
  background-color: var(--color-deep-green);
}

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

.page-support__commitment-item {
  background-color: rgba(17, 39, 27, 0.8);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-border);
}

.page-support__commitment-icon {
  width: 100%;
  height: auto;
  max-width: 180px;
  margin: 0 auto 20px auto;
  display: block;
  border-radius: 8px;
}

.page-support__item-title {
  font-size: 1.3rem;
  color: var(--color-text-main);
  margin-bottom: 10px;
  font-weight: 600;
}

.page-support__item-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* Tips Section */
.page-support__tips-section {
  padding: 80px 0;
  background-color: var(--color-background);
}

.page-support__tips-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-support__tip-item {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-border);
}

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

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

.page-support__faq-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-support__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-main);
  cursor: pointer;
  list-style: none;
}

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

.page-support__faq-toggle {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-primary);
  margin-left: 15px;
}

.page-support__faq-answer {
  padding: 0 25px 20px 25px;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

/* CTA Section */
.page-support__cta-section {
  padding: 80px 0;
  text-align: center;
  background-color: var(--color-deep-green);
}

.page-support__cta-title {
  font-size: clamp(2rem, 3.8vw, 3rem);
  color: var(--color-text-main);
  margin-bottom: 20px;
  font-weight: 700;
}

.page-support__cta-description {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto 40px auto;
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
  .page-support__hero-section {
    padding: 10px 0 40px 0;
  }
  .page-support__hero-content {
    margin-bottom: 30px;
  }
  .page-support__channels-grid,
  .page-support__issues-grid,
  .page-support__commitment-grid,
  .page-support__tips-list {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .page-support__container {
    padding: 0 15px !important;
  }

  .page-support__hero-section {
    padding: 10px 0 30px 0 !important;
  }

  .page-support__main-title {
    font-size: 2rem !important;
  }

  .page-support__intro-description {
    font-size: 1rem !important;
  }

  .page-support__section-title,
  .page-support__cta-title {
    font-size: 1.8rem !important;
  }

  .page-support__section-description,
  .page-support__cta-description {
    font-size: 0.95rem !important;
  }

  .page-support__btn-primary,
  .page-support__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 20px !important;
    font-size: 1rem !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-support__channels-grid,
  .page-support__issues-grid,
  .page-support__commitment-grid,
  .page-support__tips-list {
    grid-template-columns: 1fr !important;
  }

  .page-support__channel-card,
  .page-support__issue-card,
  .page-support__commitment-item,
  .page-support__tip-item,
  .page-support__faq-item {
    padding: 20px !important;
  }

  .page-support__channel-icon,
  .page-support__commitment-icon {
    max-width: 150px !important;
    margin-bottom: 15px !important;
  }

  .page-support__card-title,
  .page-support__item-title {
    font-size: 1.3rem !important;
  }

  .page-support__card-text,
  .page-support__item-text {
    font-size: 0.9rem !important;
  }

  .page-support__faq-question {
    font-size: 1rem !important;
    padding: 15px 20px !important;
  }

  .page-support__faq-answer {
    padding: 0 20px 15px 20px !important;
    font-size: 0.85rem !important;
  }

  /* Image responsiveness */
  .page-support img {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-support__section,
  .page-support__card,
  .page-support__container,
  .page-support__hero-image-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
  }

  /* Video responsiveness (if any, though not explicitly used here, kept for general rule) */
  .page-support video,
  .page-support__video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-support__video-section,
  .page-support__video-container,
  .page-support__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }
  .page-support__video-section {
    padding-top: 10px !important; /* body đã xử lý --header-offset */
  }

  /* Button group responsiveness */
  .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-wrap: wrap !important;
    gap: 10px;
  }
}

/* Ensure contrast for text on dark background */
.page-support {
  color: var(--color-text-main); /* #F2FFF6 on #08160F */
}
.page-support__card,
.page-support__issue-card,
.page-support__commitment-item,
.page-support__tip-item,
.page-support__faq-item {
  background-color: var(--color-card-bg); /* #11271B */
  color: var(--color-text-main); /* #F2FFF6 */
}
.page-support__section-description,
.page-support__intro-description,
.page-support__card-text,
.page-support__item-text,
.page-support__issue-list li,
.page-support__faq-answer {
  color: var(--color-text-secondary); /* #A7D9B8 */
}

/* Specific contrast adjustments if needed for brand colors */
.page-support__btn-secondary {
  color: var(--color-primary); /* #11A84E on transparent/dark background */
  border-color: var(--color-primary);
}
.page-support__btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-text-main); /* #F2FFF6 on #11A84E */
}